A joint device for segmented tunnels in ground fissure sites and a construction method thereof

Abstract

The present invention discloses a joint device for a segmented tunnel in a ground fissure site and a construction method thereof, comprising a first waterproof mechanism, wherein the first waterproof mechanism is arranged between a first tunnel lining and a second tunnel lining along the axial direction of the segmented tunnel; a second waterproof mechanism is arranged at the cutout of an adjacent segmented tunnel; a third waterproof mechanism is arranged at the cutout of an adjacent segmented tunnel and is arranged close to one side of the inner surface of the segmented tunnel; a fourth waterproof mechanism is arranged at the cutout of an adjacent segmented tunnel and is located on the inner surface of the segmented tunnel; a sliding connection mechanism is arranged at the cutout of an adjacent segmented tunnel and is located between the second waterproof mechanism and the third waterproof mechanism; a first connection sleeve in the sliding connection mechanism can slide freely in a vertical sliding track along the diameter direction of the segmented tunnel, and a second connection sleeve can slide freely in a horizontal sliding track along the diameter direction of the vertical segmented tunnel; the present invention has good waterproof effect, high strength and controllability, and sensitive deformation feedback.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering protection, and in particular relates to a joint device for a segmented tunnel in a ground fissure site and a construction method thereof. Background Art

[0002] In recent years, with the rapid advancement of urbanization, urban population density has increased rapidly, and ground transportation is facing tremendous pressure. In the context of increasingly tight urban land resources, in order to effectively alleviate urban congestion, many cities are seeking development space underground and vigorously promoting urban subway construction. However, due to different geological conditions in different cities, their differences and complexity lead to many challenges in urban subway construction.

[0003] The protection of subway tunnels in ground fissures is a major problem. The slow movement of ground fissures will cause differential settlement of the upper and lower soils, resulting in three-dimensional deformation (vertical>axial>horizontal) and torsional deformation of subway tunnels crossing ground fissures within a certain range, thereby destroying the stability of the structure and threatening the safety of subway operations. In order to enable the tunnel to adapt to the deformation of ground fissures within a certain range and reduce the deformation and damage of the structure, the current practice is to segment the structure within a certain range of the tunnel crossing the ground fissure, set a certain number of deformation joints and use flexible structural connections; however, due to the influence of the number of tunnel segments, the tunnel faces great waterproofing pressure, and the existing segment joints only consider tensile and compressive deformation, and their strength and controllability are not high, which seriously affects the waterproofing effect when the deformation is large; in addition, the deformation of the segmented tunnel caused by the slow deformation of the ground fissures is not obvious in the early stage, and when the tunnel is obviously deformed, the timely maintenance time has been missed, resulting in high maintenance costs.

[0004] Therefore, it is necessary to provide a segmented tunnel joint and construction method for ground fissure sites with high strength, strong controllability, good waterproof effect and sensitive deformation feedback to solve the above technical problems. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a joint device for a segmented tunnel in a ground fissure site and a construction method thereof, so as to solve the technical problems that the existing segmented tunnel joints only consider tensile and compressive deformations, have low strength and controllability, seriously affect the waterproof effect when there is a large deformation, and have poor deformation feedback sensitivity.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a joint device for a segmented tunnel in a ground fissure site, comprising a first waterproof mechanism, a second waterproof mechanism, a sliding connection mechanism, a third waterproof mechanism and a fourth waterproof mechanism; the first waterproof mechanism is arranged between a first tunnel lining and a second tunnel lining along the axial direction of the segmented tunnel; the second waterproof mechanism is arranged at the cutout of an adjacent segmented tunnel, one end of the second waterproof mechanism is connected to the outer surface of the second tunnel lining of the previous tunnel section, and the other end of the second waterproof mechanism is connected to the outer surface of the second tunnel lining of the next tunnel section; the third waterproof mechanism is arranged in the cutout of the adjacent segmented tunnel and is arranged close to one side of the inner surface of the segmented tunnel; one side of the third waterproof mechanism is in close contact with the end face of the cutout of the second tunnel lining of the previous tunnel section, and the other side of the third waterproof mechanism is in close contact with the end face of the second tunnel lining of the next tunnel section; the fourth waterproof mechanism is arranged at the cutout of the adjacent segmented tunnel and is located on the inner surface of the segmented tunnel; one end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining of the previous tunnel section, and the other end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining of the next tunnel section;

[0008] The sliding connection mechanism is arranged at the incision of adjacent segmented tunnels and is located between the second waterproof mechanism and the third waterproof mechanism; the sliding connection mechanism includes a vertical sliding track, a first connecting sleeve, a first bite hook, a second bite hook, a second connecting sleeve and a horizontal sliding track; one side of the vertical sliding track is fixed to the end face of the second lining of the tunnel of the previous tunnel section, and the other side of the vertical sliding track is slidingly connected to one end of the first connecting sleeve, the other end of the first connecting sleeve is connected to one end of the first bite hook, the other end of the first bite hook is bite-fixed with one end of the second bite hook, the other end of the second bite hook is connected to one end of the second connecting sleeve, the other end of the second connecting sleeve is slidingly connected to one side of the horizontal sliding track, and the other side of the horizontal sliding track is fixed to the end face of the second lining of the tunnel of the next tunnel section; wherein the sliding end of the first connecting sleeve can slide freely in the vertical sliding track along the diameter direction of the segmented tunnel, and the sliding end of the second connecting sleeve can slide freely in the horizontal sliding track along the diameter direction of the vertical segmented tunnel.

[0009] Furthermore, the first waterproof mechanism adopts a waterproof layer; the waterproof layer is laid between the first lining and the second lining of the tunnel along the axial direction of the segmented tunnel; wherein the waterproof layer adopts EVC waterproof board or acrylic spray film.

[0010] Furthermore, the second waterproof mechanism adopts a shaped water stop; the shaped water stop is arranged along the cutout of the adjacent segmented tunnels and is placed between the first lining of the tunnel and the second lining of the tunnel; one side of the shaped water stop is closely arranged with the inner surface of the first lining of the tunnel, and the other side is closely arranged with the outer surface of the second lining of the tunnel;

[0011] A protrusion is provided on the side of the shaped waterstop facing the secondary lining of the tunnel, and the protrusion is provided at the incision of the adjacent segmented tunnel; one wing of the shaped waterstop is fixedly connected to the outer surface of the secondary lining of the tunnel of the previous tunnel section, and the other wing of the shaped waterstop is fixedly connected to the outer surface of the secondary lining of the tunnel of the next tunnel section.

[0012] Furthermore, the third waterproof mechanism adopts a water-stop airbag; the water-stop airbag includes an inflatable airbag and an inflation tube, the inflatable airbag is constrained in the incision of the adjacent segmented tunnel and is located between the sliding connection mechanism and the fourth waterproof mechanism; one end of the inflation tube is connected to the inflation and exhaust port of the inflatable airbag, and the other end extends to the inside of the segmented tunnel and is connected to the air source; the inflation tube is provided with a pressure gauge and an inflation valve.

[0013] Furthermore, the fourth waterproof mechanism adopts an Ω waterstop; the Ω waterstop is arranged along the incision of the adjacent segmented tunnel and placed on the inner surface of the second lining of the tunnel; one wing of the Ω waterstop is fixedly connected to the inner surface of the second lining of the tunnel of the previous tunnel section, and the other wing of the Ω waterstop is fixedly connected to the inner surface of the second lining of the tunnel of the next tunnel section; an arc-shaped protrusion is arranged in the middle of the Ω waterstop, and the arc-shaped protrusion is arranged opposite to the incision of the adjacent segmented tunnel and is arranged facing the inner side of the segmented tunnel.

[0014] Furthermore, it also includes a right-angle waterproof plate, which is symmetrically arranged at the cutouts of adjacent segmented tunnels and placed between the second lining of the tunnel and the Ω waterstop;

[0015] The right-angle waterproof plate includes an L-shaped steel plate, a stiffening plate and a waterproof pad; the L-shaped steel plate is arranged at the right-angle end of the cutout of the tunnel secondary lining, the long side of the L-shaped steel plate is buried in the inner surface of the tunnel secondary lining, and the short side of the L-shaped steel plate is buried in the end of the tunnel secondary lining; the stiffening plate is vertically fixed on the long side of the L-shaped steel plate and is arranged away from the short side of the L-shaped steel plate;

[0016] One end of the stiffening plate is fixedly connected to the long side of the L-shaped steel plate, and the other end extends into the secondary lining of the tunnel; the waterproof pad is arranged on the outside of the long side of the L-shaped steel plate, one side of the waterproof pad is tightly fixed to the long side of the L-shaped steel plate, and the other side is tightly fixed to the Ω waterstop.

[0017] Furthermore, the vertical sliding track includes a first slide groove and two first guide rods; the first slide groove is fixed to the end face of the cutout of the second lining of the upper tunnel section, the first slide groove is a rectangular box-shaped structure with one side open, and the open side of the first slide groove is arranged facing the cutout of the adjacent segmented tunnel; the two first guide rods are arranged in parallel on the open side of the first slide groove, and the axis of the first guide rod is consistent with the diameter direction of the segmented tunnel; the sliding end of the first connecting sleeve is slidably arranged between the two first guide rods, and can slide freely along the axis direction of the first guide rod;

[0018] The horizontal sliding track includes a second slide groove and two second guide rods; the second slide groove is fixed on the inner side of the end face of the tunnel second lining cutout of the next tunnel section, the second slide groove is a rectangular box-shaped structure with one side open, and the open side of the second slide groove is arranged facing the cutout of the adjacent segmented tunnel; the two second guide rods are arranged in parallel on the open side of the second slide groove, and the axis of the second guide rod is perpendicular to the diameter direction of the segmented tunnel; the sliding end of the second connecting sleeve is slidably arranged between the two second guide rods, and can slide freely along the axis direction of the second guide rod.

[0019] Furthermore, the first connecting sleeve and the second connecting sleeve have the same structure, and respectively include an outer sleeve, a first inner sleeve, a second inner sleeve, a first rolling bearing, a second rolling bearing and a pulley;

[0020] One end of the first inner sleeve is connected to the first snap hook or the second snap hook, and the other end of the first inner sleeve is inserted into one end of the outer sleeve; wherein a first rolling bearing is arranged between the first inner sleeve and the outer sleeve; the inner ring of the first rolling bearing is fixedly connected to the outer wall of the first inner sleeve, and the outer ring of the first rolling bearing is fixedly connected to the inner wall of one end of the outer sleeve;

[0021] One end of the second inner sleeve is inserted into the other end of the outer sleeve, and the other end of the second inner sleeve is fixed to the pulley; wherein a second rolling bearing is arranged between the second inner sleeve and the outer sleeve; the inner ring of the second rolling bearing is fixedly connected to the outer wall of the second inner sleeve, and the outer ring of the second rolling bearing is fixedly connected to the inner wall of the other end of the outer sleeve;

[0022] A plurality of elastic retaining pins are arranged on the outer side walls of the first inner sleeve and the second inner sleeve, and the plurality of elastic retaining pins are evenly arranged along the outer circumferential surface of the first inner sleeve or the second inner sleeve; a plurality of first positioning holes are arranged at one end of the outer sleeve, and a plurality of second positioning holes are arranged at the other end; some of the elastic retaining pins on the first inner sleeve are matched and arranged in the first positioning holes of the outer sleeve, and some of the elastic retaining pins on the second inner sleeve are matched and arranged in the second positioning holes of the outer sleeve;

[0023] The end face of the pulley is fixedly connected to the end of the second inner sleeve, and the rotation axis of the pulley coincides with the axis of the second inner sleeve; a U-shaped groove is provided on the outer circumference of the pulley, one side of the U-shaped groove is matched and connected with one of the first guide rods or one of the second guide rods, and the other side of the U-shaped groove is matched and connected with the other first guide rod or the other second guide rod.

[0024] Furthermore, it also includes a plurality of first grouting pipes and a plurality of second grouting pipes; the plurality of first grouting pipes are evenly distributed in the previous segmented tunnel along the cutouts of the adjacent segmented tunnels, and the plurality of second grouting pipes are evenly distributed in the next segmented tunnel along the cutouts of the adjacent segmented tunnels; and the first grouting pipes and the second grouting pipes are both inclined toward the cutouts of the adjacent segmented tunnels;

[0025] One end of the first grouting pipe is exposed on the inner surface of the second lining of the previous section tunnel, and the other end penetrates through the second lining and the first lining of the previous section tunnel in sequence, and extends to the outside of the outer surface of the first lining of the previous tunnel; one end of the second grouting pipe is exposed on the inner surface of the second lining of the next section tunnel, and the other end penetrates through the second lining and the first lining of the next section tunnel in sequence, and extends to the outside of the outer surface of the first lining of the next tunnel.

[0026] The present invention also provides a construction method for a joint device for a segmented tunnel in a ground fissure site, comprising the following steps:

[0027] During the construction of segmented tunnels, after the construction of the first lining of the tunnel is completed, the first and second waterproof mechanisms are constructed circumferentially on the inner surface of the first lining of the tunnel; during the construction of the second lining of the tunnel, a sliding connection mechanism is installed at a specific position at the cut section of the adjacent segmented tunnels so that it engages to connect the two segmented tunnels, and then the third waterproof mechanism is laid circumferentially; after the construction of the second lining of the tunnel is completed, a fourth waterproof mechanism is constructed on the inner surface of the second lining of the tunnel; after the overall construction is completed, the inflatable airbag is inflated through the inflation pipe, and the inflation valve is closed when the pressure gauge reaches the design pressure value.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a joint device for segmented tunnels in ground fissure sites and a construction method thereof. By arranging four waterproof mechanisms, the four waterproof mechanisms work together to achieve an effective waterproof effect. By arranging a sliding connection mechanism at the incisions of adjacent segmented tunnels, two connecting sleeves are respectively slidably connected to a vertical sliding track and a horizontal sliding track, so that the segmented tunnels on both sides of the incision can achieve horizontal or vertical relative deformation when the ground fissure is active. At the same time, the two connecting sleeves are connected by a bite hook, which effectively enhances the integrity and overall strength of the segmented tunnel, so that the structural strength can be used to resist small deformation, and can adapt to large deformation, and can be disconnected in large deformation, thereby protecting the safety of the segmented tunnel joint to the maximum extent. The invention has good waterproof effect, high structural safety, and convenient maintenance and monitoring. It has high application value in the field of actual tunnel engineering construction and maintenance, and can provide guidance for the protection of segmented tunnels in ground fissure sites.

[0030] Furthermore, the first waterproof mechanism adopts a waterproof layer, and the waterproof board adopts EVC waterproof board or acrylic spray film, which is laid along the axial direction of the segmented tunnel and is located between the first lining and the second lining of the tunnel, forming the first waterproofing and providing preliminary guarantee for the subsequent tunnel construction and operation.

[0031] Furthermore, the second waterproofing mechanism adopts a shaped waterstop, which is laid along the incision of adjacent segmented tunnels and placed between the first lining and the second lining of the tunnel. The shaped waterstop is made of high-elastic rubber with good tensile properties, and the two wings are fixed to both sides of the lining incision by bolts to form a second waterproofing and can achieve a certain degree of tensile and compressive deformation.

[0032] Furthermore, the third waterproof mechanism adopts a water-stopping airbag, which is located in the incision of the adjacent segmented tunnel; the inflatable airbag adopts high-elastic rubber with good expansion and compression properties as the third waterproofing, which can maintain a close fit with the steel plates on both sides of the incision when the incision is deformed, thereby ensuring the waterproofing effect; a pressure gauge and an inflation valve are arranged on the inflation pipe located in the segmented tunnel, and the airbag pressure is analyzed by the reading of the pressure gauge, so that the deformation of the incision can be judged and the activity of the ground fissure can be further analyzed, so as to make timely corresponding responses; the inflation valve is used to inflate or deflate the internal air pressure so that it is within the design range, thereby ensuring the waterproofing effect during deformation; when the inflatable airbag is damaged, the pressure gauge reading returns to zero, prompting timely repair and replacement.

[0033] Furthermore, the fourth waterproof mechanism adopts Ω waterstop, which is made of high-elastic rubber with good tensile properties. It is fixed to the outside of the right-angle waterproof plate on both sides of the internal incision of the tunnel by bolts, with a waterproof pad in the middle to enhance the waterproof effect.

[0034] Furthermore, right-angle waterproof plates are arranged at the right-angle edges on both sides of the internal cutout of the tunnel secondary lining to reinforce the strength of the structural right-angle ends of the tunnel secondary lining and provide conditions for the installation of waterproof pads and Ω waterstops.

[0035] Furthermore, the horizontal sliding track is set on the inner side of the end face of the tunnel second lining cut of the next tunnel section, and the vertical sliding track is set on the inner side of the end face of the tunnel second lining cut of the previous tunnel section, which conforms to the movement mode in which the upper plate of the ground fissure sinks while the lower plate is stable, so that the vertical deformation and horizontal deformation of the structure are consumed by the sliding device within a certain range, thereby ensuring the safety of the tunnel.

[0036] Furthermore, the first connecting sleeve or the second connecting sleeve is respectively assembled through an outer sleeve, two inner sleeves, two rolling bearings and a pulley, and the two inner sleeves can telescope and slide in the outer sleeve, so that the axial deformation of the structure is consumed within a preset range through the sliding of the inner sleeve and the outer sleeve; elastic retaining nails are evenly distributed on the inner sleeve to fix the relative position through positioning holes, which provides strength for the structure and avoids arbitrary axial telescopic deformation; a bite hook is used between the two connecting sleeves to achieve a rigid connection, increase the integrity and strength of the structure to resist small deformations caused by ground fissures, and can be disconnected in the event of large deformation to protect the lining concrete and allow the structures on both sides to deform freely; at the same time, a rolling bearing is arranged between the inner sleeve and the outer sleeve, and under the action of the rolling bearing, a preset rotational deformation can be generated, so that the lining on both sides of the incision can adapt to the torsional deformation of the structure caused by the ground fissures.

[0037] Furthermore, the grouting pipes are arranged obliquely in the upper tunnel section and the lower tunnel section of the lining, and the upper tunnel section has more grouting pipes than the lower tunnel section. The outlet direction of the slurry is toward the location of the incision, which is convenient for timely grouting reinforcement after the ground fissures are active.

[0038] The joint device for segmented tunnels in ground fissure sites and the construction method thereof described in the present invention, by arranging a waterproof layer, an Ω-shaped waterstop, a sliding connection mechanism device, a waterstop airbag and an Ω waterstop to form a joint protection device, can not only provide a certain strength, so that the tunnel can achieve a small range of three-way deformation and rotational deformation; it can also operate the bite hook in the sliding connection mechanism to disengage during large deformation, and inflate or deflate the waterstop airbag to improve the deformation and waterproof ability of the joint; with auxiliary measures such as a waterproof layer, a right-angle waterproof plate and a grouting pipe, the waterproof performance of the lining joint can be further protected and reinforced; the deformation of the tunnel joint and the activity of the ground fissure can be reflected by the change in the reading of the pressure gauge, and timely monitoring and response can be made; the waterproof effect is good, the strength and controllability are high, the deformation feedback is sensitive, and the maintenance and monitoring are convenient, which can provide guidance for the protection of subway segmented tunnel projects in ground fissure sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the joint device for the segmented tunnel in the ground fissure site described in the embodiment;

[0040] Figure 2 Schematic diagram of the structure of the water stop strip in the embodiment;

[0041] Figure 3 is a structural schematic diagram of a sliding connection mechanism in an embodiment;

[0042] Figure 4 is an exploded schematic diagram of a vertical sliding track in an embodiment;

[0043] Figure 5 is a schematic structural diagram of a first connecting sleeve in an embodiment;

[0044] Figure 6 is a schematic structural diagram of the first inner sleeve in the embodiment;

[0045] Figure 7 is a schematic structural diagram of a grooved steel plate in an embodiment;

[0046] Figure 8 It is a schematic diagram of the structure of the water-stopping airbag in the embodiment;

[0047] Fig. 9 is a schematic structural diagram of a right-angle waterproof plate in an embodiment;

[0048] Fig.10 It is a schematic diagram of the structure of the Ω waterstop in the embodiment.

[0049] Among them, 1 waterproof layer, 2 and shaped water stop strip, 3 sliding connection mechanism, 4 grooved steel plate, 5 water stop airbag, 6 right angle waterproof plate, 7 Ω water stop strip, 8 first grouting pipe, 9 second grouting pipe, 10 first fixing bolt, 11 second fixing bolt, 12 tunnel first lining, 13 tunnel second lining; 21 protrusion; 31 vertical sliding track, 32 first connecting sleeve, 33 first bite hook, 34 second bite hook, 35 second connecting sleeve, 36 horizontal sliding track; 41 trapezoidal steel groove, 42 steel groove end plate, 43 first fixing hole, 44 second fixing hole, 45 second fixing hole, 46 first fixing hole, 47 first fixing hole, 48 first fixing hole, 49 first fixing hole, 50 first fixing hole, 51 first fixing hole, 52 first fixing hole, 53 second fixing hole, 54 second fixing hole, 55 second fixing hole, 56 first fixing hole, 57 first fixing hole, 58 first fixing hole, 59 first fixing hole, 60 first fixing hole, 61 first fixing hole, 62 first fixing hole, 63 first fixing hole, 64 second fixing hole, 65 first fixing hole, 66 first fixing hole, 67 first fixing hole, 68 first fixing hole, 69 first fixing hole, 70 first fixing hole, 71 first fixing hole, 72 first fixing hole, 73 first fixing hole, 74 second fixing hole, 75 second fixing hole, 76 first fixing hole, 77 first fixing hole, 78 first fixing hole, 79 first fixing hole, 80 first fixing hole, 81 first fixing hole, 82 first fixing hole, 83 first fixing hole, 84 first fixing hole, 85 second fixing hole, 86 4 second fixing hole; 51 inflatable airbag, 52 pressure gauge, 53 inflation valve, 54 inflation tube; 61 L-shaped steel plate, 62 stiffening plate, 63 bolt hole, 64 waterproof pad; 71 interface through hole, 72 round plate cushion; 301 first slide groove, 302 first guide rod, 303 first bayonet; 304 outer sleeve, 305 first inner sleeve, 306 second inner sleeve, 307 first positioning hole, 308 second positioning hole, 309 elastic retaining nail, 310 first rolling bearing, 311 second rolling bearing, 312 pulley. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] The present invention discloses a joint device for a segmented tunnel in a ground fissure site. The joint device is used for the protection project of a segmented subway tunnel in a ground fissure site. The joint device includes a first waterproof mechanism, a second waterproof mechanism, a sliding connection mechanism 3, a grooved steel plate 4, a third waterproof mechanism, a fourth waterproof mechanism and a right-angle waterproof plate 6.

[0052] The first waterproof mechanism is arranged between the first tunnel lining 12 and the second tunnel lining 13 along the axial direction of the segmented tunnel; the first waterproof mechanism adopts a waterproof layer 1; the waterproof layer 1 is laid between the first tunnel lining 12 and the second tunnel lining 13 along the axial direction of the segmented tunnel; preferably, the waterproof layer 1 adopts EVC waterproof board or acrylic spray film.

[0053] The second waterproof mechanism is arranged at the incision of the adjacent segmented tunnel, one end of the second waterproof mechanism is connected to the outer surface of the second lining 13 of the previous tunnel section, and the other end of the second waterproof mechanism is connected to the outer surface of the second lining 13 of the next tunnel section; in the present invention, the second waterproof mechanism adopts a shaped waterstop 2; the shaped waterstop 2 is arranged along the incision of the adjacent segmented tunnel and is placed between the first lining 12 of the tunnel and the second lining 13 of the tunnel; one side of the shaped waterstop 2 is tightly arranged with the inner surface of the first lining 12 of the tunnel, and the other side is tightly arranged with the outer surface of the second lining 13 of the tunnel; the shaped waterstop 2 is provided with a protrusion 21 on the side facing the second lining 13 of the tunnel, and the protrusion 21 is arranged at the incision of the adjacent segmented tunnel; one wing of the shaped waterstop 2 is fixedly connected to the outer surface of the second lining 13 of the previous tunnel section by a plurality of first fixing bolts 10, and the other wing of the shaped waterstop 2 is fixedly connected to the outer surface of the second lining 13 of the next tunnel section by a plurality of first fixing bolts 10.

[0054] The sliding connection mechanism 3 is arranged in the incision of the adjacent segmented tunnels and is located between the second waterproof mechanism and the third waterproof mechanism; one end of the sliding connection mechanism 3 is connected to the incision end face of the tunnel second lining 13 of the previous tunnel section, and the other end of the sliding connection mechanism 3 is connected to the incision end face of the tunnel second lining 13 of the next tunnel section.

[0055] In the present invention, the sliding connection mechanism 3 includes a vertical sliding track 31, a first connecting sleeve 32, a first bite hook 33, a second bite hook 34, a second connecting sleeve 35 and a horizontal sliding track 36; one side of the vertical sliding track 31 is fixed to the end face of the second tunnel lining 13 of the previous tunnel section, and the other side of the vertical sliding track 31 is slidably connected to one end of the first connecting sleeve 32; the other end of the first connecting sleeve 32 is connected to one end of the first bite hook 33, and the other end of the first bite hook 33 is connected to one end of the second bite hook 34. The second engaging hook 34 is connected to one end of the second connecting sleeve 35, and the other end of the second connecting sleeve 35 is slidably connected to one side of the horizontal sliding track 36, and the other side of the horizontal sliding track 36 is fixed to the end face of the second tunnel lining 13 of the next tunnel section; wherein, the sliding end of the first connecting sleeve 32 can slide freely in the vertical sliding track 31 along the diameter direction of the segmented tunnel, and the sliding end of the second connecting sleeve 35 can slide freely in the horizontal sliding track 36 along the diameter direction of the vertical segmented tunnel.

[0056] The vertical sliding track 31 includes a first slide groove 301 and two first guide rods 302; the first slide groove 301 is fixed on the inner side of the cut end face of the second lining 13 of the previous tunnel section, and the first slide groove 301 is a rectangular box-shaped structure with one side open, and the open side of the first slide groove 301 is arranged facing the cutout of the adjacent segmented tunnel; the two first guide rods 302 are arranged in parallel on the open side of the first slide groove 301, and the axis of the first guide rod 302 is consistent with the diameter direction of the segmented tunnel; the sliding end of the first connecting sleeve 32 is slidably arranged between the two first guide rods 302, and can slide freely along the axis direction of the first guide rod 302.

[0057] The horizontal sliding track 36 includes a second slide groove and two second guide rods; the second slide groove is fixed to the inner side of the cut end face of the tunnel second lining 13 of the next tunnel section, and the second slide groove is a rectangular box-shaped structure with one side open, and the open side of the second slide groove is arranged facing the cutout of the adjacent segmented tunnel; the two second guide rods are arranged in parallel on the open side of the second slide groove, and the axis of the second guide rod is perpendicular to the diameter direction of the segmented tunnel; the sliding end of the second connecting sleeve 35 is slidably arranged between the two second guide rods, and can slide freely along the axis direction of the second guide rod.

[0058] In the present invention, the first connecting sleeve 32 and the second connecting sleeve 35 have the same structure, and respectively include an outer sleeve 304, a first inner sleeve 305, a second inner sleeve 306, a first rolling bearing 310, a second rolling bearing 311 and a pulley 312; one end of the first inner sleeve 305 is connected to the first bite hook 33 or the second bite hook 34, and the other end of the first inner sleeve 305 is inserted into one end of the outer sleeve 304; wherein a first rolling bearing 310 is arranged between the first inner sleeve 305 and the outer sleeve 304; The inner ring of the first rolling bearing 310 is fixedly connected to the outer side wall of the first inner sleeve 305, and the outer ring of the first rolling bearing 310 is fixedly connected to the inner side wall of one end of the outer sleeve 304; one end of the second inner sleeve 306 is inserted into the other end of the outer sleeve 304, and the other end of the second inner sleeve 306 is fixed to the pulley 312; wherein, a second rolling bearing 311 is arranged between the second inner sleeve 306 and the outer sleeve 304; the inner ring of the second rolling bearing 311 is fixedly connected to the outer side wall of the second inner sleeve 306, The outer ring of the second rolling bearing 311 is fixedly connected to the inner wall of the other end of the outer sleeve 304; a plurality of elastic retaining pins 309 are arranged on the outer walls of the first inner sleeve 305 and the second inner sleeve 306, and the plurality of elastic retaining pins 309 are evenly arranged along the outer circumferential surface of the first inner sleeve 305 or the second inner sleeve 306; a plurality of first positioning holes 307 are arranged at one end of the outer sleeve 304, and a plurality of second positioning holes 308 are arranged at the other end; some of the elastic retaining pins on the first inner sleeve 305 are arranged in cooperation with the outer sleeve 304 In the first positioning hole 307, part of the elastic retaining pins on the second inner sleeve 306 are matched and arranged in the second positioning hole 308 of the outer sleeve 304; the end face of the pulley 312 is fixedly connected to the end of the second inner sleeve 306, and the rotation axis of the pulley 312 coincides with the axis of the second inner sleeve 306; a U-shaped groove is provided on the outer circumference of the pulley 312, one side of the U-shaped groove is matched and connected with one of the first guide rods or one of the second guide rods, and the other side of the U-shaped groove is matched and connected with the other first guide rod or the other second guide rod.

[0059] In the present invention, a grooved steel plate 4 is arranged between the vertical sliding track 31 and the end face of the tunnel secondary lining 13 of the previous tunnel section, and another grooved steel plate 4 is arranged between the horizontal sliding track 36 and the end face of the tunnel secondary lining 13 of the next tunnel section; the grooved steel plate 4 includes a trapezoidal steel groove 41 and a steel groove end plate 42, and the steel groove end plate 42 is fixed on the end face of the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section; the trapezoidal steel groove 41 is arranged on the steel groove end plate 42 and is arranged close to one side of the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section; one end of the trapezoidal steel groove 41 is embedded in the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section, and the other side is connected with the steel groove end plate 42; the vertical sliding track 31 is installed in the trapezoidal steel groove 41 on the end face of the tunnel secondary lining 13 of the previous tunnel section, and the horizontal sliding track 36 is installed in the trapezoidal steel groove 41 on the end face of the tunnel secondary lining of the next tunnel section.

[0060] The third waterproof mechanism is arranged in the incision of the adjacent segmented tunnel and is arranged close to one side of the inner surface of the segmented tunnel; one side of the third waterproof mechanism is in close contact with the steel trough end plate 42 in the incision of the second tunnel lining 13 of the previous tunnel section, and the other side of the third waterproof mechanism is in close contact with the steel trough end plate 42 in the incision of the second tunnel lining 13 of the next tunnel section; in the present invention, the third waterproof mechanism adopts a water-stopping airbag 5; the water-stopping airbag 5 includes an inflatable airbag 51 and an inflating tube 54, the inflatable airbag 51 is constrained in the incision of the adjacent segmented tunnel and is located between the sliding connection mechanism 3 and the fourth waterproof mechanism; one end of the inflatable tube 54 is connected to the inflation and exhaust port of the inflatable airbag 51, and the other end extends to the inside of the segmented tunnel and is connected to the air source; a pressure gauge 52 and an inflation valve 53 are provided on the inflation tube 54.

[0061] The fourth waterproof mechanism is arranged at the incision of the adjacent segmented tunnel and is located on the inner surface of the segmented tunnel; one end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining 13 of the previous tunnel section, and the other end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining 13 of the next tunnel section; in the present invention, the fourth waterproof mechanism adopts the Ω waterstop 7; the Ω waterstop 7 is arranged along the incision of the adjacent segmented tunnel and placed on the inner surface of the second tunnel lining 13; one wing of the Ω waterstop 7 is fixedly connected to the inner surface of the second tunnel lining 13 of the previous tunnel section, and the other wing of the Ω waterstop 7 is fixedly connected to the inner surface of the second tunnel lining of the next tunnel section; an arc-shaped protrusion is arranged in the middle of the Ω waterstop 7, and the arc-shaped protrusion is arranged opposite to the incision of the adjacent segmented tunnel and is arranged facing the inner side of the segmented tunnel.

[0062] The right-angle waterproof plate 6 is symmetrically arranged at the incision of adjacent segmented tunnels and placed between the tunnel secondary lining 13 and the Ω waterstop 7; the right-angle waterproof plate 6 includes an L-shaped steel plate 61, a stiffening plate 62 and a waterproof pad 64; the L-shaped steel plate 61 is arranged at the right-angle end of the incision of the tunnel secondary lining 13, the long side of the L-shaped steel plate 61 is buried in the inner surface of the tunnel secondary lining 13, and the short side of the L-shaped steel plate 61 is buried in the end of the tunnel secondary lining 13; the stiffening plate 62 is vertically fixed on the long side of the L-shaped steel plate 61 and is arranged away from the short side of the L-shaped steel plate 61; one end of the stiffening plate 62 is fixedly connected to the long side of the L-shaped steel plate 61, and the other end extends into the tunnel secondary lining 13; the waterproof pad 64 is arranged on the outside of the long side of the L-shaped steel plate 61, one side of the waterproof pad 64 is tightly fixed to the long side of the L-shaped steel plate 61, and the other side is tightly fixed to the Ω waterstop 7.

[0063] A plurality of first grouting pipes 8 are evenly distributed in the previous segmented tunnel along the incisions of adjacent segmented tunnels, and a plurality of second grouting pipes 9 are evenly distributed in the next segmented tunnel along the incisions of adjacent segmented tunnels; and both the first grouting pipes 8 and the second grouting pipes 9 are inclined toward the incisions of adjacent segmented tunnels; one end of the first grouting pipe 8 is exposed from the inner surface of the second tunnel lining 13 of the previous segmented tunnel, and the other end sequentially penetrates the second tunnel lining 13 and the first tunnel lining 12 of the previous segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining of the previous tunnel; one end of the second grouting pipe 9 is exposed from the inner surface of the second tunnel lining 13 of the next segmented tunnel, and the other end sequentially penetrates the second tunnel lining 13 and the first tunnel lining 12 of the next segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining 12 of the next tunnel.

[0064] Construction method and joint protection principle:

[0065] Construction process:

[0066] During the construction of segmented tunnels, after the construction of the first lining of the tunnel is completed, the first and second waterproof mechanisms are constructed circumferentially on the inner surface of the first lining of the tunnel; during the construction of the second lining of the tunnel, a sliding connection mechanism is installed at a specific position at the cut section of the adjacent segmented tunnels so that it engages to connect the two segmented tunnels, and then the third waterproof mechanism is laid circumferentially; after the construction of the second lining of the tunnel is completed, a fourth waterproof mechanism is constructed on the inner surface of the second lining of the tunnel; after the overall construction is completed, the inflatable airbag is inflated through the inflation pipe, and the inflation valve is closed when the pressure gauge reaches the design pressure value.

[0067] Connector protection principle:

[0068] The joint device for segmented tunnels in ground fissure sites of the present invention realizes small-scale three-way deformation and rotational deformation of the segmented tunnel structure through the extension and retraction of the first connecting sleeve and the second connecting sleeve, the sliding of the middle pulley of the first connecting sleeve in the two first guide rods, the sliding of the pulley in the second connecting sleeve in the two second guide rods, and the rotation of the rolling bearings in the first connecting sleeve and the second connecting sleeve in the early stage of ground fissure activity, so that the segmented tunnel can adapt to the stratum deformation caused by the ground fissure; the engagement connection of the first bite hook and the second bite hook increases the integrity and structural strength of the segmented tunnel; the pressure gauge is used to monitor the pressure change of the inflatable airbag to judge the relative deformation direction of the lining on both sides of the segmented tunnel under the action of the ground fissure, and to make preparations for treatment in advance; when the activity of the ground fissure leads to When the segmented tunnel is greatly deformed, the first bite hook and the second bite hook in the sliding connection mechanism are disconnected, and the flexible structure of the Ω waterstop, the waterstop airbag and the Ω waterstop at the incision is used to realize flexible protection during large deformation; when the segmented tunnels on both sides of the incision have a large relative displacement, the inflatable airbag is deflated or inflated according to the increase or decrease in the pressure of the inflatable airbag, so that the internal pressure is maintained within the design range, and the grouting pipe is used for grouting reinforcement to maintain the protective performance of the joint; when the pressure gauge reading returns to zero, it indicates that the inflatable airbag is damaged and leaking, and the waterproof effect is reduced at this time, and it needs to be repaired and replaced in time, and the protective effect is monitored; in daily use and maintenance, the pressure gauge reading can be used to analyze the ground fissure activity and the deformation of the segmented tunnel joints, and protective measures can be taken in advance.

[0069] Example

[0070] As attached Figure 1-10 As shown, the present embodiment provides a joint device for a segmented tunnel in a ground fissure site, comprising a waterproof layer 1, an Ω-shaped waterstop 2, a sliding connection mechanism 3, two grooved steel plates 4, a water-stop airbag 5, a right-angle waterproof plate 6, an Ω waterstop 7, a plurality of first grouting pipes 8 and a plurality of second grouting pipes 9; the segmented tunnel in the ground fissure site adopts secondary lining support, and the lining concrete of the segmented tunnel comprises a first tunnel lining 12 and a second tunnel lining 13; in the present embodiment, the side close to the surface of the surrounding rock and soil is the outer side or the outer surface, the side close to the inside of the segmented tunnel is the inner side or the inner surface, the extension direction of the segmented tunnel is the axial direction of the segmented tunnel, the upper disk side tunnel is the upper tunnel section, and the lower disk side tunnel is the next tunnel section.

[0071] The waterproof layer 1 is laid between the first lining 12 and the second lining 13 of the tunnel along the axial direction of the segmented tunnel; and the water stop strip 2 is laid along the incision of the adjacent segmented tunnel and placed between the first lining 12 and the second lining 13 of the tunnel; the sliding connection mechanism 3 is arranged in the incision of the adjacent segmented tunnel and is located between the second waterproof mechanism and the third waterproof mechanism; one end of the sliding connection mechanism 3 is connected to the end face of the second lining 13 of the tunnel of the previous tunnel section, and the other end of the sliding connection mechanism 3 is connected to the end face of the second lining 13 of the tunnel of the next tunnel section; one of the grooved steel plates 4 is arranged between the sliding connection mechanism 3 and the end face of the incision of the second lining 13 of the tunnel of the previous tunnel section, and the other grooved steel plate 4 is arranged between the sliding connection mechanism 3 and the end face of the incision of the second lining 13 of the tunnel of the next tunnel section; the water stop air bag 5 is arranged in the incision of the adjacent segmented tunnel and is arranged close to one side of the inner surface of the segmented tunnel; one side of the water stop air bag 5 is connected to the upper The steel trough end plate 42 in the cutout of the tunnel secondary lining 13 of the tunnel section is in close contact, and the other side of the water-stop airbag 5 is in close contact with the steel trough end plate 42 in the cutout of the tunnel secondary lining 13 of the next tunnel section; the Ω waterstop 7 is arranged at the cutout of the adjacent segmented tunnel and is located on the inner surface of the segmented tunnel; one end of the Ω waterstop 7 is connected to the inner surface of the tunnel secondary lining 13 of the previous tunnel section, and the other end of the Ω waterstop 7 is connected to the inner surface of the tunnel secondary lining 13 of the next tunnel section; the right-angle waterproof plate 6 is symmetrically arranged at the cutout of the adjacent segmented tunnel and placed between the tunnel secondary lining 13 and the Ω waterstop 7; a number of first grouting pipes 8 are evenly distributed in the previous segmented tunnel along the cutout of the adjacent segmented tunnel, and a number of second grouting pipes 9 are evenly distributed in the next segmented tunnel along the cutout of the adjacent segmented tunnel; and the slurry outlets of the first grouting pipe 8 and the second grouting pipe 9 are both inclined toward the cutout of the adjacent segmented tunnel.

[0072] The joint device for segmented tunnels in ground fissure sites described in this embodiment realizes a rigid connection between the upper tunnel section and the lower tunnel section by setting a sliding connection mechanism at the incision of adjacent segmented tunnels, thereby effectively improving the overall stability of the segmented tunnel; it provides strength in the initial stage of deformation of the segmented tunnel caused by ground fissure activity, and can realize three-way deformation and rotational deformation to adapt when the deformation is large, and can be disconnected when the deformation is large; the waterproof layer 1, the Ω waterstop 2, the waterstop airbag 5 and the Ω waterstop 7 together form four waterproof mechanisms, which effectively improve the waterproof effect. The waterstop airbag 5 is filled with high-pressure gas, which can be inflated or deflated as the tunnel lining on both sides of the incision deforms to maintain the stability of the internal air pressure and ensure the stability of the waterproof function; the grouting pipe is used to grout the surrounding rock and soil during deformation to jointly protect the safety of the structure.

[0073] In this embodiment, the waterproof layer 1 adopts EVC waterproof board or acrylic spray film; wherein, when acrylic spray film is adopted, an acrylic spray film with a thickness of 2-3mm is applied between the first lining and the second lining of the tunnel, and is arranged horizontally along the extension direction of the tunnel; and one side of the shaped waterstop 2 is tightly arranged with the inner surface of the first lining 12 of the tunnel, and the other side is tightly arranged with the outer surface of the second lining 13 of the tunnel; and the shaped waterstop 2 is provided with a protrusion 21 on the side facing the second lining 13 of the tunnel, and the protrusion 21 is provided at the incision of the adjacent segmented tunnel; and one wing of the shaped waterstop 2 is fixedly connected to the outer surface of the second lining 13 of the tunnel of the previous tunnel section by a plurality of first fixing bolts 10, and the other wing of the shaped waterstop 2 is fixedly connected to the outer surface of the second lining 13 of the tunnel of the next tunnel section by a plurality of first fixing bolts 10.

[0074] The sliding connection mechanism 3 includes a vertical sliding rail 31, a first connecting sleeve 32, a first snap hook 33, a second snap hook 34, a second connecting sleeve 35 and a horizontal sliding rail 36; one side of the vertical sliding rail 31 is fixed to the end face of the second tunnel lining 13 of the previous tunnel section, and the other side of the vertical sliding rail 31 is slidably connected to one end of the first connecting sleeve 32; the other end of the first connecting sleeve 32 is connected to one end of the first snap hook 33, and the other end of the first snap hook 33 is snap-fixed to one end of the second snap hook 34; the other end of the second snap hook 34 is connected to one end of the second connecting sleeve 35, and the other end of the second connecting sleeve 35 is slidably connected to one side of the horizontal sliding rail 36, and the other side of the horizontal sliding rail 36 is fixed to the end face of the second tunnel lining 13 of the next tunnel section.

[0075] Among them, the sliding end of the first connecting sleeve 32 can slide freely along the diameter direction of the segmented tunnel in the vertical sliding track 31, and the sliding end of the second connecting sleeve 35 can slide freely along the diameter direction of the vertical segmented tunnel in the horizontal sliding track 36; the first bite hook 33 and the second bite hook 34 are engaged and fixed to achieve a rigid connection between the first connecting sleeve 32 and the second connecting sleeve 35.

[0076] One side of the vertical sliding track 31 is fixed to the end face of the second tunnel lining 13 of the previous tunnel section, and the other side of the vertical sliding track 31 is slidably connected to one end of the first connecting sleeve 32; the other end of the first connecting sleeve 32 is connected to one end of the first snap hook 33, and the other end of the first snap hook 33 is snap-fixed with one end of the second snap hook 34; the other end of the second snap hook 34 is connected to one end of the second connecting sleeve 35, and the other end of the second connecting sleeve 35 is slidably connected to one side of the horizontal sliding track 36, and the other side of the horizontal sliding track 36 is fixed to the end face of the second tunnel lining 13 of the next tunnel section; the sliding end of the first connecting sleeve 32 can slide freely in the vertical sliding track 31 along the diameter direction of the segmented tunnel, and the sliding end of the second connecting sleeve 35 can slide freely in the horizontal sliding track 36 along the diameter direction of the vertical segmented tunnel.

[0077] In this embodiment, a grooved steel plate 4 is arranged between the vertical sliding track 31 and the end face of the tunnel secondary lining 13 of the previous tunnel section; another grooved steel plate 4 is arranged between the horizontal sliding track 36 and the end face of the tunnel secondary lining 13 of the next tunnel section; the grooved steel plate 4 includes a trapezoidal steel groove 41 and a steel groove end plate 42, and the steel groove end plate 42 is fixed on the cut end face of the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section; the trapezoidal steel groove 41 is arranged on the steel groove end plate 42 and is arranged close to one side of the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section; one end of the trapezoidal steel groove 41 is embedded in the It is arranged in the tunnel secondary lining 13 of the previous tunnel section or the next tunnel section, and the other side is connected with the steel groove end plate 42; the vertical sliding track 31 is installed in the trapezoidal steel groove 41 on the end face of the tunnel secondary lining 13 of the previous tunnel section, and the horizontal sliding track 36 is installed in the trapezoidal steel groove 41 on the end face of the tunnel secondary lining 13 of the next tunnel section; first fixing holes 43 are respectively arranged at both ends of the trapezoidal steel groove 41, and second fixing holes 44 are arranged on the side wall of the trapezoidal steel groove 41; the first fixing hole 43 and the second fixing hole 44 are used to fix the vertical sliding track 31 or the horizontal sliding track 36.

[0078] The vertical sliding track 31 includes a first slide groove 301 and two first guide rods 302; the first slide groove 301 is fixed on the inner side of the cutout end face of the second tunnel lining 13 of the previous tunnel section, the first slide groove 301 is a rectangular box-shaped structure with one side open, and the open side of the first slide groove 301 is arranged facing the cutout of the adjacent segmented tunnel; the two first guide rods 302 are arranged in parallel on the open side of the first slide groove 301, and the axis of the first guide rod 302 is consistent with the diameter direction of the segmented tunnel; the short sides of the first slide groove 301 are respectively provided with first bayonet holes 303, and the two ends of the first guide rod 302 are respectively passed through the first bayonet holes 303 of the first slide groove 301, and are fixedly arranged in the first fixing holes 43 of one of the trapezoidal steel grooves 41; the first slide groove 301 is fixedly connected to the second fixing hole 44 on one of the trapezoidal steel grooves 41 by a fixing bolt; the sliding end of the first connecting sleeve 32 is slidably arranged between the two first guide rods 302, and can slide freely along the axis direction of the first guide rod 302.

[0079] The horizontal sliding track 36 includes a second slide groove and two second guide rods; the second slide groove is fixed on the inner side of the cutout end face of the second lining 13 of the next tunnel section, and the second slide groove is a rectangular box-shaped structure with one side open, and the open side of the second slide groove is arranged facing the cutout of the adjacent segmented tunnel; the two second guide rods are arranged in parallel on the open side of the second slide groove, and the axis of the second guide rod is perpendicular to the diameter direction of the segmented tunnel; the short sides of the second slide groove are respectively provided with second bayonet holes, and the two ends of the second guide rod are respectively passed through the second bayonet holes of the second slide groove, and are fixedly arranged in the first fixing hole 43 of another trapezoidal steel groove 41; the second slide groove is fixedly connected to the second fixing hole 44 on the other trapezoidal steel groove 41 by another fixing bolt; the sliding end of the second connecting sleeve 35 is slidably arranged between the two second guide rods, and can slide freely along the axial direction of the second guide rod.

[0080] In this embodiment, after the first guide rod 302 or the second guide rod passes through the first clip or the second clip of the first slide groove 301 or the second slide groove, it is fixedly connected to the first fixing hole 43 of the trapezoidal steel groove 41, and the first slide groove 301 or the second slide groove is connected to the second fixing hole of the trapezoidal channel steel 41 by fixing bolts, respectively, thereby achieving the fixed connection between the first guide rod 302 or the second guide rod, the first slide groove 301 or the second slide groove and the trapezoidal steel groove 41, thereby avoiding relative sliding among the three.

[0081] The first connecting sleeve 32 and the second connecting sleeve 35 have the same structure, and respectively include an outer sleeve 304, a first inner sleeve 305, a second inner sleeve 306, a first rolling bearing 310, a second rolling bearing 311 and a pulley 312; one end of the first inner sleeve 305 is connected to the first bite hook 33 or the second bite hook 34, and the other end of the first inner sleeve 305 is inserted into one end of the outer sleeve 304; wherein a first rolling bearing 310 is arranged between the first inner sleeve 305 and the outer sleeve 304; the first rolling bearing 311 is connected to the first bite hook 33 or the second bite hook 34; The inner ring of the bearing 310 is fixedly connected to the outer wall of the first inner sleeve 305, and the outer ring of the first rolling bearing 310 is fixedly connected to the inner wall of one end of the outer sleeve 304; one end of the second inner sleeve 306 is inserted into the other end of the outer sleeve 304, and the other end of the second inner sleeve 306 is fixed to the pulley 312; wherein a second rolling bearing 311 is arranged between the second inner sleeve 306 and the outer sleeve 304; the inner ring of the second rolling bearing 311 is fixedly connected to the outer wall of the second inner sleeve 306, and the second rolling bearing 311 is fixedly connected to the outer wall of the second inner sleeve 306. The outer ring of the bearing 311 is fixedly connected to the inner wall of the other end of the outer sleeve 304; a plurality of elastic retaining pins 309 are arranged on the outer walls of the first inner sleeve 305 and the second inner sleeve 306, and the plurality of elastic retaining pins 309 are arranged circumferentially and evenly at intervals on the outer circumferential surface of the first inner sleeve 305 or the second inner sleeve 306; a plurality of first positioning holes 307 are arranged circumferentially at one end of the outer sleeve 304, and a plurality of second positioning holes 308 are arranged circumferentially at the other end; some of the elastic retaining pins on the first inner sleeve 305 are arranged in cooperation with the outer sleeve 30 4, part of the elastic retaining pins on the second inner sleeve 306 are matched and arranged in the second positioning hole 308 of the outer sleeve 304; the end face of the pulley 312 is fixedly connected to the end of the second inner sleeve 306, and the rotation axis of the pulley 312 coincides with the axis of the second inner sleeve 306; a U-shaped groove is provided on the outer circumference of the pulley 312, one side of the U-shaped groove is matched and connected with one of the first guide rods or one of the second guide rods, and the other side of the U-shaped groove is matched and connected with the other first guide rod or the other second guide rod.

[0082] In this embodiment, the sliding connection mechanism 3 is circumferentially distributed at preset positions at adjacent tunnel cutouts; wherein the U-shaped slide groove of the pulley 312 matches the size of the first guide rod 302 or the second guide rod; the diameter of the first guide rod 302 matches the diameter of the first bayonet 303, and the diameter of the second guide rod matches the diameter of the second bayonet; the length of the first guide rod 302 matches the vertical height of the trapezoidal steel groove 41, and the length of the second guide rod matches the horizontal width of the trapezoidal steel groove; the diameter of the first inner sleeve 305 or the second inner sleeve 306 is smaller than the outer sleeve 306. The diameter of the sleeve 304, the first inner sleeve 305 or the second inner sleeve 306 and the outer sleeve 304 can be nested with each other to produce axial telescopic deformation; the first positioning hole 307 and the second positioning hole 308 are respectively located at the two end edges of the outer sleeve 304, and their number and size are respectively matched with the number and size of the elastic retaining nails 309 on the first inner sleeve 305 or the second inner sleeve 306; the elastic retaining nail 309 is provided with a spring to realize pressing deformation; the part of the elastic retaining nail 309 that cooperates with the first positioning hole 307 or the second positioning hole 308 is connected After the elastic retaining nail returns to its original shape, it is higher than the outer surface of the outer sleeve 304, thereby realizing that the first inner sleeve 305 or the second inner sleeve 306 is relatively fixed to the outer sleeve 304, and the remaining elastic retaining nail 309 is compressed in the outer sleeve 304 or directly exposed; the first rolling bearing 310 is arranged at one end of the outer sleeve 304, and the second rolling bearing 311 is arranged at the other end of the outer sleeve 304, which is respectively used for the outer sleeve 304 to connect with the first inner sleeve 305 or the second inner sleeve 306; the first rolling bearing 310 or the second rolling bearing The outer ring diameter of the movable bearing 311 matches the diameter of the outer sleeve 304, and the inner ring diameter of the first rolling bearing 310 or the second rolling bearing 311 matches the diameter of the first inner sleeve 305 or the second inner sleeve 306, thereby realizing the relative rotational connection between the first inner sleeve 305 or the second inner sleeve 306 and the outer ring sleeve 304; a plurality of balls are arranged in the first rolling bearing 310 or the second rolling bearing 311 to reduce the friction resistance during rotational deformation; thereby jointly realizing the three-way displacement deformation and rotational deformation of the sliding connection mechanism 3.

[0083] In this embodiment, the steel trough end plate 42 is parallel to the incision direction and is fixed to the incision end surface of the tunnel secondary lining 13; the vertical height or horizontal width of the trapezoidal steel trough 41 matches the length of the first guide rod 302 or the second guide rod respectively; the horizontal sliding rail 36 and the vertical sliding rail 31 are fixed through the fixing holes thereon respectively to prevent relative sliding; the size of the steel trough end plate 42 matches the length of the incision, and is welded and fixed to the trapezoidal steel trough 41 embedded in the tunnel secondary lining 13, thereby increasing the strength and stability of the overall structure.

[0084] The water-stop airbag 5 includes an inflatable airbag 51 and an inflation tube 54. The inflatable airbag 51 is constrained in the incision of the adjacent segmented tunnel and is located between the sliding connection mechanism 3 and the fourth waterproof mechanism; one end of the inflation tube 54 is connected to the inflation and exhaust port of the inflatable airbag 51, and the other end extends to the inside of the segmented tunnel and is connected to the air source; the inflation tube 54 is provided with a pressure gauge 52 and an inflation valve 53.

[0085] In this embodiment, the pressure gauge 52 and the inflation valve 53 are located inside the segmented tunnel and are interconnected through the inflation tube 54; the inflatable airbag 51 is made of high-elastic rubber of a preset thickness, and is constrained in the incision after inflation, and the two sides are tightly fitted with the two steel groove end plates 42 to form a waterproof structure; the inflation and exhaust ports of the inflatable airbag 51 are connected to the inflation tube 54 and led out to the inside of the segmented tunnel; by arranging the pressure gauge 52 and the inflation valve 53 on the inflation tube, it is convenient to monitor the pressure inside the inflatable airbag 51 and to inflate or deflate through the inflation valve 53.

[0086] The right-angle waterproof plate 6 is symmetrically arranged at the incision of adjacent segmented tunnels and placed between the tunnel secondary lining 13 and the Ω waterstop 7; the right-angle waterproof plate 6 includes an L-shaped steel plate 61, a stiffening plate 62, a bolt hole 63 and a waterproof pad 64; the L-shaped steel plate 61 is arranged at the right-angle end of the incision of the tunnel secondary lining 13, the long side of the L-shaped steel plate 61 is buried in the inner surface of the tunnel secondary lining 13, and the short side of the L-shaped steel plate 61 is buried in the end of the tunnel secondary lining 13; the stiffening plate 62 is vertically fixed on the long side of the L-shaped steel plate 61 and is arranged away from the short side of the L-shaped steel plate 61; one end of the stiffening plate 62 is fixedly connected to the long side of the L-shaped steel plate 61, and the other end extends into the tunnel secondary lining 13; the waterproof pad 64 is arranged on the outside of the long side of the L-shaped steel plate 61, one side of the waterproof pad 64 is tightly fixed to the long side of the L-shaped steel plate 61, and the other side is tightly fixed to the Ω waterstop 7.

[0087] In this embodiment, the L-shaped steel plate 61 is located at the right-angle end of the second lining 13 of the tunnel and is placed in the concrete lining. The stiffening plate 62 is vertically fixed to the long side of the L-shaped steel plate 61. The bolt holes 63 are distributed on the long side of the L-shaped steel plate 61. The waterproof pad 64 is arranged on the outer side of the long side of the L-shaped steel plate 61 and the inner side of the Ω waterstop 7. The L-shaped steel plate 61 adopts a steel plate of preset thickness, and the waterproof pad 64 is fixed to the two ends of the incision through the second fixing bolts 11 and the bolt holes 63, and the internal steel plate is reinforced again to strengthen the waterproofing of the end.

[0088] The Ω waterstop 7 is arranged along the incision of the adjacent segmented tunnel and placed on the inner surface of the tunnel secondary lining 13; one wing of the Ω waterstop 7 is fixedly connected to the inner surface of the tunnel secondary lining 13 of the previous tunnel section, and the other wing of the Ω waterstop 7 is fixedly connected to the inner surface of the tunnel secondary lining 13 of the next tunnel section; an arc-shaped protrusion is arranged in the middle of the Ω waterstop 7, and the arc-shaped protrusion is arranged opposite to the incision of the adjacent segmented tunnel and is arranged facing the inner side of the segmented tunnel.

[0089] In this embodiment, an interface through hole 71 is provided at the arc-shaped protrusion of the Ω waterstop 7, and the inflation tube 54 passes through the interface through hole 71; the two wings of the Ω waterstop 7 are respectively provided with circular plate pads 72, and the second fixing bolt 11 passes through the circular plate pads 72 to fix the Ω waterstop 7 to the inner surface of the second lining 13 of the tunnel.

[0090] In this embodiment, the Ω waterstop 7 is made of high-elastic rubber of a preset thickness, the interface through hole 71 is a circular hole, the aperture of the interface through hole 71 matches the diameter of the inflation tube 54, and a waterproof sealant is arranged between the inflation tube 54 and the interface through hole 71 to avoid water leakage; the circular plate cushion 72 is a steel circular plate, and an opening is arranged in the middle of the circular plate cushion 72, and the opening matches the diameter of the second fixing bolt 11, so that the Ω waterstop 7 can achieve uniform force through the circular plate cushion 72 when fixed and prevent the existence of sharp corners from causing damage to the rubber; the two ends of the Ω waterstop 7 are fixed to the waterproof pad 64 through the circular plate cushion 72 and the second fixing bolt 11 to form the last waterproof line.

[0091] A plurality of first grouting pipes 8 are evenly distributed in the previous segmented tunnel along the incisions of adjacent segmented tunnels, and a plurality of second grouting pipes 9 are evenly distributed in the next segmented tunnel along the incisions of adjacent segmented tunnels; and both the first grouting pipes 8 and the second grouting pipes 9 are inclined toward the incisions of adjacent segmented tunnels; one end of the first grouting pipe 8 is exposed from the inner surface of the second tunnel lining 13 of the previous segmented tunnel, and the other end sequentially penetrates the second tunnel lining 13 and the first tunnel lining 12 of the previous segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining 12 of the previous tunnel; one end of the second grouting pipe 9 is exposed from the inner surface of the second tunnel lining 13 of the next segmented tunnel, and the other end sequentially penetrates the second tunnel lining 13 and the first tunnel lining 12 of the next segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining 12 of the next tunnel.

[0092] The joint device described in this embodiment is used to install various components in sequence during the construction of the segmented tunnel according to the progress of tunnel construction, rigidly connect the bite hooks of the sliding connection mechanism on both sides of the incision, and then inflate the water-stop airbag. After the pressure in the airbag reaches the design requirement according to the feedback of the pressure gauge, the inflation valve is closed; when in use, through the self-expansion and contraction of the first connecting sleeve and the second connecting sleeve in the sliding connection mechanism, the sliding of the middle pulley of the first connecting sleeve in the two first guide rods, the sliding of the pulley in the second connecting sleeve in the two second guide rods, and the rotation of the rolling bearings in the first connecting sleeve and the second connecting sleeve, the segmented tunnel structure is deformed in a small range in three directions and rotationally, so that the segmented tunnel can adapt to the structural deformation caused by the deformation of the ground fissures; at the same time, the rigid bite connection still exists, so that the tunnel can adapt to the deformation of the ground caused by the ground fissures while maintaining a certain strength to resist the deformation; the pressure change (compression or expansion) of the water-stop airbag is monitored by a barometer to judge the segmented tunnel The relative deformation direction (close or far) of the linings on both sides under the activity of the ground fissures is determined, and relevant treatment preparations are made; when the activity of the ground fissures causes a large deformation of the tunnel, the bite hook in the rigidly connected sliding device is disconnected, and the deformation of the flexible structures such as the shaped waterstop, waterstop airbag and Ω waterstop in the incision is used to achieve flexible protection; when the relative displacement on both sides of the incision is large, the deflation or inflation operation is performed according to the pressure increase or decrease of the inflatable airbag fed back by the pressure gauge, so that the internal pressure is kept within the design range, and at the same time, the grouting pipe is used to grout the de-aired area between the bottom of the structure and the soil body caused by the ground fissure activity and the surrounding rock at other locations, so as to jointly maintain the joint protection performance; when the pressure gauge reading returns to zero, it indicates that the inflatable airbag is damaged and leaking, and the waterproof effect is reduced at this time, and it needs to be repaired and replaced in time, and then the protection effect should be monitored in stages; in daily use and maintenance inspections, the changes in the pressure gauge readings can be used to analyze the ground fissure activity and the deformation of the segmented tunnel joint structure, and to prepare for protection in advance.

[0093] In this embodiment, the Ω waterstop and the Ω waterstop are both made of high-elastic rubber, and are respectively axially arranged between the first lining and the second lining of the tunnel incision, and at the incision inside the tunnel; the thickness of the Ω waterstop or the Ω waterstop is 10-15mm, and the width is not less than 300mm, which can completely cover the width of the tunnel incision and leave a margin on both sides, and are fastened with fixing bolts at both ends.

[0094] The sliding connection mechanism is circumferentially distributed at the arch crown, arch shoulder, arch waist, arch foot and arch bottom of the second lining end face of the tunnel; the first guide rod and the second guide rod are both two steel cylindrical rods as rails with a diameter of 1-2 cm and a spacing of 3-5 cm. The length is determined according to the size of the trapezoidal steel groove to ensure that the length of the steel cylindrical rod is embedded in the fixing hole of the trapezoidal steel groove; the first slide groove or the second slide groove is a rectangular box with one side open surrounded by 5 steel sheets; wherein the size characteristics of the first slide groove are: height × width × thickness = 20 cm × 12 cm × 5 cm, and the size characteristics of the second slide groove are: length × height × thickness = 20 cm × 12 cm × 5 cm, and the first slide groove or the second slide groove is respectively provided with a circular bayonet with a diameter of 1-2 cm on its short side and matched with the diameter of the guide rod, so that the two ends of the guide rod can pass through the bayonet for positioning.

[0095] The outer sleeve is a steel hollow cylindrical tube with a diameter of 10 cm, a thickness of 2 cm and a length of 5 cm. A circle of 12 positioning holes are evenly arranged in each circumferential direction at a position 3-4 cm close to the edge on both sides; the first inner sleeve or the second inner sleeve is a steel hollow cylindrical tube with a diameter of 8 cm, a thickness of 2 cm and a length of 10 cm. A number of elastic retaining nails with an axial spacing of 1 cm and an circumferential spacing of 2 cm are evenly arranged on the outer side of the tube wall; the size of the elastic retaining nails matches the size of the positioning holes of the outer sleeve; the first rolling bearing or the second rolling bearing is a steel ring with a thickness of 2 cm, an outer diameter of 10 cm and an inner diameter of 8 cm, and the sizes of the outer sleeve and the inner sleeve match each other; the pulley adopts a steel U-shaped pulley with a diameter slightly larger than the spacing between the two first guide rods or the two second guide rods. The width of the pulley groove matches the diameter of the track, which is about 1-2 cm, and can be embedded between the two tracks and slide.

[0096] The trapezoidal steel trough is made of 2-3cm thick steel plate. The trapezoidal steel trough is embedded in the secondary lining of the tunnel. Two fixing holes are set at the top, bottom and inside. The steel trough end plate is made of 5cm thick steel plate. The length of the steel trough end plate is consistent with the thickness of the secondary lining of the tunnel. It fits the concrete parallel to the incision direction and is welded to the edge of the trapezoidal steel trough.

[0097] The inflatable airbag is a hollow sphere made of high-elastic rubber with a wall thickness of 0.5-1 cm. The lower part of the inflatable airbag is connected to a rubber inflation tube with a diameter of 0.5 cm. The tail end of the inflation tube is placed inside the tunnel and is equipped with a pressure gauge and an inflation valve.

[0098] The L-shaped steel plate is made of a steel plate with a thickness of 2-3cm and a length greater than the size of the incision in the tunnel. It is set at a right angle to the incision and placed inside the concrete lining; the stiffening plate is made of a steel plate with a thickness of 2-3cm, and the short side of the stiffening plate is vertically welded to the long side of the L-shaped steel plate; there are 2 fixing bolts on each of the long sides of the L-shaped steel plate on both sides of the incision; the waterproof pad is made of a rubber pad with a thickness of 1-2cm, which is set on the outside of the L-shaped steel plate, i.e., at both ends of the incision inside the tunnel, and fixed with bolts.

[0099] The diameter of the interface through hole located in the arc-shaped raised part of the Ω waterstop belt matches the diameter of the inflation tube, which is about 0.5 cm. The inflation tube passes through it, and the joint is sealed with waterproof glue; the circular plate cushion is a rubber pad with a thickness of 0.5-1 cm, a diameter of 5 cm and an iron sheet. Two are set on each side of the waterstop belt. The circular plate cushion layer, Ω waterstop belt and waterproof pad are fixed in sequence on both sides of the incision on the inner side of the second lining of the tunnel with bolts.

[0100] The grouting pipes are reusable steel pipes with a length greater than the total thickness of the tunnel lining, an outer diameter of 2-3cm and an inner diameter of 0.8-1.6cm. They are arranged in the lining on both sides of the incision at an inclination of 40-45° toward the direction of the segmented incision, and the number of grouting pipes in the upper tunnel section exceeds that of the lower tunnel section.

[0101] In the present invention, a first waterproof mechanism is formed by arranging a waterproof layer between the first tunnel lining and the second tunnel lining; a second waterproof mechanism is formed by using a high-elastic rubber Ω-shaped waterstop strip located between the first tunnel lining and the second tunnel lining; a highly elastic inflatable waterstop airbag is arranged as a third waterproof mechanism, and the air pressure inside the inflatable airbag can be adjusted according to the pressure gauge on the inflation pipe introduced into the tunnel, and timely monitoring is performed; a highly elastic rubber Ω waterstop strip is arranged on both sides of the incision inside the tunnel, and a right-angle waterproof plate is used to form a fourth waterproof mechanism; the waterproof device composed of the above four waterproof mechanisms can achieve a good waterproof effect; in addition, the use of horizontal sliding tracks and vertical sliding tracks can enable the segmented tunnel structure to achieve a certain degree of waterproofing on both sides when the ground fissure is active. The invention can prevent the relative deformation of horizontal and vertical directions; adopt the inner and outer sleeves with rolling bearings, which are connected with the sliding track, and can provide axial and rotational deformation during horizontal and vertical deformation; set the bite hooks to connect the linings on both sides of the incision to form a whole, which greatly increases the strength of the overall structure, so that it can use the structural strength to resist small deformation, adapt to large deformation, and disconnect when large deformation occurs, thus protecting the safety of the segmented tunnel joint structure to the maximum extent; it can be used for the protection of underground projects such as urban subway tunnels in ground fissure sites, with good waterproof effect, high strength and controllability, sensitive deformation feedback, convenient monitoring and maintenance, and high application value for the construction and maintenance of tunnel projects, and can provide guidance for the protection of subway segmented tunnel projects in ground fissure sites.

[0102] The joint device described in the present invention can connect the segmented tunnel structure into a whole with near rigidity when the deformation is small, thereby enhancing the ability of the structure to resist deformation; when the deformation is large, the sliding device can realize three-way deformation and rotational deformation, so that the structure can produce a certain range of relative deformation to adapt; when the deformation is large, the connecting joint is disconnected to prevent the tunnel lining joint from being damaged due to deformation; the four waterproof mechanisms in the joint can achieve a good waterproof effect, and the deformation of the ground fissures and even the structure can be analyzed by detecting the air pressure change in the water-stop air ring, and the waterproof effect of the joint when it is deformed can be maintained by inflation or deflation; during daily maintenance, the pressure gauge can also be used to judge whether the air ring is damaged and take countermeasures in advance; compared with the existing segmented tunnel joints, the safety, waterproof effect, strength and controllability of the joint can be greatly improved, the sensitivity of deformation feedback and the convenience of monitoring and maintenance can be achieved, and guidance can be provided for the protection of subway segmented tunnel projects in ground fissure sites.

[0103] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A joint device for segmented tunnels in ground fissure sites, characterized in that: The invention comprises a first waterproof mechanism, a second waterproof mechanism, a sliding connection mechanism (3), a third waterproof mechanism and a fourth waterproof mechanism; the first waterproof mechanism is arranged between a first tunnel lining (12) and a second tunnel lining (13) along the axial direction of the segmented tunnel; the second waterproof mechanism is arranged at the incision of the adjacent segmented tunnel, one end of the second waterproof mechanism is connected to the outer surface of the second tunnel lining (13) of the previous tunnel section, and the other end of the second waterproof mechanism is connected to the outer surface of the second tunnel lining (13) of the next tunnel section; the third waterproof mechanism is arranged at the adjacent segmented tunnel. The third waterproof mechanism is arranged in the cutout of the tunnel and close to one side of the inner surface of the segmented tunnel; one side of the third waterproof mechanism is in close contact with the cutout end surface of the second tunnel lining (13) of the previous tunnel section, and the other side of the third waterproof mechanism is in close contact with the end surface of the second tunnel lining of the next tunnel section; the fourth waterproof mechanism is arranged at the cutout of the adjacent segmented tunnel and is located on the inner surface of the segmented tunnel; one end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining (13) of the previous tunnel section, and the other end of the fourth waterproof mechanism is connected to the inner surface of the second tunnel lining (13) of the next tunnel section; The sliding connection mechanism (3) is arranged at the incision of adjacent segmented tunnels and is located between the second waterproof mechanism and the third waterproof mechanism; the sliding connection mechanism (3) comprises a vertical sliding track (31), a first connecting sleeve (32), a first snap hook (33), a second snap hook (34), a second connecting sleeve (35) and a horizontal sliding track (36); one side of the vertical sliding track (31) is fixed to the end face of the second tunnel lining (13) of the previous tunnel section, the other side of the vertical sliding track (31) is slidably connected to one end of the first connecting sleeve (32), the other end of the first connecting sleeve (32) is connected to one end of the first snap hook (33), and the first The other end of the snap hook (33) is snapped and fixed with one end of the second snap hook (34), the other end of the second snap hook (34) is connected to one end of the second connecting sleeve (35), the other end of the second connecting sleeve (35) is slidably connected to one side of the horizontal sliding track (36), and the other side of the horizontal sliding track (36) is fixed to the end face of the second tunnel lining (13) of the next tunnel section; wherein the sliding end of the first connecting sleeve (32) can slide freely in the vertical sliding track (31) along the diameter direction of the segmented tunnel, and the sliding end of the second connecting sleeve (35) can slide freely in the horizontal sliding track (36) along the diameter direction of the vertical segmented tunnel; The third waterproof mechanism adopts a water-stopping airbag (5); the water-stopping airbag (5) comprises an inflatable airbag (51) and an inflating tube (54); the inflatable airbag (51) is constrained in the cutout of the adjacent segmented tunnel and is located between the sliding connection mechanism (3) and the fourth waterproof mechanism; one end of the inflatable airbag (54) is connected to the inflating and exhausting port of the inflatable airbag (51), and the other end extends to the inside of the segmented tunnel and is connected to the air source; the inflatable airbag (54) is provided with a pressure gauge (52) and an inflating valve (53); The vertical sliding track (31) comprises a first sliding groove (301) and two first guide rods (302); the first sliding groove (301) is fixed on the cut end face of the second lining (13) of the previous tunnel section, the first sliding groove (301) is a rectangular box-shaped structure with one side open, and the open side of the first sliding groove (301) is arranged facing the cut of the adjacent segmented tunnel; the two first guide rods (302) are arranged in parallel on the open side of the first sliding groove (301), and the axis of the first guide rod (302) is consistent with the diameter direction of the segmented tunnel; the sliding end of the first connecting sleeve (32) is slidably arranged between the two first guide rods (302), and can slide freely along the axis direction of the first guide rod (302); The horizontal sliding track (36) comprises a second slide groove and two second guide rods; the second slide groove is fixed on the inner side of the cut end surface of the second tunnel lining (13) of the next tunnel section, the second slide groove is a rectangular box-shaped structure with one side open, and the open side of the second slide groove is arranged facing the cut of the adjacent segmented tunnel; the two second guide rods are arranged in parallel on the open side of the second slide groove, and the axis of the second guide rod is perpendicular to the diameter direction of the segmented tunnel; the sliding end of the second connecting sleeve (35) is slidably arranged between the two second guide rods and can slide freely along the axis direction of the second guide rod; The first connecting sleeve (32) and the second connecting sleeve (35) have the same structure, and respectively comprise an outer sleeve (304), a first inner sleeve (305), a second inner sleeve (306), a first rolling bearing (310), a second rolling bearing (311) and a pulley (312); One end of the first inner sleeve (305) is connected to the first snap hook (33) or the second snap hook (34), and the other end of the first inner sleeve (305) is inserted into one end of the outer sleeve (304); wherein a first rolling bearing (310) is arranged between the first inner sleeve (305) and the outer sleeve (304); the inner ring of the first rolling bearing (310) is fixedly connected to the outer wall of the first inner sleeve (305), and the outer ring of the first rolling bearing (310) is fixedly connected to the inner wall of one end of the outer sleeve (304); One end of the second inner sleeve (306) is inserted into the other end of the outer sleeve (304), and the other end of the second inner sleeve (306) is fixed to the pulley (312); wherein a second rolling bearing (311) is provided between the second inner sleeve (306) and the outer sleeve (304); the inner ring of the second rolling bearing (311) is fixedly connected to the outer wall of the second inner sleeve (306), and the outer ring of the second rolling bearing (311) is fixedly connected to the inner wall of the other end of the outer sleeve (304); A plurality of elastic retaining pins (309) are arranged on the outer side walls of the first inner sleeve (305) and the second inner sleeve (306), and the plurality of elastic retaining pins (309) are evenly arranged along the outer circumferential surface of the first inner sleeve (305) or the second inner sleeve (306); a plurality of first positioning holes (307) are arranged at one end of the outer sleeve (304), and a plurality of second positioning holes (308) are arranged at the other end; some of the elastic retaining pins on the first inner sleeve (305) are matched and arranged in the first positioning holes (307) of the outer sleeve (304), and some of the elastic retaining pins on the second inner sleeve (306) are matched and arranged in the second positioning holes (308) of the outer sleeve (304); The end surface of the pulley (312) is fixedly connected to the end of the second inner sleeve (306), and the rotation axis of the pulley (312) coincides with the axis of the second inner sleeve (306); a U-shaped slide groove is provided on the outer circumference of the pulley (312), one side of the U-shaped slide groove is matched with one of the first guide rods or one of the second guide rods, and the other side of the U-shaped slide groove is matched with the other first guide rod or the other second guide rod.

2. A joint device for segmented tunnels in ground fissures according to claim 1, characterized in that: The first waterproof mechanism adopts a waterproof layer (1); the waterproof layer (1) is laid along the axial direction of the segmented tunnel between the first tunnel lining (12) and the second tunnel lining (13); wherein the waterproof layer (1) adopts an EVC waterproof board or an acrylic spray film.

3. A joint device for segmented tunnels in ground fissures according to claim 1, characterized in that: The second waterproof mechanism adopts a shaped water stop strip (2); the shaped water stop strip (2) is arranged along the cutout of the adjacent segmented tunnels and is placed between the first tunnel lining (12) and the second tunnel lining (13); one side of the shaped water stop strip (2) is arranged in close contact with the inner surface of the first tunnel lining (12), and the other side is arranged in close contact with the outer surface of the second tunnel lining (13); The shaped water stop strip (2) is provided with a protrusion (21) on the side facing the tunnel secondary lining (13), and the protrusion (21) is provided at the cutout of the adjacent segmented tunnel; one wing of the shaped water stop strip (2) is fixedly connected to the outer surface of the tunnel secondary lining (13) of the previous tunnel section, and the other wing of the shaped water stop strip (2) is fixedly connected to the outer surface of the tunnel secondary lining (13) of the next tunnel section.

4. A joint device for segmented tunnels in ground fissures according to claim 1, characterized in that: The fourth waterproof mechanism adopts an Ω waterstop (7); the Ω waterstop (7) is arranged along the incision of the adjacent segmented tunnel and is placed on the inner surface of the tunnel secondary lining (13); one wing of the Ω waterstop (7) is fixedly connected to the inner surface of the tunnel secondary lining (13) of the previous tunnel section, and the other wing of the Ω waterstop (7) is fixedly connected to the inner surface of the tunnel secondary lining (13) of the next tunnel section; an arc-shaped protrusion is arranged in the middle of the Ω waterstop (7), and the arc-shaped protrusion is arranged opposite to the incision of the adjacent segmented tunnel and is arranged facing the inner side of the segmented tunnel.

5. A joint device for segmented tunnels in ground fissures according to claim 4, characterized in that: It also includes a right-angle waterproof plate (6), which is symmetrically arranged at the cutouts of adjacent segmented tunnels and placed between the tunnel secondary lining (13) and the Ω water stop strip (7); The right-angle waterproof plate (6) comprises an L-shaped steel plate (61), a stiffening plate (62) and a waterproof pad (64); the L-shaped steel plate (61) is arranged at the right-angle end of the cutout of the tunnel secondary lining (13), the long side of the L-shaped steel plate (61) is buried in the inner surface of the tunnel secondary lining (13), and the short side of the L-shaped steel plate (61) is buried in the end of the tunnel secondary lining (13); the stiffening plate (62) is vertically fixed on the long side of the L-shaped steel plate (61) and is arranged away from the short side of the L-shaped steel plate (61); One end of the stiffening plate (62) is fixedly connected to the long side of the L-shaped steel plate (61), and the other end extends into the secondary lining (13) of the tunnel; the waterproof pad (64) is arranged outside the long side of the L-shaped steel plate (61), one side of the waterproof pad (64) is tightly fixed to the long side of the L-shaped steel plate (61), and the other side is tightly fixed to the Ω water stop strip (7).

6. A joint device for segmented tunnels in ground fissures according to claim 1, characterized in that: It also includes a plurality of first grouting pipes (8) and a plurality of second grouting pipes (9); the plurality of first grouting pipes (8) are evenly distributed in the previous segmented tunnel along the cutouts of adjacent segmented tunnels, and the plurality of second grouting pipes (9) are evenly distributed in the next segmented tunnel along the cutouts of adjacent segmented tunnels; and the first grouting pipes (8) and the second grouting pipes (9) are both arranged to be inclined toward the cutouts of adjacent segmented tunnels; One end of the first grouting pipe (8) is exposed on the inner surface of the second tunnel lining (13) of the previous segmented tunnel, and the other end sequentially penetrates the second tunnel lining (13) and the first tunnel lining (12) of the previous segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining (12) of the previous tunnel; one end of the second grouting pipe (9) is exposed on the inner surface of the second tunnel lining (13) of the next segmented tunnel, and the other end sequentially penetrates the second tunnel lining (13) and the first tunnel lining (12) of the next segmented tunnel, and extends to the outside of the outer surface of the first tunnel lining (12) of the next tunnel.

7. The construction method of a joint device for a segmented tunnel in a ground fissure site according to claim 1, characterized in that: The following steps are involved: During the construction of segmented tunnels, after the construction of the first lining of the tunnel is completed, the first and second waterproof mechanisms are constructed circumferentially on the inner surface of the first lining of the tunnel; during the construction of the second lining of the tunnel, a sliding connection mechanism is installed at a specific position at the cut section of the adjacent segmented tunnels so that it engages to connect the two segmented tunnels, and then the third waterproof mechanism is laid circumferentially; after the construction of the second lining of the tunnel is completed, a fourth waterproof mechanism is constructed on the inner surface of the second lining of the tunnel; after the overall construction is completed, the inflatable airbag is inflated through the inflation pipe, and the inflation valve is closed when the pressure gauge reaches the design pressure value.

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