Shield tunnel with assembled corrugated steel ribs to reinforce the inner wall

Abstract

The present invention relates to a shield tunnel with an assembled corrugated steel rib plate reinforced inner wall, comprising a plurality of tunnel pipe segments distributed along the tunnel extension direction and an assembled corrugated steel rib plate reinforced inner wall, wherein the tunnel pipe segments are spliced ​​together to form the tunnel pipe wall, the assembled corrugated steel rib plate reinforced inner wall is formed by splicing a plurality of support rings distributed along the tunnel extension direction, the support ring is formed by splicing a plurality of arc segments distributed along the circumference of the support ring, the arc segment comprises a box body surrounded by a bottom plate, a circumferential end plate and an axial end plate, the box body is connected with a rib plate made of corrugated steel plates, the corrugation direction on the rib plate is the axial direction of the support ring, and the rib plate is an arc curved along the circumference of the support ring. The present invention has the advantages of low self-weight and high strength of the tunnel lining constructed, and solves the problem of heavy self-weight of the existing internal lining reinforcement to form the lining.

Description

Technical Field

[0001] The invention relates to the technical field of subway tunnel construction, and in particular to a shield tunnel with an assembled corrugated steel rib plate reinforcing the inner wall. Background Art

[0002] In recent years, the construction of urban shield tunnels has developed rapidly. At the same time, due to the increase in operating time and the surrounding construction disturbances, earthquakes, corrosion and other external forces, some operating tunnels have gradually developed different degrees of disease problems, such as structural cracks, joint leakage and longitudinal uneven settlement, which has led to the decline of shield tunnel structural performance and seriously threatened public transportation safety. Therefore, the reinforcement of shield tunnels is very necessary.

[0003] At present, the reinforcement methods for operating tunnels are roughly divided into two types: external stratum reinforcement and internal lining reinforcement. The external stratum reinforcement methods include grouting, advanced anchors, etc.; the internal reinforcement lining methods include steel plate bonding, embedded steel arches, and fiber material bonding. The various existing shield tunnel reinforcement methods currently depend mainly on the application of new materials and new technologies. Different methods can play a role in enhancing the structural bearing capacity and preventing water leakage to a certain extent, but there are also certain limitations. For the steel plate bonding method in internal lining reinforcement, it is to install thick steel plates in sections on the inner side of the shield tunnel, thereby improving the structural bearing capacity and overall stiffness of the shield tunnel. However, this method has poor economic efficiency and complex construction technology. As the operation time of the shield tunnel increases further, problems such as the heavy weight and low corrosion resistance of the steel plate will gradually be exposed. In addition, the existing sealing connection between adjacent tunnel pipe segments and adjacent curved concrete precast panels is poor, and poor sealing effect is prone to water seepage. Summary of the invention

[0004] The first object of the present invention is to provide a shield tunnel with a lining having low deadweight and high strength and an inner wall reinforced with assembled corrugated steel ribs, thereby solving the problem of heavy deadweight of the existing inner lining reinforcement.

[0005] The second invention object of the present invention is to further provide a shield tunnel with assembled corrugated steel ribs to reinforce the inner wall and good sealing and connection reliability of the tunnel wall at the construction site, thereby solving the problem of poor sealing reliability and connection reliability of the tunnel wall of existing subway tunnels.

[0006] The above technical problems are solved by the following technical solutions: a shield tunnel with an assembled corrugated steel rib plate reinforced inner wall, the shield tunnel with an assembled corrugated steel rib plate reinforced inner wall comprises a plurality of tunnel pipe segments distributed along the extension direction of the tunnel, the tunnel pipe segments are spliced ​​together to form the tunnel pipe wall, the tunnel pipe segment is a concrete structure, the tunnel pipe segment is spliced ​​by a plurality of arc-shaped concrete prefabricated panels distributed along the circumference of the tunnel pipe segment, the shield tunnel with an assembled corrugated steel rib plate reinforced inner wall also comprises an assembled corrugated steel rib plate reinforced inner wall, the assembled corrugated steel rib plate reinforced inner wall is spliced ​​by a plurality of support rings distributed along the extension direction of the tunnel, the support rings extend along the circumference of the shield tunnel, adjacent support rings are fixed together, and the support rings are It is formed by splicing together a number of arc-shaped segments distributed along the circumference of the support ring, the arc-shaped segments include a bottom plate, circumferential end plates connected to the bottom plate at both ends of the support ring in the circumferential direction, and axial end plates connected to the bottom plate at both ends of the support ring in the axial direction, the bottom plate, the circumferential end plates and the axial end plates form a box body, the bottom plate is an arc-shaped curved along the circumference of the support ring; when the support ring is installed in the shield tunnel, the outer surface of the bottom plate fits on the inner circumferential surface of the shield tunnel; the box body is connected with ribs made of corrugated steel plates, the corrugation direction of the ribs is the axial direction of the support ring, the ribs are an arc-shaped curved along the circumferential direction of the support ring, and the wave crests on the ribs fit on the inner surface of the bottom plate; when making the shield tunnel, first splice the tunnel pipe segments to form the tunnel pipe wall, and then splice the support ring to form assembled corrugated steel ribs to reinforce the inner wall. The assembled corrugated steel ribs in this technical solution reinforce the inner wall. Compared with ordinary steel plates, the corrugated steel plates form arches in the longitudinal and axial directions due to their own hyperbolic thin-walled structure, so their three-dimensional stress guidance increases the bearing capacity and stability of the structure. If the structure is hot-dip galvanized or stainless steel materials are used, the corrosion resistance of the structure will be greatly improved, making the service life of the reinforced structure longer, thereby reducing the number of repairs and reducing the cost of shield tunnel reinforcement.

[0007] Preferably, the two end faces of the arc-shaped concrete precast plate along the circumference of the tunnel pipe segment are provided with axial grooves extending along the axial direction of the tunnel pipe segment, the two end faces of the arc-shaped concrete precast plate along the axial direction of the tunnel pipe segment are provided with circumferential grooves extending along the circumference of the tunnel pipe segment, the axial grooves are connected with the circumferential grooves, the circumferential grooves on adjacent tunnel pipe segments are combined to form an annular sealing hole, cement slurry is poured into the annular sealing hole to form an outer concrete sealing ring that seals and connects adjacent tunnel pipe segments together, the axial grooves on adjacent arc-shaped concrete precast plates are combined to form a straight sealing hole, cement slurry is poured into the straight sealing hole to form a sealing hole that seals and connects the adjacent tunnel pipe segments together. The outer concrete sealing strips of the adjacent arcuate concrete precast panels are sealed and connected together, and the outer concrete sealing ring is cast together with the outer concrete sealing strips; the two end faces of the arcuate concrete precast panels along the circumference of the arcuate concrete precast panels are provided with axial notches extending along the axial direction of the arcuate concrete precast panels, and the axial notches are located on the radial inner ends of the arcuate concrete precast panels; the two end faces of the arcuate concrete precast panels along the axial direction of the arcuate concrete precast panels are provided with circumferential notches extending along the circumference of the arcuate concrete precast panels, and the circumferential notches are located on the radial inner ends of the arcuate concrete precast panels, and the axial notches are connected with the circumferential notches, and the adjacent arcuate concrete precast panels The circumferential notches on the upper and lower surfaces are combined to form an annular sealing groove, cement slurry is poured into the annular sealing groove to form an inner concrete sealing ring that seals and connects adjacent arcuate concrete precast panels together, the axial notches on adjacent arcuate concrete precast panels are combined to form a straight sealing groove, cement slurry is poured into the straight sealing groove to form an inner concrete sealing strip that seals and connects adjacent arcuate concrete precast panels together, and the annular inner concrete sealing ring and the concrete sealing inner bonding strip are cast together; the connection of the tunnel pipe segment is staggered with the connection of the support ring, and the support ring is bonded to the inner circumferential surface of the tunnel pipe wall through the inner concrete sealing ring and the inner concrete sealing strip. The process of making a shield tunnel is as follows: A. Splice the tunnel pipe segments together to form the tunnel pipe wall; B. Splice the support rings together to form an assembled corrugated steel rib plate to reinforce the inner wall located in the inner space of the tunnel pipe wall; C. Inject cement slurry from the straight sealing hole to fill the annular sealing hole and the straight sealing hole, inject cement slurry from the straight sealing groove to fill the straight sealing groove and the annular sealing groove, the cement slurry in the annular sealing hole solidifies to form an outer concrete sealing ring, the cement slurry in the straight sealing hole solidifies to form an outer concrete sealing strip, the cement slurry in the annular sealing groove solidifies to form an inner concrete sealing strip, and the cement slurry in the straight sealing groove solidifies to form an inner concrete sealing strip. This technical solution can make the connection and sealing between the tunnel pipe segments reliable, and it is not easy to cause water seepage from the docking. It is convenient to fix the support ring, and the support ring can also serve as a mold for grouting in the annular sealing groove and the straight sealing groove.

[0008] Preferably, a rope threading hole extending along the axial direction of the tunnel tube segment is provided on the end face of the arc-shaped concrete precast panel, a steel cable in a tensioned state is passed through the rope threading hole, all the tunnel tube segments are tightened by the steel cable and abutted together, a concrete inner core is cast in the rope threading hole, and the concrete inner core casts the steel cable and the arc-shaped concrete precast panel together; the process of step A is as follows: A1 sets a clamp at one end of the steel cable to clamp it on an end face of the tunnel tube wall; A2 passes the other end of the steel cable through the rope threading holes of a set number of tunnel tube segments and then connects it with the steel cable tensioning mechanism, and the steel cable tensioning mechanism is supported on the On the end face of the tunnel pipe segment farthest from the clamp among the set number of tunnel pipe segments, the steel cable tensioning mechanism is used to tension the steel cable. The force generated when the steel cable tensioning mechanism tensions the steel cable makes the set number of tunnel pipe segments pressed together; in step C, cement slurry is also injected from the rope threading hole. The cement slurry in the rope threading hole solidifies to form the concrete inner core. After all the cement slurries are solidified, the steel cable tensioning mechanism loses the tensioning effect on the steel cable. Under the action of the concrete inner core, the steel cable still maintains the tensioning effect and the tunnel pipe segments are pressed together with the set force; repeat steps A2, B and C until the construction of the tunnel wall is completed. It can make the tunnel pipe segments tightly connected, reduce leakage during grouting and the thickness of the cement bonding layer, and make the connection more firm and reliable. In addition to playing the role of tensioning during construction, the steel cable can also play the role of connecting reinforcement after the construction is completed.

[0009] Preferably, a connecting groove connecting the rope threading hole and the circumferential groove is provided on the axial end surface of the arc-shaped concrete precast plate, and the cement slurry in the rope threading hole is injected from the axial sealing hole and then enters through the connecting groove to fill the rope threading hole. It is convenient to grout and form the inner core when the cable is kept in a tensioned state.

[0010] Preferably, a stainless steel sealing ring is provided between adjacent tunnel pipe segments, and a sealing ring portion recess just filled with the tunnel pipe segment portion recess is provided at a portion of the stainless steel sealing ring end face corresponding to the tunnel pipe segment portion recess on the tunnel pipe segment end face, and a sealing ring portion recess just filled with the tunnel pipe segment portion recess is provided at a portion corresponding to the tunnel pipe segment portion recess on the tunnel pipe segment end face; the method for making and installing the stainless steel sealing ring is: a mold ring made of plasticine is placed between adjacent tunnel pipe segments, and then the tunnel pipe segment is squeezed through the mold ring to obtain the concave-convex data of the end faces of the two tunnel pipe segments butted together and the tunnel pipe segment end face matching data of the gap width change data between the two tunnel pipe segments end faces, and a stainless steel sealing ring having thickness data consistent with the valve core positive change data and end face concave-convex data matching with the end face concave-convex data of the tunnel pipe segment is processed according to the tunnel pipe segment end face matching data, so that the stainless steel sealing ring is placed between the two tunnel pipe segments at the same position as the mold ring when molding and is clamped by the adjacent tunnel pipe segments. After the tunnel pipe segments are manufactured, the end faces may not be parallel to each other during the actual docking. At this time, grouting will cause leakage from the joints, which will lead to a rapid reduction in grouting pressure. The rapid reduction in pressure will result in a small number of tunnel pipe segments that can be grouted together at one time. This technical solution can solve the above technical problems.

[0011] Preferably, the clamp is provided with a connecting through hole, the steel cable is inserted into the connecting through hole, the end of the steel cable is tied to form a knot and clamped at one end of the connecting through hole, the other end of the connecting through hole is welded with the steel cable to form a welding block, and the portion of the steel cable between the knot and the welding block is in a tensioned state with a tension force greater than the force when the steel cable is tensioned to compress the tunnel pipe segment; the method of fixing the clamp with the steel cable is as follows: after the end of the steel cable is passed through the connecting through hole, a knot is formed to form a knot at one end of the connecting through hole that can prevent the steel cable from passing through the connecting through hole, the steel cable is pulled from the other end of the connecting through hole until the tension force reaches a force greater than the force when the steel cable is tensioned to compress the tunnel pipe segment, and the steel cable is welded with the other end of the connecting through hole to form a welding block while the steel cable is kept in tension. By providing the clamp and the welding connection, it can be ensured that both are stressed at the same time, and the strength is good, which solves the problem of insufficient stress caused by a small stress point due to the small steel cable.

[0012] Preferably, the cable tensioning mechanism comprises a fixed support plate, a movable support plate and a plurality of cable fixing mechanisms, the fixed support plate is connected with a plurality of guide columns penetrating the movable support plate, the movable support plate is threadedly connected with a threaded push rod supported on the fixed support plate, the fixed support plate is provided with an annular sealing positioning protrusion penetrating the circumferential groove, the portion of the fixed support plate corresponding to the axial sealing hole is provided with a grouting hole, the portion corresponding to the rope threading hole is provided with a cable through hole, and the cable fixing structure is connected to the movable support plate; the cable is tensioned by the cable tensioning mechanism to realize the tunnel segment The method for tightening the segments is as follows: the grouting hole is aligned with the straight seal, and the annular seal positioning protrusion is located in the circumferential groove, and the end surface of the tunnel pipe segment farthest from the clamping head in the tunnel pipe segment squeezed and tightened at the same time is pressed, and the steel cables are passed through the steel cable holes one by one and fixed to the steel cable fixing structure one by one, and the threaded push rod is rotated to separate the movable support plate from the fixed support plate, and the movable support plate drives the steel cable fixing structure to move together so that the steel cable is tensioned, and when the steel cable is tensioned, the fixed support plate squeezes the tunnel pipe segment so that the tunnel pipe segments are squeezed and tightened. A specific technical solution for the steel cable tensioning mechanism is provided.

[0013] Preferably, the cable fixing mechanism comprises a support rod with one end passing through the movable support plate, a force sensor connected to the end face of the support rod, an extrusion sleeve with a prismatic surface fitted on the support rod to press the force sensor, a push rod driving the push rod to squeeze the force sensor in a direction away from the fixed support plate, and a cable connection structure connected to the other side of the support rod to fix the cable with the support rod, the push rod is threadedly connected to the support frame, and the support frame is fixed with the movable support plate; the threaded push rod is rotated to separate the movable support plate from the fixed support plate until the force detected by the force sensor in the cable fixing mechanism reaches a set value, and the threaded push rod is stopped from rotating, and the push rod in the cable fixing mechanism where the force detected by the force sensor does not reach the set value is rotated, and the push rod drives the support rod to move in a direction away from the fixed support plate until the force detected by the force sensor reaches a set value, and the push rod is stopped from rotating. The tensioning time can be accelerated under the premise of ensuring that each cable is tensioned. If the push rod is not rotated properly, the force sensor will be damaged due to rotation.

[0014] Preferably, the steel cable connection structure comprises a clamp, a connecting pin and two forks at both ends of the connecting pin, and the forks are connected to the support rod; the method for fixing the steel cable by the steel cable connection structure is to pass the end of the steel cable around the part of the connecting pin between the two forks to form a folded portion, and the folded portion is clamped by the clamp.

[0015] Preferably, a tenon groove is provided on the end surface of one end of the arc-shaped concrete precast panel along the circumference of the tunnel tube segment, and a tenon is provided on the end surface of the other end, and the tenon groove extends along the axial direction of the tunnel tube segment; the tenon on one of the adjacent arc-shaped concrete precast panels is inserted into the tenon groove of the other arc-shaped concrete precast panel, so as to improve the connection reliability between the arc-shaped concrete precast panels.

[0016] Preferably, the rib plate has an axial dimension along the support ring that is more than one time the wavelength of the corrugation of the corrugated steel plate, so as to repeatedly exert the strength advantage of the corrugated steel plate.

[0017] Preferably, two circumferential end plates located on two arc-shaped segments and adjacent to each other along the circumference of the support ring are fitted and fixed together, so that the strength improvement effect of the tunnel wall is good and the fixation is reliable.

[0018] Preferably, the plane where the circumferential end plate is located extends along the radial direction of the support ring and is parallel to the axis of the support ring. The connection at the connection point is reliable.

[0019] Preferably, the two ends of the rib plate along the circumference of the support ring are fitted and welded to the two circumferential end plates in the same arc segment in a one-to-one correspondence, so that the connection is reliable.

[0020] Preferably, the circumferential end plate is provided with circumferential end plate bolt holes, and the two circumferential end plates on two adjacent arc-shaped segments along the circumference of the support ring are fixed together by passing circumferential connection rivets through the circumferential end plate bolt holes. The connection is convenient and can avoid loosening caused by vibration generated by the bolt and nut connection during subway operation.

[0021] Preferably, the two axial end plates located on the two support rings and adjacent to each other along the axial direction of the support rings are fitted and fixed together.

[0022] Preferably, the plane where the axial end plate is located is perpendicular to the axis of the support ring.

[0023] Preferably, the axial end plate is provided with an axial end plate bolt hole, and two axial end plates located on two support rings adjacent to each other along the axial direction of the support ring are fixed together by riveting through the axial connection rivets through the axial end plate bolt holes. The connection is convenient and can avoid loosening caused by vibration generated by the bolt and nut connection during subway operation.

[0024] Preferably, the two axial end plates of the same arc segment are connected together by a reinforcing plate, and the rib plate is located between the base plate and the reinforcing plate; between two adjacent support rings, the connection between the two arc segments on one support ring is staggered with the connection between the two arc segments on the other support ring.

[0025] The present invention has the following advantages: the strength can be improved by setting up assembled corrugated steel ribs to reinforce the inner wall; the connection between the tunnel pipe segments in the technical solution is reliable and has good strength; the assembled corrugated steel ribs to reinforce the inner wall in the technical solution have the following advantages: (1) the ribs of the hyperbolic thin-walled structure made of corrugated steel plates increase the bearing capacity and overall stability of the structure, are light in weight, and are made of stainless steel structure. The corrosion resistance and high strength characteristics greatly increase the service life of the reinforcement system, thereby saving the reinforcement cost in disguise; (2) the structural characteristics of being able to be assembled and disassembled at any time make the reinforcement construction process more convenient and quick, and have good adhesion with the original tunnel segments, and higher reinforcement accuracy; (3) the anchoring splicing method avoids the loosening of bolts caused by the vibration generated during the tunnel operation process, thereby increasing the overall stability of the reinforcement structure; (4) the reinforcement structure is formed by splicing segments of the same model, and the model can have a variety of variations, which is conducive to mass production in the factory and assembly during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0027] Figure 2 for Figure 1 A local enlarged schematic diagram of point B;

[0028] Figure 3 for Figure 1 A local enlarged schematic diagram of point C;

[0029] Figure 4 It is an axial schematic diagram of the present invention;

[0030] Figure 5 It is a schematic diagram of two support rings connected together;

[0031] Figure 6 for Figure 5 A local enlarged schematic diagram of the A

[0032] Figure 7 It is a schematic diagram of the present invention when it is manufactured;

[0033] Figure 8 for Figure 7 A local enlarged schematic diagram of D;

[0034] Fig. 9 for Figure 7 A local enlarged schematic diagram of point E;

[0035] Fig.10 for Fig. 9 A local enlarged schematic diagram of point F.

[0036] In the figure: tunnel pipe segment 1, assembled corrugated steel rib reinforced inner wall 2, arc-shaped concrete precast plate 3, support ring 4, arc-shaped segment 47, bottom plate 5, circumferential end plate 6, axial end plate 7, rib plate 8, circumferential end plate bolt hole 9, axial end plate bolt hole 10, reinforcement plate 11, gap 12, connection of two arc-shaped segments on one support ring 13, connection of two arc-shaped segments on another support ring 14, circumferential groove 15, outer concrete sealing ring 16, straight sealing hole 17, circumferential notch 18, Straight sealing groove 19, inner concrete sealing ring 20, steel cable 22, concrete inner core 23, connecting groove 25, stainless steel sealing ring 26, connecting through hole 27, knot 28, welding block 29, fixed support plate 30, movable support plate 31, steel cable fixing mechanism 32, guide column 33, threaded push rod 34, annular sealing positioning protrusion 35, support rod 36, force sensor 37, extrusion sleeve 38, push rod 39, support frame 40, hoop 41, connecting pin 42, fork 43, folding part 44, tenon 45, and clamp 46. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 10A shield tunnel with an assembled corrugated steel rib reinforced inner wall comprises a plurality of tunnel pipe segments 1 distributed along the tunnel extension direction and an assembled corrugated steel rib reinforced inner wall 2. The tunnel pipe segments are spliced ​​together to form the tunnel pipe wall, and the tunnel pipe segments are concrete structures. The tunnel pipe segments are spliced ​​together by a plurality of arc-shaped concrete prefabricated panels 3 distributed along the circumference of the tunnel pipe segments. The assembled corrugated steel rib reinforced inner wall is spliced ​​together by a plurality of support rings 4 distributed along the tunnel extension direction. The support rings extend along the circumference of the shield tunnel, and adjacent support rings are fixed together. The support rings are spliced ​​together by a plurality of arc-shaped segments 47 distributed along the circumference of the support rings. The arc segment includes a bottom plate 5, a circumferential end plate 6 connected to the bottom plate at both ends of the support ring in the circumferential direction, and an axial end plate 7 connected to the bottom plate at both ends of the support ring in the axial direction. The bottom plate, the circumferential end plate and the axial end plate form a box body, and the bottom plate is an arc-shaped curved along the circumferential direction of the support ring; when the support ring is installed in the shield tunnel, the outer surface of the bottom plate is attached to the inner circumferential surface of the shield tunnel; a rib plate 8 made of corrugated steel plate is connected to the box body, and the corrugation direction of the rib plate is the axial direction of the support ring. The rib plate is an arc-shaped curved along the circumferential direction of the support ring, and the wave crest on the rib plate is attached to the inner surface of the bottom plate; when making a shield tunnel, the tunnel pipe segments are first spliced ​​to form the tunnel pipe wall, and then the support ring is spliced ​​to form an assembled corrugated steel rib plate to reinforce the inner wall. The size of the rib plate along the axial direction of the support ring is more than one times the wavelength of the corrugation of the corrugated steel plate, and in this embodiment, it is 1.5 times the wavelength. Two circumferential end plates located on two arc segments adjacent to each other along the circumference of the support ring are attached and fixed together. The plane where the circumferential end plate is located extends along the radial direction of the support ring and is parallel to the axis of the support ring. The two ends of the rib plate along the circumference of the support ring are fitted and welded to the two circumferential end plates in the same arc segment in a one-to-one correspondence. The circumferential end plate is provided with a circumferential end plate bolt hole 9, and the two circumferential end plates on the two arc segments adjacent to each other along the circumference of the support ring are fixed by anchoring together after passing the circumferential connecting rivet through the circumferential end plate bolt hole. The two axial end plates located on the two support rings that are adjacent to each other along the axial direction of the support ring are fitted and fixed together. The plane where the axial end plate is located is perpendicular to the axis of the support ring. The axial end plate is provided with an axial end plate bolt hole 10, and the two axial end plates located on the two support rings that are adjacent to each other along the axial direction of the support ring are fixed by riveting together after passing the axial connecting rivet through the axial end plate bolt hole. The two axial end plates in the same arc segment are connected together by a reinforcing plate 11, and a gap 12 is left between the reinforcing plate and the two axial end plates, so that the construction is convenient when fixing. The ribs are located between the bottom plate and the reinforcing plate; between two adjacent support rings, the connection 13 of the two arc segments on one support ring is staggered with the connection 14 of the two arc segments on the same support ring.

[0039] The two end faces of the arc-shaped concrete precast plate along the circumference of the tunnel pipe segment are provided with axial grooves extending along the axial direction of the tunnel pipe segment. The two end faces of the arc-shaped concrete precast plate along the axial direction of the tunnel pipe segment are provided with circumferential grooves 15 extending along the circumference of the tunnel pipe segment. The axial grooves are connected with the circumferential grooves. The circumferential grooves on adjacent tunnel pipe segments are combined to form an annular sealing hole. Cement slurry is poured into the annular sealing hole to form an outer concrete sealing ring 16 that seals and connects the adjacent tunnel pipe segments together. The axial grooves on the adjacent arc-shaped concrete precast plates are combined to form a straight sealing hole 17. Cement slurry is poured into the straight sealing hole to form an outer concrete sealing ring 16 that seals and connects the adjacent tunnel pipe segments together. The arc-shaped concrete precast panels are sealed and connected together with an outer concrete sealing strip, and the outer concrete sealing ring is cast together with the outer concrete sealing strip; the two end faces of the arc-shaped concrete precast panels along the circumference of the arc-shaped concrete precast panels are provided with axial notches extending along the axial direction of the arc-shaped concrete precast panels, and the axial notches are located on the radial inner ends of the arc-shaped concrete precast panels; the two end faces of the arc-shaped concrete precast panels along the axial direction of the arc-shaped concrete precast panels are provided with circumferential notches 18 extending along the circumference of the arc-shaped concrete precast panels, and the circumferential notches are located on the radial inner ends of the arc-shaped concrete precast panels, and the axial notches are connected with the circumferential notches, and adjacent arc-shaped concrete precast panels The circumferential notches on the support ring are enclosed to form an annular sealing groove, cement slurry is poured into the annular sealing groove to form an inner concrete sealing ring 20 that seals and connects the adjacent arcuate concrete precast panels together, the axial notches on the adjacent arcuate concrete precast panels are enclosed to form a straight sealing groove 19, cement slurry is poured into the straight sealing groove to form an inner concrete sealing strip that seals and connects the adjacent arcuate concrete precast panels together, and the annular inner concrete sealing ring and the concrete sealing inner bonding strip are cast together; the connection of the tunnel pipe segment is staggered with the connection of the support ring, and the support ring is bonded to the inner circumferential surface of the tunnel pipe wall through the inner concrete sealing ring and the inner concrete sealing strip; The process of making a shield tunnel is as follows: A. Splice the tunnel tube segments together to form the tunnel tube wall; B. Splice the support rings together to form an assembled corrugated steel rib plate reinforcement inner wall located in the internal space of the tunnel tube wall; C. Inject cement slurry from the straight sealing hole to fill the annular sealing hole and the straight sealing hole, and inject cement slurry from the straight sealing groove to fill the straight sealing groove and the annular sealing groove. The cement slurry in the annular sealing hole solidifies to form an outer concrete sealing ring, the cement slurry in the straight sealing hole solidifies to form an outer concrete sealing strip, the cement slurry in the annular sealing groove solidifies to form an inner concrete sealing strip, and the cement slurry in the straight sealing groove solidifies to form an inner concrete sealing strip.

[0040] Furthermore, a rope threading hole extending along the axial direction of the tunnel tube segment is provided on the end face of the arc-shaped concrete precast panel, a steel cable 22 in a tensioned state is passed through the rope threading hole, all the tunnel tube segments are tightened and abutted together by the steel cable, a concrete inner core 23 is cast in the rope threading hole, and the concrete inner core casts the steel cable and the arc-shaped concrete precast panel together; the process of step A is as follows: A1 sets a clamp 46 at one end of the steel cable to clamp it on an end face of the tunnel tube wall; A2 passes the other end of the steel cable through the rope threading holes of a set number of tunnel tube segments and then connects it to the steel cable tensioning mechanism, and the steel cable tensioning mechanism is supported on a set On the end surface of the tunnel pipe segment farthest from the clamp among the number of tunnel pipe segments, the steel cable tensioning mechanism is used to tension the steel cable. The force generated by the steel cable tensioning mechanism when tensioning the steel cable makes the set number of tunnel pipe segments pressed together; in step C, cement slurry is also injected into the rope threading hole. The cement slurry in the rope threading hole solidifies to form the concrete inner core. After all the cement slurries are solidified, the steel cable tensioning mechanism loses the tensioning effect on the steel cable. Under the action of the concrete inner core, the steel cable still maintains the tensioning effect and makes the tunnel pipe segments pressed together with the set force; repeat steps A2, B and C until the construction of the tunnel wall is completed. A connecting groove 25 connecting the rope threading hole and the circumferential groove is provided on the axial end surface of the arc-shaped concrete precast plate. The cement slurry in the rope threading hole is injected from the axial sealing hole and then enters through the connecting groove to fill the rope threading hole. In order to grout the through groove, an exhaust hole is provided between the tunnel pipe segments connected together at different times for exhaust. A stainless steel sealing ring 26 is arranged between adjacent tunnel pipe segments, and a sealing ring portion recess just filled with the tunnel pipe segment portion recess is arranged at a portion on the end face of the stainless steel sealing ring corresponding to the tunnel pipe segment portion recess on the end face of the tunnel pipe segment, and a sealing ring portion recess just filled with the tunnel pipe segment portion recess is arranged at a portion on the end face of the tunnel pipe segment corresponding to the tunnel pipe segment portion recess; the method for making and installing the stainless steel sealing ring is as follows: a mold ring made of plasticine is placed between adjacent tunnel pipe segments, and then the tunnel pipe segment is squeezed by the mold ring to obtain the concave-convex data of the end faces of the two tunnel pipe segments butted together and the tunnel pipe segment end face matching data of the gap width change data between the two tunnel pipe segments end faces, and a stainless steel sealing ring having thickness data consistent with the valve core positive change data and end face concave-convex data matching with the end face concave-convex data of the tunnel pipe segment is processed according to the tunnel pipe segment end face matching data, so that the stainless steel sealing ring is placed between the two tunnel pipe segments at the same position as the mold ring when taking the mold and is clamped by the adjacent tunnel pipe segments.The clamp is provided with a connecting through hole 27, and the steel cable is passed through the connecting through hole. The end of the steel cable is knotted to form a knot 28 and clamped at one end of the connecting through hole. The other end of the connecting through hole is welded with the steel cable to form a welding block 29. The portion of the steel cable between the knot and the welding block is in a tensioned state with a tension force greater than the force when the steel cable is tensioned to compress the tunnel pipe segment. The method of fixing the clamp and the steel cable together is as follows: after the end of the steel cable is passed through the connecting through hole, a knot is formed to form a knot located at one end of the connecting through hole that can prevent the steel cable from passing through the connecting through hole, the steel cable is pulled from the other end of the connecting through hole until the tension force reaches a force greater than the force when the steel cable is tensioned to compress the tunnel pipe segment, and the steel cable is welded to the other end of the connecting through hole to form a welding block while the steel cable remains in a tensioned state. The cable tensioning mechanism includes a fixed support plate 30, a movable support plate 31 and a plurality of cable fixing mechanisms 32. The fixed support plate is connected with a plurality of guide columns 33 which are penetrated on the movable support plate. The movable support plate is threadedly connected with a threaded push rod 34 which is supported on the fixed support plate. The fixed support plate is provided with an annular sealing positioning protrusion 35 which is penetrated in the circumferential groove. The portion of the fixed support plate corresponding to the axial sealing hole is provided with a grouting hole, and the portion corresponding to the rope threading hole is provided with a cable through hole. The cable fixing structure is connected to the movable support plate. The cable is tensioned by the cable tensioning mechanism to realize the abutment and tightening of the tunnel pipe segments. The method is as follows: the grouting hole is aligned with the straight seal, and the annular seal positioning protrusion is located in the circumferential groove. The end face of the tunnel pipe segment farthest from the clamping head in the tunnel pipe segment that is squeezed and tightened at the same time is pressed. The steel cables pass through the steel cable holes one by one and are fixed to the steel cable fixing structure one by one. The threaded push rod is rotated to separate the movable support plate from the fixed support plate. The movable support plate drives the steel cable fixing structure to move together so that the steel cable is tensioned. When the steel cable is tensioned, the fixed support plate squeezes the tunnel pipe segment so that the tunnel pipe segments are squeezed and tightened. The steel cable fixing mechanism includes a support rod 36 with one end passed through the movable support plate, a force sensor 37 connected to the end face of the support rod, an extrusion sleeve 38 of a pressure sensor which is fitted on the support rod with a prismatic surface, a push rod 39 which drives the push rod to extrude the force sensor in a direction away from the fixed support plate, and a steel cable connecting structure connected to the other side of the support rod to fix the steel cable to the support rod, the push rod is threadedly connected to a support frame 40, and the support frame is fixed to the movable support plate; the threaded push rod is rotated to separate the movable support plate from the fixed support plate until the force detected by a force sensor in the steel cable fixing mechanism reaches a set value, the threaded push rod is stopped from being rotated, and the push rod in the steel cable fixing mechanism whose force detected by the force sensor does not reach the set value is rotated, and the push rod drives the support rod to move in a direction away from the fixed support plate until the force detected by the force sensor reaches a set value, and the push rod is stopped from being rotated. The steel cable connection structure includes a clamp 41, a connecting pin 42 and two forks 43 at both ends of the connecting pin, and the forks are connected to the support rod; the method for fixing the steel cable through the steel cable connection structure is to pass the end of the steel cable around the part of the connecting pin between the two forks to form a folded part 44, and the folded part is clamped by the clamp.A mortise groove is provided on the end surface of one end of the arc-shaped concrete precast plate along the circumference of the tunnel tube segment, and a tenon 45 is provided on the end surface of the other end, and the mortise groove extends along the axial direction of the tunnel tube segment; for adjacent arc-shaped concrete precast plates, the tenon on one arc-shaped concrete precast plate is inserted into the mortise groove of the other arc-shaped concrete precast plate.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield tunnel with an assembled corrugated steel rib plate reinforced inner wall, the shield tunnel with an assembled corrugated steel rib plate reinforced inner wall comprising a plurality of tunnel tube segments distributed along the tunnel extension direction, the tunnel tube segments being spliced ​​together to form a tunnel tube wall, the tunnel tube segments being a concrete structure, and the tunnel tube segments being spliced ​​by a plurality of arc-shaped concrete prefabricated panels distributed along the circumference of the tunnel tube segments, It is characterized in that The shield tunnel provided with assembled corrugated steel ribs to reinforce the inner wall also includes an assembled corrugated steel ribs to reinforce the inner wall, the assembled corrugated steel ribs to reinforce the inner wall is composed of a plurality of support rings distributed along the extension direction of the tunnel, the support rings extend along the circumference of the shield tunnel, adjacent support rings are fixed together, the support rings are composed of a plurality of arc segments distributed along the circumference of the support rings, the arc segments include a bottom plate, circumferential end plates connected to the bottom plate at both ends of the support ring along the circumference, and axial end plates connected to the bottom plate at both ends of the support ring along the axial direction, the bottom plate, the circumferential end plates and the axial end plates form a box body, the bottom plate is an arc curved along the circumference of the support ring; when the support ring is installed in the shield tunnel, the outer surface of the bottom plate fits in the shield tunnel On the inner circumferential surface; the box body is connected with a rib plate made of corrugated steel plate, the corrugation direction of the rib plate is the axial direction of the support ring, the rib plate is an arc-shaped plate bent along the circumferential direction of the support ring, and the wave crest on the rib plate fits on the inner surface of the bottom plate, and the two end surfaces of the arc-shaped concrete precast plate along the circumferential direction of the tunnel pipe segment are provided with axial grooves extending along the axial direction of the tunnel pipe segment, and the two end surfaces of the arc-shaped concrete precast plate along the axial direction of the tunnel pipe segment are provided with circumferential grooves extending along the circumferential direction of the tunnel pipe segment, the axial grooves are connected with the circumferential grooves, and the circumferential grooves on adjacent tunnel pipe segments are surrounded to form an annular sealing hole, and cement slurry is poured into the annular sealing hole to form an outer concrete sealing hole that seals and connects adjacent tunnel pipe segments together. The axial grooves on the adjacent arc-shaped concrete precast panels are surrounded to form a straight sealing hole, cement slurry is poured into the straight sealing hole to form an outer concrete sealing strip that seals and connects the adjacent arc-shaped concrete precast panels together, and the outer concrete sealing ring is cast together with the outer concrete sealing strip; the two end surfaces of the arc-shaped concrete precast panels along the circumference of the arc-shaped concrete precast panels are provided with axial notches extending along the axial direction of the arc-shaped concrete precast panels, and the axial notches are located on the radial inner ends of the arc-shaped concrete precast panels; the two end surfaces of the arc-shaped concrete precast panels along the axial direction of the arc-shaped concrete precast panels are provided with circumferential notches extending along the circumference of the arc-shaped concrete precast panels, and the circumferential notches are located on the radial inner ends of the arc-shaped concrete precast panels, and the axial The axial notches are connected with the circumferential notches, the circumferential notches on adjacent arcuate concrete precast panels are combined to form an annular sealing groove, cement slurry is poured into the annular sealing groove to form an inner concrete sealing ring that seals and connects the adjacent arcuate concrete precast panels together, the axial notches on adjacent arcuate concrete precast panels are combined to form a straight sealing groove, cement slurry is poured into the straight sealing groove to form an inner concrete sealing strip that seals and connects the adjacent arcuate concrete precast panels together, and the annular inner concrete sealing ring and the concrete sealing inner bonding strip are cast together; the connection between the tunnel pipe segments is staggered with the connection between the support ring, and the support ring is bonded to the inner circumferential surface of the tunnel pipe wall through the inner concrete sealing ring and the inner concrete sealing strip.

2. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 1, It is characterized in that A rope threading hole extending along the axial direction of the tunnel pipe segment is provided on the end surface of the arc-shaped concrete precast panel, a steel cable in a tensioned state is passed through the rope threading hole, all the tunnel pipe segments are tightened by the steel cable and abutted together, a concrete core is cast in the rope threading hole, and the concrete core casts the steel cable and the arc-shaped concrete precast panel together.

3. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 2, It is characterized in that A connecting groove connecting the rope threading hole and the circumferential groove is arranged on the axial end surface of the arc-shaped concrete precast plate. The cement slurry in the rope threading hole is injected from the straight sealing hole and then enters through the connecting groove to fill the rope threading hole.

4. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 2, It is characterized in that Stainless steel sealing rings are provided between adjacent tunnel pipe segments, and the end faces of the stainless steel sealing rings are provided with sealing ring recesses that are just filled with the tunnel pipe segment recesses at positions corresponding to the tunnel pipe segment recesses on the end faces of the tunnel pipe segments, and sealing ring recesses that just fill with the tunnel pipe segment recesses at positions corresponding to the tunnel pipe segment recesses on the end faces of the tunnel pipe segments.

5. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 2, It is characterized in that The clamping head is provided with a connecting through hole, the steel cable is inserted into the connecting through hole, the end of the steel cable is knotted to form a knot and clamped at one end of the connecting through hole, the other end of the connecting through hole is welded with the steel cable to form a welding block, and the part of the steel cable located between the knot and the welding block is in a tensioned state with a tensioning force greater than the force when the steel cable is tensioned to compress the tunnel pipe segment.

6. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 2, It is characterized in that The steel cable tensioning mechanism includes a fixed support plate, a movable support plate and a plurality of steel cable fixing mechanisms, the fixed support plate is connected with a plurality of guide columns penetrating the movable support plate, the movable support plate is threadedly connected with a threaded push rod supported on the fixed support plate, the fixed support plate is provided with an annular sealing positioning protrusion for penetrating the circumferential groove, the portion of the fixed support plate corresponding to the straight sealing hole is provided with a grouting hole, the portion corresponding to the rope threading hole is provided with a steel cable passing hole, and the steel cable fixing structure is connected to the movable support plate.

7. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 6, It is characterized in that The steel cable fixing mechanism includes a support rod with one end passing through the movable support plate, a force sensor connected to the end face of the support rod, an extrusion sleeve with a prismatic surface fitted on the support rod for pressing the force sensor, a push rod that drives the extrusion sleeve to squeeze the force sensor in a direction away from the fixed support plate, and a steel cable connecting structure connected to the other end of the support rod for fixing the steel cable to the support rod, the push rod is threadedly connected to the support frame, and the support frame is fixed to the movable support plate.

8. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 7, It is characterized in that The steel cable connection structure comprises a hoop, a connection pin and two forks at both ends of the connection pin, and the forks are connected to the support rod.

9. The shield tunnel with assembled corrugated steel ribs to reinforce the inner wall according to claim 1, It is characterized in that A mortise groove is provided on the end surface of one end of the arc-shaped concrete precast plate along the circumference of the tunnel tube segment, and a tenon is provided on the end surface of the other end, and the mortise groove extends along the axial direction of the tunnel tube segment; for adjacent arc-shaped concrete precast plates, the tenon on one arc-shaped concrete precast plate is inserted into the mortise groove of the other arc-shaped concrete precast plate.

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