Cast lining overlap device, tunnel lining trolley and tunnel construction method

Abstract

The present invention provides a cast lining overlap device, a tunnel lining trolley and a tunnel construction method. The cast lining overlap device comprises a top support panel, a first overlap extension, a first deformable member, a second overlap extension, a second deformable member and a limiter, wherein the top support panel, the first overlap extension, the second overlap extension and the limiter are arranged in sequence along the longitudinal direction, the first deformable member is arranged on the first overlap extension, the second deformable member is arranged on the second overlap extension, the second deformable member protrudes from the first deformable member and the elastic deformation capacity of the second deformable member is better than that of the first deformable member. The tunnel lining trolley comprises a main frame and a cast lining overlap device connected to the main frame. The tunnel construction method comprises obtaining pressure detection data of the first deformable member through a pressure sensing device; when the pressure detection data reaches a preset value, the cast lining overlap device stops extending. The present invention effectively ensures the quality of the lining section and the quality of the lining section overlap construction joint.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a cast lining overlap device, a tunnel lining trolley and a tunnel construction method. Background Art

[0002] When pouring the secondary lining layer during tunnel construction, the existing construction technology uses a secondary lining trolley for cast-in-place concrete. The lining trolley is a rigid structure as a whole. When the lining layer is poured in sections along the longitudinal direction of the tunnel, the trolley is pushed into place to position and support the template of the section to be poured, which involves the overlap operation of one side panel and the end of the poured lining section.

[0003] The existing lining trolley end overlap methods mainly include rigid overlap and flexible overlap.

[0004] like Figure 1 As shown, the first and second lining sections 91 that have been cast are located in the first area 901 of the lining position 900, and the second area 902 is the area where the second and second lining sections are to be cast. When the rigid overlap method is adopted, the top support panel 81 of the trolley is in direct hard contact with the end of the first and second lining sections 91 that have been cast. The end is a weak point on the first and second lining sections 91. Under the rigid overlap compression, the ends of the first and second lining sections 91 will most likely cause concrete cracks to occur, which will bury a major hidden danger to the quality and safety of the construction joints there; in addition, due to the deviations in the walking and positioning of the lining trolley, the rigid overlap method can easily cause the top support panel 81 to overlap the ends of the first and second lining sections 91 loosely, resulting in leakage of concrete during the concrete casting process in the second area 902, and further leading to quality defects at the construction joints.

[0005] like Figure 2 As shown, the top support panel 82 includes a first plate body 821 extending in the longitudinal direction of the tunnel (in the x-axis direction shown in the figure) and a second plate body 822 bent and extended from the first plate body 821 away from the lining position 900. The extension member 83 is fixed on the second plate body 822 and extends the top support panel 82 longitudinally. The flexible rubber member 84 is fixed on the side of the extension member 83 close to the lining position 900, and the flexible rubber member 84 protrudes from the surface 820 of the first plate body 821 facing the lining position 900. In the flexible overlap mode, the flexible rubber member 84 contacts the end of the first and second lining sections 91 to avoid hard contact and solve the problems of concrete cracking and loose overlap, but as shown in FIG. Figure 3 and Figure 4As shown, when there are deviations in the movement and positioning of the lining trolley, the flexible rubber member 84 is not completely facing the first and second lining sections 91. In this state, after the support, the first plate 821 and a part of the flexible rubber member 84 pass over the base surface 90 and enter the second area 902. After the concrete is poured in the second area 902 and demolded, a depression 921 appears on the surface of the pouring section and an irregular pit 922 is formed at the construction joint, causing quality problems with defects at the construction joint. Summary of the invention

[0006] The first object of the present invention is to provide a cast lining overlap device which can ensure the quality of the lining section and the quality of the lining section overlap construction joint.

[0007] The second object of the present invention is to provide a tunnel lining trolley which ensures the quality of the lining section and the quality of the overlapping construction joints of the lining sections.

[0008] The third object of the present invention is to provide a tunnel construction method that ensures the quality of the lining section and the quality of the overlapping construction joints of the lining sections.

[0009] The first object of the present invention is to provide a cast lining overlap device for a tunnel lining trolley, one side of the cast lining overlap device faces the lining position, the cast lining overlap device includes a top support panel, a first overlap extension, a first deformable member, a second overlap extension, a second deformable member and a limit member, the top support panel includes a first plate body and a second plate body, the first plate body extends in the longitudinal direction of the tunnel, the surface side of the first plate body is a mating surface facing the lining position, the second plate body is bent and extended from the extended end of the first plate body along the second direction and away from the lining position, the second direction is perpendicular to the longitudinal direction; the first overlap extension is connected to the second plate body, and in the second direction, a first installation position is formed on the side of the first overlap extension close to the mating surface; the first deformable member is arranged in the first installation position; the second overlap extension is connected to the first overlap extension, The connecting extension piece and the second overlapping extension piece are arranged in sequence along the longitudinal direction; in the second direction, a second installation position is formed on the side of the second overlapping extension piece close to the matching surface, and the second deformable piece is arranged at the second installation position, and the matching surface, the first deformable piece and the second deformable piece are arranged adjacent to each other in the longitudinal direction; the elastic deformation capacity of the second deformable piece is greater than the elastic deformation capacity of the first deformable piece, and the second deformable piece protrudes from the matching surface and is close to the lining position relative to the matching surface; the limiting piece is connected to the second overlapping extension piece, and the top supporting panel, the first overlapping extension piece, the second overlapping extension piece and the limiting piece are arranged in sequence along the longitudinal direction; the limiting piece blocks the second installation position from the longitudinal direction, and the top of the limiting piece is away from the lining position relative to the matching surface; along the longitudinal direction and in the direction gradually approaching the limiting piece, the protrusion height of the second deformable piece relative to the matching surface gradually increases and gradually approaches the lining position.

[0010] It can be seen from the above scheme that the present invention arranges two deformation members with different hardness to cooperate and contact with the end of the lining section that has been cast, wherein in the longitudinal direction, the second deformation member with lower hardness is closer to the first and second lining sections that have been cast, and the first deformation member with higher hardness corresponds to the end of the first and second lining sections that have been cast and the construction joint. When the top support panel is positioned and supported, the harder first deformation member undergoes a small amount of deformation and will not be squeezed into the second area, and the first plate body will not enter the second area. Therefore, after the concrete casting of the second area is completed and demolded, no concave position will be formed at the bottom of the second and second lining sections that have been cast, and no pit will be formed at the construction joint between the two casting sections, thereby effectively improving the quality of the lining and the lining construction joint. In addition, the height of the second deformation member gradually increases in the longitudinal direction and in the direction gradually away from the construction joint, that is, the second deformation member has an inclined upper end and the top end is away from the construction joint. When the second deforming member contacts the cast first and second lining sections and is squeezed and deformed, the top end of the second deforming member is guided obliquely and bent and deformed away from the construction joint and is limited by the top of the limit member for further squeezing. Finally, the inclined upper end surface of the second deforming member reaches a flat state, ensuring a larger fitting surface between the two and a greater degree of squeezing between the top end of the second deforming member and the first and second lining sections, which can better ensure sealing.

[0011] A further solution is that the second deformable member has a peak away from the matching surface, and a guide slope is formed on the surface side of the second deformable member, and the guide slope extends perpendicularly to the longitudinal direction to the peak.

[0012] As can be seen from the above, along the longitudinal direction, the second deformable member has a low portion on the side close to the first deformable member, and the second deformable member has a high portion on the side away from the first deformable member. In the second direction, the high portion is closer to the lining position than the low portion. The second deformable member also includes a guide slope, which extends from the low portion to the high portion at an angle to the longitudinal direction.

[0013] A further solution is that in the longitudinal direction, the size of the first deformable member is larger than the size of the second deformable member; in the second direction, the size of the second deformable member is larger than the size of the first deformable member.

[0014] As can be seen from the above, since the second deformable member is used to ensure the sealing performance between the overlapping device and the first and second lining sections that have been cast, the second deformable member has a larger height to increase the deformation amount and ensure the matching force with the first and second lining sections; and the first deformable member is harder and has a larger size in the longitudinal direction, so that the first deformable member can span the first and second lining sections and the construction joint in the longitudinal direction, thereby ensuring the integrity of the two lining sections and the construction joint contours.

[0015] A further solution is that the first deformable member protrudes from the matching surface and is close to the lining position relative to the matching surface.

[0016] As can be seen from the above, since the first deformable member will produce a certain deformation during the top support, the slightly raised first deformable member is roughly flush with the first plate body after deformation. This arrangement can ensure that the surfaces of two continuous lining sections are as continuous as possible.

[0017] A further solution is that one end of the second deformable member close to the first deformable member protrudes from the first deformable member and is close to the lining position relative to the first deformable member.

[0018] As can be seen from the above, since the deformation capacity of the second deformable member is greater than that of the first deformable member, and the second deformable member is used to ensure the sealing performance between the overlapping device and the first and second lining sections that have been cast, the second deformable member protrudes from the first deformable member. When positioning the top support, it can ensure that the second deformable member is fully deformed and fits more fully with the surface of the first and second lining sections that have been cast.

[0019] Another further solution is that the first overlapping extension member has a first end surface facing the first deformable member, and the second overlapping extension member has a second end surface facing the second deformable member, and the second end surface is farther away from the lining position than the first end surface.

[0020] As can be seen from the above, under this setting, the second installation position has a deeper depth to accommodate a higher second deformable member, so that the second deformable member has a better deformation effect, and a flexible material with greater deformation capacity can be selected to further avoid squeezing the concrete while ensuring contact sealing.

[0021] A further solution is that the first deformable member and the second deformable member are both made of rubber material.

[0022] A further solution is that the cast lining overlap device further includes a pressure sensing device, which is disposed in the first overlap extension member, and a sensing end of the pressure sensing device is connected to the first deformation member.

[0023] As can be seen from the above, when the panel is positioned and supported, the pressure sensing device can also be used to constantly detect the extrusion pressure of the first deformable member at this time, thereby effectively preventing excessive extrusion pressure from affecting the first and second lining sections.

[0024] The tunnel lining trolley provided by the second purpose of the present invention includes a main frame and a plurality of cast lining overlap devices telescopically connected to the main frame along the circumferential direction of the tunnel; the cast lining overlap devices adopt the above-mentioned cast lining overlap devices.

[0025] The tunnel construction method provided by the third purpose of the present invention is implemented by the above-mentioned tunnel lining trolley; the cast lining overlap device also includes a pressure sensing device, the pressure sensing device is arranged in the first overlap extension piece, and the sensing end of the pressure sensing device is connected to the first deformable piece; the lining position includes a first area and a second area arranged in sequence along the longitudinal direction; the tunnel construction method includes: completing the casting of the first and second lining sections in the first area; controlling the cast lining overlap device so that the second deformable piece and the first deformable piece are facing the first and second lining sections, and the mating surface is facing the second area; controlling the cast lining overlap device to extend so that the second deformable piece and the first deformable piece abut against the first and second lining sections, and obtaining pressure detection data through the pressure sensing device; when the pressure detection data reaches the preset value, controlling the cast lining overlap device to stop extending, and at this time the first and second lining sections form a gap with the limit piece, and the deformed part of the second deformable piece is located in the gap; completing the casting of the second and second linings in the second area.

[0026] It can be seen from the above scheme that when the cast lining overlap device of the present invention is used for construction, when the panel is positioned and supported, the extrusion pressure of the first deformable member at this time is constantly detected by the pressure sensing device, thereby effectively preventing the extrusion pressure from being too large and causing the first and second lining sections to crack, thereby effectively protecting the first and second lining sections, and under the special contour design of the second deformable member, the close fit between the first and second lining sections that have been cast is further ensured to effectively prevent leakage of casting slurry, thereby ensuring the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the rigid overlap method in the prior art.

[0028] Figure 2 It is a schematic diagram of the first working state of the flexible overlap method in the prior art.

[0029] Figure 3 It is a schematic diagram of the second working state of the flexible overlap method in the prior art.

[0030] Figure 4 It is a schematic diagram of the third working state of the flexible overlap method in the prior art.

[0031] Figure 5 It is a schematic diagram of the working state of the tunnel lining trolley embodiment of the present invention.

[0032] Figure 6 It is a schematic diagram of the first working state of an embodiment of the cast lining overlap device of the tunnel lining trolley of the present invention.

[0033] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0034] Figure 8It is a schematic diagram of the second working state of the embodiment of the cast lining overlap device of the tunnel lining trolley of the present invention.

[0035] Fig. 9 for Figure 8 Enlarged view of point B in the middle.

[0036] Fig.10 It is a schematic diagram of the third working state of the embodiment of the cast lining overlap device of the tunnel lining trolley of the present invention.

[0037] Fig.11 for Fig.10 Enlarged view of point C in the middle. DETAILED DESCRIPTION

[0038] Tunnel lining trolley embodiment

[0039] See also Figure 5 and Figure 6 In the coordinate system in the figure, the x-axis direction is the longitudinal direction of the tunnel, the z-axis direction is the height direction and the second direction of the present invention, and the y-axis direction is the transverse direction of the tunnel.

[0040] See also Figure 5 The tunnel lining trolley of the present invention comprises a main frame 11 and a plurality of cast lining overlap devices 2 of the present invention which are telescopically connected to the main frame 11 along the circumferential direction of the tunnel. A vertical lifting hydraulic cylinder 121 is provided at the lower part of the main frame 11, and the main frame 11 and the cast lining overlap devices 2 are connected by a supporting hydraulic cylinder 122. In addition, a control platform 13 and a ventilation pipe 14 are also provided in the middle part of the main frame 11. Of course, a track wheel set is provided at the bottom of the main frame 11, and a track is provided on the invert filling layer 73 of the tunnel.

[0041] Combination Figure 5 and Figure 6 From the outside to the inside, the tunnel includes an initial support layer 71 and a secondary lining layer 72 arranged in sequence, and the pouring of the secondary lining layer 72 is along the longitudinal direction of the tunnel ( Figure 6 The lining position 900 is a space for casting the secondary lining layer 72, wherein the first area 901 in the lining position 900 is the area where the first secondary lining section 91 that has been cast is located, and the second area 902 in the lining position 900 is the area where the second secondary lining section to be cast is located. When casting the second secondary lining section, the cast lining overlap device 2 needs to overlap with the first secondary lining section 91 that has been cast.

[0042] Recombination Figure 7, one side of the cast lining overlap device 2 faces the above-mentioned lining position 900, and the cast lining overlap device 2 includes a top support panel 21, a first overlap extension 22, a second overlap extension 23, a limiter 24, a first deformable member 25, a second deformable member 26 and a pressure sensing device 15. Among them, the top support panel 21 includes a first plate body 211 and a second plate body 212. The first plate body 211 is a template for the secondary lining layer. The first plate body 211 extends along the longitudinal direction of the tunnel. The surface side of the first plate body 211 is a mating surface 210 for forming the contour of the secondary lining layer 72 facing the lining position 900. The second plate body 212 is bent and extended from the longitudinally extending end of the first plate body 211 along the negative direction of the z-axis and away from the lining position 900, and extends from Figure 7 It can be seen that the second plate 212 is perpendicular to the first plate 211 .

[0043] In the longitudinal direction of the tunnel, the first lap extension 22 has first side walls 221 located on opposite sides of the first lap extension 22 and a first internal space 222 located between the two first side walls 221. A first side wall 221 close to the second plate 212 is connected to the second plate 212 by a first bolt 271 along the longitudinal direction, and the pressure sensing device 15 is arranged in the first internal space 222. The first lap extension 22 is provided with a first end face 220 on one side facing the lining position 900, and a first installation position is formed outside the first end face 220. The first deformation member 25 is arranged in the first installation position, and the sensing end 151 of the pressure sensing device 15 passes through the end wall of the first lap extension 22 and contacts the first deformation member 25. The pressure sensing device 15 is electrically connected to the processor of the control platform 13.

[0044] In the longitudinal direction of the tunnel, the second lap extension 23 has second side walls 231 located on opposite sides of the second lap extension 23 and a second internal space 232 located between the two second side walls 231. A second side wall 231 close to the first lap extension 22 is connected to another first side wall 221 on the first lap extension 22 by a second bolt 272 along the longitudinal direction. The second lap extension 23 is provided with a second end face 230 on one side facing the lining position 900, and a second installation position is formed outside the second end face 230, and the second deformable member 26 is provided in the second installation position. The limiting member 24 is a baffle, and the limiting member 24 is fixedly connected to the other second side wall 231 of the second lap extension 23.

[0045] At this time, along the longitudinal direction of the tunnel, the top support panel 21, the first lap extension 22, the second lap extension 23 and the limiter 24 are arranged in sequence, and the first lap extension 22 and the limiter 24 are closer to the lining position 900 than the second end face 230, so the first lap extension 22 and the limiter 24 respectively limit the second deformable member 26 located in the second installation position from both sides in the longitudinal direction. The top support panel 21 and the second deformable member 26 located in the second installation position are closer to the lining position 900 than the first end face 220, so the top support panel 21 and the second deformable member 26 respectively limit the first deformable member 25 located in the first installation position from both sides in the longitudinal direction. In addition, from Figure 7 It can be seen that in the second direction, the top 241 of the limiting member 24 is farther away from the lining position 900 than the matching surface 210 .

[0046] like Figure 6 and Figure 7 As shown, when the cast lining overlap device 2 is in an unstressed state, the first deformable member 25 protrudes from the mating surface 210 of the first plate body 211 and is closer to the lining position 900 than the mating surface 210, and the first deformable member 25 has a flat upper surface 250. The second deformable member 26 protrudes from the first deformable member 25 and is closer to the lining position 900 than the first deformable member 25. Further, in the longitudinal direction, the second deformable member 26 has a low portion 262 close to the first deformable member 25 and a high portion 261 away from the first deformable member. In the second direction, the high portion 261 is closer to the lining position 900 than the low portion 262, and the low portion 262 is closer to the lining position 900 than the upper surface 250. The second deformable member 26 also includes a guide slope 260 extending between the low portion 262 and the high portion 261 obliquely in the longitudinal direction, and the guide slope 260 is also a surface on the second deformable member 26 for contacting the lining section.

[0047] In this embodiment, the first deformable member 25 and the second deformable member 26 are both made of rubber material, but the elastic deformation capacity of the second deformable member 26 is greater than that of the first deformable member 25, and the second deformable member 26 is softer. Figure 7 It can be seen that in the second direction, the size of the second deformable member 26 is larger than that of the first deformable member 25, but in the longitudinal direction, the size of the first deformable member 25 is larger than that of the second deformable member 26. Specifically, in the longitudinal direction, the size of the first deformable member 25 is greater than 7 cm, and the size of the second deformable member 26 is greater than 3 cm.

[0048] Recombination Figure 8 and Fig. 9When the cast lining overlap device 2 is positioned and supported and the positioning is relatively accurate, the supporting panel 21 is facing the second area 902 where the second secondary lining section is to be cast, and the first deforming member 25 and the second deforming member 26 are facing the first secondary lining section 91 that has been cast and is located in the first area 901. At this time, the upper surface 250 of the first deforming member 25 and the guiding inclined surface 260 of the second deforming member 26 abut against the first secondary lining section 91 and produce extrusion deformation until the mating surface 210 is aligned with the surface of the first secondary lining section 91.

[0049] At this time, the extrusion deformation of the first deformable member 25 is small, while the extrusion deformation of the second deformable member 26 is large. When the second deformable member 26 contacts the first and second lining sections 91 and is extruded and deformed, the top of the high portion 261 of the second deformable member 26 is obliquely guided and bent and deformed away from the construction joint 903 and is limited by the top 241 of the stopper 24 for further extrusion. Finally, the inclined upper end surface (guide slope 260) of the second deformable member 26 reaches a flat state, and the top of the high portion 261 of the second deformable member 26 is squeezed in the gap 240 between the first and second lining sections 91 and the top 241 of the stopper 24. In addition to ensuring a sufficient contact surface between the second deformable member 26 and the first and second lining sections 91, the degree of extrusion between the two can be increased, which can better ensure the sealing. Of course, since the second deformable member 26 is relatively soft, it will not cause hard contact with the first and second lining sections 91 to avoid causing concrete cracking.

[0050] And as Fig.10 and Fig.11 As shown, when there are deviations in the walking and positioning of the lining trolley, only a small part of the upper surface 250 of the first deformable member 25 faces and abuts the first secondary lining section 91 that has been cast, while most of it faces the second area 902 of the second secondary lining section to be cast. Figure 3 and Fig.11 Even if a portion of the first deformable member 25 abuts against the first secondary lining section 91, another portion of the first deformable member 25 will not be squeezed and bulge into the second area 029 like the flexible rubber member 84 in the prior art to affect the casting of the second secondary lining section, thereby ensuring the quality of the construction joint.

[0051] Therefore, regardless of whether there is a deviation in the movement and positioning of the lining trolley, the cast lining overlap device 2 of the present invention can ensure flexible overlap with the first and second lining sections 9 that have been cast, and ensure sealing and avoid leakage without damaging the concrete. In addition, even if there is a deviation in the movement and positioning of the lining trolley, after the second area 902 is cast in concrete and demolded, no depressions or irregular pits will appear at the construction joint, thereby effectively ensuring the quality of the casting section and the construction joint.

[0052] Tunnel construction method embodiment

[0053] Combination Figures 5 to 9 The tunnel construction method of the present invention is implemented using the tunnel lining trolley of the present invention. The pressure sensing device 15 in each cast lining overlap device 2 is electrically connected to the processor of the control platform 13. The pressure received by the first deformation member 25 can be detected by the pressure sensing device 15 and form pressure detection data and transmit it to the control platform 13 for calculation.

[0054] The tunnel construction method mainly includes a method for overlapping and casting the secondary lining section, and the method includes: first, casting the first secondary lining section 91 in the first area 901. Then, the tunnel lining trolley is controlled to continue to travel in the longitudinal direction of the tunnel until the second deformable member 26 and the first deformable member 25 face the first secondary lining section 91 that has been cast, and the mating surface 210 of the top support panel 21 faces the second area 902 where the second secondary lining section is to be cast, and the positioning is completed.

[0055] Then, the overlapping step is performed, and the supporting hydraulic cylinder 122 is controlled to extend so that the cast lining overlapping device 2 completes positioning and supporting. At this time, the second deformable member and the first deformable member both abut against the first secondary lining section 91. Then, the system obtains the pressure detection data about the first deformable member 25 through the pressure sensing device 15, and determines whether the pressure detection data reaches the preset value. If so, the supporting hydraulic cylinder 122 is controlled to stop so that the cast lining overlapping device 2 stops extending, and at this time, the first secondary lining section 91 forms a gap 240 with the limiting member 24, and the deformed part of the second deformable member 26 is located in the gap 240.

[0056] Then, pouring of the second secondary lining is carried out in the second area 902 .

[0057] Among them, the above-mentioned preset values ​​for comparison with the pressure detection data can be determined after multiple on-site tests in combination with the actual operation of the hydraulic system of the trolley itself.

[0058] When the cast lining overlap device of the present invention is used for construction, when the panel is positioned and supported, the pressure sensing device constantly detects the extrusion pressure of the harder first deformable member 25 at this time, thereby effectively preventing the first and second lining sections 91 from cracking due to excessive extrusion pressure, thereby effectively protecting the first and second lining sections 91, and the special contour design of the second deformable member 26 further ensures the close fit between the first and second lining sections 91 that have been cast, effectively preventing leakage of casting, thereby ensuring the construction quality.

[0059] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cast lining overlap device of a tunnel lining trolley, wherein one side of the cast lining overlap device faces the lining position, comprising: A top support panel, the top support panel comprising a first plate body and a second plate body, the first plate body extending in the longitudinal direction of the tunnel, the surface side of the first plate body being a mating surface facing the lining position, the second plate body being bent and extended from an extended end of the first plate body along a second direction and away from the lining position, the second direction being perpendicular to the longitudinal direction; A first overlapping extension piece, wherein the first overlapping extension piece is connected to the second plate body, and a first installation position is formed on a side of the first overlapping extension piece close to the mating surface in the second direction; A first deformable member, the first deformable member is arranged at a first installation position; Features: The cast lining overlap device also includes a second overlap extension member and a second deformation member; The second overlapping extension piece is connected to the first overlapping extension piece, and the top support panel, the first overlapping extension piece and the second overlapping extension piece are arranged in sequence along the longitudinal direction; In the second direction, a second installation position is formed on one side of the second overlapping extension member close to the mating surface, the second deformable member is arranged on the second installation position, and the mating surface, the first deformable member and the second deformable member are arranged adjacent to each other in sequence along the longitudinal direction; The elastic deformation capacity of the second deformable member is greater than that of the first deformable member, and the second deformable member protrudes from the matching surface and is close to the lining position relative to the matching surface; The cast lining overlap device further comprises a limiter, the limiter is connected to the second overlap extension, and the top support panel, the first overlap extension, the second overlap extension and the limiter are sequentially arranged along the longitudinal direction; The limiting member blocks the second installation position from the longitudinal direction, and the top of the limiting member is away from the lining position relative to the matching surface; Along the longitudinal direction and in a direction gradually approaching the limiting member, the protrusion height of the second deformable member relative to the matching surface gradually increases and gradually approaches the lining position.

2. The cast lining overlap device of the tunnel lining trolley according to claim 1, characterized in that: Along the longitudinal direction, the second deformable member has a low portion on a side close to the first deformable member, and the second deformable member has a high portion on a side away from the first deformable member, and in the second direction, the high portion is closer to the lining position than the low portion; The second deformation member further includes a guide slope, which extends from the lower portion to the upper portion in an inclined manner with respect to the longitudinal direction.

3. The cast lining overlap device of the tunnel lining trolley according to claim 2, characterized in that: In the longitudinal direction, the size of the first deformable member is greater than the size of the second deformable member; In the second direction, a size of the second deformable member is greater than a size of the first deformable member.

4. The cast lining overlap device of the tunnel lining trolley according to claim 3, characterized in that: The first deformable member protrudes from the matching surface and is close to the lining position relative to the matching surface.

5. The cast lining overlap device of the tunnel lining trolley according to claim 4, characterized in that: One end of the second deformable member close to the first deformable member protrudes from the first deformable member and is close to the lining position relative to the first deformable member.

6. The cast lining overlap device of the tunnel lining trolley according to claim 3, characterized in that: The first overlapping extension piece has a first end surface facing the first deformable piece, and the second overlapping extension piece has a second end surface facing the second deformable piece, wherein the second end surface is farther from the lining position than the first end surface.

7. The cast lining overlap device of a tunnel lining trolley according to any one of claims 1 to 6, characterized in that: The first deformable member and the second deformable member are both made of rubber material.

8. The cast lining overlap device of a tunnel lining trolley according to any one of claims 1 to 6, characterized in that: The cast lining overlap device further comprises a pressure sensing device, wherein the pressure sensing device is arranged in the first overlap extension member, and a sensing end of the pressure sensing device is connected to the first deformation member.

9. A tunnel lining trolley, comprising a main frame and a plurality of cast lining overlap devices telescopically connected to the main frame along the circumferential direction of the tunnel; Features: The cast lining overlap device adopts the cast lining overlap device described in any one of claims 1 to 7 above.

10. A tunnel construction method, characterized in that: The method is implemented by using the tunnel lining trolley as claimed in claim 9; The cast lining overlap device further comprises a pressure sensing device, the pressure sensing device is arranged in the first overlap extension member, and a sensing end of the pressure sensing device is connected to the first deformation member; The lining position includes a first area and a second area sequentially arranged along the longitudinal direction; The tunnel construction method comprises: completing the pouring of the first secondary lining section in the first area; Controlling the cast lining overlap device so that the second deformable member and the first deformable member face the first secondary lining section, and the mating surface faces the second area; Controlling the cast lining overlap device to extend so that the second deformable member and the first deformable member abut against the first secondary lining section, and obtaining pressure detection data through the pressure sensing device; When the pressure detection data reaches a preset value, the cast lining overlap device is controlled to stop extending, and at this time, a gap is formed between the first secondary lining section and the limiter, and the deformed part of the second deformable member is located in the gap; The second secondary lining is poured in the second area.

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