Supporting structure for large deformation of soft surrounding rock in complex stress area tunnel

Abstract

The embodiment of the application provides a complex stress area tunnel soft surrounding rock large deformation supporting structure and relates to the field of tunnel soft surrounding rock. The complex stress area tunnel soft surrounding rock large deformation supporting structure comprises a tunnel component and a sealing plate component. When the sealing plate is installed, the connecting piece is passed through both sides of the sealing plate, and then the clamping plate is inserted into the connecting piece. As the clamping plate is gradually inserted into the connecting piece, the clamping plate gradually presses the sealing plate, thereby achieving the purpose of fixing the sealing plate. When the sealing plate needs to be disassembled, the clamping plate is pulled out from the side wall of the connecting piece, the clamping plate is released from the pressing of the sealing plate, the both sides of the sealing plate are pulled out from the connecting piece, and the sealing plate is removed. By the way that the clamping plate clamps and presses the sealing plate, when the clamping plate is too tight during disassembly, the clamping plate can be knocked out from the connecting piece by using a hammer. The disassembly process is simple, violent damage is reduced, and the situation that the disassembly is not convenient due to the influence of concrete is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tunnel soft surrounding rock, in particular to a large-deformation supporting structure for tunnel soft surrounding rock in a complex stress area. BACKGROUND

[0002] In the related art, the large-deformation supporting structure for tunnel soft surrounding rock in a complex stress area is supported by a steel arch formed by an I-shaped steel during supporting, which is mostly used in high-stress areas, and the inner stress of the surrounding rock is released first, and then the support is provided to resist deformation. During construction of the large-deformation supporting structure for tunnel soft surrounding rock in a complex stress area, an opening for releasing stress is first provided, so that, during the construction process, the surrounding rock is crushed due to large deformation when the inner stress of the surrounding rock is released, and the crushed surrounding rock is extruded and discharged through the opening, so as to relieve the large extrusion force of the large-deformation surrounding rock on the initial support, thereby preventing the initial support from being damaged. The steel arch formed by the I-shaped steel is stably supported by pouring concrete between the steel arch and the surrounding rock, and the opening for releasing stress is finally poured with concrete to release the stress. However, when the concrete is poured between the steel arch formed by the I-shaped steel and the surrounding rock, the inner wall of the steel arch needs to be blocked by a blocking plate, and the blocking plate is fixed between the I-shaped steels by welding, bolts or rivets. The bolts and rivets are difficult to disassemble due to the influence of the concrete, and the blocking plate is difficult to disassemble from the steel arch by violent disassembly using an acetylene cutter or a cutting machine. SUMMARY

[0003] The application aims to at least solve one of the technical problems existing in the prior art. To this end, the application provides a large-deformation supporting structure for tunnel soft surrounding rock in a complex stress area. When the blocking plate needs to be disassembled, the clamping plate is pulled out from the inner side wall of the connecting piece, the clamping plate is released from pressing the blocking plate, the blocking plate is pulled out from the connecting piece on both sides, and the blocking plate is removed. By clamping and pressing the blocking plate with the clamping plate, when the clamping plate is too tight during disassembly, the clamping plate can be knocked out of the connecting piece by using a hammer. The disassembly process is simple, violent damage is reduced, and the inconvenience of disassembly caused by the influence of the concrete is reduced.

[0004] The large-deformation supporting structure for tunnel soft surrounding rock in a complex stress area according to the embodiments of the application comprises a tunnel assembly and a blocking plate assembly.

[0005] The tunnel assembly comprises a surrounding rock body and a steel arch, the steel arch is arranged in the surrounding rock body, a stress release opening is arranged on the steel arch, a concrete layer is poured between the steel arch and the surrounding rock body, the sealing plate assembly is arranged in multiple, multiple sealing plate assemblies are laid on the inner wall of the steel arch, the sealing plate assembly comprises a sealing plate, multiple connecting pieces and a clamping plate, the sealing plate is laid on the inner wall of the steel arch, one end of the connecting piece is fixed to the steel arch, the other end of the connecting piece is slidably penetrated on both sides of the sealing plate, the connecting pieces are distributed at equal intervals on both sides of the steel arch, the upper end of the clamping plate is arranged as an inclined surface, the clamping plate is slidably penetrated on the side wall of the connecting piece, and the clamping plate is pressed against the inner wall of the steel arch.

[0006] According to some embodiments of the application, the sealing plate comprises a plate body and multiple fixing plates, the multiple fixing plates are fixedly connected to both sides of the plate body at equal intervals, the connecting pieces are slidably penetrated in the fixing plates, and the clamping plate is pressed against the fixing plates.

[0007] According to some embodiments of the application, the steel arch is fixedly connected with a mounting piece, and the connecting piece is arranged in the mounting piece.

[0008] According to some embodiments of the application, the mounting piece comprises a first mounting plate, a clamping groove is formed at both ends of the first mounting plate, one end of the connecting piece is inserted into the clamping groove, and the clamping groove can block the end of the connecting piece.

[0009] According to some embodiments of the application, the connecting piece comprises a connecting rod and a rotating part, a pressing groove is formed in the connecting rod, the upper end inside the pressing groove is arranged as an inclined surface, the clamping plate is slidably inserted into the pressing groove, the inclined surface of the clamping plate is matched with the inclined surface of the pressing groove, the rotating part is fixedly connected to one end of the connecting rod, the connecting rod is inserted from the side wall of the clamping groove, and the clamping groove can block the rotating part.

[0010] According to some embodiments of the application, a pouring piece is fixedly connected to the sealing plate.

[0011] According to some embodiments of the application, the pouring piece comprises a pouring pipe and a cover, the pouring pipe is fixedly connected to the sealing plate, and the cover is threadedly connected to the end of the pouring pipe away from the sealing plate.

[0012] According to some embodiments of the application, the cover is integrally injection molded by plastic.

[0013] According to some embodiments of the application, the cover comprises a cover body and a blocking rod, the blocking rod is fixedly connected in the cover body, the blocking rod extends into the pouring pipe, and the cover body is threadedly sleeved on the end of the pouring pipe.

[0014] According to some embodiments of the present application, the cover is uniformly provided with anti-skid strips around the periphery.

[0015] According to some embodiments of the present application, the stress release opening is further provided with a stone collecting assembly, the stone collecting assembly comprises a stone collecting box, a hinged piece, a material guiding plate, a connecting plate, a first bolt and two hanging rings, one end of the hinged piece is fixedly connected to the steel arch, the hinged piece is located at the lower end of the stress release opening, the lower end of the stone collecting box is fixedly connected to the other end of the hinged piece, the inner wall and the top end of the stone collecting box are uniformly provided with openings, the openings of the inner wall of the stone collecting box are fitted to the periphery of the stress release opening, the outer wall of the stone collecting box is provided with a mounting hole, the material guiding plate is arranged in the stone collecting box, the material guiding plate can slide along the side wall of the stone collecting box, the material guiding plate can be blocked in the stone collecting box, the connecting plate is fixedly connected in the mounting hole, the material guiding plate is fixed to the connecting plate by the first bolt, one of the hanging rings is fixedly connected to the outer wall of the upper end of the stone collecting box, the other hanging ring is fixedly connected to the upper end of the stress release opening, and the two hanging rings are fixed to each other.

[0016] According to some embodiments of the present application, the stone collecting box comprises a box body and a sliding rod, the sliding rod is fixedly connected to the four sides of the inside of the box body, the sliding rod is slidably penetrated through the material guiding plate, the connecting plate is provided with a pressing piece, the pressing piece is composed of a second bolt and a pressing nut, the second bolt is penetrated through the connecting plate, the pressing nut can press against the inner wall of the connecting plate, and the second bolt can press the material guiding plate against the periphery of the stress release opening.

[0017] According to some embodiments of the present application, the hinged piece comprises a second mounting plate, a supporting ear plate and a connecting ear plate, the second mounting plate is fixedly connected to the lower end of the stress release opening, the supporting ear plate is fixedly connected to the second mounting plate, the connecting ear plate is hingedly connected to the supporting ear plate, and the connecting ear plate is fixedly connected to the bottom end of the stone collecting box.

[0018] According to some embodiments of the present application, the stress release port is provided with a fastening assembly, the fastening assembly comprises a fastener and a compression nut, the fastener comprises a tensioning sleeve, a first expansion joint, a second expansion joint, a first baffle, a limiting plate, an injection pipe, a second baffle, a prismatic sleeve and a tightening nut, the surrounding rock body at the stress release port is provided with a connecting hole, one end of the tensioning sleeve is inserted into the connecting hole, the first expansion joint and the second expansion joint are arranged at the middle and the end of the tensioning sleeve respectively, the first expansion joint is composed of a plurality of arc-shaped expansion plates arranged at equal intervals, the first expansion joint and the second expansion joint are the same in structure, the first baffle and the limiting plate are fixedly connected to the two ends of the tensioning sleeve, the limiting plate is located at one end of the second expansion joint, the injection pipe is slidably penetrated through the first baffle and the limiting plate, the second baffle is fixedly connected to the outer wall of one end of the injection pipe, the prismatic sleeve is fixedly sleeved to the outer wall of one end of the injection pipe close to the second baffle, the prismatic sleeve is slidably penetrated through the limiting plate, the second baffle is compressed to the limiting plate, the tightening nut is threadedly sleeved to the outer wall of one end of the injection pipe away from the second baffle, the tightening nut is compressed to the second baffle, concrete is poured between the outer wall of the prismatic sleeve and the connecting hole, the compression nut is threadedly sleeved to the outer wall of one end of the tensioning sleeve close to the first baffle, a through hole is formed in the material guide plate, one end of the tensioning sleeve penetrates through the through hole, and the compression nut can compress the material guide plate to the steel arch.

[0019] According to some embodiments of the present application, a pad plate is slidably sleeved on the tensioning sleeve, and the compression nut compresses the pad plate to the material guide plate.

[0020] The beneficial effects of the present application are that when the sealing plate is installed, the connecting piece penetrates through both sides of the sealing plate, and then the clamping plate is inserted into the connecting piece. As the clamping plate is gradually inserted into the connecting piece, the clamping plate gradually compresses the sealing plate, thereby achieving the purpose of fixing the sealing plate. When the sealing plate needs to be disassembled, the clamping plate is pulled out from the side wall of the connecting piece, the compression of the clamping plate on the sealing plate is released, both sides of the sealing plate are pulled out from the connecting piece, and the sealing plate is removed. By clamping the compressed sealing plate with the clamping plate, when the clamping plate is too tight during disassembly, it only needs to be knocked out of the connecting piece with a hammer. The disassembly process is simple, violent damage is reduced, and the situation of being inconvenient to disassemble due to the influence of concrete is also reduced.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 is a three-dimensional structure schematic diagram of a complex stress area tunnel soft surrounding rock large deformation supporting structure according to the embodiment of the present application;

[0024] Figure 2 is a three-dimensional structure schematic diagram of a tunnel assembly according to the embodiment of the present application;

[0025] Figure 3 is a three-dimensional structure schematic diagram of a sealing plate assembly according to the embodiment of the present application;

[0026] Figure 4 is a three-dimensional structure schematic diagram of a sealing plate according to the embodiment of the present application; Figure 3 is an enlarged structure schematic diagram of A in FIG. 4;

[0027] Figure 5 is a three-dimensional structure schematic diagram of a mounting piece according to the embodiment of the present application;

[0028] Figure 6 is a three-dimensional structure schematic diagram of a connecting piece according to the embodiment of the present application;

[0029] Figure 7 is a three-dimensional structure schematic diagram of a pouring piece according to the embodiment of the present application;

[0030] Figure 8 is a three-dimensional structure schematic diagram of a sealing cover according to the embodiment of the present application;

[0031] Figure 9 is a three-dimensional structure schematic diagram of a stone collecting assembly according to the embodiment of the present application;

[0032] Figure 10 is a three-dimensional structure schematic diagram of a stone collecting box according to the embodiment of the present application;

[0033] Figure 11 is a three-dimensional structure schematic diagram of a hinged piece according to the embodiment of the present application;

[0034] Figure 12 is a three-dimensional structure schematic diagram of a fastening assembly according to the embodiment of the present application;

[0035] Figure 13 is a three-dimensional structure schematic diagram of a fastening piece according to the embodiment of the present application.

[0036] Icon: 100 - tunnel assembly; 110 - surrounding rock body; 120 - steel arch; 130 - stress release port; 140 - concrete layer; 200 - sealing plate assembly; 210 - sealing plate; 211 - plate body; 212 - fixing plate; 220 - connecting piece; 221 - connecting rod; 222 - pressing groove; 223 - rotating part; 230 - clamping plate; 240 - mounting piece; 241 - first mounting plate; 242 - clamping groove; 250 - pouring piece; 251 - pouring pipe; 252 - cover; 2521 - cover body; 2522 - blocking rod; 2523 - anti-skid strip; 300 - stone collecting assembly; 310 - stone collecting box; 311 - box body; 312 - sliding rod; 313 - pressing piece; 320 - hinged piece; 321 - second mounting plate; 322 - support lug plate; 323 - connecting lug plate; 330 - mounting hole; 340 - material guiding plate; 350 - connecting plate; 360 - first bolt; 370 - hanging ring; 380 - through hole; 400 - fastening assembly; 410 - fastening piece; 411 - tensioning sleeve; 412 - first expansion joint; 413 - second expansion joint; 414 - first baffle; 415 - limiting plate; 416 - injection molding pipe; 417 - second baffle; 418 - prismatic sleeve; 419 - tightening nut; 420 - backing plate; 430 - pressing nut. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0040] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] The complex stress zone tunnel soft surrounding rock large deformation supporting structure according to the embodiments of the present application is described below with reference to the drawings.

[0046] As Figures 1-13As shown in the drawings, the complex stress area tunnel soft surrounding rock large deformation supporting structure according to the embodiment of the present application comprises a tunnel component 100 and a sealing plate component 200, the tunnel component 100 is an engineering building embedded in the stratum and is a form of human utilization of underground space, and the sealing plate component 200 is used to limit the position of the concrete when the concrete is poured in the tunnel component 100.

[0047] As shown in the drawings, Figure 2 As shown in the drawings, the tunnel component 100 comprises a surrounding rock body 110 and a steel arch 120, the steel arch 120 is arranged in the surrounding rock body 110, the steel arch 120 is welded by I-beams connected longitudinally and transversely, the steel arch 120 is provided with a stress release port 130, the stress release port 130 is surrounded by the I-beams, a concrete layer 140 is poured between the steel arch 120 and the surrounding rock body 110, and the stress release port 130 is not poured when the concrete layer 140 is poured in the early stage, so that the broken rocks in the surrounding rock body 110 can be discharged and the stress can be released.

[0048] As shown in the drawings, Figure 3 As shown in the drawings, the sealing plate component 200 is provided in plurality, the plurality of sealing plate components 200 are laid on the inner wall of the steel arch 120, the sealing plate component 200 comprises a sealing plate 210, a plurality of connecting pieces 220 and a clamping plate 230, the sealing plate 210 is laid on the inner wall of the steel arch 120, one end of the connecting piece 220 is fixed to the steel arch 120, the other end of the connecting piece 220 is slidably penetrated through the sealing plate 210 on both sides, the connecting pieces 220 are distributed at equal intervals on both sides of the steel arch 120, the upper end of the clamping plate 230 is provided with an inclined surface, the clamping plate 230 is slidably penetrated through the side wall of the connecting piece 220, the clamping plate 230 presses the sealing plate 210 against the inner wall of the steel arch 120, when the sealing plate 210 is installed, the connecting piece 220 is penetrated through both sides of the sealing plate 210, then the clamping plate 230 is inserted into the connecting piece 220, along with the gradual insertion of the clamping plate 230 into the connecting piece 220, the clamping plate 230 gradually presses the sealing plate 210, thereby achieving the purpose of fixing the sealing plate 210, when the sealing plate 210 needs to be disassembled, the clamping plate 230 is pulled out from the side wall of the connecting piece 220, the pressing of the clamping plate 230 on the sealing plate 210 is released, both sides of the sealing plate 210 are pulled out from the connecting piece 220, and then the sealing plate 210 is removed, through the mode that the clamping plate 230 clamps and presses the sealing plate 210, when the clamping plate 230 is too tight during disassembly, the clamping plate 230 can also be knocked out from the connecting piece 220 by using a hammer, the disassembly process is simple, violent damage is reduced, and the situation that the disassembly is not convenient due to the influence of the concrete is also reduced.

[0049] As shown in the drawings, Figure 4 As shown in the drawings, the sealing plate 210 comprises a plate body 211 and a plurality of fixing plates 212, the plurality of fixing plates 212 are fixedly connected to both sides of the plate body 211 at equal intervals, wherein the fixing plate 212 and the plate body 211 are an integrated structure, the connecting piece 220 is slidably penetrated through the fixing plate 212, and the clamping plate 230 is pressed against the fixing plate 212, so as to facilitate the installation of the sealing plate 210.

[0050] As shown in Figure 5 The mounting member 240 is fixedly connected in the steel arch 120, and the connecting member 220 is arranged in the mounting member 240. The mounting member 240 comprises a first mounting plate 241. The first mounting plate 241 is provided with a clamping groove 242 at both ends. One end of the connecting member 220 is inserted into the clamping groove 242. The clamping groove 242 can block the end of the connecting member 220. After the sealing plate 210 is disassembled and before the sealing plate 210 is installed, the connecting member 220 is pulled out from the side wall of the clamping groove 242, and the connecting member 220 is disassembled, which is convenient for use next time.

[0051] As shown in Figure 6 The connecting member 220 comprises a connecting rod 221 and a rotating part 223. The connecting rod 221 is provided with a pressing groove 222. The upper end of the inside of the pressing groove 222 is provided as a slope surface. The clamping plate 230 is slidingly inserted into the pressing groove 222. The slope surface of the clamping plate 230 is attached to the slope surface of the pressing groove 222. When the clamping plate 230 is gradually inserted into the pressing groove 222, the clamping plate 230 is pressed against the sealing plate 210. The rotating part 223 is fixedly connected to one end of the connecting rod 221. The connecting rod 221 is inserted from the side wall of the clamping groove 242. The clamping groove 242 can block the rotating part 223, which is convenient for the connection and disassembly of the connecting rod 221.

[0052] As shown in Figure 7 The sealing plate 210 is fixedly connected with a pouring member 250. The pouring member 250 comprises a pouring pipe 251 and a cover 252. The pouring pipe 251 is fixedly connected to the sealing plate 210. Through the pouring pipe 251, concrete can be poured into the steel arch 120 and between the steel arch 120 and the surrounding rock body 110, which is convenient for forming the concrete layer 140. The cover 252 is threadedly connected to one end of the pouring pipe 251 away from the sealing plate 210. The cover 252 is integrally injection molded by plastic. After pouring is completed, the cover 252 is screwed to seal the pouring pipe 251.

[0053] As shown in Figure 8 The cover 252 comprises a cover body 2521 and a blocking rod 2522. The blocking rod 2522 is fixedly connected in the cover body 2521. The blocking rod 2522 extends into the pouring pipe 251, which reduces the blocking of the pouring pipe 251 by concrete. The cover body 2521 is threadedly sleeved at the end of the pouring pipe 251. The cover body 2521 is uniformly provided with anti-skid strips 2523 around the periphery, which is convenient for rotating the cover body 2521.

[0054] As shown in Figure 9The complex stress area tunnel weak surrounding rock large deformation supporting structure also includes a stone collecting assembly 300, and the stone collecting assembly 300 is arranged at the stress release opening 130. The stone collecting assembly 300 includes a stone collecting box 310, a hinged piece 320, a material guiding plate 340, a connecting plate 350, a first bolt 360 and two hanging rings 370. One end of the hinged piece 320 is fixedly connected to the steel arch 120, and the hinged piece 320 is located at the lower end of the stress release opening 130. The lower end of the stone collecting box 310 is fixedly connected to the other end of the hinged piece 320. Openings are uniformly arranged on the inner wall and the top end of the stone collecting box 310. The openings on the inner wall of the stone collecting box 310 are attached to the periphery of the stress release opening 130. An installation hole 330 is formed in the outer wall of the stone collecting box 310. The material guiding plate 340 is arranged in the stone collecting box 310 and can slide along the side wall of the stone collecting box 310. The material guiding plate 340 can be blocked in the stone collecting box 310. The connecting plate 350 is fixedly connected in the installation hole 330. The connecting plate 350 is fixedly connected in the installation hole 330 by welding. The material guiding plate 340 is fixed to the connecting plate 350 by the first bolt 360. One of the two hanging rings 370 is fixedly connected to the outer wall of the upper end of the stone collecting box 310, and the other is fixedly connected to the upper end of the stress release opening 130. The two hanging rings 370 are fixed to each other. The hanging ring 370 on the stone collecting box 310 is tied with a connecting rope. The connecting rope passes through the hanging ring 370 at the upper end of the stress release opening 130. At the same time, the connecting rope is tied on the hanging ring 370. The connecting rope tightens the stone collecting box 310, so that the openings on the inner wall of the stone collecting box 310 are attached to the periphery of the stress release opening 130. When the broken stones in the stress release opening 130 are squeezed out due to stress, the broken stones fall into the stone collecting box 310. When the broken stones in the stone collecting box 310 need to be discharged, the connection between the connecting rope and the hanging ring 370 at the upper end of the stress release opening 130 is released. The stone collecting box 310 is lowered through the connecting rope. The stone collecting box 310 rotates around the hinged piece 320. The broken stones in the stone collecting box 310 fall along the material guiding plate 340 and are collected, reducing the situation that the broken stones fall into the steel arch 120 and injure the personnel, and improving the safety during construction.

[0055] As Figure 10As shown, the aggregate collecting box 310 comprises a box body 311 and a sliding rod 312 fixedly connected to the periphery of the interior of the box body 311. In the embodiment, the sliding rod 312 is fixedly connected to the interior of the box body 311 by welding. The sliding rod 312 is slidably penetrated through the material guiding plate 340, and the material guiding plate 340 is capable of sliding along the sliding rod 312. The connecting plate 350 is provided with a pressing member 313 composed of a second bolt and a pressing nut. The second bolt is penetrated through the connecting plate 350, and the pressing nut is capable of pressing against the inner wall of the connecting plate 350. The second bolt is capable of pressing the material guiding plate 340 against the periphery of the stress releasing opening 130. When it is needed to pour concrete into the stress releasing opening 130, the fixation of the first bolt 360 and the material guiding plate 340 is released, the first bolt 360 is removed from the connecting plate 350, the second bolt is penetrated through the connecting plate 350, and the pressing nut is screwed. The distance between the pressing nut and the top end of the second bolt is adjusted, the second bolt is pressed against the material guiding plate 340, the pressing nut is pressed against the connecting plate 350, the material guiding plate 340 is fixed by the pressing of the second bolt and the limiting of the box body 311, the material guiding plate 340 is pressed against the periphery of the stress releasing opening 130, and then the concrete is poured into the stress releasing opening 130, so that the material guiding plate 340 realizes the dual functions of material guiding and sealing plate.

[0056] As shown, Figure 11 The hinged member 320 comprises a second mounting plate 321, a supporting lug plate 322 and a connecting lug plate 323. The second mounting plate 321 is fixedly connected to the lower end of the stress releasing opening 130. Specifically, the second mounting plate 321 is fixedly connected to the lower end of the stress releasing opening 130 by a bolt. The supporting lug plate 322 is fixedly connected to the second mounting plate 321. Specifically, the supporting lug plate 322 is fixedly connected to the second mounting plate 321 by welding. The connecting lug plate 323 is hingedly connected to the supporting lug plate 322 and is fixedly connected to the bottom end of the aggregate collecting box 310. The connecting lug plate 323 and the aggregate collecting box 310 are fixed by welding. When it is needed to dismount and mount the box body 311, the second mounting plate 321 is fixedly connected to the lower end of the stress releasing opening 130, the connecting lug plate 323 is hingedly connected to the supporting lug plate 322 by a pin shaft, the box body 311 is rotated to be attached to the stress releasing opening 130, and the box body 311 is fixed by the hanging ring 370, so as to facilitate the mounting and dismounting of the box body 311.

[0057] As shown, Figure 12 and Figure 13As shown, in the related art, the complex stress area tunnel soft surrounding rock large deformation supporting structure needs to fasten the soft surrounding rock by fastening structure, one end of the fastening structure is fixed in the surrounding rock body 110 by concrete pouring, and the other end is pressed against the inner wall of the tunnel by a nut to achieve the fastening effect of the soft surrounding rock. However, with the deformation of the soft surrounding rock, the end of the fastening structure fixed by concrete pouring is prone to concrete crushing, resulting in a weakened fastening force. At the same time, the nut is directly pressed against the inner wall of the tunnel, and when the nut applies excessive fastening force, the concrete structure of the inner wall of the tunnel is easily damaged. The complex stress area tunnel soft surrounding rock large deformation supporting structure further comprises a fastening assembly 400, and the fastening assembly 400 is arranged in each release stress port 130. The fastening assembly 400 comprises a fastening piece 410 and a pressing nut 430. The fastening piece 410 comprises a tension sleeve 411, a first expansion joint 412, a second expansion joint 413, a first baffle 414, a limiting plate 415, an injection pipe 416, a second baffle 417, a prismatic sleeve 418, and a tightening nut 419. The surrounding rock body 110 at the release stress port 130 is provided with a connecting hole. One end of the tension sleeve 411 is inserted into the connecting hole. The first expansion joint 412 and the second expansion joint 413 are arranged at the middle and the end of the tension sleeve 411, respectively. It should be noted that the first expansion joint 412, the second expansion joint 413, and the tension sleeve 411 are of an integrated structure. The first expansion joint 412 is composed of a plurality of arc-shaped expansion plates arranged at equal intervals. The first expansion joint 412 and the second expansion joint 413 are of the same structure. The first baffle 414 and the limiting plate 415 are fixedly connected to the two ends of the tension sleeve 411. Specifically, the first baffle 414 and the limiting plate 415 are fixedly connected to the two ends of the tension sleeve 411 by welding. The limiting plate 415 is located at one end of the second expansion joint 413. The injection pipe 416 is slidably penetrated through the first baffle 414 and the limiting plate 415. The second baffle 417 is fixedly connected to the outer wall of one end of the injection pipe 416. In some specific embodiments, the second baffle 417 and the injection pipe 416 are of an integrated structure. The prismatic sleeve 418 is fixedly sleeved to the outer wall of one end of the injection pipe 416 close to the second baffle 417. The prismatic sleeve 418 and the injection pipe 416 are of an integrated structure. The prismatic sleeve 418 is slidably penetrated through the limiting plate 415. The limiting plate 415 limits the rotation of the prismatic sleeve 418. The second baffle 417 is pressed against the limiting plate 415. The tightening nut 419 is threadedly sleeved to one end of the injection pipe 416 away from the second baffle 417. The tightening nut 419 is pressed against the second baffle 417. Concrete is poured between the outer wall of the prismatic sleeve 418 and the connecting hole. The pressing nut 430 is threadedly sleeved to the outer wall of one end of the tension sleeve 411 close to the first baffle 414. The guide plate 340 is provided with a through hole 380. One end of the tension sleeve 411 passes through the through hole 380. The pressing nut 430 can press the guide plate 340 against the steel arch 120. The tension sleeve 411 is slidably sleeved with a pad 420. The pressing nut 430 presses the pad 420 against the guide plate 340, and the guide plate 340 is pressed against the inner wall of the steel arch 120.The one end of the tension sleeve 411 is inserted into the connecting hole, the concrete is injected into the injection pipe 416, the concrete is extended to the end of the one end of the connecting hole by the injection pipe 416, and the concrete is filled in the connecting hole and the stress release port 130. After the concrete is solidified, the backing plate 420 is sleeved into the tension sleeve 411, and the compression nut 430 is screwed into the tension sleeve 411 until the compression nut 430 compresses the backing plate 420 to the side wall of the material guide plate 340. The pressure of the concrete structure near the injection pipe 416 is dispersed through the material guide plate 340, and the effect of the material guide plate 340 is realized. The material guide plate 340 is integrated with the sealing plate. When the soft surrounding rock deforms, the concrete of the one end of the fastening structure fixed by the concrete pouring is broken, and the fastening force is weakened. The tightening nut 419 is tightened, the injection pipe 416 moves along the tension sleeve 411 through the screw transmission principle, the pressure of the tightening nut 419 and the second baffle 417 on both ends of the tension sleeve 411 increases, the arc of the arc expansion plate on the first expansion joint 412 and the second expansion joint 413 increases, the arc expansion plate gradually compresses the inner wall of the connecting hole, the fastening force of the tension sleeve 411 is improved, the first expansion joint 412 and the second expansion joint 413 can be expanded for multiple times through continuous adjustment of the tightening nut 419, and the first expansion joint 412 and the second expansion joint 413 can provide fastening force. Effectively relieve the deformation of the soft surrounding rock, the concrete of the one end of the fastening structure fixed by the concrete pouring is broken, and the fastening force is weakened. When the concrete in the connecting hole is seriously broken, the tightening nut 419 can be loosened, the outer diameter of the first expansion joint 412 and the second expansion joint 413 becomes smaller, the drilling equipment is used to drill the concrete in the injection pipe 416, and the concrete is injected again through the injection pipe 416. After the concrete is solidified, the expansion of the first expansion joint 412 and the second expansion joint 413 can be used to improve the fastening force.

[0058] Specifically, the working principle of the tunnel soft surrounding rock large deformation supporting structure in the complex stress area is as follows: when the sealing plate 210 is installed, the connecting piece 220 passes through the two sides of the sealing plate 210, and then the clamping plate 230 is inserted into the connecting piece 220. As the clamping plate 230 is gradually inserted into the connecting piece 220, the clamping plate 230 gradually compresses the sealing plate 210, thereby achieving the purpose of fixing the sealing plate 210. When the sealing plate 210 needs to be disassembled, the clamping plate 230 is pulled out from the side wall of the connecting piece 220 to release the compression of the clamping plate 230 on the sealing plate 210, and then the two sides of the sealing plate 210 are pulled out from the connecting piece 220 to remove the sealing plate 210. Through the way that the clamping plate 230 clamps the compressed sealing plate 210, when the clamping plate 230 is too tight during disassembly, it only needs to be knocked out of the connecting piece 220 with a hammer. The disassembly process is simple, reduces violent damage, and reduces the inconvenience of disassembly caused by concrete.

[0059] Before the installation of the sealing plate 210, the connecting rod 221 is inserted from the side wall of the clamping groove 242, the clamping groove 242 blocks the rotating part 223, the connecting rod 221 passes through the fixed plate 212, then the clamping plate 230 is inserted into the pressing groove 222, the inclined surface of the clamping plate 230 is attached to the inclined surface of the pressing groove 222, when the clamping plate 230 is gradually inserted into the pressing groove 222, the clamping plate 230 presses the fixed plate 212, the clamping plate 230 blocks the inner wall of the steel arch 120, after the sealing plate 210 is disassembled, the connecting rod 221 is pulled out from the side wall of the clamping groove 242, the connecting rod 221 is removed, and the recycling of the connecting rod 221 is performed for reuse.

[0060] The connecting rope is tied on the hanging ring 370 on the stone collecting box 310, the connecting rope passes through the hanging ring 370 on the upper end of the stress releasing port 130, and the connecting rope is tied on the hanging ring 370, the connecting rope tightens the stone collecting box 310, the inner wall opening of the stone collecting box 310 is attached to the periphery of the stress releasing port 130, when the gravel in the stress releasing port 130 is extruded due to stress, it falls into the stone collecting box 310, when the gravel in the stone collecting box 310 needs to be discharged, the connection between the connecting rope and the hanging ring 370 on the upper end of the stress releasing port 130 is released, the stone collecting box 310 is lowered through the connecting rope, the stone collecting box 310 rotates around the hinge 320, the stone collecting box 310 falls down, the gravel in the stone collecting box 310 falls along the material guiding plate 340, and is collected, the gravel falling into the steel arch 120 is reduced, the situation that the gravel injures personnel is reduced, and the safety in the construction process is improved.

[0061] The drawing plate 340 is pressed against the inner wall of the steel arch 120, one end of the tension sleeve 411 is inserted into the connecting hole, concrete is injected into the injection pipe 416, the concrete extends to the end of the one end of the connecting hole, and the concrete fills the connecting hole and the stress release port 130. After the concrete is solidified, the gasket 420 is sleeved into the tension sleeve 411, and the compression nut 430 is screwed into the tension sleeve 411 until the compression nut 430 presses the gasket 420 against the side wall of the drawing plate 340. The drawing plate 340 disperses the pressure of the concrete structure near the injection pipe 416, and further realizes the effect of the drawing plate 340 dispersing the pressure. The drawing plate 340 has three functions. When the soft surrounding rock deforms, the concrete at one end of the fastening structure fixed by pouring concrete is broken, resulting in a decrease in the fastening force. The tightening nut 419 is tightened, the injection pipe 416 moves along the tension sleeve 411 through the screw transmission principle, the pressure of the tightening nut 419 and the second baffle 417 on both ends of the tension sleeve 411 increases, the arc of the arc-shaped expansion plate on the first expansion joint 412 and the second expansion joint 413 increases, the arc-shaped expansion plate gradually presses the inner wall of the connecting hole, the fastening force of the tension sleeve 411 is improved, the first expansion joint 412 and the second expansion joint 413 can be expanded multiple times through continuous adjustment of the tightening nut 419, and the first expansion joint 412 and the second expansion joint 413 can provide fastening force. Effectively alleviate the deformation of the soft surrounding rock, the concrete at one end of the fastening structure fixed by pouring concrete is broken, resulting in a decrease in the fastening force. When the concrete in the connecting hole is severely broken, the tightening nut 419 is loosened, the outer diameter of the first expansion joint 412 and the second expansion joint 413 is reduced, the concrete in the injection pipe 416 is drilled out using a drilling device, and the concrete is re-injected through the injection pipe 416. After the concrete is solidified, the first expansion joint 412 and the second expansion joint 413 can be used to increase the fastening force.

[0062] The above merely provides an embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0063] The above merely provides an embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. The above merely provides an embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

Claims

1. A large-deformation supporting structure for a tunnel in a complex stress zone with soft surrounding rock, characterized in that, The utility model relates to a tunnel assembly (100) comprising a surrounding rock body (110) and a steel arch (120) arranged in the surrounding rock body (110), the steel arch (120) being provided with a stress release opening (130), and a concrete layer (140) being arranged between the steel arch (120) and the surrounding rock body (110). The utility model relates to a sealing plate assembly (200) comprising a sealing plate (210), a plurality of connecting pieces (220) and a clamping plate (230), the sealing plate (210) being arranged on the inner wall of the steel arch (120), one end of the connecting piece (220) being fixed to the steel arch (120), the other end of the connecting piece (220) being slidably penetrated through the sealing plate (210) on both sides, the connecting pieces (220) being equidistantly arranged on both sides of the steel arch (120), and the upper end of the clamping plate (230) being provided with an inclined surface, the clamping plate (230) being slidably penetrated through the side wall of the connecting piece (220), and the clamping plate (230) being pressed against the inner wall of the steel arch (120). The sealing plate (210) comprises a plate body (211) and a plurality of fixed plates (212), the fixed plates (212) being equidistantly fixedly connected to both sides of the plate body (211), the connecting piece (220) being slidably penetrated through the fixed plate (212), the clamping plate (230) being pressed against the fixed plate (212), the steel arch (120) being fixedly connected with a mounting piece (240), the connecting piece (220) being arranged in the mounting piece (240), the mounting piece (240) comprising a first mounting plate (241), the first mounting plate (241) being provided with a clamping groove (242) at both ends, the connecting piece (220) comprising a connecting rod (221) and a rotating part (223), the connecting rod (221) being provided with a pressing groove (222) inside, the upper end of the pressing groove (222) being provided with an inclined surface inside, the clamping plate (230) being slidably inserted into the pressing groove (222), the inclined surface of the clamping plate (230) being matched with the inclined surface of the pressing groove (222), and the rotating part (223) being fixedly connected to one end of the connecting rod (221), the connecting rod (221) being inserted from the side wall of the clamping groove (242), and the clamping groove (242) being capable of stopping the rotating part (223). The sealing plate (210) is fixedly connected with a pouring piece (250).

2. The large-deformation supporting structure for a tunnel in a complex stress zone with weak surrounding rock according to claim 1, characterized in that, The pouring piece (250) comprises a pouring pipe (251) and a cover (252), the pouring pipe (251) being fixedly connected to the sealing plate (210), and the cover (252) being threadedly connected to one end of the pouring pipe (251) away from the sealing plate (210).

3. The large-deformation supporting structure for a tunnel in a complex stress zone with soft surrounding rock according to claim 2, characterized in that, The cover (252) is integrally injection molded by plastic.

4. The complex stress zone tunnel soft surrounding rock large deformation support structure according to claim 3, characterized in that, ​ 5. The complex stress zone tunnel soft surrounding rock large deformation support structure according to claim 3, characterized in that, The cover (252) comprises a cover body (2521) and a blocking rod (2522) fixedly connected in the cover body (2521), the blocking rod (2522) extends into the pouring pipe (251), and the cover body (2521) is threadedly sleeved at the end of the pouring pipe (251).

6. The complex stress zone tunnel soft surrounding rock large deformation support structure according to claim 5, characterized in that, The periphery of the cover body (2521) is uniformly provided with anti-skid strips (2523).

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