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CN-117513072-B - Self-adaptive structure system for tunnel crossing movable fault

CN117513072BCN 117513072 BCN117513072 BCN 117513072BCN-117513072-B

Abstract

The invention discloses a tunnel crossing movable fault self-adaptive structure system which comprises a tunnel structure, a safety space, a track system and a self-adaptive support system, wherein when a movable fault is staggered, the downward moving surrounding rock is lower surrounding rock, the safety space is arranged between the track system and the tunnel structure of the lower surrounding rock, the self-adaptive support system is arranged in the safety space, the self-adaptive support system comprises gear devices arranged on two sides of the track system, the gear devices are connected with the tunnel structure and the track system, after the movable fault is staggered, the lower surrounding rock moves downward, the upper surrounding rock supports the track system upward, the track system moves upward relative to the lower surrounding rock, and the gear devices have a braking function to provide vertical supporting force for the track system arranged in the lower surrounding rock tunnel structure and keep the vertical direction position of the track system unchanged. The invention can realize the self-adaptive adjustment function according to fault dislocation quantity, maintain the flatness of the track system in the longitudinal direction, and ensure that the fault dislocation quantity is reasonably distributed in the tunnel section.

Inventors

  • LI GEN
  • JIANG SHUAI
  • TANG CHUNAN
  • WANG ZHONGTAO
  • LI LIANCHONG
  • DU KUN
  • LV ZHONGRONG

Assignees

  • 大连理工大学

Dates

Publication Date
20260505
Application Date
20231109

Claims (9)

  1. 1. The tunnel crossing movable fault self-adaptive structure system is characterized by comprising a tunnel structure (1), a safety space (2), a track system (3) and a self-adaptive support system (4); The tunnel structure (1) is arranged in the movable fault (5) in a penetrating manner, the track system (3) is arranged in the tunnel structure (1), when the movable fault moves, the surrounding rock moving downwards is a lower disc surrounding rock (6), the safety space (2) is arranged between the track system and the tunnel structure arranged on the lower disc surrounding rock, and the self-adaptive support system (4) is arranged in the safety space (2); When the movable fault moves, the lower disc surrounding rock (6) moves downwards, the upper disc surrounding rock (7) can generate upward supporting force on the track system (3), the track system (3) moves upwards relative to the tunnel structure in the lower disc surrounding rock (6), the gear device has a braking function, can provide vertical supporting force for the track system (3) arranged in the tunnel structure (1) of the lower disc surrounding rock (6), and can prevent the track system (3) from moving downwards relative to the upper disc surrounding rock (7) and keep the position of the track system (3) in the vertical direction unchanged; the gear device comprises a braking duplex gear structure (8), a plurality of turning gear structures (9), a bearing crawler belt (10) and an anchor rod (12); The anchor rod (12) is fixed on the inner wall of the tunnel structure (1), and the braking duplex gear structure and the turning gear structure are connected with the anchor rod (12); the force bearing crawler belt passes through the braking duplex gear structure and the change gear structure, and two ends of the force bearing crawler belt are respectively fixedly connected with the upper part and the lower part on the same side of the track system (3); The brake duplex gear structure (8) comprises a second rotating gear (81), a brake gear (82) coaxially connected with the second rotating gear and a brake tongue (83) arranged on the upper side of the brake gear (82), wherein the second rotating gear (81), the brake gear (82) and the brake tongue (83) are rotatably arranged on a second fork-shaped bracket (84) connected with the anchor rod, when the brake gear (82) is forced to rotate in a direction far away from the track system (3), the free end of the brake tongue (83) is lapped on teeth of the brake gear (82), and when the brake gear (82) receives a force for enabling the brake gear to rotate in a direction close to the track system (3), the free end of the brake tongue (83) is inserted between adjacent teeth of the brake gear (82) so as to prevent the brake gear (82) from rotating reversely; The turning gear structure (9) comprises a first rotating gear (91) and a first fork type support (92), wherein the first rotating gear (91) is rotatably arranged on the first fork type support (92) connected with the anchor rod, and the bearing crawler belt (10) is wound on the first rotating gear (91) and the second rotating gear (81) and is meshed with the first rotating gear (91) and the second rotating gear (81); When activity fault (5) is dislocated, lower wall surrounding rock (6) moves down, upper wall surrounding rock (7) upwards supports track system (3), track system (3) upwards move for the tunnel structure in lower wall surrounding rock (6), first rotation gear (91), brake gear (82) and second rotation gear (81) are to keeping away from the direction rotation of track system (3), and one side downward movement of track system (3) is kept away from to bearing track (10), and after activity fault (5) is dislocated, the free end of brake tongue (83) is inserted and is located between the tooth that brake gear (82) are adjacent, prevent brake gear (82), first rotation gear (91), second rotation gear (81) to be close to the direction rotation of track system (3).
  2. 2. The tunnel crossing active fault self-adaptive architecture according to claim 1, characterized in that the free end of the braking tongue (83) is arranged at a side remote from the track system (3), and the connecting end of the braking tongue (83) is arranged at a side close to the track system (3).
  3. 3. The tunnel crossing active fault self-adaptive structure system according to claim 1, wherein the braking duplex gear structure (8) further comprises a second rotating shaft (85) and a third rotating shaft (86), one end of the second binary bracket (84) is fixed on the inner wall of the tunnel structure through the anchor rod (12), the second rotating shaft (85) is arranged at the other end, the second rotating gear (81) and the braking gear (82) are rotatably arranged on the second rotating shaft (85) in sequence along the axial direction of the second rotating shaft (85), the third rotating shaft (86) is arranged on the second binary bracket (84) and is arranged on the upper side of the braking gear (82), the third rotating shaft (86) is parallel to the second rotating shaft (85), the connecting end of the braking tongue (83) is rotatably connected with the third rotating shaft (86), and the height of the free end of the braking tongue (83) is lower than the height of the connecting end of the braking tongue (83); The turning gear structure (9) further comprises a first rotating shaft (93), one end of the first fork type support (92) is fixedly connected with one end of the anchor rod (12), the first rotating shaft (93) is arranged at the other end of the first fork type support, and the first rotating gear (91) is rotatably arranged on the first rotating shaft (93).
  4. 4. The tunnel crossing active fault self-adaptive structural system according to claim 1, wherein the track system (3) arranged in the tunnel structure (1) of a lower wall surrounding rock (6) comprises a cross beam (31), a longitudinal beam (32), a sleeper (33) and a track (34) which are sequentially arranged from bottom to top, wherein the cross beam (31) and the sleeper (33) are transversely arranged in parallel, the longitudinal beam (32) and the track (34) are arranged in parallel and are perpendicular to the cross beam (31), and the track (34) is fixedly connected with the sleeper (33) through a fixing fastener (35); The sleepers (33) and the rails (34) of the rail system (3) arranged on the lower disc surrounding rock (6) extend into the tunnel structure (1) of the upper disc surrounding rock (7), and the sleepers (33) arranged in the tunnel structure (1) of the upper disc surrounding rock (7) are fixed at the arch bottom of the tunnel structure (1); the bearing crawler belt is connected with the upper side and the lower side of the cross beam (31) through a fixing structure (11) respectively.
  5. 5. The tunnel traversing active fault adaptive architecture according to claim 1, wherein the inner wall profile of the longitudinal section of the safety space (2) is an S-shaped curve, the longitudinal length L of which shall satisfy the following formula: (1) where f is the estimated fault amount and tan θ is the maximum error gradient allowed by the track design.
  6. 6. The tunnel traversing active fault adaptive architecture according to claim 1, characterized in that the safety space (2) has a circular or horseshoe shape in transverse cross-section.
  7. 7. The tunnel crossing active fault self-adaptive structure system according to claim 4, wherein the upper side and the lower side of the cross beam (31) are respectively provided with the fixing structure (11), two ends of the bearing crawler (10) are respectively connected with the fixing structure (11), the fixing structure (11) comprises a bolt (111) and a pair of connecting lugs (112) fixed on the cross beam (31) at intervals, the connecting lugs (112) are provided with bolt holes, the end parts of the bearing crawler (10) are provided with connecting holes, the end parts of the bearing crawler (10) are arranged between the pair of connecting lugs (112), and the bolt (111) passes through the bolt holes on the connecting lugs (112) and the connecting holes on the bearing crawler (10) to enable the bearing crawler (10) to be hinged with the connecting lugs (112).
  8. 8. The tunnel-traversing active fault-adaptive architecture according to claim 1, wherein the diameter of the braking gear (82) is greater than the diameter of the second rotation gear (81).
  9. 9. The tunnel traversing active fault adaptive architecture according to claim 1, wherein the tunnel structure (1) comprises a highway tunnel or a railway tunnel.

Description

Self-adaptive structure system for tunnel crossing movable fault Technical Field The invention relates to the technical field of tunnel construction, in particular to a tunnel crossing active fault self-adaptive structure system. Background Dislocation of faults can cause cracks, overlarge deformation and damage to the tunnel, and the safety of the tunnel structure and the later-stage safe operation are seriously affected. Therefore, when the tunnel passes through the active fault, a necessary anti-fault structure system is designed, and the anti-fault capacity of the tunnel is particularly important to be enhanced. The tunnel in the prior art mainly adopts a mode when crossing the active fault and has the following defects: Firstly, the method can be wound, and after the early geological survey, the faults (Song Yuxiang, liu Yong, main braiding, tunnel engineering, beijing: china building industry Press. 2018: 34-36) are avoided as much as possible when the tunnel is selected, but the method is limited by geographical conditions, and is only suitable for partial engineering construction; secondly, the rigidity of the tunnel is enhanced by rigid protective measures (such as increasing the strength of materials, anchor spraying support and the like) so as to resist additional loads applied to the structure due to fault dislocation (Deng Zhongfu. Segmental tunnel design parameters and safety analysis under fault dislocation [ J ]. Western traffic science and technology, 2021, no.162 (01): 126-130.), but the method greatly increases the construction cost, and practice proves that the effect of the method is not remarkable; thirdly, a flexible connecting section is arranged, and a tunnel adopts a plurality of more flexible materials or structures near the fault layer so that the tunnel can deform along with the fault movement, thereby achieving the purpose of reducing the additional internal force (Li Guoliang, zhang Jing, liu Guoqing, and the like) generated by the fault movement; CN111810189B, 2022-03-18.), but the method is greatly deformed due to fault dislocation, and cannot meet the requirement of some tunnels for deformation (for example, high-speed railway tunnels, etc.); Fourth, the super-digging design, through enlarging the tunnel section to meet the normal use function when the dislocation, the enlargement is determined according to the dislocation amount of the fault (Jiang Shubing, li Peng, lin Zhi. The anti-break design countermeasure of the tunnel crossing the active fault area [ J ]. Chongqing university of traffic (Nature science edition), 2008,27 (06): 1034-1036+1041 ]), but the method still cannot avoid the dislocation of the tunnel structure at the fault position and needs regular repair. Therefore, when fault dislocation can be realized, the dislocation amount can be automatically and reasonably transferred and distributed to the designed tunnel section according to the dislocation amount of the fault, and a stable and flat self-adaptive structural system for keeping the position of the track in the longitudinal direction is needed. Disclosure of Invention The present invention provides a tunnel traversing active fault adaptive architecture to solve the above-mentioned problems. In order to achieve the above object, the technical scheme of the present invention is as follows: A tunnel crossing active fault self-adaptive structure system comprises a tunnel structure, a safety space, a track system and a self-adaptive support system; the tunnel structure penetrates through the movable fault layer, the track system is arranged in the tunnel structure, when the movable fault is staggered, the surrounding rock moving downwards is a lower surrounding rock, the safety space is arranged between the track system and the tunnel structure arranged on the lower surrounding rock, and the self-adaptive support system is arranged in the safety space; When the movable fault moves, the lower disc surrounding rock moves downwards, the upper disc surrounding rock can generate upward supporting force on the track system, the track system moves upwards relative to the tunnel structure in the lower disc surrounding rock, the gear device has a braking function, can provide vertical supporting force for the track system arranged in the tunnel structure of the lower disc surrounding rock, can prevent the track system from moving downwards relative to the upper disc surrounding rock, and keeps the position of the track system in the vertical direction unchanged. Further, the gear device comprises a braking duplex gear structure, a plurality of turning gear structures, a bearing crawler belt and an anchor rod; The anchor rod is fixed on the inner wall of the tunnel structure, and the braking duplex gear structure and the turning gear structure are connected with the anchor rod; The bearing crawler passes through the braking duplex gear structure and the turning gear structure, and two ends of the bearing crawler are