Subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load

Abstract

The invention provides a subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load, and belongs to the technical field of civil engineering tests. The subway tunnel surrounding rock dynamic response test device under the simulated cyclic dynamic load comprises a model box, a tunnel model and an adjusting assembly. The model box comprises a box body and a rock-soil body, and the rock-soil body is located in the box body; the tunnel model comprises a metal corrugated pipe, a vibration exciter, a vibration sensor and a pressure sensor, the metal corrugated pipe is located in the rock-soil body, and the vibration exciter is located in the metal corrugated pipe; the adjusting assembly comprises a lifting piece, a transverse adjusting piece, a longitudinal adjusting piece, an angle adjusting piece and an adjusting piece. According to the subway tunnel surrounding rock dynamic response test device under the simulated cyclic dynamic load, the corner angle of the subway tunnel model is changed under the same test condition, and the influence of subway tunnel surrounding stratum vibration caused by subway long-term operation vibration can be conveniently, accurately and truly simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of civil engineering test, in particular, to a test device for simulating dynamic response of surrounding rock of a subway tunnel under cyclic dynamic load. BACKGROUND

[0002] The subway train vibration load has the characteristics of large amplitude and high frequency. Under the long-term vibration load of the train, the tunnel lining structure of the subway tunnel may have problems such as longitudinal and transverse cracks caused by support cracking, spalling of the concrete at the top of the hole, and even deformation of the bottom uplift, and the surrounding soil under the long-term train load may also have problems such as sand liquefaction, uneven settlement and ground subsidence, which may cause uneven settlement deformation of the subway line along the running direction, and pose a potential safety risk to the normal operation of the subway train.

[0003] At present, the research on the dynamic response characteristics of the surrounding rock of the subway tunnel under the cyclic vibration load is mainly based on field measurement, empirical method and theoretical analysis, and there is also a lack of corresponding indoor model test on the dynamic response characteristics of the surrounding rock at different corner angles of the subway tunnel corner, which cannot truly and objectively reflect the dynamic response of the surrounding rock of the subway tunnel under different corner angles under the cyclic dynamic load.

[0004] How to invent a test device for simulating the dynamic response of the surrounding rock of the subway tunnel under the cyclic dynamic load to improve these problems has become a problem to be solved by those skilled in the art. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a test device for simulating the dynamic response of the surrounding rock of the subway tunnel under the cyclic dynamic load, which can conveniently, accurately and truly simulate the influence of the vibration of the surrounding stratum of the subway tunnel caused by the long-term operation vibration of the subway under the same test conditions.

[0006] The embodiment of the present application provides a test device for simulating the dynamic response of the surrounding rock of the subway tunnel under the cyclic dynamic load, which comprises a model box, a tunnel model and an adjusting assembly.

[0007] The model box comprises a box body and a rock-soil body, and the rock-soil body is located in the box body; the tunnel model comprises a metal bellows, an exciter, a vibration sensor and a pressure sensor, the metal bellows is located in the rock-soil body, the exciter is located in the metal bellows, the vibration sensor is fixedly connected to the inner wall of the metal bellows, and the pressure sensor is fixedly connected to the outer wall of the metal bellows.

[0008] The adjusting assembly comprises a lifting piece, a transverse adjusting piece, a longitudinal adjusting piece, an angle adjusting piece and an adjusting piece, the lifting piece is fixedly connected to the box, the transverse adjusting piece, the longitudinal adjusting piece and the angle adjusting piece are fixedly connected to the lifting piece, the transverse adjusting piece, the longitudinal adjusting piece and the angle adjusting piece are slidingly connected to the box, and the adjusting piece is located in the box.

[0009] In the implementation process, the metal bellows is placed in the box, the height of the adjusting piece is adjusted through the lifting piece, so that the distance of the metal bellows below the ground is controlled, the rotation angle of the metal bellows is adjusted through the transverse adjusting piece, the longitudinal adjusting piece and the angle adjusting piece, the rock-soil body is loaded into the box, the conditions below the ground are simulated, the vibration condition when the train runs is simulated through the vibration exciter, the vibration condition of the tunnel model is detected through the vibration sensor, and the vibration load induced when the train runs and the pressure of the surrounding stratum of the tunnel model are detected through the pressure sensor.

[0010] In some embodiments of the present application, the box comprises a fixed frame and a railing, and the railing is fixedly connected to the fixed frame.

[0011] In some embodiments of the present application, the fixed frame is provided with a lifting groove, and the fixed frame and the inner side of the railing are provided with a damping layer.

[0012] In the implementation process, the lifting groove is used for limiting the height of the rock-soil body, the damping layer is composed of a foamed plastic plate, a steel cushion plate and a polystyrene film, the semi-infinite boundary in the actual stratum is simulated, and the vibration wave reflection problem of the boundary is overcome.

[0013] In some embodiments of the present application, the inner side of the metal bellows is provided with a cushion block, and the vibration exciter is slidingly connected to the cushion block.

[0014] In the implementation process, the cushion block is used for facilitating the movement of the vibration exciter in the metal bellows.

[0015] In some embodiments of the present application, the lifting piece comprises a stand, a worm gear, a connecting barrel, a worm and a lifting lead screw, the stand is fixedly connected to the fixed frame, the connecting barrel is fixedly connected to the worm gear, the connecting barrel is rotationally connected to the stand, the lifting lead screw and the connecting barrel are threadedly and slidingly connected, and the worm and the worm gear are in mesh transmission.

[0016] In the implementation process, the worm is manually rotated, the worm and the worm gear are engaged in transmission, the rotation position of the worm gear is limited by the connecting cylinder, and the lifting screw rod is moved up and down.

[0017] In some embodiments of the present application, the operating box is fixedly connected to the upper side of the column, and the worm gear is located in the operating box.

[0018] In some embodiments of the present application, the connecting cylinder is provided with a threaded hole, the threaded hole and the lifting screw rod are arranged in pairs, the worm is rotationally connected to the operating box, and the worm is fixedly connected with a lifting hand wheel at one end.

[0019] In the implementation process, the lifting hand wheel is convenient for manual rotation adjustment.

[0020] In some embodiments of the present application, the lateral adjusting member includes a lateral screw rod, a first sliding block, a lateral sliding rod and a lateral frame, the lateral screw rod is rotationally connected to the lateral frame, the lateral screw rod is slidingly connected to the lifting groove, the first sliding block is rotationally connected to the lateral screw rod, the first sliding block is slidingly connected to the lateral frame, and the lateral sliding rod is fixedly connected to the first sliding block.

[0021] In the implementation process, the first sliding block is driven to slide on the lateral frame by rotating the lateral screw rod, the first sliding block drives the lateral sliding rod to move, and the lateral rotation angle of the metal bellows is adjusted.

[0022] In some embodiments of the present application, the lateral screw rod is fixedly connected with a lateral hand wheel at one end, and the lateral adjusting member and the longitudinal adjusting member are arranged perpendicular to each other.

[0023] In the implementation process, the lateral hand wheel is convenient for manual operation.

[0024] In some embodiments of the present application, the longitudinal adjusting member includes a longitudinal screw rod, a second sliding block, a longitudinal sliding rod and a longitudinal frame, the longitudinal screw rod is rotationally connected to the longitudinal frame, the longitudinal screw rod is slidingly connected to the other lifting groove, the second sliding block is rotationally connected to the longitudinal screw rod, the second sliding block is slidingly connected to the longitudinal screw rod, and the longitudinal sliding rod is fixedly connected to the second sliding block.

[0025] In the implementation process, the second sliding block is driven to move in the longitudinal frame by manually rotating the longitudinal screw rod, the position of the longitudinal sliding rod is adjusted, and the longitudinal rotation angle of the metal bellows is adjusted.

[0026] In some embodiments of the present application, the longitudinal hand wheel is fixedly connected to one end of the longitudinal screw rod, a fixed seat is arranged between the horizontal frame and the longitudinal frame, and the fixed seat is fixedly connected to the upper end of the lifting screw rod.

[0027] In the implementation process, the longitudinal hand wheel facilitates manual rotation of the longitudinal screw rod.

[0028] In some embodiments of the present application, the angle adjusting member comprises a third screw rod, a third sliding block, an adjusting slide rod and an adjusting frame, the third screw rod is rotationally connected to the adjusting frame, the third sliding block is rotationally connected to the third screw rod, the third sliding block is slidingly connected to the adjusting frame, one end of the adjusting slide rod is freely arranged, and the other end of the adjusting slide rod is rotationally connected to the third sliding block.

[0029] In some embodiments of the present application, the adjusting frame is fixedly connected to the longitudinal frame, the adjusting frame and the longitudinal frame are arranged perpendicularly, and the adjusting frame and the horizontal frame are arranged in parallel.

[0030] In some embodiments of the present application, the third hand wheel is fixedly connected to the other end of the third screw rod, a first moving block is rotationally connected to the upper side of the third sliding block, and the first moving block is slidingly connected to the adjusting slide rod.

[0031] In the implementation process, the third hand wheel facilitates manual rotation, the third sliding block is moved in the adjusting frame by rotating the third screw rod, and the rotation angle of the adjusting slide rod is adjusted by the first moving block.

[0032] In some embodiments of the present application, the adjusting member comprises a moving rod, a second moving block, a moving frame and a fixed rod, the moving rod is fixedly connected to the second moving block, the second moving block is slidingly connected to the adjusting slide rod, the horizontal slide rod and the longitudinal slide rod are slidingly connected to the moving rod, the moving frame is fixedly connected to the moving rod, the fixed rod is fixedly connected to the other side of the moving frame, the moving frame is in a triangular shape, and the metal bellows are located between the fixed rods.

[0033] In the implementation process, the position of the moving rod is adjusted by the horizontal adjusting member, the longitudinal adjusting member and the angle adjusting member, the moving rod drives the moving frame and the fixed rod to move, and the rotation angle of the metal bellows located between the fixed rods is adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0035] Figure 1 is a schematic diagram of a tunnel model and an adjusting assembly structure provided by the embodiments of the present application;

[0036] Figure 2 is a schematic diagram of a subway tunnel surrounding rock dynamic response test device structure under simulated cyclic dynamic load provided by the embodiments of the present application;

[0037] Figure 3 is a schematic diagram of a three-dimensional structure of an adjusting assembly provided by the embodiments of the present application;

[0038] Figure 4 is a schematic diagram of a first perspective view structure of an adjusting assembly provided by the embodiments of the present application;

[0039] Figure 5 is a schematic diagram of a second perspective view structure of an adjusting assembly provided by the embodiments of the present application;

[0040] Figure 6 is a schematic diagram of a third perspective view structure of an adjusting assembly provided by the embodiments of the present application;

[0041] Figure 7 is a schematic diagram of a box structure provided by the embodiments of the present application;

[0042] Figure 8 is a schematic diagram of a lifting member structure provided by the embodiments of the present application;

[0043] Figure 9 is a schematic diagram of a cross-sectional structure of a lifting member provided by the embodiments of the present application;

[0044] Figure 10 is a schematic diagram of an adjusting member structure provided by the embodiments of the present application;

[0045] Figure 11 is a schematic diagram of a cross-sectional structure of a subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load provided by the embodiments of the present application.

[0046] In the figure: 100 - model box; 110 - box body; 111 - fixing frame; 1111 - lifting groove; 112 - railing; 120 - damping layer; 130 - rock-soil body; 200 - tunnel model; 210 - metal bellows; 230 - cushion block; 250 - exciter; 260 - vibration sensor; 280 - pressure sensor; 300 - adjusting assembly; 310 - lifting piece; 311 - stand column; 312 - operation box; 313 - worm wheel; 314 - connecting cylinder; 3141 - threaded hole; 315 - worm; 316 - lifting hand wheel; 317 - lifting screw rod; 330 - transverse adjusting piece; 331 - transverse screw rod; 332 - first sliding block; 333 - transverse sliding rod; 334 - transverse hand wheel; 336 - transverse frame; 350 - longitudinal adjusting piece; 351 - longitudinal screw rod; 352 - second sliding block; 353 - longitudinal sliding rod; 354 - longitudinal hand wheel; 356 - longitudinal frame; 360 - fixing seat; 370 - angle adjusting piece; 371 - third screw rod; 372 - third sliding block; 373 - adjusting sliding rod; 374 - third hand wheel; 375 - first moving block; 376 - adjusting frame; 380 - adjusting piece; 381 - moving rod; 382 - second moving block; 383 - moving frame; 384 - fixing rod. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0048] In order 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 with reference to the accompanying drawings. Obviously, the described embodiments are only part 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 work fall within the scope of protection of the present application.

[0049] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying 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 work fall within the scope of protection of the present application.

[0050] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are 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.

[0052] 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 the 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.

[0053] 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 of 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.

[0054] 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.

[0055] The device for simulating the dynamic response test of subway tunnel surrounding rock under cyclic dynamic load according to the embodiments of the present application is described below with reference to the drawings.

[0056] Please refer to Figures 1-11 The present application provides a device for simulating the dynamic response test of subway tunnel surrounding rock under cyclic dynamic load, which comprises a model box 100, a tunnel model 200 and an adjusting assembly 300.

[0057] The tunnel model 200 is located in the model box 100, and the adjusting assembly 300 is fixedly connected to the model box 100, the tunnel model 200 is located at the bottom side of the adjusting assembly 300, the model box 100 is used for simulating the state that the tunnel model 200 is located underground, and the influence of the vibration of the surrounding stratum of the subway tunnel caused by the long-term operation of the subway is more truly simulated, the adjusting assembly 300 is used for adjusting the rotation angle of the tunnel model 200 located underground, and the research on the dynamic response characteristics of the surrounding rock at different rotation angles of the subway tunnel is facilitated.

[0058] Please refer to Figure 1 、 2 , 6, 7, the model box 100 comprises a box body 110 and a rock-soil body 130, and the rock-soil body 130 is located in the box body 110.

[0059] Specifically, the rock-soil body 130 is used for simulating the state below the ground.

[0060] Please refer to Figure 1 、 2 , 11, the tunnel model 200 comprises a metal bellows 210, a vibration exciter 250, a vibration sensor 260 and a pressure sensor 280, the metal bellows 210 is located in the rock-soil body 130, the vibration exciter 250 is located in the metal bellows 210, the vibration sensor 260 is fixedly connected to the inner wall of the metal bellows 210, and the pressure sensor 280 is fixedly connected to the circumferential side of the outer wall of the metal bellows 210.

[0061] Specifically, the metal bellows 210 is used for simulating the subway tunnel, facilitating folding and bending, the vibration sensor 260 is bolted to the inner wall of the metal bellows 210 and is used for monitoring the vibration of the tunnel model 200, the pressure sensor 280 is bolted to the outer surface of the metal bellows 210 and is used for monitoring the vibration load induced when the train runs and the pressure of the surrounding stratum of the tunnel model 200, and the vibration exciter 250 is used for simulating the vibration condition when the train runs.

[0062] Please refer to Figure 1 、 2 , 3, 4, 5, 6, 8, 9, 10, 11, the adjusting assembly 300 comprises a lifting piece 310, a transverse adjusting piece 330, a longitudinal adjusting piece 350, an angle adjusting piece 370 and an adjusting piece 380, the lifting piece 310 is fixedly connected to the box body 110, the transverse adjusting piece 330, the longitudinal adjusting piece 350 and the angle adjusting piece 370 are fixedly connected to the lifting piece 310, the transverse adjusting piece 330, the longitudinal adjusting piece 350 and the angle adjusting piece 370 are slidingly connected to the box body 110, and the adjusting piece 380 is located in the box body 110.

[0063] Specifically, the lifting member 310 is used to adjust the distance of the tunnel model 200 below the ground, the lateral adjusting member 330, the longitudinal adjusting member 350, the angle adjusting member 370 and the adjusting member 380 are used to adjust the rotation angle of the tunnel model 200 below the ground, and facilitate the calculation of the rotation angle, and facilitate the analysis.

[0064] The working process of the device for simulating the dynamic response of the surrounding rock of a subway tunnel under cyclic dynamic load according to the embodiment of the present application is described below with reference to the drawings.

[0065] The metal bellows 210 is placed in the box body 110, the height of the adjusting member 380 is adjusted by the lifting member 310, so as to facilitate the control of the distance of the metal bellows 210 below the ground, the rotation angle of the metal bellows 210 is adjusted by the lateral adjusting member 330, the longitudinal adjusting member 350 and the angle adjusting member 370, the rock-soil body 130 is loaded into the box body 110, the conditions below the ground are simulated, the vibration of the train running is simulated by the exciter 250, the vibration sensor 260 detects the vibration of the tunnel model 200, and the pressure sensor 280 detects the vibration load induced by the train running and the pressure of the surrounding stratum of the tunnel model 200. The device can truly simulate the influence of the vibration of the surrounding stratum of the subway tunnel caused by the long-term operation of the subway, and facilitate the research on the dynamic response characteristics of the surrounding rock of the subway tunnel at different rotation angles.

[0066] The device for simulating the dynamic response of the surrounding rock of a subway tunnel under cyclic dynamic load according to the embodiment of the present application is described below with reference to Figure 2 , 6 , 7, the box body 110 comprises a fixed frame 111 and a handrail 112, the handrail 112 is fixedly connected to the fixed frame 111, and it should be noted that the handrail 112 is bolted to the fixed frame 111.

[0067] The device for simulating the dynamic response of the surrounding rock of a subway tunnel under cyclic dynamic load according to the embodiment of the present application is described below with reference to Figure 2 , 6 , 7, the fixed frame 111 is provided with a lifting groove 1111, and the fixed frame 111 and the inner side of the handrail 112 are provided with a damping layer 120, specifically, the lifting groove 1111 is used to limit the height of the rock-soil body 130, and the damping layer 120 is composed of a foamed plastic plate, a steel cushion plate and a polystyrene film, which simulates the semi-infinite boundary in the actual stratum and overcomes the problem of reflection of vibration waves at the boundary.

[0068] The device for simulating the dynamic response of the surrounding rock of a subway tunnel under cyclic dynamic load according to the embodiment of the present application is described below with reference to Figure 11 , the inner side of the metal bellows 210 is provided with a pad 230, and the exciter 250 is slidingly connected to the pad 230, and it should be noted that the pad 230 is used to facilitate the movement of the exciter 250 in the metal bellows 210.

[0069] According to the embodiment of the application, the simulation of the dynamic response test device of the subway tunnel surrounding rock under the cyclic dynamic load, please refer to Figure 2 、 3 , 6, 8, 9, 11, the lifting piece 310 includes a column 311, a worm wheel 313, a connecting barrel 314, a worm 315 and a lifting lead screw 317, the column 311 is fixedly connected to the fixed frame 111, the connecting barrel 314 is fixedly connected to the worm wheel 313, the connecting barrel 314 is rotatably connected to the column 311, the lifting lead screw 317 is threadedly and slidably connected to the connecting barrel 314, the worm 315 is in meshing transmission with the worm wheel 313, and it should be noted that the column 311 is bolted to the fixed frame 111, and the worm wheel 313 is welded to the connecting barrel 314.

[0070] Specifically, the worm 315 is manually rotated, the worm 315 is in meshing transmission with the worm wheel 313, the worm wheel 313 is rotationally positioned by the connecting barrel 314, and the lifting lead screw 317 is moved up and down.

[0071] According to the embodiment of the application, the simulation of the dynamic response test device of the subway tunnel surrounding rock under the cyclic dynamic load, please refer to Figure 2 、 3 , 6, 8, 9, 11, the column 311 is fixedly connected with an operation box 312 on the upper side, and the worm wheel 313 is located in the operation box 312, and it should be noted that the operation box 312 is bolted to the column 311.

[0072] According to the embodiment of the application, the simulation of the dynamic response test device of the subway tunnel surrounding rock under the cyclic dynamic load, please refer to Figure 2 、 3 , 6, 8, 9, 11, the connecting barrel 314 is provided with a threaded hole 3141, the threaded hole 3141 is arranged in a matched mode with the lifting lead screw 317, the worm 315 is rotatably connected to the operation box 312, one end of the worm 315 is fixedly connected with a lifting hand wheel 316, and it should be noted that the lifting hand wheel 316 is welded to the worm 315, so as to facilitate manual rotation adjustment.

[0073] According to the embodiment of the application, the simulation of the dynamic response test device of the subway tunnel surrounding rock under the cyclic dynamic load, please refer to Figure 3 、 4 , 5, 6, the transverse adjusting piece 330 includes a transverse lead screw 331, a first sliding block 332, a transverse sliding rod 333 and a transverse frame 336, the transverse lead screw 331 is rotatably connected to the transverse frame 336, the transverse lead screw 331 is slidably connected to the lifting groove 1111, the first sliding block 332 is rotatably connected to the transverse lead screw 331, the first sliding block 332 is slidably connected to the transverse frame 336, and the transverse sliding rod 333 is fixedly connected to the first sliding block 332, and it should be noted that the transverse sliding rod 333 is bolted to the first sliding block 332.

[0074] Specifically, by rotating the transverse screw rod 331, the first sliding block 332 is driven to slide on the transverse frame 336, the first sliding block 332 drives the transverse slide rod 333 to move, and the transverse rotation angle of the metal bellows 210 is adjusted.

[0075] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load, please refer to Figure 3 、 4 , 5, 6, one end of the transverse screw rod 331 is fixedly connected with a transverse hand wheel 334, the transverse adjusting part 330 and the longitudinal adjusting part 350 are arranged perpendicular to each other, and it should be noted that the transverse hand wheel 334 is welded and fixed to one end of the transverse screw rod 331, so as to facilitate manual operation.

[0076] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load, please refer to Figure 3 、 4 , 5, the longitudinal adjusting part 350 comprises a longitudinal screw rod 351, a second sliding block 352, a longitudinal slide rod 353 and a longitudinal frame 356, the longitudinal screw rod 351 is rotatably connected to the longitudinal frame 356, the longitudinal screw rod 351 is slidably connected to the other lifting groove 1111, the second sliding block 352 is rotatably connected to the longitudinal screw rod 351, the second sliding block 352 is slidably connected to the longitudinal screw rod 351, and the longitudinal slide rod 353 is fixedly connected to the second sliding block 352. It should be noted that the longitudinal slide rod 353 is welded and fixed to the second sliding block 352.

[0077] Specifically, by manually rotating the longitudinal screw rod 351, the second sliding block 352 is driven to move in the longitudinal frame 356, the position of the longitudinal slide rod 353 is adjusted, and the longitudinal rotation angle of the metal bellows 210 is adjusted.

[0078] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load, please refer to Figure 3 、 4 , 5, one end of the longitudinal screw rod 351 is fixedly connected with a longitudinal hand wheel 354, a fixing seat 360 is arranged between the transverse frame 336 and the longitudinal frame 356, the fixing seat 360 is fixedly connected to the upper end of the lifting screw rod 317, and it should be noted that the longitudinal hand wheel 354 is welded and fixed to one end of the longitudinal screw rod 351, so as to facilitate manual rotation of the longitudinal screw rod 351, and the fixing seat 360 is welded and fixed to the lifting screw rod 317.

[0079] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load, please refer to Figure 2 、 3, 4, 5, 6, the angle adjusting part 370 comprises a third screw rod 371, a third sliding block 372, an adjusting slide rod 373 and an adjusting frame 376, the third screw rod 371 is rotationally connected to the adjusting frame 376, the third sliding block 372 is rotationally connected to the third screw rod 371, the third sliding block 372 is slidingly connected to the adjusting frame 376, one end of the adjusting slide rod 373 is freely arranged, and the other end of the adjusting slide rod 373 is rotationally connected to the third sliding block 372.

[0080] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load according to the embodiment of the application, please refer to Figure 2 、 3 , 4, 5, 6, the adjusting frame 376 is fixedly connected to the longitudinal frame 356, the adjusting frame 376 and the longitudinal frame 356 are vertically arranged, the adjusting frame 376 and the transverse frame 336 are parallelly arranged, and specifically, the adjusting frame 376 is bolted to the longitudinal frame 356.

[0081] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load according to the embodiment of the application, please refer to Figure 2 、 3 , 4, 5, 6, the other end of the third screw rod 371 is fixedly connected with a third hand wheel 374, and the upper side of the third sliding block 372 is rotationally connected with a first moving block 375, and the first moving block 375 is slidingly connected to the adjusting slide rod 373, and it should be noted that the third hand wheel 374 is welded and fixed to the third screw rod 371, so as to facilitate manual rotation by personnel.

[0082] Specifically, by rotating the third screw rod 371, the third sliding block 372 is driven to move in the adjusting frame 376, so that the rotation angle of the adjusting slide rod 373 changes, thereby adjusting the rotation angle of the adjusting slide rod 373 through the second moving block 382.

[0083] According to the subway tunnel surrounding rock dynamic response test device under the simulation of cyclic dynamic load according to the embodiment of the application, please refer to Figure 3 、 4 , 6, 10, 11, the adjusting part 380 comprises a moving rod 381, a second moving block 382, a moving frame 383 and a fixed rod 384, the moving rod 381 is fixedly connected to the second moving block 382, the second moving block 382 is slidingly connected to the adjusting slide rod 373, the transverse slide rod 333 and the longitudinal slide rod 353 are slidingly connected to the moving rod 381, the moving frame 383 is fixedly connected to the moving rod 381, and the fixed rod 384 is fixedly connected to the other side of the moving frame 383, the moving frame 383 is in a triangular shape, the metal bellows 210 is located between the fixed rods 384, and it should be noted that the moving frame 383 is welded and fixed to the bottom end of the moving rod 381, and the fixed rod 384 is welded and fixed to the other side of the moving frame 383.

[0084] Specifically, the position of the moving rod 381 is adjusted by the lateral adjusting member 330, the longitudinal adjusting member 350 and the angle adjusting member 370, the moving rod 381 drives the moving frame 383 and the fixed rod 384 to move, and the rotation angle of the metal bellows 210 between the fixed rods 384 is adjusted.

[0085] The working principle of the device for simulating the dynamic response test of the surrounding rock of a subway tunnel under a dynamic load is as follows: the metal bellows 210 is placed in the box 110, the worm 315 is manually rotated by the lifting hand wheel 316, the worm 315 and the worm gear 313 are engaged and driven, the worm gear 313 is rotated and the position is limited by the connecting cylinder 314, the lifting lead screw 317 is lifted and lowered, the height of the adjusting member 380 is adjusted, the distance of the metal bellows 210 below the ground is controlled, the lateral lead screw 331 is rotated by the lateral hand wheel 334, the first sliding block 332 is driven to slide on the lateral frame 336, the first sliding block 332 drives the lateral slide rod 333 to move, the lateral rotation angle of the metal bellows 210 is adjusted, the longitudinal lead screw 351 is manually rotated by the longitudinal hand wheel 354, the second sliding block 352 is driven to move in the longitudinal frame 356, the position of the longitudinal slide rod 353 is adjusted, the longitudinal rotation angle of the metal bellows 210 is adjusted, the third sliding block 372 is driven to move in the adjusting frame 376 by rotating the third lead screw 371, the rotation angle of the adjusting slide rod 373 is changed, the rotation angle of the adjusting slide rod 373 is adjusted by the second moving block 382, the position of the moving rod 381 is adjusted by the lateral adjusting member 330, the longitudinal adjusting member 350 and the angle adjusting member 370, the moving rod 381 drives the moving frame 383 and the fixed rod 384 to move, the rotation angle of the metal bellows 210 between the fixed rods 384 is adjusted, the rock-soil body 130 is loaded into the box 110, the conditions below the ground are simulated, the vibration of the train running is simulated by the exciter 250, the vibration of the tunnel model 200 is detected by the vibration sensor 260, the vibration load induced by the train running and the pressure of the surrounding stratum of the tunnel model 200 are detected by the pressure sensor 280, the influence of the vibration of the surrounding stratum of the subway tunnel induced by the long-term operation of the subway is truly simulated, and the research on the dynamic response characteristics of the surrounding rock at different rotation angles of the corner of the subway tunnel is facilitated.

[0086] It should be noted that the specific model and specifications of the metal bellows 210, the exciter 250, the vibration sensor 260 and the pressure sensor 280 need to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0087] The power supply and principle of the exciter 250, the vibration sensor 260 and the pressure sensor 280 are clear to those skilled in the art, and will not be described in detail here.

[0088] The above merely provides an example of the present application and is not intended 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.

[0089] The above merely provides an example of the present application and is not intended 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.

[0090] The above merely provides an example of the present application and is not intended 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.

[0091] Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The test device for the dynamic response of surrounding rock in subway tunnels under simulated cyclic dynamic loads is characterized by: include A model box (100), the model box (100) comprising a box body (110) and a rock and soil body (130), the rock and soil body (130) being located within the box body (110); A tunnel model (200), the tunnel model (200) comprising a metal bellows (210), a vibration exciter (250), a vibration sensor (260), and a pressure sensor (280); the metal bellows (210) is located in the rock mass (130); the vibration exciter (250) is located in the metal bellows (210); the vibration sensor (260) is fixedly connected to the inner wall of the metal bellows (210); and the pressure sensor (280) is fixedly connected to the outer wall of the metal bellows (210); An adjustment component (300) includes a lifting member (310), a transverse adjustment member (330), a longitudinal adjustment member (350), an angle adjustment member (370), and an adjustment member (380). The lifting member (310) is fixedly connected to the box (110). The transverse adjustment member (330), the longitudinal adjustment member (350), and the angle adjustment member (370) are fixedly connected to the lifting member (310). The transverse adjustment member (330), the longitudinal adjustment member (350), and the angle adjustment member (370) are slidably connected to the box (110). The adjustment member (380) is located inside the box (110).

2. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 1 is characterized in that: The box body (110) comprises a fixing frame (111) and a railing (112), and the railing (112) is fixedly connected to the fixing frame (111).

3. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 2 is characterized in that: The fixing frame (111) is provided with a lifting slot (1111), and a shock-absorbing layer (120) is provided inside the fixing frame (111) and the handrail (112).

4. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 1 is characterized in that: A cushion block (230) is provided inside the metal bellows (210), and the vibration exciter (250) is slidably connected to the cushion block (230).

5. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 3 is characterized in that: The lifting member (310) includes a column (311), a worm wheel (313), a connecting tube (314), a worm (315) and a lifting screw (317). The column (311) is fixedly connected to the fixed frame (111), the connecting tube (314) is fixedly connected to the worm wheel (313), the connecting tube (314) is rotatably connected to the column (311), the lifting screw (317) and the connecting tube (314) are threadedly connected, and the worm (315) and the worm wheel (313) are meshed and transmitted.

6. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 5 is characterized in that: An operating box (312) is fixedly connected to the upper side of the column (311), and the worm gear (313) is located in the operating box (312).

7. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 6 is characterized in that: The connecting tube (314) is provided with a threaded hole (3141), the threaded hole (3141) and the lifting screw rod (317) are arranged in pairs, the worm (315) is rotatably connected to the operating box (312), and one end of the worm (315) is fixedly connected to a lifting hand wheel (316).

8. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 7 is characterized in that: The transverse adjustment member (330) includes a transverse screw rod (331), a first slider (332), a transverse sliding rod (333) and a transverse frame (336), wherein the transverse screw rod (331) is rotatably connected to the transverse frame (336), the transverse screw rod (331) is slidably connected to the lifting groove (1111), the first slider (332) is rotatably connected to the transverse screw rod (331), the first slider (332) is slidably connected to the transverse frame (336), and the transverse sliding rod (333) is fixedly connected to the first slider (332).

9. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 8, characterized in that: One end of the transverse screw rod (331) is fixedly connected to a transverse hand wheel (334), and the transverse adjustment member (330) and the longitudinal adjustment member (350) are arranged perpendicular to each other.

10. The subway tunnel surrounding rock dynamic response test device under simulated cyclic dynamic load according to claim 9, characterized in that: The longitudinal adjustment member (350) includes a longitudinal screw rod (351), a second slider (352), a longitudinal sliding rod (353) and a longitudinal frame (356), wherein the longitudinal screw rod (351) is rotatably connected to the longitudinal frame (356), the longitudinal screw rod (351) is slidably connected to another lifting groove (1111), the second slider (352) is rotatably connected to the longitudinal screw rod (351), the second slider (352) is slidably connected to the longitudinal screw rod (351), and the longitudinal sliding rod (353) is fixedly connected to the second slider (352).

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