CN117309294A - High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device - Google Patents

High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device Download PDF

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Publication number
CN117309294A
CN117309294A CN202311255338.7A CN202311255338A CN117309294A CN 117309294 A CN117309294 A CN 117309294A CN 202311255338 A CN202311255338 A CN 202311255338A CN 117309294 A CN117309294 A CN 117309294A
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China
Prior art keywords
box
fault
ground stress
sliding
uniform
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CN202311255338.7A
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Chinese (zh)
Inventor
何川
姚超凡
刘语泉
罗旺
耿萍
王天强
张迎宾
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Southwest Jiaotong University
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Southwest Jiaotong University
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Priority to CN202311255338.7A priority Critical patent/CN117309294A/en
Publication of CN117309294A publication Critical patent/CN117309294A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a high ground stress tunnel inconsistent earthquake excitation and fault dislocation test device, which comprises a fault sliding dislocation system, a high ground stress field loading control system and an inconsistent earthquake excitation system, wherein the fault sliding dislocation system is connected with the high ground stress field loading control system; the fault walk-slip dislocation system is connected with the non-uniform seismic excitation system, and the non-uniform seismic excitation system applies non-uniform seismic excitation to the fault walk-slip dislocation system; the high-ground stress field loading control system is arranged in the fault sliding and sliding system, and the fault sliding and sliding system is used for simulating the sliding and sliding of the fault and applying high-ground stress to the soil sample in the high-ground stress field loading control system. The invention is provided with the fault sliding and sliding system, the high-ground stress field loading control system and the inconsistent earthquake excitation system, and the fault sliding and sliding system, the high-ground stress field and the inconsistent earthquake excitation are organically coupled through the cooperation of the three systems, so that the structural mechanical characteristics of the high-ground stress sliding and sliding fault tunnel can be effectively simulated and researched.

Description

High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device
Technical Field
The invention belongs to the technical field of large-scale underground engineering model tests, and particularly relates to a high-ground-stress tunnel inconsistent earthquake excitation and fault dislocation test device.
Background
Deep buried tunnels are a key component of modern traffic and infrastructure engineering, often requiring crossing areas of complex geologic structures, including high-ground stress areas and mobile strike-slip faults, mobile fracture zones are prone to seismic activity, which can lead to serious safety hazards for tunnel structures, traditional test devices often have difficulty simulating real seismic conditions for non-uniform seismic excitation and complex fault-slip in deep buried tunnels, and existing devices have difficulty considering high-ground stress, fault-slip and seismic excitation together. Therefore, the invention constructs a novel large-scale fault device which is used for simulating the crossing activity fracture of the deep-buried tunnel and is beneficial to the anti-seismic and anti-fault study of the deep-buried tunnel.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-ground-stress tunnel non-uniform earthquake excitation and fault dislocation test device, so as to solve the problem that the conventional device is difficult to combine high ground stress, fault dislocation and earthquake excitation.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a high ground stress tunnel inconsistent earthquake excitation and fault dislocation test device comprises a fault walk-slip dislocation system, a high ground stress field loading control system and an inconsistent earthquake excitation system; the fault walk-slip dislocation system is connected with the non-uniform seismic excitation system, and the non-uniform seismic excitation system applies non-uniform seismic excitation to the fault walk-slip dislocation system; the high-ground stress field loading control system is arranged in the fault sliding and sliding system, and the fault sliding and sliding system is used for simulating the sliding and sliding of the fault and applying high-ground stress to the soil sample in the high-ground stress field loading control system.
Further, the fault walk-slip dislocation system comprises at least two driving boxes, at least one follow-up box, a plurality of thrusters and a plurality of counter-force devices which are arranged on the non-uniform earthquake excitation system; the follow-up box is arranged between the two driving boxes, and the follow-up box is flexibly connected with the driving boxes through a shear joint rubber; the pushing devices are symmetrically arranged on two sides of one driving box, and the pushing devices apply horizontal driving force to the driving box; the pushing device is arranged on the counter-force device.
Further, the driving box comprises front and rear box plates, side box plates and an edge bottom plate; the front box plate, the rear box plate and the side box plates are connected through bolts; the front and rear box plates and the side box plates are respectively provided with a plurality of soil pressure loading oil tank hole sites matched with the pushing device; the side bottom plates are respectively connected with the rear box plate and the side box plates above, and are movably arranged on the non-uniform earthquake excitation system.
Further, the pushing device is a hydraulic cylinder; the reaction force device comprises a reaction force supporting frame; the hydraulic oil cylinder is fixed on the counter-force supporting frame, and a piston rod of the hydraulic oil cylinder penetrates through a hole site of the soil pressure loading oil tank and is loaded on the high-ground stress field loading control system.
Further, the high ground stress field loading control system comprises a plurality of reaction frames and a plurality of loading plates; a plurality of reaction frames are arranged above the front box plate and the rear box plate, and vertical soil pressure loading oil cylinders are arranged on the reaction frames; the plurality of loading plates are all arranged in the driving box body, and form a loading space of the soil sample; the loading plate bears the driving force of the hydraulic oil cylinder in the horizontal direction and the vertical soil pressure loading oil cylinder in the vertical direction so as to apply high-altitude stress to soil samples in the driving box and the follow-up box.
Further, the non-uniform seismic excitation system includes a vibratory table and a follower support device; the driving box is arranged on the vibrating table, and the vibrating table applies vibration with preset frequency, amplitude and time to the driving box; the follow-up supporting device supports the follow-up box.
Further, the vibrating table comprises a main vibrating table and at least two additional vibrating tables; the main vibration table is connected with one driving box through a mounting plate, and the additional vibration table is connected with other driving boxes through the mounting plate.
Further, the mounting plate and the main vibration table are bolted through reserved bolt holes; the bottom of the driving box is provided with a sliding rail which is embedded into a T-shaped groove arranged on the mounting plate.
Further, the sliding rail is a heavy linear guide rail which is used for horizontally sliding the driving box on the main vibrating table.
Further, the follow-up bearing device comprises an upper frame body, a heavy spring and a ground frame; the upper part of the upper frame body is movably connected with the servo box through a plurality of heavy universal balls; the heavy spring and the ground frame are sequentially arranged below the upper frame body.
The high-ground-stress tunnel inconsistent earthquake excitation and fault dislocation test device provided by the invention has the following beneficial effects:
1. the invention is provided with the fault sliding and sliding system, the high-ground stress field loading control system and the inconsistent earthquake excitation system, and the fault sliding and sliding system, the high-ground stress field and the inconsistent earthquake excitation are organically coupled through the cooperation of the three systems, so that the structural mechanical characteristics of the high-ground stress sliding and sliding fault tunnel can be effectively simulated and researched.
2. The invention solves the problem that different ground stress fields cannot be applied to different sections of the deep buried fault in the traditional fault model test, also solves the problem that the earthquake excitation cannot be coupled with high ground stress, can simulate the crossing activity fracture of the deep buried tunnel closest to the actual situation, and can research the fault-resistant and earthquake-resistant design of the crossing active fault of the deep buried tunnel on the basis.
3. The follow-up box can be assembled through the front box plate and the rear box plate with different angles, so that the sliding fault dislocation under different inclination angles is realized, and the test types are rich.
4. The large-scale model test device can realize loading and unloading through the automatic control system, does not need to input excessive manpower for operation, and is convenient and fast to operate
Drawings
FIG. 1 is a top view of a high ground stress tunnel non-uniform seismic excitation and fault dislocation test apparatus of the present invention.
FIG. 2 is an elevation view of the high earth stress tunnel non-uniform seismic excitation and fault dislocation test apparatus of the present invention.
FIG. 3 is a schematic diagram of the connection of the main vibration table and the active box of the high ground stress tunnel non-uniform earthquake excitation and fault dislocation test device.
FIG. 4 is a schematic diagram of the connection of a follower support device and a follower box of the high-ground stress tunnel non-uniform seismic excitation and fault dislocation test device of the invention.
FIG. 5 is an isometric view of a high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus of the present invention.
Wherein,
1. an active box; 1-1, front and rear box boards; 1-2, side box plates; 1-3, edge bottom plates; 1-4, sliding rails;
2. a follower box; 3. a pushing device; 4. a reaction force device; 5. a segmented support frame; 6. a reaction frame; 7. a loading plate;
8. a vibration table; 8-1, mounting plates; 8-2, a main vibration table; 8-3, adding a vibrating table; 8-4, cushion blocks;
9. a follow-up bearing device; 9-1, upper frame body; 9-2, heavy springs; 9-3, a ground frame; 9-4, heavy universal ball;
10. and (5) cutting the seam rubber.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
In the case of example 1,
the embodiment provides a high ground stress tunnel inconsistent seismic excitation and fault dislocation test device, which couples fault sliding dislocation, high ground stress field and inconsistent seismic excitation, can effectively simulate and research structural mechanical properties of the high ground stress sliding fault tunnel, and specifically comprises the following steps of:
fault walk-slip dislocation system, high ground stress field loading control system and inconsistent earthquake excitation system;
the fault walk-slip dislocation system is connected with the non-uniform earthquake excitation system, and the non-uniform earthquake excitation system applies non-uniform earthquake excitation to the fault walk-slip dislocation system; the high-ground stress field loading control system is arranged in the fault sliding and sliding system, and the fault sliding and sliding system is used for simulating the sliding and sliding of the fault and applying high-ground stress to the soil sample in the high-ground stress field loading control system.
Specifically, the present embodiment will describe each of the above systems in detail;
a fault walk-slip dislocation system;
referring to fig. 1, 3 and 4, the fault sliding and moving system is used for simulating sliding and moving fault, and the pushing device 3 pushes the driving box 1 with the assistance of the linear guide rail so as to realize horizontal sliding and moving fault;
specifically, the system comprises at least two driving boxes 1, at least one follow-up box 2, a plurality of thrusters 3 and a plurality of counterforce devices 4 which are arranged on a non-uniform earthquake excitation system;
the driving boxes 1 are used for simulating upper and lower disc areas of faults, the follow-up boxes 2 are used for simulating fault zones, the follow-up boxes 2 are arranged between the two driving boxes 1, and the follow-up boxes 2 are flexibly connected with the driving boxes 1 through the shear joint rubber 10; the pushing devices 3 are symmetrically arranged on two sides of the driving box 1, and the pushing devices 3 apply horizontal driving force to the driving box 1; the pushing device 3 is arranged on the counter-force device 4.
The driving box 1 comprises front and rear box plates 1-1, side box plates 1-2 and side bottom plates 1-3; the front box plate 1-1 and the rear box plate 1-2 are connected with the side box plate 1-2 through bolts; the front and rear box plates 1-1 and the side box plates 1-2 are respectively provided with a plurality of soil pressure loading oil tank hole sites matched with the pushing device 3; the side bottom plates 1-3 are respectively connected with the rear box plate and the side box plates 1-2 above, and the side bottom plates 1-3 are movably arranged on the non-uniform earthquake excitation system.
The front and rear box plates 1-1 and the side box plates 1-2 are provided with bolt holes, and the front and rear box plates 1-1 and the side box plates 1-2 are fixedly connected through the bolt holes; in addition, the bolt holes above the front and rear box plates 1-1 are used to connect the upper load beam, i.e., the reaction frame 6.
The box body of the active box 1 is used as a frame of a fault upper disc, a fault lower disc and a fault zone, and is used as a soil filling frame on one hand, namely, is used as a bearing space of a soil sample; on the one hand, a reaction force device 4 for horizontally loading the stress is used. The slide rail 1-4 is a linear guide rail arranged below the side bottom plate 1-3, can bear a certain torque, and can realize high-precision linear motion under the condition of high load.
As a preference of this embodiment, the slide rail 1-4 can be installed into a T-shaped slot of the mounting plate 8-1 on top of the vibrating table 8 to achieve connection; the slide rail 1-4 is a heavy linear guide rail arranged below the side bottom plate 1-3, and can realize the horizontal sliding of the driving box 1 on the main vibrating table 8-2.
For the convenience of installation and use, the following box 2 adopts the same structure and connection mode as the driving box 1, namely the assembly parts of the following box 2 are basically the same as the driving box 1, and the difference is that the following box 2 lacks structural characteristics of a side box plate 1-2, a side bottom plate 1-3, a sliding rail 1-4 and the like; the follower box 2 is placed on a follower support means 9 on which the follower box 2 can be moved in three directions with six degrees of freedom.
In this embodiment, the vibration table 8 is used to apply vibration with a predetermined frequency, amplitude and time to the active tank 1, so as to simulate an earthquake, and the follow-up tank 2 performs follow-up vibration along with the vibration of the active tank 1.
The pushing device 3 is a hydraulic oil cylinder and is used for providing driving force in the horizontal direction; the driving box 1 on the main vibration table 8-2 is pushed to move, two hydraulic cylinders are respectively arranged in front of and behind the box body of the driving box 1, the front and the rear hydraulic cylinders work circularly to realize the cyclic loading of the sliding fault dislocation, and meanwhile, the box body of the driving box 1 can return to the original position after the test.
As one preferable example of this embodiment, the hydraulic cylinder in the pushing device 3 is a front flange cylinder, and is connected to the mounting frame through a flange during assembly.
The reaction force device 4 comprises a reaction force supporting frame which is fixed on the table surface of the test table by welding; the hydraulic cylinder is fixed on the counterforce supporting frame and is used for installing the hydraulic cylinder in the horizontal direction and providing counterforce support for horizontal displacement loading.
A high ground stress field loading control system;
the high-ground stress field loading control system can apply pressure to all directions of a soil layer in the driving box 1 and is used for simulating a high-ground stress field of a real deep-buried tunnel;
referring to fig. 2, 3 and 4, the high ground stress field loading control system comprises a segmented support frame 5, a plurality of reaction frames 6 and a plurality of loading plates 7; a plurality of reaction frames 6 are arranged above the front box plate 1 and the rear box plate 1, and vertical soil pressure loading cylinders are arranged on the reaction frames 6; the loading plates 7 are all arranged in the driving box 1, and the loading plates 7 form a loading space of the soil sample; the loading plate 7 bears the pushing force of the hydraulic cylinder in the horizontal direction and the vertical soil pressure loading cylinder in the vertical direction so as to apply high ground stress to the soil samples in the driving box 1 and the following box 2.
Specifically, the sectional supporting frame of the embodiment is a frame structure formed by the box plates of the driving box 1 and the follow-up box 2 in the fault sliding system, and is a frame foundation for realizing high ground stress loading, and the inside of the sectional supporting frame is provided with an oil cylinder hole site as a loading foundation.
The ground stress field of the fault zone area is often lower than the ground stress level of the upper disc and the lower disc, and the sectional support of the embodiment can apply different ground stress fields to the upper disc, the lower disc and the fault zone area so as to simulate the high ground stress field of a real deep buried fault.
The reaction frame 6 is used for installing a vertical soil pressure loading oil cylinder and providing a reaction force for the vertical soil pressure loading oil cylinder; specifically, reaction frame 6 installs at initiative case 1 and follow-up case 2 top, and the tip of reaction frame 6 is bolted with initiative case 1, follow-up case 2 top through reserving supporting bolt hole therebetween, simultaneously, reaction frame 6 provides the frame support for vertical high ground stress loading.
The loading plate 7 adopts a multi-section block splicing type, so that the sectional type, layered splicing combination and sectional type multi-point loading are supported. The device bears the driving force of a horizontal loading oil cylinder and a vertical loading oil cylinder, and realizes the application of soil sample stress in the driving box 1. In specific application, a layer of plastic film is added between the loading plate 7 and the soil layer, and lubricating oil is smeared on two sides of the plastic film, so that the axial loading plate 7 can not generate tangential constraint force on the surface of the loaded material. At first, the soil sample is arranged in a space formed by the loading plate 7, and then the loading plate 7 is pushed by the hydraulic oil cylinder and the vertical soil pressure loading oil cylinder to realize high-ground stress application to the integral fault area.
A non-uniform seismic excitation system;
the non-uniform earthquake excitation system applies non-uniform earthquake excitation to different areas of the fault through a vibrating table 8 at the bottom of the model;
referring to fig. 1, 2 and 5, the non-uniform seismic excitation system includes a vibratory table 8 and a follower cradle device 9; the driving box 1 is arranged on the vibrating table 8, and the vibrating table 8 applies vibration with preset frequency, amplitude and time to the driving box 1; the follower supporting means 9 supports the follower tank 2.
Specifically, the vibrating table 8 includes one main vibrating table 8-2 and at least two additional vibrating tables 8-3; the main vibration table 8-2 is connected with one driving box 1 through a mounting plate 8-1, and the additional vibration table 8-3 is connected with other driving boxes 1 through the mounting plate 8-1.
As a preference of this embodiment, the vibrating table 8 includes one main vibrating table 8-2 and two additional vibrating tables 8-3, two driving boxes 1 and one following box 2;
in this embodiment, the vibration table 8 can apply vibration excitation to the active box 1 installed on the upper part of the vibration table to simulate the earthquake vibration simulation of different fault areas.
The vibration table 8 is connected with the active box 1 through a mounting plate 8-1, and the vibration table 8 simulates an earthquake by applying vibration with preset frequency, amplitude and time to the active box 1; the non-rigid connection mode of the follower box 2 and the driving box 1 can realize the follow-up vibration of the follower box 2.
The main vibration table 8-2 is bolted with the mounting plate 8-1 through reserved bolt holes, and the sliding rail 1-4 at the bottom of the driving box 1 is connected with a linear slot formed in the upper part of the mounting plate 8-1. For the additional vibrating table 8-3, the driving box 1 on the upper part of the additional vibrating table 8-3 does not need to slide, so that the mounting plate 8-1 is connected with the additional vibrating table 8-3 and the driving box 1 through bolts, and in order to make up the height gap between the mounting plate 8-1 and the additional vibrating table and the driving box 1, the cushion block 8-4 is arranged, so that the mounting weight is light and the cost is saved.
The remaining one additional vibrating table 8-3 is fixed to the table top.
The follow-up supporting device 9 is used for supporting the follow-up box 2 and comprises an upper frame body 9-1, a heavy spring 9-2 and a ground frame 9-3, wherein the upper frame body 9-1 is connected with the follow-up box 2 through a heavy universal ball 9-4 in a very small friction manner, so that the follow-up box 2 can follow up in a 3-to-6-degree of freedom; a heavy spring 9-2 and a ground frame 9-3 are arranged below the upper frame body 9-1 in sequence.
In this embodiment, a combination mode of two driving boxes 1, one driven box 2, one main vibration table 8-2 and two additional vibration tables 8-3 is adopted, and the specific working procedure of the combination mode is as follows:
the bottom plates of the driving box 1 and the follow-up box 2 are respectively arranged on the table surface of the vibrating table 8 and the follow-up bearing device 9, and after the side box plate 1-2 and the front box plate 1-1 and the rear box plate 1-1 are arranged, the integral frames of the driving box 1 and the follow-up box 2 are basically completed, and the driving box 1 and the follow-up box 2 are connected through a shear joint rubber 10.
After filling a soil sample in the box body, a reaction frame 6 and a vertical loading oil cylinder are arranged at the top of the box body; the hydraulic oil cylinders and the vertical soil pressure loading oil cylinders apply pressure to the loading plate 7, so that the application of the soil body high ground stress in the driving box 1 and the follow-up box 2 is realized, and after the soil body stress level tends to be stable, the hydraulic oil cylinders in front of and behind the driving box 1 on the main vibrating table 8-2 apply horizontal displacement load to the driving box 1, so that the horizontal dislocation of the sliding fault is simulated. Simultaneously, the main vibration table 8-2 and the additional vibration table 8-3 apply vibration with preset frequency, amplitude and time to the driving box 1 at the upper part of the main vibration table so as to simulate the earthquake excitation to which different fault sections are subjected, and the follow-up box 2 is in a very complex stress state due to the fact that the shear joint rubber 10 at the side part and the follow-up support bracket at the lower part of the follow-up box are subjected to the transmission influence of the sliding movement and the transmission influence of the earthquake excitation, so that free movement and follow-up vibration are subjected to the overall influence of high-ground stress, the sliding movement of the fault and the non-uniform earthquake excitation in the whole fault area. And after the horizontal dislocation of the fault reaches a preset amount, the hydraulic cylinder stops pushing, the vibration table 8 stops exciting, and a simulation test is completed at the moment.
Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.

Claims (10)

1. A high ground stress tunnel inconsistent earthquake excitation and fault dislocation test device is characterized in that: the system comprises a fault sliding dislocation system, a high-ground stress field loading control system and a non-uniform earthquake excitation system; the fault walk-slip dislocation system is connected with the non-uniform seismic excitation system, and the non-uniform seismic excitation system applies non-uniform seismic excitation to the fault walk-slip dislocation system; the high-ground stress field loading control system is arranged in the fault sliding and sliding system, and the fault sliding and sliding system is used for simulating sliding and sliding of faults and applying high-ground stress to soil samples in the high-ground stress field loading control system.
2. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus according to claim 1, wherein: the fault sliding and dislocation system comprises at least two driving boxes, at least one follow-up box, a plurality of thrusting devices and a plurality of counterforce devices which are arranged on the non-uniform earthquake excitation system; the follow-up box is arranged between the two driving boxes, and the follow-up box is flexibly connected with the driving boxes through a shear joint rubber; the pushing devices are symmetrically arranged on two sides of one driving box, and the pushing devices apply horizontal driving force to the driving box; the pushing device is arranged on the counter-force device.
3. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus according to claim 2, wherein: the driving box comprises front and rear box plates, side box plates and a side bottom plate; the front box plate, the rear box plate and the side box plates are connected through bolts; the front box plate, the rear box plate and the side box plates are respectively provided with a plurality of soil pressure loading oil tank hole sites matched with the pushing device; the side bottom plates are respectively connected with the rear box plate and the side box plates above, and the side bottom plates are movably arranged on the non-uniform earthquake excitation system.
4. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus as recited in claim 3, wherein: the pushing device is a hydraulic cylinder; the reaction force device comprises a reaction force supporting frame; the hydraulic oil cylinder is fixed on the counter-force supporting frame, and a piston rod of the hydraulic oil cylinder penetrates through a hole site of the soil pressure loading oil tank and is loaded on the high-ground stress field loading control system.
5. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus according to claim 2, wherein: the high ground stress field loading control system comprises a plurality of reaction frames and a plurality of loading plates; the reaction frames are arranged above the front box plate and the rear box plate, and a vertical soil pressure loading oil cylinder is arranged on the reaction frames; the loading plates are all arranged in the driving box body, and form a loading space of the soil sample; the loading plate bears the driving force of the hydraulic oil cylinder in the horizontal direction and the vertical soil pressure loading oil cylinder in the vertical direction so as to apply high ground stress to soil samples in the driving box and the follow-up box.
6. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus according to claim 2, wherein: the non-uniform earthquake excitation system comprises a vibrating table and a follow-up bearing device; the driving box is arranged on the vibrating table, and the vibrating table applies vibration with preset frequency, amplitude and time to the driving box; the follow-up bearing device supports the follow-up box.
7. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus as recited in claim 6, wherein: the vibrating table comprises a main vibrating table and at least two additional vibrating tables; the main vibration table is connected with one driving box through a mounting plate, and the additional vibration table is connected with other driving boxes through the mounting plate.
8. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus as recited in claim 7, wherein: the mounting plate is bolted with the main vibration table through reserved bolt holes; the driving box bottom is provided with a sliding rail which is embedded into a T-shaped groove arranged on the mounting plate.
9. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus according to claim 8, wherein: the sliding rail is a heavy linear guide rail which is used for horizontally sliding the driving box on the main vibration table.
10. The high ground stress tunnel non-uniform seismic excitation and fault dislocation testing apparatus as recited in claim 6, wherein: the follow-up bearing device comprises an upper frame body, a heavy spring and a ground frame; the upper part of the upper frame body is movably connected with the servo box through a plurality of heavy universal balls; and a heavy spring and a ground frame are sequentially arranged below the upper frame body.
CN202311255338.7A 2023-09-26 2023-09-26 High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device Pending CN117309294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311255338.7A CN117309294A (en) 2023-09-26 2023-09-26 High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311255338.7A CN117309294A (en) 2023-09-26 2023-09-26 High ground stress tunnel non-uniform earthquake excitation and fault dislocation test device

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Publication Number Publication Date
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