CN-121978305-A - Hydraulic coupling model test device for karst tunnel excavation and use method

CN121978305ACN 121978305 ACN121978305 ACN 121978305ACN-121978305-A

Abstract

The application provides a hydraulic coupling model test device for karst tunnel excavation and a use method thereof, and relates to the technical field of tunnel models, wherein the device comprises a box body, and a first side wall and a second side wall of the box body are provided with at least one group of door openings which are opposite to each other; the water supply assembly comprises a first water tank which moves along the height direction of the box body, the first water tank is selectively communicated with the bottom of the box body, and the pressure assembly comprises a pressure plate positioned at the top of the box body, wherein the pressure plate is selectively moved towards or away from the inside of the box body. According to the method, the geological environment of the soluble rock-non-soluble rock contact zone can be truly simulated, meanwhile, the process of excavating the soluble rock-non-soluble rock contact zone in a real scene can be simulated by selecting the door opening for excavating, and therefore risk points in tunnel excavation engineering are predicted.

Inventors

YANG WENBO
YI HUAXIANG
NIE JINCHENG
ZHAO AIJUN
FENG JIANPING
HE CHUAN
WU BINGYIN
CHEN FENG
ZHAO CHANGHUI
WANG WEIFENG

Assignees

西南交通大学
中铁城市发展投资集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260114

Claims (10)

1. A hydraulic coupling model test device for karst tunnel excavation, its characterized in that includes: the box body (10), the top of the box body (10) is opened, the box body (10) comprises a first side wall and a second side wall which are opposite to each other, and the first side wall and the second side wall are provided with at least one group of door openings opposite to each other; The baffle assembly (20), the said baffle assembly (20) is connected with box (10) removably, the said baffle assembly (20) is suitable for separating the interior of the box (10) into at least two holding tanks, at least two holding tanks are suitable for filling the analog material separately; -a water supply assembly (30), the water supply assembly (30) comprising a first water tank (31) adapted to move in the height direction of the tank (10), the first water tank (31) being in selective communication with the bottom of the tank (10); A pressure assembly comprising a pressure plate (41) at the top of the tank (10), the pressure plate (41) being selectively movable towards or away from the interior of the tank (10).
2. The hydraulic coupling model test device for karst tunnel excavation according to claim 1, wherein the water supply assembly (30) further comprises a supporting bracket (32) and a connecting rope (33), a pulley (34) is arranged at the top of the supporting bracket (32), one end of the connecting rope (33) is connected with a winding device, and the other end of the connecting rope (33) bypasses the pulley (34) and is connected with the first water tank (31).
3. The hydraulic coupling model test device for karst tunnel excavation according to claim 2, wherein the water supply assembly (30) further comprises a second water tank (35), the second water tank (35) is located at the bottom of the first water tank (31) and is matched with the supporting bracket (32) and/or the ground, a water pump is arranged in the second water tank (35), a water inlet of the water pump is communicated with the interior of the second water tank (35), and a water outlet of the water pump is communicated with the interior of the first water tank (31).
4. A hydraulic coupling model test device for karst tunnel excavation according to claim 3, characterized in that the side wall of the first water tank (31) is connected with an overflow pipe (36), one end of the overflow pipe (36) is connected with the inside of the first water tank (31), and the other end of the overflow pipe (36) is connected with the inside of the second water tank (35).
5. The hydraulic coupling model test device for karst tunnel excavation according to claim 1, wherein the partition plate assembly (20) comprises two partition plate bodies (21), the two partition plate bodies (21) are detachably connected with the box body (10), respectively, the two partition plate bodies (21) are adapted to divide the interior of the box body (10) into a first space, a second space and a third space, and the first space, the second space and the third space are adapted to be filled with a simulation material, respectively.
6. The hydraulic coupling model test device for karst tunnel excavation according to claim 5, wherein both ends of the partition plate body (21) are respectively abutted against the inner wall of the box body (10) through sealing strips (22).
7. The hydraulic coupling model test device for karst tunnel excavation according to claim 1, characterized in that the pressure assembly further comprises a base (42) and a support frame (43), the base (42) being adapted to cooperate with the ground, the support frame (43) being connected with the base (42), the pressure plate (41) being connected with the support frame (43) by means of a hydraulic cylinder (44).
8. The hydraulic coupling model test device for karst tunnel excavation according to claim 7, wherein the bottom of the supporting frame (43) is rotatably connected with the base (42), the supporting frame (43) rotates and has a loading state in which the projection of the pressing plate (41) in the height direction of the box body (10) is located in the box body (10), and an avoidance state in which the projection of the pressing plate (41) in the height direction of the box body (10) is spaced from the box body (10).
9. The hydraulic coupling model test device for karst tunnel excavation according to claim 1, further comprising a flange plate (11), wherein the flange plate (11) is configured to be a plurality of corresponding door openings one by one, the plurality of flange plates (11) are respectively connected with the box body (10) through fasteners, and the flange plate (11) is connected with the box body (10) to be suitable for closing the corresponding door openings.
10. A method of using a hydraulic coupling model test apparatus for karst tunnel excavation, the method being applied to the hydraulic coupling model test apparatus for karst tunnel excavation of any one of claims 1 to 9, comprising: Filling different simulation materials into at least two accommodating grooves in the box body (10) respectively; -vertically lifting out the partition plate assembly (20); a pressing plate (41) of the control pressure assembly moves towards the inside of the box body (10) and applies vertical load to the simulation material in the box body (10); the first water tank (31) is communicated with the bottom of the tank body (10), and the first water tank (31) is lifted to a preset height; excavating a simulation material in the box body (10) by a corresponding door opening in a manual drilling mode to excavate a tunnel model, wherein the tunnel model is excavated section by section according to a preset footage, and the data of a sensor in the box body (10) are paused and collected every time one footage is excavated; And simulating shotcrete to perform primary support after the data of the sensor are stable until the gushing water disaster is induced.

Description

Hydraulic coupling model test device for karst tunnel excavation and use method Technical Field The invention relates to the technical field of tunnel models, in particular to a hydraulic coupling model test device for karst tunnel excavation and a use method thereof. Background In tunnel construction engineering, the section crossing the soluble rock-non-soluble rock contact zone faces extremely high gushing water risk, and the stratum has the problems of large rock strength difference, uneven rock integrity and the like, and the instability risk after tunnel excavation is further aggravated due to the hydraulic coupling effect under the high-pressure water-rich condition. The existing tunnel geomechanical model test device focuses on the simulation of a single rock stratum or a common water-bearing stratum, and has obvious defects in the aspect of simulating a special geological structure with obvious permeability difference and interface effect, namely a soluble rock-non-soluble rock contact zone. Disclosure of Invention The invention aims to provide a hydraulic coupling model test device for karst tunnel excavation and a use method thereof, so as to solve the problems. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The application provides a hydraulic coupling model test device for karst tunnel excavation, which comprises a box body, a baffle plate assembly, a water supply assembly and a pressure assembly, wherein the box body is opened at the top and comprises a first side wall and a second side wall which are opposite to each other, at least one group of door openings are formed in the first side wall and the second side wall which are opposite to each other, the baffle plate assembly is detachably connected with the box body and is suitable for dividing the interior of the box body into at least two accommodating grooves, the at least two accommodating grooves are respectively suitable for being filled with a simulation material, the water supply assembly comprises a first water tank which is suitable for moving along the height direction of the box body and is selectively communicated with the bottom of the box body, and the pressure assembly comprises a pressing plate positioned at the top of the box body and is selectively moved towards or away from the interior of the box body. The hydraulic coupling model test device for karst tunnel excavation comprises the steps of filling different simulation materials into at least two accommodating grooves in a box body respectively, vertically hanging out a baffle plate assembly, controlling a pressing plate of a pressure assembly to move towards the box body and apply vertical load to the simulation materials in the box body, communicating a first water tank with the bottom of the box body, lifting the first water tank to a preset height, excavating the simulation materials in the box body by a corresponding door opening in a manual drilling mode to excavate a tunnel model, excavating the tunnel model according to a preset scale entering section, suspending and collecting data of a sensor in the box body every time when the tunnel model is excavated, and simulating initial support of sprayed concrete after the data of the sensor is stable until a sudden water surge disaster is induced. The beneficial effects of the invention are as follows: According to the hydraulic coupling model test device for karst tunnel excavation, the detachable baffle plate component can accurately and conveniently construct a complex geological structure of a soluble rock-non-soluble rock contact zone, physical simulation of multi-lithologic stratum conditions is achieved, a stress field and a seepage field of simulation materials in a box body are independently and accurately controlled through the water supply component and the pressure component, flexible and stable simulation of high ground stress, high-pressure water enrichment and different working conditions is achieved, meanwhile, excavation is carried out through selecting different door openings, and single-hole tunnels, double-hole tunnels with the same height and double-hole tunnels with different heights can be simulated. Therefore, the application can simulate the geological environment of the soluble rock-non-soluble rock contact zone more truly through the arrangement, and simultaneously simulate the process of excavating the tunnel through selecting different door openings under the real scene, so that the excavation project of the tunnel is simulated before the real tunnel is started, and the risk point in the tunnel excavation project is predicted. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the str