Test system for simulating deformation and failure characteristics of tunnel

A technology for testing systems and destructive characteristics, applied in the testing of machines/structural components, measuring devices, instruments, etc., can solve problems such as deviation of experimental results, temporary solutions, and unreasonable treatment plans, so as to achieve uniform distribution and accurate simulation Effect

Active Publication Date: 2018-11-16
TONGJI UNIV +1
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, with the rapid development of underground engineering technology and construction scale, more and more tunnel projects are built in weak and broken surrounding rocks or unfavorable geological sections. Deformation or even cracking will seriously affect the bearing safety and performance of the structure
At present, the research on the mechanical properties and reinforcement methods of structures with diseases is not deep enough, and the existing technologies are still immature, and the situations of "unreasonable treatment plan" and "fixing the symptoms but not the root cause" occur from time to time. The tunnel lining structure is truly simulated through indoor model tests Mechanical behavior, guidance, reinforcement and maintenance are becoming more and more urgent
At present, most of the experimental devices are mainly divided into two categories. One is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Test system for simulating deformation and failure characteristics of tunnel
  • Test system for simulating deformation and failure characteristics of tunnel
  • Test system for simulating deformation and failure characteristics of tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a test system for simulating the deformation and failure characteristics of tunnels. In this test system, the tunnel second lining model 1 is placed on the auxiliary support subsystem, and external loads are arranged along the entire outer surface of the tunnel second lining model 1. The resistance subsystem 3, the two sides of the external load resistance subsystem 3 are respectively connected with the second lining model 1 of the tunnel and the reaction subsystem 5, and connected with the servo controller 4 on the industrial computer together with the measurement subsystem to realize the external load of the structure. Collect and analyze unloading and measurement data, and study structural deformation and crack damage under load, as well as maintenance effects under different timing and reinforcement methods.

[0042] Among them, the second lining model 1 of the tunnel corresponds to the tunnel prototype with two to four lanes in a single hole...

Embodiment 2

[0065] The structure of the test system in this example is exactly the same as that in Example 1, but this example is a test system for studying the deformation and failure characteristics of the second lining structure of the tunnel under the action of bias load. Therefore, in this example, the active load is applied The area is different from Example 1, specifically as Figure 5 shown.

Embodiment 3

[0067] The test system in this embodiment adds a reinforcement sub-module 2. The reinforcement sub-module 2 includes three types of arches, bonded steel, and fiber. It is made by cast-in-place or pasted. During the manufacturing process, the external load of the second lining model 1 of the tunnel is maintained. Basically unchanged, the cast-in-place method simulates the reinforcement of superimposed arches or separated arches, and the pasting method simulates pasting steel plates or pasting fibers, and a connection and separation mechanism is added between the reinforcement sub-module 2 and the second tunnel lining model 1 , the connection and separation mechanism includes short anchor rods, waterproof boards, layering strips, and pins. If a superimposed arch is used for reinforcement, the inner surface of the second lining model 1 of the tunnel should be chiseled, and short anchors with a diameter of 3 to 4 mm should be used at a certain interval along the circumferential dire...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a test system for simulating the deformation and failure characteristics of a tunnel. The test system comprises a tunnel secondary lining model used as a test object for simulating the structure of the tunnel; an external load resistance subsystem disposed on the periphery of the outer surface of the tunnel secondary lining model and used for applying a variable external load to the tunnel secondary lining model in order to simulate an interaction between a surrounding rock and the tunnel; a measurement subsystem disposed on the tunnel secondary lining model and used for acquiring relevant data before and after the external load resistance subsystem acts on the tunnel secondary lining model; and a servo controller connected with the external load resistance subsystem and the measurement subsystem, and used for receiving the relevant data acquired by the measurement subsystem and controlling the degree of the external load applied by the external load resistancesubsystem to the tunnel secondary liner model. Compared with the prior art, the test system has a high actual load environment simulation degree, high test accuracy and a high prototype matching degree.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering physical model tests, in particular to a test system for simulating deformation and failure characteristics of tunnels. Background technique [0002] Different from above-ground buildings such as bridges and industrial and civil buildings, underground structures such as tunnels are buried in complex rock-soil media, resulting in problems such as structural bearing capacity, mechanical properties, and interaction mechanisms with surrounding rock-soil bodies. Due to the large uncertainty, the results of pure theoretical analysis and numerical analysis are quite different from the actual situation of the project, so it is difficult to be used as an exact design basis. The physical model test is popular because it can better simulate the actual stress of the structure and the characteristics of deformation and damage, and effectively verify the rationality of the design and construction pla...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M99/00
CPCG01M99/007
Inventor 刘学增郭乔堃唐精桑运龙杨帆赵芳师刚
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap