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Device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces

A technology of structural mechanics and support force, which is applied in the research of engineering tunnels and engineering roadways, can solve problems such as the inability to analyze the impact of tunnel support and the inability to determine the thickness of fluid fillings in the development law, achieving high engineering application value and cost low cost and easy operation

Active Publication Date: 2019-09-13
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device and method for simulating the development of the surrounding rock plastic zone and the mechanical response of the fluid lining structure under different support forces, aiming at the fact that the existing simulation device cannot analyze the influence of the tunnel support on the tunnel surrounding rock and the support structure itself ; and it is impossible to determine the development law of the plastic zone of the surrounding rock under the specified support stress, and the optimal fluid filling thickness in the process of inhibiting the large deformation of the soft rock in the tunnel; the device is independently developed, and the support force adjustment device of the device can simulate Under different support stresses of the tunnel, observe the compactness of the internal expansion mud and the numerical changes of the pressure sensor to determine the deformation law and stress distribution of the plastic zone of the surrounding rock under different support stresses; analyze the flow of different surrounding rock stresses The effect of quality filling lining structure on stress homogenization and load reduction, and the internal stress distribution

Method used

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  • Device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces
  • Device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces
  • Device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces

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Experimental program
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Effect test

Embodiment 1

[0040] see Figure 1-5 , a device for simulating the development of surrounding rock plastic zones and the mechanical response of fluid lining structures under different support forces, it includes a support force regulator 1, and the support force regulator 1 includes two high-strength plates 4, and the high-strength The diagonal position of the plate 4 is connected by two vertically arranged limit anchor rods 2, the high-strength plate 4 on the top is fixed on the top of the limit anchor rod 2 through the screw disk 3, and the high-strength plate 4 on the bottom A force-bearing device 5 is supported, and two symmetrically arranged high-strength segments 17 are arranged inside the force-receiving device 5, and a spring damper 16 is installed between the high-strength segment 17 and the inner wall of the force-bearing device 5 .

[0041] Further, the high-strength plate 4 is a high-strength tempered glass or acrylic plate, and a through hole for passing through the limit anch...

Embodiment 2

[0052] Any one of the experimental methods for simulating the development of surrounding rock plastic zones and the mechanical response of fluid lining structures under different support forces includes the following steps:

[0053] Step1: Material preparation: Prepare high-strength PVC pipe, carbon fiber cloth, rubber sheet, expansion agent, sand, cement, mica sheet, fiber anchor rod, pressure sensor, wood board, screw disk, stress plate, support force regulator and force device;

[0054] Step2: Make the stress device 5: Use high-strength PVC pipe 9 to make a stress device with a height of H and a cross-sectional diameter of D with one end closed and one end open; carbon fiber cloth is used to wrap the outer surface and bottom of the stress device, and the wrapped The thickness is adjusted according to the experimental requirements;

[0055] Step3: Make the support force regulator 1: use the screw plate 3 to fix the two fiber anchor rods 2 passing through the diagonal prefab...

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Abstract

The invention provides a device and method for simulating surrounding rock plastic zone development and fluid lining structural mechanics response under different supporting forces. The device comprises a supporting force regulator, the supporting force regulator comprises two high-strength plates, opposite angle positions of the high-strength plates are connected through two vertically arranged limiting anchor rods; the high-strength plate at the top is fixedly arranged at the top of the limiting anchor rods through screw discs; a force-bearing device is supported on the high-strength plate at a bottom layer; two symmetrically arranged high-strength duct pieces are arranged in the force-bearing device; and spring dampers are arranged between the high-strength duct pieces and the force-bearing device. Stress pieces at the internal are used for performing real-time recording and observation on the stresses of at different regions at the internal, and the plastic deformation and stress distribution condition of the surrounding rock under different supporting stresses are simulated by scanning the compactness distribution condition of the internal fluid filler and swelling agent through CT scanning, so that the simulation experiment is more real and accurate.

Description

technical field [0001] The device relates to a device and method for simulating the development of the plastic zone of the surrounding rock and the mechanical response of the fluid lining structure under different support forces, and is mainly used in the research of engineering tunnels, engineering roadways and other fields. Background technique [0002] In recent years, with the rapid development of my country's national economy, the construction of expressway and national highways as the main body of the rapid transportation network has made rapid progress, and mountain road tunnels play an increasingly prominent role as an important part of expressways. For laboratory research, the existing tunnel simulation device is too large and extremely inconvenient to operate, and the existing tunnel simulation device only studies and analyzes the effect of lining support, and cannot analyze the impact of tunnel support on the tunnel surrounding rock and the impact on tunnel support...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01N23/046
CPCG01L5/0028G01N23/046
Inventor 刘杰高素芳谢晓康莫承林兰俊黎照孙涛罗越文韩绍康
Owner CHINA THREE GORGES UNIV
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