Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions

CHEN Hao; REN Wei-zhong; SHU Zhong-gen; LI Dan

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Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions

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- Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions
- Vol. 33, Issue S1, (2012)
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉,430071
  2. 中国公路工程咨询集团有限公司,北京,100097
  3. 武汉科技大学城市学院,武汉,430065
- 作者简介：
- 基金信息：
- DOI：
  CLC： U451
- Online First：21 September 2012，
  
  Published：2012
- 稿件说明：
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CHEN Hao, REN Wei-zhong, SHU Zhong-gen, et al. Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions[J]. 2012, 33(S1).
DOI：

CHEN Hao, REN Wei-zhong, SHU Zhong-gen, et al. Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions[J]. 2012, 33(S1). DOI：

摘要

以重庆至长沙公路共和隧道为研究对象，研制出相似模型材料和配套试验设备，进行不同长度锚杆支护条件下的隧道超载试验。采用应变测量技术，测量两种不同长度锚杆支护工况下的隧道关键部位的应变值，据此分析围岩体在锚杆支护后的应力变化规律。通过模型材料室内试验，获取岩体相关计算参数，采用与模型试验相同的边界条件进行相应工况的有限元数值模拟，研究围岩体的变形量、应力场和锚杆轴力因锚杆长度不同而产生的变化。结果表明，模型试验和数值模拟反映围岩体应力和锚杆轴力因锚杆长度的不同而产生的变化是一致的。

Abstract

According to rock character of a certain soft rock tunnel of Chongqing to Changsha highway

similar model materials and supporting test equipments are developed to reproduce the whole process of progressive failure of surrounding rock under different supporting conditions. Through solving a series of technological matters in execution and installation and testing

by using the strain measuring technology

the strain of key parts of the surrounding rock under different supporting conditions are measured; according to this

the variability of the stress of surrounding rock are studied. By model materials laboratory determining the related parameters of rock mass

the numerical simulation are worked with the same boundary condition as the model test

according to this

the stress field and the deformation of the surrounding rock are studied; the variation of the axial force of the anchor bolt is studied. We compare the variation of stress of the surrounding rock and the variation of the axial force of the anchor bolt under different supporting conditions of the model test with the numerical simulation and draw the conclusion that the two processes coincide with each other.

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Related Author

CHEN Hao

REN Wei-zhong

LI Dan

XIA Bin-wei

CHEN Hao

REN Wei-zhong

LI Dan

XIA Bin-wei

Related Institution

Lab. for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering of Education Ministry, Chongqing University, Chongqing

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics， Chinese Academy of Sciences

China Education Ministry’s Key Lab. for Exploitation of Southwest Resources and Environmental Disaster Control Engineering, Chongqing University

School of Civil Engineering and Mechanics, Lanzhou University

Gansu Investigation and Design Institute of Water Resources and Hydropower

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