Study of shear properties of rock structural plane by grouting reinforcement

HAN Li-jun; ZONG Yi-jiang; HAN Gui-lei; ZHANG Hou-quan

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Study of shear properties of rock structural plane by grouting reinforcement

更新时间：2026-06-25

- Study of shear properties of rock structural plane by grouting reinforcement
- Vol. 32, Issue 9, (2011)
- 作者机构：
  
  中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏,徐州,221008
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU458+.3
- Online First：13 September 2011，
  
  Published：2011
- 稿件说明：
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HAN Li-jun, ZONG Yi-jiang, HAN Gui-lei, et al. Study of shear properties of rock structural plane by grouting reinforcement[J]. 2011, 32(9).
DOI：

HAN Li-jun, ZONG Yi-jiang, HAN Gui-lei, et al. Study of shear properties of rock structural plane by grouting reinforcement[J]. 2011, 32(9). DOI：

摘要

为了研究破裂岩体结构面的注浆加固效果，并揭示其加固实质和作用机制，对单轴压缩试验形成的破裂岩样结构面粗糙度进行了测量与研究；通过破裂岩样结构面注浆加固的剪切试验，分析了注浆对结构面强度和刚度等力学特性参数的影响；通过锯齿形模型化结构面注浆前后剪切试验，分析了锯齿形结构面的力学特性及注浆加固对模型化结构面的影响。研究结果表明，同种岩样压裂后结构面粗糙度系数JRC相近，其数值约为8～10，具有可复制性；注浆后结构面残余强度、剪切峰值强度及上升段斜率均有明显提高；注浆后岩体中结构面的刚度也得到了明显改善；通过理论分析，给出了结构面刚度的理论拟合公式；结构面的剪切峰值强度及残余强度随着锯齿形齿数的增多明显提高，注浆加固后，结构面剪切峰值强度、黏聚力都有不同程度的增大，而内摩擦角变化不大

Abstract

In order to study the grouting reinforcement effect of structural plane in cracked rock mass of uniaxial compression test

and reveal the essence and mechanisms of grouting reinforcement

the roughness of structural plane in cracked rock mass was measured and studied. The influence of grouting on strength

joint roughness coefficient (JRC) and stiffness of structural plane was analyzed through the shear test of structural plane of rupture rock sample around grouting reinforcement; and the test result was back analyzed by using JRC－JCS mode. The mechanical properties and grouting effect were analyzed through the shear test of sawtooth structural plane modeling around grouting reinforcement. The results show that the JRC of structural plane in artificial cracked rock of the same rock mass is similar and replicable，and the value was about 8-10. Stiffness

peak shear strength

residual strength and slope of upward section of structural plane were significantly improved by grouting reinforcement. The theoretical formula of structural plane stiffness was given by theoretical analysis. The peak shear strength

residual strength and cohesion of structural plane increased markedly with the increase of sawteeth number on structural plane and after grouting reinforcement

but little change in the internal friction angle.

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