Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint

SUN Xu-shu; LI Jian-lin; WANG Le-hua; BAI Jun-lei; JIANG Zhao-rong

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Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint

更新时间：2026-06-25

- Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint
- Vol. 35, Issue S1, (2014)
- 作者机构：
  
  1. 三峡大学水利与环境学院,湖北,宜昌,443002
  2. 三峡大学土木与建筑学院,湖北,宜昌,443002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：20 June 2014，
  
  Published：2014
- 稿件说明：
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SUN Xu-shu, LI Jian-lin, WANG Le-hua, et al. Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint[J]. 2014, 35(S1).
DOI：

SUN Xu-shu, LI Jian-lin, WANG Le-hua, et al. Experimental research on anisotropic mechanical characteristic of samples with single prefabricated joint[J]. 2014, 35(S1). DOI：

摘要

节理岩体具有特殊的不连续结构，从而展现出复杂的各向异性力学特性。为了掌握这一复杂力学特性，从理论上分析了单一节理面的力学效应，并通过常规三轴压缩试验研究了单一预制贯通节理试件的各向异性力学特性。结果表明，节理试件的力学特性分为受节理面控制和岩块控制；与完整试件相比，节理试件的力学参数均有不同程度降低，其中弹性模量、抗压强度、黏聚力随节理倾角呈U型分布，最小值均出现在60°倾角节理试件，而内摩擦角与节理倾角呈线性增大关系；随着围压等级升高，不同倾角节理试件弹性模量和抗压强度的最大值与最小值的比值降低，力学性能差异减小。

Abstract

The jointed rock mass is a discontinuous body with special structure

and shows the anisotropic mechanical characteristic. In order to understand its complex mechanical characteristic

the mechanical effects of single joint surface is analyzed theoretically; and the triaxial compression test is conducted on samples with single prefabricated joint. The test results show that the mechanical characteristic of jointed samples is governed by either joint surface or rock. Compared with the intact samples

the mechanical parameters of jointed samples reduce inordinately. The Young’s modulus

compressive strength

cohesion are in U-shaped along with joint inclination and the minimum value occured at the inclination of 60° jointed samples. On the contrary

the internal friction angle increases linearly with the joint inclination. With the increasing of confining pressure

the ratio of maximum to minimum of Young’s modulus and compressive strength decrease; it shows that differences of mechanical characteristic of various inclination jointed samples lessen.

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