Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method

YANG Jian-ping; CHEN Wei-zhong; DAI Yong-hao

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Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method

更新时间：2026-06-25

- Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method
- Vol. 32, Issue 6, (2011)
- 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. 山东大学岩土与结构工程研究中心,济南,250061
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：21 June 2011，
  
  Published：2011
- 稿件说明：
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YANG Jian-ping, CHEN Wei-zhong, DAI Yong-hao. Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method[J]. 2011, 32(6).
DOI：

YANG Jian-ping, CHEN Wei-zhong, DAI Yong-hao. Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method[J]. 2011, 32(6). DOI：

摘要

通过分开考虑岩块和裂隙对岩体变形的贡献，研究了任意裂隙分布岩体等效变形模量的解析计算方法，并用正交裂隙岩体对该方法进行了验证，得到的结果和经典解析解完全一致。此外，通过该方法对锦屏Ⅱ级电站辅助洞中段随机裂隙岩体进行不同尺寸、不同方位下等效变形模量的计算，计算结果显示，随着岩体尺寸的增大，不同方位的变形模量值趋于稳定，该裂隙岩体变形模量的特征单元对(REV)尺寸为8 m，和有限元计算结果一致。结果表明该方法可以用来研究裂隙岩体等效变形模量尺寸效应和各向异性特性，研究成果对于裂隙岩体等效变形参数取值具有重要意义。

Abstract

An analytical method for estimating cracked rock mass equivalent deformation modulus is presented

by considering deformation of rock block and cracks separately. Verification of the method for determining the equivalent rock mass deformation modulus is conducted against closed-form solutions for regular cracked rock mass

leading to very good agreements. Furthermore

equivalent deformation modulus of the randomly cracked rock mass in Jinping hydropower station are studied. Results gained by the analytical method show that representative eleementory volume(REV) of the studied rock masses is 8 m

which is the same as the results achieved by finite element method. Study results show that the developed analytical method can be used in estimating the REV properties of fractured rock mass

which is of great important in parameters determination for fractured rock mass.

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YANG Jian-ping

CHEN Wei-zhong

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ZHENG Yin-he

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Related Institution

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

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Jilin Achitectual and Civil Engineering Institute

Hebei Provincial Communications Planning and Design Institute

School of Civil Engineering, Hebei University of Technology

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