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冰川冻土 ›› 2016, Vol. 38 ›› Issue (4): 889-897.doi: 10.7522/j.issn.1000-0240.2016.0100

• 岩土本构模型与参数研究 • 上一篇    下一篇

地应力与岩体模量关系的理论及试验研究

裴启涛1, 丁秀丽1, 黄书岭1, 罗超文2   

  1. 1. 长江科学院 水利部岩土力学与工程重点实验室, 湖北 武汉430010;
    2. 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, 湖北 武汉 430071
  • 收稿日期:2016-02-05 修回日期:2016-07-28 出版日期:2016-08-25 发布日期:2016-09-19
  • 作者简介:裴启涛(1986-),男,江苏宿迁人,工程师,2014年在中国科学院武汉岩土力学研究所获博士学位,现从事岩土工程与地质灾害方面的研究.E-mail:pqt01@163.com
  • 基金资助:
    国家重点研发计划项目(2016YFC0401802;2016YFC0401804);国家自然科学基金项目(51609018);中央级公益性科研院所基本科研业务费项目(CKSF2015041/YT)资助

Theoretical and experimental study of relation between in-situ stress and rock mass modulus

PEI Qitao1, DING Xiuli1, HUANG Shuling1, LUO Chaowen2   

  1. 1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2016-02-05 Revised:2016-07-28 Online:2016-08-25 Published:2016-09-19

摘要: 岩体模量(弹性模量及变形模量)是工程岩体力学特性的基础参数之一,研究地应力状态与岩体模量之间的关系具有重要意义.基于静弹性热力学模型原理,结合弹性理论,推导了水平主应力与岩体性质参数的定量关系,并对地应力与岩体模量的关系进行了探讨.在此基础上,以赣龙铁路梅花山隧道为依托,开展了围岩应力及岩体模量参数的现场测试工作,并将实测成果与理论分析进行对比.结果表明:当埋深影响较小时,花岗岩中的水平主应力与岩体模量呈线性正相关关系;当埋深相差较大时,深度对地应力及岩体模量的影响均不可忽略,水平主应力与岩体模量一般呈非线性关系,需要进一步研究;对花岗岩中的岩体弹性模量和变形模量与水平主应力之间的相关性进行对比发现,岩体变形模量与水平主应力的相关性更好.研究成果可为工程岩体力学参数取值及评价提供借鉴.

关键词: 地应力, 弹性岩层, 岩体模量, 原位试验, 相关性分析

Abstract: Rock mass modulus (elastic modulus and deformation modulus) is one of the basic parameters in rock engineering. It is of great significance to find out the relationship between in-situ stress and rock mass modulus. Combing with the elasto-static thermal stress model as well as the theory of elasticity, the relation of horizontal principal stresses and rock mass property parameters is quantitatively established. Then, the effect of rock mass modulus on the distribution of in-situ stress is discussed. On the basis, an in-situ stress measurement and rock mass modulus test are carried out in Meihuashan tunnel, and the comparison between the measured results and the theoretical results are made. The results are as follows: When the influence of buried depth is less, the relation between horizontal principal stresses and rock mass modulus shows a positive linear correlation in granite. However, when the buried depth varies large and its effect on in-situ stress and rock mass modulus can't be neglected, the relation between horizontal principal stresses and rock mass modulus turns out to be a positive nonlinear correlation. In granite, the relative coefficient between horizontal principal stresses and rock mass deformation modulus exceeds the relative coefficient between horizontal principal stresses and rock mass elastic modulus. Therefore, the results above can provide great reference to determine rock mass mechanical parameters in rock engineering.

Key words: in-situ stress, elastic rock mass, rock mass modulus, field test, correlation analysis

中图分类号: 

  • TU45