Study of elastoplastic constitutive model of strongly weathered granite 
PartⅠ: Theoretical model and parameter inversion

CHEN Wei-zhong; CAO Jun-jie; YU Hong-dan; JIA Shan-po; CHEN Pei-shuai; LI Zhi-guo

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Study of elastoplastic constitutive model of strongly weathered granite PartⅠ: Theoretical model and parameter inversion

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- Study of elastoplastic constitutive model of strongly weathered granite PartⅠ: Theoretical model and parameter inversion
- Vol. 32, Issue 11, (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中心,济南,250061
  3. 长江大学城市建设学院,湖北,荆州,434023
  4. 中国水电顾问集团成都勘测设计研究院,成都,610072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：09 November 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
CHEN Wei-zhong, CAO Jun-jie, YU Hong-dan, et al. Study of elastoplastic constitutive model of strongly weathered granite PartⅠ: Theoretical model and parameter inversion[J]. 2011, 32(11).
DOI：

CHEN Wei-zhong, CAO Jun-jie, YU Hong-dan, et al. Study of elastoplastic constitutive model of strongly weathered granite PartⅠ: Theoretical model and parameter inversion[J]. 2011, 32(11). DOI：

摘要

厦门翔安隧道是国内修建的第一条海底隧道，其相关勘察、设计以及施工经验和工程总结材料将对国内其他海底隧道的建设具有十分重要的借鉴作用。与山岭隧道相比，需要解决的岩体力学与隧道工程结构设计等方面的问题不尽相同，存在不少现行规范未能涵盖而又亟待在设计中予以明确回答的问题。根据厦门翔安海底隧道风化槽强风化花岗岩的室内应力-渗流耦合试验成果，建立了强风化花岗岩的应变硬化的弹塑性模型和黏聚力演化方程，通过反演确定了模型的力学参数。研究表明，提出的应变硬化的弹塑性模型能合理地反映强风化花岗岩的力学特性，其成果具有很好的推广应用价值

Abstract

Xiamen subsea tunnel is the first undersea road tunnel in China. The investigation

design

engineering experience will be used for reference to other subsea tunnels’ construction. The encountered problems about rock mechanics and tunneling designs for subsea tunnel construction are more complicated than other road tunnels. There are many problems which the present criteria have not be covered yet; and all the questions are urgently needed to be solved. In order to study the mechanical characteristics of the host rock in weathered strata

a strain hardening elastoplastic model and cohesion evolution equation are established to describe the hydro-mechanical coupled behavior of the strongly weathered granite based on laboratory test results; and corresponding parameters have been identified by back analysis. The developed strain-hardening elastoplastic model can well describe the mechanical characteristics of strongly weathered granite. The method suggested in the paper is worthy to be widely used.

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