水文地质工程地质2009，Vol.36Issue(6)：49-53,67,6.
不同含水率软弱结构面剪切蠕变试验及模型研究
Experimental and theoretical studies on the effects of water content on shear creep behavior of weak structural plane of sandstone
摘要
Abstract
Creep behavior of weak structural plane is one of the most important mechanical characteristics of rock mass and always has an important influence on deformation and long-term strength of rock mass. Water content of the fillings is a significant factor influencing the creep properties of the weak structural plane. In this study, by multi-stage loading, a series of shear creep tests on the weak structural plane of sandstone with different water contents are conducted. The curves of the shear creep deformation vs. time under different water content of the fillings are derived. The effects of water content on the shear creep behavior and long-term shear strength of weak structural plane of sandstone are analyzed. Compared with the shear strength by rapid shear test, the long-term strength has sharply decreased. Based on the test results and analysis, modified viscoelastoplastic model is identified to describe the behavior of water content influencing on the weak structural plane of sandstones and parameters of this model are also given through back analysis.关键词
软弱结构面/剪切蠕变试验/含水率/长期抗剪强度/改进的粘弹塑性模型Key words
weak structural plane/ shear creep test/ water content/ long-term shear strength/ modified/ viscoelastoplastic model分类
建筑与水利引用本文复制引用
李鹏,刘建..不同含水率软弱结构面剪切蠕变试验及模型研究[J].水文地质工程地质,2009,36(6):49-53,67,6.基金项目
国家自然科学基金(40672192,40772193) （40672192,40772193）
国家重点基础研究发展计划(2009CB724603) （2009CB724603）
国家自然科学基金重点项目(50539090) （50539090）
