摘要
介绍了主要岩石应力破坏判据及其适用性,提出了变形破坏判据研究的必要性。基于随机介质理论,提出了随机介质变形破坏判据。该判据与应力水平无直接关系,完全用变形来表示,可避开复杂的本构关系,而且能够正确地反映岩土体固有变形特性,能够直接用监测的变形资料进行岩土体的稳定性评价。并将该判据应用于澳大利亚某边坡的稳定性分析中,预测结果与实测结果较吻合,并得出随着边坡角的增加,滑坡面的变化规律,与极限平衡法的研究结论相类似,但随机介质变形破坏理论是基于变形控制为出发点,以实测资料为基础,无需去求若干假设的滑动面的安全系数,在工程实践中应用更简单方便。
The main rock stress failure criteria and their applicability are introduced and it is necessary to study the deformation failure criterion.Based on the stochastic medium,the deformation failure criterion of stochastic medium is put forward.It can avoid complex constitutive law and can be expressed only with strain.It can reflect the inherent deformation properties of the rock and soil and can be used to estimate the engineering safety by use of the field observed data.Furthermore,the strain failure criterion is used to analyze the stability of a slope in Australia which shows that the theoretical results and the field observed data are consistent.The positions of slide plane with different slope angles are obtained with the present method,which are similar to the results of the limit equilibrium method.However,the deformation failure criterion of stochastic medium is simpler and more convenient in the engineering application because it is basd on the observed data and deformation control,which is not necessary to assume slide planes to compute its safety coefficient respectively.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第2期165-171,共7页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(50708116)
中国博士后基金项目(20080430690)
中国博士后科学基金特别项目(200801206)
关键词
应力破坏判据
变形破坏判据
随机介质理论
地表移动
stress failure criterion
deformation failure criterion
stochastic medium
ground movement
