摘要
自20世纪70年代以来,强度折减法逐步被用于评价岩土工程稳定性。对于线性的Mohr-Coulomb准则,由于其抗剪参数的折减物理意义明确,得到了学术界的一致认可。Hoek提出的非线性半经验Hoek-Brown强度准则,也已被岩石工程所广泛应用,然而关于其强度参数的折减,国内外存在着较大的分歧。首先,介绍了非线性强度折减技术的基本理论;然后,在船梁子斜坡稳定性分析中,分别采用非线性强度折减法和极限平衡理论进行计算,并对两种方法得到的边坡安全系数及破坏滑移面进行比较,分析表明,非线性强度折减技术和极限平衡理论结果基本吻合;最后,通过与等效Mohr-Coulomb法的结果对比分析,验证了非线性强度折减法在岩质边坡稳定性分析中的合理性和适用性。
Since 1970,the method of strength reduction is gradually used to evaluate the stability of geotechnical engineering.The linear Mohr-coulomb criterion,due to its clear physical meaning of the reduction of the shear strength,has been got the academic recognition.The semi-empirical nonlinear Hoek-Brown criterion,which proposed by Hoek,has also been widely used in rock engineering,however,there are large differences between domestic and foreign in the reduction of its strength parameters.First,the basic theory of the nonlinear strength reduction technique is introduced;then,the nonlinear strength reduction technology and limit equilibrium method are adopted respectively to calculate the Chuangliangzi slope,and the comparison of the slip surface and safety factor is taken,the results show that,the results of the nonlinear strength reduction technology and the limit equilibrium method are consistent;Finally,through comparing and analyzing the results of the equivalent mohr-coulomb method,the reasonable and suitable of the nonlinear strength reduction in rock slope stability is proved.
出处
《煤炭技术》
CAS
北大核心
2011年第8期142-145,共4页
Coal Technology
基金
重庆三峡学院科学研究重点资助项目
