| 土体强度各向异性基坑的抗隆起稳定性分析 |
| |
| 引用本文： | 蔡袁强,王佳琦,孙宏磊.土体强度各向异性基坑的抗隆起稳定性分析[J].岩土力学,2012,33(4):1117-1122. |
| |
| 作者姓名： | 蔡袁强 王佳琦 孙宏磊 |
| |
| 作者单位： | 1. 浙江大学 软弱土与环境土工教育部重点实验室，杭州 310058；2. 温州大学 建筑工程学院，浙江 温州 325035 |
| |
| 摘 要： | 天然土体通常为非均质、各向异性土体，目前常用的基坑抗隆起计算方法多是针对均质各向同性土体的。采用非均质非线性各向异性岩石破坏准则，考虑土体原生各向异性，假定Prandtl破坏模式，采用地基承载力模式进行基坑的抗隆起稳定性分析。根据滑移线理论计算承载力，利用有限差分法结合边界条件编制出相关计算程序，并定义基坑抗隆起稳定性系数。研究表明，各向异性比的提高会降低安全系数；内摩擦角和插入比的增大可有效提高基坑的稳定性。
|
| 关 键 词： | 原生各向异性 抗隆起 承载力 滑移线法 |
| 收稿时间： | 2010-10-21 |
Analysis of stability against upheaval for foundation pit with anisotropic soil strength |
| |
| CAI Yuan-qiang
,
WANG Jia-qi
,
SUN Hong-lei.Analysis of stability against upheaval for foundation pit with anisotropic soil strength[J].Rock and Soil Mechanics,2012,33(4):1117-1122. |
| |
| Authors: | CAI Yuan-qiang WANG Jia-qi SUN Hong-lei |
| |
| Institution: | 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China |
| |
| Abstract: | Natural soil is usually nonhomogeneity and anisotropy.However,the calculation methods of stability against upheaval which are commonly used are applicable to isotropic and homogeneous soils.Considering the failure criterion of nonhomogeneous nonlinear anisotropic rocks and the primary anisotropy of soil,assuming Prandtl failure mode,analysis of stability against upheaval is given using the model of foundation pit bearing capacity.According to capacity calculated by the slip line method and using finite difference method combined with boundary conditions,the related calculation program is compiled;then stability coefficient against upheaval is defined.The results show that the larger the anisotropy ratio of soil strength is,the smaller the safety factor is.And with the increasing of internal frictional angle and the retaining wall insertion ratio,the safety factor will be enhanced significantly. |
| |
| Keywords: | primary anisotropy against upheaval bearing capacity slip line method |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
