摘要
利用土力学中的极限平衡理论 ,详细地论述并推导出一种定量分析深基坑基底软土稳定性的计算方法 ,其特点是能够合理地考虑各种土体加固对基底稳定安全系数KS 增值的效应。还探索了KS 的变化规律 。
A calculation method to analyze the subsoil stability under deep excavation is proposed It is based on the theory of limit equilibrium in soil mechanics The effects of the various strengthened soil on the increment of safety coefficient Ks of subsoil stability under deep excavation can be reasonably considered The mechanism of the variation of Ks is discussed and a case study is given as an example The results shows that the value of Ks will not increase distinctly while the depth ratio(D/H)is more than 0 7 The lower limit of the depth ratio may be taken as 0 7 when the excavation depth is over 10m The effective measure to increase the value of Ks is the way to stabilize the passive subsoil The proposed method is practicable and valuable for designer and constructor
出处
《土木工程学报》
EI
CSCD
北大核心
2001年第2期84-88,95,共6页
China Civil Engineering Journal
基金
国家自然科学基金资助项目!批准号 :597381 60高等学校博士学科点专项科研基金!批准号 :970 2 4 71 9
关键词
深基坑
稳定安全系数
土力学
稳定性
deep excavation,safety coefficient Ks of subsoil stability,effect on increment of Ks,depth ratio
