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STUDY ON SUBSOIL STABILITY UNDER DEEP EXCAVATION

Hu Zhanfei Zhou Jian Yang Linde (Tongji University)  
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
【Fund】: 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
【CateGory Index】: TU432
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