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Design for the Slope of Foundation Pit with Rock Bed and Selection of the Slipline
Author(s): 
Pages: 20-23
Year: Issue:  12
Journal: Geotechnical Investigation & Surveying

Keyword:  基坑边坡 滑移线 条分法 有限元强度折减法;
Abstract: 本文在分析两次基坑边坡塌方事故的基础上,总结了两个边坡的共性。分别选取直线和圆弧线作为滑移线,利用条分法进行稳定性演算,并与有限元强度折减法求得的安全系数进行比较,发现直线条分法与强度折减法得到安全系数相近,都大于圆弧条分法得到的安全系数,而且有限元法得到的塑性贯通区近似直线而非圆弧线,充分证明了坑底为岩石、边坡部分为土层的基坑边坡,其失稳滑移线应取直线。最后依据两次事故的经验,针对该类边坡的支护设计提出一些建议。
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