哈尔滨工程大学学报2011，Vol.32Issue(10)：1300-1304,5.DOI:10.3969/j.issn.1006-7043.2011.10.007
基于可靠性的复合土钉支护基坑稳定性分析
Reliability-based stability analysis of a foundation pit supported by composite soil nailing
赵延林 1安伟光2
作者信息
- 1. 哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001
- 2. 黑龙江科技学院建筑工程学院,黑龙江哈尔滨150001
- 折叠
摘要
Abstract
In order to establish the reliability calculation of the inner global stability of a foundation pit supported by a prestressed anchor composite soil nailing,and based on the slope limit equilibrium theory and the circular sliding surface method,the state equation of limit equilibrium and the calculation model of the most dangerous sliding surface for inner global stability of a foundation pit was established using the disturbing force method. Additionally,the searching and solving method of the most dangerous sliding surface was optimized with the sequential linear programming(SLP)optimization method and the simplex optimization method. Then with the shear strength indexes of soil as random variables,the reliability index of inner global stability of the foundation pit was calculated using the advanced first order second moment method(AFOSM)(2)method,and a practical project was used for final analysis. The analysis shows that the reliability index of the inner global stability of the foundation pit is affected greatly by the coefficients of the variability of the cohesion,internal friction angle,and friction of soil,and also decreases with the increase of the coefficient of variability. The reliability index is affected the most by the coefficient of the variability of the internal friction angle and the least by the coefficient of the variability of the friction. Within the depth of the excavation,the reliability index is affected more by the middle and lower soil layers and less by the upper soil layers.关键词
预应力锚杆/复合土钉/基坑/内部整体稳定/可靠性Key words
prestressed anchor/composite soil nail/foundation pit/stability/reliability分类
能源科技引用本文复制引用
赵延林,安伟光..基于可靠性的复合土钉支护基坑稳定性分析[J].哈尔滨工程大学学报,2011,32(10):1300-1304,5.
