岩土工程学报2012，Vol.34Issue(2)：210-216,7.
悬臂支护基坑失稳风险的改进风险矩阵分析方法
Improved risk matrix method of instability risk for excavations with cantilever retaining
摘要
Abstract
Instability risk assessment is an important link of design and safe construction of excavations. Firstly, based on a comprehensive analysis of risk events and their risk factors for excavations with cantilever retaining, a comprehensive analysis model of instability risk for excavation engineering is formulated considering the risk probability and risk consequence. Secondly, considering the mechanical mechanism of instability of excavations and the interval uncertainty feature of physical and mechanical parameters of soil, a method to determine the risk probability of foundation instability is presented by introducing the non-probabilistic reliability analysis. Thirdly, based on the information entropy theory, the evaluation method for the risk consequence is formulated, which can reflect the experts＇ evaluation level. And the improved risk matrix method of instability risk for excavations with cantilever retaining is developed. Finally, the method is used to analyze the practical engineering, and it is shown that the proposed method is feasible and reasonable.关键词
基坑工程/风险概率/风险后果/风险矩阵/信息熵/非概率可靠性分析Key words
excavation engineering/risk probability/risk consequence/risk matrix/information entropy/non-probabilistic reliability analysis分类
建筑与水利引用本文复制引用
曹文贵,翟友成,张永杰..悬臂支护基坑失稳风险的改进风险矩阵分析方法[J].岩土工程学报,2012,34(2):210-216,7.基金项目
国家自然科学基金项目(51078137) （51078137）
高等学校博士学科点专项科研基金(20090161110005) （20090161110005）
湖南省自然科学基金项目(08JJ3115) （08JJ3115）
