土钉结构稳定验算的经验遗传–单纯形算法  

Interior stablility analysis method of soil-nailed structure based on empirical genetic-simplex algorithm

作　　者：杜修力[1] 王智慧[1] 李立云[1] 姜丽萍[1] 侯世伟[1] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100022

出　　处：《岩土工程学报》2007年第4期598-602,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家杰出青年科学基金资助项目(50325826);北京市教育委员会科学技术与研究生教育建设资助项目(4700001401509)

摘　　要：针对基坑开挖的土钉支护问题,提出将经验遗传–单纯形算法应用于支护结构的稳定性验算,并与一般遗传算法的结果进行了比较。比较结果表明:本文建议的方法更有效和准确。文中还对一个具体的工程实例使用本文建议的方法进行了验算分析,并与商业软件的分析结果做了比较。结果表明:该商业软件未能搜索到最危险滑裂面,其结果对稳定性评价是偏于不安全的。此外,在土钉支护的稳定性验算过程中,一些优化程序在求解安全系数时将土层看作或是转化为均质土,而本文方法考虑了土体的分层。Based on empirical genetic-simplex algorithm （EGSA）, an analytical method of the interior stability of soil-nailed structure for deep foundation pits was proposed. Compared with genetic algorithm （GA）, it was shown that EGSA was better than GA. The calculation of the integral stability of a practical engineering example was carded out by using the proposed method and commercial software respectively. It was shown that the most dangerous sliding-plane could not be found out and its evaluation on stability was unsafe by using the commercial software. Furthermore, during calculating the interior stability of soil-nailed structure, the soil deposit was commonly regarded as homogeneous. In this paper, the stratified character of soil deposit was considered.

关 键 词：经验遗传-单纯形算法 基坑 土钉结构 稳定验算 

分 类 号：TU443[建筑科学—岩土工程]