摘要
以北京某典型的桩锚-土钉组合支护为例,采用国际通用岩土工程软件FLAC(fast Lagrangian analysis of continua)-2D,对桩锚复合土钉支护中土钉的内力及变化规律进行了研究,并和现场实测结果进行了比较.实测数据与规范、数值模拟结果的对比分析表明,桩锚复合土钉支护土钉的受力略小于同样条件下纯土钉墙支护土钉的受力;土钉内力变化规律与土钉墙支护土钉内力变化基本一致;桩锚复合土钉支护土钉部分的破裂面与规范破裂面在底部差异较大.探讨了现有复合土钉支护计算方法的不足,同时也表明了用FLAC软件进行复合土钉支护土钉内力分析和优化设计,可以得到较好的结果.
This paper discusses the soil nail＇ s axis force of the pile-anchor composite soil-nailed wall in a deep foundation pit. Fast Lagrangian analysis of continua （FLAC） is used to analyze the interior force in soil nails. Results of the numerical analysis show that the interior force of soil nails in the composite soil-nailed wall is slightly less than that in the soil-nailed wall and the change law of the interior force is the same as that of the soil- nailed wall. These results are very close to the in-situ measurements. Furthermore, a comparison of slip surface between the composite soil-nailed wall and the traditional methods is made, and there are some differences between them. The measurements show that FLAC can be used to analyze the interior force in soil nails.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2011年第9期1338-1342,共5页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(50678003)
北京市科技发展支持项目(200710005004)
关键词
桩锚复合土钉支护
土钉墙
数值模拟
岩土工程软件(FLAC)
pile-anchor and soil-nailed composite retaining structure
soil-nailed wall
numerical analysis
fast Lagrangian analysis of continua （FLAC）
