深基坑开挖与不同支护方案的优选  

Optimal Scheme on Excavation and Shoring of Deep Foundation Pit

作　　者：陶文慧[1] 王国标 杨宏丽 赵杰[4] 尹小涛[5] 

机构地区：[1]浙江省丽水市建筑工程施工图审查中心,浙江丽水323000 [2]浙江佳境规划建筑设计研究院有限公司,浙江杭州310041 [3]西安长庆科技工程有限责任公司建筑设计部,陕西西安710021 [4]中交第一公路勘察设计研究院西安中交公路岩土工程有限责任公司,陕西西安710002 [5]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《土工基础》2006年第2期77-81,共5页Soil Engineering and Foundation

摘　　要：以某深基坑工程为例,利用有限元方法对其进行了支护桩几何尺寸对支护效果影响程度的数值模拟,得出了支护桩的最优尺寸;在此基础上,对深基坑开挖和支护过程中经常采用的支护桩、桩锚结构和桩加内支撑结构三种形式根据不同方案进行了数值模拟,得出了锚杆和支撑施加的最佳部位;同时经对比分析各支护形式下最优方案的应力水平云图后发现桩加内支撑支护形式是最适合本基坑工程的支护形式。最终为同类地质条件下的相似基坑工程的优化设计提供了参考依据。Taking a deep foundation pit as example, numerical simulation of shoring pile with different geometrical dimension which have different shoring effect is done by means of finite element methods. Then, the optimal dimension of pile is obtained. Based on these, three shoring methods which are often adopted in excavation and shoring of deep foundation pit such as shoring pile, pile ＆ anchor and pile ＆ inner brace, are simulated according to different schemes. After analyzing the numerical results, the optimal location of anchor or inner brace acting pile is determined. Simultaneously, contours of the optimal scheme in each shoring method are compared and pile ＆ inner brace scheme is found to be the most acceptable one. Finally, the reference law of optimal design in the similar engineering with the same geological condition is presented too.

关 键 词：深基坑 开挖 支护桩 锚杆 支撑 有限元数值模拟 

分 类 号：TU472[建筑科学—结构工程]