深基坑土钉支护稳定性分析方法的改进及软件开发

在考虑土钉作用的情况下,对土钉墙支护边坡整体稳定性分析方法进行了改进,推导了圆弧圆心与安全系数之间的函数表达式,借助计算机确定了滑移面圆心所在区域,利用网格法对最危险滑移面的圆心进行动态搜索。采用面向对象程序设计语言VC++,依据《建筑基坑支护技术规程》JGJ120-99开发了基坑土钉支护设计软件,实现了土钉抗拉承载力的计算,并对各个开挖阶段土钉墙支护整体稳定性进行实时分析。最后,结合具体工程实例进行了设计与分析,进一步分析和讨论了土钉墙设计中存在的问题、适用条件及其影响因素等,分析后所得的结果可供工程设计人员参考。

Improvement on stability analysis of soil nailing in foundation excavations and its software development

Under the situation of considering soil nailing effects, stability analysis of soil sailing wall was improved, and the function relation between safety factor and position of centre of circular sliding surface was derived. The region of centre of circular slip surface was determined by computers, and the centre of the most dangerous silding surface was searched dynamically by method of lattice. Using object-oriented programming language VC++, and according to Technical Specification for Retaining and Protection of Building Foundation Excavations—JGJ 120-99, design software for soil nailing wall was developed. Tensile strength of soil nailing was calculated, and stability of soil sailing wall at each excavation stage was analyzed. Finally, an engineering project was designed and analyzed by this software, and some problems were further discussed and analyzed in the design of soil nail wall. It is a useful reference for engineers.