深基坑土钉墙支护稳定性分析方法的改进及其设计软件的开发  

Improvement on analytical method for supporting stability of soil-nailed wall in foundation excavations and its design software development

作　　者：朱彦鹏[1] 李忠[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2005年第6期123-126,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省科技攻关项目(GK974-调-9)

摘　　要：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,并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.利用VisualC++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边坡整体稳定性进行实时分析.结合工程实例,进一步分析和讨论了土钉墙设计中存在的问题、适用条件及影响因素等,得知:最危险滑移面的圆心位置随土钉设计参数的变化而动态变化,故不同开挖阶段整体稳定性验算必不可少;对于地质条件较差的情况,应借助现场测试及工程经验指导设计和施工.Taking into consideration of soil nailing effects, stability analysis method of soil-sailed wall was improved, and the dependence of safety coefficient on the center of arc slip surface was derived. The existence region of this arc center was determined with the help of the computer, and the center of the most dan- gerous arc slip surface was＇searched dynamically with the method of lattice. Using Visual C＋＋ ,a design software for soil-nailed wall in foundation excavation was developed. Bearing capacity of soil nailing was calculated, and the stability of soil-sailed wall at every excavation stage was analyzed real-timely. One engineering project was designed and analyzed with this software, and some problems existing in the design of soil-nailed wall were further discussed and analyzed. With the change of soil nailing parameter, the center of the most dangerous arc slip surface changes dynamically, so that the check calculation of stability is inevitable at every excavation stage. For the situation of bad geology, the design and construction of soil nailing must be guided by on-the-spot test and engineering experience.

关 键 词：土钉墙 稳定性 圆弧条分法 滑移面 软件开发 

分 类 号：TU47[建筑科学—结构工程] TU311.41[建筑科学—土工工程]