基于深基坑土钉支护的可靠性分析  

Analysis of Reliability of Using Soil Nail as the Deep Excavation Supporting Structure

作　　者：杨一洲 YANG Yizhou(Guangxi Beitou Environmental Water Group Co.,Ltd.,Nanning 530022)

机构地区：[1]广西北投环保水务集团有限公司,南宁530022

出　　处：《土工基础》2022年第3期395-399,共5页Soil Engineering and Foundation

摘　　要：传统定值法设计基坑土钉支护体系存在基坑开挖失稳等问题,为解决此问题,运用验算点法和Monte Carlo法对某工程的基坑支护设计方案进行平移破坏、抗倾覆破坏及抗拔破坏的可靠性分析。研究表明,验算点法和Monte Carlo法计算出的基坑破坏类别可靠指标存在一定误差,结合理论与工程实践,建议设计师采用验算点法;按照可靠度程序验算可指出基坑应加强支护的具体位置。The traditional fixed-value method of designing the soil nail support system for a deep excavation project has challenges such as failure of the excavated area.Therefore,the reliability analysis of various failure modes such as,translational,overturning and pulling failures in the excavation support design of a project were performed by using the checkpoint method and Monte Carlo method.The results indicated that there are some errors in the reliability indices of the supporting structure failure categories predicted by the checkpoint method and the Monte Carlo method.Based on the theoretical and practical project experience,this paper recommends that the checkpoint method should be used.The reliability approach can provide the specific location of the supporting structure that requires improvement.

关 键 词：基坑支护 验算点法 可靠指标 Monte Carlo法 

分 类 号：TU473[建筑科学—结构工程]