摘要
单层支撑基坑抗倾覆稳定性验算至关重要。本文以宁波地区某一发生倾覆破坏的单层支撑基坑为例,主要研究支护结构体桩长、桩径和单层支撑标高,以及地面超载和嵌固段土体强度参数等影响因素。敏感性分析研究表明:对单层支撑基坑抗倾覆稳定性的主要影响因素有基坑开挖深度、围护体桩长和嵌固段土体强度;次要影响因素有地面超载、单层支撑位置;围护体桩径无影响。研究成果可为类似基坑支护设计和施工风险管控提供有益参考。
It is critical to check the anti-overturning stability of single-layer support in deep excavation project.A case study of a collapsed deep excavation project with single-layer support in Ningbo was carried out.The influence factors such as length and diameter of soldier pile,location of the single-layer support,ground surcharge load and soil strength parameter in the embedment section are mainly discussed.The sensitivity analysis shows that the main factors affecting the anti-overturning stability of single-layer support are excavation depth,retaining pile length and soil strength parameter of the embedment section;the secondary influencing factors are ground surcharge and the elevation of the support;the diameter of retaining pile has no effect.The research results can provide useful reference for the similar excavation support design and risk control in the construction.
作者
阳吉宝
Yang Jibao(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)
出处
《工程勘察》
2020年第3期26-31,共6页
Geotechnical Investigation & Surveying
关键词
单层支撑
基坑
抗倾覆稳定性
敏感性分析
single-layer support
deep excavation
anti-overturning stability
sensitivity analysis
