摘要
严寒冻土区桩锚支护过程中的基坑受冻胀作用而导致基坑产生变形甚至发生坍塌事故屡屡发生,对基坑进行及时、准确的监测分析,采取相应防治措施,能有效降低发生事故的风险。通过采用全过程实时监测的方式,以长春市地铁2号线西兴站装配式车站工程深基坑为工程背景,根据严寒冻土区基坑冬季受力特点并结合工程地质条件研究了施工现场周围土体的沉降、支护体系的受力变形以及基坑外地下水的变化特征,分析了土体冻胀以及冻融循环对基坑稳定的影响。
During the process of pile-anchor support in the cold-frozen soil, the foundation pit is deformed by the frost heave, and the collapse of the foundation pit occurs. Even the occurrence of the collapse occurred frequently. The timely and accurate monitoring and analysis of the foundation pit and the corresponding prevention and control measures can reduce the occurrence. The risk of the accident. Based on the real-time monitoring of the whole process,the deep foundation pit of the assembly station of Xixing Station of Changchun Metro Line 2 is taken as the engineering background. According to the characteristics of the winter foundation in the cold permafrost region and the engineering geological conditions. The deformation of the surrounding soil,the deformation of the supporting system and the change of the groundwater in the foundation pit. The influence of the frost heave and the freeze-thaw cycle on the stability of the foundation pit are analyzed.
出处
《建筑技术开发》
2018年第4期107-109,共3页
Building Technology Development
关键词
基坑
锚桩支护结构
开挖监测
冻胀作用
foundation pit
anchor pile support structure
excavation monitoring
frost heave effect
