摘要
杂填土层压缩性高,在工程施工中具有明显的特征,开挖过程中极易出现边坡失稳事故。本文以某隧道施工为案例,通过对微型钢管桩桩顶水平位移和竖向位移、支撑结构轴力及地下水位的监测,对开挖后桩体位移、钢支撑内力变化及水位变化情况进行了分析,并以这四个指标为依据,对微型钢管桩支护下杂填土范围内基坑开挖的安全性进行了研究。
Due to the high compressibility of the miscellaneous soil layer,there are obvious differences in the construction of the project.It easily causes the accidents of slope instability in the process of excavation.In this paper,taking a tunnel construction as an example,through monitoring the horizontal displacement and vertical displacement of the top of the micro steel pipe pile,the axial force of the supporting structure and the groundwater level,the changes of the pile displacement,the internal force of the steel support and the water level after excavation are analyzed.Based on these four indexes,the safety of the excavation of the foundation pit within the range of miscellaneous fill under the support of the micro steel pipe pile is studied.
作者
毛元伟
张佳
Mao Yuanwei;Zhang Jia(State Grid Beijing Fangshan Power Supply Company,Beijing 102401,China)
出处
《城市建筑》
2020年第29期113-114,117,共3页
Urbanism and Architecture
关键词
杂填土
微型钢管桩
监测
支护效果
miscellaneous fill
micro steel pipe pile
monitoring
support effect
