北京某深基坑工程施工监测与成果分析

本文介绍了北京某深基坑工程的支护设计、施工和监测方案,并对主要监测结果进行了详细分析。监测结果表明,在深基坑支护工程中,时空效应显著,基坑开挖初期围护结构及地表会发生向上的位移,基坑深层土体开挖会引起较大的桩体位移和土体沉降,施工中应严格控制深层土体开挖无支撑暴露的时间,及时架设支撑及浇注混凝土底板,减小土体侧向位移及地表沉降,由于基坑施工周期较长,温度的季节性变化对基坑围护结构的变形影响较大。

Construction monitoring and results analysis of a deep foundation pit engineering in Beijing

This paper introduces the supporting design,construction and monitoring scheme of a deep foundation pit engineering in Beijing,and analyzes the main monitoring results.The monitoring results indicate that in deep foundation pit engineering,the time space effect is very significant,and thus,the retaining structure and surface will induce upward displacement in the early stage of foundation pit excavation.Meanwhile,the deep soil can cause large pile displacement and earth settlement.Therefore,during the const...