摘要
对上海某地铁车站深基坑工程施工中周边建筑物垂直位移、围护结构变形、钢支撑轴力和地下水位等进行了监测.监测结果分析表明:周边建筑物的沉降主要发生在基坑土方开挖的过程中,基坑施工过程中的时空效应较明显,条形基坑应分段施工;基坑围护在开挖过程中受周边环境的影响,有可能发生一边沉降、另一边上抬的变形现象;围护结构的侧向变形主要发生基坑开挖阶段,最大变形处位于基坑开挖面附近;在基坑开挖中应合理掌握开挖的次序,安装支撑及时,这对于有效控制围护结构侧向变形大有益处;坑外水位的变化能反映基坑围护的密封效果,发现渗漏后需及时处置.
Based on the analysis of the monitoring data of a deep foundation pit for a rail station of Shanghai Met-ro, such as vertical displacement of buildings, deformation of retaining structures, axial force of steel struts aswell as underground water levers, some valuable conclusions were drawn. It is shown that the settlement of build-ings mainly occurs in the process of excavation, that thetion of foundation pit, and that the stripe foundation pittime-space effect is apparent in the process of construc-should be constructed in sections. Because of the influ-ence of surroundings, one side of the retaining structure may be subsided while the other side may be upheaved.The lateral deformation of the retaining structure mainly occurs in the process of excavation and the maximal de-formation is located near the excavation surface. The good order and timely support of excavation help control thelateral deformation of the retaining structure effectively. The water level outside the pit could reflect the sealingeffect of the retaining structure, and the timely disposal of leakage should be taken while there is a crack in theretaining structure.
出处
《绍兴文理学院学报》
2016年第7期23-28,共6页
Journal of Shaoxing University
关键词
深基坑
监测
信息化
沉降
轴力
deep foundation pit
monitoring
informationized construction
settlement
axial force
