地铁工程深基坑的变形监测研究

Study on Deformation Monitoring of Deep Foundation Pit of Subway Engineering

文中针对浙江省某地铁线路开展地铁深基坑不同位置的变形监测。结果表明,不同位置及不同监测时间下的基坑沉降量、围护墙水平位移、立柱桩竖向位移以及周边建筑沉降量存在一定的波动,但波动范围较小,累计的最大基坑沉降量仅达到5.7 mm,累计的最大地下连续墙水平位移为15 mm,累计的最大立柱桩竖向方向位移为14.2 mm,累计的最大周边建筑沉降量为11.3 mm。各个位置的累计值及监测变异系数均满足规范要求,证明本项目深基坑工程安全可靠。

In this paper,deformation monitoring at different positions of deep foundation pit of a subway line in Zhejiang Province was carried out.The results show that the settlement of foundation pit,the horizontal displacement of retaining wall,the vertical displacement of column piles and the settlement of surrounding buildings have certain fluctuations under different positions and different monitoring times,but the fluctuation range is small.The cumulative maximum settlement of foundation pit is only 5.7 mm.The cumulative maximum horizontal displacement of diaphragm wall is 15 mm.The cumulative maximum vertical displacement of the column pile is 14.2 mm.The cumulative maximum surrounding building settlement is 11.3 mm;The accumulated value and monitoring variation coefficient of each position meet the standard requirements,which proves the safety and reliability of the deep foundation pit project.