摘要
结合某适应性改造工程基坑降水工程实例,对严格变形条件下深基坑降水技术进行了研究。结果表明,当需要对卵石层深基坑(15m以上)实施降水,而周边地形地物对降水过程中的变形控制极为严格的情况下,隔水帷幕结合井点降水并增设内支撑的方法能保证基坑顺利降水。除运用常规的基坑变形监测系统及水位监控系统对降水过程进行时时把控外,重要建筑物的倾斜(或位移)监测是工程降水顺利实施的有效保证,对类似工程具有重要的参考价值。
Combining with an adaptive reconstruction project of deep foundation pit precipitation engineering example,the dewatering technique in pebble bed foundation pit under rigorous deformation control is expounded. The construction experience shows that the waterproof curtain combining with the well dewatering and internal support could reduce the water level of foundation pit and control settlement deformation smoothly when the depth of the dewatering is deeper than 15 m,the ground deformation limit value is small and the recharge technique couldn＇t be implemented. During the period of dewatering,the surface subsidence control system and the automatic monitoring and control system of water level are the effective safeguard for the engineering dewatering.
出处
《工程勘察》
2017年第8期17-22,共6页
Geotechnical Investigation & Surveying
关键词
深基坑
降水
水位监测
变形控制
deep foundation pit
dewatering
water level monitoring
settlement control
