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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。
Combined with some examples of adaptive engineering of foundation pit dewatering, the technology of deep foundation pit dewatering under severe deformation conditions was studied. The results show that when the need for deep foundation pebble (15m above) the implementation of precipitation, and the surrounding terrain objects in the process of precipitation deformation control is extremely stringent, waterproof curtain combined with well point method of precipitation and the addition of support Guarantee the foundation pit smooth precipitation. In addition to using conventional pit deformation monitoring system and water level monitoring system to control the precipitation process from time to time, the tilt (or displacement) monitoring of important buildings is an effective guarantee for the smooth implementation of the project’s precipitation and has important reference value for similar projects.