超大深基坑工程承压水控制设计及施工技术研究

Research on Control and Construction Technologies for Confined Water in Supper Deep Foundation Pit

摘要: 论文针对北京某深大基坑承压水降水工程特点，选取了管井降水方式，计算提出了井距8 m和井深36 m设计方案；并创造性地提出了分区封闭、临时封闭等施工措施，降低了降水施工难度；通过地下水水位的监测和周边沉降监测，验证了本设计的合理性。最后，提出了井水的二次利用方案，提高了地下水的利用效率，符合绿色施工理念。

Abstract: According to the characteristics of a dewatering engineering for the deep confined water foundation pit in Beijing, tube well precipitation is selected and the design parameters of well spacing in 8 m and 36 m are proposed. The construction measures as partition closed, temporarily closed, etc. are put forward to reduce the difficulty of precipitation construction creatively. To verify the rationality of the design, the underground water table and peripheral subsidence are monitored. Finally, the secondary utilization scheme of well water is put forward to improve the utilization efficiency of groundwater, which is accord with the concept of green construction.