深基坑裂隙带压涌水钢桶止水方法应用

Application of Steel Sealing Method in Deep Foundation Excavation Cleftiness Water Burst with Pressure

中国较多城市位于地下水丰富的地区,长期饱水黏土在地质变动下会出现带压裂隙涌水。带压裂隙涌水有出水量大、出水点范围小、出水点集中于基坑较低点的特点。采用钢桶止水方法可有效控制饱水地质地貌下的裂隙带压涌水情况,具有施工方便、使用成本低、适用性强、不影响基础施工的优点。通过在昆明南市区多个地下室工程的施工实践,总结出针对带压裂隙涌水止水措施。

Many cities in China are located in the area where groundwater is rich. Long term saturated clay will come into being with pressure and fracture. There is a large amount of water discharge, a small range of water outlet points, and the point of water outlet is concentrated at the lower level of the foundation excavation. This paper adopts the steel sealing method which can effectively control the water saturated geological fracture zone under the pressure of water, has the advantages of convenient construction, low cost, strong applicability, no effect on foundation construction. Through the construction practice of several basement projects in the Southern District of Kunming City, the measures of water inrush and water stopping for pressure cracks are summarized.