不同类型止水帷幕基坑涌水量计算方法探讨

Calculation Method of Water Inrush in the Foundation Pit of Different Types of Water-resisting Curtain

建设单位在进行基坑降水时,根据基坑周边环境条件常常要设置不同类型的止水帷幕,目前现行的国家、地方标准或规程中对设有止水帷幕基坑涌水量的计算方法并不全面甚至未涉及。由于不同形式止水帷幕的止水效果差异较大,在基坑降水涌水量计算时,因止水帷幕形式不同而给工作人员带来较大困惑,计算方法不当有可能造成计算结果差异较大。对近几年河北中东平原住宅小区开发中基坑止水帷幕设置的类型和计算方法进行了总结,以达到提高涌水量计算精度的目的。

When carrying out precipitation in foundation pits,construction units often need to set up different types of water-resisting curtains according to the environmental conditions around the foundation pit.At present,the current national and local standards or regulations to calculate the water flow amount in foundation pits with water-resisting curtains are not comprehensive or even covered.Due to the large differences in the sealing effect of different forms of waterproof curtains,when calculating the water inflow in foundation pits,the different forms of water-resisting curtains bring great confusion to the staff.Improper calculation methods may cause large differences in calculation results.This paper summarized the of foundation pit waterproof curtains types and calculation methods of water inflow in the development of residential communities in the Middle East Plains of Hebei Province in recent years,so as to improve the accuracy of water inflow calculation.