基于抽水试验判别土层的透水性

Water permeability of soil layer based on water pumping test

以南京地铁七号线莫愁湖站为例,选取莫愁湖站的一口试验井进行抽水试验,通过观测水表,记录数据,整理资料并计算出渗透系数,再根据《城市轨道交通岩土工程勘察规范》中对透水性的划分,得出该站点土层的透水性类别,从而为基坑降水设计方案提供依据,为安全施工做好铺垫。

Taking the Mochou Lake Station of Nanjing metro line seven as an example,the test well of Mochou Lake Station is selected to carry out the pumping test. The coefficient of water permeability can be calculated by observing the water level,recording the data and sorting the data.The water permeability of soil layer of the site is obtained according to the classification of The Code for Geotechnical Investigations of Urban Rail Transit. This will provide a basis for the design of foundation pit dewatering and lay a good foundation for safe construction.