室内变水头渗透试验误差产生的原因探讨

Discussion on Causes of Errors in Indoor Variable Head Permeability Test

变水头渗透试验是在钻孔内进行的一种测定土体渗透系数的一种广为应用的野外试验方法。室内进行会出现误差,文章首先分析室内变水头渗透机制及原理,探讨了变水头渗透试验中误差产生的原因,从而减少误差的产生,保障试验结果的准确性和科学性。通过对土体渗透系数的试验计算基坑涌水量及计算沉降所需时间,从而更好的掌控基础工程及基坑工程的设计与施工。

Variable head permeability test is a widely used field test method for measuring soil permeability coefficient in borehole. There will be errors when it is carried out indoors, Firstly, this paper analyzes the mechanism and principle of indoor variable head permeability test, and discusses the causes of errors in variable head permeability test, so as to reduce the errors and ensure the accuracy and scientificity of test results. Calculate the amount of water inflow and the time required for settlement through the experiment of soil permeability coefficient, so as to better control the design and construction of foundation engineering and foundation pit engineering.