激发极化微分测深法在探测水库坝基中的研究及应用

在水库坝基勘探中，取得渗透系数K值的常规方法是通过钻孔进行抽水或压水试验，这种方法需要布置大量钻孔，除受地形条件限制外，还存在速度慢，用工多，投资大等缺点，为此，利用激发极化微分溶测法对水库坝基进行详细探测，依据探测成果只需通过少量钻探进行抽水（或者压水）试验，求得K值，然后对探测成果和钻探试验成果进行综合分析，得到计算视渗透系数Ks公式，以此式计算水库坝基区域视渗透系数Ks值，确定是否需要进行防渗处理，该方法具有投资省，进度快，易操作等特点，是水库坝基勘探中的一条有效途径。

Research on Application of Exciting Polarization Differential Sounding Method to Exploration of Reservoirs

By using the exciting polarization differential sounding method to explore reservoirs′ dam foundations in detail, and according to the exploration results to guide carrying out pumping test (or water pressure test) for a few boreholes, then the coefficient of permeability K can be obtained. After that, the comprehensive analysis of exploration results and the test results of boreholes is carried out so as to obtain a formula for calculating apparent coefficient of permeability K. And using this formula to calculate the apparent coefficient of permeability Ks of the reservoir′s dam foundation area, then according to the Ks value that the anti-seepage treatment is needed or not, can be determined. This method has following advantages: saving investment, speeding construction progress, and easier in operation, etc. It is an effective way for exploring reservoirs′ dam foundations.