滑坡体降雨入渗的高密度电法模型试验研究

Experimental study of rainfall infiltration on the landslide model using high density resistivity method

降雨作为影响滑坡体稳定性的主要因素之一,其在坡体中的入渗过程难以监测.高密度电法作为一种无损监测手段,其具有操作便捷、对监测对象扰动小的特点,可实现滑坡体水分运移的高效实时监测.基于高密度电法监测技术,通过饱和度测定试验建立岩土体电阻率与饱和度之间的数学关系,开展间隔降雨条件下滑坡体的高密度电法监测模型试验.电阻率反演结果揭示了滑坡体在间隔降雨条件下水分的运移规律和坡体渗透破坏过程,验证了采用高密度电法监测滑坡体降雨入渗过程中水分迁移的可行性.

As one of the main factors influencing the stability of landslides,the infiltration of moisture in slopes is tricky to monitor.As a harmless method to the monitored object,the high density resistivity method contains characteristics including convenient operation and little disturbance to landslides while monitoring,which can realize the efficient real-time monitoring of moisture migration in slopes.Based on the high density monitor system,a precipitation experiment was established.This experiment was carried out to monitor the mathematical relationship between the resistivity and water content using a monitor system of high density resistivity method.Before that,another experiment had been established to determine the relationship between the resistivity of landslide and water content.The results of the resistivity inversion reveal the transport law of the moisture inside the landslides and the destruction process of slopes under series of precipitation,which proves that the migration of water during the infiltration of rainfall inside the slopes can be monitored by high density resistivity method.