鄂西恩施地区非饱和土降雨入渗规律  

Rainfall Infiltration Mechanism of Unsaturated Soil in Enshi of Western Hubei Province

作　　者：丰光亮[1] 胡新丽[1] 吴刚[1] 孙淼军[1] 章广成[1] 

机构地区：[1]中国地质大学工程学院,武汉430074

出　　处：《地质科技情报》2010年第5期112-116,共5页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40872175)

摘　　要：在分析鄂西恩施地区降雨特征的基础上,选取6组典型降雨条件,设计并进行了室内人工降雨土柱非饱和入渗试验。通过实测土体体积含水率,揭示了鄂西恩施地区非饱和土降雨入渗规律,获得了降雨入渗影响区体积含水率变化规律、入渗前锋运移规律以及降雨强度和历时对入渗的影响规律。通过GeoStudio软件对室内降雨试验进行了数值模拟,数值模拟结果与试验结果基本相同,进一步验证了降雨入渗规律。同时依据实测结果,分析了数值模拟的不足之处,为通过数值模拟方法研究非饱和土降雨入渗奠定了基础。Infiltration of rainfall into a unsaturated soil slope is a key factor to cause failure of landslides.Based on the analysis of the character of landslides in Enshi of western Hubei,the paper elucidates the process and mechanism of the rainfall infiltration on six kinds of rainfall conditions through self-designed soil column tests.It discusses the change law of volume water content and the transport law of the front of the infiltration.The paper also analyses the influence of rainfall intensity and rainfall duration to rainfall infiltration.The study conducts numerical simulation for the laboratory test by GeoStudio software.Results of the laboratory test and the numerical simulation are almost the same.It validates the mechanism of infiltration of rainfall into a slope.According to the measured data,the study analyses the shortage of nu-merical simulation.This lays the foundation for studies on infiltration of rainfall into a unsaturated soil slope through numerical simulation.

关 键 词：降雨 非饱和土 土柱入渗试验 入渗规律 数值模拟 

分 类 号：P642.1[天文地球—工程地质学]