松散堆积土边坡充气排水方法  

Air-Filled Drainage Method in Loose Accumulation Soil Slope

作　　者：杜丽丽[1] 孙红月[2] 尚岳全[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江大学海洋科学与工程学院,杭州310058

出　　处：《吉林大学学报（地球科学版）》2013年第3期877-882,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家科技支撑计划课题(2012BAK10B06);高等学校博士学科点专项科研基金项目(20100101110026)

摘　　要：坡体地下水是影响边坡稳定的主要因素,将水排出往往能够阻止滑坡的启动。通过应用基本理论和模型试验对高压充气法应用在边坡排水工程中的可行性进行研究分析。结果表明:将高压充气排水法应用在边坡排水工程中是可行的,且适用于土体中最大孔径大于5.0μm的边坡;气驱水过程存在初始充气气压且存在上限值;气排水速度与土体渗透系数和充气气压成正比、与水头高度和孔隙通道半径成反比;气排水过程中土体大孔隙通道内产生优先流现象。The groundwater in slope is one of the main factors that affect its stability.Draining water from slope can prevent the landslide from booting.The feasibility of applying compressed air to drain water in slope engineering by using basic theory model test was analyzed.It is concluded that this drainage method for slope is feasible and applicable to soil with pores radius above 5.0 μm,and the process of draining water with pressure air has the initial pressure.The drainage rate presents a proportional relation to the permeability coefficient and air pressure,and an inverse relation to the water head and pore radius.The preferential flow could be observed in bigger pores.

关 键 词：边坡 饱和土体 高压充气排水法 初始充气气压 优先流 

分 类 号：P642.22[天文地球—工程地质学]