一维土柱高压充气阻渗法的数值模拟  

Numerical Simulation of High-pressure Infiltration Resistance of One-dimensional Soil Column

作　　者：康剑伟[1] 孙红月[1] 刘长殿[1] 

机构地区：[1]浙江大学海洋科学与工程学系,浙江杭州310058

出　　处：《公路工程》2013年第3期67-71,共5页Highway Engineering

基　　金：国家自然科学基金资助项目(40972187);浙江省重点创新团队支持计划(2009R50050)

摘　　要：滑坡高压充气阻渗法是一种全新的滑坡抢险方法,目的是通过主动方式阻止水流入渗,可以作为一种防止滑坡的抢救性措施。高压充气阻渗法利用了空气可以阻止水流入渗的原理,其阻渗过程是空气驱替水的水气二相流过程。通过有限元数值模拟,综合考虑水气二相流的影响,分析比较了充气和不充气两种情况下一维土柱降雨入渗过程中孔隙水压力、孔隙气压力、体积含水量的变化过程。结果表明:高压充气阻渗法可以减缓水流入渗速度,有效阻止水流入渗。最后还提出了提高高压充气阻渗法数值模拟精度的三点意见。Landslide High-pressure Infiltration Resistance is a new landslide rescue method,the aim is to prevent water infiltration through a proactive approach,which can be used as a rescue measures to prevent landslide.High-pressure Infiltration Resistance uses the principle of air can prevent water infiltration;the drainage process is two-phase flow,which is a process of air flow driving water flow through unsaturated soil.Then use numerical simulation including the two-phase flow analyzing and comparing the change process of pore water pressure,pore air pressure,the volumetric water content under One-dimensional soil rainfall infiltration.The results showed that High-pressure Infiltration Resistance method can reduce the water infiltration rate,and prevent water infiltration effectively.Finally,three points are put forward to improve the accuracy of numerical simulation of high-pressure infiltration resistance method.

关 键 词：降雨入渗 高压充气阻渗 水气二相流 数值模拟 滑坡 

分 类 号：U418.55[交通运输工程—道路与铁道工程]