路堤土降雨入渗响应的模型试验研究  

Experimental Study on the Response of Road Embankment to Rainfall Infiltration

作　　者：李聪[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第3期550-553,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：交通部西部交通建设科技项目资助(批准号:200531874010)

摘　　要：采用重庆环城高速公路建设用土,在降雨条件下进行了压实度不同的两组路堤室内模型试验,分析了不同加载降雨过程路堤土压力、变形、基质吸力的变化规律,总结出降雨对路堤的影响位置、深度和时效性等.通过试验观测发现:⑴突然降雨或长期的暴雨对路堤土压力和变形有显著影响;⑵路堤中部对降雨的响应有一定的滞后性;⑶降雨对路堤的影响深度与填土的类型和粒径有关;⑷压实度越大,膨胀土的膨胀越明显,而路堤中吸力与含水量受降雨的影响越小.The filled soils coming from freeway around city in Chongqing were used to simulate two road embankments with different compactness in lab,which is under the condition of rain infiltration.The variation laws of earth pressure,deformation and matrix suction in embankment under different loading and rain process are analyzed,in order to find the effect of rainfall on road embankment.It is obtained that：（1） Sudden rain or long-term rainstorm had significant influence on earth pressure and deformation of road embankment;（2） The response of the center section of roadbed had a delay to rainfall;（3） Influence depth by rainfall are related to fill＇s type and size;（4） The larger the compactness,the more obviously expansive soil expands,and the less the influence on matrix suction and water content by rainfall.

关 键 词：路堤 降雨 试验 土压力 变形 基质吸力 

分 类 号：U416.1[交通运输工程—道路与铁道工程]