黄土高路堤沉降变形规律研究  

STUDY ON SETTLEMENT AND DEFORMATION LAWS OF HIGH LOESS-FILL EMBANKMENT

作　　者：景宏君[1] 胡长顺[2] 王秉纲[2] 

机构地区：[1]西安交通大学建筑工程与力学学院 [2]长安大学公路学院,陕西西安710064

出　　处：《岩石力学与工程学报》2005年第A02期5845-5850,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：以109国道兰州—海石湾高速公路高69 m黄土路堤为研究载体,采用离心模型试验,研究黄土高路堤沉降沿其高度、路线纵向和横断面方向的分布规律,并与实测结果进行对比分析。研究结果表明:对于高路堤沉降而言,其垂直向最大值发生在路堤顶面,水平最大值发生在路堤下部约3/4部分;位移在路堤坡脚处和路肩处最小,位移大小自路堤顶到路堤底呈减小趋势,路堤变形趋势在上部呈向内、向下移动趋势,即呈现“凹盆”,在1/3～2/3路堤高处呈向外“挤出”趋势。建议在进行高路堤设计和施工时,应重视沉降变形趋势明显的地段,以保证高路堤的安全稳定性。The study takes 69 m high loess-fill embankment of Lanzhou--Haishiwan expressway of 109th national highway as a case. Through centrifuge test, the distribution laws among high, route-longitudinal section, and transverse section with high loess-fill embankment are presented, and the theoretical results are compared with the actual measurement results. The derived results show that the subgrade settlement-deformation appears＂ sag＂, i. e., maximal settlement lies in center road and shoulder settlement is minimum; and in the place 1/3- 2/3 of embankment height, the tendency shows outward ＂extrusion＂ . Embankment deformation change tendency is increasing inward and downward, and it suggests that it should be paid attention to the remarkable change of settlement deformation for high embankment in design and construction to guarantee the safety and stability.

关 键 词：道路工程 黄土高路堤 沉降变形 离心模型试验 规律研究 

分 类 号：TU444[建筑科学—岩土工程] U416.169[建筑科学—土工工程]