考虑侧向变形的客运专线路基沉降特性研究  

Study of Subgrade Settlement Behavior of Passenger Dedicated Line Considering the Lateral Deformation Effects

作　　者：杨武[1] 曹文昭[2] 董佳竹[2] 

机构地区：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430052 [2]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《土木工程与管理学报》2012年第3期99-103,共5页Journal of Civil Engineering and Management

摘　　要：新建客运专线工程要求路基工后沉降不大于15 mm,现有规范因未考虑土体侧向变形对沉降的影响而往往低估最终沉降量。通过建立数值分析模型研究了客运专线路基在不同填土高度和泊松比时坡脚下侧向位移的变化规律及路基中最大侧向位移与中心点沉降的关系;引入考虑侧向变形的沉降修正系数,对其随填土高度和泊松比变化的规律进行了分析研究。New constructed passenger dedicated line demand that the post-construction settlement of the subgrade should be not more than 15 mm, and the current codes usually underestimate the ultima settlement for the sake of not taking lateral displacement effects into account. The lateral displacements of the toe with different fill heights and poisson＇ s ratios, and the relationships between maximum lateral displacements and settlements of central point of the passenger dedicated line, were investigated through conducting numerical simulations. The definition of correction coefficients of settlement was introduced and the relationships between the correction coefficients of settlement and fill heights/poisson＇ s ratios were analyzed.

关 键 词：侧向变形 路基沉降 填土高度 泊松比 沉降修正系数 

分 类 号：TU433[建筑科学—岩土工程] U213.157[建筑科学—土工工程]