柔性台背路基沉降的非线性计算与评价  

Nonlinear Evaluation on Mechanism of Flexible Abutment Reinforced by Geotextiles

作　　者：王初生[1] 叶为民[1] 王建军[2] 

机构地区：[1]同济大学地下建筑与工程系,上海市200092 [2]中交公路规划设计院,北京市100010

出　　处：《勘察科学技术》2005年第5期3-5,共3页Site Investigation Science and Technology

基　　金：广东省交通厅资助项目(030158)

摘　　要：为了研究桥台路基结构的数值模拟计算方法,该文在考虑土的固结和土体的非线性应力应变关系的基础上,利用非线性有限元数值方法对土工织物加筋柔性台背路基的受力性状和破坏机理进行了分析。分析结果表明,将铺有土工合成材料的桥台路堤,看作由土体、土工合成材料、土体-土工合成材料界面组成的、独立的平面应变三层连续体系,进行数值计算是行之有效的。计算显示,加筋可以明显使台背位移分布趋于均匀化,显著减轻由于台背密实度不足造成路堤的差异沉降。现场监测表明,该文采用的数值模拟方法与实际工程具有一致性。Considering the soil＇s consolidation and its nonlinear constitutive relation, the article analyzed the behavior and destruction mechanism of the flexible abutment reinforced by geotextiles by finite element method for comparative analysis. Three independent levels in reinforced soil were tried on its numerical evaluation of the flexible abutment; also the study showed that it was effective. The calculation indicated that the reinforcement could reduce its displacement as well as differential settlement, also improve the embankment＇s stability. Field monitoring approved that the nonlinear analysis was useful.

关 键 词：台背路基 差异沉降 非线性分析 现场监测 非线性计算 台背路基 路基沉降 柔性 土工合成材料 土工织物加筋 数值模拟方法 评价 应力应变关系 

分 类 号：U416.1[交通运输工程—道路与铁道工程]