用非线性模型评价加筋柔性台背路堤  

NONLINEAR MODEL EVALUATION OF FAILURE MECHANISM OF A FLEXIBLE ABUTMENT REINFORCED BY GEOTEXTILES

作　　者：王初生[1] 王正哲[2] 陈宝[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]中国水利水电科学研究院,北京100044

出　　处：《工程地质学报》2005年第4期521-524,共4页Journal of Engineering Geology

基　　金：广东省交通厅资助项目030158

摘　　要：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堤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。计算结果显示,土工织物加筋可以有效减少桥台路堤50%的均匀沉降和66%的非均匀沉降,并能增加台背路堤的稳定性。现场监测表明,本文采用的数值模拟方法与实际工程具有一致性。This paper analyzed mechanical behavior and failure mechanism of a flexible abutment reinforced by geotextiles by using finite element method in consideration of consolidation and non - linear constitutive relation of soil. The reinforced soil was simulated as a three - layer material consisting of soil, geotextile, and interface between them. The results indicated that the reinforcement could reduce its uniform settlement by 50% and differential settlement by 66%. It, could also improve the embankment＇s stability.

关 键 词：柔性台背 路堤 不均匀沉降 非线性分析 

分 类 号：U416.12[交通运输工程—道路与铁道工程]