复合式重力坝基坑支护结构的机理与参量分析  

FEM Analysis of a Composite Gravity Retaining Wall for Foundation Pit Supporting

作　　者：姚函 邵卫平 蔡伟铭[3] 刘尊景 杨敏[4,5] 

机构地区：[1]西北综合勘察设计研究院,西安710003 [2]浙江舜杰建筑集团股份有限公司,上海200060 [3]同济大学建筑设计研究院有限公司,上海200092 [4]同济大学岩土及地下工程教育部重点实验室,上海200092 [5]同济大学地下建筑与工程系,上海200092

出　　处：《结构工程师》2015年第6期137-143,共7页Structural Engineers

摘　　要：复合式重力坝基坑支护结构是介于重力式水泥土墙和排桩两种围护形式之间的一种复合支护形式。通过有限元模型,结合现场实测数据,分析了复合式重力坝支护结构的受力机理和变形特性,并进行了参数分析。研究表明复合式重力坝支护结构中除内插钻孔桩和水泥土自身抗弯性能承担一部分弯矩外,桩体受拉、坝体受压二者形成空间效应也能承担部分弯矩。相比排桩支护结构,复合式重力坝支护结构能更好地控制侧向变形。成果对复合式重力坝基坑支护结构的推广和应用具有较大的参考价值。Composite gravity retaining wall is a kind of excavation support structure between gravity retaining wall and piles retaining structure. In this paper, the mechanism and deformation characteristics of the composite gravity retaining wall are analyzed by a finite element model, with the comparison of field data. A parametric analysis was also carried out. Studies have shown that, the pile tension and soil cement compression form a space effect can also bear a part of the moment in a composite gravity wall, in addition to the flexural properties of interpolated bored piles and of soil cement. Compared with the retaining structure of row pile, composite gravity dam is better in the control of lateral deformation. The results of the paper have a reference value to the promotion and application of the composite gravity wall in an excavation proiect.

关 键 词：复合式重力坝 基坑支护 有限元分析 参量分析 

分 类 号：TV223[水利工程—水工结构工程]