岩土工程学报Issue(4)：675-682,8.DOI:10.11779/CJGE201504013
不同位移模式下衡重式路肩墙离心模型试验研究
Centrifugal model tests on shoulder balance weight retaining wall with various motion modes
摘要
Abstract
Using the new shoulder balance weight retaining wall of an old embankment widening project of a mountainous highway as the prototype, four groups of geotechnical centrifugal model tests are designed based on the wall motions under translation (T), rotating around base (RB), rotation around top (RT) and T+RB modes, the impact of wall motion modes on earth pressure and deformation of the filling is discussed, and the process of soils at various depths entering in to the active earth pressure is analyzed. The results show that: (1) The wall motion modes almost have no influence on the values and distribution of earth pressure on the upper wall, but when the ratio of displacement to height of retaining wall is less than 0.3%~0.5%, the shallow layer fills behind the upper wall have soil arching effect which is caused by wall-soil friction, and the coefficient of horizontal earth pressure increases; (2) The equilibrator has a shadowing effect on the down wall earth pressure, and the influence area is about 1/3 height of the down wall below the equilibrator. The results reduce the position of the acting point of earth pressure resultant force; (3) The motion modes have obvious impact on the fill settlement. When the maximum wall displacements are the same, the fill settlement of the T mode is significantly larger than that of the RB and RT modes. Under the RT mode, although it has the same displacement area as the RT mode, the equilibrator deflects downward. The fill settlement is promoted, leading to that the fill settlement of the RT mode is larger than that of RB mode, and the second fracture surface occurs easier on the upper wall.关键词
衡重式路肩墙/土工离心模型试验/位移模式/土压力/路基沉降/土拱效应Key words
shoulder balance weight retaining wall/centrifugal model test/motion mode/earth pressure/fill settlement/soil arching effect分类
建筑与水利引用本文复制引用
李浩,罗强,张良,蒋良潍,张家国..不同位移模式下衡重式路肩墙离心模型试验研究[J].岩土工程学报,2015,(4):675-682,8.基金项目
973计划课题（2013CB036204）；中央高校基本科研业务费专项资金项目 （）
