拱形挡土墙模型试验及有限元分析

Model Test and Finite Element Analysis of Arched Retaining Wall

拱形挡土墙安全可靠,节省工程造价,能与周围环境相协调,在重庆地区得到了越来越多的应用,但现阶段暂无有关拱形挡土墙的设计和施工的现行规范可循。进行了相关的模型试验,并进行相应的数值模拟分析,得到拱形挡土墙的变形和受力特征。试验数据以及数值计算表明:相较于其他形式的挡土墙,拱形挡土墙结构更具有对称性,能较好的利用拱效应,将墙面荷载传递至拱脚,从而充分利用侧壁支持力以及摩擦力来平衡挡土墙所受填土侧压力;拱形挡土墙质量更轻,能承受更大荷载作用,荷质比最大,墙身变形量最小,能够更多的运用在重庆及川东地区等多为粘性土,并且建筑弃土也多为易风化为黏性泥土的泥岩块地区。

Arched retaining wall is safe and reliable and can save the project cost as well as be in harmony with the surrounding environment, which makes it be more and more used in chongqing region. But there is no available code to be abided by in design and construction of arched retaining wall. The relevant model test and numerical analysis is performed to gain the deformation and stress characteristics of arched retaining wall. Test data and the numerical calculation shows us compared with other forms of retaining wall,the arched retaining wall is more sym-metry and arch effect can be better used to metope load transfer to the arch foot, so as to make full use of the side wall support and frictional force to balance the lateral pressure; Arched retaining wall is lighter and it can bear greater load, its charge-mass ratio is the largest, deformation of the wall is minimum;Arched retaining wall is going to be more use in chongqing, as well as in east sichuan region which is made of cohesive soil, and easy construction and soil weathering of mudstone area of the cohesive soil.