锚拉悬臂式挡土墙模型受力特性数值模拟分析

Numerical Simulation Analysis on Mechanic Characteristics of Anchor Cantilever Retaining Wall Model

为通过模型试验研究车辆荷载作用下锚拉悬臂式挡土墙的受力特性,先使用ABAQUS有限元计算软件进行数值模拟,为模型试验的设计提供参数依据。研究结果表明:模拟车轮荷载作用下,锚杆轴力最大值出现在锚杆中间位置,向两端逐渐减小,近墙端轴力大于远墙端;挡土墙侧向土压力的竖向分布及横向分布都在锚固端位置出现急剧增大现象;锚杆高度位置、L/2截面处竖向土压力最大值出现在锚杆上方;挡土墙的侧向位移量在锚杆以下迅速减小,最大侧向位移出现在挡土墙顶端。该结论的得出为锚拉悬臂式挡土墙模型试验测量仪器的选取、参数比较及实际工程中锚拉悬臂式挡土墙的设计与施工提供了理论依据。

In order to study the mechanic characteristics of anchor cantilever retaining wall by model test, numerical simulation was conducted by ABAQUS to provide basis parameters for model test design. The results showed that the maximum axial force of the anchor appeared at the middle position and gradually reduced to both ends under wheel load. The axial force near the wall is larger than that the far from the wall. The vertical distribution and horizontal distribution of the lateral earth pressure of retaining wall Increased sharply at the anchor end position. The maximum vertical earth pressure at the height and L/2 of the anchor appeared over the anchor. The lateral displacement of the retaining wall decreased rapidly under the anchor and the maximum displacement appeared at the top of the retaining wall. This conclusion provided theoretical basis for selecting measuring instruments, parameter comparison of the model test, design and construction of anchor cantilever retaining wall.