扶壁式加筋复合挡墙变形规律和受力机理

The Deformation Law and Stress Mechanism of Wrapped reinforced and Counterfort Combined Retaining Wall

摘要:

采用离心机模型试验和FLAC3D数值模拟相结合的方法，研究上海某高填土工程中扶壁式挡墙与包裹式土工格栅组合的复合挡墙变形规律和受力机理.离心机模型试验结果表明，复合挡墙的水平位移较小，能较好地控制高填土水平位移.在离心机模型试验的基础上，采用FLAC3D计算了复合挡墙的水平土压力，并与同尺寸和参数条件下的纯加筋挡墙、纯扶壁式挡墙的水平位移和水平土压力进行对比分析，结果表明，复合挡墙中扶壁式挡墙能有效地控制水平位移，包裹式土工格栅分担大部分水平土压力.该研究为高填土复合挡墙工程设计提供了理论依据.

Abstract:

Apply centrifuge model test and FLAC3D simulation to understand high filled project of Shanghai about the deformation law and stress mechanism of combined retaining wall that wrapped reinforced retaining wall combined with counterfort retaining wall. Centrifuge model test’s results show that the horizontal displacement of combined retaining wall is smaller, and that combined retaining wall can better control the horizontal displacement of high filling. Based on centrifuge model test, FLAC3D was used to simulate the horizontal earth pressure of combined retaining wall, and compare horizontal displacement and horizontal earth pressure with wrapped reinforced retaining wall and counterfort retaining wall with the same condition, simulation results show that counterfort retaining wall can control horizontal displacement efficiently and wapped reinforced retaining wall shares most of horizontal earth pressure. Based on the results of test and simulation, some suggestions and references are provided for the design of combined retaining wall of high filled project.