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首页> 外文会议>World Landslide Forum 3, Volume 4: Discussion Session >Deformation Behavior of Mechanically Stabilized Earth Walls with Geocomposite Drainage under Seepage Condition
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Deformation Behavior of Mechanically Stabilized Earth Walls with Geocomposite Drainage under Seepage Condition

机译：渗流条件下带土工排水的机械稳定土墙的变形行为

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摘要

Both external and internal stabilities are a main concern in design and construction manuals for the mechanically stabilized earth (MSE) wall.Literature showed that the failure of the MSE walls, especially in mountainous areas, is mainly caused by the attack of seasonal heavy rainfall.The seepage through the MSE wall due to the rainfall causes the increase in the lateral stress and the reduction in the effective stress, stiffness and strength of the backfill;hence the reduction in the factors of safety against external and internal failure.This paper investigates the flow and mechanical behaviors of the MSE wall with and without geocomposite grain under seepage condition.The investigation is performed using laboratory physical model tests.It is found that the water pressure significantly controls the performance and the failure of the MSE wall.As the water pressure increases, the settlements in the unreinforced zone increase.The failure of the MSE wall is caused by the piping of the reinforced soil.The geocomposite drainage reduces the water pressure and water content in the reinforced zone, hence the improvement of the stability of the MSE wall.For the same water pressure, the MSE wall with geocomposite drainage sustains lower settlements.
机译：外部和内部稳定性都是机械稳定土墙（MSE）墙的设计和施工手册中的主要关注点。文献表明，MSE墙（尤其是在山区）的失效主要是由于季节性强降雨的侵袭所致。由于降雨而导致MSE壁的渗漏导致侧向应力增加以及回填的有效应力，刚度和强度降低;因此降低了应对内部和外部破坏的安全性因素。渗流条件下带或不带土工复合材料的MSE墙的流动和力学行为。通过实验室物理模型测试进行了研究，发现水压显着控制了MSE墙的性能和破坏。 MSE墙的破坏是由钢筋的管道引起的。土工复合材料的排水降低了加固区内的水压和含水量，从而改善了MSE墙的稳定性。在相同的水压下，土工复合排水的MSE墙保持较低的沉降。

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