自嵌块加筋挡土墙失稳原因分析

Cause Analysis of Reinforced Earth Self-Retaining Wall Failure

以某自嵌块加筋挡土墙工程为例,对其失稳的原因进行分析。通过对工程现场失稳墙体范围、地质条件等调查,墙后填土、加筋材料、墙体砌筑等工程质量检测,以及室内试验等测试手段,查明该工程自嵌块加筋挡土墙工程状态。采用不同工况下的理论计算分析,发现墙体失稳的主要原因为:生态自嵌块干垒挡土墙自嵌块自重轻、孔洞率高,墙体砌体自重应力小,单向土工格栅与砌块接触面积小,自嵌块墙体抵抗水平力能力低等自身缺陷;墙顶超载和降雨入渗等外部因素。该分析成果为下阶段挡土墙加固设计提供了参考依据。

A case study is carried out based on a failed self-embedded reinforced retaining wall, the reasons of failure have been analyzed. By the scene investigation, survey of the engineering geological conditions, quality examination and laboratory test, the general situation of the project is got. And through theoretical calculation, the conclusions are obtained. The light geostatic stress of retaining wall, the small contact area between geogrid and retaining wall, and the insufficient shear strength of retaining wall are the main inherent factors result in the fail of Self-embedded Reinforced Retaining Wall. The overload and rainfall infiltration are the main external factors which could cause failure Self-embedded Reinforced Retaining Wall. Such a study provides references for reinforcement of Self-embedded Reinforced Retaining Wall.