某铁路立交桥引道挡墙变形原因分析

Railway Overpass Road Retaining Wall Deformation Analysis

流砂是高地下水位饱和粉细砂地区经常遇到的一类地质环境灾害问题。结合某铁路立交桥引道挡墙变形破坏工程实例,从变形特征、变形发展历史、场地水文地质工程地质条件、排水设施施工质量等各方面详细分析挡墙变形破坏的机理及其过程,可以发现,流砂渗透变形是该引道挡墙地基基础变形的主要原因,根据分析提出处理方案,具有很强的针对性。

Flow of sand is a class of geo-environmental disaster often encountered in areas where is a high Groundwater level saturated fine sand. A railway overpass under road retaining wall defor-mation and damage project example is discussed. It discusses the deformation features,the history of the deformation development,site conditions of hydrogeology and engineering geology and the quality of drainage facilities to analyze the wall deformation and damage mechanism and process emphasis. On the basis it arrives at the conclusion that quicksand is the basic foundation reason of the road retaining wall deformation,and proposes treatment project towards this condition.