直立高边坡逆作法装配式锚索挡土墙施工技术

Construction technique of vertical high slope top-down method assembly type anchor retaining wall

在边坡工程中,直立高边坡的施工和围护是施工的一个难点,随着经济建设的发展,越来越多的地区出现高边坡施工。大连沿海城市商业经济培训中心及周边地块改造项目南侧挡土墙工程,是一个土质和强风化岩的直立高边坡工程,边坡最大深度为11.2m,部分段采用现浇钢筋混凝土挡土墙施工。开挖支护过程中出现过塌方事故,文章分析了事故出现的原因,并阐述具体处理措施,并以此具体工程为背景,提出一种新型逆作法装配式锚索挡土墙的施工技术方法,以不同种类的装配块间的组装作为挡土墙,并设置预应力锚索加固,采用逆作法自上向下逐步施工,底部挡土墙和地梁一起整体采用现浇钢筋混凝土,提高整体稳定。该方法减少工程风险,加快施工速度,为以后直立高边坡施工提供一种借鉴的方法。

In slope engineering,construction and building of vertical high slope is a difficult construction,along with the development of economy,more and more high slope construction area.Coastal city of Dalian Business Economics Training Center and surrounding land south of the retaining wall reconstruction project engineering,this project is an earth and strongly weathered rock vertical high slope,the slope of the maximum depth of 11.2 m,paragraph using situ reinforced concrete retaining wall construction.The process of excavation and support occurred one collapse accident,this article discusses the specific treatment measures,and with a specific project as an example,proposed the new construction technology top-down method assembly type anchor retaining wall,In the assembly of different kinds of block as a retaining wall,and set the pre-stressed reinforcement,the top-down construction gradually from top to bottom,bottom retaining wall and beam integrally using cast-in-place reinforced concrete,improve the overall stability.The method to reduce the project risk,accelerate the construction speed,to erect high slope construction provides a reference method.