金高路桥主墩深基坑围护施工技术

Jingao Road Bridge Main Pier Deep Pit Enclosing Construction Technology

该文介绍了金高路桥主墩深基坑围护施工技术。该桥主跨65 m段跨越赵家沟航道。根据该桥主墩深基坑周边环境复杂等特点,采用拉森IV型钢板桩作为围护结构,设置三道水平钢支撑和一道混凝土水平底板支撑,基坑底土体采用D800 m m旋喷桩加固,基坑外5m范围内土体采用插打钢管注浆加固,同时进行实时有效的基坑监测,很好地保证了主墩基坑施工的安全、质量和进度要求。

The article introduces the main span 65-m section of Jingao Road Bridge crossing Zhaojiagou Channel.Based on the characteristics of complicated surrounding environment of the main pier deep pit of this bridge,the Larsen IV-type steel sheet pile is used for the enclosing structure,and three horizontal steel supports and a concrete horizontal bedplate support are set up.The soil of the pit bed is reinforced by D800-mm jet grouting pile,the soil within the 5-m range outside of pit is reinforced by steel pipe pouring,and also the pit is effectively real-time monitored so as to better guarantee the security,quality and schedule requirements of pit construction for the main pier.