大型沉井在深厚软土及复杂环境下的应用研究

文章以珠海市斗门区井岸城区生活污水处理厂提标扩容工程勘察设计项目中的高效沉淀池大型沉井为研究对象。在沉井预制到下沉整个施工过程中,通过对场地内深厚软土进行加固处理,提高软土的地基承载力,对周边现状建(构)筑物布置监测点,并建立基坑监测和预警系统,以确保沉井安全稳定的下沉至设计标高。文章通过总结此次的成功经验,以供今后类似工程借鉴。

This paper takes the large caisson of the high efficiency sedimentation tank in the survey and design project of the bid raising and expansion project of the domestic sewage treatment plant in Doumen District,Zhuhai City as the research object.In the whole construction process from caisson prefabrication to sinking,the deep soft soil in the site is strengthened to improve the foundation bearing capacity of the soft soil,the monitoring points are arranged for the surrounding structures,and the foundation pit monitoring and early warning system is established to ensure the safe and stable sinking of the caisson to the design elevation.This paper summarizes the successful experience of this time,which can be used as a reference for similar projects in the future.