摘要
本文以某县的水厂扩建工程为实例,深入分析了在复杂地质和水文条件下顶管施工技术的应用.文章详细阐述了顶管施工从沟槽放线、开挖到沉井预埋件设置、穿墙套管与法兰闷板安装、千斤顶配置、管道定向测量以及工具管穿墙出洞、止水、顶进工艺和管道、管件安装的全过程.特别强调了工具管设计针对不良土质的适应性,以及穿墙出洞和止水措施的重要性.实践表明,该顶管技术不仅适用于多种土质条件,还能在地下水变化较大的情况下保持开挖面稳定,为同类工程提供了有益参考.
Abstract
Taking the expansion project of a water plant in a county as an example,this paper deeply analyzes the application of pipe jacking construction technology under complex geological and hydrological conditions.The article elaborates on the whole process of pipe jacking construction from trench pay-off,excavation to caisson embedded parts setting,wall casing and flange stuffy plate installation,jack configuration,pipeline directional measurement,tool pipe through wall and hole,water stop,jacking process and pipeline and pipe fitting installation.Particular emphasis was placed on the adaptability of the tool tube design to poor soil textures,as well as the importance of penetrating holes in walls and stopping water.The practice shows that the pipe jacking technology is not only suitable for a variety of soil conditions,but also can maintain the stability of the excavation face under the condition of large changes in groundwater,which provides a useful reference for similar projects.
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