一种新老地下管线交叉节点施工方法  

A construction Method of New and Old Underground Pipeline Intersection Node

作　　者：万云华 郭胜娟 汤伟 WAN Yunhua;GUO Shengjuan;TANG Wei(Yunnan Design Institute Group Co.Ltd.,Kunming 650228;Yunnan Yunshui Construction Engineering Co.Ltd.,Kunming 650106)

机构地区：[1]云南省设计院集团有限公司,昆明650228 [2]云南云水建设工程有限公司,昆明650106

出　　处：《土工基础》2024年第2期192-194,203,共4页Soil Engineering and Foundation

摘　　要：近年随着城市更新,老旧小区和街道改造工作的开展,会遇到很多新问题。例如在管网铺设时,就常遇到新老地下管线交叉连接施工问题,由于有既有地下管线的存在,传统的沉井法施工没有可行性,此时常见的处理方法是在新老管线连接位置直接采取做基坑支护+明挖施工的方法处理,但有时由于地下管线数量、埋设深度和方向不明确,基坑围护结构施工有破坏既有地下管线的风险;另外在一些场地窄小的老旧小区里,施工机械无法进场或没有运转空间。为了解决类似问题,设计人员不得不寻求新的方法,结合工程实例介绍一种分段护壁成井法,希望对后续类似工程有所帮助。In recent years,with the development of the urban renewal as well as the renovation of old residential areas and blocks,many problems that are not occurred in the conventional new constructions have also been encountered during the development.For example,during the pipe network placement in the process of the renewal and reconstruction,the cross-connection construction of the new and existing underground pipelines is often encountered.Due to the existing underground pipeline,the traditional open caisson method is not feasible,Currently,the common treatment method is to directly adopt the method of deep excavation support plus the open cut and cover at the connection position of the new and the existing pipelines.However,sometimes,due to the unclear quantity,buried depth and direction of underground pipelines,the construction of supporting structure for the deep excavation may damage the existing underground pipelines.In addition,in some old residential areas with restricted construction space,the construction equipment cannot enter the site or there is no operating space.To solve similar problems,designers must seek new methods.This paper introduces a treatment method,which is called segmented slurry wall method,in combination with engineering examples.

关 键 词：分段护壁成井法 沉井 新老管线交叉 节点开挖 

分 类 号：TU473[建筑科学—结构工程]