地铁工程中沙漏型岩溶注浆技术研究  

作　　者：谭云龙 

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《科技创新与应用》2023年第35期165-168,共4页Technology Innovation and Application

摘　　要：为促进地铁工程的顺利施工,增强工程建设效益,该文以北京地铁M17号线为例进行分析,介绍该工程施工的基本信息,分析当前施工管理现状与问题。为有效解决问题,研究北京地铁M17号线工程中,沙漏型岩溶注浆技术的运用情况,车站主体结构底板埋深约为17 m,地基承载力标准值180~220 kPa,基底抽条加固施作格构式土墩柱支撑在岩面上,采用钻孔灌注桩+内支撑支护方案,进行钻杆基岩成孔,保证全孔一次注浆,灌浆达到终浆标准。结果显示,沙漏型岩溶注浆技术的运用对促进工程顺利施工起到重要的支持作用。In order to promote the smooth construction of the subway project and enhance the construction efficiency of the project,this paper takes Beijing Subway Line M17 as an example,introduces the basic information of the project construction,and analyzes the current situation and problems of construction management.In order to solve the problem effectively,the application of hourglass karst grouting technology in Beijing Subway Line M17 is studied.The buried depth of the bottom plate of the main structure of this station is about 17 m,the standard value of foundation bearing capacity 180~220 kPa,the foundation strip reinforcement and lattice soil pier column support on the rock surface,the drilled cast-in-place pile+internal support support scheme is adopted to form holes in the drill pipe bedrock to ensure that the whole hole is injected once and the grouting reaches the final grouting standard.The results show that the application of hourglass karst grouting technology plays an important role in promoting the smooth construction of the project.

关 键 词：地铁工程 岩溶注浆技术 地基承载力 PP-R管施工 岩土工程问题 

分 类 号：U231.3[交通运输工程—道路与铁道工程]