长江漫滩地区地铁盾构端头土体加固及优化分析  

Soil Reinforcement and Optimization Analysis of Metro Shield End in Floodplain Area of Yangtze River

作　　者：陶云超 Tao Yunchao(Urban Rail Transit Engineering Company Limited of China Railway 15th Bureau,Luoyang,Henan 471002)

机构地区：[1]中铁十五局集团城市轨道交通工程有限公司,河南洛阳471002

出　　处：《工程技术研究》2022年第14期30-32,共3页Engineering and Technological Research

摘　　要：文章以南京地铁9号线绿博园站盾构端头加固工程为背景,结合所处漫滩地区地层特点,对不同加固方法进行适用性比选,提出了三轴搅拌桩+三重管高压旋喷桩+冷冻法及降水井辅助的施工加固方案,阐述了三轴搅拌桩的施工顺序、主要技术参数以及加固后地基土体的检测方法及效果,有效降低了端头地基加固风险,确保盾构施工工序的顺利开展。Taking the shield end reinforcement project at Lyuboyuan Station of Nanjing Metro Line 9 as the background,combined with the strata characteristics of the floodplain area, the applicability of different reinforcement methods is compared and selected in this paper, and the construction reinforcement scheme of three-axis mixing pile + triple-pipe high-pressure jet grouting pile + freezing method and dewatering well aid is proposed. The construction sequence and main technical parameters of three-axis mixing piles and the detection method and effect of foundation soil after reinforcement are expounded, which effectively reduces the risk of end foundation reinforcement and ensures the smooth development of shield construction process.

关 键 词：地铁车站 盾构隧道 端头加固 

分 类 号：U231.3[交通运输工程—道路与铁道工程]