越江盾构切削江堤抗滑桩影响及MJS加固效果分析  

Numerical Simulation Study of MJS Column Reinforcement in River Embankment with Shield Cutting Piles

作　　者：王大鹏 蒙邹蕾 王翀霄 孙宇[3] 姚森[4] 孙阳[2,5] WANG Dapeng;MENG Zoulei;WANG Chongxiao;SUN Yu;YAO Sen;SUN Yang(Nanjing Metro Construction Co.,Ltd.,Nanjing 210008,China;College of Harbor,Costal and Off-shore Engineering,Hohai Univ.,Nanjing 210098,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;China Railway Major Bridge Engineering Group Co.,Ltd.,Wuhan 430000,China;Institute of Ocean and Offshore Engineering,Hohai Univ.,Nantong 223003,China)

机构地区：[1]南京地铁建设有限责任公司,南京210008 [2]河海大学港口海岸与近海工程学院,南京210098 [3]南京水利科学研究院,南京210029 [4]中铁大桥局集团有限公司,武汉430000 [5]南通河海大学海洋与近海工程研究院,江苏南通223003

出　　处：《三峡大学学报（自然科学版）》2023年第4期67-73,共7页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金(41672257);南通市科技计划项目(JC2021009)。

摘　　要：为研究盾构穿越江堤并切削抗滑桩对江堤稳定性及周围土体变形的影响,并探究MJS工法在此类工程中的应用效果,以南京建宁西路大直径盾构切削江堤抗滑桩工程为背景,采用三维有限元数值模型,分析了在有无MJS工法加固两种情况下两台盾构机并行穿越江堤全过程中的江堤和抗滑桩变形规律.研究表明:盾构穿越江堤过程中,堤顶土体受扰动最严重;MJS加固能有效分担滑坡推力、控制土体与抗滑桩的变形.In order to analyze the influence of shield tunneling crossing the embankment and cutting anti-slip piles on the stability of the embankment and the deformation of the surrounding soil,the application effect of the MJS method in such projects was studied.Based on the large-diameter shield tunneling and cutting antisliding pile project on Jianning West Road,Nanjing,a three-dimensional finite element numerical simulation was used to analyze the deformation characteristics of the embankment and anti-sliding pile during the parallel tunneling of two shield machines across the embankment with and without the MJS method.The research results show that the topsoil of the embankment is subjected to the most severe disturbance during the process of shield tunnel crossing the river embankment.The MJS reinforcement can effectively share the thrust of landslides and control the deformation of soil and anti-slide piles.

关 键 词：MJS 盾构隧道 数值模拟 土体位移 切削桩基 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]