超大直径泥水平衡盾构隧道下穿城区商业体沉降控制  

Settlement Control of Oversized Diameter Mud-Water Balance Shield Tunneling Underpassing through Urban Commercial Complex

作　　者：孙长松 赖谋 陈建 彭小雨 肖明清[3] SUN Changsong;LAI Mou;CHEN Jian;PENG Xiaoyu;XIAO Mingqing(China Railway 14th Bureau Group Shield Engineering Co.,Ltd.,Nanjing 250032,China;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China;China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁十四局集团大盾构工程有限公司,南京250032 [2]西南交通大学交通隧道工程教育部重点实验室,成都610031 [3]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《路基工程》2024年第6期180-184,共5页Subgrade Engineering

摘　　要：以北京东六环改造工程超大直径泥水平衡盾构段下穿欢乐宋商业体为背景,建立隧道下穿过程数值模型,探究在不同的掌子面泥水压力、注浆压力、深孔注浆地层加固措施下建筑基础的沉降规律。深孔注浆措施对大体积建筑沉降控制效果显著,掌子面泥水压力与注浆压力对沉降控制的效果相比深孔注浆较小,建议软弱地层下穿既有建筑采用深孔注浆加固,辅之适应地层深度与地层物理性质的掘进参数。Taking the oversized diameter mud-water balance shield tunneling underpassing through Joyful Song Commercial Complex of Beijing East Sixth Ring Road Renovation project as the background,a numerical model of the tunnel underpassing process was established to explore the settlement patterns of building foundations under different face slurry pressures,grouting pressures,and deep hole grouting ground reinforcement measures.The deep hole grouting measure has a significant effect on controlling the settlement of large-volume buildings.Compared to deep hole grouting,face slurry pressure and grouting pressure have less impact on settlement control.It is recommended to use deep hole grouting reinforcement for weak strata underpasses existing buildings,supplemented by tunneling parameters that adapt to stratum depth and physical properties.

关 键 词：超大直径 盾构下穿 地层加固 深孔注浆 掘进控制 沉降监测 安全性 

分 类 号：U455[建筑科学—桥梁与隧道工程]