市政技术2024，Vol.42Issue(12)：223-229,7.DOI:10.19922/j.1009-7767.2024.12.223
软土地层盾构隧道近距离下穿既有线风险控制措施研究
Research on Risk Control for Shield Tunnels Undercrossing the Adjacent Existing Lines in Soft Soil Strata
摘要
Abstract
In order to study the risk control measures for shield tunnels passing through the adjacent existing lines in soft soil layers,the spatial relationship and engineering difficulties between newly built shield tunnels and the exist-ing operating tunnels were analyzed,as well as the overall protection plan of the existing operating tunnels.A com-prehensive risk control measure was proposed,which includes reinforcement of the existing operating tunnels+re-inforcement of interlayer soil between the existing operating tunnels and newly built shield tunnels+reinforcement of the newly built shield tunnels+automatic monitoring of the existing operating tunnels.A 3D numerical calcula-tion model was established to analyze the deformation and internal force characteristics of the existing operating tun-nels under the most unfavorable working conditions.The analysis results show that both the deformation and internal forces meet the requirements after adopting comprehensive risk control measures,which verified the reliability of the risk control measures.The research conclusions can provide reference for similar engineering design and con-struction.关键词
盾构隧道/软土地层/近距离下穿/风险控制/克泥效Key words
shield tunnel/soft soil strata/closely undercrossing/risk management/clay shock method分类
交通工程引用本文复制引用
张恒文,李晓霖,史跃峰,周云强..软土地层盾构隧道近距离下穿既有线风险控制措施研究[J].市政技术,2024,42(12):223-229,7.基金项目
中国城市轨道交通协会重大科研专项(CAMET-KY-2022007) （CAMET-KY-2022007）
中车重大科研专项(2022CCA045) （2022CCA045）
