隧道开挖对周边建筑的沉降影响分析  

Analysis of the Settlement Impact of Tunnel Excavation on Surrounding Buildings

作　　者：杜军锋 冯毅 刘晓伟[3] DU Junfeng;FENG Yi;LIU Xiaowei(Jiuye Construction Co.,Ltd.,Xianyang 712000,China;Shaanxi Yongxin Mining Limited Liability Com-pany,Yulin 719000,China;School of Data Science and Engineering,Xi'an Innovation College of Yan'an University,Xi'an 710000,China)

机构地区：[1]九冶建设有限公司,陕西咸阳712000 [2]陕西涌鑫矿业有限责任公司,陕西榆林719000 [3]延安大学西安创新学院数据科学与工程学院,陕西西安710000

出　　处：《河南科技》2024年第20期72-77,共6页Henan Science and Technology

基　　金：延安大学西安创新学院校级科研项目(2022XJKY-9)。

摘　　要：【目的】陕西某隧道在建筑密集区进行施工时,为了确保隧道施工的安全进行,保障周边建筑结构的稳定性,需要对隧道开挖支护内力及对周边建筑的沉降影响进行分析。【方法】采用隔离桩+花管桩+加强初期支护的施工方案,建立数值模型,对隧道开挖过程进行模拟分析。模拟时充分考虑地质条件、建筑分布、隧道结构等因素,以确保模拟结果的准确性和可靠性。【结果】数值模拟结果表明,采用隔离桩+花管桩+加强初期支护的施工方案,能够有效控制隧道开挖过程中拱脚部位的应力集中现象,确保隧道支护结构的安全。同时,该方案对周边建筑的倾斜沉降影响较小,满足规范要求。【结论】本研究证明了在隧道施工中,采用隔离桩+花管桩+加强初期支护的施工方案是可行的,能够有效降低隧道开挖对周边建筑的影响。研究结果对于类似工程具有一定的参考价值,对于保障隧道施工安全及周边建筑稳定性具有重要意义。[Purposes]To ensure the safe construction of a tunnel in a densely built-up area in Shaanxi Province and safeguard the stability of surrounding building structures,it is necessary to analyze the in-ternal force of tunnel excavation support and the settlement impact on the surrounding buildings.[Meth-ods]This paper adopts a construction scheme combining isolation piles,flower pipe piles,and reinforced early support,and establishes a numerical model to simulate and analyze the tunnel excavation process.During the simulation,geological conditions,building distribution,tunnel structure,and other factors are fully considered to ensure the accuracy and reliability of the simulation results.[Findings]The numeri-cal simulation results show that the construction scheme combining isolation piles,flower pipe piles,and reinforced early support can effectively control the stress concentration phenomenon at the arch foot dur-ing tunnel excavation,thereby ensuring the safety of the tunnel support structure.Meanwhile,this scheme has a minor impact on the tilt and settlement of surrounding buildings,meeting the regulatory re-quirements.[Conclusions]This study proves that the construction scheme combining isolation piles,flower pipe piles,and reinforced early support is feasible in tunnel construction,effectively reducing the impact of tunnel excavation on surrounding buildings.The research results have certain reference value for similar projects and are of great significance in ensuring the safety of tunnel construction and the sta-bility of surrounding buildings.

关 键 词：隧道开挖 周边建筑 隔离桩 花管桩 支护 

分 类 号：U455[建筑科学—桥梁与隧道工程]