桥梁桩基采用全套筒全回转钻机施工对既有隧道的影响分析  

Analysis on the Influence of the Bridge Pile Foundation Construction with Full Sleeve Rotary Drilling Rig on the Existing Tunnel

作　　者：李亚奇 LI Yaqi(Changsha High-speed Railway Xicheng Construction Investment Co.,Ltd.,Changsha 410007,Hunan,China)

机构地区：[1]长沙高铁西城建设投资有限公司,湖南长沙410007

出　　处：《工程技术研究》2023年第12期223-225,共3页Engineering and Technological Research

摘　　要：文章以某新建市政桥梁邻近既有隧道桩基施工为例,为确保桥梁桩基施工中既有隧道的安全,从桩基施工工艺出发,建立三维数值模型,对传统桩基施工和全套筒全回转钻机施工进行了对比分析。结果表明:全套筒全回转钻机施工显著降低了既有隧道的变形,是一种有效的施工工艺。同时提出全套筒全回转钻机施工方案和既有隧道监测方案,为同类工程提供了可参考案例和指导。Taking the pile foundation construction of a newly built municipal bridge adjacent to the existing tunnel as an example,in order to ensure the safety of the existing tunnel in the construction of bridge pile foundation,a three-dimensional numerical model is established from the pile foundation construction technology to compare and analyze the traditional pile foundation construction and the full sleeve rotary drilling rig construction.The results show that the full sleeve rotary drilling rig construction significantly reduces the deformation of existing tunnel,and is an effective construction technology.At the same time,the full sleeve rotary drilling rig construction scheme and the existing tunnel monitoring scheme are put forward,which provides reference cases and guidance for similar engineering.

关 键 词：市政桥梁 桩基施工 既有隧道 全套筒全回转钻机 模拟分析 监测 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]