隔离桩对软弱地层地铁暗挖隧道侧穿电塔的影响分析
段军朝1,2徐朝阳2何凯罡2
Influence of Isolation Pile on Metro Mined Tunnel Side-passing Pylon in Soft Stratum
DUAN JunchaoXU ZhaoyangHE Kaigang
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作者信息:1.1.中建三局基础设施建设投资有限公司,430064,武汉；
2.2.中建三局集团有限公司,430064,武汉
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Affiliation:China Construction Third Engineering Bureau Infrastructure Construction Investment Co., Ltd., 430064, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.01.013
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中图分类号/CLCN:U455.49
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栏目/Col:研究报告
摘要:
为研究钢管隔离桩加固对软弱地层中地铁暗挖隧道侧穿电塔的影响，以成都地铁6号线三期工程某矿山法区间隧道侧穿电塔为例，采用FLAC3D有限差分软件动态模拟软弱地层矿山法隧道侧穿电塔施工，从地面位移、电塔基础竖向位移与倾斜、电塔结构内力等方面分析隔离桩加固的影响，并结合现场实测数据评价其加固效果。研究结果表明，采用钢管隔离桩加固可显著降低地面位移、电塔基础竖向位移与电塔结构内力。
Abstracts:
To study the influence of steel pipe isolation pile on metro underground-excavated tunnel side-passing pylon in soft stratum, Chengdu Metro Line 3 Phase Ⅲ engineering of mined interval tunnel side-passing pylon is taken as example, FLAC3D finite difference software is adopted to dynamically simulate the construction of mined tunnel in soft stratum. From aspects including ground surface subsidence, pylon foundation vertical displacement and inclination, pylon structure internal force, the influence of isolation pile reinforcement is analyzed, and the reinforcement effect is evaluated with field measured data. Research results show that the steel pipe isolation pile can significantly reduce the surface subsidence, pylon foundation vertical displacement and pylon structure internal force.
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