全方位高压喷射工法在杭州地铁盾构下穿既有线工程中的应用
蒋力1李强2
Application of Metro Jet System in Hangzhou Metro Shield Tunnel Under-passing Existing Line Project
JIANG LiLI Qiang
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作者信息:1.1.北京城建设计发展集团股份有限公司， 100071， 北京；
2.2.杭州市地铁集团有限责任公司， 310003， 杭州
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Affiliation:Beijing Urban Construction Design and Research Group Co., Ltd., 100071, Beijing
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.08.040
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中图分类号/CLCN:U455.48+2
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栏目/Col:施工技术
摘要:
以杭州地铁5号线滨康路站—青年路站区间盾构隧道近距离下穿既有地铁1号线工程为背景，对全方位高压喷射工法在盾构下穿既有线工程中的应用进行研究。通过分析现场试桩试验数据和实际施工过程监测数据，总结了采用全方位高压喷射加固后既有隧道的变形规律，并提出适用于杭州地区软土地层的施工参数及施工工序。研究结果表明：既有隧道的全方位高压喷射加固建议选择“半圆”加固方式；应合理延长相邻桩的施工间隔时间，优化施工工序；采用全方位高压喷射加固后，既有隧道结构变形得到了有效控制。
Abstracts:
Taking the project of interval shield tunnel of Hangzhou Metro Line 5 Binkang Road station to Qingnian Road station under-passing existing Metro Line 1 at close distance as research background, the application of MJS (metro jet system) in shield tunnel under-passing existing line is studied. Through analyzing field pile test data and monitoring data of actual construction process, the deformation pattern of the existing tunnel after being reinforced with MJS is summarized, and the construction parameters and procedures suitable for Hangzhou soft soil stratum are put forward. Research results show that: ‘semicircle’ reinforcement method is suggested for reinforcing existing tunnel with MJS; construction interval of adjacent piles should be reasonably extended, and the construction process to be optimized; with MJS reinforcement, structural deformation of the existing tunnel is effectively controlled.
引文 / Ref:
蒋力，李强.全方位高压喷射工法在杭州地铁盾构下穿既有线工程中的应用[J].城市轨道交通研究，2021，24(8):192.
JIANG Li，LI Qiang.Application of metro jet system in Hangzhou metro shield tunnel under-passing existing line project[J].Urban Mass Transit，2021，24(8)：192.
JIANG Li，LI Qiang.Application of metro jet system in Hangzhou metro shield tunnel under-passing existing line project[J].Urban Mass Transit，2021，24(8)：192.
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