盾构刀盘开口率对富水粉细砂层地表沉降的影响
白云飞1刘昊运2张志强1李五红1廖霖2
Effect of Metro Shield Cutter-head Aperture Rate on Ground Surface Subsidence of Water-rich Silty Fine Sand Layer
BAI YunfeiLIU HaoyunZHANG ZhiqiangLI WuhongLIAO Lin
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作者信息:1.中铁十二局集团第二工程有限公司, 030032， 太原；
2.太原理工大学矿业工程学院, 030024， 太原
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Affiliation:The 2nd Engineering Co.,Ltd., China Railway 12th Bureau Group, 030032,Taiyuan,China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.10.021
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中图分类号/CLCN:U456.3+1; U455.43
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栏目/Col:研究报告
摘要:
针对盾构机在富水粉细砂层中修建地铁引起的地表沉降问题，基于地表沉降理论，以太原地铁2号线某富水粉细砂层的盾构掘进区间段为研究对象，模拟不同开口率的刀盘对地表沉降的影响。结果表明，土压平衡式盾构机采用大开口率刀盘更适用于掘进富水粉细砂层，选用50%开口率的刀盘的土压平衡盾构机可成功将地表沉降控制在2 cm以内；推导出的经验公式适用于盾构机掘进富水粉细砂层的地表沉降计算；根据盾构实测出土量最终确定刀盘开口率为51%的盾构机更适合掘进太原地区富水粉细砂层。
Abstracts:
Aiming at the problems of surface settlement due to metro construction in water-rich silty sand layer by shield machine, and based on the theoretical analysis of surface subsidence, the shield tunneling section in water-rich fine sand layer on Taiyuan metro Line 2 is taken as the research object, the influences of different aperture rate of the cutterhead on the ground surface subsidence are simulated. The research shows that the cutter-head with large aperture rate adopted in earth pressure balanced (EPB) shield machine is more suitable for driving in the water-rich silty fine sand layer. When the EPB shield machine select the 50% aperture rate cutter-head in the construction, the ground surface settlement could be successfully controlled within 2 cm, and the empirical formula obtained could be used to calculate the ground surface settlement of shield tunneling in water-rich silty fine sand layer. According to the measured excavation volume of shield tunneling, the cutterhead with 51% aperture rate is proved to be more suitable for shield tunneling in the water-rich silty fine sand layer of Taiyuan City.
引文 / Ref:
白云飞，刘昊运，张志强，等.盾构刀盘开口率对富水粉细砂层地表沉降的影响[J].城市轨道交通研究，2021，24(10):108.
BAI Yunfei，LIU Haoyun，ZHANG Zhiqiang，et al.Effect of metro shield cutter-head aperture rate on ground surface subsidence of water-rich silty fine sand layer[J].Urban Mass Transit，2021，24(10)：108.
BAI Yunfei，LIU Haoyun，ZHANG Zhiqiang，et al.Effect of metro shield cutter-head aperture rate on ground surface subsidence of water-rich silty fine sand layer[J].Urban Mass Transit，2021，24(10)：108.
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