富水砂层地下水位变化对盾构隧道衬砌结构的影响分析
曹鹏飞1袁宗义2陈昭阳3邱友根1陈祥胜3石钰锋1,3
Analysis of the Influence of Groundwater Level Change Rate in Water-Rich Sand Layer on Shield Tunnel Structure
CAO PengfeiYUAN ZongyiCHEN ZhaoyangQIU YougenCHEN XiangshengSHI Yufeng
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作者信息:1.南昌轨道交通集团有限公司，330038，南昌
2.中交第四航务工程勘察设计院有限公司，510290，广州
3.华东交通大学轨道交通基础设施性能监测与保障国家重点实验室，330013，南昌
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Affiliation:Nanchang Urban Rail Group Co., Ltd., 330038, Nanchang, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.01.026
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中图分类号/CLCN:U45
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栏目/Col:研究报告
摘要:
利用Plaxis软件建立有限元模型，分析富水砂层地下水位升降速率对区间盾构隧道衬砌内力的影响。结合南昌地下水位升降规律拟定若干工况，通过将模拟结果与监测数据进行对比分析，验证了模型的正确性，并对各工况下隧道衬砌结构内力进行对比分析。研究结果表明：地下水位上升则衬砌弯矩减小，地下水位下降则衬砌弯矩增大；地下水位升降速率不同对衬砌结构的弯矩影响不同，当水位升降速率大于0.33 m/d 时，速率越大对衬砌弯矩影响越大，且下降过程对衬砌弯矩影响大于上升过程。
Abstracts:
Plaxis software is adopted to establish a finite element model to analyze the influence of water level rise and fall rate on the internal force of interval shield tunnel lining. Considering the groundwater level rise and fall law in Nanchang, several working conditions are drawn. By comparing the simulation results with the monitoring data, the correctness of the model is verified, and the internal force of tunnel lining structure under each working condition is compared and analyzed. The results show that: when the water level rises, the lining bending moment decreases; when the water level falls, the lining bending moment increases; various groundwater level rise and fall rates have distinguishing influence on lining structure bending moment. When the water level rise and fall rate is greater than 0.33 m/d, the greater the rate is, the greater influence on the lining bending moment is, and the effect of the falling process is greater than that of the rising process on the lining bending moment.
引文 / Ref:
曹鹏飞,袁宗义,陈昭阳,等.富水砂层地下水位变化对盾构隧道衬砌结构的影响分析[J].城市轨道交通研究，2022，25（1）：134.
CAO Pengfei,YUAN Zongyi,CHEN Zhaoyang,et al.Analysis of the Influence of Groundwater Level Change Rate in Water-Rich Sand Layer on Shield Tunnel Structure[J].Urban mass transit，2022，25（1）：134.
CAO Pengfei,YUAN Zongyi,CHEN Zhaoyang,et al.Analysis of the Influence of Groundwater Level Change Rate in Water-Rich Sand Layer on Shield Tunnel Structure[J].Urban mass transit，2022，25（1）：134.
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