| 区间隧道暗挖施工引起地表沉降数值分析 |
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| 引用本文： | 王腾.区间隧道暗挖施工引起地表沉降数值分析[J].路基工程,2017,0(1):160-164. |
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| 作者姓名： | 王腾 |
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| 作者单位： | 中铁五局集团第四工程有限责任公司, 广东韶关 512031 |
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| 摘 要： | 以某地铁暗挖区间隧道施工为工程背景，运用MIDAS-GTS数值模拟，探讨了隧道埋深、地层条件、支护条件等因素对地铁区间隧道暗挖施工引起地表沉降的影响。研究结果表明:随着隧道埋深和土体弹性模量、黏聚力及内摩擦角的增大，均使开挖过程中的土体扰动效应减小。而支护强度对最大地表沉降量Smax、地层损失率Vl及沉降槽宽度系数i的影响不明显。
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| 关 键 词： | 地铁 暗挖施工 地表沉降 数值模拟 沉降槽 |
| 收稿时间： | 2019-11-07 |
Numerical Simulation Analysis of Surface Settlement Caused by Underground Tunnel Excavation Construction |
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| Abstract: | Numerical simulation is performed for underground tunnel excavation construction of certain metro by MIDAS-GTS to research the influence of tunnel depth, formation condition, support condition and other factors on the surface settlement caused by underground excavation is discussed. The results show that with the increase in tunnel depth, and the elastic modulus, cohesion and internal friction angle of soil, the disturbance effect of soil is decreased during excavation. The support strength has no obvious impact on maximum surface subsidence Smax, formation loss rate Vl and settlement trough width coefficient i. |
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