| 天津软土地层运营盾构隧道纵向不均匀沉降分析及应对措施探讨 |
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| 引用本文： | 高翔.天津软土地层运营盾构隧道纵向不均匀沉降分析及应对措施探讨[J].路基工程,2019,0(3):135-139. |
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| 作者姓名： | 高翔 |
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| 作者单位： | 中国铁路设计集团有限公司,天津,300000 |
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| 摘 要： | 天津软土地层大直径盾构隧道，受区域不均匀沉降影响产生纵向不均匀沉降，此类沉降会侵占已运营隧道内轮廓，对区间隧道正常运营造成影响。为此，基于InSAR分析及隧道所在地层水准点沉降数据预测30年及100年隧道所在地层累计沉降。分析预测累计沉降值在同一坡度范围内的差异沉降，得出隧道全线最大差异沉降。针对隧道横断面预留竖向最大调整空间受纵向不均匀沉降影响不满足远期运营需求的情况，探讨应对措施的可行性。
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| 关 键 词： | 软土地层 大直径盾构 纵向不均匀沉降 隧道内轮廓 应对措施 |
| 收稿时间： | 2019-11-06 |
Analysis of Longitudinal Uneven Settlement of Shield Tunnel Operated in Tianjin Soft Ground and the Countermeasures |
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| Abstract: | The large-diameter shield tunnel in Tianjin soft ground, as the result of regional uneven settlement, was subject to longitudinal uneven settlement which would invade the internal profile of tunnel operated, and then impact the normal operation of interval tunnel. Therefore, based on InSAR analysis and the benchmark settlement data of the layer where the tunnel locates, the accumulative settlement of this layer in 30 and 100 years were predicted herein, and the difference of these predicted values within the same range of slope was analyzed, so as to find the maximum differential settlement in the whole line. The allowed maximum vertical adjustment room of the tunnel cross section, influenced by longitudinal uneven settlement, did not meet the requirement of future operation, then the feasibility of countermeasures was discussed. |
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