| 顶管工程中的地层损失参数和土体变形计算 |
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| 引用本文： | 景 路,袁聚云,袁 勇.顶管工程中的地层损失参数和土体变形计算[J].岩土力学,2013,34(Z1):173-178. |
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| 作者姓名： | 景 路 袁聚云 袁 勇 |
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| 作者单位： | 1.同济大学 地下建筑与工程系，上海200092； 2.同济大学 岩土及地下工程教育部重点实验室，上海200092 |
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| 摘 要： | 目前的地层损失参数和土体变形计算方法不能反映顶管施工的动态过程，重新定义顶管施工过程中的地层损失参数，使之可以反映超挖、欠挖等不同工况。基于Mindlin解，改进间隙参数g，从而可以考虑管壁与土的摩擦力。基于开挖面周围土体的扰动分区，修正Loganathan土体变形公式，并将改进的间隙参数g代入修正公式，计算顶进距离不同时的土体变形，获得顶管推进过程中地表测点的动态变化。算例分析表明，计算结果与监测数据吻合较好。
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| 关 键 词： | 地层损失 间隙参数 土体变形 顶管法 |
| 收稿时间： | 2012-10-25 |
Ground loss parameter and soil deformation in pipe jacking |
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| JING Lu,YUAN Ju-yun,YUAN Yong.Ground loss parameter and soil deformation in pipe jacking[J].Rock and Soil Mechanics,2013,34(Z1):173-178. |
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| Authors: | JING Lu YUAN Ju-yun YUAN Yong |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China |
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| Abstract: | The traditional definition of the ground loss parameter is redefined and incorporated on to analytical solutions to predict the ground deformation in different cases of over-shaped or under-shaped in pipe jacking. The gap parameter g is improved based on Mindlin’s solution, so as to take account of the friction force between pipe and soil. Based on the excavation of soil disturbance around the partition, Loganathan soil deformation formula is amended.The improved gap parameter g is substituted into the amending formula to calculate jacking distances at different soil deformation; and then the surface dynamic change is obtained in top tube of the process of measuring. The case study shows that the results are in good agreement with the observed data. |
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| Keywords: | ground loss gap parameter gound deformation pipe jacking |
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