| 考虑注浆压力的顶管施工引起土体变形计算方法 |
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| 引用本文： | 李方楠,沈水龙,罗春泳.考虑注浆压力的顶管施工引起土体变形计算方法[J].岩土力学,2012,33(1):204-208. |
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| 作者姓名： | 李方楠 沈水龙 罗春泳 |
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| 作者单位： | 1. 上海交通大学 船舶海洋与建筑工程学院，上海 200240；2. 上海交通大学 国家海洋工程重点试验室，上海 200240 |
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| 基金项目： | 国家自然科学基金委与日本学术振兴会合作基金项目(No.50911140105);国家自然科学基金项目(No.41072209) |
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| 摘 要： | 顶管施工引起周围地层变形的计算预测是顶管施工中必须加以重视的问题。地层的沉降变形与顶管施工的几个环节有密切的联系，如：①顶管姿态与开挖面土压；②顶进与换管；③注浆过程等。理论分析应考虑这几个施工中的关键因素。针对上述施工影响因素，提出了考虑注浆压力的顶管施工的地层移动的计算方法。用Mindlin的位移解分析模拟开挖面土压、顶进与换管过程中的侧面摩擦力的变化引起的位移；以Sagaseta的土体损失引起的土体位移模式分析姿态控制、土体损失等引起的变形；将圆孔扩张的Verruijt解拓展到三维，用于计算注浆压力引起的位移与变形。结果表明，考虑注浆压力的变化，可以得到更为合理的预测结果。
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| 关 键 词： | 顶管 注浆压力 土体变形 |
| 收稿时间： | 2010-06-13 |
Prediction approach of ground deformation induced by pipe jacking construction considering grouting pressure |
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| LI Fang-nan
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SHEN Shui-long,
LUO Chun-yong.Prediction approach of ground deformation induced by pipe jacking construction considering grouting pressure[J].Rock and Soil Mechanics,2012,33(1):204-208. |
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| Authors: | LI Fang-nan SHEN Shui-long LUO Chun-yong |
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| Institution: | 1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | Prediction of ground deformation caused by pipe jacking is very important for safe construction.During the construction of pipe jacking,the ground deformation will be influenced by: ①the attitude of pipe jacking machine and the supporting pressure on excavation face;②the jacking process and the course of changing pipes;③the grouting process,etc..To analyze the ground movement during the construction of pipe jacking,a numerical approach is proposed.The Mindlin solution to vertical and horizontal force is used to calculate the ground deformation induced by the face support pressure and the lateral friction resistance,respectively.The Sagaseta method is adopted to consider the ground loss induced by over excavation.A complex variable method proposed by Verruijt is used to simulate the ground movement caused by grouting.Then a 3-D analytical solutions for ground movements induced by pipe jacking is obtained and applied to a case study.The results indicate that considering the grouting pressure can simulate the ground deformation induced by pipe jacking reasonably. |
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| Keywords: | pipe jacking grouting pressure ground deformation |
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