| 考虑泥浆套不同形态的顶管管壁摩阻力计算公式 |
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| 引用本文： | 王 双,夏才初,葛金科.考虑泥浆套不同形态的顶管管壁摩阻力计算公式[J].岩土力学,2014,35(1):159-166. |
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| 作者姓名： | 王 双 夏才初 葛金科 |
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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. 上海城建市政工程（集团）有限公司，上海 200065 |
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| 基金项目： | 上海城建集团科技攻关项目(No. 11231202400)。 |
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| 摘 要： | 大直径、长距离顶管施工常通过注浆形成泥浆套来减小阻力，泥浆套的形态及其完整性对管壁摩阻力大小有决定性作用，现有摩阻力计算公式一般未考虑不同泥浆套形态对摩阻力的影响，计算结果与实际情况相差较大。根据不同施工状况对顶管外壁泥浆套的可能形态进行了分类及成因分析，提出了判断3种常见泥浆套形态的方法。利用半无限弹性体中柱形圆孔扩张理论探讨了注浆压力对泥浆套厚度的影响，结合非线性流体力学计算泥浆与管壁接触产生的摩阻力，最终采用挖掘面稳定假设，针对3种泥浆套形态提出了摩阻力计算公式。采用该方法对工程案例进行计算，计算结果与实测数据对比表明：现有摩阻力计算公式的计算结果过于保守，所提出的计算公式是合理和有效的。
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| 关 键 词： | 顶管 泥浆套 注浆 摩阻力 |
| 收稿时间： | 2013-05-13 |
Formulae of lateral friction resistance for pipe-jacking considering different forms of mud screen |
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| WANG Shuang,XIA Cai-chu,GE Jin-ke.Formulae of lateral friction resistance for pipe-jacking considering different forms of mud screen[J].Rock and Soil Mechanics,2014,35(1):159-166. |
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| Authors: | WANG Shuang XIA Cai-chu GE Jin-ke |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai Unban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China |
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| Abstract: | Mud screen is formed to reduce the jacking friction in long-distance and large-diameter pipe jacking; the form and wholeness of mud screen determine the lateral friction resistance for pipe-jacking; the existing formulae of lateral friction resistance do not take account of the effect of different forms of mud screen; there are large differences between the calculation results and the actual friction resistance. The possible forms of mud screen are classified and analysed based on different construction conditions; the method for determining the forms of mud screen is presented. The influence of the injecting pressure on the thickness of mud screen is discussed; the lateral friction resistance caused by mud slurry is calculated using nonlinear fluid mechanics. Finally, a formula of lateral friction resistance for pipe jacking with different forms of mud screen is put forward using the assumption of stable mining face. The new calculation method is used in an engineering case; the calculation results are compared with the measured data; it is shown that the existing formulae are conservative and the formula of this article is more reasonable. |
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| Keywords: | pipe jacking mud screen injecting slurry friction resistance |
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