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首页> 外文会议>GEO-DENVER 2007 >FLUID-SOIL INTERACTION MODEL FOR JET GROUTING
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FLUID-SOIL INTERACTION MODEL FOR JET GROUTING

机译：射流灌浆的流固耦合模型

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This paper presents a mathematical model for describing the jet grouting process, using fundamental theories of jet hydrodynamics and soil mechanics. The proposed model assumes that the velocity distribution in the cutting jet is equivalent to that of a submerged free jet with boundaries corresponding to the dimensions of the cavity excavated in the ground. It was found that jet penetration distance in soil is governed by the nozzle diameter and the ratio of the pressure difference across the nozzle to the soil bearing resistance. The model predicts that the limit of jet penetration is reached when the average dynamic pressure at the jet tip becomes equal to the ultimate soil resistance. Soil resistance to jet penetration is observed to be about 40% of a circular surface punch. Comparison with full-scale jet grouting trial data suggests that the proposed model is reasonable for fine-grained soils, but is likely to give a lower bound estimate of the jet cutting distance in coarsegrained soils.
机译：本文利用射流水动力和土壤力学的基本理论，提出了一种描述射流注浆过程的数学模型。所提出的模型假定切割射流中的速度分布与水下自由射流的速度分布相等，其边界对应于在地下挖掘的空腔的尺寸。发现在土壤中的射流穿透距离由喷嘴直径和喷嘴两端的压差与承土阻力的比值决定。该模型预测，当喷嘴尖端的平均动压等于极限土壤阻力时，将达到喷嘴渗透极限。观察到土壤对射流穿透的抵抗力约为圆形打孔机的40％。与全尺寸喷射灌浆试验数据的比较表明，所提出的模型对于细粒土是合理的，但可能会给出粗粒土中射流切割距离的下限估计。

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