考虑土体三维剪切破坏的压密注浆理论模型

Theoretical Model of Compaction Grout Considering the Soil Three-Dimensional Shear Failure

考虑土体发生三维锥形剪切破坏的条件下,基于球孔扩张理论提出了一个新的压密注浆理论模型,分别推导出发生抬升作用时上抬力的计算公式和注浆压力的求解方法。与EI-Kelesh等人的计算结果进行相应比较,证明了所提出理论模型的正确性,同时分析了浆泡半径随注浆压力的变化规律,预测了不同土体在不同深度下的注浆压力值。

This paper presents a new theoretical model for the compaction grout is proposed based on the theory of the spherical space expansions and considering the effect of the three-dimensional cone shear failure of soil.The formulas foe estimating the uplift force and grouting pressure are also provided in the paper.The suggested method is also compared with the results from El-Kelesh’s method.The relationship between the radius of the grouting bulb and the grouting pressure is also established to predict the required grouting pressure at different soil depths.