中文摘要：

本文通过室内模型试验研究地下疏放钻孔揭穿松散含水层时影响溃砂量大小的因素，试验模拟了6种不同直径的疏放水钻孔揭露4种不同粒径的含水砂层时，溃砂量与钻孔直径和砂粒径之间的关系。试验表明：砂粒径越小，最终溃砂量越大。对于同一粒径的砂来说，钻孑L直径越大，溃砂的速度越快，溃砂量随时间呈直线下降；钻孔直径小于15mm时，溃砂速度比较缓，溃砂量随时间变化的曲线为抛物线。

英文摘要：

This paper presents an experimental study of the factors influencing the volume of quicksand through underground boreholes for dewatering by exposing sand aquifers. Six blocks with various diameters to simulate boreholes with different diameters and 4 kinds of sands with different particle sizes are used to examine the relationship among the volume of quicksand, particle size and diameter of the borehole. The results show that the volume of quicksand increases with decreasing particle size of sand. For the same particle size of sand, the larger the diameter of the boreholes, the faster of speed of quicksand, and the volume of quicksand decreases linearly with time. While the diameter of the boreholes is smaller than 15 mm, the speed of quicksand is lower, and the curve of the volume of quicksand vs time is a parabola.