影响辽宁黄土渗透系数变化因素研究

Research of the Liaoning's Loess Penetration Coefficient Affected Factors

对辽宁省铁岭至朝阳高速公路的黄土地段进行选择性取土,针对不同路段、不同深度的土样,采用逐级变化压力的方式进行多组变水头渗透试验;根据数据建立渗透系数与深度关系曲线,分析辽宁黄土渗透系数与埋藏深度的规律变化.对不同压力下的渗透系数数据进行整理统计,绘制曲线,总结多级压力下渗透系数变化规律.利用在某压力范围内渗透系数与压力成线性变化关系,建立一次线性方程进行模拟.结果表明,由此规律进行土样渗透系数计算与实测结果较为接近。

To take highway＇s loess land sector carries on the selectivity to Liaoning province from Tieling to Chaoyang, in view to the different road section, the different depth＇s soil sample, used changing in level at the pressure the way to carry on multiple sets of variable-head permeability test, according to the relation curve between penetration coefficient and the depth, analyzed the Liaoning＇s loess penetration coefficient and the burial depth rule. Carried on the statistics to under the different pressure＇s penetration coefficient data and curves, and summarized under the multistage pressures the penetration coefficient rule. According to the linear variation relations between the penetration coefficient and the pressure in some pressure scope, established a linear equations to simulate, finally indicated that some soil sample penetration coefficient computation and the actual result is closer.