中文摘要：

沿河路堤水毁灾害经常发生,研究水在路堤中的土水特性和渗透性具有很重要的实际意义。以路堤压实砾类土为研究对象,通过离心模型试验,测量了土体增湿和减湿过程的孔隙水压力,结合有限元数值计算,基于随机搜索和优化算法,反演了压实砾类土增湿过程的土水特性参数和渗透系数,确定了土水特征曲线方程。计算结果表明：用离心试验结合数值计算方法研究压实砾类土的土水特性是经济可行的;压实砾类土增湿过程中,土水特征参数a为15.6,n为4.0,残留体积含水量θr为0.001;饱和土的渗透系数为5.0×10^-7m/s,该研究可为公路工程灾害防治研究提供计算参数。

英文摘要：

Because water devastations often take place in the highway engineering, it is very important to research the soil hydraulic properties and seepage of compacted gravel soil for embankment. In the process of the centrifuge model test, the pore water pressure of gravel soil is measured in increasing and decreasing water content. The soil hydraulic properties parameters and hydraulic conductivity coeffi- cient are obtained by indirect method through the finite element calculation. The result are that the soil hydraulic properties parameters of gravel soil in the increasing water content, a is 15.6, n is 4.0, Or is 0. 001, hydraulic conductivity coefficient Ksat of saturated gravel soil is 5.0×10^-7m/s. This will provide parameters for calculating of highway engineering.