应用基于太沙基的半解析一维固结理论,研究往复荷载作用下粉质黏土固结系数的变化规律。利用固结试验中的加载和卸载过程来模拟往复荷载,认为加载和卸载过程中的固结系数不同。通过试验得到粉质黏土加载和卸载的固结系数,对其变化规律进行研究,进而为实际工程提供参考。试验结果表明:往复荷载下在周期与荷载增量相同时,加载与卸载过程的固结系数随压力的增大呈减小趋势;在相同压力与相同荷载增量下,随着周期的增大,固结系数也呈减小趋势。对试验数据进行数值模拟,得到加载与卸载固结系数的函数关系为线性关系,并求得二者比值约为0.095,运用此值可以缩短测往复荷载作用下固结系数所需的时间,并为计算固结度以及沉降量提供参考。 The semi-analytical one-dimensional consolidation theory based on terbuthyre was used to study the variation of consolidation coefficient of silty clay under cyclic loading. Using the loading and unloading process in the consolidation test to simulate the reciprocating load, the consolidation coefficient in loading and unloading process is considered to be different. Through the experiment, the consolidation coefficient of silty clay loading and unloading is obtained, and the variation regularity of the silty clay is studied, which will provide references for practical engineering. The experimental results show that the consolidation coefficient of loading and unloading process decreases with the increasing of pressure under the same cyclic loading and reciprocating load. Under the same pressure and the same load increment, with the increase of the cycle , The consolidation coefficient also showed a decreasing trend. The numerical simulation of the experimental data shows that the relationship between the loading and unloading consolidation coefficient is linear and the ratio between the two is about 0.095. By using this value, the time needed to determine the consolidation coefficient under the reciprocating load can be shortened. For the calculation of the degree of consolidation and settlement provide a reference.