中文摘要：

膨胀力是体现膨胀岩土工程特性的一个非常重要的参数,也是研究膨胀岩土抗剪强度理论的一个重要的思路。通过对多个试验结果的分析,深入研究了初始吸水率、干密度以及时间对膨胀力的影响。通过不同计算结果与试验数据的对比分析,得到膨胀力随初始吸水率的增大而减小,可以用指数函数关系进行拟合;膨胀力随干密度的增加而增大,同样可以采用指数函数进行拟合;膨胀力与时间之间可以用分段指数函数进行拟合;膨胀力与初始含水率、干密度以及时间之间的关系,提出了一个考虑初始含水率、干密度以及时间3个参数的膨胀力的计算公式,为进一步研究膨胀岩土的抗剪强度理论奠定了一定的理论基础。

英文摘要：

The swelling pressure is an important parameter of reflecting the character of swelling rock and soil engineering,and is also a key thought to study the shear strength theory of swelling rock and soil.After several tests,the influence factors to swelling pressure magnitude are analyzed including initial water content,dry density and time.Through comparing the computational solution with test data,it is obtained that swelling pressure is gradually decreasing with initial water content increasing.Its relationship can be expressed with power function.And the swelling pressure is gradually increasing with dry density increasing.Its relationship can be expressed power function.After analysis,it is shown that the relationship between swelling pressure and time can be fitted with power function.Colligating the above-mentioned research findings,a swelling pressure expression was advanced which synthetically considering the initial water content,dry density and time.It is profitable for in-depth studying the swelling rock and expansive soil shear strength theory.