径向压裂法在冻土抗拉强度测定中的应用

Application of the Radial —Splitting Method to Determining Tensile Strength of Frozen Soil

本文通过饱水黄土试验，探索径向压裂法（以下简称“径压法”）测定冻土抗拉强度的可能性，以及与基本影响因素的关系。试验表明，径压法测定的抗拉强度结果，具有良好的稳定性，除土质、含水量和密度之内在因素外，与温度和机速有密切相关。径压法抗拉强度与温度、机速、破坏时间、机器行程之间，以及破坏时间与温度、机速之间都遵循各自规律，可用一定函数描述。径压法测定冻土抗拉强度是可行的。

The paper discusses possibility with the radial -splitting method to determine tensilestrength of frozen soil and variations of the test results with the basic active factors in testingon saturated loess．The test results show that values of tensile strength measured by theradial－splitting test are well stable and obviously varied with the temperature and machinespeed under conditions of the given soil， water content and density. Variations of the tensilestrength with temperature， machine speed（displacement rate controlled by the machine），timeto failure and throw of machine and of time to failure with temperature and machine speedfollow specific laws and may be expressed by functions separately． It is practicable to deter-mine tensile strength of frozen soil with the radial－splitting method.