土体膨胀冻胀联合测试装置及测试方法的应用

Study on Joint Test Device and Test Method of Soil Expansion and Frost Heave

针对膨胀土的冻胀性测试存在的不足,设计了一套用于土体膨胀冻胀联合测试的装置和测试方法。在测试过程中使膨胀土在常温下充分补水后达到最大变形量后,再进行冻胀性测试。试验结果表明,该装置和方法可用于膨胀土的冻胀性测试,试验条件与自然界膨胀土的冻胀条件更为相似,且膨胀土在补水充分且达到最大膨胀量后,会发生剧烈的冻胀变形,在寒区膨胀土的工程设计中应充分考虑其危害性,加以相应的防冻胀措施。

In order to solve the problem of frost heave test of expansive soil, a set of equipment and test method for expansion and frost heave joint test was designed. During the testing process, the expansive soil was fully filled at room temperature and then the maximum deformation was achieved. The experimental results show that the device and method can be used to test frost heave of expansive soil.The test conditions are more similar to the frost heaving condition of expansive soil in nature, and the expansive soil will have severe frost after sufficient water supply and maximum expansion. Expansion deformation, in the cold region of the expansive soil engineering design should give full consideration to its dangers, to the corresponding anti-frost heaving measures.