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体积比热与岩石含水率密切相关,但相关领域涉及较少,且含水率对体积比热影响没有形成系统的研究。对取自工程现场的2种粒径白垩系砂岩进行室内试验,测试含水率对体积比热的影响及变化机理。研究结果表明:常温下2种粒径白垩系砂岩的体积比热均随着含水率的不同而呈现不同的现象,随着含水率的增大其体积比热缓慢减小。分析了常温条件下岩石含水率与体积比热的关系,为在白垩系地层使用冻结法施工提供了有价值的参考经验。
The volumetric specific heat is closely related to the rock moisture content, but less involved in related fields, and the systematic study on the specific heat of volume has not been made. Two kinds of grain-size Cretaceous sandstones taken from the project site were tested in-house to test the effect of moisture content on specific heat of volume and its variation mechanism. The results show that the volume specific heat of Cretaceous sandstone with different grain sizes at room temperature shows different phenomena with different water cut, and its volume specific heat slowly decreases with the increase of water cut. The relationship between rock moisture content and volume specific heat at normal temperature is analyzed, which provides valuable reference for the construction of Cretaceous strata using freezing method.