跨孔阻尼比测试的原理与方法及其在核电厂地基测试中的应用

The principle and method of crosshole seismic test and its application in the investigation of nuclear power plants

本文概括了岩土体阻尼比测试的各类方法,重点说明了跨孔阻尼比测试的测试原理与方法,结合核电厂岩土工程勘察工程实践,提出了具体的跨孔阻尼比测试技术要求。工程应用与分析表明,跨孔阻尼比测试为破碎岩体及强风化岩体阻尼比的测试提供了一种行之有效的测试方法,可以测定地基小应变情况下的材料阻尼比,在核电厂地基岩土工程勘察中具有广阔的应用前景。

All kinds of the ground damping ratio testing methods are summarized in the paper.The principle and procedures of damping ratio test by crosshole seismic method is described.The test requirements of damping ratio test by crosshole seismic method are specified for nuclear plant investigation work.The engineering practice and analysis shows that the crosshole seismic test is an effective method to determine the damping ratio of fractured and highly weather rock,and which is suitable for ground damping ratio test under small strain conditions.