【摘要】 压电陶瓷传感器在岩土工程中有很多应用,尤其是通过测量波速来确定土的性质方面。由于材料的物理性质与波速密切相关,压电陶瓷传感器提供了一种简便可靠的无损检测方法。本文报道了压电陶瓷传感器应用于粘土、砂和砾石等不同种类土的研究成果,对应力导致土体各向异性的研究,对路基和地基土的力学特性检测,在离心模型试验中的应用,以及在微重力环境下的粒状材料中波的传播特性的研究等。研究表明,压电陶瓷传感器在岩土力学研究和工程实践中有广阔的应用前景。更多还原

【Abstract】 Piezoelectric sensors have been widely applied in geotechnical engineering,especially in characterizing soils through measurement of wave velocities.Since mechanical properties of a material are closely associated with wave velocities,piezoelectric sensors provid a reliable and non-destructive method for the determination of soil properties.The following results of recent researches were presented on measuring stiffness of a wide range of soils such as clay,sand and gravel,characterizing anisotropic properties of soil induced by external loading,measuring stiffness of base and subgrade materials in the pavement,determining soil properties in a centrifuge model during the flight of a centrifuge,and understanding wave propagation in granular materials under micro-gravity environment with this technique.It was shown that piezoelectric sensors could be widely and effectively used in researches and practices of geotechnical engineering.更多还原