核磁共振在岩土工程方面的应用综述

Review on application of nuclear magnetic imaging in geotechnical engineering

准确地测量岩土体中水分的变化及孔隙的变化对于岩土体的力学性质、施工方法有重要的指导意义,而核磁共振技术在检测岩土体孔隙及水分变化方面,具有快速、无损、分辨率高、精准性高等优点。本文主要介绍了核磁共振的原理,简要说明了核磁共振成像技术,以及核磁共振技术在岩土工程方面的研究现状。

Accurate measurement of moisture and pore changes in the rock and soil mass is of great significance for its mechanical properties and construction methods.However,the nuclear magnetic resonance(NMR) technology has such advantages as rapidness,no damage,high resolution and high accuracy in the detection of pore and moisture changes in rock and soil mass.In this article,the principle of nuclear magnetic resonance(NMR) is mainly introduced,the relaxation time and the nature of relaxation mechanism are summarized,the relationship between relaxation time and the microscopic pore is described,the principle of Magnetic Resonance Imaging(MRI)and its application in geotechnical engineering are briefly illustrated,and the research status of nuclear magnetic resonance(NMR) technology in geotechnical engineering is sketched out.