Method for obtaining relaxation rate of soil body

Abstract

The present invention discloses a method for obtaining a relaxation rate of the soil body, and belongs to the technical field of geotechnical engineering. The method for obtaining the relaxation rateof the soil body comprises the following steps: soaking and washing soil particles in distilled water and then performing air-drying to obtain the soil body; preparing the soil body into multiple samples, wherein the water content of multiple samples is different; putting the multiple samples into the nuclear magnetic resonance (NMR) spectrometer, applying a sequence to the multiple samples, and performing inversion on the original NMR data to obtain a pore water nuclear magnetic relaxation time distribution curve of the multiple samples; finding out a peak point value on the nuclear magneticrelaxation time distribution curve, and obtaining the relaxation rate of the corresponding sample according to the peak point value; and according to the relaxation rate of the multiple samples and the water content of the multiple samples, making a relaxation rate-water content graph, finding out a straight line segment in the relaxation rate-water content graph, and finding the average value ofthe relaxation rate of the straight line segment, wherein the average value is the final relaxation rate of the soil sample. According to the method for obtaining the relaxation rate of the soil bodyprovided by the present invention, the relaxation rate of the soil body can be quickly and directly tested, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for obtaining relaxation rate of soil mass. Background technique [0002] As a kind of engineering material and engineering environment, rock-soil medium has an important impact on the engineering mechanical properties of rock-soil mass, engineering construction methods, safety and stability, etc., in the physical state and possible physical changes of water. Especially in complex geotechnical engineering problems with multi-field and multi-phase coupling such as frozen soil, hydrated soil and unsaturated soil, a series of physical state changes such as the content, migration and redistribution of moisture inside the soil will obviously affect the The engineering mechanical properties of soil. The effectiveness of special soils such as expansive soils and collapsible soils is also closely related to the moisture content and distribution in the soil, ind...

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Problems solved by technology

[0004] The invention provides a method for obtaining the relaxation rate of soil, which solves or partially solves the technical problems of low efficiency, cumbersome operation and low precision of the method for obtaining the relaxation rate in the prior art

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