A Method for Acquiring Soil Relaxation Rate

Abstract

The invention discloses a soil relaxation rate acquisition method, which belongs to the technical field of geotechnical engineering. The method for obtaining the relaxation rate of the soil body comprises the following steps: soak and wash the soil particles in distilled water and then air-dry to obtain the soil body; prepare the soil body into several samples, and the water contents of several samples are all different; Put the sample into the NMR instrument, apply sequences to several samples, invert the original NMR data, and obtain the pore water NMR relaxation time distribution curve of several samples; find the peak point value on the NMR relaxation time distribution curve, The relaxation rate of the corresponding sample is obtained according to the peak point value; according to the relaxation rate of several samples and the water content of several samples, a relaxation rate-water content diagram is made, and found in the relaxation rate-water content diagram The straight line segment, and the average value of the relaxation rate of the straight line segment is calculated, and the average value is the final relaxation rate of the soil sample. The method for obtaining the relaxation rate of the soil body of the invention can quickly and directly test the relaxation rate of the soil body, and improves the testing efficiency.

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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