Experimental study on aqueous phase magnetic resonance of super soft soil under different load levels and rates -------------------------------------------------- ------------------------------ -------------------------------------------------- ------------------------------ The T2 relaxation time reflects the chemical environment in which the hydrogen protons in the sample are located, which is related to the binding force of the hydrogen proton and its degree of freedom (moisture state), and the degree of binding of hydrogen protons is inseparable from the internal structure of the sample. Relationship. In porous media, the larger the pore size, the longer the water relaxation time exists in the pores; the smaller the pore size, the greater the degree of binding of water present in the pores, and the shorter the relaxation time. It is the T2 relaxation spectrum of 15 silt samples. For more details, please refer to the literature "Study on the NMR of supersoft soil in different soft soils at different load levels and rates", Acta Phy. Sinica, Vol. 63, No. 1 (2014) 018202 The whole trousers are revealing the feelings of youth and spring. Cartoon flowers give this Beach Shorts a spring vibe, very vigorous and uplifting. These beach shorts have three pockets which is designed to carry your belongings easily. This brings great convenience for your travel. This pair of men's beach shorts is the best choice for your trip! Polyester Beach Pants,Lovely Beach Shorts,Brown Beach Shorts,Mens Walking Beach Pants Xinhui Jielide Garment Factory , https://www.ntgfwear.com
In recent years, NMR has been used as an interdisciplinary test technique for the study of different sandstone rocks, catalysts, colloids and biological tissues, and is increasingly used in a variety of material physics and geometries including geotechnical media. Test and estimation, such as the characteristics of various types of gel pore water in cement under the condition of progressive precipitation of water; rock aquifer range test and its estimation of rock porosity, permeability, hydraulic conductivity, and in the field of petroleum and its mining The analysis and application of the medium involved. The technical method is also applied to the correlation analysis of soft soil mainly composed of mesoscopic minerals and water-containing pores.
The following is a brief introduction to the nuclear magnetic resonance water phase test based on the different types of load levels and rate tests of the actual soil silt to explore which load levels and rates of saturated super soft soil (sludge) in the combined water ( Mainly for weakly bound water) can be converted into free water and possible correspondence with the amount of conversion, in order to provide the basis for foundation engineering design.
NMR T2 spectrum / moisture distribution 
The top graph shows the T2 relaxation spectra of 15 silt samples.
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The following figure clearly shows that the true triaxial (100 kPa confining pressure, 100 kPa vertical impact load level, loading rate of 1.6 MPa/s and below) is basically unchanged from the first peak of the test samples at different frequencies. . It indicates that the non-free water in this kind of load frequency and level will not be converted into free water; compared with before the test, the non-free water can be converted into free water under high-speed impact load, and the larger the total impact energy, the easier it is to precipitate free water. In addition, as can be seen from Fig. 4(c), the influence of the confined constraint stiffness of the sample on the conversion of non-free water to free water is negligible. 