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Method of investigating the compatibility of cohesive soils
Conclusions With respect to the method of layerwise construction of earth structures from cohesive soils, it is recommended to determine the optimum values of the moisture content and maximum values of density by one of the following methods correlated with a particular type of modern compacting machines passing 8–10 times on a layer with a thickness of 0.35–0.40 m.It is recommended to select the method determining the characteristics of compactibility as a function of the particle-size distribution of the material being tested: for soils with inclusions of fractions smaller than 20 mm it is necessary to use the SoyuzdorNII-Proctor instruments, having equipped them with interchangeable weights with a mass of 2, 3, 4, 6, and 8 kg, and in other respects to be guided by the conventional method; for soils with inclusions of fractions greater than 20 mm it is necessary to use large consolidation presses with a height of 0.35–0.40 m and series-produced hydraulic presses (Test Machine Plant in Armavir) which can create pressures of 0.5, 0.75, 1, 1.5, and 2 MPa, and in other respects to be guided by the examined method.When the type of roller and pressure transmitted to the soil by it are known, it is sufficient to perform one cycle of determination of the characteristics of compactibility for one value of the mass of the weight on the standard instrument or pressure of the plate in the consolidation press and as a result to obtain one value of the optimum moisture content and one value of the maximum density corresponding to it. If the type of roller is not known, then it is necessary to perform several cycles of determination of the characteristics of soil compactibility for different values of the mass of the weight or plate pressure and as a result to obtain two interrelated functions $ w^{opt} $= w($ m_{i} $, $ σ_{i} $) and γdmax=γ($ m_{i} $, $ σ_{i} $) by means of which the necessary values of the optimum moisture content and maximum density can be subsequently selected.
Method of investigating the compatibility of cohesive soils
Conclusions With respect to the method of layerwise construction of earth structures from cohesive soils, it is recommended to determine the optimum values of the moisture content and maximum values of density by one of the following methods correlated with a particular type of modern compacting machines passing 8–10 times on a layer with a thickness of 0.35–0.40 m.It is recommended to select the method determining the characteristics of compactibility as a function of the particle-size distribution of the material being tested: for soils with inclusions of fractions smaller than 20 mm it is necessary to use the SoyuzdorNII-Proctor instruments, having equipped them with interchangeable weights with a mass of 2, 3, 4, 6, and 8 kg, and in other respects to be guided by the conventional method; for soils with inclusions of fractions greater than 20 mm it is necessary to use large consolidation presses with a height of 0.35–0.40 m and series-produced hydraulic presses (Test Machine Plant in Armavir) which can create pressures of 0.5, 0.75, 1, 1.5, and 2 MPa, and in other respects to be guided by the examined method.When the type of roller and pressure transmitted to the soil by it are known, it is sufficient to perform one cycle of determination of the characteristics of compactibility for one value of the mass of the weight on the standard instrument or pressure of the plate in the consolidation press and as a result to obtain one value of the optimum moisture content and one value of the maximum density corresponding to it. If the type of roller is not known, then it is necessary to perform several cycles of determination of the characteristics of soil compactibility for different values of the mass of the weight or plate pressure and as a result to obtain two interrelated functions $ w^{opt} $= w($ m_{i} $, $ σ_{i} $) and γdmax=γ($ m_{i} $, $ σ_{i} $) by means of which the necessary values of the optimum moisture content and maximum density can be subsequently selected.
Method of investigating the compatibility of cohesive soils
Pakhomov, O. A. (author)
1985
Article (Journal)
English
BKL:
56.30
Wasserbau
Local classification TIB:
770/6550/8000
Method of investigating the compatibility of cohesive soils
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