Coarse soil material relative density testing and rolling compaction parameter measuring and calculating method

Abstract

The invention relates to the technical field of civil engineering performance testing, and discloses a coarse soil material relative density testing and rolling compaction parameter measuring and calculating method. The method can measure the minimum dry density and the maximum dry density at a time, an upper cushion material is separated through geotextile, it is guaranteed that the maximum dry density and the minimum dry density are completely the same soil materials, the correlation between a relative density test and filling vibration energy is established, rolling compaction parameters such as vibration energy, vibration amplitude and vibration frequency required for reaching the maximum dry density of the soil body are obtained through test and analysis calculation, the comprehensivesedimentation and breakage rate of the soil material under the action of a vibration load are further determined, and important parameters are provided for engineering, so the method has great popularization values and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of civil engineering performance testing, in particular to a method for testing the relative density of coarse soil materials and measuring and calculating rolling parameters. Background technique [0002] In the technical field of civil engineering performance testing, the relative density of soil refers to the ratio of the difference between the void ratio of the cohesive soil in the loosest state and the void ratio of the natural state, and the difference between the void ratio of the loosest state and the void ratio of the tightest state. Generally, the relative density is obtained by measuring the maximum dry density and minimum dry density of cohesionless soil, and converting the minimum void ratio and maximum void ratio of the soil. The relative density can comprehensively reflect factors such as the particle shape, gradation and structure of the soil, and can measure the compactness of the soil, and ...

AI Technical Summary

Problems solved by technology

[0004] At present, in water conservancy and hydropower projects, because the particle size of rockfill materials is too large, there is no standard method for determining the maximum dry density and minimum dry density of large-size coarse soil materials.

In addition, there is almost no research in the industry about establishing the correlation between the relative density test and the vibration parameters of the filling, and then evaluating and guiding the rolling test and filling construction.

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