Evaluating compaction quality of soil-rock mixture based on theory of elastic waves

A new method based on the theory of elastic waves is founded to evaluate the compaction quality of soil-rock mixture accurately and efficiently. Based on large numbers of laboratory tests and analyses, the model for shear wave velocity propagation in soil-rock mixture is established. Then the compaction of fine-grain soil between rocks can be calculated, and it can represent the compaction quality of soil-rock mixture. In the end, the maximum dry densities of the fine-grained soil in different kinds of the soil-rock mixture with different quantities of water and rock are presented according to the results of a lot of vibration compaction tests in laboratory, and the criteria for the nominal compaction quality of soil-rock mixture are constituted. The relationship between the shear wave velocity and the Rayleigh wave velocity is analyzed, and the results can give a hand to get shear wave velocity by Rayleigh wave tests. Finally, the proposed method is used to evaluate a program of airport runway soil-rock mixture foundation to verify its feasibility.