Semi-module test box for dynamic compaction reinforced foundation model test

Abstract

The invention belongs to the technical field of rock-soil engineering, and in particular relates to a semi-module test box for dynamic compaction reinforced foundation model test. The semi-module test box consists of a chute, a fixed cross beam, a bracket, a guide rod, a semicircular model hammer, a limit rod, a fixed corner bracket, a model box, a soil pressure box and an acceleration sensor. The fixed cross beam is welded with a cross rod; and a vertical rod in the bracket is connected with an angle steel above the model box. The chute is fixed on the cross beam; a sliding bolt is embedded into the chute, the upper end of the guide rod is connected with the sliding bolt, and the lower end of the guide rod is suspended; and the guide rod passes through a central hole of the semicircular model hammer, the limit rod is positioned above the model box, the upper end of the limit rod is welded with the cross rod in the bracket, and the lower end of the limit rod is welded with the angle steel on the model box. The model box consists of the angle steel, an organic glass board, side panels, a back board and a bottom board; the soil pressure box is embedded in a soil sample; and the acceleration sensor is placed on the top of the soil sample. The semi-module test box ensures that the internal deformation of the soil under the action of dynamic compaction can be directly and conveniently observed, and can measure related data of dynamic stress and the like.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a half-mold test box for foundation model tests reinforced by a dynamic compaction method. Background technique [0002] The dynamic compaction method is a ground reinforcement method pioneered by the French Menard technology company in 1969. The soil is rammed with a rammer to make the soil more compact, and the strength and bearing capacity of the soil are greatly improved. In recent years, the dynamic compaction method has been widely used in foundation treatment projects at home and abroad, and has become one of the main methods for large-area foundation treatment. However, there are still few studies on the reinforcement mechanism of dynamic compaction and the influence of various tamping parameters on the effect of dynamic compaction. Although the dynamic compaction method has developed rapidly, the design and construction of the dynamic compac...

AI Technical Summary

Problems solved by technology

However, there are still few studies on the reinforcement mechanism of dynamic compaction and the influence of various tamping parameters on the effect of dynamic compaction.

Although the dynamic compaction method has developed rapidly, the design and construction of the dynamic compaction method are still in a semi-theoretical and semi-empirical state, and the construction parameters on site still need to be determined through a large number of field tests, lacking the necessary theoretical basis, and there are large blindness and Uncertainty

Through the indoor model test, the reinforcement mechanism of the dynamic compaction method can be studied in depth, and the optimal design method of the dynamic compaction method can be proposed. However, due to the lack of a reasonable dynamic compaction indoor model test device, it is difficult to carry out the indoor model test of the dynamic compaction method, which restricts the dynamic compaction method. Further development and improvement of the law

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