Indoor model test device by dynamic replacement method

Abstract

The invention belongs to the technical field of geoenvironmental engineering, in particular to an indoor model test device by a dynamic replacement method, which comprises a pulley frame, a bracket, a fixing rod, a model case, a screwed reinforcement, an acceleration tester, a soil sample, a pressure box, a pulley, a dragrope, a hook, a rammer, a cut joint, a fixing hole and a strap. The pulley frame, the bracket, the fixing rod, the fixing hole, the pulley, the dragrope, the hook and the rammer form a loading system, the bracket is welded at he lower end of the pulley frame, the fixing rod is welded at the bottom end of the bracket, the model case comprises two rectangular bodies with hollow insides, the two rectangular bodies are connected through the screwed reinforcement, the cut joint is positioned between the two rectangular bodies, the fixing hole is arranged on the model case, and the fixing rod is inserted into the fixing hole; the pulley is hung on the pulley frame, one end of the dragrope is connected with the hook, the other end thereof is placed by winding the pulley, the vertical projection of the hook needs to be positioned at the central position of the model case,the rammer is hung below the hook, the soil sample is filled in the model case, the pressure box is buried in the soil sample, and the acceleration tester is placed above the soil sample. The device of the invention has simple disassembly and reasonable and convenient observation, is mainly and particularly suitable for a dynamic replacement indoor model test and can also be additionally used for the indoor model tests in multiple dynamic consolidation types, thereby relieving the problem of deficiency of the traditional dynamic consolidation indoor model test device.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an indoor model test device of a dynamic compaction replacement method. Background technique [0002] The dynamic compaction method is a ground reinforcement method pioneered by the French Menard Technology Company in 1969. Since its development, the dynamic compaction method has been widely used in foundation treatment projects at home and abroad. However, at present, the influence of various parameter changes on the reinforcement effect in the design of dynamic compaction, and the mesoscopic mechanism of soil under the action of dynamic compaction must be solved and recognized in construction. Therefore, various experiments of dynamic compaction are needed to study these issues. [0003] Most of the tests about dynamic compaction are field tests at present, and the devices for indoor tests are extremely scarce. Affected by site conditions, etc., t...

AI Technical Summary

Problems solved by technology

Affected by site conditions, etc., the implementation of on-site tests is complicated, and the projects that can be used for on-site tests are limited, making it inconvenient to carry out on-site tests

However, the existing limited indoor test equipment is not perfect enough, and the consideration is not careful enough.

This limits the research on various mechanisms of the dynamic compaction method, and restricts the further development and improvement of the dynamic compaction method.

Moreover, most of the existing dynamic tamping indoor test devices are semi-model devices, and the accuracy of the test is limited.

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