Geotechnical engineering anti-blast structure model test device

Abstract

The invention belongs to the technical field of geotechnical engineering model test equipment. The proposed geotechnical engineering anti-explosion structure model test device is composed of a side-limited box body and an explosion pit at the lower part, and is equipped with a matching wave-eliminating mechanism, a locking mechanism and a sliding Positioning mechanism; wave dissipation mechanism includes aluminum wave dissipation grid (21) and wooden wave dissipation plate (20); sliding positioning mechanism includes two-way jack cylinder (15), guide rail (17) and limit block (19); locking The mechanism is composed of a locking pull rod (3), a side limit connecting block (18) and a nut (2). The invention can simulate different explosion forms in equipment with moderate size; meet the convenient and feasible requirements for excavation of caverns, installation of enclosure structures and measurement equipment; it can be reused, and it is beneficial to observe the damage of structures in the test; The results can provide an important basis for underground explosion-resistant engineering design and scientific research.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering model test equipment, and mainly proposes a model test device for an anti-explosion structure of geotechnical engineering. Background technique [0002] Due to the importance of structural anti-knock performance, many scholars at home and abroad have carried out related research. The following is a brief description of representative research abroad and domestically: [0003] Example 1: Charles E.Joachim et al. of the United States conducted model tests on the impact of the explosion load density and the thickness and strength of the rock mass protective layer on the external damage of the tunnel caused by the accidental explosion of the underground explosive depot, and the degree of damage caused by the air shock wave and debris caused by the explosion. Were studied. [0004] The geometric scale of the model test is 1:25, the channel of the underground explosive storage model is...

AI Technical Summary

Problems solved by technology

[0012] 1. The existing anti-blast structure model test equipment is generally divided into two types. One is the test equipment specially designed for a certain anti-blast structure, such as Example 1. Such equipment is not standardized and cannot be reused. Economical waste; Second, although the equipment is standardized, the equipment cannot well meet the anti-knock performance research of the underground structure of geotechnical engineering. For example, in Example 2, the equipment is only provided with observation holes, and the direction of the tunnel is perpendicular to the direction of the observation holes. After the model is in place, the simulation process operations such as tunnel excavation and anchor cable installation cannot be realized, and it is also not conducive to observing the damage of the model. Another example is Example 3. Although the equipment is more suitable for the performance research of anti-blast structures in rock-soil media, the size of the model It is large, covers a large area, and the test model is completely buried underground, which brings great difficulties to the pouring of the model, excavation of the cavern, application of anchor cables (rods) and other enclosure structures, and measurement of the stress and strain of the anchor cables. Great difficulty, so that the scope of application of the equipment is limited

[0013] 2. When the existing anti-blast structure model test equipment is applied, the types of explosions that can be simulated are limited

Therefore, the application of the existing anti-explosion structure model test equipment is limited, and it is impossible to use it to carry out research on the destructive effect of the penetration explosion of the ground-penetrating weapon and the impact or penetration explosion of the nuclear weapon on the underground structure.

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