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Flexible composite air-curtain shock absorption protective device for underwater explosion

A protective device and air curtain technology, which is applied in blasting and other directions, can solve the problems of no suitable, convenient and efficient underwater shock-absorbing protective device, etc., and achieve the effect of convenient installation, large compression capacity and good protective effect

Inactive Publication Date: 2011-05-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, when carrying out underwater blasting construction, there is no suitable, convenient and efficient underwater shock-absorbing protection device for underwater structures near the explosion source.

Method used

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  • Flexible composite air-curtain shock absorption protective device for underwater explosion
  • Flexible composite air-curtain shock absorption protective device for underwater explosion
  • Flexible composite air-curtain shock absorption protective device for underwater explosion

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Embodiment Construction

[0012] In underwater engineering blasting, the key protection objects are mainly bridge piers, piers, dams, embankments, etc., generally non-contact blasting. For non-contact blasting, it is possible to install a shock-absorbing protective device between the blasting source and the protected object. According to the characteristics of underwater blasting shock waves, the shock absorption principle of the present invention is as follows: (1) The flexible composite air curtain protection device has greater compressibility, and can absorb impact energy through the compression deformation of the protection device; (2) Underwater There is an obvious fluid-solid coupling interaction between the blasting shock wave and the protective device. The use of flexible protective devices helps to reduce the blasting shock load acting on the protective device through the fluid-solid coupling interaction; (3) the protective device It has sufficient toughness and ability to resist large deformat...

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Abstract

The invention discloses a flexible composite air-curtain shock absorption protective device which comprises a flexible composite air curtain, a counterweight and a hanging pull rope, wherein the upper and lower sides of the flexible composite air curtain are respectively provided with a plurality of hanging rings, the upper side of the flexible composite air curtain is connected with the hanging pull rope through the hanging rings, and the lower side of the flexible composite air curtain is connected with the counterweight through the hanging rings; and the flexible composite air curtain comprises an air cavity, a flexible air curtain surface layer, longitudinal reinforcing fiber cord threads, transverse reinforcing fiber cord threads and air cavity side walls. The invention embodies the idea of conquering the unyielding with the yielding for the impact of the underwater explosion; and due to the characteristics of high toughness, high compression capacity, convenience in mounting and the like, the flexible composite air-curtain shock absorption protective device for underwater explosion can obviously relieve the impact waves of the underwater explosion and perform favorable protective function for the protected object.

Description

Technical field [0001] The invention relates to the technical field of engineering blasting, in particular to a flexible composite air curtain damping protection device under the action of underwater blasting. Background technique [0002] Underwater blasting is widely used in: cofferdam demolition, port channel dredging, underwater foundation excavation, blasting compaction and soft foundation treatment, blasting embankment, rock plug blasting and other fields. Unlike blasting in the air and rock masses, underwater blasting shock waves have high peak overpressure, slow attenuation, and wide spread range, which have serious damage effects on nearby buildings in the water. At present, there have been many studies and summaries on the laws of vibration attenuation and safety control standards of land blasting at home and abroad, but the results of underwater blasting are still relatively lacking. With the expansion of the scale of the project and the increasingly complex implement...

Claims

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Application Information

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IPC IPC(8): F42D5/00
Inventor 王振宇梁旭刘国华蒋建群李富强
Owner ZHEJIANG UNIV
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