Seabed foundation pit blasting excavation underwater shock wave protective method and device

A protective device and shock wave technology, applied in blasting and other directions, can solve problems such as bamboo tube rupture, secondary hazards, and adverse effects of foundation pits

Active Publication Date: 2020-10-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the device is bulky and difficult to construct, and is not suitable for large-scale use, and may cause the bamboo tube to rupture during the protection process, thereby causing secondary hazards
[0005] The above schemes are generally set up for specific static protection objects, but there are still threats to the safety of marine organisms and construction personnel; and the reflection of shock waves behind bubble curtains or ordinary protective walls is likely to cause disadvantages to the foundation pit after excavation influences

Method used

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  • Seabed foundation pit blasting excavation underwater shock wave protective method and device
  • Seabed foundation pit blasting excavation underwater shock wave protective method and device
  • Seabed foundation pit blasting excavation underwater shock wave protective method and device

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Embodiment 1

[0037] A shock wave protection device in seabed foundation pit blasting and excavation water, the protection device includes a flexible protective wall 1, a bottom section steel 2, and a bubble curtain device, and the bubble curtain device includes an air compressor, a steel pipe with holes 3 and a high-pressure gas pipe 4, the The flexible protective wall 1 includes a protective panel 5, a protective steel mesh 6, a spring 7 and a connector 8, and the protective panel 5 includes a layer of open-cell polyurethane foam panel 9, two layers of neoprene interlayer 10 and an air interlayer 11. Both sides of the protective panel 5 are connected to the protective steel mesh 6 through the spring 7, and the entire flexible protective wall 1 is sequentially composed of the protective steel mesh 6, the spring 7, the neoprene interlayer 10, and the air interlayer 11 from the outside to the inside. , neoprene interlayer 10, open-cell polyurethane foam panel 9, spring 7 and protective steel ...

Embodiment 2

[0045] The blasting excavation project of an offshore wind power pile foundation is located in the coastal area, the water depth is 30m, and the covering layer is 10-30m thick. According to the engineering requirements, after the pilot shaft is mechanically excavated, the wind power pile foundation pit with a diameter of 8m is expanded under the overburden by blasting method, and the foundation pit is 15m deep into the rock foundation. Such as figure 1 — Figure 4 As shown, the shock wave protection method in the seabed foundation pit blasting excavation water, the specific steps are as follows:

[0046] (1) Determine the layout position of the protective device according to the plane size of the foundation pit. In this project, the diameter of the foundation pit is 8m, and the diameter of the protection area on the plane is 2m larger than the diameter of the foundation pit, taking 10m, as figure 2 shown; on the vertical plane, it is the area from the top of the covering l...

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Abstract

The invention discloses a seabed foundation pit blasting excavation underwater shock wave protective method and device. The method comprises the steps that (1) the position of a protective device is positioned according to the size of a foundation pit; (2) a flexible protective wall is manufactured and comprises a protective panel, protective reinforcement fabrics, springs and connection pieces, and the protective panel comprises a holed polyurethane foam panel, a chloroprene rubber interlayer and an air interlayer; (3) a protective device is installed and comprises the flexible protective wall, bottom shape steel, holed steel pipes and high-pressure air pipes, the lower portion of the flexible protective wall is connected with the bottom shape steel, the outer side of the bottom shape steel is connected with the holed steel pipes, the holed steel pipes communicate with the high-pressure air pipes, and the flexible protective wall is tied into a whole through ropes; and (4)a bubble curtain is formed through air inflation. According to the seabed foundation pit blasting excavation underwater shock wave protective method and device, the flexible protective wall and the bubble curtainare combined, effective reduction of underwater shock waves can be achieved close to a blasting zone, construction staff, marine organisms, the surrounding aquatic environment and underwater buildings are protected, meanwhile, through the absorption effect of the protective panel on the shock waves, shock wave reflection is reduced, and a foundation pit is protected.

Description

technical field [0001] The invention relates to the technical field of engineering blasting, in particular to a shock wave protection method and device in seabed foundation pit blasting excavation water. Background technique [0002] In recent years, submarine foundation pit blasting excavation technology has been widely used in offshore wind power, bridge and other construction projects. The underwater shock wave generated during blasting construction will inevitably cause harm to construction personnel, marine organisms, surrounding aquatic environment and underwater structures. [0003] In the protection of shock waves in water, the methods currently used include: bubble curtain technology and setting up explosion-proof walls. Bubble curtain technology is to form a rising and dense bubble curtain by passing high-pressure gas between the blasting area and the protected object, and use the wave impedance mutation between the media to hinder the propagation of shock waves i...

Claims

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Application Information

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IPC IPC(8): F42D5/045
CPCF42D5/045
Inventor 陈明熊峻巍卢文波王高辉严鹏
Owner WUHAN UNIV
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