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Demolition Method of Reinforced Concrete Beam or Column by Water Coupled Charge Blasting

A technology for reinforced concrete beams and reinforced concrete, which is applied in the field of reinforced concrete beam or column water-coupled charge blasting and demolition, can solve the problems of difficulty in charging, affecting blasting effect and safety, and difficulty in accurately spaced charging, etc. To achieve the effect of reducing the amount of medicine in a single hole, reducing the resistance of the charging, and the size of the block is small.

Active Publication Date: 2018-01-16
程大春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the technical scheme is charging the blast hole, no matter to the reinforced concrete beam or the column, when the hole depth is greater than 3m, due to the gravity of the explosive, the resistance effect of the blast hole wall, and the deformation of the explosive, it is difficult to charge the charge (especially It is difficult to achieve precise interval charging)
This affects blasting effectiveness and safety

Method used

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  • Demolition Method of Reinforced Concrete Beam or Column by Water Coupled Charge Blasting
  • Demolition Method of Reinforced Concrete Beam or Column by Water Coupled Charge Blasting
  • Demolition Method of Reinforced Concrete Beam or Column by Water Coupled Charge Blasting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A reinforced concrete beam (beam for short) needs to be demolished by blasting. Its size is 7.2m in length, and its cross-sectional width x height is 1.2m x 1.5m.

[0058] The blasting demolition steps of the beam are as follows:

[0059] 1) A PVC plastic pipe with a diameter of 38 mm and the same length as the beam is pre-buried along the central axis of the beam as a blast hole. Angle 45°.

[0060] 2) Find the blast hole opening and clean it with compressed air;

[0061] 3) Pass an iron wire traction rope in the blast hole so that both ends are outside the hole;

[0062] 4) Fill the blast hole with water, and keep the water level before the charge ends;

[0063] 5) Bind the emulsion explosive rolls with a diameter of 32mm and a length of 20cm with adhesive tape at one end of the hole outside the traction rope every 20cm, tying 15 rolls in total, and binding a detonating cord with a length of 7.0m at the same time; Pull the other end of the rope with force to drag...

Embodiment 2

[0066] A reinforced concrete beam (beam for short) needs to be demolished by blasting. Its size is 12m in length, and its cross-sectional width x height is 0.7m x 1.0m.

[0067] The blasting demolition steps of the beam are as follows:

[0068] 1) Two PVC plastic pipes with a length of 6m and a diameter of 38mm are pre-buried in sections along the beam central axis and arranged end-to-end as blastholes. The radius is 0.5m, and the bending angle is 60°.

[0069] 2) Find all blast hole openings and clean them with compressed air;

[0070] 3) Pass an iron wire traction rope through the two blastholes so that both ends are outside the holes;

[0071] 4) Fill the blast hole with water, and keep the water level before the charge ends;

[0072] 5) Tape an emulsion explosive roll with a diameter of 32 mm and a length of 20 cm at one end of the hole outside the traction rope; bind 20 rolls in a row for each blast hole; use force at the other end of the pull rope, and then drag the ...

Embodiment 3

[0075] A reinforced concrete column (column for short) needs to be demolished by blasting. Its size is 6.5m high, and the section length x width is 0.6m x 0.6m.

[0076] The blasting demolition steps of the column are as follows:

[0077] 1) A hole with a length of 6.4m and a diameter of 36mm drilled by a drilling rig along the central axis of the column is used as a blasthole, and the blasthole opens at the cross-section of the column top.

[0078] 2) Find the blast hole opening and clean it with compressed air;

[0079] 3) Fill the blast hole with water, and keep the water level before the charge ends;

[0080] 4) Bind a detonating cord and an emulsion explosive roll with a diameter of 32 mm and a length of 20 cm at one end of a hemp rope with a length of 7 m; the rolls are bound discontinuously with a distance of 30 cm, and then put the roll into the blast hole Inside, place a short rod with a length of 60mm and a diameter of 50mm horizontally at the hole of the blasthol...

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PUM

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Abstract

The invention discloses a water-coupled charging blasting demolition method for a reinforced concrete beam or column. The process that blast holes are formed along the axis of the reinforced concrete beam or column and water is poured into the blast holes is adopted, and the aims of reducing resistance of deep hole charging, achieving accurate charging, efficiently utilizing water pressure blasting energy, effectively controlling the strength and amount of vibration of blasting, blasting flyrock, air shock waves and poisonous blasting gas and reducing blasting dust are achieved. According to the method, the process is simple, operation is easy, the application range is wide, and the method is an ideal construction method for demolition of the reinforced concrete beam and column.

Description

technical field [0001] The invention belongs to the field of blasting engineering, and in particular relates to a method for demolishing reinforced concrete beams or columns with water-coupled charge blasting. Background technique [0002] For the demolition of reinforced concrete beams or columns, invented "Axial Embedded Blasting Holes for Reinforced Concrete Beams and Demolition Blasting Method" (Application No.: 201510376852.5), "Axial Embedded Blasting Holes for Reinforced Concrete Columns and Demolition Blasting Method" (Application No. : 201510383378.9) put forward the demolition and blasting technical scheme of axial pre-buried blast holes, which avoids the difficult problem of drilling in reinforced concrete and greatly reduces the consumption of blasting equipment. However, when the technical scheme is charging the blast hole, no matter to the reinforced concrete beam or the column, when the hole depth is greater than 3m, due to the gravity of the explosive, the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/02F42D1/08E04G23/08
CPCE04G23/08F42D1/08F42D3/02
Inventor 程大春叶建军明军
Owner 程大春
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