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Blasting demolition method for reinforced concrete water retaining cofferdam

A reinforced concrete and cofferdam technology, which is applied in blasting, construction, infrastructure engineering, etc., can solve the problems of large dosage of single hole, single detonation method, large blasting fragmentation, etc., achieve uniform crushing effect, reduce blasting dust, Controlling the effect of blasting vibration

Inactive Publication Date: 2018-06-08
GUIZHOU XINLIAN BLAST ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing blasting method has a single charge and detonation method, which has a large dosage of single hole, large blasting vibration, uneven force, large blasting fragmentation, many flying stones, large dust, and low efficiency.

Method used

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  • Blasting demolition method for reinforced concrete water retaining cofferdam
  • Blasting demolition method for reinforced concrete water retaining cofferdam
  • Blasting demolition method for reinforced concrete water retaining cofferdam

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific embodiment: as Figure 1-7 As shown, a reinforced concrete water retaining cofferdam needs to be demolished by blasting. The anchor block of the reinforced concrete water retaining cofferdam is 3 m thick, 3 m wide, and 11.25 m long; the anchor cable 6 is 15-18 m long; the bottom ring beam 4 and the middle The ring beam 3 has a thickness of 1.2 m and a width of 0.8 m. The main reinforcement of the ring beam is 7 Φ32mm steel bars, and the stirrups are Φ12mm steel bars with a spacing of 200 mm. The top ring beam 1 is 2.1 m wide and 0.5 m thick. The main reinforcement of the ring beam is 16 Φ32mm steel bars, the stirrups are Φ12mm steel bars, and the spacing is 250 mm. 4 distribution bars are Φ20mm steel bars. The anti-seepage pile 2 is a reinforced concrete structure of Φ950 mm, the center is a steel bar of Φ114 mm, the width of the reinforcement cage is 400 mm, and the length is 780 mm. Tw...

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Abstract

The invention relates to blasting demolition method for a reinforced concrete water retaining cofferdam, and belongs to the technical field of blasting engineering. The method includes the steps of 1)arranging, and drilling blastholes of a seepage-proofing pile, a top ring beam, a middle ring beam, a bottom ring beam and an anchor block; 2) charging; 3) arranging a blasting network and detonationmethods; 4) blasting and the like. Various detonation methods are adopted, and blasting demolition can be safely and efficiently conducted on the reinforced concrete water retaining cofferdam; various charging methods are adopted, blasting energy can be effectively utilized, crushing effects are smaller, and lumpiness is smaller; segmentation arrangement of the blastholes is adopted to reduce single-hole dose, blasting vibration, blasting flying stones and water-hammer waves are effectively controlled, and blasting dust is reduced; steps are simple, operation is easy, and the method is suitable for large-area popularization and application.

Description

technical field [0001] The invention relates to a blasting demolition method for a reinforced concrete water retaining cofferdam, belonging to the technical field of blasting engineering. Background technique [0002] In the construction of water conservancy and hydropower projects, as time goes by, a large number of reinforced concrete water retaining cofferdams built in the early stage need to be demolished due to various reasons. Due to the great potential safety hazards of manual and mechanical demolition, controlled blasting is generally used at home and abroad to demolish it. Blasting is a safe, reliable and fast way to demolish reinforced concrete water retaining cofferdams. However, safety factors such as blasting vibration, blasting flying stones, and water shock waves must be strictly controlled in the blasting of reinforced concrete water retaining cofferdams. The existing blasting method has a single way of charging and detonating, and the single hole has a larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/02E02D19/04
CPCF42D1/00E02D19/04F42D3/02
Inventor 陶铁军任少锋赵明生李富国余超李杰余红兵周建敏康强
Owner GUIZHOU XINLIAN BLAST ENG GRP
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