Blasting Demolition Method of Reinforced Concrete Arch Bridge

Abstract

The invention discloses a blasting demolition method of a reinforced concrete arch bridge. The method includes: setting a plurality of blast holes at the arch top, the left arch foot and the right arch foot of the main arch of the arch bridge; placing explosives in each blast hole; respectively setting first delay nonel detonators in the blast holes at the arch top, the left arch foot and the right arch foot, setting second delay nonel detonators outside the blast holes, and connecting the first delay nonel detonators with the second delay nonel detonators in a cluster manner; performing main arch safety protection; detonating the arch top, and detonating the left arch foot and the right arch foot in a delayed manner so as to complete blasting demolition of the arch bridge. The method is reasonable in blast hole distribution, harmful effect of reinforced bridge blasting demolition is reduced effectively, intactness of peripheral to-be-protected object and personal property safety can be guaranteed by the protecting measure taken on the arch bridge, potential hazard of safety accidents can be prevented, cleaning is facilitated due to the fact that blasting slag piles in a concentrated manner, and environmental pollution is reduced effectively.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a blasting demolition method for reinforced concrete arch bridges. Background technique [0002] Reinforced concrete arch bridges are widely used in road construction in modern society. As time goes by, a large number of early reinforced concrete arch bridges have become dangerous bridges due to various reasons and need to be demolished. Due to the great potential safety hazards of manual and mechanical demolition, controlled blasting is generally used at home and abroad to demolish them. Blasting is a safe, reliable and fast way to demolish bridges. Safety factors such as blasting vibration, flying rocks, bridge structure and many other aspects must be strictly controlled. In the past, most of the demolition of reinforced concrete arch bridges was carried out by hydraulic blasting. However, when the bridge itself is already a dangerous bridge, the use of hydraulic blasting in...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned disadvantages in the prior art that the blasting demolition of reinforced concrete arch bridges by hydraulic blasting is a relatively large potential safety hazard, and at the same time domestic experience in successful blasting of single-hole long-span reinforced concrete arch bridges is less. , to provide a blasting demolition method for reinforced concrete arch bridges with convenient operation, high safety and less environmental pollution

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