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Demolition blasting method for large bridge

A bridge and large-scale technology, applied in the application field of bridge engineering, can solve the problems of difficult operation, heavy workload and high risk, and achieve the effect of convenient construction, small workload and good reliability.

Active Publication Date: 2015-11-25
GUIZHOU XINLIAN BLAST ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the demolition of bridges is usually carried out by manual direct demolition or erecting supports. No matter which method is used for demolition, it has the disadvantages of heavy workload, low efficiency, and high risk.
Especially for large bridges, the demolition needs to be carried out at high altitude. If manual demolition is used directly, the operation will be more difficult and dangerous

Method used

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Embodiment Construction

[0015] The present invention will be further illustrated by specific embodiments below, but the scope of protection is not limited to the content described in this embodiment.

[0016] A method for demolition of large bridges by blasting includes the following steps:

[0017] First, the bridge deck opening: use a breaking hammer on the bridge deck above the bridge pier or column to break open multiple bridge deck openings with a length × width of 1.0m × 2.0m;

[0018] Second, set up a climbing ladder: set the climbing ladder at the opening of the bridge deck to facilitate the passage of personnel and equipment;

[0019] The ladder is welded by steel pipes. The distance between the upper and lower steel pipes is 0.4m and the width is 0.5m. The length of several ladders is determined according to the height of the space at the installation position. It can be 6m, 4m, 2m, etc., and the ladder is placed on each bridge after the completion From the bottom of the surface opening to the brid...

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Abstract

The invention relates to a demolition method for a bridge, in particular to a demolition blasting method for a large bridge, and belongs to the technical field of bridge engineering application. The method comprises the following steps that firstly, an opening is formed in a bridge floor; secondly, a crawling ladder is erected; thirdly, a scaffold is erected; fourthly, a hanging basket is arranged; fifthly, a corridor and rails are erected; sixthly, drilling and powder charging are carried out; seventhly, demolition blasting is carried out; eighthly, detached objects are treated. The method has the advantages of being small in workload, high in efficiency, safe, reliable and the like.

Description

Technical field [0001] The invention relates to a bridge dismantling method, in particular to a large-scale bridge blasting dismantling method, and belongs to the technical field of bridge engineering application. Background technique [0002] As we all know, the order of demolition of bridges is in principle opposite to that of newly built bridges, namely, bridge deck auxiliary structure → base concrete and bridge deck paving layer → column bridge slab → arch upper column → arch rib → bridge abutment and auxiliary → demolition treatment. At present, bridge demolition usually uses manual direct demolition or erection of supports for demolition. No matter which method is used for demolition, it has disadvantages such as large workload, low efficiency, and high risk. Especially for large bridges, the demolition needs to be carried out at high altitude. If it is directly demolished manually, the operation will be more difficult and dangerous. Summary of the invention [0003] In ord...

Claims

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Application Information

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IPC IPC(8): E01D24/00
Inventor 池恩安赵明生魏兴乐松邹锐宋芷军王丹丹刘强
Owner GUIZHOU XINLIAN BLAST ENG GRP
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