Demolition blasting method for large bridge

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...