Steel-concrete structure slag stop wall shallow hole loosening blasting demolition method

Abstract

The invention discloses a shallow hole blasting demolition method for a slag retaining wall of a steel-concrete structure, which comprises the following steps: 1) cleaning the slag retaining wall of a steel-concrete structure to form a blasting free surface, 2) blasting and layering the slag retaining wall, 3 ) Rock drilling and perforation (drilling operation), 4) Setting the value of the resistance line, 5) Calculating the single-hole charge, 6) Blast hole charge and blockage, 7) Defining the initiation method and network, 8) Blasting safety Technical verification, 9) implementation of safety technical measures, 10) verification of initiation and blasting effects; shallow hole loosening blasting method is adopted for blasting demolition, combined with mechanical crushing to complete auxiliary work; blasting demolition of steel-concrete structure slag retaining wall should be top-down The next layer is carried out: the first layer blasts off the eaves and part of the main wall, the second layer mainly blasts off the main wall, and the third layer blasts off the bottom plate and the rest of the main wall. The invention is safe, efficient and has good economic benefits, and can provide reliable method support for blasting demolition of steel-concrete structure slag retaining walls such as steel slag in steel mills.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting and steel-concrete structures, and in particular relates to a shallow hole loosening blasting demolition method for a slag retaining wall of a steel-concrete structure. Background technique [0002] Reinforced concrete structure, that is, steel-concrete structure, is a common form of building structure. In recent years, with the continuous development of my country's economy, a large number of steel-concrete structures need to be demolished. Commonly used demolition methods for steel-concrete structures include manual demolition, mechanical demolition, and blasting demolition. Among them, the manual demolition method has high cost, low safety, long construction period, and the mechanical demolition method has a small scope of application, and long-term construction is prone to noise pollution. The applicability of the two is limited, and the blasting demolition method shows high appl...

AI Technical Summary

Problems solved by technology

[0006] Objective: In order to overcome the blank research on blasting demolition method of steel-concrete structure slag retaining wall in the prior art, the blasting demolition of steel-concrete structure is prone to accidents and secondary economic losses and other technical defects, the present invention provides a steel-concrete structure retaining wall The shallow hole loosening blasting demolition method of slag wall can effectively guide the demolition of old slag retaining walls in steel mills, coal yards and metallurgical factories, and protect the personal and property safety of operators to the greatest extent

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