Punching-free construction method for reinforced concrete frame structure blasting demolition

Abstract

A punching-free construction method for reinforced concrete frame structure blasting demolition includes following steps: (1), formulating a blasting construction scheme where determining of a blasting cut area is included; (2), making a shaped charge cutter; (3), making a protection plate; (4), mounting the shaped charge cutter; (5), mounting the protection plate; (6), covering a blasted area ofa frame column with a protection material, and using a blasting protection iron wire net to bind the outer layer firmly; (7), firing a detonator according to the blasting construction scheme formulated in the step (1) for blasting. By the punching-free construction method, troublesome processes needed for conventional punching blasting methods can be avoided; a shaped charge cutter assembly can effectively cut rebars in beams and columns and break concrete, so that pressured stability loss probability of the columns is increased greatly, load bearing capacity of the beams is lowered, and collapse and disassembly of a to-be-demounted structure can be realized more easily.

Description

technical field [0001] The invention belongs to the technical field of blasting demolition, in particular to a drilling-free construction method for blasting demolition of reinforced concrete frame structures. Background technique [0002] When the reinforced concrete frame structure is demolished by traditional punching and blasting method, the basic construction process includes the following key steps: hole layout, drilling, charging, blocking, blasting network connection, setting protection, warning, and detonation. These key steps directly affect The collapse and disintegration effects of blasting demolition, among which hole layout, drilling, charging, blocking, and blasting network connection are the most important. The traditional perforation blasting method must first determine the number and location of blastholes required for unit consumption calculation according to the specific dimensions of structural members such as beams, slabs, and columns, as well as concre...

AI Technical Summary

Problems solved by technology

Each step of these processes requires manual intervention. Under the condition of uneven levels of skilled workers, it is difficult to ensure the accuracy of network connections such as hole layout, drilling, charging, blocking, and blasting, and the current labor cost is increasing day by day. lead to an increase in construction costs

In addition, when the construction period is tight and rapid construction is required, due to the limitation of the work site and work objects, even if the number of workers can be increased, it is difficult to perform simultaneous multi-point drilling operations on beams, slabs, and columns of limited size

Images