Blasting demolition method of buildings with hollow wall body and brick-concrete structure

Abstract

The invention discloses a blasting demolition method of buildings with a hollow wall body and a brick-concrete structure. The blasting demolition method comprises the following steps that: 3.8cm blast holes are formed at the hollow bricks of the wall body to be destroyed; the blast holes are cinquefoil, the hole distance between two adjacent blast holes is 24cm, the row distance of two adjacent rows of blast holes is 24cm and each explosive package is arranged at each of different hollow bricks; detonators are inserted into the explosive packages, the explosive packages are wrapped with plastic bags to prevent separation of the detonators and the explosive packages and the explosive packages are fixed in the blast holes by wires; 25g explosive is put in each explosive package at the first floor and 20g explosive is put in each explosive package at the second floor and above; and the blast cut height is determined according to collapse mode. The method is simple and easy to carry out; and constructors can master and utilize the technology in short time, thus the construction time is shortened and the cost is lowered.

Description

technical field [0001] The invention relates to a blasting demolition method for buildings, in particular to a blasting demolition method for hollow wall brick-concrete structure buildings. Background technique [0002] The brick-concrete structure building with hollow walls is a simple building that appeared in the 1970s and 1980s. This kind of brick-concrete structure building has poor earthquake resistance, and cracks have appeared to varying degrees after years of use, posing safety hazards. It is no longer suitable for living, and there are still a large number of houses of this type that need to be demolished. If manual or mechanical demolition is adopted, not only the construction period is long, but also the safety cannot be guaranteed. Because blasting demolition has the characteristics of science, efficiency, safety and civilization, it is widely used, so the method of blasting is generally used to demolish houses of this type of structure. [0003] Hollow wall b...

AI Technical Summary

Problems solved by technology

Therefore, the method of conventional drilling and blasting cannot be used for demolition. Some units in China have chosen to fill rooms with water or artificially build water-filled pools, and hang explosives in appropriate positions in the water for hydraulic blasting to demolish such buildings; The room containing water requires more standard bricks, which not only increases the cost of cleaning and transportation, but also has a large amount of water injection. The problem of water discharge after blasting has not been well solved, and the waste of water resources is serious. It has not been promoted.

[0004] It can be seen from the analysis that the above-mentioned existing demolition and blasting method for hollow wall brick-concrete structure buildings obviously has defects and deficiencies, so it is necessary to explore new technologies and improve them.

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