Construction method for dismounting high-rise cast-in-place concrete building

Abstract

The invention discloses a construction method for dismounting a high-rise cast-in-place concrete building. The construction method comprises the following steps of: (1) carrying out security checking calculation on bearing capability according to a load applied to a building structure when a building dismounting machine carries out dismounting operation among floors; arranging ejecting and supporting structures between the adjacent floors from a floor to be constructed to the bottom, wherein the ejecting and supporting structures are respectively ejected and fastened against an upper floor plate and a lower floor plate; and the quantity of floors in need of arranging the ejecting and supporting structures, and the quantity and the arrangement positions of the ejecting and supporting structures can be determined according to data obtained through the security checking calculation; (2) building a protection facility and erecting a passageway; (3) hoisting, assembling and debugging the building dismounting machine; and (4) crushing and dismounting the floors by using the floor dismounting machine. With the adoption of the construction method for dismounting the high-rise cast-in-place concrete building, provided by the invention, the bearing capabilities of a plurality of layers of floors are overlapped by using the ejecting and supporting structures, so as to provide the security for a large-size machine to do upstairs operation. The difficult problem that the large-size machine cannot be used for dismounting the high-rise building can be solved.

Description

technical field [0001] The invention belongs to the technical field of building demolition, and in particular relates to a construction method for demolishing a high-rise cast-in-place concrete building. Background technique [0002] Demolition works usually have three forms: blasting demolition, mechanical demolition, and manual demolition. The blasting demolition method has the advantages of high demolition efficiency, short construction period, great social impact, and high attention, but it is accompanied by high risk, difficult coordination, and damage to surrounding areas. The disadvantages of high environmental requirements. It is usually used when the government is leading, the surrounding environment is good, the coordination difficulty is relatively small, and it is easy to attract the attention of the media and the masses. It is relatively seldom used in the downtown area of ​​the city with relatively harsh conditions; manual demolition, because workers use small ...

AI Technical Summary

Problems solved by technology

[0002] Demolition works usually have three forms: blasting demolition, mechanical demolition, and manual demolition. The blasting demolition method has the advantages of high demolition efficiency, short construction period, great social impact, and high attention, but it is accompanied by high risk, difficult coordination, and damage to surrounding areas. Disadvantages such as high environmental requirements

It is usually used when the government is leading, the surrounding environment is good, the coordination difficulty is relatively small, and it is easy to attract the attention of the media and the masses. It is relatively seldom used in the downtown area of ​​the city with relatively harsh conditions; manual demolition, because workers use small mechanical equipment Demolition, strong adaptability, suitable for any site situation, the disadvantages are low work efficiency, long construction period, high cost, high labor protection and safety management requirements; mechanical demolition, long-arm demolition machine (long-arm hydraulic shear) demolition is now in the city It is more common in demolition, mainly for middle and low-rise buildings. According to incomplete statistics, when the floor exceeds 28m, large-scale machinery is not allowed to go upstairs, and the demolition work can only be completed by the cooperation of manual and small-scale machinery.

When demolishing a high-rise building, since the gravity of the large-scale machinery itself is far greater than the original design bearing capacity of the floor, when the large-scale machinery is demolishing a high-rise building, it will collapse because the floor cannot bear its gravity and working load, causing personnel casualties and mechanical damage