CN102852344A - Construction method for dismounting high-rise cast-in-place concrete building - Google Patents

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

A kind of high-rise cast-in-situ concrete building demolition job practices

Technical field

The invention belongs to the demolishing buildings technical field, be specifically related to a kind of high-rise cast-in-situ concrete building demolition job practices.

Background technology

Projects has three kinds of forms such as demolition blasting, mechanical removal and manual demolition usually, the demolition blasting mode has removes that efficient is high, the duration is short, social influence is large, the attention rate advantages of higher, but the simultaneous risk is high, coordinate difficulty large, surrounding enviroment are required the shortcoming such as height.Usually in the situation that Government-Leading, surrounding enviroment better, coordinate the difficulty less, easily cause that media and the masses pay close attention to and adopt, in the comparatively harsh business district, city of condition, relatively less employing; Manual demolition, because the workman utilizes small mechanical equipment to remove, strong adaptability is applicable to any place situation, shortcoming is that work efficiency is low, long in time limit, expense is high, labour protection and safety management requirement are high; Mechanical removal, long-armed tear open building machine (long-armed hydraulic shear) remove now comparatively general in remove in the city, mainly for median low structure, according to incompletely statistics, after floor surpasses 28m, do not allow big machinery to go upstairs, can only cooperate to finish dismounting work by artificial and small-sized machine.When highrise building is removed, because the gravity of big machinery self is far longer than the former design holding capacity of floor, when big machinery was removed operation at high-storey, meeting can not bear its gravity because of floor and service load caves in, and causes casualties and mechanical failure.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of city, safe and reliable high-rise cast-in-situ concrete building machinery Demolition Construction method not using demolition blasting and manual demolition.

In order to solve the problems of the technologies described above, the invention provides a kind of high-rise cast-in-situ concrete building demolition job practices, may further comprise the steps:

(1) when tearing building machinery open remove operation in floor, the load to building structure applies carries out the safety checking computations to its supporting capacity; From floor to be onstructed down, arrange between the contiguous floors and shore structure, the described structure of shoring holds out against respectively upper and lower floor; Required layout is shored the number of floor levels of structure and is shored quantity and the installation position of structure, is determined by the data that described safety checking computations obtain;

(2) setting up of the upper and lower passage of building of protective equipment, and construction material and lower waste residue passage;

(3) tear broken-up and hanging and assembling and the debugging of building machinery open;

(4) tear building machinery open floor is carried out demolition reduction; When floor is removed, sprinkled water synchronously in the position of removing;

According to above-mentioned construction sequence from top to bottom layering remove floor; The waste residue passage slag that falls under when removing, utilizing; Dregs in time transports out of.In step (1), need to build the number of floor levels of shoring structure and calculate gained according to floor supporting capacity data, by shoring the setting of structure, the mode of multi-layer construction structure approximate " stack " is combined, compare singlestory building structure (particularly floor), its supporting capacity has obtained greatly strengthening, avoid because the building structure supporting capacity is not enough, cause tear open building machinery in construction because of reason generation security incidents such as flooring cave in, for big machinery provides a safe and reliable working platform when highrise building is removed work; Lower waste residue passage in the step (2) is so that the waste residue that the dismounting floor produces in time transports out of, and the waste residue that has reduced upper strata floor dismounting generation is deposited in the active force that on lower floor's floor lower floor's floor is produced; Broken-up and hanging and assembling and debugging to tearing building machinery open in the step (3) are to begin operation from top layer for convenient upstairs in the medium-and-large-sized mechanical energy of whole dismounting work, also can be by other hanging methods the whole disposable top layer that hangs on building of building machine of tearing open; Tearing open when building machinery is removed floor in the step (4) and sprinkle water synchronously, is when preventing from constructing, and the excessive contaminated environment of airborne dust has also avoided airborne dust to affect staff's normal operation simultaneously.

Compared with prior art, the present invention accepts ground with the gravity of big machinery (long-armed building machine, the large excavator of tearing open) from floor by shoring structure (wood supports, hydraulic pressure is shored, steel beam structure), the supporting capacity of multilayer floor is stacked up, for big machinery provides safe operating environment, solved the difficult problem that big machinery can not be removed high-rise building, because the work of big machinery, removing with respect to artificial or small-sized machine provides operating efficiency greatly, has shortened the duration; Set up between contiguous floors and shore structure, can realize support to big machinery by the supporting device two ends being held out against floor, whole working procedure is simple, and is with low cost; The arranging of construction material passage and lower waste residue passage solved the timely transportation of entering of machinery and waste residue.

As the further restriction of technical solution of the present invention, in order to increase the safety of big machinery, can adopt orderly release when in described step (4), floor being removed, order is floor, nonbearing wall, beam, load bearing wall, post successively.

The specific embodiment

The invention provides a kind of high-rise cast-in-situ concrete building demolition job practices, may further comprise the steps:

(1) when tearing building machinery open remove operation in floor, the load to building structure applies carries out the safety checking computations to its supporting capacity; From floor to be onstructed down, arrange between the contiguous floors and shore structure, the described structure of shoring holds out against respectively upper and lower floor; Required layout is shored the number of floor levels of structure and is shored quantity and the installation position of structure, is determined by the data that described safety checking computations obtain;

(2) setting up of the upper and lower passage of building of protective equipment, and construction material and lower waste residue passage;

(3) tear broken-up and hanging and assembling and the debugging of building machinery open;

(4) tear building machinery open floor is carried out demolition reduction; When floor is removed, sprinkled water synchronously in the position of removing;

According to above-mentioned construction sequence from top to bottom layering remove floor; The waste residue passage slag that falls under when removing, utilizing; Dregs in time transports out of.

Embodiment one:

Before carrying out mechanical removal, around main building, set up in advance double construction guard fender and walkway frame, the building body is formed closed.At first water waters floor and the body of wall of floor, when preventing from constructing, and the excessive contaminated environment of airborne dust; Adopt again small-sized machine to be (3 * 4) m in two sizes of the strong supporting location cutting of each layer ²Otch (can consider to adopt elevator shaft), at otch chute, hoist engine are installed again, make it form up and down up and down transport passage for transporting of waste passage and facility.

Behind lower channel on the protection of finishing laying necessity and waste passage and the facility, employing tear open the building machine with floor, wall, beam, post carry out fragmentation (eaves, balcony, external staircase etc. in Demolition Construction easily unstability outer choose member can utilize manually first removed), fragmentation is sprayed water simultaneously; Then adopt oxygen, acetylene welder cutting reinforcing bar; Utilize at last the lower waste residue passage slag that falls, carry out the depositing dust spray in the time of scarfing cinder.After removing dregs, remove this layer scaffold, protective screening.Adopt excavator filling, the slag field of self-tipping type automobile from bottom shipment building waste to government's appointment.

Impact force when preventing that column from collapsing damages structure, and the column collapse direction should be chosen on the position of lower floor's beam or wall; The reinforcing bar of column cut-off parts is stripped out, the structure muscle of reciprocal reinforcing bar and both sides is cut off, break to collapse direction.Rum point arranges building waste or straw bag, carries out the buffering precautions against earthquakes.

Above-described only is preferred embodiment of the present invention, should be understood that for a person skilled in the art, not breaking away under the prerequisite of the present invention, can also make some distortion and improvement, these can not affect effect of the invention process and practical applicability.

Claims (2)

1. high-rise cast-in-situ concrete building demolition job practices is characterized in that: may further comprise the steps:

(1) load that building structure is applied when tearing building machinery open remove operation in floor carries out the safety checking computations to its supporting capacity; From floor to be onstructed down, arrange between the contiguous floors and shore structure, the described structure of shoring holds out against respectively upper and lower floor; Required layout is shored the number of floor levels of structure and is shored quantity and the installation position of structure, is determined by the data that described safety checking computations obtain;

(2) setting up of the upper and lower passage of building of protective equipment, and construction material and lower waste residue passage;

(3) tear broken-up and hanging and assembling and the debugging of building machinery open;

(4) tear building machinery open floor is carried out demolition reduction; When floor is removed, sprinkled water synchronously in the position of removing;

According to above-mentioned construction sequence from top to bottom layering remove floor; The waste residue passage slag that falls under when removing, utilizing; Dregs in time transports out of.

2. the cast-in-place frame of high level according to claim 1 is cut building big machinery Demolition Construction method, it is characterized in that: the order to the dismounting of floor in described step (4) is floor, nonbearing wall, beam, load bearing wall, post successively.