JPH0696918B2 - Building dismantling method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a demolition method for a building having a basement floor.

(Prior Art) Usually, the dismantling of a building having a basement is to dismantle the ground skeleton first and then dismantle the underground skeleton.

When the site of the building is large, this demolition is of course such that a demolition machine or the like is installed in the site and the demolition is performed sequentially from the ground structure.

However, there is no general dismantling method in place where the site is small, such as the city center, and buildings are built over the site, and different dismantling methods are used depending on the location conditions and the people who dismantle the site. This is the current situation.

(Problems to be solved by the invention) However, as described above, when a site such as a city center is small and a building is built over the site, different dismantling methods are used depending on the location conditions and persons who dismantle the site. However, under such location conditions, it is extremely difficult to dismantle both the above-ground structure and the underground structure. In particular, dismantling of the underground structure is extremely difficult and extremely difficult, and it is dangerous and extremely dangerous. There was a problem that it cost money.

The present invention has been made in view of the above problems, and an object thereof is a building with an underground structure, and a site is narrow, and when dismantling a building that is built on a full site, particularly underground The skeleton can be easily disassembled in a short period of time,
It is to provide a method of dismantling a building that can be dismantled safely and economically.

(Means for Achieving the Object) The object of the present invention to achieve the above objects is to dismantle a building according to the present invention, in which after dismantling an above-ground structure of a building having a basement, the central part of the underground structure is used as a basis. The construction is characterized by constructing a gantry on which a dismantling machine is placed by backfilling the dismantled part while backfilling the dismantled part, and backfilling while dismantling the remaining underground structure around the gantry. .

(Operation) Thus, according to the above configuration, after dismantling the ground structure, construct a gantry for mounting the dismantling machine in the central part of the underground structure, place the dismantling machine on the gantry, and dispose the surrounding structure. It is possible to easily dismantle the underground structure even in a small site by disassembling the remaining underground structure of the part and backfilling it sequentially.

(Example) Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a method for disassembling a structure according to the present invention.

[Demolition of the above-ground structure] The building in this example is a reinforced concrete building A having a basement floor, and is built over the entire site.
Moreover, the parent piles for mountain retaining n are buried along the boundary line m between them.

First, the above-mentioned ground structure 1 of the building A is first disassembled. This is disassembled by an ordinary general method.

And after dismantling this ground structure 1, the boundary line m with the next
Check the buried parent piles n along.

[Construction of gantry] Next, after dismantling the ground structure 1, the center part of the underground structure 2 is dismantled to the foundation, but this disassembly range needs to be confirmed in advance by structural calculation.

Then, when the central portion of the underground structure 2 is dismantled, the position of the existing support piles placed in the ground is confirmed, and a round steel or the like is welded to the position display.

Next, an abdomen 3 is installed on the upper part of the main pile n, and a beam 4 is laid on the parent pile n to support the mountain stop wall M, and the dismantling machine 5 is refilled by refilling the dismantled part of the underground structure 2. The gantry 6 to be placed is constructed. In this case, the girder 4 is a gantry 6
It is buried about 50 cm inside.

[Dismantling of Underground Structure] Next, after constructing the gantry 6 in the central portion of the underground skeleton 2, the dismantling machine 5 is placed on the gantry 6 and the remaining underground skeletons around the gantry 6 are dismantled by the dismantling machine 5. To do.

In this dismantling, as shown in FIG. 2, the remaining underground skeleton body 2a is subdivided, and when one of the subdivisions is dismantled by the dismantling machine 5, it is immediately backfilled and this is repeated sequentially.

If the existing horizontal sheet pile is corroded during this dismantling, replace it with a new one one by one, and if there are existing support piles, weld the round steel etc. in the same way as above and display the position. deep.

In addition, cement is mixed in the backfill soil to be backfilled in the dismantling section.

In this way, by substituting the subdivided residual substructure 2a sequentially and repeating the backfilling operation, the substructure 2 is entirely replaced with the backfill soil.

Then, when this is all finished, the parent pile n is pulled out to dismantle the mountain stopper, and the support pile is pulled out in accordance with the position indication to make the same vacant lot as before construction.

(Effects of the Invention) The present invention has the following effects by having the above-mentioned configuration.

After dismantling the ground structure of a building with a basement floor, dismantling the central part of the basement structure to the foundation part, constructing a demolition machine gantry by backfilling the demolition site, By backfilling while dismantling the underground skeleton, the underground skeleton can be safely and easily dismantled even in a small site, and the construction period can be shortened and the construction cost can be reduced.

Reconstruction work can be treated as if it were a new construction along with the cost estimation method, and can be clarified simply.

Since the position of the existing support pile can be accurately grasped, it can be easily pulled out.

Normally, it is difficult to dismantle the ground and underground separately in a building with a small site and a full site, so the ground part is dismantled and the underground part is backfilled as it is. And can be dismantled independently.

[Brief description of drawings]

1 is a cross-sectional view of the state where the upper skeleton is dismantled, the same and is a sectional view of the state where a part of the underground skeleton is disassembled to form a gantry, and FIG. 2 is a plan view of the state where the upper skeleton is disassembled,
FIG. 3 is a plan view showing a state in which an upper frame is disassembled and a gantry is constructed. In the figure, A: Building 1: Ground frame 2: Underground frame 5: Demolition machine, 6: Frame.

Claims (1)

[Claims] 1. Dismantling the above-ground structure of a building with a basement floor, and then dismantling the central part of the underground structure to the foundation part,
A method for demolishing a building, which is characterized by constructing a gantry on which a demolition machine is placed by backfilling the demolition site, and by backfilling while dismantling the remaining underground structure around the gantry.