JPH11148235A - Rebuilding method for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently rebuild an undeground structural part by integratedly installing steel column through a floor structural part of the underground structural part, functioning the floor structural part as a shore strut, and successively achieving the rebuilding from the prescribed underground floor. SOLUTION: A steel column 4 is installed through a floor structural part 7 of an underground structural part A1, the steel column 4 is integrated with the floor structural part 7, and the rebuilding is successively achieved from the prescribed underground floor part in a condition where the floor structural part functions as a shore strut H. A part of a waste concrete 11 generated in demolishing an existing building A is filled in a pit part 9, and the concrete K is filled in cavities for integration. Reinforcements are installed on an upper part, the concrete K is placed thereon to form a new foundation structural part 3c integrated with the existing foundation structural part 3. In a stand pipe 12, only a pipe body 13 located on a lower end part is embedded, and a plurality of rest of pipe bodies 13 are erected through a connection part 14 after the embedded pipe body 13 is stably supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an underground structure, which is constructed by using pre-installed shafts which can be loaded in the middle of the construction process. The present invention relates to a method of rebuilding a building for rebuilding a structural part, and more particularly to a method of rebuilding a building having an underground structural part.

[0002]

2. Description of the Related Art Conventionally, as a method of rebuilding a building of this kind, as shown in FIG. 6, a timber pillar 4 is installed so as to penetrate a floor structure 7 of an existing underground structure A1. The existing floor structure 7 and the existing columns 8 are dismantled from the upper part of the underground structure A1 in a state where the floor structure 7 and the straight pillar 4 are not integrated, and then the new floor structure 7 is removed. (See FIG. 7). At this time, the new floor structure 7 is formed integrally with the straight pillar 4 (see FIG. 8). For example, until the strength of the floor structure 7 in the upper layer portion is developed, It is supported by a pipe support, and after the strength is developed, is supported by the straight pillar 4. Then, the same process was sequentially repeated toward the lower layer to rebuild the underground structure (corresponding to a so-called reverse striking method).

[0003]

According to the above-mentioned conventional method for rebuilding a building, during the curing period of the new floor structure, the pipe extends between the new floor structure and the existing floor structure under the new floor structure. Although a support tool such as a support is installed, the existing floor structure is supported by the existing pillars underneath, so during the curing period, dismantling work for lower layers is performed. It becomes difficult. as a result,
According to the conventional method of rebuilding a building, there is a problem that the rebuilding process of the underground structure tends to be long, and it is desired to shorten the construction period.

Accordingly, it is an object of the present invention to provide a method of rebuilding a building capable of solving the above problems and shortening the process of rebuilding an underground structure.

[0005]

According to a first aspect of the present invention, there is provided a method of rebuilding a building having an underground structure A1 as shown in FIGS. After the straight pillar 4 is installed so as to penetrate the floor structural part 7, and the straight pillar 4 and the floor structural part 7 are integrated, and then the floor structural part 7 is made to function as a cutting beam H. so,
The building is to be rebuilt sequentially from a predetermined basement floor.

As shown in FIGS. 2 to 5, the feature of the second aspect of the present invention is that the trussed pillar 4 is an existing underground structure A
It is located upright on the first basic structure 3.

A feature of the invention according to claim 3 is that, as exemplified in FIGS. 2 to 5, the side wall 6 of the existing underground structure A1 is used as a mountain buckle.

[0008] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

According to the first aspect of the present invention, a straight pillar is installed so as to penetrate the floor structure of the underground structure, and the straight pillar and the floor structure are connected to each other. After unifying, in the state where the floor structure part is functioning as a cutting beam, since the rebuilding is performed sequentially from a predetermined basement floor portion, the existing floor structure part is in a state supported by a straight pillar, Even if an existing pillar is dismantled, its support state can be maintained. Therefore, for example, when the conventional reverse striking method is carried out, the newly formed support of the floor structure at the time of curing (for example, support using a support tool such as a pipe support) is replaced with the existing floor structure under the support. The existing pillars that supported the existing floor structure can be dismantled even if the support is being carried out while securing the supporting capacity of the section,
During the curing period of the new floor structure, another series of work can be performed without waste, and the work of rebuilding the underground structure can be performed more efficiently. Further, the method is not limited to the rebuilding method using only the reverse driving method. For example, a so-called forward driving method in which the rebuilding work is sequentially performed from the lower portion of the underground structure to the upper layer, or the reverse driving method is further performed. By using together with the continuous construction method, the work efficiency of rebuilding the underground structure can be further improved, the construction period can be shortened, and the selectivity of the rebuilding method can be improved. Through these operations, the floor structure functions as a girder, so that the retaining wall of the existing building and the underground wall can be effectively used without forming a new retaining wall. It is possible to proceed with the rebuilding work. This also makes it possible to shorten the entire building rebuilding work process.

According to the characteristic configuration of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, in addition to the above-mentioned structure, the straight pillar is provided on the foundation structure of the existing underground structure. Since it is erected, the erected position can be easily and accurately adjusted as compared with the case of using a straight pillar provided with a root portion.

According to the characteristic structure of the third aspect of the present invention, the function and effect of the first or second aspect of the present invention can be achieved. The work of rebuilding the underground structure can be advanced without forming a new side wall, and the cost of the rebuilding process can be shortened and the cost can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

This embodiment is an embodiment of a method for rebuilding an existing building A having the existing underground structure A1 shown in FIG. 1 to a new building (for example, a megastructure structure) B shown in FIG. The underground structure A1
Since the high confined water layer 10 is located in the lower ground of the above, if the existing building A is demolished as a whole, the building load on the foundation ground portion that has been acting until then is reduced. However, there is a high risk that the balance between the high pressure water layer 10 and the upward pressure pressure of the high pressure water layer 10 will be lost, and the base ground portion will be lifted or the swelling phenomenon will occur. Therefore, it is considered that the building can be rebuilt while preventing the rising of the foundation ground portion and the bulging phenomenon.

In the method of rebuilding a building according to the present embodiment, the timber pillar 4 is installed so as to penetrate the floor structure 7 of the underground structure A1, and the timber pillar 4 and the floor structure 7 are integrated. Thereafter, the rebuilding is performed sequentially from a predetermined basement floor portion with the floor structure 7 functioning as the cutting beam H. However, in order to make it easy to cope with the high pressurized water pressure of the high pressurized water layer 10, in the embodiment described here, a new underground structure is added to the basic structure 3 of the existing underground structure A1. A method of integrally forming the new foundation structure portion 3c of the portion B1 to effectively use the existing foundation structure, and a plurality of support piles (hereinafter simply referred to as piles) 1 in a state where resistance can be given to the pull-out force. Is installed in the ground G, a mega truss 2 is attached as a beam member over the upper end of the above-mentioned pile 1, and a timber column 4 is installed over the mega truss 2 and the foundation structure 3 of the existing underground structure A1. In addition, a method for holding down the basic structure is also used.

The existing building A is a building to be demolished, and includes an existing underground structure A1 and an existing aboveground structure A2. And the mountain retaining wall 5 used at the time of construction is left on the outer peripheral portion of the existing underground structure A1. Each of the existing underground structure A1 and the existing underground structure A2 has a plurality of floors. Each floor has side walls 6, floor structures 7, and
A pillar structure 8 is provided to extend over the upper and lower floor structures 7. The foundation structure 3 is formed at the bottom of the existing underground structure A1. Incidentally, the floor structure 7
Is composed of slabs 7a and beams 7b. Also,
The foundation structure 3 is composed of a foundation slab 3a and an underground beam 3b.
It is formed in.

In the present embodiment, the new structure B has a megastructure type structure in which the upper structure is supported by a small number of large supporting piles 1, and the upper structure is installed on the mega truss 2. . In addition, the lower structure is installed on a new underground structure B1 formed including the basic structure 3 of the existing underground structure A1.

Next, a concrete rebuilding procedure from the existing building A to the new building B will be described. [1] The upper structure of the existing building A is dismantled and a part of the concrete waste 11 generated by the disassembly is shown as long as the balance with the pressurized water pressure in the foundation structure part 3 is maintained. As shown in FIG. 2 (a), the pits 9 are filled, and at the same time, the voids in the pits 9 are filled with concrete K for integration. Then, a reinforcement reinforcing bar is installed on the upper portion and concrete K is cast to form a new foundation structure portion 3c integrated with the existing foundation structure portion 3. In these steps, a portion corresponding to the installation position of the support pile 1 is provided with a stand pipe 1 at the time of pile construction.
2 is buried at its lower end to be integrated. The stand pipe 12 is formed by connecting a plurality of pipe bodies 13. Only the pipe body 13 positioned at the lower end is buried, and the remaining plurality of pipe bodies 13 are buried in the buried pipe body 1.
After the state where the members 3 are reliably and stably supported, they are connected to each other via the connecting portions 14 and are started up to the work stage S on the ground portion. [2] After the installation of the stand pipe 12, FIG.
The support pile 1 is constructed on the ground G through the inner space as shown in FIG. The support pile 1 is formed such that its lower end portion is formed in an enlarged state, so that a larger pulling force can be secured. The support pile 1 is a new structure B
It is of course configured to be able to support [3] A plurality of mega trusses 2 are provided across the mega truss 2 and the foundation structure 3 so that the mega truss 2 can be mounted over the upper end of the ground portion of each of the support piles 1 and the mega truss 2 can prevent the foundation structure 3 from rising. The trussed pillar 4 is installed. The trussed pillar 4 is arranged and integrated in accordance with the position of the pillar arrangement part in the new underground structure B1, and is also used as a pillar of the new underground structure B1. In this state, even if the load on the building is reduced due to the dismantling of the existing building A thereafter, the above-mentioned support via the timber pillar 4 and the mega truss 2 with respect to the pushing force acting on the foundation structure 3. The balance can be achieved by the pull-out resistance of the stake 1. [4] When the upper structure of the existing structure A remains, the part is dismantled, and then, the construction of the upper structure of the new building B is started on the mega truss 2. When the load of the upper structure acts on the mega truss 2, it is possible to more efficiently counter the pushing force from the foundation structure section 3 via the straight pillar 4. Since the building load can be used effectively, the apparent load on the support pile 1 and the mega truss 2 can be reduced, and a highly economical design can be implemented. Further, in the existing underground structure A1, at the floor structure 7 where the timber pillar 4 penetrates, the timber pillar 4 and the floor structure 7 are integrated, and the underground structure A1 is At the time of disassembly, the floor structure 7 can be used as a girder against external forces acting on the side wall 6 such as earth pressure and water pressure. Then, for example, the existing structural part is sequentially dismantled from the upper floor of the underground structural part, and the reverse striking method (see FIG. 4)
To form a new structural part, or to dismantle the existing structural part sequentially from the lower floor of the underground structural part and form a new structural part by the progressive driving method (see FIG. 3), or The building is rebuilt to a new building B by a method such as a combination of the reverse driving method and the forward driving method.

According to the method of rebuilding a building according to the present embodiment, the construction work is performed while effectively utilizing the existing retaining wall 5, the side wall 6, the foundation structure 3, and even the concrete waste generated by dismantling. In addition to this, it is possible to carry out the rebuilding work of the underground structure part by freely combining the reverse construction method and the sequential construction method according to the site situation, so the curing period of the new floor structure part By performing a series of other work without waste, the underground structure can be more efficiently rebuilt, and the construction period and cost can be reduced. In addition, even if a new underground impermeable wall or a pumping well is not provided, the structural part can be rebuilt in a state where the floating of the bottom plate and the swelling phenomenon are suppressed and with high economic efficiency. Further, it can be applied to a building having no room on the site, and can be constructed in a state where the influence on the surroundings is hardly caused.

[Another Embodiment] Another embodiment will be described below.

<1> The building rebuilding method of the present invention includes:
The present invention is not limited to the form described in the above embodiment, and when the influence of the pressure of the pressurized water layer is small, for example, a measure for preventing the foundation structure from being lifted or swollen by a mega truss / supporting pile may be used together. It is not necessary. <2> The cement mixture is not limited to the concrete described in the above embodiment, and may be, for example, mortar or cement paste.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an existing building.

FIG. 2 is a cross-sectional view illustrating a method for rebuilding a building.

FIG. 3 is a cross-sectional view illustrating a method for rebuilding a building.

FIG. 4 is a sectional view illustrating a method for rebuilding a building.

FIG. 5 is a sectional view illustrating a method of rebuilding a building.

FIG. 6 is a sectional view showing a conventional method of rebuilding a building.

FIG. 7 is a sectional view showing a conventional method of rebuilding a building.

FIG. 8 is a sectional view showing a conventional method of rebuilding a building.

[Explanation of symbols]

 3 Foundation Structure 4 Vertical Pillar 6 Side Wall 7 Floor Structure A1 Existing Underground Structure H Section Beam

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Yoshihiko Kurita, Inventor 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Inside the Osaka Main Store of Takenaka Corporation (72) Inventor Eiji Okumoto Honmachi, Chuo-ku, Osaka-shi, Osaka 4-1-1-13 Takenaka Corporation Osaka Main Store (72) Inventor Kazuo Aoki 4-1-1-13 Honcho Chuo-ku Osaka City Osaka Prefecture Takenaka Corporation Osaka Main Store

Claims (3)

[Claims] 1. A method of rebuilding a building having an underground structure, comprising: installing a straight pillar in a state penetrating a floor structure of the underground structure; And rebuilding the building sequentially from a predetermined basement floor portion with the floor structure functioning as a cutting beam after the integration. 2. The method for rebuilding a building according to claim 1, wherein the timber pillar is erected on a foundation structure of an existing underground structure. 3. The method for rebuilding a building according to claim 1, wherein the side wall of the existing underground structure is used as a mountain retaining.