JP4947969B2 - Building construction method and construction structure using underground outer peripheral wall of existing building - Google Patents

Description

  The present invention belongs to a technical field of a building construction method and a construction structure using an underground outer peripheral wall of an existing building, which is carried out in order to construct a new building on a site where the existing building exists.

  When constructing a new building on the site where the existing building is located, after dismantling and removing all the existing buildings, a large temporary support work such as a mountain stop was installed on the site, The construction method to construct the building was performed.

  According to this construction method, all existing buildings must be dismantled and removed, which raises the cost of dismantling and removal and increases the construction period. Further, since a large temporary support work such as a mountain stop is required, there is a problem that the cost is increased and the construction period is prolonged. In addition, the waste material generated when the building is demolished becomes industrial waste, so there is a problem on the global environment.

  In view of this, various techniques for reducing the cost and shortening the construction period by reducing the amount of work for dismantling the building and the amount of temporary work have been disclosed (for example, Patent Documents 1 and 2). reference).

  In the above-mentioned Patent Document 1, (1) a construction method of a building frame using an existing building frame that uses an outer peripheral wall of an existing building frame as a retaining wall and builds an outer peripheral wall of the new building frame on the inner peripheral side thereof. (See claim 1 of FIG. 1 and FIG. 1b). (2) In addition, the outer peripheral wall of the existing building frame is used as a part of the outer peripheral wall of the new building frame, and is in contact with the inner peripheral side of the existing outer peripheral wall or while taking in the existing outer peripheral wall. The construction method of the building frame using the existing building frame for building the outer peripheral wall is disclosed (refer to claim 2 of FIG. 1, FIG. 2 and FIG. 3). (3) Further, a mountain retaining wall is constructed on the outer peripheral side of the outer peripheral wall of the existing building frame, a beam is installed between the mountain retaining wall and the outer peripheral wall, and the earth pressure received by the mountain retaining wall is borne on the outer peripheral wall. A construction method for building a building using an existing outer peripheral wall for building a new building is disclosed (see claim 3 of FIG. 1 and FIG. 4).

  In the technique according to (1), the existing outer peripheral wall is used as a retaining wall, and the outer peripheral wall of the new building frame is constructed on the inner peripheral side thereof. Therefore, the existing outer peripheral wall needs to be dismantled, and the new retaining wall This eliminates the need to construct a network and reduces the cost required for dismantling and the cost required for new construction. Moreover, since the technique which concerns on said (2) utilizes the existing outer peripheral wall as a part of outer peripheral wall of a new building frame, it becomes unnecessary to demolish the existing outer peripheral wall and to construct a new retaining wall. The cost required for dismantling and the cost required for new construction can be reduced, and the formwork for constructing the new outer peripheral wall can be omitted. Furthermore, in the technique according to (3), a new retaining wall is constructed on the outer peripheral side of the existing outer peripheral wall, a beam is installed between the retaining wall and the outer peripheral wall, and the retaining wall is constructed during the construction of the new building frame. Since the earth pressure received by the wall is borne on the outer peripheral wall, it is not necessary to install a temporary member such as a support column when a mountain retaining wall is newly constructed, and the temporary work can be simplified.

  In Patent Document 2, an existing building is dismantled while leaving its lower structure, and the lower structure of the building to be newly constructed is newly installed inside the lower structure while using the lower structure as a mountain retaining. A building dismantling / constructing method is disclosed in which an upper structure of a building to be newly constructed is newly installed above a lower structure of the existing building (see claim 1 of FIG. 1 and FIG. 1).

  The technology according to Patent Document 2 uses a lower structure of an existing building as a retaining wall and constructs an outer peripheral wall of a building to be newly constructed on the inside thereof. Therefore, it is necessary to dismantle the existing outer peripheral wall. There is no need to construct a retaining wall, and the cost required for dismantling and the cost required for new construction can be reduced.

Japanese Patent Laid-Open No. 11-62248 JP 2001-303599 A

  Each of the techniques according to Patent Documents 1 and 2 has the following problems, although a temporary effect is recognized as described above.

  Since the technology according to Patent Document 1 (1) uses the existing outer peripheral wall as a retaining wall and constructs the outer peripheral wall of the new building frame on the inner peripheral side, the underground plane scale of the new building is inevitably There was a problem that it had to be smaller than the underground floor scale of the existing building. This problem could not make effective use of the site, making it unsuitable for construction in urban areas, and possibly limiting the scale of new buildings.

  Since the technology according to Patent Document 1 (2) uses the existing outer peripheral wall as a part of the outer peripheral wall of the new building frame, the underground plane shape of the new building is inevitably shown in FIG. As shown, since it is restrained by the underground planar shape of the existing building, there is a problem that it has few variations and cannot flexibly accommodate buildings of various shapes constructed in recent years.

  The technique according to Patent Document 1 (3) ultimately needs to dismantle the existing outer peripheral wall, and a new vast mountain retaining wall must be constructed on the outer peripheral side of the existing outer peripheral wall. There was a problem that it was too uneconomical.

  Since the technology according to Patent Document 2 uses a lower structure of an existing building as a retaining wall, a new lower structure of a building to be constructed is newly installed inside the lower structure. There were almost the same problems as the related technology.

  In short, the above-mentioned conventional techniques have the above-mentioned problems, although they have the effects of reducing the amount of building demolition work and temporary work, thereby contributing to cost reduction and shortening the construction period. Therefore, further improvement is desired.

  The purpose of the present invention is to reduce the amount of building demolition work and temporary work by utilizing the underground outer peripheral wall of the existing building, thereby contributing to cost reduction and shortening of the construction period. It is to provide a construction method and a construction structure capable of constructing a new building having an underground plane scale equivalent to or larger than that of the above. In addition, a construction method and a construction structure that can construct a new building having an underground plane shape that is rich in variations without being constrained by the planar shape of the underground outer peripheral wall while using the underground outer peripheral wall of an existing building. Is to provide.

As means for solving the problems of the background art described above, the building construction method using the underground outer peripheral wall of the existing building according to the invention described in claim 1 is as shown in FIG. 1, FIG. 2 and FIG. In addition, the underground outer peripheral wall 1 of the existing building is divided into at least two vertical planes into an underground outer peripheral wall 1a used for a mountain retaining wall and a subterranean outer peripheral wall 1b to be demolished, and outside the subsurface outer peripheral wall 1b to be demolished, A new mountain retaining wall 2 continuous with the underground outer peripheral wall 1a used for the mountain retaining wall is constructed to form a synthetic mountain retaining wall 3 wider than the underground plane scale of the existing building, and the demolished underground outer peripheral wall 1b inside is dismantled Then, the underground outer peripheral wall 4 of a new building is newly constructed inside the synthetic mountain retaining wall 3.

The construction structure of the building using the underground outer peripheral wall of the existing building according to the invention described in claim 2 is as shown in FIGS. 1, 2 and 4, and the underground outer peripheral wall 1 of the existing building is a mountain retaining wall. The underground outer peripheral wall 1a to be used and the underground outer peripheral wall 1b to be disassembled are divided by at least two vertical surfaces, and the outer periphery of the underground outer peripheral wall 1b to be disassembled is continuous with the underground outer peripheral wall 1a used for the mountain retaining wall. A new mountain retaining wall 2 is constructed to form a synthetic mountain retaining wall 3 wider than the underground plane scale of the existing building , the demolished underground outer peripheral wall 1b is dismantled, and a new building is located inside the synthetic mountain retaining wall 3 The underground outer peripheral wall 4 is newly constructed.

  According to the building construction method and the construction structure using the underground outer peripheral wall of the existing building according to the present invention, the underground outer peripheral wall 4 of the new building is used by using a part 1a of the underground outer peripheral wall 1 of the existing building as a retaining wall. Since it is constructed, after all existing buildings are demolished and removed, the amount of building demolition and temporary work is reduced compared to the conventional technology of constructing a new building, thereby reducing cost and construction period. Of course, it is possible to construct a new building that is rich in variations and has an underground plane scale that is equal to or greater than that of the existing building and that is not constrained by the underground plane shape of the existing building.

  The building construction method and construction structure using the underground outer peripheral wall of the existing building according to the present invention are implemented as follows in order to achieve the above-described effects of the invention.

1A and 1B show an embodiment of a building construction method using an underground outer peripheral wall 1 of an existing building according to claim 1. In this building construction method, an underground outer peripheral wall 1 of an existing building is divided into an underground outer peripheral wall 1a used as a retaining wall and an underground outer peripheral wall 1b to be demolished by at least two vertical planes, and the demolished underground outer peripheral wall On the outside of 1b, the ground is excavated to construct a new mountain retaining wall 2 continuous with the underground outer peripheral wall 1a used for the mountain retaining wall to form a synthetic mountain retaining wall 3 wider than the underground plane scale of the existing building , After disassembling the underground outer peripheral wall 1b to be dismantled inside, the composite outer retaining wall 3 is used to newly construct the underground outer peripheral wall 4 of the new building on the inner side (claim 1). invention).

Moreover, building the building structure constructed by the construction method is on the outside of basement outer peripheral wall 1b of the dismantling, the existing new earth retaining wall 2 continuous underground outer peripheral wall 1a to be used for the earth retaining wall is built A synthetic mountain retaining wall 3 wider than the underground plane scale of the building is formed , and the dismantled underground outer peripheral wall 1b is dismantled. In addition, an underground outer peripheral wall 4 of a new building is newly constructed inside the synthetic mountain retaining wall 3 (invention according to claim 2).

The shape of basement outer peripheral wall 1 of the existing buildings according to the illustrated embodiment was the application in a square shape is not of course limited to this, can be applied to various shapes such as a circular shape. Moreover, although the shape of the newly installed mountain retaining wall 2 according to the illustrated example is substantially L-shaped, it is of course not limited to this, and the underground used for the mountain retaining wall is outside the underground outer peripheral wall 1b to be dismantled. If it is the shape surrounding the outer peripheral wall 1a and the underground outer peripheral wall 1b to be dismantled, it can be constructed in a variety of shapes.

  The underground outer peripheral wall 4 of the new building according to the illustrated example is constructed in contact with the inner side surface of the synthetic mountain retaining wall 3 composed of the underground outer peripheral wall 1a and the new mountain retaining wall 2 used for the mountain retaining wall. In addition, the said underground outer peripheral wall 4 can also be constructed | assembled with the required clearance gap S between the said synthetic retaining walls 3 as shown, for example in FIG. In this case, it is preferable to close the gap S by refilling the soil generated when the new mountain retaining wall 3 is constructed or by filling concrete.

  Various procedures of the construction method can be considered. For example, after constructing the new mountain retaining wall 2 continuous with the underground outer peripheral wall 1a used for the mountain retaining wall to form the synthetic mountain retaining wall 3, the dismantling of the underground outer peripheral wall 1b to be dismantled may be carried out. After dismantling the underground outer peripheral wall 1b to be dismantled, the new mountain retaining wall 2 may be constructed and implemented. Moreover, you may implement by performing both substantially simultaneously. In short, it is carried out by selecting as appropriate according to the form of the new building to be constructed, the structural design, the ground properties at the site, and the like.

  In addition, the plan scale of the underground outer peripheral wall 4 of the new building to be constructed is of course not limited to the example shown in the figure. It can also be carried out at or above the plane scale.

  Further, in the illustrated example, the foundation slab 1c of the existing building is used as a formwork, and the foundation slab 5 of the new building is constructed thereon. However, the present invention is not limited to this and is shown in FIG. Similarly, the foundation slab 1c can be dismantled and removed to construct a new building having a deeper depth than the existing building. In this case, the retaining wall 6 is provided on the side surface of the lower end portion of the underground outer peripheral wall 1a used for the retaining wall. The same technical idea applies to Example 2 below.

Therefore, according to the construction method and construction structures of buildings using underground outer peripheral wall of the existing buildings according to claims 1 and 2, utilizing a part 1a of underground outer peripheral wall of the existing building earth retaining wall Since the basement outer peripheral wall 4 of the new building is constructed, all existing buildings are dismantled and removed, and the amount of building dismantling and temporary work is reduced compared to the conventional technology of constructing a new building. , Can contribute to cost reduction and shortening of construction period. In addition, as described above, it is possible to construct a new building rich in variations that has an underground plane scale that is equal to or larger than the underground plane scale of the existing building and that is not constrained by the underground plane shape of the existing building.

Figure 4 shows different embodiments of the construction method and construction structures of buildings using underground outer peripheral wall of the existing buildings according to claims 1 and 2. The second embodiment is different from the first embodiment in that the underground outer peripheral wall 1a used for the retaining wall in the underground outer peripheral wall 1 of the existing building and the underground to be dismantled according to the (underground) plane shape of the new building to be constructed. The design of the part with the outer peripheral wall 1b is changed. That is, in Example 1, it implements as the underground outer peripheral wall 1b which disassembles the L-shape substantially bisected at the corner portion of the rectangular underground outer peripheral wall 1, whereas in Example 2, the rectangular underground outer peripheral wall The only difference is that it is implemented as an underground outer peripheral wall 1b that dismantles the middle part of the short piece of the wall 1.

  Therefore, according to the second embodiment, in addition to the effects similar to those of the first embodiment, compared to the first embodiment, the portion of the underground outer peripheral wall 1 of the existing building to be demolished, that is, the underground to be demolished Since the scale of the outer peripheral wall 1b is small, it is possible to further reduce the building dismantling work amount and the temporary work amount, thereby contributing to further cost reduction and shortening the construction period.

  The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated examples, and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case. In particular, the underground plane shape of the new building to be constructed is not limited to the illustrated example, and the shape of the new mountain retaining wall 3 to be constructed and the underground outer peripheral wall 1a used for the retaining wall in the underground outer peripheral wall 1 of the existing building are dismantled. According to the design change of the site | part with the underground outer peripheral wall 1b, it can implement with the shape and magnitude | size rich in a variation.

A is a top view which showed the construction method and construction structure of a building using the underground outer peripheral wall of the existing building which concerns on Example 1, B is the longitudinal cross-sectional view. A is the top view which showed the construction method of the building using the underground outer peripheral wall of the existing building which concerns on Example 1, and the variation of construction structure, B is the longitudinal cross-sectional view. It is the longitudinal cross-sectional view which showed the construction method of the building using the underground outer peripheral wall of the existing building which concerns on Example 1, and the variation of construction structure. It is the top view which showed the construction method and construction structure of a building using the underground outer peripheral wall of the existing building which concerns on Example 2. FIG.

Explanation of symbols

1 Underground outer peripheral wall of existing building 1a Underground outer peripheral wall used for mountain retaining wall 1b Underground outer peripheral wall to be demolished 1c Foundation slab of existing building 2 New mountain retaining wall 3 Composite mountain retaining wall 4 Underground outer peripheral wall of new building 5 Foundation slab of new building 6 Mountain retaining wall S Clearance

Claims (2)

The underground outer peripheral wall of an existing building is divided into an underground outer peripheral wall used for a mountain retaining wall and an underground outer peripheral wall to be demolished by at least two vertical surfaces, and is used for the mountain retaining wall outside the underground outer peripheral wall to be demolished. A new mountain retaining wall that is continuous with the underground outer peripheral wall is constructed to form a synthetic mountain retaining wall wider than the underground plane scale of the existing building, and after the demolished underground outer peripheral wall is dismantled inside, Building construction method using the underground outer peripheral wall of an existing building, characterized by building a new underground outer peripheral wall of a new building. The underground outer peripheral wall of the existing building is divided into at least two vertical planes, the underground outer peripheral wall used for the mountain retaining wall and the underground outer peripheral wall to be demolished, and is used for the mountain retaining wall outside the underground outer peripheral wall to be demolished A new mountain retaining wall continuous with the underground outer peripheral wall is constructed to form a synthetic mountain retaining wall wider than the underground plane scale of the existing building, and the underground outer peripheral wall to be dismantled is dismantled, inside the synthetic mountain retaining wall Is a construction structure of the building using the underground outer peripheral wall of the existing building, characterized by the newly built underground outer peripheral wall of the new building.

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