JP2010090674A - Rebuilding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a construction term of a new building, while securing passage in an underground passage. <P>SOLUTION: This rebuilding method is a method of rebuilding an existing building 2 including the underground passage 1 into the new building under the condition where the passage is secured in the underground passage 1. In the method, a passage frame member 6 having a suspension-supportable strength is assembled in an inside of the existing underground passage 1, an inner space part is secured as an underground passage space V, a permanent sub-structural column P is driven into the underground to support a ground part of the new building provided in an upper part of the underground passage 1, an existing building portion positioned in the upper part of the underground passage 1 is removed, construction of the ground part is progressed to a state of supporting a load by the permanent sub-structural column P, the passage frame member 6 is suspension-supported with a reaction force on the ground part, and an existing building portion remained in the under part of the passage frame member 6 is removed to be rebuilt into the new building. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rebuilding method for rebuilding an existing building including an underground passage into a new building in a state where passage of the underground passage is ensured.

Conventionally, as this type of rebuilding method, as part of the foundation reinforcement work for an existing building, a working box culvert (equivalent to an underground passage) is formed at the bottom of the existing building, and this box culvert is used to There was a thing which performs foundation reinforcement (for example, refer to patent documents 1).
However, according to this conventional technique, it is not necessary to use the underground passage provided in the existing building, but it is necessary to construct a new underground passage as the upper construction work is carried out, and the construction period tends to be long. There is a problem that the cost tends to be high.
Moreover, although it is widely known among those skilled in the art, since there is no patent document or the like that has been mentioned in detail regarding the corresponding “reconstruction method”, prior art documents cannot be shown, but an existing building including an underground passage, When rebuilding to a new building with passage of underground passages secured, the following methods are often widely implemented.
As shown in FIG. 9, when constructing a new building 3 in a site including an existing underground passage 1 such as an underground shopping area over a lateral range including the existing underground passage 1, first, the plane range of the existing underground passage 1 is set. The construction of the first phase new building 3A is started. A new underground building that will eventually become an underground passage will be constructed in the first new building 3A. After switching the passage of the existing underground passage 1 to the new underground building, the existing underground passage 1 is torn down, and the second new building 3B is adjacent to the first new building 3A and integrated with the former site. To build.

Japanese Patent Laying-Open No. 2008-13926 (FIG. 6)

  According to the conventional rebuilding method shown in FIG. 9, in order to proceed with the construction with the passage of the underground passage 1 secured, the construction of the second phase new building 3B is required while the existing underground passage 1 exists. I can't. Accordingly, since the construction of the second new building 3B cannot be started until the time when the existing underground passage 1 can be demolished by switching the traffic to the new underground passage 5, there is a problem that the entire construction period becomes long.

  Accordingly, an object of the present invention is to provide a rebuilding method capable of solving the above-described problems and shortening the construction period of a new building while ensuring passage of an underground passage.

  A first characteristic configuration of the present invention is a rebuilding method for rebuilding an existing building including an underground passage into a new building in a state where passage of the underground passage is ensured, and can be suspended and supported inside the existing underground passage Assembling a passage frame member with sufficient strength, securing its inner space as an underground passage space, and placing a structural pillar into the ground so that it can support the ground part of a new building provided above the underground passage And removing the existing building portion located above the underground passage, proceeding with the construction of the ground portion in a state in which a load is supported by the stem pillar, and taking a reaction force on the ground portion to form the passage frame. The member is suspended and supported, and the existing building portion remaining below the passage frame member is removed and rebuilt to a new building.

According to the first characteristic configuration of the present invention, a passage frame member having a strength capable of being suspended and supported is assembled inside the existing underground passage, and the inner space is secured as an underground passage space. During the construction period, the usage state of the underground passage space constituted by the passage frame members can be continued.
In addition, since the structural pillar is placed in a state that supports the load on the ground above the underground passage, the construction is performed while supporting the load on the ground with the structural pillar while ensuring the passage of the underground passage. Can proceed. Therefore, as shown in FIG. 9, even in the case where a new building 3 is constructed over a side area including the existing underground passage 1 in a site including the existing underground passage 1 such as an underground mall, the existing underground passage 1 The construction work of the first period new building 3A excluding the plane area and the construction work of the second period new building 3B above the existing underground passage 1 can be started almost simultaneously.
As a result, it is possible to shorten the construction period of the new building as compared with the conventional one while securing the passage of the underground passage.
Furthermore, since the passage frame member is suspended and supported by taking a reaction force on the ground part, the underground passage space can be secured in a stable state. On the other hand, since the passage frame member is suspended and supported from the ground part, there is no need to leave an external support structure, and the work of demolishing the existing building around the underground passage (including the lower part) and rebuilding it to a new building is advanced. be able to. As a result, the rebuilding of the building can be promoted more efficiently.

  The second characteristic configuration of the present invention is that a protective frame for preventing demolition gall falls is formed outside the passage frame member before the removal of the existing building part located above the underground passage. .

According to the second characteristic configuration of the present invention, since the protective frame is provided, for example, even if the demolition glass falls when the existing building portion located above the underground passage is removed, the demolition glass is still underground. Direct hitting of the passage can be prevented by the protective frame.
Accordingly, the safety level of the underground passage is further increased.

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

  FIG. 2 and FIG. 1 show the building situation before and after executing the rebuilding method of the present invention. The rebuilding itself secures the passage of the underground passage 1 in the existing building 2 including the underground passage 1. In this state, the new building 3 is rebuilt.

The existing building 2 before rebuilding is an underground passage 1 in an underground shopping street as shown in FIG.
As shown in FIG. 1, the new building 3 after rebuilding is composed of a building having an underground portion and an above-ground portion formed over both sides including the new underground passage 5 in which the underground passage 1 is rebuilt. is there.
The part of the new building 3 that is formed on the plane area of the existing underground passage 1 is called the second-stage new building part 3B, and the part that is formed on the area excluding the plane area of the existing underground passage 1 Is referred to as a first new building part 3A.
Incidentally, the structure of the underground passage 1, the existing building 2, and the new building 3 is constituted by, for example, a reinforced concrete structure, a steel frame structure, a steel frame reinforced concrete structure, or another structure.

Next, the rebuilding method from the existing building 2 to the new building 3 will be described.
[1] A passage frame member 6 having a strength capable of being suspended and supported is assembled inside the existing underground passage 1, and the inner space is secured as an underground passage space V (see FIG. 3).
Incidentally, as an example of the passage frame member 6, members such as H-shaped steel and channel material are assembled in a rectangular ring shape, and the rectangular rings are arranged in parallel in the longitudinal direction of the underground passage 1, and each rectangular shape is arranged. For example, the rings may be integrally connected with a member such as an H-shaped steel or a channel material to form a rectangular cylindrical shape.
Also, on the inner peripheral surface of the rectangular cylindrical passage frame member 6 formed as described above, a decorative plate that constitutes a wall, ceiling, or floor is installed, and the inner space partitioned by the decorative plate is an underground passage It becomes space V.
[2] In order to support the above-ground part of the new building 3 provided above the underground passage 5, the structure pillar P is vertically penetrated through a substantially central portion in the width direction of the underground passage 5 to form a lower ground. It is placed inside (see FIGS. 4 and 5).
Incidentally, the construction of the construction pillar P is carried out from the ground part by, for example, the earth drill method or the reverse construction method, and in order to prevent the outflow of underground water and mud into the underground passage, In placing, as shown in FIG. 4, a guide wall W is installed in a portion from the ceiling portion of the existing underground passage 1 to the floor plate portion in a state of surrounding the outside of the installation plane position of the structural pillar P. Keep it. As a further water stoppage measure, a standpipe may be built inside.
[3] The decorative plate such as the old ceiling or wall between the outer shell portion of the existing underground passage 1 and the passage frame member 6 is removed, and a protective frame 7 for preventing dismantling of the demolition glass is provided on that portion. Form. As with the passage frame member 6, the protective frame 7 is also made of a member such as H-shaped steel or channel material, assembled into a gate-shaped frame, and the portal shape is spaced apart in the longitudinal direction of the underground passage 1. It is possible to open and arrange them side by side, and to place and configure a protective plate such as an iron plate over each gate type (see FIG. 5).
[4] The outer shell 1a located above the underground passage 1 is removed.
[5] Construction of the above-ground part of the new building 3 is advanced in a state in which a load is supported by the structural pillar P.
[6] When the first floor portion of the new building 3 is formed, a reaction force is secured on the first floor portion to suspend and support the passage frame member 6 (see FIG. 6).
[7] The outer shell portion of the underground passage 1 remaining on the outer peripheral side of the passage frame member 6 is removed, and the new building 3 is rebuilt from below.
[8] After the new underground passage 5 of the new building 3 is formed on the outer peripheral side of the passage frame member 6, the passage frame member 6 remaining inside the new building 3 is removed and switched to the new underground passage 5 (see FIG. 1). ).

According to the rebuilding method according to the present embodiment, the underground passage can be reconstructed in parallel while ensuring the passage of the underground passage, and the construction work above the underground passage is almost simultaneously with the construction work of the new building of the other part. The construction period of a new building can be shortened compared to the conventional construction.
Furthermore, since the passage frame member 6 is suspended and supported by taking a reaction force on the ground portion, the underground passage space V can be secured in a stable state. On the other hand, since the passage frame member 6 is suspended and supported from the ground part, there is no need to leave an external support structure, and the existing building part around the underground passage 1 (including the lower part) is demolished and reconstructed into a new building. It is possible to proceed with the rebuilding of the building more efficiently.
In addition, since the lower housing is approaching or in contact with the underground passage 1, there is a concern about the propagation of vibration during dismantling, but as a countermeasure, the lower housing was suspended from the first floor and excavated under the lower housing. After that, there is a method in which the lower housing is disassembled in a state where it is hung and cut off from the underground passage 1.
In addition, when the existing building portion located above the underground passage 1 is removed, for example, even if a dismantling gull or the like falls on the underground passage 1, the protective frame 7 can prevent direct hitting, and the rebuilding work can proceed more safely. It becomes possible.

[Another embodiment]
Other embodiments will be described below.

<1> The building subject to the rebuilding method is not limited to the one described in the previous embodiment. For example, before rebuilding, as shown in FIG. Even if a part of the existing building 2 is provided with the underground passage 1, or as shown in FIG. 7B, even if the existing building is constituted by the underground passage 1 only before the rebuilding. Good.
In addition, after rebuilding, a new building is formed only above the underground passage as shown in FIG. 8 (a), or an underground passage is included as shown in FIG. 8 (b). New buildings may be formed on one side and above.
As a matter of course, a new building may be constructed below the new underground passage.
<2> The passage frame member is formed by assembling the members such as the H-shaped steel and the channel material described in the previous embodiment into a rectangular ring shape, and arranging these rectangular rings in parallel in the longitudinal direction of the underground passage 1. In addition, the rectangular rings are not limited to being integrally connected by members such as H-shaped steel and a channel material to form a rectangular cylindrical shape, but may be constituted by other materials.
In short, what can be formed inside the existing underground passage 1 and that can secure the inner space as the underground passage space V is collectively referred to as a passage frame member.
<3> The target section on which the true pillar is installed is not limited to the central section of the underground passage described in the previous embodiment, but may be on the end side.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

Conceptual diagram showing a new building Conceptual diagram showing an existing building Conceptual diagram showing the rebuilding procedure Conceptual diagram showing the rebuilding procedure Conceptual diagram showing the rebuilding procedure Conceptual diagram showing the rebuilding procedure Front view showing a building of another embodiment Front view showing a building of another embodiment Front view showing conventional rebuilding method

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underground passage 2 Existing building 3 New building 6 Passage frame member 7 Protective frame P Construction pillar V Underground passage space

Claims (2)

A rebuilding method for rebuilding an existing building including an underground passage into a new building in a state in which the passage of the underground passage is secured,
Assembling a passage frame member having strength capable of being suspended and supported inside the existing underground passage, and securing its inner space as an underground passage space,
Placing a structural pillar into the ground so as to support the ground part of the new building provided above the underground passage,
Remove the existing building part located above the underground passage,
While proceeding with the construction of the above-ground part to support the load on the structural pillar,
A rebuilding method in which a reaction force is applied to the ground portion to suspend and support the passage frame member, and an existing building portion remaining below the passage frame member is removed to rebuild a new building.   The rebuilding method according to claim 1, wherein a protective frame for preventing a demolition glass fall is formed outside the passage frame member before removing an existing building portion located above the underground passage.

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