JP3597183B2 - Barrier-free construction method of staircase type apartment house by building outer frame - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a renovation method for an aging staircase-type apartment house, and more particularly to a low-cost renovation method that combines barrier-free and earthquake-resistant reinforcement by installing an elevator or the like.
[0002]
[Prior art]
The public housing stock in Japan is considerable. However, almost half of these public housings were constructed in the 1960s. In recent years, countermeasures against their aging, especially seismic reinforcement in response to large-scale earthquakes, have become a problem.
[0003]
In the breakdown of public housing stock, apartments with two or more floors and no elevators (hereinafter referred to as staircase apartments) account for a large percentage. In such a staircase type apartment house, a request for renovation to cope with barrier-free due to the aging of the resident is increasing very much.
[0004]
When renovating such a staircase type apartment house, it is difficult to demand a large amount of construction cost especially for an aging resident. Therefore, it is required to minimize the burden on residents by reducing the cost of renovation work. However, the staircase-type apartment house does not have an outer corridor, so it is necessary to install a plurality of elevators as it is, and in this case, the renovation work becomes expensive.
[0005]
On the other hand, in the case of seismic retrofitting of a staircase type apartment house, it is not possible to adopt a seismic retrofitting method that closes the opening, so the outer frame method of building a frame outside the building is advantageous. However, in the case of rehabilitation work that involves only seismic reinforcement, it is necessary to separately take measures to make it barrier-free.
[0006]
Here, as a conventional example of a renovation method of a staircase type apartment house, there is Japanese Patent Application Laid-Open No. 2002-129755. However, the renovation method of Patent Document 1 focuses on making the barrier stabilization possible while using the existing stairs as they are, and does not attach importance to the durability and construction cost of the aging staircase type apartment house. Most are difficult to adopt.
[0007]
[Patent Document 1]
JP-A-2002-129755, page 2 to page 6, FIGS. 1 to 4
[0008]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and an object of the present invention is to provide a low-cost renovation method that combines barrier-free and seismic reinforcement in an aged staircase type apartment house. It is.
[0009]
[Means for Solving the Problems]
(1) In the first invention, a foundation 11 is constructed on the stairs side of an existing staircase type apartment house 1, and an outer frame 2 composed of precast columns 8 and precast beams 9 is constructed on the foundation 11, A corridor 4 is newly provided between the outer frame 2 and the staircase-type apartment house 1 to integrate the staircase-type apartment house 1 with the outer frame 2. This is a barrier-free construction method for a staircase-type apartment house by constructing an outer frame, in which the staircase 5 is removed and the elevator 6 is installed or the staircase 5a is replaced in the staircase after the removal of the staircase.
(2) In the second invention, in the first invention, a foundation 11 is built on the veranda side of the existing staircase type apartment house 1, and an outer frame comprising precast columns 8 and precast beams 9 on the foundation 11 is provided. 3 is constructed, and a veranda 20 that integrates the outer frame 3 and the staircase type apartment house 1 is newly provided.
(3) In the third invention, in the first or second invention, PC steel materials 12 and 13 are inserted into the precast pillars 8 and the precast beams 9 constituting the outer frames 2 and 3, respectively. The prestress is applied to the outer frames 2 and 3 by the tension of 12, 13.
[0010]
<Action>
In the present invention, a corridor 4 is newly provided on the stairs side of the staircase type apartment house 1, and an elevator 6 is installed or the staircase 5a is replaced in the staircase room after the stairs are removed, whereby the existing staircase type apartment house 1 is replaced. Will be renovated into an apartment house 1a that is compatible with barrier-free services.
[0011]
Further, in the present invention, the outer frame 2 is provided on the stairs side of the existing staircase type apartment house 1, and the outer frame 2 bears the seismic force acting on the staircase type apartment house 1. Therefore, according to the present invention, barrier-free and seismic reinforcement of the staircase type apartment house 1 can be performed at the same time, and repair work required for the deteriorated staircase type apartment house 1 can be performed at low cost. In addition, by providing the outer frame 3 also on the veranda side of the staircase type apartment house 1 as necessary, it is possible to perform more thorough earthquake-resistant reinforcement.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a barrier-free construction method of a staircase type apartment house by constructing an outer frame will be described with reference to the drawings. FIG. 1A is a plan view of a staircase type apartment house before the construction method of the present invention, and FIG. 1B is a plan view of a staircase type apartment house 1a after the construction method of the invention. FIG. 2 is a front view showing the state of the staircase side of the staircase type apartment house 1a after the construction method according to the present invention.
[0013]
In the renovation method of the staircase type apartment house 1 of the present embodiment, the outer frames 2 and 3 are constructed on the stairs side and the veranda side of the existing staircase type apartment house 1, and the outer frames 2 and 3 and the staircase type apartment house are combined. 1 is integrated to provide seismic reinforcement. In addition, a corridor 4 is newly established between the outer frame 2 on the stairs side and the staircase type apartment house 1, and after removing the stairs 5, an elevator 6 is installed in the stairs room and the stairs 5a are replaced, and the new construction is performed. A barrier-free system is provided by providing an entrance 7a facing the corridor 4 of the building.
[0014]
The outer frames 2 and 3 of the staircase type apartment house 1 are composed of precast columns 8 and precast beams 9 which are connected to concrete precast members. The outer frames 2 and 3 are erected on both sides of the staircase type apartment house 1 on the stairs side and the veranda side, respectively. The outer frames 2 and 3 are built on a foundation 11 buried in the ground 10 along a vertical plane parallel to a wall surface of the staircase type apartment house 1. As shown in FIG. 3 and the like, the foundation 11 of the outer frames 2 and 3 may be a concrete foundation integrated with the foundation pile 11a, or may be a direct foundation if the ground is good, and may be a cloth foundation or an independent foundation. It is appropriately set according to various conditions including the above.
[0015]
The precast member 8a for the precast column 8 is provided with a beam support portion 8b for mounting the precast beam 9, so that the beam support portion 8b is positioned at regular intervals on the precast column 8 when the precast member 8 is connected. It has become. Then, the precast members 9a for the concrete beams are disposed between the beam support portions 8b of the precast columns 8, and the outer frames 2 and 3 are constructed.
[0016]
The outer frames 2 and 3 are provided with a vertical sheath that vertically passes through the precast column 8 and a horizontal sheath that crosses the precast beam 9 and the beam support portion 8b of the precast column 8. As shown in FIG. 4, PC steel materials 12 and 13 are inserted and arranged in the vertical sheath and the horizontal sheath, and the gap between each sheath and the PC steel materials 12 and 13 is filled with grout.
[0017]
Further, a steel support plate is embedded in the fixing portions of the PC steel materials 12 and 13 in the precast members 8a and 9a, and the fixing device 14 and the steel support plate attached to the ends of the PC steel materials 12 and 13 are formed. By the engagement, the PC steel materials 12 and 13 are fixed in tension and prestress is introduced into the precast columns 8 and the precast beams 9 constituting the outer frames 2 and 3.
[0018]
FIG. 5 is a cross-sectional view showing a connected state between the staircase type apartment 1 and the outer frame 2 on the staircase side. In the present embodiment, the post-installed anchor 15 that is hit at a fixed interval on the side wall surface of the staircase of the staircase type apartment house 1 and the reinforcing bar 17 that is inserted into the insert 16 that is provided at regular intervals on the outer frame 2 are provided. You are united. Then, concrete 18 is cast into the formwork on which these reinforcing bars are arranged, and a RC corridor 4 is newly provided between the staircase type apartment house 1 and the outer frame 2. Thereby, the staircase type apartment house 1 and the outer frame 2 are integrated and seismically reinforced, and the seismic force acting on the staircase type apartment house 1 is also borne by the outer frame 2.
[0019]
FIG. 6 is a cross-sectional view showing a connected state between the staircase type apartment house 1 and the outer frame 3 on the veranda side. In the present embodiment, the staircase-type apartment house 1 and the outer frame 3 are integrated by renovating the existing veranda 19 of the staircase-type apartment house and reconstructing it on a new veranda 20 made of RC. The house 1a is seismically reinforced.
[0020]
Specifically, the rising part 19a of the existing veranda 19 is dismantled, and a concrete casting hole 19b is formed on the floor surface. Further, post-installed anchors 21 are struck at regular intervals on the lower wall surface of the existing veranda 19. Further, the post-installed anchor 21 is bound via an anchor bar 22 embedded in the outer frame 3 at fixed intervals and a reinforcing bar 22a. In addition, a shear transmission metal 23 for transmitting a shearing force from the existing veranda 19 to the new veranda 20 is arranged in the concrete pouring hole 19 b of the existing veranda 19.
[0021]
Then, concrete is poured from the concrete placing hole 19b of the existing veranda 19 into the formwork on which these anchors and reinforcing bars are arranged, and a new RC veranda 20 integrated with the existing veranda 19 is provided in the staircase. It is constructed between the type apartment house 1 and the outer frame 3.
[0022]
On the other hand, as shown in FIG. 1 (b), in the present invention, the existing staircase 5 is temporarily removed to make the staircase type apartment house 1 barrier-free, and an elevator 6 is installed in the removed staircase room. I have. In addition, the slope 24 may be installed at the entrance of the staircase type apartment house.
[0023]
FIG. 7 is a view showing the staircase before the repair method is applied, and FIG. 8 is a view showing the staircase after the repair method is applied. In the apartment house 1a after the renovation method according to the present invention, the stairs 5a are replaced so as to communicate with the newly installed corridor 4 at the same time as the elevator 6 is installed. Further, in each dwelling unit 25 of the apartment house, the entrance 7 facing the existing staircase is closed, and a new entrance 7a facing the newly established corridor is provided.
[0024]
Hereinafter, the procedure of the repair method for the staircase type apartment house of the present embodiment will be briefly described.
[0025]
(1) First, after constructing a pile foundation 11a as needed outside the staircase side and the veranda side of the existing staircase type apartment house 1, construct the concrete foundation 11 integrally with the pile foundation 11a, or A concrete foundation 11 is built by laying split chestnuts or the like on the ground. Note that a vertical PC steel material 12 for the precast column 8 is embedded in the concrete foundation 11 in advance.
[0026]
(2) Then, a scaffold is assembled from the outside on the stairs side and the veranda side of the staircase type apartment house 1.
[0027]
(3) Precast members 8a, 9a for the precast columns 8 and the precast beams 9 are arranged on the concrete foundation 11, and the outer frames 2, 3 are constructed by integrating the precast members 8a, 9a.
[0028]
Specifically, first, the precast member 8a is stacked on the concrete foundation 11 so that the vertical PC steel material 12 embedded in the foundation penetrates the vertical sheath. In parallel with the construction of the precast column 8, a precast member 9a is disposed between the beam support portions 8b of the precast column 8, and the horizontal PC steel 13 is inserted and disposed in the horizontal sheath.
[0029]
Then, after the provisional arrangement of the precast members 8a, 9a, the longitudinal PC steel material 12 is tension-fixed by one pull from the capital of the precast column 8, and then the horizontal PC steel material 13 is tension-fixed. Further, the sheath is filled with grout and hardened, and the precast columns 8 and the precast beams 9 are integrated to construct the outer frames 2 and 3.
[0030]
(4) Next, a post-installed anchor 15 such as a chemical anchor is driven into a predetermined location on the side wall of the staircase of the staircase type apartment house 1, so that the finished surface of the post-installed anchor 15 is roughened. Then, a formwork for the corridor 4 is installed between the outer frame 2 on the stairs side and the apartment house 1.
[0031]
In addition, a reinforcing bar 17 is inserted into the insert 16 of the outer frame 2, and the post-installed anchor 15 provided on the outer wall of the apartment house 1 and the reinforcing bar 17 are bound and arranged in the formwork. Then, concrete 18 is poured into the formwork, a corridor 4 is newly established on the stairs side of the apartment house, and the outer frame 2 on the stairs side and the apartment house 1 are integrated.
[0032]
(5) Similarly, a post-installed anchor 21 such as a chemical anchor is driven into a predetermined location on the side wall of the veranda of the staircase type apartment house 1, and the finished surface of the post-installed anchor 21 is roughened. In addition, the rising portion 19a of the existing veranda 19 is dismantled, and a concrete casting hole 19b is formed in the floor surface.
[0033]
Thereafter, a formwork for the veranda 20 is installed between the outer frame 3 on the veranda side and the apartment house 1. Further, the anchor bars 22 embedded in the outer frame 3 and the post-installed anchor 21 provided on the outer wall of the apartment house are bound together, and the shear transmission hardware 23 is arranged in the concrete casting hole 19 b of the existing veranda 19 to form the mold. Arrange the bars in the frame. Then, concrete 18 is poured into the formwork to construct a new veranda 20 integrated with the existing veranda 19 of the apartment house 1, and the outer frame 3 on the veranda side and the apartment house 1 are integrated.
[0034]
(6) An opening for the new entrance 7a is provided on the outer wall of the staircase side of each dwelling unit 25 of the staircase type apartment house 1, and the existing entrance 7 of each dwelling unit 25 is closed. Then, in each dwelling unit 25 of the apartment house 1, the entrance 7a is constructed on the outer wall on the stairs side facing the newly established corridor 4. At this time, the interior and facilities of each dwelling unit 25 can be reformed as necessary.
[0035]
(7) Also, the existing stairs 5 cannot be used as it is because there is a gap of half a floor from the newly established corridor 4, so the existing stairs 5 were removed and the stairs in the staircase were replaced, and the new stairs 5 were installed. Build a new staircase 5a that communicates with corridor 4. Such replacement of the stairs 5a is preferably performed in two or more stair rooms to enable two-way evacuation in the renovated apartment house 1a.
[0036]
(8) In addition, an elevator 6 is installed in one of the staircases after the removal of the stairs to make the apartment house 1 barrier-free. In addition, a slope 24 may be newly provided at the entrance of the staircase type apartment house 1.
[0037]
(9) Then, the handrails 26 are installed on the newly established corridor 4 and the veranda 20, the finishing mortar work and the painting work for the corridor 4 and the like are performed, and finally the scaffold is removed to complete the renovation of the apartment house 1a.
[0038]
The embodiments of the method of the present invention have been described above, but the claims of the present invention are not limited to these embodiments. For example, when structurally sufficient seismic reinforcement is achieved only by the outer frame 2 on the stairs side of the apartment house 1a, it is not necessary to construct the outer frame 3 on the veranda side. If an elevator cannot be installed in the staircase, an elevator may be installed outside the outer corridor (both are not shown).
[0039]
【The invention's effect】
In the present invention, a corridor is newly constructed on the staircase side of a staircase-type apartment house, an elevator is installed and stairs are replaced in the staircase after removing the stairs, and an entrance facing the newly constructed corridor is provided. Therefore, the existing staircase-type apartment house can be renovated into a high-quality apartment house compatible with barrier-free facilities without a complete rebuilding.
[0040]
In the present invention, an outer frame is provided on the stairs side of the existing staircase type apartment house, and the outer frame bears the seismic force acting on the staircase type apartment house. Therefore, according to the present invention, barrier-free and seismic reinforcement of the staircase type apartment house can be performed at the same time, and the repair work required for the deteriorated staircase type apartment house can be performed at low cost. In addition, by providing an outer frame also on the veranda side of the staircase-type apartment house, it is possible to perform more thorough seismic reinforcement as needed.
[0041]
Furthermore, the refurbished apartment house according to the present invention has two stairs connected to the newly-installed corridor, so that a two-way evacuation in the event of a disaster is possible, and safety in the event of a disaster is further improved.
[Brief description of the drawings]
FIG. 1 (a) is a plan view of a staircase type apartment house before construction of the present invention, and FIG. 1 (b) is a plan view of a staircase type apartment house after construction of the present invention.
FIG. 2 is a front view showing the state of the staircase side of the staircase type apartment house after the construction method of the present invention is applied.
FIG. 3 is a front view of an outer frame on a staircase side.
FIG. 4 is a view showing a state of a precast member of an outer frame and a PC steel material.
FIG. 5 is a diagram showing a connection state between a staircase-type apartment house and an outer frame on the staircase side.
FIG. 6 is a view showing a connection state between a staircase type apartment house and an outer frame on the veranda side.
FIG. 7 is a diagram showing a staircase before construction of the method of the present invention.
FIG. 8 is a view showing a staircase after the construction method according to the present invention is performed.
[Explanation of symbols]
1,1a Staircase type apartment house 2 Outer frame (stair side)
3 Outside frame (Veranda side)
4 Corridor 5, 5a Stairs 6 Elevator 7, 7a Entrance 8 Precast pillar 8a Precast member 8b Beam support 9 Precast beam 9a Precast member 10 Ground 11 Concrete foundation 11a Foundation pile 12 Vertical PC steel 13 Horizontal PC steel 14 Fixing tool 15 Post-installation Anchor 16 Insert 17 Reinforcing bar 18 Concrete 19 Veranda 19a Standing portion 19b Concrete pouring hole 20 Veranda 21 Post-installed anchor 22 Anchor bar 22a Reinforcing bar 23 Shear transmission hardware 24 Slope 25 Dwelling unit 26 Handrail

Claims (3)

Build a foundation on the staircase side of the existing staircase type apartment house, build an outer frame consisting of precast columns and precast beams on the foundation, and provide a corridor between the outer frame and the staircase type apartment house. In addition to integrating the staircase type apartment house and the outer frame by newly installing the staircase type apartment house, removing the stairs of the staircase type apartment house, installing an elevator or replacing stairs in the staircase after removing the stairs A barrier-free construction method for a staircase-type apartment house with an outer frame, which is characterized by the following: A foundation is built on the veranda side of an existing staircase-type apartment house, an outer frame composed of precast columns and precast beams is built on the foundation, and the outer frame and the staircase-type apartment house are integrated. The barrier-free construction method for a staircase-type apartment house according to claim 1, wherein a veranda is newly constructed. The precast column and the precast beam constituting the outer frame each have a PC steel material inserted therein, and a prestress is applied to the outer frame by the tension of the PC steel material. A barrier-free construction method for a staircase type apartment house using the outer frame construction described.

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