JP2002194892A - Construction method of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a construction period by efficiently constructing a horizontal part such as a floor slab in constructing a building such as a multiple dwelling house. SOLUTION: In this construction method of the building wherein columns 1 or walls 2 are vertically erected at specified spaces and a floor slab or the like is horizontally arranged between the columns 1 or walls 2, after the preceding construction of the columns 1 or walls 2 formed with a form 6 of the same plane cross section by a jump form construction method, the form 6 is jumped up, and then the horizontal part such as the floor slab is constructed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a building, and more particularly to a method of constructing a floor or a slab between the pillars or walls efficiently after the columns or walls are previously constructed by a jump form method. It relates to a method of building a building that can do it.

[0002]

2. Description of the Related Art
When building a reinforced concrete apartment house or the like, a method of building a frame by one layer (one floor) is generally used.

[0003] This construction method is too costly and it is difficult to shorten the construction period. As a method of shortening the construction period, it is conceivable to convert columns, beams and floor slabs into precast members, but an increase in cost is inevitable.
Also, in the case of a building having multiple layers of walls (door border walls), the effect of shortening the construction period is small.

[0004] As a method of efficiently constructing a wall (door boundary wall), a method of precasting or a method of efficiently constructing, removing and replacing a form using a large system form is used. However, there are problems in that precasting increases the cost, and construction with a large system formwork does not produce a diversion effect unless it is a fairly large building.

On the other hand, a formwork is placed around the structure to be constructed, concrete is poured into the formwork, and after the concrete is hardened, the reaction force is removed by an anchor or the like buried in the concrete in advance. The jump form method that repeats the process of raising and lowering the formwork with an electric hydraulic device and reshaping the formwork with a movement like a measuring insect is exclusively used for buildings with no floor on the middle floor such as large chimneys, silos, piers, etc. It has only been constructed and has not been implemented in general buildings such as apartment houses.

Therefore, when constructing a building such as an apartment house,
The technical problem to be solved arises in order to obtain a building construction method that can greatly reduce the construction cost and significantly shorten the construction period by applying the jump form method, and the present invention The purpose is to solve the problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, in which columns or walls are vertically erected at predetermined intervals, and floors are horizontally placed between the columns or walls. In the method of constructing a building in which slabs and the like are arranged, after the pillars or walls formed by the formwork having the same plane cross section are constructed in advance by the jump form method, the formwork is jumped up, and thereafter, A method for constructing a building for constructing a horizontal portion such as the floor slab, and a method for constructing a building wherein pillars or walls are vertically erected at predetermined intervals and a floor slab or the like is horizontally arranged between the pillars or walls. In constructing the pillar or wall by the jump form method, an embedding metal fitting is installed in advance at an installation position of the floor slab with respect to the pillar or wall in accordance with the outer surface of the pillar or wall,
After casting the concrete to construct the pillar or wall, a support for supporting the floor slab plate serving as the floor slab is fixed near the lower part of the embedding metal fitting, and further, the floor slab plate is interposed between the support members. And a method of constructing a building in which pillars or walls are vertically erected at predetermined intervals and a floor slab or the like is horizontally arranged between the pillars or walls. Or, when constructing the wall by the jump form method, after setting the recess forming form in advance at the installation position of the floor slab with respect to the column or wall, and after casting the concrete to construct the column or wall,
Removing the formwork for forming the concave portion, forming a concave portion in the column or the wall, constructing a floor slab plate serving as the floor slab in the concave portion, and the floor slab plate is the column or the A building in which the floor slab is formed by using a plurality of floor slab plates which are divided in the vicinity of the center between the walls and which are erected between the receiving member or the concave portion and the support base installed near the center. Construction method, and, when installing the floor slab plate in the receiver or the recess, while hanging a sling wire near both ends of the floor slab plate, and attaching a hanging jig to one of the sling wires When suspending between the columns or walls, one of the sling wires is wound up by the suspending jig to incline the floor slab plate, and when suspended between the pillars or walls, the hanging jig is used to suspend the sling wires. A building where the floor slab is leveled while extending one side There is provided a construction method.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG. FIG. 1 is a plan view of an apartment house constructed by the RC structure, in which columns 1, 1... , 3 ..., and walls (door boundary walls) 2, 2, ... in the vertical direction in the figure of the pillars 1, 1, ..., and furthermore, the walls 2, 2, ... and the beams 3, Floor slabs 4, 4 ... are constructed in the space surrounded by 3 ... Accordingly, a mid- to high-rise apartment house having a harmonica-type structure skeleton in plan view will be constructed.

Although not shown, corridors and balconies having a predetermined width are respectively constructed outside both of the pillars 1, 1,....

As shown in FIG. 2, a jump form method is employed as a method of constructing the structural frame, and the form 6 is formed with a form frame 6 (see FIG. 3) having the same plane cross section by using jump form devices 5, 5,. .. And the walls 2, 2... Are built in advance, and then the formwork 6 is jumped up and the beams 3, which are horizontally arranged with a delay of about two layers (two floors). 3 are constructed, and the floor slabs 4, 4 are constructed horizontally.

In some cases, the vertical portion of the structural body may be constituted only by walls. In this case, the same construction method as described above is used. When the pillar 1 or the wall 2 is constructed, a receiving portion for installing the floor slab 4 is formed as described later.

Next, the jump form method will be described with reference to FIG. FIG. 3A is a cross-sectional view of a jump form device 5 installed around the outer circumference of the pillar 1 and the wall 2. A climbing mechanism 8 for climbing along the column 1 is provided on both lower sides of the jump form device 5 to raise a climbing rail (not shown) and raise the jump form device 5 along the climbing rail.

On both sides of the upper part of the jump form device 5, form frames 6, 6 of a predetermined length are provided via expansion mechanisms 7, 7 for maintaining the width and thickness intervals of the column 1 and the wall 2. I do. now,
After the first and second floor pillars 1 and the wall 2 are constructed, the third floor pillars are constructed. First, the telescopic mechanisms 7, 7 are adjusted to set the formwork 6, 6 at the position where the column reinforcing bar 9 on the third floor has been assembled, and concrete is poured between the formwork 6, 6 to make the first floor. Complete construction of the minutes pillar.

Next, as shown in FIG. 3 (b), the jump form device 5 jumps up to move to the construction of pillars for four floors. Thereafter, the horizontal portions of the beams 3 and 3 and the floor slab 4 on the second floor are constructed. In this way, the jump form method is
Unlike the method of gradually launching concrete with a small width like the conventional slip form method, for example, 3m
Since concrete of the same span is cast at a time, if the jump form method is used, columns and walls having the same cross section can be constructed in advance, and the construction period can be significantly reduced.

Further, by simultaneously constructing a plurality of columns or walls having a height at which a floor slab can be installed, the construction period can be further greatly reduced.

Next, a method of efficiently constructing the floor slab 4 between the walls 2, 2 after the construction of the columns 1, 1,... And the walls 2, 2,. I do. First, when constructing the wall 2 with the jump form device 5, an embedding metal fitting 13 having a width larger than the vertical height of the floor slab 4 is set in advance at the installation position of the floor slab 4 on both sides of the wall 2. Keep it.

The embedding metal fitting 13 is made of a steel plate, and is installed so as to be flush with the outer surface of the wall 2. Stud bolts 14, 14 having a predetermined length are fixed near both inner end portions, and concrete C is formed. When it is cast, it is integrated with the wall 2. A receiving member 16 made of an angle material for supporting a lower portion of the floor slab plate 10 serving as the floor slab 4 is fixed near the lower portion of the embedding metal fitting 13. The fixing method of the receiver 16 is as follows.
A screw portion (not shown) may be provided in advance on the embedded metal fitting 13 and fixed with a bolt or welded.

Further, the floor slab plate 10 is horizontally laid on the receiving member 16. The floor slab plate 10 is a half precast plate with an upper slab bar 11 disposed at the upper part, and is connected to a lower precast part by a truss bar 12. In the vicinity of the upper part of the upper slab streaks 11, a stud insertion bar 15 having a predetermined length is fixed to the embedding fitting 13 in parallel with the upper slab streaks 11,
Concrete is cast on the floor slab plate 10 to a position above the stud bar 15 and the floor slab plate 10 and the wall 2
And are integrated with each other by pins.

Therefore, the floor slab plate 10 and the wall 2 can be surely and strongly integrated with each other through the embedding fitting 13.

The floor slab plate 10 is installed by a crane (not shown). As shown in FIG. When the floor slab 10 having a full width is used, the installation from the upper side hinders the jump-form devices 5 and 5 and the installation from the lateral direction becomes considerably difficult. Therefore, the floor slab plate 10 has a length divided near the center between the walls 2 and 2 to facilitate installation. In this case, a stand-type support base 17 is erected from the floor slab 4 on the lower floor near the center between the walls 2 and 2, and the floor slab plate is placed between the support 16 and a recess 25 described later. The floor slab 4 is formed by erection of a plurality of 10s.

Next, another embodiment will be described with reference to FIGS. FIG. 6 is a side sectional view of a side surface of the mold 6 provided in the jump form device 5, in which a mold 18 for forming a concave portion is attached to the wall 2 of the mold 6. The recess forming mold 18 is for forming a recess 25 for installing the floor slab plate 10 in the wall 2 as shown in FIG. 7, and the floor slabs on both sides of the wall 2 are previously formed. The plate 10 is set and placed at the planned position. The lower part of the recess forming form 18 is formed horizontally with respect to the wall 2 in order to make the installation of the floor slab board 10 horizontal, and the upper part is formed of the floor slab board 10.
The wall 2 is inclined toward the inside to facilitate the connection with the wall 2.

The width and depth of the recess forming mold 18 in the wall 2 are determined by the supporting load of the floor slab plate 10, and the like.
And the height is determined by the thickness of the floor slab plate 10 and the like,
The whole shape is formed by a plate having an inner periphery formed in an inner space, and its material is formed of steel, wood, plastic or the like. Further, a bolt 19 is inserted from the mold frame 6 into the mold frame 6 near the lower portion of the recess-forming mold frame 18, and a screw portion 20 provided on the inner space side of the recess-forming mold frame 18 is inserted. The concave portion forming mold 18 is fixed to the mold 6 by screwing.

On the upper part of the wall 2, as shown in FIG. 7, a reinforcing bar anchor 2 for attaching a reinforcing bar 26 arranged in parallel with the floor slab plate 10 in the vicinity of the lower portion of the upper slab bar 11 is provided.
2 is disposed in contact with the outside of the plate inside the concave forming mold 18. The streak anchor 22 is formed in a cylindrical shape, and a screw portion 24 for screwing the streak 26 is provided at the center. At the time of installation of the recess forming mold 18, a bolt 23 is screwed into the screw portion 24 so that the recess forming mold 1
8 and the streak anchor 22 are fixedly placed. Thereafter, when the wall 2 is constructed by casting concrete, and the mold 18 for forming the concave portion is removed from the mold, first, the bolt 19 is removed, and further, the upper portion of the mold 18 for forming the concave portion is removed. This is performed by removing the bolt 23 from the opening 21 provided on the mold frame 6 side.

As shown in FIG. 7, a recess 25 is formed in the wall 2 from which the recess forming mold 18 has been removed, and the difference anchor 22 is embedded at a predetermined position. Thereafter, as shown in FIG. 7, the floor slab plate 10 made of the half precast plate is horizontally installed in the concave portion 25. After screwing the reinforcing bar 26 to the reinforcing bar anchor 22, concrete C is poured onto the floor slab plate 10 above the reinforcing bar 26 and the upper slab bar 11, and the floor slab plate 10 and the Wall 2
And are rigidly connected to be integrated.

Accordingly, the floor slab plate 10 and the wall 2 can be surely and strongly integrated with each other through the reinforcing bars 26. In addition, 27 in a figure shows a beam reinforcement and 28 shows a wall reinforcement.

Next, a method of installing the floor slab plate 10 will be described with reference to FIG. Although the above-described installation method splits the floor slab board 10 to facilitate installation, the floor slab board 1
By subdividing 0, the number of construction steps increases, and the construction period is extended. Therefore, the large-sized floor slab board 10
8A, the hook 3 around which the wire 32 of the crane (not shown) is stretched as shown in FIG.
A hanging jig 29 is attached to one of the slinging wires 30 for suspending the floor slab board 10 horizontally. The hanging jig 2
Reference numeral 9 denotes an electric chain block that can be remotely controlled by radio, and has a structure including a chain block main body, a driver with a receiver, and a controller with a transmitter.

As shown in FIG. 8 (b), when suspending the floor slab plate 10 between the jump form devices 5, 5, one of the slinging wires 30 is wound up by operating the suspending jig 29. The floor slab board 10 is inclined,
As the hook 31 is lowered, one of the slinging wires 30 is extended by operating the suspending jig 29 so as to gradually become horizontal. Thereafter, one end of the floor slab plate 10 is inserted into the recess 25 constructed in advance, and the posture of the floor slab plate 10 is controlled while the posture of the floor slab plate 10 is controlled while adjusting the suspending jig 29. And installed horizontally between the walls 2,2. As described above, the recesses 25 and 2 constructed in advance are used.
The floor slab plate 10 can be easily and reliably installed between the walls 2 and 2 by operating the hanging jig 29 and the hanging jig 29, so that the construction period is further reduced.

The joining of the wall 2 and the floor slab plate 10 is performed by directly driving the reinforcing bar 26 into the reinforcing bar anchor 33 provided on the wall 2 as shown in FIG.
Further, the end of the floor slab plate 10 is
5 to build a floor slab. This method requires that the concrete of the floor slab on the lower floor where the support member 34 is installed has sufficient strength, so that the method is somewhat inferior in shortening the construction period as compared with the above method.

Next, the cycle steps in the construction of an apartment house using the present invention will be described. Now, in the plan view of the apartment house shown in FIG. 1, the width between the walls 2 and 6 is 6 m, the width between the upper pillar 1 and the lower pillar 1 is 10 m, and the left and right walls 2 and 2 are partitioned. Consider the case where the number of houses is set to six, and furthermore, balconies and corridors of a predetermined width are provided outside the pillars 1, 1,..., Respectively.

First, the construction time of one partitioned unit (per unit) will be examined. Firstly, in constructing the vertical portions of the columns 1, 1 ... and the wall 2, it is necessary to prepare for the ascent of the jump form device and to ascend for 1 hour, and to assemble the column reinforcements (units) 30 hours.
Minutes, 2 hours for wall reinforcement, 2 hours for formwork construction, 2 hours for concrete placement, if work starts at 8:00 in the morning, until wall reinforcement in the morning, formwork and concrete in the afternoon. Casting can be performed and the work can be completed at 17:00.

Next, the construction time per unit of horizontal beams and floor slabs to be constructed two floors later than the construction of columns and walls is the precast beam in the horizontal direction in FIG. 1 (two).
1 hour for set, 2 hours for beam joint, joint arrangement and formwork set, 1 hour for set of half precast boards (four pieces), 1 hour for set of precast boards on balconies and corridors, floor slab streaks If it takes 4 hours for reinforcement and 2 hours for concrete placement and starts work at 8 am, finish the work related to beams in the morning, and from the afternoon to the morning of the next day from the set of half precast plates Work up to concrete placement can be completed.

In this way, it takes about five days at the latest to complete the work for one floor, but it can be completed in three to four days at the earliest. In the usual conventional construction method, even if the precast construction method which takes 11 to 14 days is used, the construction becomes an extremely short construction period compared to the cycle process of 6 to 7 days.

It should be noted that the present invention uses a jump-form device for building columns and walls, but the jump-form device itself is expensive.

However, the jump-form device can use leased products and can be diverted a great number of times, so that the factor of cost increase is small. Therefore, the man-hour is reduced by using the jump form device, and
Since the required number of man-hours is reduced, the cost can be significantly reduced.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0036]

As described above, according to the first aspect of the present invention, after a column or a wall formed of a form having the same plane cross section is constructed in advance by a jump form method, the form is jumped up. After that, since a horizontal portion such as a floor slab is constructed, a cycle process is shortened, and an ultra-short construction period can be performed. In addition, the vertical part of the pillar or wall is constructed at a stretch by the jump form method, and then the horizontal part such as the floor slab is constructed. It does not cause concrete quality defects such as joints and junkers.

According to the second aspect of the present invention, when the pillar or the wall is constructed by the jump form method, the embedding metal fitting for the construction of the floor slab and the receiving tool are fixed to the embedding metal fitting in advance. The floor slab can be easily and reliably installed, and the construction period can be shortened. Further, the column or wall and the floor slab plate can be reliably and strongly integrated through the embedding metal fitting by concrete casting.

According to the third aspect of the present invention, when the pillar or the wall is constructed by the jump form method, the concave portion is formed in advance at the position where the floor slab is to be installed relative to the column or the wall by using the concave portion forming form. At the same time as the execution of the jump form method, the support portion of the floor slab plate can be easily formed. In addition, since the floor slab is erected in the recess, the installation can be performed easily and reliably, and the construction period can be shortened. Further, the column or wall and the floor slab plate can be strongly integrated by rigid connection.

According to a fourth aspect of the present invention, in addition to the effects of the second or third aspect of the present invention, since a floor slab having a divided length is used, a jump form installed above a pillar or a wall is used. The floor slab can be smoothly installed between the pillars or walls without disturbing the apparatus.

According to a fifth aspect of the present invention, in addition to the effect of the second or third aspect of the present invention, when installing a floor slab,
Since the hanging jig is attached to one of the sling wires, the floor jig can be easily hung between the pillars or the walls by tilting the floor slab plate by winding up the sling wire by operating the hanging jig, and extending it. By doing so, it can be installed horizontally.

In this way, after the columns or walls are constructed by using the jump form method, the horizontal parts such as floor slabs are constructed, so that the construction period is shortened and the construction cost can be greatly reduced. It is an invention which has various significant effects.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a plan view of an apartment house.

FIG. 2 is a plan view of a jump form device for constructing columns and walls.

FIG. 3A is a side sectional view of a jump form device. (B) Side sectional drawing which shows the state which the jump form apparatus jumped up.

FIG. 4 is a side sectional view showing a state where an embedded metal fitting is installed in a wall.

FIG. 5 is a side view of an apartment house showing a state where divided floor slabs are installed.

FIG. 6 is a side cross-sectional view showing another embodiment, in which a concave forming mold is attached to a mold of a jump foam device.

FIG. 7 is a side sectional view of a wall, in which an upper part shows an installed state of a recess forming mold and a lower part shows a joint state with a floor slab plate.

FIG. 8A is a side view showing a suspended state of a floor slab plate. (B) The side view of the apartment house which shows the state which installs a floor slab board between walls.

FIG. 9 is a side cross-sectional view showing a still further embodiment and showing a joint state between a wall and a floor slab plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 pillar 2 wall (door boundary wall) 4 floor slab 6 formwork 10 floor slab board 13 embedding metal fittings 16 receiving device 17 support base 18 concave form forming form 25 concave section 29 hanging jig 30 slinging wire C concrete

Claims (5)

[Claims] 1. A method of constructing a building in which pillars or walls are vertically erected at predetermined intervals and floor slabs or the like are horizontally arranged between the pillars or walls. A method for constructing a building, comprising: constructing a pillar or wall to be formed in advance by a jump form method, jumping up the formwork, and then constructing a horizontal portion such as the floor slab. 2. A method for constructing a building in which pillars or walls are erected vertically at predetermined intervals and a floor slab or the like is horizontally arranged between the pillars or walls. When constructing by the construction method, the embedding metal fittings are installed in advance at the installation positions of the floor slab with respect to the columns or walls in accordance with the outer surfaces of the columns or walls, and concrete is cast to construct the columns or walls. A method for constructing a building, comprising: fixing a support for supporting a floor slab plate serving as the floor slab in the vicinity of a lower portion of the embedding metal fitting; and laying the floor slab plate between the mounts. 3. A method of constructing a building in which pillars or walls are vertically erected at predetermined intervals and a floor slab or the like is horizontally arranged between the pillars or walls. When constructing by the construction method, a recess forming mold is installed in advance at the installation position of the floor slab with respect to the pillar or wall, and concrete is cast to construct the pillar or wall, and then the recess forming mold is formed. Removing the slab, forming a recess in the pillar or wall, and laying a floor slab plate serving as the floor slab in the recess. 4. A support for installing the floor slab plate in the vicinity of the central portion of the receiving slab or the recessed portion using a floor slab plate having a length divided near the center between the columns or walls. The building construction method according to claim 2 or 3, wherein the floor slab is formed by erection between a plurality of stands. 5. When the floor slab plate is installed in the receiving member or the recess, a sling wire is wound around both ends of the floor slab plate, and a hanging jig is attached to one of the sling wires. At the time of hanging between the columns or walls, one of the sling wires is wound up by the hanging jig to incline the floor slab plate. The building construction method according to claim 2 or 3, wherein the floor slab is leveled while extending.