JPH11166323A - Construction method for rc molded frame installed in building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the remarkable shortening of the whole term of works including a building by contriving the construction of a large-sized frame so as to be advanced in parallel to the construction of the building when the large- sized frame is constructed within the building. SOLUTION: This method is constituted of a frame arrangement of bar process building a frame arrangement of bar 14 in parallel to the arrangement of bar of a building batholith 12 and a batholith concrete placing process placing concrete 16 of the batholith 12 in parallel to the frame arrangement of bar 14. The method is provided with a building framework construction process constructing a framework 18 of a building on the batholith 12 after the completion of the frame arrangement of bar 14 and a frame concrete placing process constructing a turbine frame 10 by placing concrete 22 on the frame arrangement of bar 14.

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 large RC (reinforced concrete) frame to be housed in a building.

[0002]

2. Description of the Related Art In a power generation facility such as a thermal power plant, a large turbine is installed in a state of being housed in a building, and a large gantry having high strength is provided for installing the turbine. This large gantry is constructed of RC and is integrally constructed from the bottom of the building so that a heavy turbine can be reliably supported. For this reason, the rebar arrangement structure of the turbine mount is remarkably large, and in order to form the rebar arrangement, it is necessary to provide a framework such as a column or a lateral member and a support for supporting the lateral member.

[0003]

However, such a conventional RC turbine frame is large in size, so that the construction period for constructing the frame is significantly prolonged.
It is desirable to build a gantry in parallel with the construction of the building.However, in this large gantry construction, concrete casting is cast in place, and the plane block split and lift split are different from the building body, and Since the erection of the weight support is required, it is extremely difficult to match the construction of the gantry with the construction speed of the building frame work. Therefore, it is inevitable that such a large turbine mount will be installed after the construction of the building frame is completed, and the mount work will be performed inside the building.
The existing part of the building is an obstacle to the progress of construction.

[0004] Under these conditions, as a measure to shorten the construction period of the turbine mount, an unsupported construction method using a driving truss by abolishing the weight support of the horizontal member has been attempted, as described above. Since the construction was started after the completion of the building frame, there was a problem that it was not possible to significantly reduce the construction period.

In view of the above-mentioned problems, the present invention includes a building by constructing a large gantry in a building so that the construction of the large gantry can proceed in parallel with the construction of the building. An object of the present invention is to provide a method of constructing an RC gantry that is installed in a building that can significantly shorten the entire construction period.

[0006]

According to a first aspect of the present invention, there is provided a method of constructing an RC gantry to be installed in a building. In a method of constructing an RC gantry installed in a building, which is provided on a floor of the building, a gantry reinforcing step of laying the gantry reinforcement in parallel with the reinforcement of the building bottom, A bottom concrete placing step of placing the concrete of the bottom base, and a building framing step of building a building framework on the bottom floor after the completion of the placement of the base; and And a concrete placing step for constructing an RC gantry by placing concrete on the base.

According to a second aspect of the present invention, there is provided a method for constructing an RC gantry installed in a building, wherein a large RC gantry accommodated in the building is provided on a bottom of the building. In the construction method of RC gantry to be installed indoors, the gantry arrangement is made into parts and unitized in advance and the whole is divided into multiple parts and assembled, and the reinforcement arrangement and concrete placement are completed. On the above-mentioned bottom plate, a truss bar arranging step of laying the block arranging bars arranged in parallel with the construction of the building frame, and placing concrete in the arranging bars in parallel with the building. And a gantry concrete casting step of constructing an RC gantry.

The R installed in the building of the present invention described above
The operation of the method of constructing the C-shaped gantry will be described below. According to claim 1, in the gantry arrangement step, the reinforcement of the building bottom is arranged in parallel with the arrangement of the gantry, and By laying the concrete of the bottom in the concrete laying step, the arbor arrangement can be completed almost at the same time as the completion of the construction of the bottom, or at least before the framework of the building is constructed. At this time, the arbor reinforcement is an outdoor construction before the building is constructed, so the arranging work of the RC gantry is performed without any obstacles,
The work efficiency is greatly improved, and the arranging of the gantry is completed within a short period of time. Then, after the arranging of the gantry is completed, a framing process of the building is performed, whereby a framing of the building is constructed on the bottom, and a concrete placing process of the gantry is performed in parallel with the construction of the building. In this gantry concrete placing step, concrete is laid on the arranging bars and the RC gantry is constructed. Thus, in parallel with the construction of the building, the above R
Since the C gantry can be constructed, the RC gantry can be completed when the construction of the building is completed, and the overall construction period of the building including the RC gantry can be significantly reduced. Can be.

According to the second aspect of the present invention, in the gantry arrangement block forming step, the gantry arrangement is previously divided into a plurality of parts by dividing the arrestor arrangement into parts and units. It is built on the floor of the building in parallel with the construction of the building frame by the building process. Then, after completion of the arranging of the gantry, a gantry concrete laying step is performed in parallel with the construction of the building, and concrete is laid on the arranging of the gantry to construct the RC gantry. In this way, the RC gantry is constructed in parallel with the construction of the building. At this time, the arranging of the gantry is divided in advance and pre-assembled ones are divided into blocks. It can be assembled easily and in a short period of time simply by loading and connecting the reinforced bar arrangement to the site. Therefore, the construction of the RC frame can be completed at the time of completion of the construction of the building.
The overall construction period of the building, including the gantry, can be significantly reduced.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 12 show a first embodiment of a method for constructing an RC gantry to be installed in a building according to the present invention, and FIG. 1 shows an outline of a procedure for constructing an RC gantry (a).
To (c), FIG. 2 is an overall perspective view of the RC gantry to be constructed in this embodiment, and FIG.
FIG. 4 is a front view showing an initial stage of the work of arranging reinforcing bars of the C gantry and the assembling work of the gantry, FIG. 4 is a front view showing an intermediate stage of the work floor assembling work of the RC gantry, and FIG. 5 is a perspective view showing a partial configuration of the work floor. Fig. 6 and Fig. 6 are front views showing the assembly of the main reinforcement at the lower end of the beam of the RC frame, Fig. 7 is an exploded perspective view of the main bar at the lower end of the beam, the beam bottom formwork and the beam bottom support, and Fig. 8 is the beam of the RC frame. 9 is an exploded perspective view of the upper reinforcing bar of the beam, FIG. 10 is a front view showing a completed state of reinforcing bars of the RC gantry, and FIG. 11 is a front view showing a mounting state of the vertical member. It is.

The method of constructing the RC gantry according to the present embodiment will be described with reference to an example of a method of constructing a turbine gantry of a power plant. The turbine gantry is constructed in a state housed in a building of the power plant. That is, as shown in FIG. 1, the construction method of the turbine gantry 10 of this embodiment includes a gantry arrangement step (a) for arranging the gantry arrangement 14 in parallel with the reinforcement arrangement of the building bottom 12, and a gantry arrangement 1
A bottom concrete placing step (b) for placing concrete 16 of the bottom 12 in parallel with 4; and a building framework step (b) of constructing a building framework 18 on the bottom 12 after the completion of the arranging of the gantry 14. , Slab 2 on each floor of building frame 18
In parallel with the construction, concrete 2
2 and a gantry concrete casting step (c) for constructing the turbine gantry 10.

As shown in FIG. 2, the turbine mount 10 has a plurality of pillars 24 arranged in two rows,
And a beam 26 connecting the upper ends in the column direction, and the opposing beams 26 are appropriately connected by a connecting beam 28, and an intermediate beam 30 is provided on some of the pillars 24.

In the arranging step of the gantry shown in FIG. 1A, first, as shown in FIG. 3, a scaffold 32 is temporarily provided around the outer periphery of the turbine gantry 10 to be constructed on both sides. While the steel columns 34 are temporarily provided, the leg reinforcing bars 36 are constructed at locations corresponding to the pillars 24. Also, as shown in FIG. 4, a steel frame connecting member 38 is laid across the temporary steel column 34 as shown in FIG. 5, and a joist steel pipe 40 is inserted between these steel frame connecting members 38 to attach a scaffold plate 42 thereto. It has become. The temporary steel columns 34 are arranged at an interval of about 2 m in consideration of the cross-sectional dimension of the horizontal member constituting the suspension support of the bottom formwork and the interval between the sites for the work scaffolds.

By the way, after the leg reinforcement 36 is completed, a beam lower main reinforcement 44 of the beam 26 is disposed at the upper end of the leg reinforcement 36 as shown in FIG. In arranging the main beams 44 at the lower end of the beam, as shown in FIG. 7, a bottom form temporary receiving stage 46 is attached, and a temporary large drawing material 48 and a joist material 50 are passed over the stage 46, and a beam bottom deck plate 52 is laid. The beam lower main bar 44 and the beam lower stirrup bar 54 are constructed thereon.

Next, after the above-mentioned beam lower main bar 44 is constructed, a beam upper main bar 56 is arranged as shown in FIG. In arranging the beam upper main bars 56, as shown in FIG. 9, a beam reinforcing frame 60 is attached above a beam bottom form support beam 58 bolted to the beam bottom deck plate 52,
The beam upper main bar 56 and the beam upper stirrup bar 62 are constructed thereon, and the turbine mount 10 as shown in FIG.
Is completed. Reinforcement (not shown) corresponding to the connecting beam 28 and the intermediate beam 30 is provided between the leg reinforcing bars 36 and between the beam lower main bars 44 and the beam upper main bars 56.

The reinforcing bar arrangement 14 is a temporary steel frame comprising a weight support, a suspension support for a bottom form of a horizontal member, a reinforcing bar assembling base, and a work scaffolding building for driving a concrete frame. Used. Further, as shown in FIG. 11, the temporary steel column 34 serving as a vertical member is provided with a joint 64 in advance on the concrete surface of the horizontal member of the turbine mount 10, and a hydraulic jack 66 is provided in one joint 64. ,
It is desirable to reduce labor in dismantling work after the concrete strength of the beams 26 and the intermediate beams 30 serving as the horizontal members (gas fusing and repair work associated therewith). Still further, the vertical members are arranged at predetermined intervals in consideration of the cross-sectional dimensions of the horizontal members constituting the suspension support of the bottom formwork and the intervals between the building sites for the work platforms.

Therefore, in the method of constructing the turbine gantry 10 according to the present embodiment, the building bottom 12
And the base reinforcements 14 are arranged in parallel with each other, and the concrete 16 of the bottom base 12 is driven in parallel with the base reinforcements 14 by a bottom concrete placement step. The gantry arrangement 14 can be completed at about the same time as completion, or at least before the building framework 18.

As described above, in the present embodiment, since the assembling work of the gantry reinforcing bar 14 can be performed before the frame 18 of the building, the arranging bar reinforcing bar 14 must be worked as an outdoor construction before the building is constructed. Accordingly, the work is performed without any obstacles, and the work efficiency is greatly improved, so that the assembling work of the gantry arrangement 14 can be completed in a short period of time. Then, after the completion of the arranging of the gantry 14, a framing process of the building is carried out, whereby a framing 18 of the building is constructed on the base 12 and a concrete placing process of the gantry is carried out in parallel with the construction of the slabs 20 on each floor of the framing 18. By doing so, concrete 2
2, the turbine mount 10 can be constructed.

As described above, in this embodiment, since the turbine mount 10 can be constructed in parallel with the construction of the power plant building, the construction of the turbine mount 10 can be completed when the construction of the building is completed. . Therefore, the overall construction period of the building including the turbine mount 10 can be significantly reduced.

FIG. 12 to FIG. 17 show a second embodiment of the method of constructing an RC gantry to be installed in a building according to the present invention.
2 is a process diagram showing the outline of the construction procedure of the RC gantry in order from (a) to (c), FIG. 13 is an overall perspective view of the RC gantry to be constructed in this embodiment, and FIG. FIG. 15A is a front view showing a frame of a gantry frame, FIG. 15B is a side view of the gantry frame, and FIG. 15 is a partially detailed view of a frame of a gantry frame, a reinforcement, a beam bottom formwork and a work floor of an RC gantry. FIG. 16 is a view showing the state of the pre-assembled blocks of the RC gantry, and FIG. 17 is an explanatory view showing the connection portions of the reinforcing bars of the RC gantry that has been made into a block. The description will not be repeated.

In this embodiment, as in the first embodiment, the method of constructing the RC gantry will be described with reference to the method of constructing the turbine gantry of the power plant. That is, in the method of constructing the turbine mount 10 of this embodiment, as shown by the dashed line in FIGS. As shown in FIG. 12 (b), a frame 18 of the building is constructed on the bottom 12 of the building where the reinforcement and the concrete placement are completed as shown in FIG. 12 (a). A arbor arrangement step of arranging the arrestor arrangement 14 blocked in parallel with the above, and a building frame 18 as shown in FIG.
In parallel with the construction of the slab 20 on each floor,
4 is a concrete mounting step of casting the concrete 22 into the turbine mount 10.

As shown in FIG. 13, the turbine mount 10 connects a plurality of pillars 24 arranged in two rows and the upper ends of these pillars 24 in the row direction as in the first embodiment. The beam 26 is roughly configured, and the opposing beams 26 are appropriately connected by a connecting beam 28, and an intermediate beam 30 is provided on some of the pillars 24. Then, the dividing position of the gantry reinforcing bar 14 to be blocked in the gantry reinforcing bar blocking step is the one-dot chain line position in FIG. 14, which is one point in the same figure of the turbine gantry 10 shown in FIG. The position corresponds to the chain line.

That is, the block is divided into left and right parts from the center in plan view, and divided into five parts in the length direction corresponding to each pillar 24, for a total of ten divisions (SA, SB, SC...).
.. SI, SJ) and further divided into 10 parts in a plan view, each divided into two parts in an up-down direction (SA-
1, SB-2, SB-1, SB-2, SC-1, SC-
2 ...) and the whole is divided into 20. Of course, it is needless to say that the number of divisions can be arbitrarily set in consideration of work procedures, workability, and the like.

As shown in FIG.
Temporary columns 34 that also serve as supports, and each temporary column 3
The frame is formed by the connecting member 38 to be inserted into the steel frame 4 and the driven steel beam 70 for the suspension form, and as shown in FIG.
Five leg reinforcements 36 are provided. Then, as shown in the figure, a scaffold plate 42 is attached to the connecting member 38, and the temporary support 34 and the connecting member 38
Reinforced with. In addition, the driving steel beam 70 for the suspension form
Are the joist 50 and the deck plate 5 as shown in FIG.
2. Beam bottom formwork supporting beam 58, beam reinforcing frame 60, beam steel frame 74
And the main beam 56 at the upper end of the beam, stirrups 54 and 62, and the like.

In the gantry arrangement step, the gantry arrangements 14 divided and blocked are lifted as shown in FIG. 16 and sequentially carried to the site, and then the gantry arrangements are blocked. The streaks 14 are sequentially assembled at the construction site of the turbine mount 10. At this time, the reinforcing bars of each block constituting the gantry reinforcing member 14 are connected to each other.
As shown in (a) and (b) of FIG.
The nut 76 can be connected using a screw rebar.
In this connection structure, as shown in FIG.
It is desirable that the grout agent can be finely adjusted at 8 and that the grouting agent be injected into the nut 76 with both the connecting members 38 connected as shown in FIG.

Therefore, the turbine mount 10 of this embodiment is
In the construction method of the above, the arrestor arrangement 14 is previously divided into a plurality of parts by unitizing and arranging the arrestor arrangement 14 in a arrestor arrangement block forming step.
In the frame, a block formed in the frame 18 is sequentially suspended in the frame 18 in parallel with the frame 18 of the building by the step of arranging reinforcing bars, and is built into the floor 12 of the building. Then, after completion of the arranging bars 14, a gantry concrete placing process is performed in parallel with the construction of the slabs 20 on each floor of the building frame 18, whereby the arranging bars 14 are provided.
Concrete 22 is poured into the turbine mount 10
Is constructed. When the gantry arrangement 14 is erected, it is necessary to protrude a reinforcing bar for a joint from the building bottom 12, or a lower stage (SA-1, SB-1, SC-1...) Are buried in the concrete 16 of the building bottom 12 in advance.

As described above, the turbine frame 10 is constructed in parallel with the construction of the building. At this time, the frame arrangement 14 is divided in advance and the preassembled one is blocked. Therefore, it is possible to easily and quickly assemble the pedestal reinforcing bars 14 which are respectively blocked, only by carrying them into the site and connecting them. Therefore, at the time of completion of the construction of the building, the construction of the turbine mount 10 can be completed, and the overall construction period of the power plant building including the turbine mount 10 can be significantly reduced as in the first embodiment. Can be.

In this embodiment, the RC gantry is described by taking the turbine gantry 10 of the power plant as an example. However, it goes without saying that the present invention can be applied to a gantry of a large machine having another gantry weight. Nor.

[0029]

As described above, the effects of the method for constructing an RC gantry installed in a building according to the present invention will be described below for each claim.

(1) According to the construction method of claim 1, in the arranging step of the gantry, the arranging of the floor of the building and the arranging of the gantry are performed in parallel, and the concrete laying step of the bottom is performed in parallel with the arranging of the gantry. As a result, the concrete for the bottom is cast, so that the reinforcing bars can be arranged almost at the same time as the completion of the construction of the bottom, or at least before the framework of the building. Therefore, since the installation of the arbor arrangement at this time can be an outdoor construction without obstacles, the work efficiency is greatly improved, and the arrest arrangement can be completed in a short period of time. Then, after the completion of the arranging of the gantry, a framing process of the building is carried out, whereby a framing of the building is constructed on the bottom, and a concrete laying process of the gantry is performed in parallel with the construction of the building. Can be built. As described above, the RC gantry can be constructed in parallel with the construction of the building, and the construction of the RC gantry can be completed when the construction of the building is completed. It is possible to greatly reduce the required construction period.

According to the second aspect of the present invention, the gantry arrangement is divided into a plurality of parts by dividing the arrestor arrangement into parts and units in advance in the gantry arrangement block forming step. In the building process, it is built on the floor of the building in parallel with the construction of the frame of the building, and after completion of the reinforcement arrangement, the concrete mounting process of the gantry is performed in parallel with the construction of the building to build the RC frame. Therefore, the RC gantry can be constructed in parallel with the construction of the building. Further, since the gantry arrangement is preliminarily divided and pre-assembled by blocking, the gantry arrangement can be easily assembled in a short time only by carrying in and connecting the blocked arrest arrangement to the site. Therefore, the construction of the RC frame can be completed at the time of the completion of the construction of the building, and the entire construction period of the building including the RC frame can be significantly reduced as in the above-described claim 1. It has various excellent effects.

[Brief description of the drawings]

FIG. 1 is a process diagram showing an outline of a construction procedure of an RC gantry according to a first embodiment of the present invention in order from (a) to (c).

FIG. 2 shows an RC to be constructed in the first embodiment of the present invention;
It is a whole perspective view of a construction stand.

FIG. 3 is a front view showing an initial stage of an RC arranging work and a gantry steel frame assembling work in the first embodiment of the present invention.

FIG. 4 is a front view showing an intermediate stage of a work floor assembling operation of the RC gantry according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing a partial configuration of a work floor according to the first embodiment of the present invention.

FIG. 6 is a front view of a main bar at the lower end of the beam of the RC gantry according to the first embodiment of the present invention.

FIG. 7 is an exploded perspective view of a beam bottom main reinforcement, a beam bottom formwork, and a beam bottom support portion in the first embodiment of the present invention.

FIG. 8 is a front view of a reinforcing bar at the upper end of the beam of the RC gantry according to the first embodiment of the present invention.

FIG. 9 is an exploded perspective view of a reinforcing bar at the upper end of the beam in the first embodiment of the present invention.

FIG. 10 is a front view of the RC gantry according to the first embodiment of the present invention in a state in which reinforcing bars are completed.

FIG. 11 is a front view showing an attached state of a vertical member according to the first embodiment of the present invention.

FIG. 12 is a process chart showing the outline of the construction procedure of the RC gantry in the second embodiment of the present invention in order from (a) to (c).

FIG. 13 illustrates an R to be constructed in the second embodiment of the present invention.
It is the whole perspective view of a C frame.

FIGS. 14A and 14B are a front view and a side view, respectively, showing a frame of a gantry steel frame of an RC gantry according to a second embodiment of the present invention.

FIG. 15 is a partial detailed view of a frame of a gantry of a RC gantry, reinforcing bars, a beam bottom formwork, and a work floor in a second embodiment of the present invention.

FIG. 16 is a view showing a erection state of a pre-assembled block of an RC gantry according to a second embodiment of the present invention.

FIG. 17 shows RC blocks according to the second embodiment of the present invention;
It is explanatory drawing which shows the connection part of the reinforcement arrangement of a gantry.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Turbine mount 12 Building bottom board 14 Base reinforcement 16 Concrete of bottom board 18 Building frame 20 Slab 22 Concrete of mount

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshifumi Yamaguchi 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka

Claims (2)

[Claims] 1. A method of constructing a RC gantry installed in a building, wherein a large RC gantry accommodated in the building is provided on the bottom of the building. A truss arrangement process for building gantry reinforcement, a bottom concrete placing process for placing the concrete of the bottom in parallel with the truss reinforcement, and constructing a building framework on the bottom after completion of the arrest arrangement A building framing process, and, in parallel with the construction of the building, a gantry concrete casting process of laying concrete on the arranging bars and constructing an RC frame. R
How to build a C-frame. 2. A method of constructing an RC frame to be installed in a building, wherein a large RC frame to be housed in the building is provided on the bottom of the building. And the whole is divided into multiple parts and assembled into a gantry rebar block-forming process.
A truss bar arranging process for laying the above-mentioned block arranging bars in parallel with the construction of the building frame, and, in parallel with the construction of the building, placing concrete in the arranging bars and constructing an RC frame. R installed in a building, comprising:
How to build a C-frame.