JPH0949264A - Constructing method for reinforced concrete framework and structure, and member therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently construct the framework of a reinforced concrete structure which is aseismic base-isolated structure, capable of combining a half precast floor slab and a prestressed concrete girder, and which has high reliability structurally in a short period of construction, without using scaffolds, temporary from supports, and temporary forms. SOLUTION: Half precast column members 18, hereafter half precast is referred to as HPC, and HPC girders 19 are produced in a factory or at a workplace. There are connected to each other at the joint parts of a HPC framework and are assembled into the HPC framework. On the other hand, main reinforcements for columns are extended to the central parts of the columns above and below, centering around the joint part and hoop reinforcements are fastened thereto, and main reinforcements for girders are extended to the intermediate parts of the girder members in front and rear, right and left directions, centering around the joint part and rib reinforcements are fastened thereto. On the ground, they are integrally pre-assembled into a reinforcing cage. This cage is placed in hollow parts 22 of the HPC column members 18 and in hollow parts 32 of the HPC girder members 19, and the cages neighboring to each other are connected with reinforcements, following which concrete is placed at the insides of hollow parts formed of HPC frameworks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a structure, such as a reinforced concrete frame, and a material necessary for implementing the method.

[0002]

2. Description of the Related Art Conventionally, a method of constructing a reinforced concrete frame is to hang a scaffold, build a temporary frame support, install a temporary frame on it, assemble a reinforcing bar inside the temporary frame, and place concrete. The method was to remove the temporary frame support work and the temporary frame after the concrete developed a predetermined strength. This construction method is complicated and requires a long construction period, and most of the work is on-site work at high places, and the work environment is poor compared to work at a factory or a work place on the ground, so safety and efficiency are improved. In terms of aspect, improvement was required. Since scaffolding, temporary frame support work, installation and removal of formwork, and rebar assembly inside the temporary frame are complicated and require a lot of labor and time, a method of reducing them has been proposed. For example, there is a method in which a hollow column member made of reinforced concrete produced in a factory is installed on the site, and a concrete is placed therein to form a part of the column (Japanese Patent Laid-Open No. 64-8064).
No. 9). This method eliminates the need for temporary frame support work and the installation and removal of temporary frames for columns, but it is still insufficient from the viewpoints of simplification of work on the entire reinforced concrete framework, labor saving, and shortening of the construction period. It was

[0003]

DISCLOSURE OF THE INVENTION The present invention has improved the method of constructing a reinforced concrete frame to eliminate the need for scaffolding, temporary frame support and temporary frame, and the conventional temporary frame that has been carried out at high places. Support work, temporary frame assembly work and rebar assembly work have been replaced with factory or field work site work, and the weight of both the factory production material unit and field work site assembly material unit has been leveled to enable efficient transportation of materials. It shortens the construction period, saves the construction cost, secures the safety of work, and at the same time, it is the conventional method of constructing a reinforced concrete structure. Providing a method of constructing a strong reinforced concrete construction frame, which has the advantage of producing an excellent structure with a high constant order, and then utilizing the fact that the construction method is a general method, How to reach the structure For a seismic isolation structure having a seismic isolation device, a frame structure including a PS concrete large beam required for relatively long beams, and a reinforced concrete structure including an HPC floor slab member as an example of a secondary member. The purpose of the present invention is to provide a construction method expanded up to and a member used therefor.

[0004]

[Means for Solving the Problems]

(Improvement of construction method) First, the construction method of the conventional reinforced concrete frame is the H
The construction method of assembling the PC pillar member and the HPC girder member into the HPC shaft frame structure, placing the assembled pre-assembled rebar cage and placing concrete in the factory or on-site workshop is improved. In this construction method, the concrete to be cast, the rebar cage, and the HPC member are considered as three elements for the frame, and each is divided as follows.

(Concrete placement category) Concrete is a continuous joint having a high static constant order by placing the floor surface as a jointing portion and placing the floor surface and the floor surface immediately above the floor integrally. The advantage of the conventional method of framing reinforced concrete structures is to make use of these structures.

(Splitting of HPC Framework) HPC framework is
Divide into units with nodes as connecting parts, and for columns, from the floor surface of each floor to the bottom of the girder as one member, and for girders, from the beam end to the beam end as one member for each span. .

(Division into rebar cages) Rebar cages have a central portion and an intermediate portion as connecting portions, a pillar is divided into a central portion, and a girder is divided into an intermediate portion,
Column reinforcements are from the upper part of the lower column to the lower part of the upper column, and the girder reinforcements are the reinforcements from the right part of the left beam to the left part of the right beam, the front part of the back beam to the back part of the front beam, for each node. Assemble into one rebar basket.

(Shape and Structure of HPC Column Member) Next, HPC
The shape and structure of the pillar member is such that the top and bottom are open and the inside is hollow, and the HPC pillar member main bar and the HPC pillar member band bar arranged inside the projected corner are tightly connected to each other to form an HPC pillar member. The covering part around the main bar and the outer covering part of the HPC pillar member stirrup are covered with concrete having a thickness greater than that specified by law, and built into the main body part. On the other hand, it is buried in concrete to such an extent that the strips are hidden. The main bar is continuous at both ends with the top protruding main bar and the bottom protruding main bar.

(Shape and Structure of HPC Girder Member) The shape and structure of the HPC girder member is a groove type as a whole with both ends and apex open, and inside the lower projected corner portion over the entire length of the beam. In addition, if the main reinforcement of the HPC girder member is pulled through and the bending moment due to long-term loading is required, the main reinforcement is additionally arranged below the middle part of the beam length, and the main reinforcement and the UPC girder of U-shape open upward. The member ribs are tightly bound, and the outer covering portion of the HPC girder member ribs and the covering portion around the HPC girder member main muscles are covered with concrete having a thickness not less than that stipulated by law, and embedded in the main body. The HPC girder member is buried in concrete from the ribs toward the inside so that the ribs are hidden.

(Structure of HPC Girder Member of PS) If necessary, for the main bar of the HPC girder member, a PC steel wire or a PC steel bar is used instead of the reinforced concrete steel bar.
The HPC girder member can be used.

(Structure of framing joint) The shape and structure of the framing joint, which is the intersection of the pillar and the girder, has a sleeve joint for joining the bottom protruding main bar and the top protruding main bar of the upper and lower HPC pillar members. Then, after inserting the rebar cage, arranging the band joints around the sleeve joints, binding them together, and performing the necessary reinforcement bar arrangements around the sleeve joints. Pour the concrete so that it has a cover. Since the HPC column girder members are not enclosed between adjacent girders centering around the column, a separate temporary frame is required for this part. Use a material that functions as a part of the cover and does not need to be removed, and make a temporary frame for driving.

(Seismic isolation foundation) A seismic isolation foundation and an underground girder having seismic isolation elements are constructed in a prescribed structure at a prescribed position, and the above-mentioned reinforced concrete frame is constructed on the seismic isolation foundation. Construct a reinforced concrete structure with seismic performance.

(HPC floor slab member) On the HPC girder member of the HPC shaft assembly assembled by connecting at the nodal points of the shaft assembly, HP
After the C floor slab member or the existing floor slab member and the temporary frame for discarding are laid over and predetermined floor reinforcement is performed, a reinforced concrete structure is constructed.

[0014]

[Action]

(Division and Assembly) In the construction method according to the present invention, the concrete to be cast, the pre-assembled rebar cage, and the HPC member are considered to be the three elements for the frame, and the HPC member is divided as described above. The joints are provided at the nodes, and the joints of the pre-assembled rebar cages are provided at the central portion and the intermediate portion of the member, and the two are separated from each other, so that the material for assembling and the work congestion can be avoided.

(Reinforcing bar joint) From the viewpoint of structural strength, the bending moment when horizontally loaded is generally large at the nodal points and small at the intermediate and central portions of the member, but the reinforcing bar of the pre-assembled rebar cage according to the present invention is The joints of the main bars of the rebar cage are provided at the central portion and the intermediate portion of the member having the small stress, which is very advantageous in terms of the structure.

(Leveling Unit Weight) As a result of the above-mentioned division, the size of each unit of the HPC column member, HPC girder member, and rebar cage is limited, and the weight is reduced. Within the lifting capacity of, and the weight is leveled.

(Construction of seismic isolation foundation) A seismic isolation foundation and an underground beam having seismic isolation elements are constructed, and the above-mentioned reinforced concrete frame structure is constructed on the seismic isolation structure to make it easy to construct a seismic isolation structure. Build a structure.

(Standing up of HPC pillar member) In the concrete process, first, the HPC pillar member is built using a hoist,
From the nodal position of the floor concrete on the construction floor, lower the lower part of the upper pillar of the reinforcing bar cage protruding upward so as to be inserted into the hollow part of the HPC pillar member, and further construct the bottom protruding main bar of the HPC pillar member. Insert it into the sleeve joint embedded in the node position of the floor concrete on the first floor, and
The top protruding main bar of the C pillar member is joined.

(HPC Column Member as Hypothesis Supporting Column) The HPC column member thus constructed is used as a temporary frame by inserting a reinforcing bar into the hollow portion and placing concrete,
Combine with the HPC part to make a reinforced concrete pillar material. Furthermore, the HPC pillar member main reinforcement is arranged on the inside of the projected corner on itself, and it is tightly connected to the HPC pillar member reinforcement, and the periphery of the main reinforcement and the outer surface of the reinforcement are covered with concrete of a thickness greater than that required by law. Although it is incomplete, it is a reinforced concrete pillar,
It has the structural strength to withstand the vertical load, and since the column base is fixed to the lower floor by the bottom protruding main bar, it can handle the construction load such as large beams, floor slabs and concrete.

(HPC large beam member as a temporary support beam) H
Using a hoist, hang the PC girder member over the HPC pillar member. The HPC girder member thus bridged is used as a temporary frame to insert a reinforcing bar into the hollow part, cast concrete, and combine with the HPC part to make a reinforced concrete structure girder material. H in itself
The main beam of PC girder member and the rib of HPC girder member are tightly bound, and the periphery of the main bar and the outer side of the rib are covered with concrete having a thickness greater than that specified by law. Since it has a structural strength as a simple beam that can withstand the vertical load, the work load of floor slab, concrete, etc. can be handled on it.

(Replacement with PS material) The main bar of the HPC girder member is replaced with a reinforced concrete steel rod, and a PC steel wire or P steel wire is used.
An HPC girder member of PS can be used as the C steel rod.
The HPC beam and floor slab are installed on the PS HPC beam member.

(Placement of floor material) Scaffolding temporary frame In order to solve the problem of not using a temporary supporting frame, H is placed on the above-mentioned HPC girder member.
Place the PC floor slab member. Instead of the HPC floor slab member, a full PC floor slab or a driven deck plate can also be used.

(Structure of Reinforcing Bar Basket) Reinforcing bars are divided into reinforcing bars gathering at one node, and the reinforcing bars are connected to the upper half of the lower pillar to the lower half of the upper pillar with the cords. In the joint portion of the column girder, a sleeve joint that connects the bottom projecting main bar and the top projecting main bar of the HPC column member to each other is incorporated into the joint part. The main girders are the right half of the left girder to the left half of the right girder, and the main bars of the front half of the back girder to the back half of the front girder are tied together with ribs, and one unit is put together for each rebar gathering at one node, Assemble as a pre-assembled rebar cage at the factory and workshop.

(Installation of rebar cage) This rebar cage is hung with a hoist and the rebar above the lower column is inserted into the hollow part of the HPC column member so that the right half of the left beam and the left half of the right beam are inserted. , Reinforcing bars of the front half of the back beam and the back half of the front beam are placed in the U-shaped groove of the left beam, right beam, back beam, and front beam of the HPC frame structure, respectively, and the joint bar Installs a sleeve joint that connects the main bars embedded inside the projected corner of the HPC pillar member from the outside.

(Braces of framing joints) If it is difficult to suspend and install the braces surrounding the joints, do not install them in the rebar cage and after the rebar cage is suspended and installed, The stirrup, which is divided into several parts, may be inserted into place of the joint and tightly connected to each other to be assembled.

(Temporary Frame at Corner) The joining of this main bar and the tight binding of the stirrup to this main bar are performed before the temporary frame is attached between the adjacent girders centering on the column of the joint. Work from the part. After the concrete has been cast, a temporary casting frame, which is made of a material which is integral with the concrete and which itself serves as a coating for the reinforcing bars, is attached to the HPC pillar member along the outer surface.

(Joining Reinforcing Bar Baskets) Reinforcing bar baskets are connected to each other by using a method of making a connecting rebar cage by connecting a reinforcing bar basket to the inside of an upper pillar bar cage and a lower bar bar cage, and an upper pillar. There is a method of narrowing down the cross section of either the squirrel cage or the lower sill cage and inserting it into the inside of the other reinforced cage to make a splice. For the main beam of Ohashi, a reinforcing bar cage for joints is hung between adjacent rebar cages to make a splice joint. The span of the rebar for the joint does not include the end of the girder, and the bottom rebar required for long-term loading is built into the HPC girder member, so the bottom rebar is usually unnecessary and only the top rebar can be bridged. Is enough.

(Concrete Casting) Concrete reinforcement is laid after completion of predetermined rebar arrangement such as reinforcing bars other than columns and girders, for example, upper end reinforcing bars of HPC floor slabs, but the ends of HPC columns and girder members are open. Since the interior is in communication with each other, in this case, it is possible to place concrete continuously to improve the work efficiency and ensure the integrity of the concrete. At this time, concrete using recycled aggregate can be placed in place of normal concrete.

(Joining the main bars of HPC pillar members) Next, H on the upper floor
The PC pillar member is built using a hoist, but at this time, the pillar bar of the assembled reinforcing bar projecting upward from the node at the built-up position is lowered so as to be inserted into the hollow portion of the HPC pillar member.
Further, the bottom protruding main bar of the HPC pillar member is joined to the top protruding main bar of the HPC pillar member on the lower floor by a sleeve joint.

[0030]

【Example】

(Outline) Referring to the drawings, an embodiment will be described with reference to FIG.
Is an explanatory view showing a construction method of the present invention, FIG. 2 is an elevation view showing an outline of a reinforced concrete structure, FIG. 3 is a plan view, in the figure, 1 is a foundation footing, 2 is an underground beam, 3 is Seismic Isolation Device, 4 is a column of the frame, 5 is a large beam of the frame, 6 is a floor slab of the structure, 55 is a joint of the frame, 14 is a central part of the column of the frame, 16
Is the middle part of the girder of the frame, and 17 is the central part of the girder of the frame.

(Splitting of HPC member) In order to construct this reinforced concrete structure, according to the construction method of the present invention, the concrete to be placed, the reinforced basket, the HPC framing, and the three elements of the reinforced concrete framing are used. Considering that, the HPC frame set is divided as shown in the elevation view showing the division and arrangement of the HPC frame set in FIG. 4 and the plan view in FIG. In the figure, 18 is an HPC pillar member, and 19 is an HPC girder member, and the HPC frame joints are divided so that the joints 11 and the adjacent joints 11 form one member.

(Division of Reinforcing Bar Basket) For the reinforcing bar cage, see FIG.
As shown in the plan view of FIG. 7 showing the division and arrangement of the rebar cages in FIG. 7, for each node, the column rebars are pulled up and down, and the girder rebars are pulled back and forth around the joint 55 of the frame. Then, the central portion 14 of the column of the frame, the intermediate portion 16 of the girder of the frame,
Divide by.

(Production of HPC pillar member) Divided HPC
The pillar member 18 is produced in a factory or on-site workshop as shown in the plan view of the HPC pillar member of FIG. 8, the elevation view of FIG. 9, the transverse sectional view of FIG. 10, and the longitudinal sectional view of FIG. . In the figure, 21
Is a cylindrical main body portion, 22 is a hollow portion of the HPC column member, 23 is an HPC column member main bar, 24 is a top protruding main bar, and 25 is a bottom protruding main bar. The HPC pillar member main bar 23 is tightly connected to the HPC pillar member stirrup 26,
Both are embedded in the concrete part 27 of the HPC pillar member, and 28 is the outer covering part of the HPC pillar member strip.
Reference numeral 9 denotes a covering portion around the main bars of the HPC column member, both of which have a thickness equal to or more than the legally required value.

(Production of HPC Large Beam Member) Divided HPC
As shown in the elevation view of the HPC girder member of FIG. 12, the same side view of FIG. 13, the cross-sectional view from the same elevation direction of FIG. 14, and the cross-sectional view of the same side direction of FIG. Produce in a factory or on-site workshop. In the figure, 31 is a gutter-shaped main body portion, 32 is a hollow portion of the HPC girder member, and 33 is an HPC.
This is the main bar for the large beam members. HPC girder member main bar 33 is HPC
They are tightly connected to the girder member ribs 36, and both are embedded in the concrete portion 37 of the HPC girder member, 38 is an outer covering portion of the HPC girder member ribs, and 39 is a covering portion around the HPC girder member main bar. Yes, both have a thickness greater than that required by law.

(Production of Reinforcing Bar Basket) The divided rebar baskets are produced in a factory or on-site workshop as shown in the elevation view showing the details of the reinforcing bar cage arrangement in FIG. 16 and the plan view in FIG. In the figure, 42 is the lower part of the upper pillar of the rebar cage, 43 is the upper part of the lower pillar, 44 is the left part of the right girder, 45 is the right part of the left girder, 46 is the part behind the front girder, 47 is the front part of the large beam behind the same. In addition, 40 is a bar girder of the rebar cage, 5
Reference numeral 0 is a rebar cage girder rib, 48 is a rebar cage pillar main bar, and 49 is a rebar cage main beam main bar.

(Installation of HPC pillar member)
First, the HPC pillar member 18 is built using a lifting machine (not shown). At this time, the lower part 42 of the upper pillar of the reinforcing bar cage projecting upward from the frame assembly node at the built-up position is replaced with the HPC pillar. It is lowered so as to be inserted into the hollow portion 22 of the member 18, and the bottom protruding main bar 25 of the HPC pillar member is joined to the top protruding main bar 24 of the HPC pillar member on the lower floor by the sleeve joint 53 of the HPC pillar member main bar.

(Hanging of HPC girder member) The HPC girder member 19 is hung and temporarily fixed on the HPC girder member temporary receiving member (not shown) previously attached to the HPC column member 18 by using a hoist. . The shape of the temporary receiving member is designed according to the actual conditions at the construction site.

(Attachment of HPC Floor Material) The HPC floor slab 54 is attached on the HPC girder member 19.

(Built-in Reinforcing Bar Basket) Reinforcing bar cage 41 is hung using a lifting machine, and the upper portion 43 of the lower pillar of the rebar cage is set to H
The right part 45 of the left girder of the rebar cage and the left part 44 of the right girder, the front part 47 of the rear girder and the rear part 46 of the front girder are respectively inserted into the hollow part 22 of the PC pillar member by HPC.
The left stirrup, the right stirrup, the rear stirrup, and the front stirrup of the contact points of the frame fit within the hollow portion 32 of the HPC girder member, and the stirrup of the joint is H.
The sleeve joint 53 of the PC column member main reinforcement is installed so as to surround it from the outside.

(Joining rebar cages) For columns, attach rebar cages 51 for joints that are inserted in the column rebar cages to the rebar cages of the lower columns so that a joint is made in the columns of the upper and lower rebar cages. Set aside the rebar cage on the upper floor with a lifting machine, and attach it so that the upper part of the joint rebar cage is housed inside the rebar cage lower pillar. Regarding the girders, only the upper end reinforcing bars of the girders are bridged with the joint reinforcing bars 52 at the intermediate portions of the adjacent girders to connect the adjacent reinforcing bar cages.

(Placement of concrete) Concrete is placed after completion of reinforcing reinforcements and other predetermined reinforcements at the joints of column girders, but the HPC column tops and HPC girder member ends are open and the inside is Since they are in communication, it is possible to place concrete continuously at one time to improve work efficiency and ensure concrete integrity.

(Step for Column Section) The above-described steps for column section are shown in FIG. 18, which is a transverse sectional view showing the bar arrangement of the column portion of the rebar cage, and the rebar cage of FIG. 19 is installed inside the HPC column member. The cross-sectional view of the pillar portion when the concrete is placed, and the cross-sectional view of the pillar portion when the concrete in FIG.

(Steps for cross-section of girder) The above-described steps for cross-section of girder are cross-sectional views from the lateral direction showing the reinforcement of the girder portion of the reinforcing bar cage in FIG. 21, and the reinforcing bar cage in FIG. 22 is HP.
The cross-sectional view from the side direction of the girder part when installed inside the C girder member, and the cross-sectional view from the side direction of the girder part when concrete of FIG. In the figure, 54 is an HPC floor slab, which is integrated with the girder by concrete pouring.

[0044]

Since the present invention is configured as described above, it brings about the following effects.

(Temporarily unnecessary) The HPC column member itself has the ability to withstand a vertical load, and the HPC girder member itself has the ability to withstand a vertical load as a simple beam.
The HPC framework assembled by these can handle the work load of floor slab, concrete, etc. on this. Further, since the HPC column member and the HPC girder member also serve as a temporary frame, the temporary frame and the temporary frame support work are unnecessary.

(Significant reduction of on-site work) Temporary frame support work and temporary frame installation work on site are absorbed in the work of the HPC manufacturing plant, and removal work is unnecessary. In addition, the on-site rebar assembly work will be replaced by the partial reassembly of pillar girder rebars at the factory and the large rebar cage assembly at the work site. Since the work is transferred to the factory or the site work site, the work site where the work environment at a high place is bad can be greatly reduced, the work environment can be improved, the safety can be secured, and the work efficiency can be improved.

(Efficient Transport of Materials) Since the scaffold, the temporary frame support work, and the temporary frame are scarcely used, the materials are hardly brought in and out, and wasteful transportation work can be eliminated. HPC pillar members, HPC girder members, HPC floor slab members,
The maximum weight of each unit of the rebar cage is usually within 2 tons, a large lifting machine is not necessary, and it can be lifted and transported by small and medium-sized lifting machines. At the same time, since the weight of each unit is leveled, the lifting machine can be operated efficiently. Next, since each unit is directly suspended by a lifting machine at a predetermined position, the lateral carrying work can be omitted. Since concrete pouring is completed once for each floor, efficient pouring work can be performed. As a whole, wasteful transportation is eliminated and efficient material transportation becomes possible.

(Reduction of construction period) Although some preparation period is required for designing and producing HPC members, on-site work is completed by carrying in and assembling HPC members and rebar cages, and arranging and placing concrete. As a result, it is possible to shorten the construction period of the frame work. Since the floor surface where concrete is poured and strength is developed is rarely used for the construction work of the frame on the upper floor, the work of finishing work, which is the next process, can be immediately started on this floor surface, which shortens the overall construction period. It will be possible.

The (strong parts) columns are composed of HPC column members,
It is a synthetic material with the reinforced concrete material in the hollow part, and the concrete is tightly bound by double stirrups. Large beam is H
It is a composite material of PC girder material and reinforced concrete material in its hollow part, and in part, concrete is bound by double ribs, and high toughness can be expected together. Also, the reinforcing bars of the joints are the main bars of the upper and lower columns, the left and right, and the main bars of the front and rear girders are pulled through and assembled in the rebar cage at the factory or workshop, so that the rebars can be placed and assembled accurately without congestion. I can. It is possible to construct a stronger and more reliable structure by arranging more reinforcing bars in an orderly manner and pouring concrete in a solid manner. Since the concrete at the joint is doubly restrained by the stirrups surrounding the outside of the sleeve joint that connects the internal main bars of the HPC pillar member and the stirrups that tightly connect the pillars of the rebar cage, the toughness of this part is high. .
Further, since the cross section of this portion is slightly larger than the cross section of the column, a large strength can be expected at the joint.

(Joining of rebar cages) Reinforcing bar cages are joined to each other at almost the center of the column. However, this portion has almost no bending moment due to horizontal force, and the corners of the HPC column member have already been joined. Since the main bar contained inside is pulled through, the main bar of the rebar cage does not need to be joined to transmit the entire strength, and a simple joining method, for example, a joining method using a reinforcing bar can be used. In the girder, it is joined near the middle part, but the bending moment due to horizontal force is sufficiently reduced in this part, and for a long-term bending moment, it has already been drawn into the lower corner of the HPC girder member. Furthermore, since the main reinforcement added as needed is built-in, the lower main reinforcement is unnecessary.For the upper main reinforcement, it is sufficient to arrange the reinforcing bar cage connecting muscles tied to the center by the ribs. is there.

(Generality of Technology) The method for constructing a reinforced concrete frame according to the present invention is a combination method of general technologies and does not require a special machine material technician. Since the structural design method can also be based on the conventional reinforced concrete structural design standard, the following combination method is possible.

(Structure having seismic isolation performance) A seismic isolation foundation having seismic isolation elements is constructed, and a skeleton structure is constructed on the reinforced concrete frame construction method, and reinforced concrete having seismic isolation performance as a whole. Build structures can be built. The seismic isolation structure is an excellent structure because it reduces the seismic force transmitted to the upper frame during an earthquake and protects people and objects inside the building, but it takes time to design and prepare, so
There was a drawback that the construction period was long and the construction cost increased.
By constructing the reinforced concrete framework on the seismic isolation foundation, it becomes possible to construct a structure having seismic isolation performance while suppressing the extension of construction period and increase in construction cost.

(PS concrete structure) In the present invention, in addition to a construction method using an HPC girder member in which ordinary structural reinforcing bars are used for main bars, PC steel wire or PC steel bar is used for main bars and prestress is applied. There is a construction method using the HPC girder member. The HPC girder member with PS added can withstand a large bending moment and can reduce the amount of deformation, but the manufacturing process is complicated and the production cost is high. Since the HPC girder can be handled in the frame according to the present invention in exactly the same manner as the HPC girder member having the structural reinforcing bar as the main bar,
It can also be used for a structure having a relatively long beam, or a structure having a relatively long beam, which is partially mixed in a relatively long space between beams in one structure.

(Structure of floor slab) In the present invention, in addition to using an HPC pillar member for a pillar and an HPC girder member for a girder, an HPC floor slab member is also used for a floor slab, which is produced at a factory or a site workshop, It is a construction method in which it is assembled in the place of, and the pre-assembled rebar cage is set up at the factory or the site workshop separately, the necessary reinforcement is done, and the concrete is placed, so from the pillar to the floor slab There is no need to use temporary materials such as scaffolding, formwork support, and formwork. Therefore, the labor, time, materials, etc. required for temporary frame support work and the installation and removal of temporary frames can be saved, and the work for constructing the frame can be saved by performing the reinforcing bar reinforcement assembly work in the factory or on the ground. A wider range of simplification and shortening of construction period is possible.

HPC columns and girder members are solid as a temporary frame,
Since it has good water retention performance and creates a good concrete curing environment, concrete using recycled aggregate produced from waste concrete generated at the construction site can be used for resource saving purposes.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a construction method of the present invention.

FIG. 2 is an elevational view showing an outline of a reinforced concrete structure.

FIG. 3 is a plan view showing an outline of a reinforced concrete structure.

FIG. 4 is an elevational view showing division and placement of an HPC framework.

FIG. 5 is a plan view showing division and arrangement of an HPC framework.

FIG. 6 is an elevational view showing division and arrangement of a reinforcing bar basket.

FIG. 7 is a plan view showing division and arrangement of a rebar cage.

FIG. 8 is a plan view of an HPC column member.

FIG. 9 is an elevational view of an HPC column member.

FIG. 10 is a cross-sectional view of an HPC column member.

FIG. 11 is a vertical cross-sectional view of an HPC column member.

FIG. 12 is an elevational view of an HPC girder member.

FIG. 13 is a side view of the HPC girder member.

FIG. 14 is a cross-sectional view of the HPC girder member from the vertical direction.

FIG. 15 is a cross-sectional view of the HPC girder material from the side direction.

FIG. 16 is an elevational view showing the details of bar arrangement of a reinforcing bar cage.

FIG. 17 is a plan view showing details of the reinforcing bar cage arrangement.

FIG. 18 is a transverse cross-sectional view showing the reinforcement of the pillar portion of the reinforcing bar cage.

FIG. 19 is a transverse cross-sectional view of a pillar portion when the rebar cage is installed inside the HPC pillar member.

FIG. 20 is a cross-sectional view of a pillar portion when concrete is poured.

FIG. 21 is a cross-sectional view from the side direction showing the reinforcement of the large beam portion of the reinforcing bar cage.

FIG. 22 is a cross-sectional view of the girder portion viewed from the side when the reinforcing bar cage is installed inside the HPC girder member.

FIG. 23 is a lateral cross-sectional view from the side direction of the girder portion when concrete is poured.

[Explanation of symbols]

 1 Foundation footing 2 Underground beam 3 Seismic isolation device 4 Column of frame 5 Beam of frame 5 Floor deck of structure 11 Node part of HPC frame 12 Upper end of column of frame 13 Lower end of column of frame 14 The center of the pillar of the framework 15 The end of the girder of the framework 16 The middle part of the girder of the framework 17 The center of the girder of the framework 18 HPC pillar members 19 HPC girder members 21 Cylindrical main body 22 HPC pillar members Hollow part 23 HPC pillar member main bar 24 Top protruding main bar 25 Bottom protruding main bar 26 HPC column member band bar 27 Concrete part of HPC column member 28 Overburden part of HPC column member bar bar 29 Overburden part around HPC column member bar bar 31 Trough-shaped main body part 32 HPC girder member hollow part 33 HPC girder member main bar 36 HPC girder member ribs 37 Concrete part of HPC girder member 38 Cover of outside ribs of HPC girder member Part 39 HPC Large beam part Covered part around the main bar 40 Reinforcing bar girder girder 41 41 Reinforcing bar cage Lower part of upper column of reinforcing bar cage 43 Upper part of lower column of reinforcing bar cage 44 Left part of right girder of reinforcing bar cage 45 Reinforcing bar Left part of girder left part of girder 46 Rear part of girder in front of rebar basket 47 Rear part of girder behind girder 48 Part of girder main bar of rebar basket 49 Main girder bar of girder bar 50 Bar girder rib of girder basket 51 Reinforcing bar girder pillar Main reinforcement joint reinforcement 52 Reinforcement cage girder main reinforcement joint reinforcement 53 HPC column member Main reinforcement sleeve joint 54 HPC floor slab 55 Frame joint

Claims (8)

[Claims] 1. A half-precast pillar member (18) and a half-precast (referred to as HPC) girder member (19) are produced in a factory or a work place, and these are connected at a node portion (11) of an HPC frame structure to produce an HPC structure. Assembled to the frame, apart from this, the main bar of the column is pulled up and down around the node up and down to the center of the column material and tied up with the tie bar, and the main bar of the girder is the girder material of the girder material around the node. The HPC of the HPC framework assembled by pulling it up to the middle part and tightly connecting it to the ribs, and pre-assembling it to the integrated rebar cage (41) on the ground.
C pillar member hollow part (22), HPC girder member hollow part (3
Installed in 2) and connecting adjacent rebar cages with each other by connecting the rebar cage pillar main bar joint rebar (51) and the rebar cage main beam main bar joint rebar (52), then the HPC column member hollow part of the HPC framework (22), A method for constructing a reinforced concrete framework, in which concrete is placed in the hollow portion (32) of the HPC girder member. 2. A foundation footing (1) an underground girder (2) and a foundation consisting of a seismic isolation device (3) and an underground girder are constructed at a predetermined position with a predetermined structure, and the method according to claim 1 is further formed thereon. A method of constructing a reinforced concrete structure having seismic isolation performance by constructing a reinforced concrete frame by. 3. In the process of constructing a reinforced concrete frame by the method of claim 1, prior to placing concrete, on the HPC girder member (19) of the HPC frame,
HPC floor slab member (54) or existing floor slab member and abandoned formwork are laid over, and after reinforcing bars necessary for the floor slab are arranged, HPC
A method for constructing a reinforced concrete structure, comprising placing concrete on the upper surface of the floor slab member (54), the HPC column member hollow part (22) and the HPC girder member hollow part (32) of the HPC framework. 4. The method according to claim 1, 2, or 3, wherein the concrete pouring includes pouring concrete using recycled aggregate. 5. The HPC pillar member main bar (23), which has an open top and a bottom, has a hollow portion (22) inside, and is arranged inside a projecting corner portion, as used in claim 1, 2, and 3. The column member stirrup (26) is tightly connected to each other, and the covering portion (29) around the HPC pillar member main bar (23) and the outer covering portion (28) of the HPC pillar member stirrup (26) are stipulated by law. The body part (2
Built in 1), the main bars at both ends are top projecting main bars (2
4), an HPC pillar member (1) which is continuous with the bottom protruding main bar (25) and has a tubular main body part (21) as a whole.
8). 6. The HPC girder for use in claim 1, 2, 3 having both ends and a top open, a hollow part (32) inside, and an inner corner of the lower part of the entire beam length section. Member main bar (3
3), and if necessary for bending moment due to long-term load, a main bar is additionally arranged below the middle part of the beam length, and the main bar and U-shaped HPC girder rib (3
6) Tighten, and the outer covering part of the HPC girder ribs (38)
The HPC girder main bar surroundings (39) is covered with concrete having a thickness greater than that specified by law, and the main body (3)
An HPC girder member (19) built in 1) and having a gutter-shaped main body (31) as a whole. 7. A PC steel wire or PC in place of the steel rod for reinforced concrete used for the main bar of the HPC girder member of claim 6.
Using a steel rod, both ends and the top are open, there is a hollow inside, and a PC steel wire or a PC steel rod is drawn through inside the projected corner portion on the lower side of the entire section of the beam length. Line or PC
The steel rod and U-shaped HPC girder member, which is open upwards, are tightly connected to each other, and the outer covering portion of the HPC girder rib and PC steel wire or P
Pre-stressed (called PS), which has a gutter-shaped body as a whole, with the surrounding covering part of the C steel rod covered with concrete having a thickness greater than that required by law and built into the body part.
HPC girder member. 8. The HP on the upper floor used in claim 1, 2, or 3.
Deformed bar in a cylindrical columnar sleeve with a cylindrical outer side and a tapered inner side for joining the bottom protruding main bar (25) of the C column member and the top protruding main bar (24) of the HPC column member on the construction floor Reinforcing bar joint (referred to as sleeve joint) that inserts the end of the and inserts high-strength grout material to join rebar
Place (53) at a predetermined position, insert the rebar cage (41), surround the sleeve joint (53) and arrange the stirrup, tightly connect both, and perform necessary reinforcement reinforcement around the sleeve joint. , Placing concrete so that these reinforcing bars have a concrete-covered structure with a thickness greater than that specified by law, and a joint between a pillar (4) of a frame and a girder (5) of a frame ( 55).