JP2002013138A - Main reinforcement positioning ring member, and construction method of installing cage having the ring member disposed therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily insert and dispose a beam main reinforcement between the main reinforcements of a cage without moving the position of the beam main reinforcement or without bending or cutting the thick main reinforcement of the cage, and position the cage with the main reinforcement disposed position taken into account when the cage is installed. SOLUTION: In this cage installation method, a cage guide member having the groove part of an inside guide member facing inside is fixed to the upper end part of a casing member disposed in a cut hole at the hole walls opposed to each other, a guide plate is inserted movably in the vertical direction and disposed in the groove part, the projected side end part of the guide plate is fixed to a peripheral edge part forming a main reinforcement space of a cage ring member disposed in the cut hole, and the centering and positioning in the circumferential direction are performed by the cage guide member and the guide plate and the cage is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete cage which is a framework of a so-called reinforced concrete structure such as a pile foundation or a reinforced concrete foundation pile, an underground wall, a retaining wall, a building wall, and a method of installing the reinforced cage. About.

[0002]

2. Description of the Related Art There are various types of reinforced concrete structures such as pier foundations, foundation piles, underground walls, retaining walls, building walls, and the like. A basket frame is provided. Taking a cast-in-place reinforced concrete foundation pile as an example, a reinforced cage arranged in the skeleton of the reinforced concrete foundation pile is:
It comprises a main bar arranged in the longitudinal direction, a ring member serving as a reinforcing bar connected to the main bar, and a hoop bar wound around the main bar. Further, spacers are provided on the outer peripheral portion at appropriate intervals as needed.

[0003] After the reinforcing means is assembled and installed in a predetermined place, the reinforcing cage is then cast with concrete so as to bury the reinforcing means, and the reinforcing means and the concrete are integrated to provide a large yield strength. The building foundation is completed. In the above technique, the assembled reinforcing cage is disposed in a borehole, and is connected to an underground beam or the like at an upper portion thereof to be integrally formed. In order to make the cage diameter as small as possible and to compensate for it, the amount of reinforcing bars in the reinforcing bar cage is increased. Further, the beam width of an underground beam or the like connected to the reinforcing bar cage is similarly narrowed, and the amount of reinforcing bars is increased within the beam width.

On the other hand, at the time of installation of the reinforcing rod cage, for example, a predetermined distance between the reinforcing rod cage and the drilled hole wall is determined by a spacer fixed to a main reinforcing bar, a hoop reinforcing bar or the like of the reinforcing rod cage. I was deciding the installation position,
No consideration was given to the relationship between the reinforcing bars and the beam main bars when the reinforcing bars were installed and fixed. Reinforcing bars and beams that are connected and integrated as described above both have a large amount of reinforcing bars,
When the reinforcing bar and the beam are integrated, the main bar of the beam is inserted into a gap between the main bars that are fixed upright around the reinforcing bar. However, as described above, since there is a large amount of reinforcing bars in both the reinforcing bar and the beam, it has been difficult to insert the beam main bar between the main bars of the reinforcing bar. For this reason, there is a problem that the main beam is moved and the main bar of the reinforcing bar is bent or cut to insert the main beam.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and can be easily performed without shifting the position of the thick main bar or bending or cutting the thick reinforcing bar main bar. It is an object of the present invention to enable a beam main reinforcement to be inserted between the main reinforcements of a reinforcing bar cage. at the same time,
An object of the present invention is to position a reinforcing bar cage in consideration of an arrangement position of a main bar when installing the reinforcing bar cage.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an annular shape, in which a suitable number of main-bar guide holes for fitting main bars are provided on the peripheral edge of the main-bar guide hole. And a main bar positioning ring member formed by fitting a main bar into the main bar guide hole to form a reinforcing bar cage. Further, the main bar positioning ring member also serves as reinforcing means of the reinforcing bar cage.

Further, in a rebar cage positioning member installed at an upper end of a casing member provided in the drilling, the inner guide member has a groove on the outside thereof so as to open toward the core of the drilling. The groove portion is characterized in that one end portion is fixed to a ring member of the reinforcing bar cage, and the other end portion is a movable portion of a guide plate inserted and arranged in the groove portion. Further, the invention is characterized in that a reinforcing bar guide member is provided in which an outer supporting member is attached to the outer side of the upper end portion of the inner guide member, and fixing means detachably fixed to the casing member are formed on both side surfaces thereof.

Further, at the upper end of the casing member provided in the hole, a reinforcing bar guide member having the groove portion of the inner guide member facing inward is fixed to the opposing hole wall, and the guide plate is vertically inserted into the groove portion. Movably inserted and fixed to the periphery of the reinforcing bar cage ring member, which is disposed in the hole, as the main bar gap, and the projecting side end of the guide plate is fixed to the reinforcing bar cage guide member and the guide plate. Thus, the present invention is characterized in that the reinforcing cage is installed by mounting the reinforcing cage in such a manner that the reinforcing cage is centered and circumferentially aligned. Further, the invention is characterized by a method of installing a reinforcing bar cage in which the reinforcing bar guide member is detachably attached to a casing member by fixing means formed on the head thereof. Further, the reinforcing bar guide member is
The other reinforcing bar cage guide members are respectively disposed on the opposing hole walls orthogonal to each other at a position which becomes the reinforcing bar core of a line connecting the two reinforcing bar guide members, and are disposed opposite to the hole wall which is to be installed. The method is characterized by the installation method of the reinforced cage.

In addition, a mark is formed in advance on the periphery of the ring member located at the uppermost position at a position facing the center of the reinforcing bar cage, and on the other hand, on the head of the reinforcing bar guide member fixed at the position facing the hole wall. Also, a mark is formed at a position corresponding to the center of the reinforcing bar cage, and each mark of the ring member of the uppermost reinforcing bar basket is made to coincide with each mark of the reinforcing bar center position of the head of the reinforcing bar guide member. The reinforcing bar is moved back and forth, left and right or in the circumferential direction, and one end of the guide plate is fixed between the main bars at the peripheral edge of the ring member in the aligned state, and the other end is inserted and arranged in the groove of the reinforcing bar guide member. The method is characterized in that the reinforcing cage is mounted at a predetermined position by the guide plate thus formed. Further, the present invention is characterized by a method of installing a reinforcing bar cage in which beam main reinforcing bars are inserted or disposed between main reinforcing bars of the reinforcing bar cage.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In a reinforced basket A such as a pillar foundation according to the present invention, the position where the main reinforcing bar 1 is provided is calculated in advance on a desk, and the position of the main reinforcing bar 1 is connected to the reinforced basket A in an integrated manner. It is set by design at a position that does not coincide with the direction in which the main beam 2 extends from the beam, such as an underground beam, into the reinforced cage A. It is necessary to secure a predetermined interval between the main reinforcing bars 1 and 1 so that the main reinforcing bars 2 can be inserted and extended between the main reinforcing bars 1 and 1 of the reinforcing bar A. Therefore, a ring member 3 for positioning the main reinforcing bar 1 shown in FIG. 1 is employed so that a predetermined interval can be secured between the main reinforcing bars 1 and the interval between the main reinforcing bars 1 according to the position where the beam main reinforcing bar 2 is inserted. The ring member 3 is made of an angle steel material or the like as shown in FIG. 1A, and is formed in an annular shape as a whole in this embodiment. When connected to the main reinforcing bar 1, it also serves as a reinforcing material, and serves as a reinforcing bar in the reinforcing bar cage A.

[0011] The ring member 3 is provided on the peripheral portion thereof at appropriate intervals.
An appropriate number of main bar guide holes 4 for disposing the main bar 1 are formed. The position of the main bar guide hole 4 is calculated in advance on a desk so that the beam main bar 2 is inserted into the gap between the main bars 1 of the reinforcing bar cage A, and the arrangement thereof is designed in consideration of the position of the beam main bar 2. The main reinforcement 1 is provided on the ring member 3 so that the main reinforcement 1 can be easily disposed.
Is formed, and the opening thereof is formed toward the outer side of the circumferential portion, and is formed at an appropriate position in consideration of the beam main reinforcement 2. Therefore, the main bars are not always arranged at equal intervals.

As shown in FIG. 1 (b), the ring member 3 is composed of a web 3a and upper and lower flanges 3b which are vertically connected with angled L-shaped steel members 3 ', 3'. Toward it, it is formed in an annular shape as a whole. The angle steel members 3 ', 3' are mutually welded or welded between the webs 3a, 3a via an attachment plate (not shown) or the like, or joined by bolts and nuts. In addition, 2
Instead of using one angle steel material, various modes are conceivable, such as forming the angle steel material 3 ″ alone as shown in FIG. 1C or using a U-shaped shape material.

The main bar guide hole 4 has a main bar 1 therein.
(In some cases, two main reinforcements may be provided.) It has a size that can be arranged, and the hole spacing is designed in advance corresponding to the position of the beam main reinforcement 2 inserted into the reinforcing bar cage A as described above. Formed on top. As shown in FIG. 2, the main bar 1 is inserted into the main bar guide hole 4 of the ring member 3 from the outside thereof, and the main bar 1 and the ring member 3 are welded at the contact position. The welding can also be performed via a locking fitting 5 separately attached to the main bar 1.

The main bar 1 is attached to a predetermined position of the ring member 3, and a hoop 6 is mounted from the outer periphery of the main bar 1. The rebar basket A is formed as described above.
Hereinafter, the assembly of the reinforcing rod cage A will be described in detail along the steps.

The main bar 1 at the position where the main bar 1 intersects with the ring member 3 is marked by appropriate means. An appropriately-shaped locking metal fitting 5 is provided at the location where the mark of the main reinforcement 1 is provided,
From the side of the box to fit the mark. The main reinforcement 1 to which the locking metal 5 is fixed is laterally provided, the ring member 3 is brought into contact with the position of the locking metal 5 on the main reinforcing bar 1, and the ring member 3 and the locking metal 5 are welded. For welding, an appropriate means such as spot welding or full-surface welding is selected.

As described above, the main bar 1 is attached to the predetermined position around the ring member 3 via the locking fitting 5.
The number of the main bars 1 differs depending on the size of the rebar basket A to be completed. In the case of the large-diameter steel cage A, the number increases, and in the case of the small-diameter steel cage A, the number decreases. afterwards,
The hoop 6 is wound around the outer periphery of the main bar 1, and the main bar 1 and the hoop 6 are connected by a binding wire or the like.

The hoop muscle 6 is wound around the main muscle 1,
They are arranged at regular intervals in the axial direction of the reinforcing bar cage A. In the present embodiment, the reinforcing bars are formed in a single ring shape, and are arranged in parallel with each other in the axial direction of the reinforcing bar cage A at predetermined intervals. The intervals between the hoop bars 6 are densely arranged at the upper position of the reinforcing bar cage A, and sparsely arranged at the lower position of the reinforcing bar cage A. As one embodiment, one straight bar is bent in an annular shape around the main bar, and both ends are press-welded or non-welded,
The intersection with the main bar 1 is connected by an iron wire, a clamp or the like.

The rebar basket A formed as described above is
A reinforcing rod cage guide member for disposing the cylindrical casing member 7 in the drilling hole B and inserting the reinforcing rod cage A into the upper end of the casing member 7 is to be disposed in the drilling hole B formed in advance. 8 is attached. As shown in FIGS. 3A, 3B, and 3C, the reinforcing bar guide member 8 is
At the upper end of the The rebar cage guide member 8 in this embodiment includes an elongated inner guide member 9 of an H-shaped steel, an outer support member 10 made of a similar H-shaped steel material connected to the inner guide member 9 at an upper portion thereof, and the rebar. Inner fixing means 11 for attaching and fixing the basket guide member 8 to the casing member 7;
It is formed by the outer fixing means 12.

The inner guide member 9 and the outer support member 10
Are formed of H-section steel, and flange portions are connected to each other at the upper end to be integrated. At this time, a gap X substantially corresponding to the thickness of the casing member 7 is formed below and connected between the inner guide member 9 and the outer support member 10. The inner fixing means 11 and the outer fixing means 12 are formed to face each other at the position where the gap X is formed. The inner fixing means 11 and the outer fixing means 1
Reference numeral 2 denotes support members 13 and 14 which are respectively raised from flange portions of the H-section steel, and bolts 15 and 16 which are formed so as to be able to move in and out through the support members 13 and 14. In the present embodiment, fixing means 11 and 12 are formed at upper and lower two places on both the inside and outside.

The reinforced cage guide member 8 having the above configuration is
The casing member 7 can be fixed to the casing member 7 by inserting the leading edge portion of the casing member 7 into the gap X, dropping it by a predetermined length, and tightening the bolts 15 and 16 from the inside and the outside, respectively. Therefore, the groove 17 surrounded by the web of the H-section steel and the flange is formed toward the inside of the hole B. In the present embodiment, four reinforcing bar cage guide members 8 formed and fixed as described above are installed at opposing positions where the peripheral wall of the hole B is divided into approximately four parts.

The rebar cage guide member 8 is installed at the four positions at the upper end of the drilled wall as described above. First, as shown in FIG. The basket guide members 8a and 8b are set so that the line connecting them passes through the core of the reinforcing bar cage A (hereinafter referred to as a reinforcing bar core core). Thereafter, the reinforced cage guide member 8a,
Other reinforcing bar cage guide members 8c and 8d are respectively installed at two locations on the opposing hole wall at a position perpendicular to the reinforcing bar cage core and the reinforcing bar cage core 8b. Therefore, the center of the reinforcing bar guide members 8a and 8b and the center of the reinforcing bar guide members 8c and 8d intersect at the center of the reinforcing bar cage A. The reinforcing bar guide member 8
On the heads a to 8d, the center of the reinforcing bar A obtained by the above method is marked.

Reinforced basket A assembled on the ground,
The rebar basket A provided at the bottom is connected and built so that the position of the main bar 1 is matched with the position of the main bar 1 set at the top. The reinforcing bar cage A is sequentially connected, and the reinforcing member cage A is supported by a crane or the like until the position of the ring member 3 of the reinforcing bar basket A located at the uppermost position is slightly lower than the head of the reinforcing bar cage guide member 8. Hanging down. In accordance with the positions where the marks are provided on the heads of the reinforcing bar cage guide members 8a to 8d, a water thread is stretched between the reinforcing bar cage guide members 8a to 8d at the opposing positions. On the other hand, a mark is formed in advance on the periphery of the ring member 3 at a position located along the center of the reinforcing bar cage A in accordance with the installation position of the main reinforcing bar.
The reinforcing rod basket A is moved in the front-rear, left-right and circumferential directions so that the position of the water thread between the heads and the position of the mark on the peripheral edge of the ring member of the reinforcing rod basket A are respectively adjusted.

At the position where the mutual marks coincide with each other, one end of a flat or rod-shaped guide plate 18 is fixed between the main reinforcing bar guide holes 4 at the peripheral edge of the ring member 3 of the reinforcing bar cage A. Is inserted and arranged in the groove 17 of the rebar cage guide member 8. Since the width of the insertion portion is formed to be substantially the same as the width of the groove 17, the cage A moves downward along the groove 17 without shifting in the circumferential direction. Becomes possible. The guide plate 18 has one end portion fitted into the groove portion 17 as described above and the width thereof is substantially the same, but the side fixed to the ring member 3 may have a narrow width. This is because, depending on the arrangement position of the main bar 1 attached to the main bar guide hole 4 of the ring member 3, if the width is wide, it may be difficult to fix the guide plate 18. Guide plate 18
Various shapes such as a T-shaped shape, an L-shaped shape, a flat plate shape, and a rod shape are employed.

In this embodiment, the number of the guide plates 18 is equal to the number of the reinforcing cage guide members 8 attached to the casing member 7, and is formed at four locations. After that, the reinforcing bar cage A is lowered along the reinforcing bar guide member 8 to a predetermined depth of the hole B, and is fixed at a predetermined position. After the concrete is cast to a predetermined depth, the rebar cage guide member 8 is removed from the casing member 7 and pulled out. The reinforcing bar guide member 8 can be used repeatedly. According to the above-described process, the reinforcing rod cage A is disposed at a predetermined position of the drill hole B as originally designed, and therefore, the main reinforcing bar 1 attached to the ring member 3 is also disposed and fixed at the position as originally designed. .

FIGS. 5 and 6 are plan views showing the relationship between the reinforcing bar cage A installed in the predetermined drilling B and the underground beam connected and integrated. The rebar cage A is to be disposed at a predetermined position of the drill hole B by the above process as originally designed, and the main reinforcement 1 is also disposed as originally designed. As shown in (1), the beam main reinforcement 2 can be inserted and arranged in the reinforcing bar cage A.

Embodiment 1 FIG. 5 shows a location where a drilled hole B in which a reinforcing bar cage A is disposed and a root cutout portion C in which an underground beam is formed are orthogonal to an L-shape. The underground beam has a skeleton formed at the root cutting portion C. The beam main reinforcements 2 are arranged at appropriate intervals in the skeleton,
The end side is inserted into the reinforcing bar cage A. As described above, the reinforcing rod cage A is fixed at a position where the main reinforcing bar 1 does not come into contact with the beam main reinforcing bar 2 according to the design calculated on the desk in advance. Even if it is inserted into the reinforcing bar A, the beam main bar 2 does not come into contact with the main bar 1 and can be inserted and arranged in the reinforcing bar A as it is or penetrated to the opposite side as designed. . This is the same for the beam main reinforcement 2 of another underground beam that is orthogonal.

Embodiment 2 FIG. 6 shows a location where a drilled hole B in which a reinforcing rod cage A is provided and a root cut portion C in which an underground beam is formed are orthogonal to a T-shape. Similarly to the above, the beam main reinforcements 2 of the underground beams are inserted and arranged in the reinforcing bar cage A at predetermined intervals, but without contact with the main reinforcing bar 1 as designed on the desk, A can be inserted or penetrated.

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical concept of the present invention. That is, the following embodiments are included in the technical scope of the present invention. 1) The main bar positioning ring member may be of various shapes such as a flat plate, a U-shape, an L-shape, and the material is not limited to steel, but may be other materials such as synthetic resin, It can be made of fiber reinforced plastic (FRP). In the case of the synthetic resin or FRP, these are connected not only to the main bar 1 but also to a hanging bracket, a spacer (not shown), and the like by non-welding means. Further, in the present embodiment, an annular member is used as the ring member. However, the ring member is not limited to the annular member, but may have various shapes.

2) Although the above embodiment has been described based on the example of the construction of the reinforced concrete pile, the application to the steel pipe concrete pile can be similarly performed in the foundation pile. That is, in the steel pipe concrete pile, a mode in which the reinforcing rod cage A is disposed outside the steel pipe, a mode in which the reinforcing rod basket A is disposed inside the steel pipe,
There is a mode in which a steel pipe having substantially the same diameter and the steel cage A are vertically connected to the steel cage A, and the present invention is also applied to these.

3) In addition to the above 2), the application of the foundation structure to underground walls (including ready-made reinforced concrete walls, cast-in-place underground continuous walls, etc.) is also performed in accordance with the above. In addition to the basic structure, it is applied to retaining wall structures and building walls.

[0031]

As described above, the present invention adopts the main reinforcing bar positioning ring member, so that the position of the main reinforcing bar of the reinforcing bar cage does not coincide with the position of the beam main reinforcing bar incorporated in the reinforcing bar cage. It became possible to fix the main bar in the reinforcing bar at the position. Further, the present invention adopts a reinforcing bar cage guide member for installation of the reinforcing bar cage, so that the reinforcing bar is positioned at a predetermined position of the drill hole, and the position of the main reinforcing bar fixed to the reinforcing bar cage is a position designed in advance on a desk. It can be installed and fixed in a street. Therefore, it is possible to insert and dispose the main reinforcement of the beam integrated with the rebar cage in the same designed position as above, and it is possible to obtain the strength as originally designed.

[Brief description of the drawings]

FIG. 1A is a plan view of a ring member of the present invention. (B) Cross-sectional view of the ring member of the present invention. (C) Sectional view of another embodiment of the ring member of the present invention.

FIG. 2 is a perspective view of a reinforcing rod cage.

FIG. 3A is a front view of a reinforcing bar guide member. (B) A side view of a reinforcing bar guide member. (C) A cross-sectional view showing an installed state of a reinforcing bar cage using a reinforcing bar guide member.

FIG. 4 is a plan view showing an installed state of a reinforcing rod cage.

FIG. 5 is a plan view showing a relationship between an installation state of a reinforcing bar cage and a beam main bar of an underground beam.

FIG. 6 is a plan view of another embodiment showing a relationship between an installation state of a reinforcing bar cage and a beam main bar of an underground beam.

[Explanation of symbols]

 A ・ ・ Reinforcing cage B ・ ・ Hole 1 ・ ・ Main bar 2 ・ ・ Main beam bar 3 ・ ・ Ring member 3 '・ ・ Angle steel material 4 ・ ・ Main bar guide hole 5 ・ ・ Locking bracket 6 ・ ・ Hoop bar 7 ・ ・ Casing Member 8 Reinforcing cage guide member 9 Inner guide member 10 Outer support member 11 Inner fixing means 12 Outer fixing means 13, 14 Support member 15, 16 Bolt 17 Groove 18 ··Guide plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04G 21/12 105 E04G 21/12 105A

Claims (9)

[Claims] 1. A main ring guide hole for fitting an appropriate number of main reinforcements is formed in an annular shape with the opening side of the main reinforcement guide hole facing outward, and the main reinforcement is fitted and fixed in the main reinforcement guide hole. A main bar positioning ring member characterized by forming a reinforcing bar cage. 2. The main-bar positioning ring member according to claim 1, wherein the main-bar positioning ring member also serves as reinforcing means for the reinforcing bar cage. 3. A rebar cage positioning member installed on a hole wall at an upper end portion of a casing member disposed in a drilling, wherein an inner guide member is provided on an outer side thereof so as to open toward a hole core in the drilling. A grooved portion, one end of which is fixed to a ring member of a reinforcing cage, and the other end of which is a movable portion of a guide plate inserted and arranged in the groove. . 4. An outer supporting member is mounted on the outer side of the upper end portion of the inner guide member, and fixing means which are removably fixed to the casing member are formed on both side surfaces of the outer supporting member. A reinforced cage guide member as described. 5. A rebar cage guide member having a groove portion of an inner guide member facing inward at an upper end portion of a casing member provided in a drilled hole, and is fixed to each opposing hole wall, and a guide plate is vertically inserted into the groove portion. Movably inserted and fixed to the periphery of the reinforcing bar cage ring member, which is disposed in the hole, as the main bar gap, and the projecting side end of the guide plate is fixed to the reinforcing bar cage guide member and the guide plate. A method of installing a reinforcing bar, wherein the reinforcing bar is mounted by centering and circumferentially positioning the reinforcing bar. 6. The method according to claim 5, wherein the reinforcing cage guide member is detachably attached to the casing member by fixing means formed on the head thereof. 7. A rebar cage guide member is disposed opposite to a hole wall which is provided as a rebar cage core to be installed, and an opposing hole wall which is orthogonal to a line connecting the two rebar cage guide members at a position which becomes a rebar cage core. 7. The method according to claim 5, wherein another reinforcing bar guide member is disposed on the reinforcing bar. 8. A mark is formed in advance on the periphery of the ring member located at the uppermost position at a position facing the center of the reinforcing bar cage, and on the other hand, on the head of the reinforcing bar guide member fixed at the facing position of the hole wall. Also, a mark is formed at a position corresponding to the center of the reinforcing bar cage, and each mark of the ring member of the uppermost reinforcing bar basket is made to coincide with each mark of the reinforcing bar center position of the head of the reinforcing bar guide member. The reinforcing bar is moved back and forth, left and right or in the circumferential direction, and one end of the guide plate is fixed between the main bars at the peripheral edge of the ring member in the aligned state, and the other end is inserted and arranged in the groove of the reinforcing bar guide member. The method according to any one of claims 5 to 7, wherein the reinforcing cage is attached to a predetermined position by a guide plate formed. 9. The method according to claim 5, wherein main beams of the reinforcing bars are inserted or disposed between the main bars of the reinforcing bars.