Cage reinforcement for pile, method for manufacturing same, method for installing excess fill internal structure, and pile head processing method

Abstract

[Problem] To provide a cage reinforcement for a pile, a method for manufacturing the same, a method for installing an excess fill internal structure, and a pile head processing method in order to, when removing (pile head processing) an upper portion (excess fill) of a concrete pile poured into a pile hole in a building foundation, facilitate pulverization, detachment, and retrieval of excess fill. [Solution] Provided is a configuration of cage reinforcement for a pile that is characterized in that, with reference to main reinforcement located inside of excess fill, inclusions are wound on the inner side of the cage reinforcement in the inner central direction or on the outer side which is the side of the cage reinforcement opposite from the inner side thereof, or are randomly wound on the inner side and the outer side.

Description

Pile cage reinforcement, its manufacturing method, method for installing extra reinforcement structure, and pile head treatment method

[0001] The present invention relates to pile cage reinforcement, its manufacturing method, a method for installing an internal structure for excess reinforcement, and a pile head processing method, which facilitate the crushing, peeling, and removal of the upper part (excess reinforcement) of a concrete pile that is cast into a pile hole in a building foundation (pile head processing).

[0002] As shown in Figure 1, a pile is constructed by pouring concrete into a cage reinforcement 1 made up of vertically arranged main reinforcement 2 and horizontally arranged hoop reinforcement 3 (ties) perpendicular to the main reinforcement, and the top of the pile is called "excess reinforcement." This is impurities such as slime and sludge mixed in the poured concrete that float and solidify. This part is necessary to ensure the quality and strength of the buried pile, and is removed after the pile has solidified. The removal of excess reinforcement is called pile head treatment (Non-Patent Document 1).

[0003] As explained in Non-Patent Document 1, methods for treating the pile head include cutting the edges around the bottom of the excess fill with a cutter and manually crushing it (chipping with a hand breaker, etc.), using the solidification and expansion of a liquid to separate the excess fill and pulling it out with a crane (core removal method, Non-Patent Document 2), and static crushing methods (inducing cracks by passing electricity or using chemicals).

[0004] Normally, each of the main reinforcement bars in the excess reinforcement portion is wrapped in cloth (coating 2a), mainly to protect the main reinforcement bars from scratches during chipping and to prevent rust due to the exposed main reinforcement bars after the excess reinforcement is removed.

[0005] On the other hand, foamed polyurethane covers that are placed over the main reinforcement bars to facilitate the extraction of the excess reinforcement are known (Non-Patent Document 3). While these are convenient for separating the excess reinforcement from the main reinforcement and making it easier to extract, most pile heads in foundation construction are unable to be accessed by large cranes due to the large area, the reach of the crane's arm, or the weight required to lift the piles being too heavy. Furthermore, the cost of using such covers is high. Furthermore, even when using a hand breaker or hydraulic crushing / shredding machine, there is not much difference in the way the piles are broken with or without the cover, and using a cover on the main reinforcement does not significantly improve crushing efficiency.

[0006] https: / / www.rise-jms.jp / media / kensetsu_yougo / a764https: / / www.toda.co.jp / news / 2023 / 20230925_003260.htmlhttps: / / www.yo-jo.jp / item / md1434https: / / metoree.com / categories / 7657 / https: / / aka-bane.com / products / detail.php?product_id=4356&gad_source=1&gclid=CjwKCAiAiP2tBhBXEiwACslfnlJ0SLF83M4NYDLNihCLfhW-Js_KwXc7g4kpGPYettL145VQx8FAExoCjEwQAvD_BwE

[0007] Therefore, the object of the present invention is to provide pile cage reinforcement, a manufacturing method thereof, a method for installing an internal structure for excess reinforcement, and a pile head processing method to facilitate crushing, peeling, and removal of the excess reinforcement when removing (pile head processing) the top part (excess reinforcement) of a concrete pile that is cast into a pile hole in a building foundation.

[0008] In order to solve the above problems, the present invention provides: (1) a cage reinforcement of a pile, characterized in that the intervening wire is wound around the main reinforcement to be located inside the reinforcement reinforcement, in a staggered pattern, alternately on the inside and outside of adjacent main reinforcement reinforcement relative to the center of the cage reinforcement and the direction toward the outside of the cage reinforcement. (2) a cage reinforcement of a pile, characterized in that the intervening wire is wound around the main reinforcement to be located inside the reinforcement reinforcement, either on the inside toward the center of the cage reinforcement reinforcement, or on the outside opposite to the inside, or randomly on the inside and the outside. (3) a cage reinforcement of a pile as described in (1) or (2), characterized in that the intervening wire is further wound spirally as a whole in the vertical direction of the main reinforcement to be located inside the reinforcement reinforcement. (4) a cage reinforcement of a pile as described in claim 1 or claim 2, characterized in that the intervening wire is further wound in a ring shape in multiple stages in the vertical direction of the main reinforcement to be located inside the reinforcement reinforcement. (5) The cage reinforcement of a pile according to (1) or (2), characterized in that the gap between adjacent infills in the vertical direction is a distance that allows concrete to flow in. (6) The cage reinforcement of a pile according to (5), characterized in that the gap is in the range of 100 mm to 500 mm. (7) The cage reinforcement of a pile according to (1) or (2), characterized in that the infill is a resin hose. (8) The cage reinforcement of a pile according to (1) or (2), characterized in that the infill is a foldable resin hose. (9) The cage reinforcement of a pile according to (1) or (2), characterized in that the infill is in the form of a strip with a width of 25 mm to 300 mm. (10) A manufacturing method for cage reinforcement of a pile, characterized in that the infill is wrapped around main reinforcements that will be located inside the excess reinforcement in a staggered pattern, with the infill wound alternately inward and outward relative to the inner center and outward direction of the cage reinforcement between adjacent main reinforcements. (11) A method for manufacturing cage reinforcement of a pile, characterized in that in the cage reinforcement of a pile, the filler is wound around the main reinforcement that will be located inside the excess reinforcement, either on the inside toward the center of the cage reinforcement, or on the outside opposite to the inside, or randomly around the inside and the outside. (12) A method for manufacturing cage reinforcement of a pile as described in (10) or (11), characterized in that the filler is fixed to the main reinforcement with a binding wire.(13) A method for installing an internal reinforcement structure for a pile cage reinforcement, characterized in that, for main reinforcements to be located inside the reinforcement, fillers are wound alternately in a staggered pattern on the inside and outside of adjacent main reinforcements relative to the center of the cage reinforcement and the direction to the outside of the cage reinforcement. (14) A method for installing an internal reinforcement structure for a pile cage reinforcement, characterized in that, for main reinforcements to be located inside the reinforcement, fillers are wound on the inside of the main reinforcement, which is toward the center of the cage reinforcement, or on the outside of the main reinforcement, which is opposite to the inside, or randomly on the inside and the outside. (15) A method for installing an internal reinforcement structure for a pile cage reinforcement, characterized in that the fillers are fixed to the main reinforcement with binding wires. (16) A pile head treatment method for removing excess reinforcement from a pile using the cage reinforcement of a pile described in (1) or (2), characterized in that after peeling off the excess reinforcement on the outside of the main reinforcement, the excess reinforcement on the inside of the main reinforcement is removed by a core removal method, or by crushing the excess reinforcement with a hydraulic crushing and splitting machine and / or a hand breaker, or by drilling holes in the excess reinforcement with a boring machine and using a wedge and a splitting machine to form blocks and remove them.

[0009] The present invention, with its configuration as described above, has the following advantages: It can provide pile cage reinforcement, a manufacturing method thereof, a method for installing an internal structure for the reinforcement, and a pile head processing method that facilitate the crushing, peeling, and removal of the upper part (excess reinforcement) of a concrete pile cast into a pile hole in a building foundation (pile head processing).

[0010] This is an explanatory diagram of a conventional cage reinforcement 1. This is an explanatory diagram of a cage reinforcement 1a of a pile according to a first embodiment of the present invention. The main reinforcement 2 and its covering 2a are shaded differently to make it easier to distinguish between the front and back. This is a schematic cross-sectional view taken along the arrows A-A in Figure 2. Note that the hoop reinforcement 3 is shown with a dotted line to make the interposition 4 more visible. This is an explanatory diagram of a cage reinforcement 1b of a pile according to a second embodiment of the present invention. The main reinforcement 2 and its covering 2a are shaded differently to make it easier to distinguish between the front and back. This is a schematic cross-sectional view taken along the arrows B-B in Figure 4. Note that the hoop reinforcement 3 is shown with a dotted line to make the interposition 5 more visible. This is an explanatory diagram of a cage reinforcement 1c of a pile according to a third embodiment of the present invention. The main reinforcement 2 and its covering 2a are shaded differently to make it easier to distinguish between the front and back. This is a schematic cross-sectional view taken along the arrows C-C in Figure 6. Note that the hoop reinforcement 3 is shown with a dotted line to make the interposition 7 more visible.

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the following examples.

[0012] As shown in Figure 2-3, the pile cage reinforcement 1a of the present invention is formed by winding the interposed reinforcement 4 around the group of main reinforcements that will be located inside the excess reinforcement in a staggered pattern between adjacent main reinforcements 2, 2, alternately on the inside and outside of the cage reinforcement 1 in the direction from the center of the cage reinforcement 1 to the outside.

[0013] By providing the interposition 4, when the excess reinforcement is crushed and chipped with a hand breaker and / or a hydraulic crushing and breaking machine, the cracking direction near the main reinforcement 2 proceeds in the direction of an imaginary circle connecting the main reinforcement 2, improving crushing efficiency and facilitating separation of the excess reinforcement from the main reinforcement, and the excess reinforcement tends to be cracked into a size and shape that is easy to remove.

[0014] Furthermore, it is desirable that the filler 4 is wound spirally in the up and down direction as a whole around the main reinforcement 2 that will be located inside the excess reinforcement. Since only one filler 4 is wound, the installation work is easy, and the excess reinforcement is crushed efficiently and the crushed material can be easily removed.

[0015] On the other hand, the fillers 4 may be ring-shaped and installed with gaps in multiple rows above and below the main reinforcement 2 that will be located inside the reinforcement. If the fillers 4 can expand and contract, they can be locked at the desired position, making subsequent fixing work easier.

[0016] Examples of the interposer 4 include cloth and hose, with strip-shaped hoses being particularly desirable. Examples of the hose include resin hoses, with foldable resin hoses being particularly suitable, and as described in Non-Patent Documents 4 and 5, "Sunnyhose" (registered trademark), a multipurpose hose made from chemical fiber and soft vinyl chloride, is known.

[0017] Foldable plastic hoses are used as low-pressure hoses for drainage work in areas with little elevation difference, agricultural watering, etc. Their thickness and material give them strength and chemical resistance, making them suitable for civil engineering work, drainage, and the spraying of liquid fertilizer and pesticides. Foldable plastic hoses eliminate the hassle of reeling them up, and can be folded up small and stored compactly after use, making them ideal from the standpoints of cost, strength, transportation, ease of use, and storage.

[0018] As the width 4a of the intervening member 4, the one supplied as "Sunny Hose" (registered trademark) (Non-Patent Document 5) can generally be used, but if the width is too thin, the effect of cracking in two directions of the main reinforcement will be small, and if it is too thick, the cost and workability will be poor. The width 4a of the intervening member 4 is preferably 25 mm to 300 mm, more preferably 50 mm to 300 mm, and even more preferably 100 mm to 300 mm, with the optimal range taking into consideration the cracking direction and cracking pattern of the reinforcement and cost overall being about 150 mm to 300 mm. The thickness is not particularly limited as long as it has the strength to withstand concrete pouring.

[0019] The gap 4b between adjacent fillers 4 in the vertical direction is the distance that allows concrete to flow in. If the gap is too narrow, concrete cannot enter or exit, creating a space that prevents the reinforcement from fully functioning; if it is too wide, the crack direction and crack pattern will be less effective in facilitating chipping. Specifically, the gap 4b is preferably 100mm to 500mm, and the optimal range, taking into consideration the crack direction and pattern of the reinforcement and cost, is 100mm to 200mm. In Figure 2, the main reinforcement 2 that will be located inside the reinforcement is approximately 1.5m long, and the filler 4 is wound around the group of main reinforcement 2 in a spiral fashion, two times. The gap 4b is approximately 400mm, and the width 4a of the filler is 150mm.

[0020] The interposition member 4 may be wrapped around the cage reinforcement 1 in advance in a factory when the cage reinforcement 1 is assembled, or may be wrapped around the cage reinforcement 1 at the concrete pile installation site, or the interposition member 4 may be installed after the cage reinforcement 1 is inserted into the pile hole and before the concrete pile is installed.

[0021] The excess reinforcement formed on the cage reinforcement 1 of the pile thus formed is removed by peeling off the excess reinforcement on the outside of the main reinforcement 2, and then crushing the excess reinforcement on the inside of the main reinforcement 2 with a hydraulic crushing and splitting machine and / or a hand breaker, or by drilling holes in the excess reinforcement with a drilling machine and using a wedge and splitting machine to form blocks for removal. The presence of the interposition 4 makes it easy to crush, peel off, and remove the excess reinforcement.

[0022] As shown in Figures 4-5, in the pile cage reinforcement 1b of the present invention, the intervening reinforcement 5 is wound spirally as a whole in the vertical direction on the outside, opposite the inner center direction of the cage reinforcement 1, around the main reinforcement groups that would be located inside the excess reinforcement in the conventional cage reinforcement 1. Note that the position of the intervening reinforcement 5 relative to the main reinforcement groups may be on the outside, on the inside toward the inner center, or randomly on the inside and outside, which is different from the staggered winding in Example 1.

[0023] Furthermore, the filler 5 of Example 2 is made of the same material and has the same physical properties as the filler 4 of Example 1, has the same effect of preventing reinforcement cracking and peeling as in Example 1, and is installed in the same manner as in Example 1. The filler 5 has the same width 4a as in Example 1, and the gap 4b between adjacent fillers 5 in the vertical direction is also the same as in Example 1. Furthermore, when the filler 5 is fixed to the main reinforcement 2 at several points with binding wires 6, it can withstand concrete pouring and is easy to work with. The end portions 5a are wrapped around the main reinforcement 2 and fixed with binding wires 6.

[0024] As shown in Figures 6-7, in the pile cage reinforcement 1c of the present invention, the interposing reinforcement 7 is wound in a loop shape in multiple stages in the upper direction on the inside, i.e., toward the center of the cage reinforcement 1, around the main reinforcement groups that would be located inside the excess reinforcement in the conventional cage reinforcement 1. The position of the interposing reinforcement 7 relative to the main reinforcement groups may be on the outside, opposite the inside, or may be wound randomly on the inside and outside, which is different from the staggered winding in Example 1, in addition to the inside.

[0025] The filler 7 of Example 3 is made of the same material and has the same physical properties as the filler 4 of Example 1, and like the filler 4, has the effect of preventing reinforcement cracking and peeling described in Example 1, and is installed in the same manner as Example 1. The filler 7 has the same width 4a as in Example 1, and the gap 4b between adjacent fillers 7 in the vertical direction is also the same as in Example 1. Furthermore, when the filler 7 is fixed to the main reinforcement 2 at several points with binding wires 6, it can withstand concrete pouring and is easy to work with. The ends 7a of the filler 7 are gathered together and fixed to the main reinforcement 2 with binding wires 6.

[0026] 1 Cage reinforcement 1a Pile cage reinforcement 1b Pile cage reinforcement 1c Pile cage reinforcement 2 Main reinforcement 2a Covering 3 Hoop reinforcement 4 Interposition 4a Width 4b Gap 5 Interposition 5a End 6 Binding wire 7 Interposition 7a End

Claims

1. A pile cage reinforcement characterized in that the main reinforcement bars that will be located inside the reinforcement are wrapped around adjacent main reinforcement bars in a staggered pattern, alternately on the inside and outside of the cage reinforcement, relative to the center and outside of the cage reinforcement.

2. A pile cage reinforcement characterized in that the interposed reinforcement is wound around the main reinforcement that will be located inside the excess reinforcement, either on the inside toward the center of the cage reinforcement, or on the outside opposite the inside, or randomly around the inside and outside.

3. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the interposition is further wound spirally as a whole in the vertical direction of the main reinforcement that will be located inside the excess reinforcement.

4. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the interposition is further wound in a ring shape in multiple layers in the vertical direction of the main reinforcement that will be located inside the excess reinforcement.

5. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the gaps between adjacent intervening members in the vertical direction are of a distance that allows concrete to flow in.

6. The pile cage reinforcement described in claim 5, characterized in that the gap is in the range of 100 mm to 500 mm.

7. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the interposition is a resin hose.

8. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the interposition is a foldable resin hose.

9. A pile cage reinforcement as described in claim 1 or claim 2, characterized in that the interposition is strip-shaped with a width of 25 mm to 300 mm.

10. A method for manufacturing cage reinforcement of piles, characterized in that the interposed reinforcement is wound around the main reinforcement that will be located inside the excess reinforcement in a staggered pattern, with adjacent main reinforcement members wound alternately inward and outward relative to the center and outward direction of the cage reinforcement.

11. A method for manufacturing cage reinforcement of a pile, characterized in that, in the cage reinforcement of a pile, the intervening reinforcement is wound around the main reinforcement that will be located inside the excess reinforcement, either on the inside toward the center of the cage reinforcement, or on the outside opposite the inside, or randomly around the inside and outside.

12. A method for manufacturing cage reinforcement for piles as described in claim 10 or 11, characterized in that the interposition is fixed to the main reinforcement with a binding wire.

13. A method for installing a reinforcement structure within a pile cage, characterized in that the interposed reinforcement is wrapped around the main reinforcement that will be located inside the reinforcement, with adjacent main reinforcement members wrapped alternately in a staggered pattern on the inside and outside of the cage reinforcement, relative to the center and outside of the cage reinforcement.

14. A method for installing a reinforcement structure within a pile cage, characterized in that the interposed reinforcement is wrapped around the main reinforcement that will be located inside the reinforcement, either inside the cage, toward the center of the cage, or outside the main reinforcement that is opposite the inside, or randomly around the inside and outside.

15. A method for installing a reinforcement structure according to claim 13 or claim 14, characterized in that the interposition is fixed to the main reinforcement with a tie wire.

16. A pile head treatment method for removing excess reinforcement from piles using cage reinforcement as described in claim 1 or claim 2, characterized in that after peeling off the excess reinforcement on the outside of the main reinforcement, the excess reinforcement on the inside of the main reinforcement is removed by a core removal method, or by crushing the excess reinforcement with a hydraulic crushing and splitting machine and / or a hand breaker, or by drilling holes in the excess reinforcement with a boring machine and using a wedge and splitting machine to form blocks for removal.

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