Pile cage reinforcement, manufacturing method thereof, method for installing internal structure for excess reinforcement, and pile head processing method

Abstract

To provide a 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) a top part (excess reinforcement) of a concrete pile that is placed in a pile hole in a building foundation.SOLUTION: A pile cage reinforcement is configured such that an interposed reinforcement is wound around a main reinforcement to be located inside an excess reinforcement in a staggered pattern between adjacent main reinforcements alternately inside and outside of an internal center and outside of the cage reinforcement.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[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 are used to easily crush, peel, and remove the excess reinforcement when removing the top part (excess reinforcement) of a concrete pile that is cast into a pile hole in a building foundation (pile head processing). [Background technology]

[0002] As shown in Figure 1, a pile is constructed by pouring concrete into a cage reinforcement 1, which is made up of vertically placed main reinforcement 2 and horizontally placed hoop reinforcement 3 (ties) perpendicular to the main reinforcement, and the top of the pile is called "excess reinforcement." This is made up of impurities such as slime and sludge that were mixed in the poured concrete and floated to the surface and solidified. 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 pile 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 pile and pulling it out with a crane (core removal method, Non-Patent Document 2), and static crushing methods (inducing cracks using electricity or chemicals).

[0004] Normally, each of the main reinforcement bars in the excess reinforcement section is wrapped in cloth (coating 2a), mainly to protect the main reinforcement bars from scratches during chipping and to prevent rust due to the main reinforcement being exposed 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 excess reinforcement are known (Non-Patent Document 3). While this is convenient for separating excess reinforcement from the main reinforcement and making it easier to extract, foundation construction often involves large areas where the crane's arm cannot reach, or the lifting weight is too heavy, making it impossible to use a large crane at most pile heads. Furthermore, the cost of using such covers is high. Furthermore, even when using a hand breaker or hydraulic crushing and breaking machine, there is not much difference in the way the pile breaks with or without the cover, and using a cover on the main reinforcement does not significantly improve crushing efficiency. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] https: / / www.rise-jms.jp / media / kensetsu_yougo / a764 [Non-patent document 2] https: / / www.toda.co.jp / news / 2023 / 20230925_003260.html [Non-patent document 3] https: / / www.yo-jo.jp / item / md1434 [Non-patent document 4] https: / / metoree.com / categories / 7657 / [Non-Patent Document 5] https: / / aka-bane.com / products / detail.php?product_id=4356&gad_source=1&gclid=CjwKCAiAiP2tBhBXEiwACslfnlJ0SLF83M4NYDLNihCLfhW-Js_KwXc7g4kpGPYettL145VQx8FAExoCjEwQAvD_BwE Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the objective of this 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. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides (1) In the cage reinforcement of piles, the main reinforcement that will be located inside the reinforcement is The cage reinforcement of the pile is characterized in that the interposition of adjacent main reinforcements is wound alternately inward and outward in a staggered pattern with respect to the inner center and outward direction of the cage reinforcement. (2) The interposition moreover, The pile cage reinforcement described in (1) is characterized in that it is wound spirally in the vertical direction around the main reinforcement that will be located inside the reinforcement. (3) The cage reinforcement of piles described in (1) is characterized in that the gaps between adjacent piles in the vertical direction are of a distance that allows concrete to flow in. (4) The cage reinforcement of the pile according to (1), characterized in that the gap is in the range of 100 mm to 500 mm. (5) The pile cage reinforcement described in (1) is characterized in that the interposition is a resin hose. (6) The pile cage reinforcement described in (1) is characterized in that the intermediate member is a foldable resin hose. (7) The pile cage reinforcement according to (1), characterized in that the interposition is strip-shaped with a width of 25 mm to 300 mm. (8) This method for manufacturing cage reinforcement of a pile is characterized in that, in the cage reinforcement of a pile, the interposing piece is wound around the main reinforcement to be located inside the excess reinforcement, and the adjacent main reinforcement pieces are wound alternately in a staggered pattern on the inside and outside of the cage reinforcement with respect to the inner center and the outer direction of the cage reinforcement. (9) This method for installing a structure inside the excess reinforcement is characterized in that, in the cage reinforcement of a pile, the interposition is wound around the main reinforcement that will be located inside the excess reinforcement, with adjacent main reinforcement members alternately wound in a staggered pattern on the inside and outside of the cage reinforcement from the center inside to the outside. (10) In removing the excess reinforcement of a pile using the cage reinforcement of the pile according to any one of claims 1 to 7, A pile head treatment method characterized by using a core removal method or crushing and removing excess pile with a hydraulic crushing and large breaking machine and / or a hand breaker. The structure is as follows. [Effects of the Invention]

[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). [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is an explanatory diagram of a conventional cage bar 1. [Figure 2] This is an explanation of the cage reinforcement 1a of the pile of the present invention. The main reinforcement 2 and its covering 2a are given different shades to make it easier to distinguish between the front and back. [Figure 3] This is a schematic cross-sectional view taken along the line AA in Figure 2. The hoop reinforcement 3 is shown with a dotted line to make the indentation 4 easier to see. DETAILED DESCRIPTION OF THE INVENTION

[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. [Example]

[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's internal center and outward direction.

[0013] By providing the interposition 4, when the excess reinforcement is crushed and chipped with a hand breaker and / or 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 making it easy to peel the excess reinforcement from the main reinforcement, and it also tends to crack 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 filler 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 filler 4 can expand and contract, it can be locked in the desired position, making subsequent fixing work easier.

[0016] Examples of the filler 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, known examples include "Sunnyhose" (registered trademark), a multipurpose hose made from chemical fiber and soft vinyl chloride.

[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 use in civil engineering works, as well as for spraying 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, transport, ease of use, and storage.

[0018] The width of the filler 4 can generally be that supplied as "Sunny Hose" (registered trademark) (Non-Patent Document 5), but if the width is too thin, the effect of splitting the main reinforcement in two directions will be small, and if it is too thick, costs and workability will be poor. The width of the filler 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 direction and type of cracking in the reinforcement and costs 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 vertically adjacent fillers 4 is the distance that allows concrete to flow in. If the gap is too narrow, concrete cannot enter or exit, creating a void 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, crack pattern, and cost of the reinforcement, 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 filler width 4a is 150mm.

[0020] The interposition member 4 may be wrapped around the cage reinforcement 1 in advance in the factory when it 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 pile cage reinforcement 1 thus formed is crushed and removed using a hydraulic crushing machine and / or a hand breaker. The presence of the interposition 4 makes it easy to crush, peel off and remove the excess reinforcement. [Explanation of symbols]

[0022] 1. Basket Muscle 1a Pile cage reinforcement 2 Main reinforcement 2a Coating 3 Hoop muscles 4 intervention 4a width 4b Gap

Claims

1. In the cage reinforcement of piles, the main reinforcement that will be located inside the reinforcement is The cage reinforcement of the pile is characterized in that the interposition of adjacent main reinforcements is wound alternately inward and outward in a staggered pattern with respect to the inner center and outward direction of the cage reinforcement.

2. The interposition moreover, 2. The pile cage reinforcement according to claim 1, characterized in that the reinforcement is wound spirally in the vertical direction around the main reinforcement that will be located inside the excess reinforcement.

3. The pile cage reinforcement according to claim 1, characterized in that the gaps between adjacent piles in the vertical direction are of a distance that allows concrete to flow in.

4. The pile cage reinforcement according to claim 1, characterized in that the gap is in the range of 100 mm to 500 mm.

5. The pile cage reinforcement according to claim 1, characterized in that the interposition is a resin hose.

6. The pile cage reinforcement according to claim 1, characterized in that the intermediate member is a foldable resin hose.

7. The pile cage reinforcement according to claim 1, characterized in that the interposition is strip-shaped with a width of 25 mm to 300 mm.

8. This method for manufacturing cage reinforcement of a pile is characterized in that, in the cage reinforcement of a pile, the interposing piece is wound around the main reinforcement to be located inside the excess reinforcement, and the adjacent main reinforcement pieces are wound alternately in a staggered pattern on the inside and outside of the cage reinforcement with respect to the inner center and the outer direction of the cage reinforcement.

9. This method for installing a structure inside the excess reinforcement is characterized in that, in the cage reinforcement of a pile, the interposition is wound around the main reinforcement that will be located inside the excess reinforcement, with adjacent main reinforcement members alternately wound in a staggered pattern on the inside and outside of the cage reinforcement from the center inside to the outside.

10. In removing the excess pile of the pile using the cage reinforcement of the pile according to any one of claims 1 to 7, A pile head treatment method characterized by using a core removal method or crushing and removing excess pile with a hydraulic crushing machine or / and a hand breaker.

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