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

Abstract

To provide pile cage reinforcement, a manufacturing method thereof, a method for installing an inner structure of an excess pile, and a pile head processing method, in order to facilitate crushing, peeling, and removal of the excess pile when removing the top part (excess pile) of a concrete pile that is cast into a pile hole of a building foundation (pile head processing). [Solution] The pile cage reinforcement is configured such that the interposed reinforcement is wound alternately inward and outward in a staggered pattern around the main reinforcement that will be located inside the excess reinforcement between adjacent main reinforcements with respect to the inner center and outer direction of the cage reinforcement.

Description

[Technical field]

[0001] The present invention relates to pile cage reinforcement, its manufacturing method, a method for installing the inner structure of the excess pile, and a pile head processing method, which facilitate the crushing, peeling, and removal of the excess pile when removing the upper part (excess pile) 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, in a pile, concrete is poured into a cage reinforcement 1 consisting of main reinforcement 2 arranged vertically and hoop reinforcement 3 (hoop reinforcement) arranged horizontally perpendicular to the main reinforcement, and the top of the pile is called "excess reinforcement", which is impurities such as slime and sludge mixed in the poured concrete that float and collect and solidify, and 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 pile head treatment 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 core removal method (Non-Patent Document 2) to separate the excess pile using the solidification and expansion of the liquid and pulling it out with a crane, and static crushing methods (inducing cracks using electricity or chemicals).

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

[0005] On the other hand, a polyurethane foam cover is known that is placed over the main reinforcement bars to make it easier to pull out the excess reinforcement bars (Non-Patent Document 3). Although this is convenient for peeling off the excess reinforcement bars from the main reinforcement bars and making them easier to pull out, most pile heads in foundation construction work cannot be used with large cranes because the crane's arm cannot reach the area or the lifting weight is too heavy. In addition, the cost of using such a cover is high. Furthermore, even if a hand breaker or hydraulic crushing and splitting machine is used, there is not much difference in the way the bars are broken with or without a cover, and using a cover on the main reinforcement bars does not significantly improve the 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 the present invention is to provide pile cage reinforcement, a manufacturing method thereof, a method for installing the inner structure of the excess pile, and a pile head processing method in order to facilitate crushing, peeling, and removal of the excess pile when removing the upper part (excess pile) of a concrete pile that is cast into a pile hole in a building foundation (pile head processing). [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides (1) In the case of pile cage reinforcement, the main reinforcement that will be located inside the reinforcement is This pile cage reinforcement is characterized in that the interposition is wound alternately inward and outward in a staggered pattern with respect to the inner center and outer direction of the cage reinforcement between adjacent main reinforcements. (2) The interposition, moreover, The above Main reinforcement to be located inside the excess of Up and down 、 Overall spiral shape Rolled up The pile cage reinforcement described in (1) is characterized in that it is attached. (3) The interposition, moreover, The pile cage reinforcement described in (1) is characterized in that it is wrapped in a ring shape in multiple rows in the vertical direction of the main reinforcement that will be located inside the excess reinforcement. ( 4 ) The pile cage reinforcement described in (1) is characterized in that the gap between adjacent piles in the vertical direction is a distance that allows concrete to flow in. ( 5 ) The pile cage reinforcement according to (1), characterized in that the gap is in the range of 100 mm to 500 mm. ( 6 ) The pile cage reinforcement described in (1) is characterized in that the intermediate layer is a plastic hose. ( 7 ) The pile cage reinforcement described in (1) is characterized in that the intermediate member is a foldable plastic hose. ( 8 ) The pile cage reinforcement according to (1), characterized in that the inclusion is strip-shaped with a width of 25 mm to 300 mm. ( 9 ) This method for manufacturing cage reinforcement of piles is characterized in that, in the cage reinforcement of piles, the intermediate reinforcement is wound around the main reinforcement to be located inside the excess reinforcement, and the adjacent main reinforcements are wound in a staggered pattern alternately on the inside and outside with respect to the inner center and the outside direction of the cage reinforcement. ( 10 ) This method of installing a structure inside a pile cage is characterized in that, in the cage reinforcement of a pile, the intermediate reinforcement is wound around the main reinforcement that will be located inside the reinforcement, and the adjacent main reinforcement is wound in a staggered pattern alternately on the inside and outside of the cage reinforcement with respect to the inner center and the outer side of the cage reinforcement. ( 11 ) (1) ~ (8) Either 1 In removing the excess pile using the cage reinforcement of the pile described in 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 composition is as follows. Effect of the Invention

[0009] The present invention, being configured as described above, has the following effects: That is, it is possible to provide pile cage reinforcement, a manufacturing method thereof, a method for installing an inner structure for excess reinforcement, and a pile head processing method, in order to facilitate crushing, peeling, and removal of the excess reinforcement when removing (pile head processing) the upper part (excess reinforcement) of a concrete pile that is cast into a pile hole of a building foundation. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is an explanatory diagram of a conventional cage bar 1. [Diagram 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 shading to make it easier to distinguish between the front and the back. [Diagram 3] This is a schematic cross-sectional view taken along the line AA in Fig. 2. Note that the hoop reinforcement 3 is shown with a dotted line so that the indentation 4 can be easily seen. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0012] As shown in Figure 2-3, the pile cage reinforcement 1a of the present invention is configured such that in the conventional cage reinforcement 1, the interposition 4 is wound around the group of main reinforcements that will be located inside the reinforcement, and adjacent main reinforcements 2, 2 are wound in a staggered pattern alternately on the inside and outside of the cage reinforcement's internal center and outside direction.

[0013] By providing the intermediate portion 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 the 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 to wind the filler 4 in a spiral shape in the vertical 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 excess reinforcement. If the filler 4 can expand and contract, it can be locked at the desired position, making subsequent fixing work easier.

[0016] Examples of the intermediate part 4 include cloth and hose, and a strip-like hose is particularly preferable. Examples of the hose include resin hoses, and foldable resin hoses are particularly preferable. As described in Non-Patent Documents 4 and 5, "SunnyHose" (registered trademark), a multipurpose hose made of chemical fiber and soft polyvinyl chloride, is known.

[0017] Foldable plastic hoses are used as low-pressure hoses for drainage work in places with little elevation difference, agricultural watering, etc. Due to their thickness and material, they have strength and chemical resistance, making them suitable for drainage in civil engineering works and for spraying liquid fertilizer and pesticides. Foldable plastic hoses eliminate the trouble of winding them up, and can be folded up small and stored compactly after use, making them ideal from the standpoints of cost, strength, transportation, workability, and storage.

[0018] The width of the spacer 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 cracking in two directions of the main reinforcement is small, and if it is too thick, the cost and workability are poor. The width of the spacer 4 is preferably 25mm to 300mm, more preferably 50mm to 300mm, and even more preferably 100mm to 300mm, and the optimal range taking into consideration the cracking direction and cracking style of the excess reinforcement and the cost is about 150mm to 300mm. The thickness is not particularly limited as long as it has the strength to withstand pouring of concrete.

[0019] The gap 4b between adjacent vertically adjacent spaces 4 is the distance through which concrete can flow. If the gap is too narrow, concrete cannot enter or exit, creating a space that does not fully function as a reinforcement, and if it is too wide, the direction and shape of the cracks will not be effective in facilitating chipping. Specifically, the gap 4b is preferably 100mm to 500mm, and the optimal range, taking into consideration the direction and shape of the cracks in the reinforcement and the cost, is 100mm to 200mm. In Figure 2, the main reinforcement 2 that will be located inside the reinforcement is about 1.5m long, and the space 4 is wound around the group of main reinforcement 2 in a spiral shape, two times. The gap 4b is about 400mm, and the width 4a of the space 4 is 150mm.

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

[0021] The excess reinforcement formed in the pile cage reinforcement 1 thus formed is crushed and removed by a hydraulic crushing and breaking 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 Muscles 1a Pile cage reinforcement 2 Main reinforcement 2a Covering 3 Hoop Muscles 4 intervention 4a width 4b Gap

Claims

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

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

3. The intervention comprises: moreover, The pile cage reinforcement according to claim 1, characterized in that the reinforcement is wound in a ring shape in multiple rows in the vertical direction of the main reinforcement that will be located inside the excess reinforcement.

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

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

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

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

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

9. This method for manufacturing cage reinforcement of piles is characterized in that, in the cage reinforcement of piles, the intermediate reinforcement is wound around the main reinforcement to be located inside the excess reinforcement, and the adjacent main reinforcements are wound in a staggered pattern alternately on the inside and outside with respect to the inner center and the outside direction of the cage reinforcement.

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

11. In removing the excess pile using the pile cage reinforcement according to any one of claims 1 to 8, 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.

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