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

Abstract

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 placed in a pile hole in a building foundation. [Solution] The cage reinforcement of the pile is configured such that the interposed reinforcement is wound randomly around the inside of the cage reinforcement, which is toward the center of the interior of the cage reinforcement, or the outside, which is opposite the inside, or around the inside and outside, relative to the main reinforcement that will be located inside the excess reinforcement.

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 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). [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 the 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] (1) In pile cage reinforcement, Main reinforcement to be located inside the excess reinforcement Up and down direction In contrast, The interposition is on the inside, which is the inner center direction of the cage muscle, or on the outside, which is the opposite side of the inside, or randomly on the inside and the outside. in, Overall spiral or ring-shaped and multiple stages A cage reinforcement for a pile, characterized by being wrapped around it. ( 2 ) 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. ( 3 ) In pile cage reinforcement, Main reinforcement to be located inside the excess reinforcement Up and down direction In contrast, The interposition is made on the inside, which is the inner center direction of the cage muscle, or on the outside, which is the opposite side of the inside, or randomly on the inside and the outside. So, the whole is spiral to Or circular and multi-stage A method for manufacturing cage reinforcement for piles, characterized by wrapping the reinforcement. ( 4 ) The interposition is fixed to the main reinforcement with a binding wire ( 3 ) A method for manufacturing a cage reinforcement of a pile according to the present invention. ( 5 ) In pile cage reinforcement, Main reinforcement to be located inside the excess reinforcement Up and down direction In contrast, The interposition is made on the inside of the main reinforcement in the direction of the inner center of the cage reinforcement, or on the outside of the main reinforcement opposite the inside, or randomly on the inside and outside. So, the whole is spiral to Or circular and multi-stage winding A method for installing an internal reinforcement structure. ( 6 ) The interposition is fixed to the main reinforcement with a binding wire ( 5 ) A method for installing the excess reinforcement structure described in ( 7 ) (1) In removing the excess pile using the basket reinforcement of the pile described above, A pile head treatment method characterized by removing the excess reinforcement on the outside of the main reinforcement, and then using a core removal method to remove the excess reinforcement on the inside of the main reinforcement, 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 drilling machine and using a wedge and splitting machine to form blocks and remove them. [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] 1 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 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. [Figure 4] 1 is an explanatory diagram of a pile cage reinforcement 1b according to a second embodiment 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 5] This is a schematic cross-sectional view taken along the arrow BB in Figure 4. The hoop reinforcement 3 is shown with a dotted line to make the inclusions 5 easier to see. [Figure 6] 10 is an explanatory diagram of a pile cage reinforcement 1c according to a third embodiment 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 7] This is a schematic cross-sectional view taken along the CC arrow in Fig. 6. The hoop reinforcement 3 is shown with a dotted line to make the indentation 7 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 1 in the direction of the internal center and the outside.

[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 4a 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, the cost and workability will be poor. The width 4a 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 of the reinforcement and cost overall, being approximately 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 intervening reinforcements 4 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, and 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 optimum 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 about 1.5m long, and the intervening reinforcement 4 is spiral. article The wire is wound twice around the group of main reinforcement 2. The gap 4b is about 400 mm, and the width 4a of the gap is 150 mm.

[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] To remove the excess reinforcement formed on the cage reinforcement 1 of the pile thus formed, after peeling off the excess reinforcement on the outside of the main reinforcement 2, the excess reinforcement on the inside of the main reinforcement 2 is crushed with a hydraulic crushing large-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] The features of the first embodiment can be summarized as follows. (1) In pile cage reinforcement, The main reinforcement that will be located inside the excess reinforcement, 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 as a whole in the vertical direction of the main reinforcement that will be located inside the excess reinforcement. (3) The interposition moreover, The pile cage reinforcement described in (1) is characterized in that it is wrapped in multiple rows in a ring shape in the vertical direction of the main reinforcement that will be located inside the excess reinforcement. (4) 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. (5) The cage reinforcement of the pile 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 interposition is a resin hose. (7) The pile cage reinforcement described in (1) is characterized in that the intermediate member is a foldable resin hose. (8) The pile cage reinforcement according to (1), characterized in that the interposition is strip-shaped with a width of 25 mm to 300 mm. (9) In pile cage reinforcement, The main reinforcement that will be located inside the excess reinforcement, This method for manufacturing cage reinforcement of piles is characterized in that the interposition is wound alternately inward and outward in a staggered manner with respect to the inner center and outward direction of the cage reinforcement between adjacent main reinforcements. (10) In pile cage reinforcement, The main reinforcement that will be located inside the excess reinforcement, A method for installing an internal reinforcement structure 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. (11) In removing the excess pile of the pile using the cage reinforcement of the pile according to any one of (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. This becomes: [Example]

[0023] As shown in Figure 4-5, in the pile cage reinforcement 1b of the present invention, the interposed reinforcement 5 is wound spirally as a whole in the vertical direction on the outside, opposite to 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 interposed 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.

[0024] 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, and has the same effect of preventing reinforcement cracking and peeling as the filler 4 of Example 1, and is installed in the same manner as Example 1. The filler 5 has the same width 4a as Example 1, and the gap 4b between adjacent fillers 5 in the vertical direction is also the same as 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. [Example]

[0025] As shown in Figures 6-7, in the cage reinforcement 1c of the pile of the present invention, the intervening reinforcement 7 is wound in multiple stages in a ring shape 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 intervening 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.

[0026] 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. [Explanation of symbols]

[0027] 1. Basket Muscle 1a Pile cage reinforcement 1b Pile cage reinforcement 1c Pile cage reinforcement 2 Main reinforcement 2a Coating 3 Hoop muscles 4 intervention 4a width 4b Gap 5 intervention 5a end 6. End line 7. Intermediate 7a end

Claims

1. In pile cage reinforcement, In relation to the vertical direction of the main reinforcement that will be located inside the reinforcement, The interposition is on the inside, which is the inner center direction of the cage muscle, or on the outside, which is the opposite side of the inside, or randomly on the inside and the outside, A pile cage reinforcement characterized in that it is wound in a spiral or ring shape as a whole and in multiple stages.

2. 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.

3. In pile cage reinforcement, In relation to the vertical direction of the main reinforcement that will be located inside the reinforcement, This method for manufacturing cage reinforcement of piles is characterized in that the interposition is wound on the inside, which is toward the center of the cage reinforcement, or on the outside, which is opposite the inside, or randomly on the inside and outside, in a spiral or ring shape as a whole and in multiple stages.

4. The method for manufacturing cage reinforcement of a pile according to claim 3, characterized in that the interposition is fixed to the main reinforcement with a binding wire.

5. In pile cage reinforcement, In relation to the vertical direction of the main reinforcement that will be located inside the reinforcement, A method for installing an internal reinforcement structure, characterized in that the interposition is wound around the inside of the main reinforcement, which is toward the internal center of the cage reinforcement, or the outside of the main reinforcement, which is opposite the inside, or randomly around the inside and outside, in a spiral or ring shape as a whole and in multiple stages.

6. A method for installing a reinforcement inner structure according to claim 5, characterized in that the interposition is fixed to the main reinforcement with a binding wire.

7. In removing the excess reinforcement of the pile using the basket reinforcement of the pile according to claim 1, A pile head treatment method characterized by removing the excess reinforcement on the outside of the main reinforcement, and then using a core removal method to remove the excess reinforcement on the inside of the main reinforcement, 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 drilling machine and using a wedge and splitting machine to form blocks and remove them.

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