JP2016180266A - Pile cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adopt screw reinforcements as main reinforcements of a pile cage and to thereby enable two main reinforcements of the pile cage to be coupled by a screw joint.SOLUTION: A main reinforcement 11 of a pile cage 10 is constituted of a screw reinforcement. Plural main reinforcements 11, 11... are arranged with intervals in a circumferential direction of an annular reinforcement frame 13. Holding members 30 are arranged on the reinforcement frame 13, and each holding member 30 holds the main reinforcement 11 in axially displaceable and axially rotatable manners. A regulation member 20 is provided at an upper end part of the main reinforcement 11, and by hooking the regulation member 20 to the holding member 30, downward displacement of the main reinforcement 11 is restricted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pile reinforcing bar to be a reinforcing bar assembly of a pile, and more particularly to a pile reinforcing bar to which a screw reinforcing bar is applied as a main reinforcing bar.

  This type of pile reinforcing bar is constituted by arranging a plurality of vertical main bars in an annular manner spaced from each other in the circumferential direction of a horizontal annular reinforcing frame (stress). The main bar is held by the reinforcing frame, and the entire shape of the pile reinforcement bar is held in a cylindrical shape (see Patent Document 1). Generally, the reinforcing frame is formed in an annular shape by curving an angle member having an L-shaped cross section along the longitudinal direction. The main bars are attached to the outer peripheral surface of the reinforcing frame, and the main bars are fastened to the reinforcing frame with U-shaped bolts. Further, a hoop line is wound around the plurality of main bars. The hoop bars and the main bars are connected by welding, for example. Therefore, the main bar, the reinforcing frame, and the hoop bar are rigidly coupled so as not to move relative to each other.

  When connecting two pile reinforcement rods in the vertical direction, for example, the ends of the main reinforcements of these pile reinforcement rods are overlapped by the required length (for example, about 2 m) and joined by wire binding or welding. doing.

JP2013-122121A

  In the conventional structure described above, the substantial length of each pile rebar is shortened by the amount of overlap between the ends of the main bars of the two pile rebars, and the length of the main rebar is wasted. It is also conceivable to connect the main bars of the two pile reinforcing bar rods with a cylindrical threaded joint by configuring the main bars with screw bars. In this case, it is necessary that the screw threads of the two main bars to be connected are arranged on a common spiral line. However, as described above, in the conventional structure, the main bars of each pile reinforcement bar, the reinforcing frame, and the hoop bars cannot move relative to each other. Therefore, any two main bars in the two pile reinforcement bars are common to each other. Even if it can be arranged and connected on the spiral line, it is difficult to arrange other main muscles on the common spiral line. Therefore, the connection by the threaded joint has been difficult.

  In view of the above circumstances, an object of the present invention is to employ a screw reinforcing bar as a main reinforcing bar of a pile reinforcing bar so that the main reinforcing bars of the two reinforcing bars can be reliably connected by a screw joint.

In order to solve the above problems, the present invention provides
A plurality of main bars made of screw rebars, oriented in parallel with each other in an axis, and arranged annularly at intervals from each other;
A reinforcing frame formed in an annular shape along the alignment direction of the main bars,
A plurality of members arranged at intervals in the alignment direction, i.e., the circumferential direction of the reinforcing frame, and holding members corresponding to the reinforcing frame so as to be displaceable in the axial direction and rotatable about the axis;
A restricting member that is provided at an end of the main reinforcing bar that protrudes toward the first side in the axial direction from the reinforcing frame, and that restricts displacement of the main reinforcing bar to the second side in the axial direction by being caught by the holding member. It is characterized by having and.
According to this pile reinforcement bar, by moving the main bar relatively axially or rotating around the axis line, the main bar screw thread and the main bar screw thread of other pile bar bar to be connected Can be arranged on a common spiral line. As a result, these main bars can be reliably connected to each other by the threaded joint. Even if the main bar can be displaced with respect to the reinforcing frame, the displacement can be regulated by the regulating member. Thereby, when the pile reinforcing bar is suspended with the first side in the axial direction facing up and the second side facing down, it is possible to prevent the main bars from falling. Furthermore, the holding member can also be used as a receiving member that hooks the regulating member and receives the load of the main reinforcement. There is no need to provide a dedicated receiving member separately, and the number of parts can be reduced.

It is preferable that the restricting member is a cylindrical threaded joint that can be screwed into the threaded reinforcing bar.
Main bars arranged in a straight line between adjacent pile reinforcement rods can be connected by the threaded joint. This threaded joint can also be used as a restricting member. Therefore, the number of parts can be further reduced, and the construction cost can be reduced.

The holding member includes a locking portion that is detachably locked to the reinforcing frame from the first side, and a holding portion that is integrally connected to the locking portion, and is between the holding portion and the reinforcing frame. It is preferable that the main muscle is sandwiched with play.
By locking the locking portion from the first side to the reinforcing frame, the holding member can be easily installed on the reinforcing frame. In addition, since the regulating member is hooked on the holding member from the first side, the load of the main reinforcement can be reliably transferred to the reinforcing frame via the regulating member and the holding member. The main bar can be securely supported. Furthermore, by loosely fitting the main bar between the holding portion of the holding member and the reinforcing frame, the main bar can be securely held so as to be displaceable in the axial direction and rotatable about the axis. Therefore, the main bars of the adjacent pile reinforcement rods can be reliably connected by the threaded joint. In addition, the holding member can be reused, whereby the construction cost can be further reduced.

It is preferable that the reinforcing frame is formed of a reinforcing bar in a ring shape, and a connecting portion between both ends of the reinforcing bar is provided at one place in the circumferential direction of the reinforcing frame.
Thereby, the material cost of the reinforcing frame can be reduced.

It is preferable that a frame reinforcing member for bridging a plurality of locations in the circumferential direction of the reinforcing frame is provided between the concrete placement pipe insertion space at the center of the reinforcing frame and the reinforcing frame.
Thereby, the reinforcing frame can be reinforced. In addition, the diameter of the reinforcing frame can be reduced. Furthermore, interference between the concrete placing pipe and the frame reinforcing member can be avoided, and the concrete for pile can be placed smoothly.

  According to the present invention, a screw rebar is adopted as the main reinforcing bar of the pile reinforcing bar, and the main reinforcing bars of the two pile reinforcing bars can be connected to each other by the screw joint.

FIG. 1 is a front view of a pile reinforcement bar according to the first embodiment of the present invention. FIG. 2 is a cross-sectional plan view of the above-described pile reinforcing bar along the line II-II in FIG. FIG. 3 is a front cross-sectional view of a portion of the above-mentioned pile reinforcement bar along the line III-III in FIG. FIG. 4 is a plan cross-sectional view of a part of the above-described pile reinforcing bar along the line IV-IV in FIG. 3. Fig.5 (a) is a top view of the reinforcement frame of the said pile reinforcement bar. FIG. 5B is a plan view showing a modification of the reinforcing frame. FIG. 6 is a perspective view of the holding member for the above-mentioned pile reinforcing bar rod. FIG. 7 is an enlarged front view showing a part of the circular part VII of FIG. Fig. 8 shows the construction procedure of the pile, and Fig. 8 (a) is a front cross-sectional view showing the state in which the pile rebar assembly is built in the pile hole of the ground in a state where the pile rebar rod is added to the assembly work in progress. is there. FIG. 4B is a front cross-sectional view showing a state where the assembled work body after the addition is lowered by the height of one pile reinforcing bar and inserted into the pile hole. FIG. 9 is a front sectional view of the pile. FIG. 10 is a plan view showing a modification of the reinforcing frame. FIG. 11 is a plan view showing another modification of the reinforcing frame. FIG. 12 is a plan view showing another modification of the reinforcing frame. FIG. 13 is a plan view showing another modification of the reinforcing frame. FIG. 14 is a plan view showing a modification of the holding member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 9, the pile 1 is constructed on the ground 2. A pile hole 2 a is formed in the ground 2. The pile 1 is embedded in the pile hole 2a. The pile 1 includes a pile rebar assembly 3 and concrete 4. The pile reinforcement assembly 3 is composed of a plurality of pile reinforcement rods 10, 10,. These pile reinforcement rods 10, 10... Are vertically arranged in a row.

  1 and 2 show each pile rebar rod 10 before being incorporated into the pile rebar assembly 3. Each pile reinforcing bar 10 includes a plurality of main bars 11, hoop bars 12, and a reinforcing frame 13. The overall shape of the pile reinforcement bar 10 is a substantially cylindrical shape.

  As shown in FIG.3 and FIG.4, the main reinforcement 11 is comprised with the screw reinforcement. A male screw portion 11 b is formed on the outer periphery of the main bar 11. Flat plane portions 11c and 11c are formed on a pair of side portions opposed to each other by 180 ° on the outer periphery of the main bar 11. The outer peripheral portion of the main bar 11 excluding these flat portions 11c and 11c is a male screw portion 11b. The axial length of each main reinforcement 11 and by extension, the height (length) of the pile reinforcement bar 10 is about 12 m, for example. As shown in FIG. 1, the axes of the main bars 11, 11,... Are parallel to each other and are directed vertically (up and down in FIG. 1). As shown in FIG. 2, the plurality of main bars 11, 11... Are arranged in a ring shape at intervals in the circumferential direction of the pile reinforcement bar 10. A hoop muscle 12 is wound around these main muscles 11, 11. The main muscles 11 and the hoop muscles 12 are tied together. The main muscle 11 can be displaced in the axial direction (vertical) with respect to the hoop muscle 12 and can rotate about its own axis.

  As shown in FIGS. 1 and 2, the pile reinforcing bar 10 is provided with a plurality of (preferably three or more) reinforcing frames 13, 13. Each reinforcing frame 13 has an annular shape (annular shape) along the circumferential direction of the pile reinforcing bar rod 10 (the arrangement direction of the main reinforcing bars 11, 11...). A plurality of reinforcing frames 13, 13... Are arranged apart from each other in the vertical direction (the axial direction of the pile reinforcing bar 10). A plurality of main bars 11, 11... Are held by these reinforcing frames 13. As a result, the whole shape of the pile reinforcement bar 10 is hold | maintained at the cylindrical shape.

As shown to Fig.5 (a), the reinforcement frame 13 is comprised by the reinforcing bar 13X. This reinforcing bar 13X is curved so as to form a closed annular shape along the longitudinal direction. Both ends of the reinforcing bar 13X are abutted and connected. A connecting portion 13c between both ends of the reinforcing bar 13X is provided at one place in the circumferential direction of the reinforcing frame 13. In the connecting portion 13c, both end portions of the reinforcing bar 13X are joined and connected integrally. For example, upset butt welding is applied as a joining means between both ends of the reinforcing bar 13X.
As shown in FIG. 5 (b), both ends of the reinforcing bar 13X may be overlapped by a required length and joined by flare welding or the like.

As shown in FIG. 2, the plurality of main bars 11, 11... In the pile reinforcing bar 10 are respectively directed to the reinforcing frame 13 from the outside in the radial direction of the reinforcing frame 13. Although detailed illustration is omitted, the reinforcing frames 13 other than the uppermost stage and the main reinforcing bars 11 of the reinforcing bars 13, 13... The uppermost reinforcing frame 13 and the main reinforcement 11 are connected by a holding member 30.
Hereinafter, unless otherwise specified, the reinforcing frame 13 refers to the uppermost one in the pile reinforcing bar 10.

  As shown in FIG. 2, a plurality of holding members 30, 30. These holding members 30, 30... Are arranged at intervals in the circumferential direction of the reinforcing frame 13. The holding members 30, 30... Correspond to the main bars 11, 11. Each holding member 30 connects and holds the corresponding main reinforcement 11 to the reinforcing frame 13.

  The material of the holding member 30 is a metal such as iron, steel, or cast iron. The holding member 30 is configured by bending a metal plate or the like, but is not limited thereto, and may be a cast product, for example. As shown in FIG. 6, the holding member 30 integrally includes a pair of locking portions 31, 31, a holding portion 32, and a communication portion 33. As shown in FIG. 4, the pair of locking portions 31, 31 are separated from each other in the circumferential direction of the reinforcing frame 13 and face each other. Each locking portion 31 has a substantially C-shaped flat plate shape. Specifically, as shown in FIG. 6, a locking hole 31 a is formed in the locking portion 31. The locking hole 31a reaches the lower end edge of the locking portion 31 and is opened, and a locking opening 31c is formed there. The opening width of the locking opening 31c and the diameter of the locking hole 31a are substantially the same as and slightly larger than the diameter of the reinforcing frame 13.

  As shown in FIGS. 4 and 6, the outer end portions (right end portions in FIG. 4) of the pair of locking portions 31, 31 are connected by a holding portion 32 and a connecting portion 33. The holding portion 32 is disposed on the radially outer side (right side in FIG. 4) of the reinforcing frame 13. The holding part 32 is U-shaped (semi-annular) in plan view. An insertion hole 32 a is formed inside the holding portion 32. The insertion hole 32a is opened to the reinforcing frame 13, and an insertion opening 32c is formed there.

As shown in FIG. 6, one end portion of the holding portion 32 (the end portion on the front side in FIG. 6) is connected to one locking portion 31 via the connecting portion 33. The connecting portion 33 has a flat plate shape along the outer surface of the reinforcing frame 13. The connecting portion 33 is formed with a screw hole 33c. A female screw is engraved on the inner peripheral surface of the screw hole 33c.
The other end portion of the holding portion 32 (the end portion on the back side in FIG. 6) is directly connected to the other locking portion 31.

  As shown in FIGS. 3 and 4, the main muscle 11 is inserted into the insertion hole 32a through the insertion opening 32c. The reinforcing frame 13 is inserted into the locking holes 31a and 31a from the locking openings 31c and 31c of the pair of locking portions 31 and 31. In other words, each locking portion 31 is locked to the reinforcing frame 13 from above (first side). The locking portion 31 and the holding member 30 are detachable from the reinforcing frame 13.

  As shown in FIG. 4, a part 13 a of the reinforcing frame 13 is spanned between the pair of locking portions 31 and 31. The bridging portion 13a covers the insertion opening 32c and substantially closes the insertion opening 32c. As a result, the main reinforcement 11 is sandwiched between the reinforcing frame 13 and the holding portion 32 and is prevented from coming out of the insertion opening 32c. Moreover, the main muscle 11 is inserted through the insertion hole 32a with play. That is, the main member 11 is held by the holding member 30 so as to be displaceable in the axial direction and rotatable about its own axis.

  As shown in FIG. 4, a set screw 34 is screwed into the screw hole 33 c of the holding member 30. The set screw 34 is abutted against the reinforcing frame 13. Accordingly, the holding member 30 is detachably fixed to the reinforcing frame 13.

  As shown in FIG. 3, in each pile reinforcing bar 10, the upper end portion (first end portion) of the main reinforcement 11 protrudes upward (first side) from the holding member 30. A threaded joint 20 is attached to the upper end of the main bar 11.

  The screw joint 20 has a cylindrical shape, and its axis is directed vertically. A female screw portion 22 is formed on the inner periphery of the screw joint 20. As shown by a two-dot chain line in FIG. 4, the outer diameter of the threaded joint 20 is larger than the insertion hole 32 a and further larger than the outer diameter of the holding portion 32. As shown in FIG. 7, a grout hole 24 is formed in the threaded joint 20. The grout hole 24 penetrates from the outer peripheral surface of the screw joint 20 to the inner peripheral surface.

  In each pile reinforcing bar 10, when the main bar 11 is displaced downward (second side) with respect to the reinforcing frame 13, the screw joint 20 is caught by the holding member 30. Thereby, the downward displacement of the main muscle 11 is regulated. That is, the threaded joint 20 is also used as a restricting means for restricting the downward displacement (second side) of the main bar 11.

  As shown in FIG.8 and FIG.9, in the pile reinforcement assembly 3, the corresponding main reinforcements 11 and 11 in the two pile reinforcement rods 10 and 10 adjacent up and down pass through the screw coupling 20 (regulation member). It is connected. Here, when distinguishing the above-mentioned two pile reinforcing bar rods 10 and 10 from each other, the upper (first side) pile reinforcing rod rods 10 are marked with “A” and the lower (second side) piles. Reinforcing bar 10 is marked with “B”. Moreover, when distinguishing two main reinforcements 11 and 11 which should be connected in pile reinforcement bar 10A, 10B from each other, the code of main reinforcement 11 of pile reinforcement bar 10A is denoted as "11A", and main reinforcement 11 of pile reinforcement bar 10B is described. The code is expressed as “11B”. Further, as shown in FIG. 8, pile reinforcement rods 10, 10... (Excluding pile reinforcement rods 10 A that have not yet been completed) are connected in a row in the pile reinforcement assembly 3 in the middle of construction. Called.

  As shown in FIG. 7, the threaded joint 20 straddles between the main bar 11A of the upper pile reinforcing bar rod 10A and the main bar 11B of the lower pile reinforcing bar rod 10B. The lower end portion of the main bar 11 </ b> A is screwed to the upper side portion of the screw joint 20. The upper end portion of the main bar 11 </ b> B is screwed to the lower side portion of the screw joint 20. A grout agent 5 is filled between the inner periphery of the threaded joint 20 and the main reinforcing bars 11A and 11B.

The construction method of the pile 1 is demonstrated centering on the construction method of the pile reinforcement assembly 3. FIG.
As shown in FIGS. 8 and 9, a pile hole 2 a is dug vertically in the ground 2. The pile hole 2a is filled with bentonite (not shown) to prevent the ground 2 from collapsing.
The pile rebar assembly 3 is built in the inside of this pile hole 2a in the following procedures.

  The pile reinforcement rods 10 are added to the assembly work piece 3x one by one above the pile hole 2a. Each time the joint is added, the assembly work piece 3x is inserted into the pile hole 2a by a certain depth.

  The hairpin 6 (hanging support member) is bridged over the upper end opening of the pile hole 2a. By this knurled line 6, the assembly work piece 3 x is supported in a suspended state. The hairpin 6 is made of, for example, a thick reinforcing bar. Preferably, the hairpin 6 is passed directly below the reinforcing frame 13 in the uppermost pile reinforcing bar 10 (10B) of the assembly work piece 3x. As a result, the load of the assembly work piece 3 x can be received by the reinforcing frame 13 and transmitted to the knurled muscle 6.

  In FIG. 8 (a), the barb 6 is inserted directly under the uppermost reinforcing frame 13 in the uppermost pile reinforcing bar 10B of the assembly work piece 3x, but in consideration of workability. Alternatively, the barb bars 6 may be inserted directly below the second-stage or third-stage reinforcing frame 13 from the top of the pile reinforcing bar 10B. By doing so, the height of the upper end part of the main reinforcement 11B of the pile reinforcement bar 10B can be positioned around the operator's waist. Therefore, it becomes easy to connect the main bars 11A and 11B described later.

  Subsequently, as shown in FIG. 8A, the pile reinforcing bar 10 </ b> A to be newly added is lifted by the crane 7. The suspension wire 7b of the crane 7 is preferably hooked on the reinforcing frame 13 of the pile reinforcing bar 10A.

  When the pile reinforcing bar 10A is lifted, each main reinforcing bar 11A of the pile reinforcing bar 10A tends to descend by its own weight. Then, the threaded joint 20 at the upper end of the main reinforcing bar 11 </ b> A is caught by the holding member 30. Thereby, the downward displacement (second side) of the main bar 11A can be restricted, and consequently the main bar 11A can be prevented from falling. The load of the main reinforcement 11 </ b> A can be received by the reinforcing frame 13 through the screw joint 20 and the holding member 30 in order, and further transmitted to the crane 7 through the reinforcing frame 13. As a result, the pile reinforcing bar 10A can be lifted stably.

  As shown in FIG. 8 (a), this pile reinforcing bar 10A is arranged immediately above the assembly work piece 3x, and the two main reinforcing bars 11, 11 to be connected to the pile reinforcing bar 10A, 10B are vertically aligned with each other. To place.

  Subsequently, as shown in FIG. 7, the threaded joint 20 at the upper end of the main bar 11B is turned up to be straddled between the main bars 11A and 11B. At this time, the male thread portion 11b of the two principal muscles 11A and 11B is arranged on a common spiral line by floating the principal muscle 11A upward (displacement in the axial direction) or rotating it around the axis. Adjust as follows. Thereby, the upper end part of the screw joint 20 can be reliably screwed to the lower end part of the main reinforcement 11A. As a result, as shown in FIG. 7, the main bars 11 </ b> A and 11 </ b> B can be reliably connected via the screw joint 20.

  Next, the grout agent 5 is filled from the grout hole 24 between the inner periphery of the threaded joint 20 and the main bars 11A and 11B. As a result, rattling between the threaded joint 20 and the main bars 11A and 11B can be eliminated. Therefore, the main muscles 11A and 11B are connected to each other so as to transmit the axial force.

All the main reinforcing bars 11A, 11B forming a straight line in the two pile reinforcing bar rods 10A, 10B are connected as described above. Since each main muscle 11A can be displaced upward and can be rotated, if a pair of main muscles 11A and 11B are connected to each other, the other main muscles 11A and 11B will not be disabled.
In this way, the pile reinforcing bar 10A can be added above the assembly work piece 3x.

  As shown in FIG. 8A, after the main bars 11A and 11B are joined together, the holding member 30 of the main bar 11B can be removed. At the time of removal, the holding member 30 can be easily detached from the reinforcing frame 13 by removing the set screw 34. The removed holding member 30 can be attached to another pile reinforcing bar 10. In short, the holding member 30 can be reused. Therefore, the required number of holding members 30 can be reduced. As a result, construction costs can be reduced.

  When removing the holding member 30 from the main reinforcement 11B, it is preferable to bind the reinforcing frame 13 of the pile reinforcement bar 10B and the main reinforcement 11B. Even if the holding member 30 is removed from the main bar 11B, the threaded joint 20 at the upper end of the main bar 11A is hooked on the holding member 30 of the pile reinforcing bar rod 10A, so that the main bars 11A, 11B,. it can.

  Subsequently, as shown in FIG. 8B, the knurled bar 6 is once pulled out and the assembly work body 3 x is suspended by the crane 7 by the height of one pile reinforcement bar 10. Then, the knurled bar 6 is suspended and supported by the knurled bar 6 by inserting the barb bar 6 into the uppermost pile bar bar 10 (the newly added pile bar bar 10A) of the assembled bar 3x.

By repeating the above operation, as shown in FIG. 9, the lowermost pile reinforcement rod 10 eventually reaches the bottom of the pile hole 2a. Thereby, the pile rebar assembly 3 can be constructed inside the pile hole 2a.
After that, as shown in FIG. 2, the concrete placement pipe 8 such as a tremy pipe is inserted into the pile rebar assembly 3 and the concrete 4 is placed.
In this way, the pile 1 can be constructed.

According to the pile reinforcement assembly 3, it is not necessary to overlap the main reinforcements 11, 11 of the pile reinforcement rods 10A, 10B. Therefore, the length of the main muscle 11 can be used effectively.
By constructing the reinforcing frame 13 with the reinforcing bars 13X, it is possible to reduce the construction cost compared to constructing the angle member with an L-shaped cross section. In addition, in the reinforcing frame made of angle material, there is a possibility that an air pocket may be formed below the horizontal material of the angle material when placing concrete, but in the reinforcing frame 13 made of reinforcing bar 13X, The formation of air pockets can be prevented or suppressed.
By restricting the downward displacement of the main bar 11 with the screw joint 20, the screw joint 20 can also be used as a restricting member. Further, the holding member 30 can also be used as a receiving member for the regulating member (screw joint 20). Therefore, the number of parts can be reduced and the construction cost can be reduced.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for the same configurations as those already described, and the description thereof is omitted.
FIG. 10 shows a modification of the reinforcing frame 13.
The reinforcing frame 13 is provided with a frame reinforcing member 14. The frame reinforcing member 14 is formed by bending a reinforcing bar, and has a regular quadrangular annular frame shape. Four corners of the frame reinforcing member 14 are joined to four locations (plural locations) of the reinforcing frame 13 by welding. Therefore, the frame reinforcing member 14 includes four (plural) beam portions 14a, 14a. These beam portions 14a, 14a,. Each beam portion 14 a bridges two places in the circumferential direction of the reinforcing frame 13.

  A concrete placement pipe insertion space 2 c is set at the center of the pile reinforcing bar 10. The concrete placement pipe 8 is inserted into the concrete placement pipe insertion space 2c. Each beam portion 14a of the frame reinforcing member 14 is disposed between the reinforcing frame 13 and the concrete placement pipe insertion space 2c so as not to pass through the concrete placement pipe insertion space 2c. Accordingly, the concrete placing pipe 8 can be prevented from interfering with the frame reinforcing member 14 when the concrete 4 is placed.

  According to the aspect of FIG. 10, the reinforcing frame 13 can be reinforced by the frame reinforcing member 14. Therefore, the strength of the reinforcing frame 13 can be ensured. The reinforcement frame 13 can be reduced in diameter accordingly.

FIG. 11 shows a further modification of the reinforcing frame 13. In the reinforcing frame 13 of FIG. 11, two frame reinforcing members 14 are provided. These frame reinforcing members 14, 14 are offset from each other by 45 degrees. One frame reinforcing member 14 is disposed on the upper side of the reinforcing frame 13, and four corners are welded to the upper surface portion of the reinforcing frame 13. The other frame reinforcing member 14 is disposed below the reinforcing frame 13, and four corners are welded to the lower surface portion of the reinforcing frame 13.
According to the aspect of FIG. 11, the reinforcing frame 13 can be reinforced by the two frame reinforcing members 14 and 14. Therefore, the strength of the reinforcing frame 13 can be further secured, and the reinforcing frame 13 can be further reduced in diameter.

  In the modification of FIG. 12, the frame reinforcing member 14B is formed in an equilateral triangular annular frame shape. Therefore, the frame reinforcing member 14B has three beam portions 14a, 14a, and 14a. Three corners of the frame reinforcing member 14B are joined to three places (a plurality of places) of the reinforcing frame 13 by welding.

  In the modification of FIG. 13, the reinforcing frame 13 is reinforced by two triangular frame reinforcing members 14B and 14B. The two frame reinforcing members 14B and 14B are offset from each other by 60 degrees. One frame reinforcing member 14 </ b> B is disposed on the upper side of the reinforcing frame 13, and three corners are welded to the upper surface portion of the reinforcing frame 13. The other frame reinforcing member 14 </ b> B is disposed below the reinforcing frame 13, and three corners are welded to the lower surface portion of the reinforcing frame 13.

FIG. 14 shows a modification of the holding member 30B. An insertion hole 33b is formed in the connecting portion 33 of the holding member 30B in place of the screw hole 33c (FIG. 6). An internal thread is not provided on the inner peripheral surface of the insertion hole 33b. A nut 35 is fixed to the back surface (left side surface in FIG. 14) of the connecting portion 33. A set screw 34 is screwed into the nut 35 through the insertion hole 33b.
The nut 35 may be provided on the front side surface (the right side surface in FIG. 14) of the connecting portion 33.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit thereof.
For example, the regulating member may be provided separately from the screw joint 20. A nut may be provided as a restricting member between the threaded joint 20 at the upper end of the main bar 11 and the holding member 30, and the downward displacement of the main bar 11 may be restricted by the nut being caught by the holding member 30.
Nuts may be provided at both ends of the threaded joint 20, and the nuts may be fastened to the threaded joint 20 when the main bars 11 </ b> A and 11 </ b> B are connected to each other. One of the nuts may be the restriction member.
The restricting member may be a protrusion protruding from the outer peripheral portion of the main bar 11, and the protrusion may be integrated with the main bar 11. The convex portion is preferably annular, and more preferably has an outer diameter larger than the inner diameter of the holding portion 32.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a pile reinforcing bar rod constituting a pile reinforcing bar assembly in a building / civil engineering structure.

DESCRIPTION OF SYMBOLS 1 Pile 3 Pile reinforcement assembly 10 Pile reinforcement rod 11 Main reinforcement 13 Reinforcement frame 13c Connection part 13X Reinforcement 20 Threaded joint (regulation member)
30, 30B Holding member 31 Locking portion 32 Holding portion 14, 14B Frame reinforcing member

Claims (5)

A plurality of main bars made of screw rebars, oriented in parallel with each other in an axis, and arranged annularly at intervals from each other;
A reinforcing frame formed in an annular shape along the alignment direction of the main bars,
A plurality of members arranged at intervals in the alignment direction, i.e., the circumferential direction of the reinforcing frame, and holding members corresponding to the reinforcing frame so as to be displaceable in the axial direction and rotatable about the axis;
A restricting member that is provided at an end of the main reinforcing bar that protrudes toward the first side in the axial direction from the reinforcing frame, and that restricts displacement of the main reinforcing bar to the second side in the axial direction by being caught by the holding member. A pile rebar fence characterized by comprising and.   The pile reinforcing bar rod according to claim 1, wherein the regulating member is a cylindrical threaded joint that can be screwed into the threaded reinforcing bar.   The holding member includes a locking portion that is detachably locked to the reinforcing frame from the first side, and a holding portion that is integrally connected to the locking portion, and is between the holding portion and the reinforcing frame. The pile reinforcing bar rod according to claim 1 or 2, wherein the main bars are sandwiched between the main bars.   The reinforcing frame is formed by forming a reinforcing bar in an annular shape, and a connecting portion between both ends of the reinforcing bar is provided at one place in the circumferential direction of the reinforcing frame. The pile reinforcement bar | burr of any one of these.   A frame reinforcing member that bridges a plurality of locations in the circumferential direction of the reinforcing frame is provided between the concrete placement pipe insertion space at the center of the reinforcing frame and the reinforcing frame. The pile reinforcement bar | burr of any one of Claims 1-4.

Images