Pile head joint components

Abstract

To provide a member for a pile head joint, which is difficult to cause variations in reinforcing bars and is easy to temporarily install.SOLUTION: A member for a pile head joint 1 comprises a vertical connecting rod portion 2 installed along the length of a pile on an outer peripheral wall of a steel pipe pile when joining the steel pipe pile and a reinforcing bar, a hanging surface portion 3 that projects inward of the pile diameter of the steel pipe pile and connects to an upper end portion of the vertical connecting rod portion 2, and a reinforcing bar placement surface portion 4 that protrudes toward the outside of the pile diameter of the steel pipe pile and connects to a lower end of the vertical connecting rod portion 2. A predetermined guideline mark 44 is carved into the reinforcing bar placement surface portion 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pile head joint member used to join a steel pipe pile and a reinforcing bar. [Background technology]

[0002] There are a number of connecting members that are connected to the upper outer peripheral surface of the pile head at intervals, and are used for the purpose of improving the workability of reinforcing bars at the pile head (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-34458 A Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned connecting member has a lower plate portion to which the reinforcing steel bars can be fixed and an upper plate portion having a passage formed therein for inserting the reinforcing steel bars, and is an excellent connecting member that can improve the ease of installation of reinforcement bars above the pile head.

[0005] However, when fixing the above-mentioned connecting members to the steel pipe pile, if the fixing position is determined by visual inspection alone, there may be variation in the heights of the multiple connecting members, and if the fixing position is determined by distance measurement (such as the distance from the pile head to the joint), this may result in additional work.

[0006] Therefore, the objective of the present invention was to provide a joint member for a pile head joint that is less likely to have variation in the fixing position when fixing the joint member (corresponding to the "pile head joint member" in this application) to a steel pipe pile and that can reduce the effort required for fixing. [Means for solving the problem]

[0007] The present invention relates to a pile head joint member for joining a steel pipe pile and a reinforcing bar, and is composed of a vertical connecting rod portion arranged along the pile length direction of the outer wall surface of the steel pipe pile when joining the steel pipe pile and the reinforcing bar, a hanging surface portion protruding inward of the pile diameter of the steel pipe pile and connecting with one side end of the vertical connecting rod portion, and a reinforcing bar placement surface portion protruding outward of the pile diameter of the steel pipe pile and connecting with the other side end of the vertical connecting rod portion. The shape of the reinforcing bar placement surface portion is a generally inverted triangular shape with a rounded tip, and a guide mark indicating a guide for the position of the tip of the reinforcing bar is provided on the surface side of the reinforcing bar placement surface portion, and the guide mark is drawn with two parallel horizontal lines parallel to the edge of the base side of the reinforcing bar placement surface portion. A component for a pile head joint is provided.

[0008] In addition, the present invention provides a member for pile head joints which further includes, as the guide marking, two first parallel diagonal lines parallel to one edge end of the reinforcing bar mounting surface portion extending from the base side to the tip side, and two second parallel diagonal lines parallel to the other edge end of the reinforcing bar mounting surface portion extending from the base side to the tip side.

[0009] The present invention also provides a pile head joint member in which the width of the hanging surface portion is the same as the width of the reinforcing bar mounting surface portion. Effect of the Invention

[0010] The pile head joint component of the present invention is a pile head joint component for joining a steel pipe pile and a reinforcing bar, and when joining the steel pipe pile and the reinforcing bar, is composed of a vertical connecting rod portion that is arranged along the pile length direction of the outer wall surface of the steel pipe pile, a hanging surface portion that protrudes inwardly of the pile diameter of the steel pipe pile and is connected to one side end of the vertical connecting rod portion, and a reinforcing bar placement surface portion that protrudes outwardly of the pile diameter of the steel pipe pile and is connected to the other side end of the vertical connecting rod portion.Therefore, the hanging surface portion makes it easy to temporarily install (temporarily fix) the steel pipe pile to the pile head, and also eliminates variation in the height direction (pile length direction) when arranging the reinforcing bar.

[0011] Also, In the pile head joint member of the present invention, the shape of the reinforcing bar placement surface portion is a rounded inverted triangular shape, A guide mark showing the guide position for arranging the tip of the reinforcing bar is provided on the surface side of the reinforcing bar placement surface portion, and the guide mark is drawn with two parallel horizontal lines parallel to the edge of the base side of the reinforcing bar placement surface portion. Therefore, when placing reinforcing bars, Reinforcement points Suppressing variation (Reduce)In addition, since it is relatively easy to carve or draw two parallel horizontal lines, the processing cost can be reduced.

[0012] The pile head joint component of the present invention further includes, as the guide markings, two first parallel oblique lines parallel to one edge of the reinforcing bar placing surface portion from the base side to the tip side, and two second parallel oblique lines parallel to the other edge of the reinforcing bar placing surface portion from the base side to the tip side, making it possible to suppress variation in the circumferential direction (width direction) of the steel pipe pile when arranging the reinforcing bars. In addition, since it is relatively easy to carve or draw the first and second parallel oblique lines, processing costs can be reduced.

[0013] The pile head joint component of the present invention has the same width of the hanging surface portion and the reinforcing bar placement surface portion, making it easy to visually inspect the welding work after the reinforcing bars are placed. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a member for a pile head joint. [Diagram 2] FIG. 2 is a front view of the pile head joint member. [Diagram 3] FIG. 3 is a left side view of the pile head joint member. [Figure 4] FIG. 4 is a plan view of a member for a pile head joint. [Diagram 5] FIG. 5 is a diagram showing the pile head joint member hooked onto the head of a steel pipe pile for temporary installation (temporary fixing). [Figure 6] FIG. 6 is a diagram showing a state in which a plurality of pile head joint members are temporarily installed (temporarily fixed) on the outer wall surface of a steel pipe pile. [Figure 7] FIG. 7 is a diagram showing the state in which reinforcing bars are arranged on the reinforcing bar placement surface, as viewed from the left side. [Figure 8] FIG. 8 is a view showing the state in which the reinforcing bars are arranged on the reinforcing bar placement surface portion, as viewed from the right side. [Figure 9]FIG. 9 is a diagram showing the state of use after the reinforcing bars have been arranged on the reinforcing bar placement surface and fixed by welding. [Figure 10] FIG. 10 is a diagram showing a state in which a plurality of reinforcing bars are arranged on the outer wall surface of a steel pipe pile. [Figure 11] FIG. 11 shows the manufacturing process of cutting a single steel plate and forming a member piece for a pile head joint. [Figure 12] FIG. 12 is a diagram showing the state in which the lower end of the pile head joint member piece is bent to form a reinforcing bar mounting surface. [Figure 13] FIG. 13 is a diagram showing the state in which the upper end of the pile head joint member is further bent to form a hanging surface portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] It is implemented as a pile head joint component that allows easy temporary installation (temporary fixing) to the head of a steel pipe pile and eliminates variation in the fixing position when arranging reinforcing bars. EXAMPLES

[0016] First, the overall structure of the pile head joint member will be described with reference to Figs.

[0017] The pile head joint member (1) is composed of a vertical connecting rod portion (2) that is arranged along the pile length direction of the outer wall surface of the steel pipe pile when joining the steel pipe pile and the reinforcing bar, a hanging surface portion (3) having a rectangular downward protruding surface formed by bending the upper end of the vertical connecting rod portion at approximately a right angle in a specified direction, and a reinforcing bar mounting surface portion (4) having an upward protruding surface with a roughly rounded triangular shape formed by bending the lower end of the vertical connecting rod portion at approximately a right angle in a specified direction (Figures 1 to 3).

[0018] The vertical connecting rod portion (2) is connected at a connecting position between the center of the hanging surface portion (3) and the center of the reinforcing bar mounting surface portion (4) (Figure 2).

[0019] The vertical connecting rod portion (2) has a vertically long rectangular shape when viewed from the front and a plate shape when viewed from the side having a thickness (T1) thinner than the width (W1) of the vertically long rectangular shape when viewed from the front (FIGS. 2 and 3).

[0020] The hanging surface portion (3) has a downward protruding surface by bending the upper end of the vertical connecting rod portion (2) at a substantially right angle in a predetermined direction, which means that the hanging surface portion (3) has a protruding surface that protrudes inward of the pile diameter of the steel pipe pile when the steel pipe pile and the reinforcing bar are joined. Temporary installation (temporary fixation) is possible by hooking the protruding surface onto the pile head edge.

[0021] The width (W2) of the fastening surface portion (3) is the same as the width (W3) of the reinforcing bar placement surface portion (4) (Figure 2).

[0022] By making the width (W2) of the hanging surface portion (3) and the width (W3) of the reinforcing bar placement surface portion (4) the same length, visual inspection of the condition after the reinforcing bar is arranged and welded (to ensure that the welding is not performed in an uneven area, for example) becomes easy (because an imaginary line connecting the end of the hanging surface portion and the end of the reinforcing bar placement surface portion is perpendicular).

[0023] Regarding the shape of the fastening surface portion (3), any shape is acceptable as long as it has a surface portion that can be hooked onto the head edge of the steel pipe pile for temporary installation (temporary fixation). However, taking into consideration the ease of processing and processing costs, a rectangular shape as shown in Figure 4 is preferable (Figure 4).

[0024] The rounded triangular shape of the reinforcing bar mounting surface portion (4) refers to an inverted triangular shape in which the width gradually narrows from the widest base side (41) to the tip side (42), and the tip side is rounded (Fig. 1, Fig. 3, and Fig. 4).

[0025] It is preferable to provide a guide mark (44) on the front surface (43) of the reinforcing bar mounting surface portion (4) to indicate the position where the tip of the reinforcing bar is to be arranged (FIGS. 2 and 4).

[0026] The method of providing (displaying) the guide markings (44) on the surface side (43) of the reinforcing bar mounting surface portion (4) is preferably by engraving (FIG. 4) so ​​that they will not easily disappear due to contact with people or due to rain or snow dripping.

[0027] As a specific embodiment of the guide mark (44), it is preferable to carve two parallel horizontal lines (441) parallel to the base edge of the reinforcing bar mounting surface portion (4) having a roughly rounded triangular shape (Figure 4).

[0028] By adding the parallel horizontal lines (441) as the guide markings (44), the positional relationship between both ends of the parallel horizontal lines and the lattice pattern of the reinforcing bars can be easily visually confirmed, and as a result, variation in the arrangement of the reinforcing bars can be eliminated.

[0029] More preferably, two first parallel diagonal lines (442) are drawn parallel to one edge (the left edge shown in Figure 4) extending from the base side to the tip side (42) of the reinforcing bar mounting surface portion (4) between the edge of the base side (41) of the reinforcing bar mounting surface portion (4) and the parallel horizontal lines (441), and two second parallel diagonal lines (443) are drawn parallel to the other edge (the right edge shown in Figure 4) extending from the base side to the tip side of the reinforcing bar mounting surface portion (Figure 4) (Figure 4).

[0030] By adding not only the parallel horizontal lines (441) but also the first parallel diagonal lines (442) and the second parallel diagonal lines (443) as guide marks (44), it is possible to suppress variation in the circumferential direction of the pile (width direction of the pile) when arranging the reinforcing bars.

[0031] Next, the process of arranging reinforcing bars on the outer wall surface of the steel pipe pile will be described with reference to Figs.

[0032] The temporary installation (temporary fixation) of the pile head joint member (1) is completed by hooking the hanging surface portion (3) onto the head of the steel pipe pile (5) (hereinafter referred to as the “pile head portion (51)”) (Figure 5).

[0033] When the above-mentioned temporary installation is completed, the vertical connecting rod portion (2) is disposed so as to extend along the length of the outer wall surface of the steel pipe pile (5) (FIG. 5).

[0034] In addition, the hanging surface portion (3) protrudes inwardly from the outer wall surface of the steel pipe pile in the direction of the pile diameter, and the reinforcing bar placement surface portion (4) protrudes outwardly from the outer wall surface of the steel pipe pile in the direction of the pile diameter (Figure 5).

[0035] Similarly, a number of pile head joint members (1) are temporarily installed (temporarily fixed) to the steel pipe pile (5) at regular intervals (FIG. 6).

[0036] Thereafter, the reinforcing steel bar (6) is pressed against the vertical connecting rod portion (2) while its tip is placed on the reinforcing steel bar placement surface portion (4) (FIG. 7).

[0037] At this time, by visually checking that the positional relationship between the lattice pattern of the reinforcing bar (6) and the parallel horizontal lines (441) (for example, the vertical bar pattern of the reinforcing bar and the pitch of the parallel horizontal lines are the same as shown in Figures 7 and 8), variations in the reinforcement can be eliminated (Figures 7 and 8).

[0038] Thereafter, the arc-shaped gap between the vertical connecting rod portion (2) and the reinforcing steel bar is welded (the portion indicated by diagonal lines in FIG. 9) to complete the installation (FIG. 9).

[0039] Similarly, the installation of multiple reinforcing bars (6) is also completed (Figure 10).

[0040] Next, a manufacturing method for a pile head joint member will be described with reference to Figs.

[0041] Draw the developed shape of the pile head joint component on a steel plate and cut it out (Figure 11).

[0042] One end side (the lower end side shown in Figure 11) of the pile head joint component piece cut into the expanded shape of the pile head joint component is bent to form the reinforcing bar mounting surface portion (4) (Figure 11).

[0043] The angle at which the bending process is performed is set to a right angle (90 degrees) taking into consideration that this is the point where the tip of the reinforcing steel bar will be placed (placed), but some angle deviation due to manufacturing errors is acceptable.

[0044] Furthermore, by setting the bending direction to be the outer direction of the pile diameter of the steel pipe pile, it is possible to form a surface portion suitable for the arrangement of reinforcing bars.

[0045] Furthermore, the other end side (the upper end side shown in FIG. 12) of the pile head joint member piece is bent to form a hanging surface portion (3) (FIG. 12).

[0046] The angle at which the bending process is performed is set to a right angle (90 degrees) considering that this will be the point where it will be hooked onto the head of the pile, but some deviation in angle due to manufacturing error is acceptable.

[0047] Furthermore, by bending the pile in the inward direction of the steel pipe pile diameter, a surface portion suitable for hooking onto the pile head for temporary installation (temporary fixation) can be formed (Figure 12).

[0048] Regarding the size (dimensions) of the developed shape of the pile head joint component drawn on the steel plate, a large number of developed shapes are permitted in order to accommodate various sizes of reinforcing bars.

[0049] In this embodiment, the manufacturing method is described in which the developed shape of the pile head joint component is drawn on a single steel plate, cut, and then the pile head joint component piece is bent twice. However, it is also possible to manufacture the pile head joint component by manufacturing (cutting) the vertical connecting rod portion (2), the hanging surface portion (3), and the reinforcing bar mounting surface portion (4) separately and then integrating them by general joining means such as welding. [Industrial Applicability]

[0050] INDUSTRIAL APPLICABILITY The pile head joint component of the present application is an excellent joint component that is less likely to cause uneven reinforcing bar arrangement and is easy to install temporarily, and has industrial applicability. [Explanation of symbols]

[0051] 1 Pile head joint members 2 Vertical connecting rod 3 Hanging surface 4 Reinforcing bar placement surface 41 Root side 42 Tip side 43 Surface side (side where reinforcing steel bars are placed) 44 Estimated Display 441 Parallel Horizontal Lines 442 1st parallel diagonal line 443 2nd parallel diagonal line 5 Steel pipe pile 51 Pile head 6 Reinforcing steel bars T1 Thickness of vertical connecting rod W1 Width of vertical connecting rod W2 Width of the fastening surface W3 Width of the base part of the reinforcing bar placement surface

Claims

1. A pile head joint member for joining a steel pipe pile and a reinforcing bar, A vertical connecting rod portion (2) that is arranged along the pile length direction of the outer wall surface of the steel pipe pile when connecting the steel pipe pile and the reinforcing bar; A hanging surface portion (3) that protrudes toward the inside of the pile diameter of the steel pipe pile and is connected to one end of the vertical connecting rod portion; A reinforcing bar placement surface portion (4) that protrudes toward the outside of the pile diameter of the steel pipe pile and is connected to the other end of the vertical connecting rod portion; It consists of The shape of the reinforcing bar placement surface portion is a generally inverted triangular shape with a rounded tip, and a guide mark (44) indicating a guide for arranging the tip of the reinforcing bar is provided on the surface side of the reinforcing bar placement surface portion, A pile head joint component in which the guide marking is drawn with two parallel horizontal lines (441) parallel to the base edge of the reinforcing bar mounting surface portion.

2. The pile head joint component of claim 1 further includes, as the guide marking (44), two first parallel diagonal lines (442) parallel to one edge of the reinforcing bar mounting surface portion extending from the base side to the tip side, and two second parallel diagonal lines (443) parallel to the other edge of the reinforcing bar mounting surface portion extending from the base side to the tip side.

3. 3. A pile head joint member according to claim 1 or 2, wherein the width of the fastening surface portion (3) is the same as the width of the reinforcing bar placement surface portion (4).

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