JP7112881B2 - Jig for pile head joint - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile head joining jig used when joining a joining member used for arranging reinforcing bars to a pile head of a foundation pile to a foundation pile.

Conventionally, in order to integrate foundation piles and foundation concrete, a plurality of reinforcing reinforcing bars are joined in advance to the pile heads of the foundation piles. In this state, the foundation pile and the foundation concrete were integrated by placing the foundation concrete around the reinforcing reinforcing bar and the pile head.

In this way, when joining a reinforcing bar to the pile head, it is proposed to use a predetermined joining member in order to obtain high reinforcing strength without using a special reinforcing bar (Patent Document 1 ).

JP 2015-34458

FIG. 6 is a diagram showing the pile head joint structure 100 shown in Patent Document 1. As shown in FIG. The foundation pile 101 is driven deep into the ground of the foundation ground 103 . The foundation pile 101 is, for example, a steel pipe pile or SC pile (high-strength concrete pile with shell steel pipe), and a pile head 105 protrudes above the foundation ground 103 .

Joining members 107 are joined to the outer periphery of the pile head 105 at predetermined intervals in the circumferential direction. The joint member 107 is made of steel and is welded to the outer peripheral portion of the foundation pile 101 so as to protrude radially outward from the outer peripheral surface of the pile head portion 105 . In order to avoid interference with the reinforcing bar 109, the joint member 107 is provided with a U-shaped notch portion (not shown) at its upper portion, and a female screw portion (not shown) is formed at its lower portion.

A male threaded portion is formed below the reinforcing bar 109 of the joint member 107 , and the lower portion of the reinforcing bar 109 is screwed into the female threaded portion of the joint member 107 . The reinforcing bar 109 is joined to the joining member 107 below the joining member 107, and arranged inside the U-shaped cutout portion above the joining member 107. As shown in FIG.

By doing so, a plurality of reinforcing reinforcing bars 109 can be arranged above the foundation pile 101 in the same direction as the axial direction of the foundation pile 101 . In this state, foundation concrete is placed so as to completely fill the reinforcing reinforcing bars 109 and the pile heads 105 . The female screw portion at the bottom of the joint member 107 can receive force against the upward tension of the reinforcing reinforcing bar 109 , and the concrete filling the inside of the joint member 107 is cut at the top of the joint member 107 . It can receive force by coming into contact with the vicinity of the notch.

In addition, since a longer welding length can be secured compared to the case where the reinforcing reinforcing bar 109 is directly joined to the foundation pile 101, the force received by the reinforcing reinforcing bar 109 can be efficiently transmitted to the foundation pile 101. . Therefore, high reinforcing strength can be obtained.

In addition, since the reinforcing bars 109 are not welded, there is no need to use a special material with good weldability, and construction can be performed at low cost.

However, since the joint member 107 is a relatively heavy member, there is a problem that it is difficult to perform welding while the joint member 107 is arranged in a predetermined position and in a predetermined direction.

The present invention has been made in view of such problems, and a pile head joint that can easily join a joint member used for arranging reinforcing bars to the pile head to the pile head. The purpose is to provide a jig for

In order to achieve the above object, the present invention provides a pile head joint jig for joining a joint member to a pile head, comprising: a hanging portion hooked to the upper end of the pile head; and a connecting portion connecting the supporting portion and the hanging portion .

A positioning portion may be provided in the support portion or the connection portion, protrudes in substantially the same direction as the hook portion, and contacts the outer surface of the foundation pile.

ADVANTAGE OF THE INVENTION According to this invention, a joint member can be easily arrange|positioned in the predetermined position of a pile head by installing the jig|tool for pile head joints in a pile head.

In particular, as shown in FIG. 5, by providing a screw 21 in the upper part so that the pile head can be contacted, the height and inclination of the jig for joining the pile head can be easily adjusted.

ADVANTAGE OF THE INVENTION According to this invention, the jig|tool for pile head joint parts which can join easily the joint member used in order to arrange|position a reinforcement reinforcing bar to a pile head part to a pile head part can be provided.

The perspective view which shows the jig|tool 1 for pile head joint parts. The perspective view which shows the use condition of the jig|tool 1 for pile head joint parts. The side view which shows the use condition of the jig|tool 1 for pile head joint parts. The side view which shows the use condition of the jig|tool 1a for pile head joint parts. The side view which shows the use condition of the jig|tool 1b for pile head joint parts. The side view which shows the conventional pile head joint structure 100. FIG.

A jig for joining a pile head according to an embodiment of the present invention will be described below. FIG. 1 is a perspective view showing a jig 1 for joining pile heads. The pile head joint jig 1 is mainly composed of a hook portion 3, a support portion 5, a positioning portion 7, a connecting portion 9, and the like.

The pile head joint jig 1 is made of, for example, a steel material such as a steel bar or a steel plate. The hanging part 3 is a part to be hung on the upper end of the pile head. The support portion 5 is a portion that supports the joining member. The hanging portion 3 and the support portion 5 are connected via the connecting portion 9 .

A positioning portion 7 projecting in substantially the same direction as the hook portion 3 is provided below the connecting portion 9 . In the illustrated example, the hooking portion 3 , the connecting portion 9 and the positioning portion 7 are integrally formed, and the hooking portion 3 and the positioning portion 7 are bent at substantially right angles with respect to the connecting portion 9 . A pair of the hooking portion 3 , the connecting portion 9 and the positioning portion 7 are arranged at a predetermined interval and connected by the supporting portion 5 .

Note that the positioning portion 7 may be provided on the support portion 5 instead of on the connecting portion 9 . Moreover, the support portion 5 may be joined at the connecting portion 9 or may be joined at the positioning portion 7 . Also, each part may be formed separately and joined to each other.

FIG. 2 is a perspective view showing how the jig 1 for joining pile heads is used, and FIG. 3 is a side view. The joining member 15 is made of steel, and the one described in Patent Document 1 can be used. For example, the joint member 15 has an upper plate portion 16a and a lower plate portion 16b that are arranged to face each other with a gap in a direction parallel to the axial direction of the pile head portion 11 . The upper plate portion 16a is formed with a passage through which a reinforcing reinforcing bar is inserted in a direction parallel to the axial direction of the pile head portion 11 . That is, the joining member 107 is provided with a U-shaped cutout portion in the upper plate portion 16a in order to avoid interference with the reinforcing reinforcing bar. A female screw portion 17 is formed in the lower plate portion 16 b of the joint member 15 . In addition, the joint member 15 includes a connection plate portion 16 c having a length parallel to the axial direction of the pile head portion 11 and joined to the pile head portion 11 . The connection plate portion 16c is formed between an end portion of the upper plate portion 16a on the pile head 11 side and an end portion of the lower plate portion 16b on the pile head 11 side.

The pile head joint jig 1 is hung on the top of the pile head 11 of the foundation pile 13 . The foundation piles 13 are, for example, steel pipe piles or SC piles (high-strength concrete piles with shell steel pipes). At this time, the tip of the positioning part 7 is arranged so as to be in contact with the outer peripheral surface of the foundation pile 13 .

The joint member 15 is arranged on the support portion 5 . At this time, the length of the connecting portion 9 is set so that the joining member 15 does not protrude above the pile head portion 11 . Further, when the joint member 15 is installed on the support portion 5, the joint member 15 can be supported in a state of being brought into close contact with the side of the foundation pile 13 without falling outward.

Further, a concave shape may be formed on the lower surface of the joint member 15 so as to come into contact with the support portion 5 . In this case, by matching the distance between the support portion 5 and the positioning portion 7 with the distance between the concave shape and the back surface of the joint member 15, when the joint member 15 is arranged on the support portion 5, the back surface of the joint member 15 can be adjusted. It can be brought into contact with the outer peripheral surface of the foundation pile 13 .

In addition, by making the length of the support portion 5 longer than the width of the joint member 15, interference between the joint member 15 and the pile head joint jig 1 can be avoided, and the joint member 15 can be easily attached. It can be installed on the support 5 .

In this state, the side portion of the joining member 15 and the outer peripheral surface of the foundation pile 13 are welded together at the welding portion 19 (see FIG. 3). The welded portion 19 is formed over substantially the entire length of the joint member 15 . In addition, welding can be easily performed by forming a groove shape that forms a gap between the joint member 15 and the foundation pile 13 at the side end portion on the back side of the joint member 15 .

When the joining member 15 and the foundation pile 13 are joined together, the pile head joining jig 1 is removed, and the reinforcing reinforcing bar is joined to the joining member 15 . For example, a male thread provided at the bottom of the reinforcing bar is screwed into the female thread 17 . In addition, you may join a reinforcing bar in the state which attached the jig|tool 1 for pile head joint parts. Even in this case, it is possible to remove the joining member 15 from the pile head 11 in a state where the reinforcing reinforcing bar is screwed to the joining member 15 . By repeating the above operations at predetermined intervals in the circumferential direction of the pile head 11, a joint structure at the pile head similar to that shown in FIG. 6 can be obtained.

As described above, according to the present embodiment, since the joint member 15 can be easily installed on the pile head 11 and held in that state, the joint member 15 can be welded to the outer peripheral surface of the foundation pile 13 work is easy. Moreover, since the positioning is easy, it is possible to suppress the occurrence of misalignment during welding work.

Moreover, since the positioning part 7 is formed, the pile head joining jig 1 can be positioned at a predetermined distance from the outer peripheral surface of the foundation pile 13 . Therefore, the joint member 15 can be reliably arranged in contact with the outer peripheral surface of the foundation pile 13 .

Next, a second embodiment will be described. FIG. 4 is a side view showing how the jig 1a for joining pile heads is used. The pile head joint jig 1a has substantially the same configuration as the pile head joint jig 1, but differs in that the support portion 5 is plate-shaped. As described above, each part of the pile head joint jig 1 may be in any form such as a steel bar or a steel plate, but the support part 5 is plate-shaped and provided substantially horizontally with respect to the connection part 9. Therefore, the joint member 15 can be installed on the support portion 5 more easily, and the joint member 15 can be supported more stably. It is sufficient that the supporting portion 5 is fixed to the connecting portion 9 in some way.

An introduction portion 23 is provided at the tip of the support portion 5 . The introduction part 23 plays a role of a guide (interceptor) when the joining member 15 is installed. Specifically, the joint member 15 can be arranged at a predetermined position of the pile head portion 11 by temporarily placing the joint member 15 in the introduction portion 23 and then sliding the joint member 15 .

Even in this case, the portion supported by the support portion 5 is outside the center of gravity of the joint member 15, so that the joint member 15 does not fall outward.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. In addition, by making the support portion 5 plate-shaped, for example, the support portion 5 and the joint member 15 can be supported by being in surface contact with each other over a wider range.

Next, a third embodiment will be described. FIG. 5 is a side view showing how the jig 1b for joining pile heads is used. The pile head joint jig 1 b has substantially the same configuration as the pile head joint jig 1 , but differs in that a screw 21 is provided in the hook portion 3 .

The screw 21 is arranged substantially perpendicular to the hooking portion 3 and is screwed with the hooking portion 3 . For example, the screw 21 can be screwed into the hooking portion 3 by making the hooking portion 3 plate-like and forming a female threaded portion on the hooking portion 3 . In addition, it is desirable to dispose the screw 21 on each of the pair of hooks 3 . Also, a nut may be joined to the hooking portion 3 and the screw 21 may be screwed together, or a pair of hooking portions 3 may be connected to each other by a plate-like member and the screw 21 may be arranged at this portion. good. In either case, it is assumed that the screw 21 is arranged in the hook portion 3 .

The tip of the screw 21 contacts the pile head 11 . Therefore, by adjusting the screwing amount of the screw 21, the height of the pile head joining jig 1b can be adjusted. Also, by adjusting the screw 21 of each hook 3, the inclination of the pile head joint jig 1b can be adjusted.

According to the third embodiment, effects similar to those of the first embodiment can be obtained. Further, since the height and inclination can be finely adjusted by the screw 21, even if the upper end of the pile head 11 is uneven, the joint member 15 can be arranged straight at an appropriate position.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not influenced by the above-described embodiments. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. be understood to belong to

For example, each embodiment can be combined with each other.

Reference numerals 1, 1a, 1b …… Jig for joining pile head 3 …… Hanging portion 5 …… Support portion 7 …… Positioning portion 9 …… Connecting portion 11 …… Pile head 13 ………… Foundation pile 15 Joint member 16a Upper plate portion 16b Lower plate portion 16c Joint plate portion 17 Female screw portion 19 Welded portion 21 Screw 100 Pile head joint structure 101 ……Foundation pile 103 ……Foundation ground 105 ……Pile head 107 ……Joining member 109 ……Reinforcement reinforcing bar

Claims (2)

A pile head joint jig for joining a joint member to a pile head ,
a hanging portion that is hung on the upper end of the pile head;
a support portion that supports the joint member;
a connection portion that connects the support portion and the hook portion;
A jig for a pile head joint, comprising: 2. The jig for a pile head joint according to claim 1 , further comprising a positioning portion provided in said support portion or said connecting portion, protruding in substantially the same direction as said hooking portion, and coming into contact with an outer surface of a foundation pile. .

Images