JPH0634416Y2 - Top pile - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] A ready-made pile used in the fields of civil engineering and construction is sunk by adding piles up to a desired depth. The present invention relates to a pile having a screw type joint for performing mutual addition by screwing, and relates to an upper end pile used at the uppermost end of the pile.

[Conventional technology and problems]

Conventionally, as a method of joining ready-made concrete piles,
Like the invention described in the microfilm of Japanese Utility Model Application No. 53-149853 (No. 55-67232), the end plates at the upper and lower ends of ready-made concrete are used to join the end plates together by welding. The usual method is to hold the piles vertically and join them by welding.

However, welding joints require a lot of welding work, and the verticality of the piles is checked visually, so the vertical accuracy is poor, the piles cannot be welded vertically, and the performance of the weld varies depending on the skill of the welder. However, there is a problem that the pile connection does not have sufficiently high accuracy.

Also, when submerging a pile into a previously drilled hole,
It is easy to sink when the pile is rotated while it is sunk, but for this reason, the above-mentioned microfilm is mounted on the joint end plate at the top of the pile with bolts by attaching a disk-shaped mounting plate with four protruding pieces protruding outward. Are listed. That is, a desired number of screw holes are provided in the joint end plate at the upper end of the pile, bolt through holes are also provided in the disc-shaped mounting plate, and the mounting plate is bolted to the joint end plate by using these bolt through holes and screw holes. It is attached. In order to rotate the pile, use four protruding pieces protruding from the mounting plate to the outside of the pile outer circumference, and cover them with cap-shaped rotating jigs with a larger diameter than the pile outer circumference to form the protruding pieces. The stakes are engaged and the pile can be rotated by a rotating jig.

By the above structure, when welding the piles,
By loosening the bolt, the mounting plate with the protruding piece can be removed, and the mounting plate does not interfere with welding. But,
Since the protruding piece protrudes beyond the outer circumference of the pile, and the outer diameter of the cap-shaped rotating jig must therefore be larger than the outer diameter of the pile, it is difficult to stake the pile. However, no proposal has been made to solve this.

Further, a pile having a screw type joint for connecting the piles with each other by a screw type instead of welding is disclosed in Japanese Utility Model Laid-Open No. 60-195328.
No. and Jitsukai Sho 61-84734. However, the piles having screw type joints described in these publications have not been devised for mechanically screwing and joining the piles, and mechanically screwing and joining the piles together. Is virtually impossible.

The purpose of this invention is to be able to screw and join piles mechanically, it is not necessary to attach an auxiliary plate to the pile itself at the pile digging site, and the top end of the pile at the upper end can be placed below the surface of the earth. An object of the present invention is to provide a structure of an upper end pile that allows the protruding piece and the pile rotating jig to be settled without protruding outside the outer diameter of the pile even when the pile is sunk.

[Means for Solving the Problems]

This invention has an upper end pile which has a screw type joint at the end and is used for the uppermost end of the pile in which upper and lower piles are screwed and joined by rotating the pile. It is a hollow concrete pile 20 provided with a screw type joint 22,
A disk-shaped end plate 24 is provided on the upper side of the hollow concrete pile 20, and two or more projecting pieces 23 projecting only toward the hollow portion of the hollow concrete pile 20 are provided at the end plate 24 portion, and A cylindrical body 21 having the same outer diameter as that of the hollow concrete pile 20 and having a thickness smaller than the wall thickness of the concrete portion of the hollow concrete pile 20 is provided so as to project above the end plate 24. To do.

[Action]

The upper pile of this invention has a screw type joint 22 so that the piles can be screwed and joined to each other, but since it is an upper pile used only as the uppermost pile, only the lower side of the pile is It has a screw type joint 22 and does not have a screw type joint on the upper side of the pile.

Two or more projecting pieces 23 provided on the disk-shaped end plate 24 portion on the upper side of the pile and projecting only toward the hollow portion of the hollow concrete pile 20 are for engaging with the rotating jig of the pile. is there.

On the upper side of the hollow concrete pile 20, a cylindrical body having the same outer diameter as the outer diameter of the pile 20, thinner than the wall thickness of the concrete portion of the pile 20, and protruding upward from the upper end plate 24.
21 is a cylindrical body 21 when the rotary jig of the pile is engaged with the pile 20.
By inserting the outermost peripheral portion of the rotating jig along the inner peripheral surface of, the guide body can be exerted by aligning the center of the pile with the center of the rotating jig.

As described above, in the upper end pile of the present invention, the projecting piece 23 on the upper part of the pile does not project to the outer circumference of the pile, and the inner peripheral surface of the cylindrical body 21 provided so as to project upward from the end plate 24 on the upper part. Since it can be used as an insertion guide for the outer peripheral portion of the rotating jig, the rotating jig can also be configured not to project to the outer periphery of the pile. Therefore, when the pile is rotationally sunk by the pile rotating jig, it is not necessary to remove the portion projecting to the pile outer periphery as in the case of the above-mentioned conventional example, and there is no portion projecting to the pile outer periphery. Even when the uppermost end is sunk below the surface of the earth, the pile wall can be easily sunk without scraping the borehole wall.

〔Example〕

FIG. 1 shows an embodiment of the top pile of this invention.
At the position of the upper end plate 24 of the upper end pile 20 made of hollow concrete, a cylindrical body 21 having the same outer diameter as the outer diameter of the pile and thinner than the wall thickness of the concrete portion of the hollow concrete pile 20 is arranged.
It is provided so as to project upward from. Also, projecting pieces 23 projecting inward toward the hollow portion of the pile 20 at two symmetrical positions along the lower surface of the upper end plate 24 are integrated with the pile 20 by such means as being embedded in concrete beforehand. Is attached to.

The protruding piece 23 is used to attach the pile rotating jig 1 and apply a rotating force and a feeding force to the pile 20 as described later. The cylindrical body 21 protruding upward serves as a guide for inserting the pile rotating jig 1 in alignment with the pile core, and
The inner peripheral surface of 21 plays a role of guiding the outer peripheral portion of the pile rotating jig 1.

Further, the upper end pile 20 has the screw type joint 22 only on the lower side, and the illustrated embodiment is a case where the screw type joint 22 is a male screw.

2 (a) to (e) show an upper end pile 20 of the present invention and a pile rotating jig 1 for mechanically rotating the upper end pile 20. As shown in FIG. As shown in FIG. 2 (c), the lower threaded joint 22 of the upper pile 20 and the upper threaded joint of the lower pile 20 '.
29 (female screw in the drawing) is screwed and joined, and the lower pile 2
Join 0'and the top pile 20. 2 (d) corresponds to the AA cross section of FIG. 2 (a), and the positional relationship between the cylindrical body 21, the protruding piece 23 and the end plate 24 when the upper end pile 20 of the present invention is viewed from above. It is shown.

The pile rotating jig 1 has a structure in which the jig main body 2 can rotate about a vertical axis by connecting the shaft portion 4 to a rotating body such as a motor. As shown in FIG. It has a locking member 3 in which a shaped portion is formed. The locking member 3 penetrates the jig body 2 and is movable in the vertical direction with respect to the jig body 2, and the hook 23 formed on the lower portion can hook the protruding piece 23 of the pile 20. . As shown in FIG. 2A and the like, a pair of the locking members 3 are provided at symmetrical positions according to the number of the projecting pieces 23, and the outermost diameter of the pair of locking members 3 is the second. As shown in FIG. (C), the diameter is smaller than the diameter of the hollow portion of the pile 20 so that the locking member 3 can be easily inserted into the hollow portion of the pile 20.

When such a pile rotating jig 1 is lowered toward the upper end pile 20, the lower end of the locking member 3 is moved to the pile 20 as shown in FIG. 2 (a).
Although it may hit the upper end of the protruding piece 23 or the like, the pile rotating jig 1 is lowered toward the upper end pile 20 as it is. At this time,
The cylindrical body 21 protruding above the pile 20 serves as a guide, and the jig body 2 of the pile rotating jig 1 is aligned with the center of the pile 20.
It can descend to the position shown in Fig. 2 (b).

As shown in FIG. 2 (a), when the lower end of the locking member 3 of the pile rotating jig 1 hits the protruding piece 23 of the pile 20 or the like, as shown in FIG. The upper end projects above the jig body 2. When the pile rotating jig 1 is rotated from this state, the locking member 3 also rotates in the circumferential direction, and the locking member 3 moves down when reaching the position where the protruding piece 23 and the like do not exist. Further, when the pile rotating jig 1 is slowly rotated, the hook-shaped portion 5 of the locking member 3 enters below the projecting piece 23 of the pile 20 as shown in FIG. 2 (c).

If the lower end of the locking member 3 does not hit the protruding piece 23 of the upper end pile 20 when the pile rotating jig 1 is first lowered, the locking member 3 does not project and the jig body 2 rotates. As a result, the locking member 3 and the protruding piece 23 are engaged with each other as shown in FIG. 2 (c).

In this way, by visually confirming whether or not the upper end of the locking member 3 projects above the jig main body 2, it is possible to know the engagement state of the pile rotating jig 1, but Whether the upper end of the member 3 projects or not, if the jig body 2 of the pile rotating jig 1 enters the cylindrical body 21 projecting above the pile 20, the jig body 2 can be rotated. Thereby, as shown in FIG. 2C, the locking member 3 and the protruding piece 23 can be engaged with each other.

As shown in FIGS. 2 (a) and 2 (b), the upper end pile 20
If a protrusion piece 27 that protrudes inward is provided on the lower side of the pile, and a locking protrusion 28 is provided on the ground surface at a position where the upper end pile 20 is erected, the pile rotating jig 1 is rotated to the pile 20. It is possible to prevent the piles 20 from rotating together when they are engaged.

As described above, the hook-shaped portion of the locking member 3 is the protruding piece 23 of the pile 20.
When the pile rotating jig 1 is rotated while being in the lower side, the upper end pile 20 can be rotated, and when the pile rotating jig 1 is lifted, the upper end pile 20 is also lifted. Therefore, as shown in FIG. 2 (c), the upper end pile 20 is attached to the pile rotating jig 1
It is suspended from the lower pile 20 'which is already being sunk in the excavation hole, and is further lowered by rotating the pile rotating jig 1 so that the screw type joint at the lower end of the upper pile 20 can be lowered. 22 (male screw) and a screw type joint 29 (female screw) provided on the upper part of the lower pile 20 'are screwed together, and the upper end pile 20 can be screwed and joined onto the lower pile 20'. And since it is a screw-joining method, the upper and lower piles are connected straight in the vertical direction, and uniform performance can be obtained regardless of the arm of the builder.

Although not directly related to this invention, it has a threaded joint 29 (female screw) at the upper end and a threaded joint 22 (male screw) at the lower end.
Even when connecting piles 20 'having a screw, if a projecting piece 23 is provided inside the upper part of the pile 20', a screw type joint at the upper end can be provided.
29 (female screw) plays the role of a guide for the pile rotating jig 1,
Pile 20 'using the same pile rotation jig 1 applied to the top pile 20
Can be screwed together.

As described above, in the upper end pile of the present invention, the projecting piece 23 on the upper part of the pile does not project to the outer circumference of the pile, and the inner peripheral surface of the cylindrical body 21 provided so as to project upward from the end plate 24 on the upper part. Since it can be used as an insertion guide for the outer peripheral portion of the rotating jig, the rotating jig can also be configured not to project to the outer periphery of the pile. Therefore, when the pile is rotationally sunk by the pile rotating jig, it is not necessary to remove the portion projecting to the pile outer periphery as in the case of the above-mentioned conventional example, and there is no portion projecting to the pile outer periphery. Even when the uppermost end is sunk below the surface of the earth, the pile wall can be easily sunk without scraping the borehole wall.

In addition, at the time of joining the piles by screws, since the upper end pile 20 is the uppermost pile, a screw type joint is not required on the upper side of the pile, but the cylindrical body 21 having the above-described configuration is provided on the upper side. By providing the upper end pile 20 of the present invention, the projecting piece 23 at the upper part of the pile does not project to the outer circumference of the pile, and the inner peripheral surface of the cylindrical body 21 provided so as to project upward from the upper end plate. Can be used as an insertion guide for the outer peripheral portion of the pile rotating jig 1, so that the pile rotating jig 1 can also be configured not to project to the outer periphery of the pile. Therefore, when rotating and sinking the upper pile 20 by the pile rotating jig 1, it is not necessary to remove an extra portion projecting to the outer periphery of the pile, and there is no portion projecting to the outer periphery of the pile. Even when it is sunk to the bottom, the pile can be sunk easily without scraping the wall of the hole.

FIG. 3 shows how the piles are sunk in the excavation hole by the pile burying machine 30 while joining the piles by the screw-in joint method.

For reference, an example of the pile rotating jig 1 will be described in more detail.

The pile rotating jig 1 shown in FIGS. 4 and 5 has a jig body 2, a locking member 3 provided in the jig body 2 slidably in the vertical direction, and a rotating force applied to the jig body 2. And a connecting shaft portion 4 for transmitting. Figure 4 is its exploded view,
FIG. 5 shows a state in which the respective members of the pile rotating jig 1 are combined.

The jig body 2 has a cylindrical cap-like shape, and is open at the center of the lower end and the upper end. Around the opening in the center of the upper part, a through hole 6b through which a protruding pin 6 of a locking member 3 described later passes, a through hole 8b for passing a safety pin 8, and a screw hole 16b for joining with a connecting shaft portion. Is provided. A hanging portion 17 for lifting with a crane or the like is formed on the cylindrical side surface, and a part of the side surface is opened as a window portion 14,
The inside is visible when the top pile 20 is attached to the head. Also, although not shown in FIG.
As shown in the figure, the outermost peripheral part of the jig body 2 is
12, the diameter of the outermost periphery is set to a size that can be inserted into the inner peripheral surface of the cylindrical body 21 protruding above the upper end pile 20 described above, so that the cylindrical shape protruding above the upper end pile 20. body
By utilizing the inner peripheral surface of 21 as an insertion guide, the pile rotating jig 1 can be accurately aligned with and engaged with the center of the pile.

Further, as shown in FIG. 4, the connecting shaft portion 4 has a flange 15 at the lower portion, and this flange 15 is provided with a screw hole 16a, and is joined to the jig body 2 by a screw (not shown).
Further, the flange 15 has a through hole 6a and a through hole at positions corresponding to the through hole 6b and the through hole 8b of the jig body 2 described above.
8a is provided, and a locking hole 8f for locking the bent tip portion of the safety pin 8 is provided.

Also, the safety pin 8 is engaged with the shaft portion above the flange 15 before engagement.
An engaging hole 8e is provided for hanging the.

As shown in FIGS. 4 and 5, the lower locking member 3
Are provided at a plurality of positions (two at symmetrical positions in this embodiment) corresponding to the positions of the projecting pieces 23 of the upper end pile 20, and the hook-shaped portion 5 is formed at the lower end. By rotating the pile rotating jig 1, the hook-shaped portion 5 engages with the protruding piece 23 of the upper end pile 20, and in that state, the upper end pile 20 can be suspended by the pile rotating jig 1 or the upper end can be suspended. The pile 20 can be rotated by the pile rotating jig 1. The outermost peripheral portion of the locking member 3 is smaller than the diameter of the hollow portion of the upper end pile 20 so that the locking member 3 can easily descend into the hollow portion of the pile 20.

As shown in FIG. 4, the locking member 3 is also provided at positions corresponding to the through holes 6b and 8b of the jig body 2 described above.
A through hole 6c and a through hole 8c are provided, and as shown in FIG. 5, the projecting pin 6 extending upward is used so as to be slidable up and down with respect to the jig main body 2 and the locking member 3 Is hung from the flange 15 of the connecting shaft portion 4 described above. That is, the projecting pin 6 penetrates the through hole 6b of the jig body 2 and the through hole 6a of the connecting shaft portion 4, and the upper end thereof is suspended by the nut 10. 11 in FIG.
Is a fixed pin. Further, the protruding pin 6 has a screw 9 at the lower end and is screwed into a screw hole 6c formed in the main body of the locking member 3,
A spring 7 is interposed between the screw hole 6c portion and the jig body 2 to normally push the locking member 3 downward.

As described above, when the pile rotating jig 1 is mounted on the head of the upper end pile 20, when the locking member 3 is pushed down with the locking member 3 in contact with the protruding piece 23 of the pile 20, The locking member 3 is pushed up against the biasing force of the spring 7, and as a result, the projecting pin 6 projects above the jig body 2. However, when the pile rotating jig 1 is rotated and the locking member 3 moves away from the contacting state with the protruding piece 23, the force of the spring 7 causes the locking member 3 to move downward.

Further, a hole 8 as a tip receiving portion for the safety pin 8 is provided at the tip of the hook-shaped portion 5 of the locking member 3, and the protruding piece 23 (the protruding piece 23 of the upper end pile 20 is inserted into the hook-shaped portion 5). ) Does not get out. In this way, the safety pin 8 is the pile rotating jig 1
This is for preventing the upper end pile 20 engaged by the above from falling off.

Although the pile rotating jig 1 described above has been described in relation to the upper end pile 20 of the present invention, when the lowermost pile shown in FIG. Pile 2
Even when joining 0's, a pile with an inward projecting piece is provided in the upper part of the hollow part of these piles, and the screw type joint at the upper end projects above the position of the inward projecting piece. if,
The pile rotating jig 1 can be used similarly to the case of the upper pile 20.

Note that FIG. 3 shows an example of pile construction using a pile burying machine that can use the above-described pile rotating jig 1, and the pile rotating jig 1 is attached to the leader 31 of the pile burying machine 30, While rotating the pile rotating jig 1 and rotating the upper end pile 20 by the above-described method, screwing and joining to the upper end of the lower pile 20 ′ in the excavation hole 33 and rotating the pile in the excavation hole 33. Go down. Reference numeral 32 in FIG. 3 is a holder for holding the lower pile so as not to sink during the pile connecting work and for preventing the lower pile from rotating during the connecting work.

Further, in FIG. 5, reference numeral 25 is an injection pipe for feeding a hardening fluid such as mortar to the bottom pile, and 26 is a joint for connecting the injection pipe 25.

[Effect of device]

The upper pile of the present invention is provided with a screw type joint 22 only on the lower side so that the piles can be screwed and joined to each other, and a disc-shaped end plate 24 is provided on the upper side of the pile 20. The 24 portion is provided with two or more projecting pieces 23 projecting only toward the hollow portion of the pile 20, and has the same outer diameter as the outer diameter of the pile 20,
The pile rotating jig 1 is engaged with the pile 20 because it is a hollow concrete upper end pile in which the cylindrical body 21 thinner than the concrete thickness of the pile 20 is provided above the end plate 24. At this time, by inserting the outermost peripheral portion of the pile rotating jig 1 along the inner peripheral surface of the cylindrical body 21, the cylindrical body 21 functions as a guide body, and as a result, the pile body rotates with the center of the pile during insertion. The center of the jig can be aligned.

As described above, the upper end pile 20 of the present invention has a structure in which the projecting piece 23 is located inside the lower position of the cylindrical body 21, and the cap-shaped portion covers the outside of the conventional pile outer peripheral surface. Since the pile rotation jig cannot be used,
Inevitably, the pile rotating jig 1 of the type in which the outermost peripheral portion of the pile rotating jig 1 is inserted along the inner peripheral surface of the cylindrical body 21 must be used.

Further, the upper end pile 20 of the present invention is configured such that the protruding piece 23 on the upper part of the pile does not protrude to the outer circumference of the pile and the outer peripheral portion of the pile rotating jig 1 does not protrude to the outer circumference of the pile as described above. Since there is no need to remove the extra part protruding to the outer circumference of the pile when rotating and staking the pile with the pile rotation jig, there is no part protruding to the outer circumference of the pile, so the uppermost end of the uppermost pile is more than the ground surface. Even when it is sunk to the bottom, the pile can be sunk easily without scraping the wall of the hole.

In this way, since the upper pile of the present invention can join the piles in a screwed joint type, the vertical accuracy of the joined piles is within the tolerance of the screw manufacturing, and the stable pile is achieved regardless of the skill level of the worker. It can be obtained by the conventional pile joining method that the condition can be obtained, and the piles can be joined mechanically using a pile rotating jig, requiring almost no human power, and joining in a shorter time than the welding method joining. In addition to exhibiting the effect that it did not have, as mentioned above, the center of the pile at the time of joining work and the center of the pile rotating jig can be easily aligned, and moreover, when the pile is rotationally sunk by the pile rotating jig, it projects to the outer periphery of the pile. There is no need to remove the extra part and there is no protruding part on the outer periphery of the pile, so
Even when the uppermost end of the top pile is sunk below the surface of the ground, the pile wall can be easily sunk without scraping the borehole wall.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an upper end pile of the present invention, and FIGS. 2 (a) to (c) are sectional views showing a state in which the upper end pile of the present invention is constructed using a pile rotating jig, Figure 2 (d) shows the second
Fig.2 (a) is a sectional view taken along the line AA, Fig.2 (e) is a side view of a pile rotating jig having a structure suitable for construction of the upper pile of this invention, and Fig.3 is an outline of construction by a pile burying machine. Cross section showing
FIG. 4 is an exploded perspective view of a pile rotating jig having a structure suitable for construction of the upper pile of the present invention, and FIG. 5 is a cutaway sectional view showing a combined state when the pile rotating jig is used. 1 ... pile rotating jig, 2 ... jig body, 3 ... locking member,
4 ... Connection shaft, 5 ... Hook, 6 ... Projection pin, 6a, 6
b, 6c ... hole, 7 ... spring, 8 ... safety pin, 8a, 8b, 8c, 8
d, 8e, 8f …… hole, 9 …… screw part, 10 …… nut, 11 ……
Fixing pin, 12 …… guide part, 13 …… bolt, 14 …… window part, 15 …… flange, 16a, 16b …… screw hole, 17 …… hanging part, 20 …… upper end pile, 21 …… cylindrical shape Body, 22 …… Screw type joint (male screw), 23 …… Projecting piece, 24 …… End plate, 25 …… Injection tube, 26 …… Joint, 27 …… Projecting piece, 28 …… Locking protrusion, 29 …… Screw type joint (female screw), 30 …… Pile burying machine, 31
...... Leader, 32 …… Pile holder, 33 …… Drilling hole

Claims (1)

[Scope of utility model registration request] 1. An upper end pile having a threaded joint at its end and used for the uppermost end of a pile in which upper and lower piles are screwed together by rotating the pile, the upper end pile being located at the lower side. Hollow concrete pile (20) with only screw-type fittings (22)
And a disk-shaped end plate (24) is provided on the upper side of the hollow concrete pile (20), and the end plate (24) portion projects only toward the hollow portion of the hollow concrete pile (20). A cylindrical body (21) having two or more protruding pieces (23) and having the same outer diameter as that of the hollow concrete pile (20) and thinner than the wall thickness of the concrete portion of the hollow concrete pile (20). ) Is provided so as to project above the end plate (24), and the upper end pile.