JP6702687B2 - Prestressed concrete pile head cap - Google Patents

Description

This invention is a pile head level adjustment that is mounted in a plurality of screw holes formed in the circumferential direction on the pile head of a prestressed concrete pile that is driven into the ground and has its head side protruding from the ground, and that is height-adjustable. The present invention relates to a prestressed concrete pile head cap in which a pile head cap is fitted and supported by a member, and a pillar of a structure or the like is constructed on the pile head cap.

When supporting the pillars of a structure with concrete piles that are placed in the ground, build a footing foundation on the concrete pile head that is placed in the ground and its head side protrudes from the ground. The piles are integrally supported, the pillars of the structure, etc. are built on the footing foundation, and the pillars of the structure, etc. are supported by the concrete piles placed in the ground through the footing foundation.
The footing foundation is constructed by assembling a formwork, arranging reinforcing bars and the like therein, then pouring concrete into the frame, and hardening the concrete.

JP-A-2002-348887 Japanese Patent Laid-Open No. 2003-253687 JP 2003-261946 A JP-A-2003-313861 JP 2006-336414 A

However, a footing foundation is constructed on the pile head of a concrete pile that is placed in the ground and the head side of which protrudes from the ground, and the pillars of the structure are placed in the ground through the footing foundation. When it is supported, it takes time and labor to construct the footing foundation, and as a result, it is difficult to shorten the entire construction period, and it is difficult to reduce the cost.
By the way, among the concrete piles, prestressed concrete piles are known. In this prestressed concrete pile, a plurality of PC steel materials are stretched inside in the length direction of the pile, and a compressive force is applied to the concrete pile from both ends in the length direction by the PC steel material. For this reason, circular ring-shaped steel plates are attached to both ends of the prestressed concrete pile, which are the pile head and the pile bottom. A plurality of screw holes are formed on the outer surface of this circular ring-shaped steel plate at equal intervals in the circumferential direction. Both ends of the PC steel material inside the prestressed concrete pile are fixed to the circular ring-shaped steel plates at both ends of the concrete pile.
When a predetermined compressive force is applied to the PC steel material inside the prestressed concrete pile, the tip end portion of the operating member of the compressive force imparting device is screwed into a plurality of screw holes of the circular ring-shaped steel plates at both ends of the prestressed concrete pile. This is addressed by pulling in both circular ring-shaped steel plates in which both ends of the PC steel material are fixedly installed and pulled by both sides with a predetermined force. Therefore, as described above, the circular ring-shaped steel plate is attached to the pile head of the prestressed concrete pile, and the plurality of screw holes are formed at equal intervals in the circumferential direction on the circular ring-shaped steel plate. Has been done. This screw hole is used when a predetermined compressive force is applied to the prestressed concrete pile, but is left as it is after that. That is, a plurality of screw holes are still formed in the pile head of the prestressed concrete pile when the pile is placed.

The present invention has been made in view of the above problems to solve the problems, and the purpose thereof is to place prestressed concrete that is placed in the ground and has its head side protruding from the ground. A pile head level adjusting member, which is mounted in a plurality of screw holes formed in the pile head in the circumferential direction so as to be adjustable in height, fits and supports the pile head cap, and the structure of the structure is placed on the pile head cap. An object of the present invention is to provide a prestressed concrete pile head cap that enables pillars and the like to be directly built, shortens the construction period, and reduces the cost.

In order to achieve the above object, the invention of claim 1 has a plurality of screw holes circumferentially formed in a pile head of a prestressed concrete pile that is driven into the ground and has its head side protruding from the ground. A plurality of pile head level adjusting members that are respectively screwed and mounted so that height adjustment is possible, a support cylinder that is mounted on the outer peripheral side of the pile head side of the prestressed concrete pile, and a pre-fixed fixed to the upper end of the support cylinder. A flat plate-shaped support plate placed on and supported by the upper ends of the plurality of pile head level adjusting members mounted on the pile head of the stress concrete pile, and an outer side of the pile head side of the prestressed concrete pile and a support tube And mortar that is injected into the gap between the inside of the support plate and the mortar that fixes the support cylinder and the support plate to the pile head side of the prestressed concrete pile after hardening and the mortar that is formed around the center of the support plate. The mortar before hardening, which has been injected between the inner periphery of the support cylinder and the outer periphery of the pile head side of the prestressed concrete pile, is fixed at the lower end of the support cylinder and flows out of the mortar before hardening. And a mortar backing plate to prevent the prestressed concrete piles from being placed at an angle and the surface of the pile heads is not horizontal . It comprises means for adjusting the height of each pile head level adjusting member screwed into the screw hole to easily adjust the upper end of each pile head level adjusting member to a horizontal plane state.

In order to achieve the above object, the invention of claim 2 provides a plurality of screw holes circumferentially formed in a pile head of a prestressed concrete pile that is driven into the ground and has its head side protruding from the ground. A plurality of pile head level adjusting members that are respectively screwed and mounted so that the height can be freely adjusted, a support cylinder that is mounted on the outer peripheral side of the pile head side of the prestressed concrete pile, and a support cylinder that is mounted on the outer peripheral side of the support cylinder. A reinforcing plate expanding upward and a plurality of the above-mentioned pile head level adjusting members mounted on the pile heads of prestressed concrete piles, which are fixed to the upper end of the support cylinder and reinforced and supported by the reinforcing plate, and are supported by being mounted on the upper ends thereof. Pile of prestressed concrete pile, which is injected into the gap between the flat plate-shaped support plate and the outside of the pile head side of the prestressed concrete pile and the inside of the support tube and the support plate after hardening. Mortar to fix to the head side, multiple mortar injection holes for injecting mortar formed around the center of the support plate, the inner peripheral side of the support cylinder fixed to the lower end of the support cylinder and the prestressed concrete pile A mortar receiving plate that prevents the mortar that has been injected between the pile head side and the outer peripheral side before curing from falling and flowing out, and a slide adjusting plate that is slidably mounted on the upper surface of the supporting plate. Even if the prestressed concrete piles are installed at an angle and the surface of the pile heads is not horizontal, each pile head screwed into multiple screw holes formed in the circumferential direction on the pile head of the prestressed concrete pile. It comprises means for adjusting the height of the level adjusting member to easily adjust the upper end of each pile head level adjusting member to a horizontal plane state.

In order to achieve the above object, the invention of claim 3 provides a plurality of screw holes formed in the circumferential direction in the pile head of a prestressed concrete pile that is placed in the ground and the head side of which projects from the ground. A plurality of pile head level adjusting members that are respectively screwed in and mounted so that the height can be freely adjusted, a support cylinder that is attached to the outer peripheral side of the pile head side of the prestressed concrete pile, and a prestress that is fixed to the upper end of the support cylinder. A flat plate-like support plate placed on and supported by the upper ends of a plurality of pile head level adjusting members mounted on the pile head of a concrete pile, and an outer side of the pre-stressed concrete pile on the pile head side, a support tube, and a support Mortar for fixing the support cylinder and the support plate to the pile head side of the prestressed concrete pile after being injected into the gap with the inner side of the plate and hardening, and a plurality of mortars for injecting the mortar formed around the center of the support plate. Before the hardening mortar injected between the mortar injection hole and the inner peripheral side of the support cylinder fixed to the lower end of the support cylinder and the outer peripheral side of the pile head side of the prestressed concrete pile falls and flows out. A mortar support plate to prevent and a plurality of mortar support plates are attached in the circumferential direction of the side peripheral surface of the support cylinder and are screwed through the side peripheral surface of the support cylinder so that the tips are on the outer peripheral side surface of the pile head side of the internal prestressed concrete pile. A pile core adjusting member that abuts and adjusts the horizontal movement of the support cylinder, and the pile of the prestressed concrete pile is installed even if the surface of the pile head is not horizontal when the prestressed concrete pile is tilted and placed. Means for easily adjusting the height of each pile head level adjusting member screwed into a plurality of screw holes formed in the head in the circumferential direction to easily adjust the upper end of each pile head level adjusting member to a horizontal plane state It consists of

In order to achieve the above-mentioned subject, the invention of claim 4 provides a plurality of screw holes formed in the circumferential direction in the pile head of a prestressed concrete pile that is placed in the ground and has its head side protruding from the ground. A plurality of pile head level adjusting members that are respectively screwed in and mounted so that the height can be freely adjusted, a support cylinder attached to the outer peripheral side of the pile head side of the prestressed concrete pile, and an upper side attached to the outer peripheral side of the support cylinder. And a reinforcement plate that expands toward the upper end of a plurality of pile head level adjusting members that are fixed to the upper end of a support cylinder and are reinforced and supported by the reinforcing plate and that are mounted on the pile heads of prestressed concrete piles. The support plate and the support plate in the shape of a flat plate and the support cylinder and the support plate are poured into the gap between the outside of the pile head side of the prestressed concrete pile and the inside of the support cylinder and the support plate, and after hardening, the support cylinder and the support plate are pile head side of the prestressed concrete pile. Mortar to be fixed to the mortar, a plurality of mortar injection holes for injecting mortar formed around the center of the support plate, and the inner peripheral side of the support cylinder fixed to the lower end of the support cylinder and the pile of prestressed concrete pile Mortar receiving plate that prevents mortar before hardening injected between the head side and the outer peripheral side from falling and flowing out, and a plurality of side peripheral surfaces of the support cylinder that are attached in the peripheral surface direction of the side peripheral surface of the support cylinder. A prestressed concrete pile, which is screwed through the end of the prestressed concrete pile to adjust the horizontal movement of the support cylinder by contacting the outer peripheral side surface on the pile head side of the internal prestressed concrete pile. Even if the pile head is tilted and the surface of the pile head is not horizontal, the height of each pile head level adjusting member screwed into the multiple screw holes formed in the pile head of the prestressed concrete pile in the circumferential direction. To adjust the upper end of each pile head level adjusting member to a horizontal plane state.

Further, as a preferred embodiment of the inventions of claims 1 to 4, it comprises means for fixing the support plate to a part of the pile head level adjusting member through the mortar injection hole.

According to the invention of claim 1, which comprises means for solving the problems, a plurality of screws formed in the circumferential direction on the pile head of a prestressed concrete pile that is driven into the ground and has its head side protruding from the ground. Using the hole, screw the pile head level adjusting member into this screw hole, and rotate it in either direction to make the screw movement so that the height of the upper end of each pile head level adjusting member can be easily and finely adjusted. Can be adjusted. Even if the prestressed concrete piles are tilted and the surface of the pile heads is not horizontal, the height of each pile head level adjusting member is adjusted so that the upper end of each pile head level adjusting member is flat. Can be easily adjusted to the state. This makes it possible to easily adjust the height of the support plate of the prestressed concrete pile head cap supported at the upper end of each pile head level adjustment member, and to support the pile head cap support plate even when the surface of the pile head is not horizontal. It is possible to easily level and build a prestressed concrete pile head cap above the pile head of the prestressed concrete pile, and it is possible to directly build the pillars of the structure on this pile head cap, Can be shortened and the cost can be reduced.

Further, according to the invention of claim 2, by utilizing a plurality of screw holes formed in the circumferential direction in the pile head of the prestressed concrete pile which is driven into the ground and the head side of which is projected from the ground, The height of the upper end of each pile head level adjusting member can be easily and finely adjusted by screwing the pile head level adjusting member into the screw hole and rotating the pile head level adjusting member in any direction. Even if the prestressed concrete piles are tilted and the surface of the pile heads is not horizontal, the height of each pile head level adjusting member is adjusted so that the upper end of each pile head level adjusting member is flat. Can be easily adjusted to the state. This makes it possible to easily adjust the height of the support plate of the prestressed concrete pile head cap supported at the upper end of each pile head level adjustment member, and to support the pile head cap support plate even when the surface of the pile head is not horizontal. It is possible to easily level and build a prestressed concrete pile head cap above the pile head of the prestressed concrete pile, and it is possible to directly build the pillars of the structure on this pile head cap, Can be shortened and the cost can be reduced.
Furthermore, the slide adjustment plate that is slidably attached to the support plate of the prestressed concrete pile head cap supports the pillars of the building structure constructed above the pile and the core of the center axis of the pile head of the prestressed concrete pile. The deviation can be easily adjusted.
In addition to this, the upper support plate is made wider than the lower support cylinder by supporting the lower surface of the support plate that overhangs 360 degrees from the peripheral edge of the support cylinder of the prestressed concrete pile cap with a reinforcing plate. As a result, the prestressed concrete pile head cap with a wider support plate can sufficiently cope with large misalignment of the center axis of the prestressed concrete pile that has been sunk due to manufacturing and construction errors of the building structure. can do.

Further, according to the invention of claim 3, by utilizing a plurality of screw holes formed in the circumferential direction in the pile head of the prestressed concrete pile which is driven into the ground and the head side of which is projected from the ground, The height of the upper end of each pile head level adjusting member can be easily and finely adjusted by screwing the pile head level adjusting member into the screw hole and rotating the pile head level adjusting member in any direction. Even if the prestressed concrete piles are tilted and the surface of the pile heads is not horizontal, the height of each pile head level adjusting member is adjusted so that the upper end of each pile head level adjusting member is flat. Can be easily adjusted to the state. This makes it possible to easily adjust the height of the support plate of the prestressed concrete pile head cap supported at the upper end of each pile head level adjustment member, and to support the pile head cap support plate even when the surface of the pile head is not horizontal. It is possible to easily level and build a prestressed concrete pile head cap above the pile head of the prestressed concrete pile, and it is possible to directly build the pillars of the structure on this pile head cap, Can be shortened and the cost can be reduced.
Furthermore, each pile core adjustment member attached to the support cylinder of the prestressed concrete pile head cap allows easy adjustment of the horizontal movement of the support cylinder, and is fixed to the upper end through the movement of the support cylinder. It is possible to easily adjust the horizontal movement of the supporting plate that is installed, which allows the center of the pile head of the prestressed concrete pile and the center axis of the prestressed concrete pile head cap to be adjusted. It can be done easily. Also, after the adjustment by each pile core adjustment member, the support cylinder is prevented from moving in the horizontal direction, so this prevents the prestressed concrete pile head cap from moving in the horizontal direction after the pile core adjustment. You can

Further, according to the invention of claim 4, by utilizing a plurality of screw holes formed in the circumferential direction in the pile head of the prestressed concrete pile which is driven into the ground and the head side of which is projected from the ground, The height of the upper end of each pile head level adjusting member can be easily and finely adjusted by screwing the pile head level adjusting member into the screw hole and rotating the pile head level adjusting member in any direction. Even if the prestressed concrete piles are tilted and the surface of the pile heads is not horizontal, the height of each pile head level adjusting member is adjusted so that the upper end of each pile head level adjusting member is flat. Can be easily adjusted to the state. This makes it possible to easily adjust the height of the support plate of the prestressed concrete pile head cap supported at the upper end of each pile head level adjustment member, and to support the pile head cap support plate even when the surface of the pile head is not horizontal. It is possible to easily level and build a prestressed concrete pile head cap above the pile head of the prestressed concrete pile, and it is possible to directly build the pillars of the structure on this pile head cap, Can be shortened and the cost can be reduced.
Furthermore, each pile core adjustment member attached to the support cylinder of the prestressed concrete pile head cap allows easy adjustment of the horizontal movement of the support cylinder, and is fixed to the upper end through the movement of the support cylinder. It is possible to easily adjust the horizontal movement of the supporting plate that is installed, which allows the center of the pile head of the prestressed concrete pile and the center axis of the prestressed concrete pile head cap to be adjusted. It can be done easily. Also, after the adjustment by each pile core adjustment member, the support cylinder is prevented from moving in the horizontal direction, so this prevents the prestressed concrete pile head cap from moving in the horizontal direction after the pile core adjustment. You can
In addition to this, the upper support plate is made wider than the lower support cylinder by supporting the lower surface of the support plate that overhangs 360 degrees from the peripheral edge of the support cylinder of the prestressed concrete pile cap with a reinforcing plate. As a result, the prestressed concrete pile head cap with a wider support plate can sufficiently cope with large misalignment of the center axis of the prestressed concrete pile that has been sunk due to manufacturing and construction errors of the building structure. can do.

Further, in the case of the invention of claim 5, in addition to the effects of the inventions of claims 1 to 4, the prestressed concrete pile head cap is attached to the pile head level adjusting member mounted on the pile head of the prestressed concrete pile. By fixing the support plate of, even if something hits the prestressed concrete pile head cap, it is possible to prevent the prestressed concrete pile head cap from rotating. This can prevent the orientation of the prestressed concrete pile head cap from changing and can prevent the orientation of the pillar of the structure constructed on the pile head cap from being affected in advance.

It is a disassembled perspective view of the prestressed concrete pile head cap and prestressed concrete pile which shows the form-1 for implementing this invention. It is a perspective view which attached the prestressed concrete pile head cap which shows the form 1 for implementing this invention to the pile head part of a prestressed concrete pile. It is a side view which attached the prestressed concrete pile head cap which shows the form 1 for implementing this invention to the pile head part of a prestressed concrete pile. It is a top view which attached the prestressed concrete pile head cap which shows the form 1 for implementing this invention to the pile head part of a prestressed concrete pile. It is a disassembled perspective view of the prestressed concrete pile head cap and the prestressed concrete pile which shows the form-2 for implementing this invention. It is a perspective view which mounted the prestressed concrete pile head cap which shows the form-2 for implementing this invention in the pile head part of a prestressed concrete pile. It is a side view which attached the prestressed concrete pile head cap which shows the form-2 for implementing this invention in the pile head part of a prestressed concrete pile. It is a top view which attached the prestressed concrete pile head cap which shows the form-2 for implementing this invention to the pile head part of a prestressed concrete pile.

Hereinafter, the present invention will be described more specifically based on Embodiments-1 and 2 for carrying out the invention described in the drawings.

[Embodiment-1]
In Embodiment-1 illustrated in FIGS. 1 to 4, a prestressed concrete pile head cap 1 is circumferentially mounted on a pile head 61 of a prestressed concrete pile 6 which is placed in the ground and whose head side projects from the ground. It is fitted and supported by a pile head level adjusting member 11 which is screwed into a plurality of screw holes 62 formed in the direction and is mounted so that its height can be adjusted freely, and a pillar of a structure or the like is constructed thereon. is there.

The prestressed concrete pile head cap 1 is mounted in the screw hole 62 formed in the pile head 61 of the prestressed concrete pile 6 which is placed in the ground and the head side of which projects from the ground, and the height of which can be adjusted freely. The level adjusting member 11, the support cylinder 12 attached to the outer peripheral side on the pile head 61 side, the reinforcing plate 13 attached to the outer peripheral side of the support cylinder 12, and the upper end of the support cylinder 12 fixed to the pile head 61. The support plate 14 supported by the plurality of pile head level adjusting members 11, and the support cylinder 12 and the support plate 14 after being injected into the gap between the outer side on the pile head 61 side and the inner side of the support cylinder 12 and the support plate 14 and hardening. A mortar 15 for fixing the mortar to the pile head side of the prestressed concrete pile, a plurality of mortar injection holes 14a formed in the support plate 14, and a mortar receiving plate 16 fixed to the lower end of the support cylinder 12. There is.

The pile head level adjusting member 11 utilizes a plurality of screw holes 62 formed in the circumferential direction in the pile head 61 of the prestressed concrete pile 6 which is driven into the ground and whose head side projects from the ground. The front end side, that is, the lower end side is screwed into the screw hole 62, and the upper end thereof is adjusted and mounted so as to project upward from the surface of the pile head 61 to a predetermined height. In the drawing, the pile head level adjusting members 11 are attached at intervals of 120 degrees in the circumferential direction.

The pile head level adjusting member 11 has a spiral screw thread that is screwed into the screw hole 62 on its side peripheral surface. Each of the pile head level adjusting members 11 has its tip side, that is, the lower end side, screwed into a plurality of screw holes 62 formed in the pile head 61 of the prestressed concrete pile 6, and the pile of the prestressed concrete pile 6 is screwed. The height of the protrusion from the surface of the head 61 can be finely adjusted. For the pile head level adjusting member 11, for example, a bolt is used.

Each of the pile head level adjusting members 11 is inserted into a plurality of screw holes 62 formed in the pile head 61 of the prestressed concrete pile 6 on the tip side, that is, the lower end side, and is prestressed at the upper end adjusted to a predetermined height. The support plate 14 that constitutes the concrete pile head cap 1 is supported from below. That is, the lower surface of the support plate 14 contacts the upper ends of the pile head level adjusting members 11. Since the upper end of each pile head level adjusting member 11 is adjusted to a predetermined height, the height of the surface of the support plate 14 placed on the pile head level adjusting member 11 is also adjusted by adding the plate thickness to a constant height.

As described above, each pile head level adjusting member 11 adjusts the height of the support plate 14 by adjusting the height direction of the upper end thereof. That is, the pile head level adjusting member 11 can freely adjust the height from the pile head 61 of the prestressed concrete pile 6 to the upper surface which is the surface of the support plate 14 of the prestressed concrete pile head cap 1.

A support plate 14 of the pile head cap 1 is fixed to a part of the pile head level adjusting member 11 that adjusts the height of the prestressed concrete pile head cap 1. Fixing is performed using the mortar injection hole 14a. The upper end of the pile head level adjusting member 11 facing the inside of some of the mortar injection holes 14a and a part of the inner circumference of the mortar injection hole 14a are fixed by, for example, temporary welding. When fixing, adhesive may be used instead of tack welding.

The diameter of the head on the upper end side of the pile head level adjusting member 11 is larger than the diameter of the tip side into which it is screwed in, and is sufficiently larger than the inner diameter of the mortar injection hole 14a. Therefore, even if the mortar injection hole 14a of the support plate 14 is located right above the upper end of the pile head level adjusting member 11, the support plate 14 is supported by the upper end of the pile head level adjusting member 11 directly below and sinks. There is no such thing.

The support cylinder 12 is attached to the outer peripheral side of the prestressed concrete pile 6 on the pile head 61 side. The inner diameter of the support cylinder 12 is sufficiently larger than the outer diameter on the pile head 61 side, and there is a gap between the inner diameter and the outer diameter in which the mortar 15 can be sufficiently filled. The support cylinder 12 is formed of a steel cylindrical plate. The support cylinder 12 is fixed to the pile head 61 side of the prestressed concrete pile 6 by the mortar 15 which is hardened on the outer peripheral side on the pile head 61 side.

On the side peripheral surface 12a of the support cylinder 12, steel reinforcing plates 13 are arranged radially from the center of the support cylinder 12 toward the periphery. One vertical end of each reinforcing plate 13 is welded and fixed to the side peripheral surface 12a of the support cylinder 12. Each reinforcing plate 13 has an inverted pyramidal shape in which the protruding length from the side peripheral surface 12a of the support cylinder 12 is expanded upward. Each reinforcing plate 13 reinforces the support plate 14 from the outside to increase its rigidity.

In the figure, for example, the reinforcing plates 13 are arranged radially from the center of the support cylinder 12 in the eight directions at an equal angle of 45 degrees in the circumferential direction, but each reinforcing plate 13 has a protruding length to the outside. It becomes longer and shorter alternately. That is, the reinforcing plate 13 having a long overhanging length is arranged in a cross shape at an equal angle of 90 degrees, and the reinforcing plate 13 having a short overhanging length is displaced in the cross shape at an angle of 45 degrees in the middle of this cross shape arrangement. It is located in.

Each of the reinforcing plates 13 having a long and short projecting length has the same length on the lower end side, but the projecting lengths are different upward. That is, the reinforcing plate 13 having the longer protruding length has a longer protruding length toward the upper side, and the reinforcing plate 13 having the shorter protruding length has a shorter protruding length toward the upper side. The side end of each reinforcing plate 13 on the projecting side is linearly inclined obliquely forward toward the upper side.

A flat plate-shaped support plate 14 is welded and fixed to the upper side of the support cylinder 12 and each of the reinforcing plates 13. The support plate 14 has a function of supporting a load acting through the columns of the building structure and directly transmitting the load to the pile head 61 side of the prestressed concrete pile 6.

The support plate 14 is placed on and supported by the upper ends of a plurality of pile head level adjusting members 11 that are protruded upward from the pile head 61 of the prestressed concrete pile 6 and screwed and mounted, and then injected and hardened. It is fixed to the upper side of the pile head 61 of the prestressed concrete pile 6 by 15. That is, the support plate 14 is mounted and mounted so that the center side thereof covers the pile head 61 side of the prestressed concrete pile 6 from above.

The support plate 14 has, for example, a square shape when viewed from a plane, and the upper end of the reinforcing plate 13 arranged in a cross shape having a longer projecting length is welded to a square diagonal position on the lower surface of the support plate 14 by welding. There is. Further, the upper end of the reinforcing plate 13 arranged in a cross shape having a shorter protruding length is welded to a cross line position connecting midpoints of two opposite sides of the square of the lower surface of the support plate 14.

The length of one side of the support plate 14 having a square shape, for example, located at the upper portion of the prestressed concrete pile head cap 1 is several times the diameter of the circular support cylinder 12 located at the lower portion of the support plate 14, The cap 1 has an inverted pyramid shape that expands upward. The upper support plate 14 is made wider than the lower support cylinder 12 in order to cope with the misalignment of the center axis of the prestressed concrete pile 6 that has been sunk due to manufacturing errors and construction errors of the building structure. Is.

That is, due to manufacturing and construction errors, the central axis of the pillar of the building structure does not match the central axis of the pile head 61 of the prestressed concrete pile 6, and the central axis of the pillar of the building structure is the center of the pile head 61. The shaft is displaced in all directions of 360 degrees from the position of the shaft, but in order to cope with the displacement in any direction of all directions, the support plate 14 on the upper side compared to the support tube 12 on the lower side. Is widened.

Around the center of the support plate 14, a plurality of mortar injection holes 14a for injecting the mortar 15 are formed at equal intervals in the circumferential direction. Each mortar injection hole 14a collects between the outside of the prestressed concrete pile 6 on the pile head 61 side and the inside of the support cylinder 12 and the support plate 14 when the mortar 15 is injected from the other mortar injection hole 14a. It also functions as an exhaust hole for the air being discharged.

The mortar 15 is filled and injected into a gap formed between the outer side of the prestressed concrete pile 6 on the pile head 61 side and the inner sides of the support cylinder 12 and the support plate 14 constituting the prestressed concrete pile head cap 1 and cured. After that, the pile head cap 1 including the support cylinder 12 and the support plate 14 is fixed to the outside of the prestressed concrete pile 6 on the side of the pile head 61. For this mortar 15, for example, a non-shrinkable mortar is used.

After that, the base plate at the lower end of the pillar of the building structure (not shown) is connected and fixed to the pile head cap 1 fixed to the pile head 61 side of the prestressed concrete pile 6, for example, an adjustment connection plate is fillet welding or bolts. Fixed by. The pile head cap 1 is located between the base plate at the lower end of the pillar of the building structure and the pile head 61 of the prestressed concrete pile 6 to support the total load of the building structure and to pile the prestressed concrete pile 6. It plays the role of releasing it to the head 61 side.

When the mortar 15 injected into the outer peripheral side surface 63 side of the prestressed concrete pile 6 on the side of the pile head 61 of the prestressed concrete pile 6 has fluidity before being particularly hardened, the mortar receiving plate 16 falls down on the outer peripheral side surface 63 side and flows out. It serves to prevent it from staying and stay on the outer peripheral side surface 63 side of the pile head 61 side.

The mortar support plate 16 is composed of, for example, two semi-circular ring plates, and in a state where the mortar support plate 16 is in close contact with the outer peripheral side surface 63 on the pile head 61 side of the prestressed concrete pile 6 from both sides, the lower end 12b of the support cylinder 12 is Is fixed in the circumferential direction. The mortar 15 acting on the mortar receiving plate 16 is the amount filled in the gap between the inner peripheral side of the support cylinder 12 and the outer peripheral side surface 63 side of the pile head 61 side. Is sufficient, and welding does not take time.

The slide adjustment plate 18 is an adjustment plate that is slidably attached to the upper surface of the support plate 14 of the pile head cap 1 as needed, and has, for example, a rectangular shape. The slide adjustment plate 18 is attached to the upper surface of the support plate 14 of the pile head cap 1 when the central axis of the prestressed concrete pile head cap 1 is deviated from the central axis of the pillar or the like of the building structure by measurement. The slide adjusting plate 18 is placed on the upper surface of the support plate 14 of the pile head cap 1, and is slid on the upper surface so that the center of the upper surface thereof coincides with the central axis of the pillar or the like of the building structure, for example. Is fixed to the upper surface of the support plate 14 by welding, for example.

Next, a construction method using the prestressed concrete pile head cap will be described below.
The prestressed concrete pile 6 is sunk in the ground at a predetermined position by using a machine for driving the prestressed concrete pile 6 to a predetermined depth. At this time, the prestressed concrete pile 6 that has been cast and sunk in the ground has its pile head 61 side slightly protruding from the ground. The prestressed concrete pile 6 that has been sunk may not be sunk straight and may be slightly tilted or misaligned depending on the construction condition at the time of placing and the condition of the ground. When the prestressed concrete pile 6 is tilted, the surface of the pile head 61 is not horizontal but tilted.

On the surface of the pile head 61 of the prestressed concrete pile 6 projecting from the ground, a plurality of screw holes 62 used to apply a predetermined compressive force to the prestressed concrete pile 6 are arranged at equal intervals in the circumferential direction, Three pieces are formed in the drawing. The pile head level adjusting members 11 are attached to the plurality of screw holes 62, respectively. Since a spiral screw thread is formed on the side peripheral surface of the pile head level adjusting member 11, it is screwed into the screw hole 62.

The height of the upper end of each mounted pile head level adjusting member 11 can be finely adjusted by a screw movement. When the surface of the pile head 61 of the prestressed concrete pile 6 is tilted, the protrusion height from the surface of the pile head 61 of the pile head level adjusting member 11 on the tilted side is slightly increased, The heights of the plurality of pile head level adjusting members 11 protruding from the surface of the pile head 61 are adjusted to be the same. At this time, the predetermined height of the upper end of each pile head level adjusting member 11 is adjusted in consideration of the plate thickness of the support plate 14 of the prestressed concrete pile head cap 1.

After this, the work of mounting the main body of the prestressed concrete pile head cap 1 is performed. For mounting the main body of the prestressed concrete pile head cap 1, the support cylinder 12 fixed to the lower surface of the support plate 14 constituting the pile head cap 1 is installed from above the pile head 61 of the prestressed concrete pile 6 to the inside thereof. Fit and fit so that The pile head 61 and the outer peripheral side surface 63 thereof are completely settled inside the support cylinder 12 and the support plate 14.

When the prestressed concrete pile head cap 1 is lowered, the prestressed concrete pile heads 6 are screwed to the screw holes 62 of the pile heads 61 of the prestressed concrete piles 6 at the upper ends of the plurality of pile head level adjusting members 11 which are mounted and adjusted to a predetermined height. The lower surface of the support plate 14 forming the pile head cap 1 abuts. As a result, the prestressed concrete pile head cap 1 is supported by the plurality of pile head level adjusting members 11 at a predetermined horizontal level without the upper surface of the support plate 14 tilting. Adjustment can be performed very easily.

After supporting the prestressed concrete pile head cap 1 at a predetermined horizontal level with a plurality of pile head level adjusting members 11 mounted on the pile head 61 of the prestressed concrete pile 6, the pile head 61 of the prestressed concrete pile 6 is supported. The core of the prestressed concrete pile head cap 1 is adjusted with the center of the pile.

At this time, if the center axis of the prestressed concrete pile head cap 1 is deviated from the center axis of the pillar or the like of the building structure by measurement, a square slide, for example, on the upper surface of the support plate 14 of the pile head cap 1 The adjusting plate 18 is slidably mounted. The slide adjusting plate 18 is placed on the upper surface of the support plate 14 of the pile head cap 1, and the slide adjusting plate 18 is placed so that, for example, the center of the upper surface of the slide adjusting plate 18 coincides with the central axis of the pillar or the like of the building structure. The slide adjustment plate 18 is fixed to the upper surface of the support plate 14 by welding or the like at the corresponding position (see FIG. 3).

After adjusting the pile cores of the center axis of the pile head 61 of the prestressed concrete pile 6 and the center axis of the prestressed concrete pile head cap 1, the prestressed concrete pile head cap 1 should not rotate at that position. Utilizing the mortar injection hole 14a formed in the support plate 14, the upper end of the pile head level adjusting member 11 located at a position facing one of the plurality of mortar injection holes 14a is temporarily welded to the mortar injection hole 14a. The support plate 14 is fixed to the inner peripheral surface, and the support plate 14 is fixed to one pile head level adjusting member 11. Thus, it is possible to prevent the prestressed concrete pile head cap 1 from rotating even if something hits it through the fixed support plate 14.

After fixing the prestressed concrete pile head cap 1 to the pile head 61 of the prestressed concrete pile 6 via the pile head level adjusting member 11, the support cylinder 12 is accurately centered without shifting to the outer peripheral side of the pile tip side 63. Be attached to. The mortar receiving plate 16 divided into two semicircular ring plates is attached to the lower end 12b of the support cylinder 12 by sandwiching the outer peripheral side surfaces 63 on the pile head 61 side of the prestressed concrete pile 6 from both sides, and fixed by temporary welding. ..

After that, through the mortar injection hole 14a of the support plate 14, into the gap between the outer side of the prestressed concrete pile 6 on the pile head 61 side and the support cylinder 12 of the prestressed concrete pile head cap 1 and the inner side of the support plate 14. Inject mortar 15. When the injected mortar 15 is sufficiently filled in the gap between the outside on the pile head 61 side and the inside of the support cylinder 12 and the support plate 14, a part of the injected mortar 15 leaks from the mortar injection hole 14a. Check this and stop the injection as it starts.

The injected mortar 15 is received by the mortar receiving plate 16 and is prevented from falling and flowing out on the outer peripheral side of the prestressed concrete pile 6 on the pile head 61 side. When the injected mortar 15 hardens between the outer side of the pile head 61 side and the inner side of the support cylinder 12 and the support plate 14, the prestressed concrete pile head cap 1 is acted on by the mortar 15 after hardening to prestress the concrete pile. 6 is fixed to the pile head 61 side.

A slide adjusting plate fixed on the upper side of the pile head 61 of the prestressed concrete pile 6 with the hardened mortar 15 and then on the support plate 14 of the prestressed concrete pile head cap 1 or on the upper surface of the support plate 14. The building structure, for example, the lower end of a pillar is attached to the top of 18, and each pillar of the building structure is supported on the pile head 61 side of each prestressed concrete pile 6 via the prestressed concrete pile head cap 1.

[Embodiment-2]
In Embodiment-2 illustrated in FIGS. 5 to 8, the prestressed concrete pile head cap 1 is installed around the circumference of a pile head 61 of a prestressed concrete pile 6 which is placed in the ground and whose head side projects from the ground. It is fitted and supported by a pile head level adjusting member 11 which is screwed into a plurality of screw holes 62 formed in the direction and is mounted so that its height can be adjusted freely, and a pillar of a structure or the like is constructed thereon. is there.

The prestressed concrete pile head cap 1 is mounted in the screw hole 62 formed in the pile head 61 of the prestressed concrete pile 6 which is placed in the ground and the head side of which projects from the ground, and the height of which can be adjusted freely. The level adjusting member 11, the support cylinder 12 attached to the outer peripheral side on the pile head 61 side, the reinforcing plate 13 attached to the outer peripheral side of the support cylinder 12, and the upper end of the support cylinder 12 fixed to the pile head 61. The support plate 14 supported by the plurality of pile head level adjusting members 11, and the support cylinder 12 and the support plate 14 after being injected into the gap between the outer side on the pile head 61 side and the inner side of the support cylinder 12 and the support plate 14 and hardening. Mortar 15 for fixing the above to the pile head side of the prestressed concrete pile, a plurality of mortar injection holes 14a formed in the support plate 14, a mortar receiving plate 16 fixed to the lower end of the support cylinder 12, and the support cylinder 12 A plurality of pile core adjusting members 17 attached to the side peripheral surface of the pile adjusting member 17 for adjusting the movement of the support cylinder 12 in the horizontal direction.

The pile head level adjusting member 11 utilizes a plurality of screw holes 62 formed in the circumferential direction in the pile head 61 of the prestressed concrete pile 6 which is driven into the ground and whose head side projects from the ground. The front end side, that is, the lower end side is screwed into the screw hole 62, and the upper end thereof is adjusted and mounted so as to project upward from the surface of the pile head 61 to a predetermined height. In the drawing, the pile head level adjusting members 11 are attached at intervals of 120 degrees in the circumferential direction.

The pile head level adjusting member 11 has a spiral screw thread that is screwed into the screw hole 62 on its side peripheral surface. Each of the pile head level adjusting members 11 has its tip side, that is, the lower end side, screwed into a plurality of screw holes 62 formed in the pile head 61 of the prestressed concrete pile 6, and the pile of the prestressed concrete pile 6 is screwed. The height of the protrusion from the surface of the head 61 can be finely adjusted. For the pile head level adjusting member 11, for example, a bolt is used.

Each of the pile head level adjusting members 11 is inserted into a plurality of screw holes 62 formed in the pile head 61 of the prestressed concrete pile 6 on the tip side, that is, the lower end side, and is prestressed at the upper end adjusted to a predetermined height. The support plate 14 that constitutes the concrete pile head cap 1 is supported from below. That is, the lower surface of the support plate 14 contacts the upper ends of the pile head level adjusting members 11. Since the upper end of each pile head level adjusting member 11 is adjusted to a predetermined height, the height of the surface of the support plate 14 placed on the pile head level adjusting member 11 is also adjusted by adding the plate thickness to a constant height.

As described above, each pile head level adjusting member 11 adjusts the height of the support plate 14 by adjusting the height direction of the upper end thereof. That is, the pile head level adjusting member 11 can freely adjust the height from the pile head 61 of the prestressed concrete pile 6 to the upper surface which is the surface of the support plate 14 of the prestressed concrete pile head cap 1.

A support plate 14 of the pile head cap 1 is fixed to a part of the pile head level adjusting member 11 that adjusts the height of the prestressed concrete pile head cap 1. Fixing is performed using the mortar injection hole 14a. The upper end of the pile head level adjusting member 11 facing the inside of some of the mortar injection holes 14a and a part of the inner circumference of the mortar injection hole 14a are fixed by, for example, temporary welding. When fixing, adhesive may be used instead of tack welding.

The diameter of the head on the upper end side of the pile head level adjusting member 11 is larger than the diameter of the tip side into which it is screwed in, and is sufficiently larger than the inner diameter of the mortar injection hole 14a. Therefore, even if the mortar injection hole 14a of the support plate 14 is located right above the upper end of the pile head level adjusting member 11, the support plate 14 is supported by the upper end of the pile head level adjusting member 11 directly below and sinks. There is no such thing.

As will be described later, the prestressed concrete pile head cap 1 is prevented from moving in the horizontal direction by the pile core adjusting members 17 after the pile core adjustment. However, the pile core adjusting members 17 cannot prevent the prestressed concrete pile head cap 1 from rotating in place. At the construction site, when something hits the prestressed concrete pile head cap 1 held by each pile core adjustment member 17, the pile head cap 1 rotates inside the pile core adjustment member 17 and the The inconvenience that the horizontal direction is changed occurs. By fixing to the pile head level adjusting member 11, the rotation of the pile head cap 1 can be prevented.

The support cylinder 12 is attached to the outer peripheral side of the prestressed concrete pile 6 on the pile head 61 side. The inner diameter of the support cylinder 12 is sufficiently larger than the outer diameter on the pile head 61 side, and there is a gap between the inner diameter and the outer diameter in which the mortar 15 can be sufficiently filled. The support cylinder 12 is formed of a steel cylindrical plate. The support cylinder 12 is fixed to the pile head 61 side of the prestressed concrete pile 6 by the mortar 15 which is hardened on the outer peripheral side on the pile head 61 side.

On the side peripheral surface 12a of the support cylinder 12, steel reinforcing plates 13 are arranged radially from the center of the support cylinder 12 toward the periphery. One vertical end of each reinforcing plate 13 is welded and fixed to the side peripheral surface 12a of the support cylinder 12. Each reinforcing plate 13 has an inverted pyramidal shape in which the protruding length from the side peripheral surface 12a of the support cylinder 12 is expanded upward. Each reinforcing plate 13 reinforces the support plate 14 from the outside to increase its rigidity.

In the figure, for example, the reinforcing plates 13 are arranged radially from the center of the support cylinder 12 in the eight directions at an equal angle of 45 degrees in the circumferential direction, but each reinforcing plate 13 has a protruding length to the outside. It becomes longer and shorter alternately. That is, the reinforcing plate 13 having a long overhanging length is arranged in a cross shape at an equal angle of 90 degrees, and the reinforcing plate 13 having a short overhanging length is displaced in the cross shape at an angle of 45 degrees in the middle of this cross shape arrangement. It is located in.

Each of the reinforcing plates 13 having a long and short projecting length has the same length on the lower end side, but the projecting lengths are different upward. That is, the reinforcing plate 13 having the longer protruding length has a longer protruding length toward the upper side, and the reinforcing plate 13 having the shorter protruding length has a shorter protruding length toward the upper side. The side end of each reinforcing plate 13 on the projecting side is linearly inclined obliquely forward toward the upper side.

A flat plate-shaped support plate 14 is welded and fixed to the upper side of the support cylinder 12 and each of the reinforcing plates 13. The support plate 14 has a function of supporting a load acting through the columns of the building structure and directly transmitting the load to the pile head 61 side of the prestressed concrete pile 6.

The support plate 14 is placed on and supported by the upper ends of a plurality of pile head level adjusting members 11 that are protruded upward from the pile head 61 of the prestressed concrete pile 6 and screwed and mounted, and then injected and hardened. It is fixed to the upper side of the pile head 61 of the prestressed concrete pile 6 by 15. That is, the support plate 14 is mounted and mounted so that the center side thereof covers the pile head 61 side of the prestressed concrete pile 6 from above.

The support plate 14 has, for example, a square shape when viewed from a plane, and the upper end of the reinforcing plate 13 arranged in a cross shape having a longer projecting length is welded to a square diagonal position on the lower surface of the support plate 14 by welding. There is. Further, the upper end of the reinforcing plate 13 arranged in a cross shape having a shorter protruding length is welded to a cross line position connecting midpoints of two opposite sides of the square of the lower surface of the support plate 14.

The length of one side of the support plate 14 having a square shape, for example, located at the upper portion of the prestressed concrete pile head cap 1 is several times the diameter of the circular support cylinder 12 located at the lower portion of the support plate 14, The cap 1 has an inverted pyramid shape that expands upward. The upper support plate 14 is made wider than the lower support cylinder 12 in order to cope with the misalignment of the center axis of the prestressed concrete pile 6 that has been sunk due to manufacturing errors and construction errors of the building structure. Is.

That is, due to manufacturing and construction errors, the central axis of the pillar of the building structure does not match the central axis of the pile head 61 of the prestressed concrete pile 6, and the central axis of the pillar of the building structure is the center of the pile head 61. The shaft is displaced in all directions of 360 degrees from the position of the shaft, but in order to cope with the displacement in any direction of all directions, the support plate 14 on the upper side compared to the support tube 12 on the lower side. Is widened.

A plurality of pile core adjusting members 17 are attached to the side peripheral surface 12a of the support cylinder 12 at equal intervals in the peripheral surface direction. In the drawing, the pile core adjusting members 17 are attached at intervals of 90 degrees in the circumferential direction. Since the tip end side of each pile core adjusting member 17 is inserted into the inside of the support cylinder 12, through holes 12c are formed in the side peripheral surface 12a of the support cylinder 12, respectively.

The pile core adjusting member 17 is formed with a spiral thread on its side peripheral surface so that the insertion length into the pile core adjusting member 17 can be finely adjusted. Further, an engagement hole member 17a is fixedly provided on the outer surface of the side peripheral surface 12a of the support cylinder 12 on the outer side of each through hole 12c. Each engaging hole member 17a is formed with a screw hole that is screwed into the thread of the pile core adjusting member 17. For example, a bolt is used for the pile core adjusting member 17, and a nut is used for the engaging hole member 17a.

Each pile core adjusting member 17 is inserted into the inside of the support cylinder 12 with its tip side penetrating the side peripheral surface 12a of the support cylinder 12, and its tip is the outer peripheral side surface on the pile head 61 side of the internal prestressed concrete pile 6. By abutting against 63, the horizontal movement of the support cylinder 12 is adjusted to adjust the horizontal movement of the support plate 14 fixed to the upper end of the support cylinder 12. That is, the pile core adjusting member 17 can adjust the pile core between the center axis of the pile head 61 of the prestressed concrete pile 6 and the center axis of the prestressed concrete pile head cap 1.

Further, after the adjustment by each pile core adjusting member 17, the side surface 12a of the support cylinder 12 is fixed by each pile core adjusting member 17 with which the tip is in contact, and is prevented from moving in the horizontal direction. As a result, the prestressed concrete pile head cap 1 is prevented from moving in the horizontal direction by the pile core adjusting members 17 after the pile core adjustment.

Around the center of the support plate 14, a plurality of mortar injection holes 14a for injecting the mortar 15 are formed at equal intervals in the circumferential direction. Each mortar injection hole 14a collects between the outside of the prestressed concrete pile 6 on the pile head 61 side and the inside of the support cylinder 12 and the support plate 14 when the mortar 15 is injected from the other mortar injection hole 14a. It also functions as an exhaust hole for the air being discharged.

The mortar 15 is filled and injected into a gap formed between the outer side of the prestressed concrete pile 6 on the pile head 61 side and the inner sides of the support cylinder 12 and the support plate 14 constituting the prestressed concrete pile head cap 1 and cured. After that, the pile head cap 1 including the support cylinder 12 and the support plate 14 is fixed to the outside of the prestressed concrete pile 6 on the side of the pile head 61. For this mortar 15, for example, a non-shrinkable mortar is used.

After that, the base plate at the lower end of the pillar of the building structure (not shown) is connected and fixed to the pile head cap 1 fixed to the pile head 61 side of the prestressed concrete pile 6, for example, an adjustment connection plate is fillet welding or bolts. Fixed by. The pile head cap 1 is located between the base plate at the lower end of the pillar of the building structure and the pile head 61 of the prestressed concrete pile 6 to support the total load of the building structure and to pile the prestressed concrete pile 6. It plays the role of releasing it to the head 61 side.

When the mortar 15 injected into the outer peripheral side surface 63 side of the prestressed concrete pile 6 on the side of the pile head 61 of the prestressed concrete pile 6 has fluidity before being particularly hardened, the mortar receiving plate 16 falls down on the outer peripheral side surface 63 side and flows out. It serves to prevent it from staying and stay on the outer peripheral side surface 63 side of the pile head 61 side.

The mortar support plate 16 is composed of, for example, two semi-circular ring plates, and in a state where the mortar support plate 16 is in close contact with the outer peripheral side surface 63 on the pile head 61 side of the prestressed concrete pile 6 from both sides, the lower end 12b of the support cylinder 12 is Is fixed in the circumferential direction. The mortar 15 acting on the mortar receiving plate 16 is the amount filled in the gap between the inner peripheral side of the support cylinder 12 and the outer peripheral side surface 63 side of the pile head 61 side. Is sufficient, and welding does not take time.

Next, a construction method using the prestressed concrete pile head cap will be described below.
The prestressed concrete pile 6 is sunk in the ground at a predetermined position by using a machine for driving the prestressed concrete pile 6 to a predetermined depth. At this time, the prestressed concrete pile 6 that has been cast and sunk in the ground has its pile head 61 side slightly protruding from the ground. The prestressed concrete pile 6 that has been sunk may not be sunk straight and may be slightly tilted or misaligned depending on the construction condition at the time of placing and the condition of the ground. When the prestressed concrete pile 6 is tilted, the surface of the pile head 61 is not horizontal but tilted.

On the surface of the pile head 61 of the prestressed concrete pile 6 projecting from the ground, a plurality of screw holes 62 used to apply a predetermined compressive force to the prestressed concrete pile 6 are arranged at equal intervals in the circumferential direction, Three pieces are formed in the drawing. The pile head level adjusting members 11 are attached to the plurality of screw holes 62, respectively. Since a spiral screw thread is formed on the side peripheral surface of the pile head level adjusting member 11, it is screwed into the screw hole 62.

The height of the upper end of each mounted pile head level adjusting member 11 can be finely adjusted by a screw movement. When the surface of the pile head 61 of the prestressed concrete pile 6 is tilted, the protrusion height from the surface of the pile head 61 of the pile head level adjusting member 11 on the tilted side is slightly increased, The heights of the plurality of pile head level adjusting members 11 protruding from the surface of the pile head 61 are adjusted to be the same. At this time, the predetermined height of the upper end of each pile head level adjusting member 11 is adjusted in consideration of the plate thickness of the support plate 14 of the prestressed concrete pile head cap 1.

After this, the work of mounting the main body of the prestressed concrete pile head cap 1 is performed. For mounting the main body of the prestressed concrete pile head cap 1, the support cylinder 12 fixed to the lower surface of the support plate 14 constituting the pile head cap 1 is installed from above the pile head 61 of the prestressed concrete pile 6 to the inside thereof. Fit and fit so that The pile head 61 and the outer peripheral side surface 63 thereof are completely settled inside the support cylinder 12 and the support plate 14.

When the prestressed concrete pile head cap 1 is lowered, the prestressed concrete pile heads 6 are screwed to the screw holes 62 of the pile heads 61 of the prestressed concrete piles 6 at the upper ends of the plurality of pile head level adjusting members 11 which are mounted and adjusted to a predetermined height. The lower surface of the support plate 14 forming the pile head cap 1 abuts. As a result, the prestressed concrete pile head cap 1 is supported by the plurality of pile head level adjusting members 11 at a predetermined horizontal level without the upper surface of the support plate 14 tilting. Adjustment can be performed very easily.

After supporting the prestressed concrete pile head cap 1 at a predetermined horizontal level with a plurality of pile head level adjusting members 11 mounted on the pile head 61 of the prestressed concrete pile 6, the pile head 61 of the prestressed concrete pile 6 is supported. The core of the prestressed concrete pile head cap 1 is adjusted with the center of the pile. The pile core is adjusted by using a plurality of pile core adjusting members 17 attached in the circumferential direction of the side peripheral surface 12a of the support cylinder 12 constituting the pile head cap 1.

When it is desired to move the prestressed concrete pile head cap 1 slightly to the left with respect to the pile head 61 of the prestressed concrete pile 6, the pile core adjusting member 17 attached to the right side of the support cylinder 12 is moved in the backward direction. The tip of the pile core adjusting member 17 attached to the left side of the support cylinder 12 is rotated in the forward direction by screwing to rotate the tip of the pile core adjusting member 17 forward. The forward end of the left-hand pile core adjusting member 17 contacts the outer peripheral side surface 63 of the prestressed concrete pile 6 on the pile head 61 side.

When the left pile core adjusting member 17 is further rotated in the forward direction in the abutting state, the left engaging hole member 17a with which the left pile core adjusting member 17 is screwed is moved to the left side by the screw movement. To do. Since the engagement hole member 17a that moves to the left side is fixed to the left side peripheral surface 12a of the support cylinder 12, the support cylinder 12 moves to the left side as a whole. Since the support plate 14 is fixedly mounted on the upper end of the support cylinder 12, the prestressed concrete pile head cap 1 configured by the support cylinder 12 and the support plate 14 also moves to the left. In this way, the prestressed concrete pile head cap 1 can be moved to the left.

After moving the prestressed concrete pile head cap 1 to the left by a predetermined amount, the right pile core adjusting member 17 whose tip has been retracted is rotated in the forward direction to advance the tip by a screw motion. When the tip end of the advanced right pile core adjusting member 17 comes into contact with the outer peripheral side surface 63 of the prestressed concrete pile 6 on the pile head 61 side, the turning is stopped. The pile core adjusting members 17 attached to the left and right sides of the support cylinder 12 of the prestressed concrete pile head cap 1 press down the left and right outer peripheral side surfaces 63 on the pile head 61 side of the prestressed concrete pile 6 from both sides. The stress concrete pile head cap 1 is fixed by preventing the prestressed concrete pile 6 from moving laterally with respect to the pile head 61 side.

In a direction opposite to the above, that is, when it is desired to move the prestressed concrete pile head cap 1 slightly to the right with respect to the pile head 61 of the prestressed concrete pile 6, the pile core attached to the left side of the support cylinder 12 The adjusting member 17 is rotated in the backward direction so that the tip of the adjusting member 17 is retracted by a screw movement, and the pile core adjusting member 17 attached to the right side of the support cylinder 12 is rotated in the forward direction so that the tip thereof is advanced by the screw movement. As a result, the prestressed concrete pile head cap 1 can be moved to the right side. After that, by rotating the left pile core adjusting member 17 in the forward direction and bringing its tip into contact with the outer peripheral side surface 63 of the prestressed concrete pile 6 on the pile head 61 side, the prestressed concrete pile head cap 1 is prestressed concrete. The lateral movement of the pile 6 with respect to the pile head 61 side is blocked and fixed.

Further, when it is desired to move the prestressed concrete pile head cap 1 a little to the front side with respect to the pile head 61 of the prestressed concrete pile 6, the pile core adjusting member 17 attached to the rear side of the support cylinder 12 is used. Is rotated in the backward direction to move its tip backward by a screw motion, and the pile core adjusting member 17 attached to the front side of the support cylinder 12 is turned in a forward direction to move the tip forward by a screw motion. Thereby, the prestressed concrete pile head cap 1 can be moved to the front side. After that, by rotating the pile core adjusting member 17 on the rear side in the forward direction and bringing its tip into contact with the outer peripheral side surface 63 on the pile head 61 side of the prestressed concrete pile 6, the prestressed concrete pile head cap 1 is prestressed. Movement of the concrete pile 6 in the front-rear direction is blocked and fixed to the pile head 61 side.

When the prestressed concrete pile head cap 1 is to be moved slightly rearward with respect to the pile head 61 of the prestressed concrete pile 6 in the opposite direction to the above, for example, the pile attached to the front side of the support cylinder 12 The core adjusting member 17 is rotated in the backward direction to move its tip backward by a screw motion, and the pile core adjusting member 17 attached to the rear side of the support cylinder 12 is rotated in the forward direction to move its tip forward by a screw motion. Thereby, the prestressed concrete pile head cap 1 can be moved to the rear side. After that, by rotating the front pile core adjusting member 17 in the forward direction and bringing the tip thereof into contact with the outer peripheral side surface 63 of the prestressed concrete pile 6 on the pile head 61 side, the prestressed concrete pile head cap 1 is prestressed concrete. Movement of the pile 6 in the front-rear direction is blocked and fixed to the pile head 61 side.

After the pile cores of the center axis of the pile head 61 of the prestressed concrete pile 6 and the center axis of the prestressed concrete pile head cap 1 are adjusted by the above work, the prestressed concrete pile head cap 1 is Using the mortar injection hole 14a formed in the support plate 14 so as not to rotate at the position, the upper end of the pile head level adjusting member 11 at a position facing one of the plurality of mortar injection holes 14a is tack welded. Thus, the support plate 14 is fixed to the inner peripheral surface of the mortar injection hole 14a, and the support plate 14 is fixed to one pile head level adjusting member 11. Thus, it is possible to prevent the prestressed concrete pile head cap 1 from rotating even if something hits it through the fixed support plate 14.

After fixing the prestressed concrete pile head cap 1 to the pile head 61 of the prestressed concrete pile 6 via the pile head level adjusting member 11, the support cylinder 12 is accurately centered without shifting to the outer peripheral side of the pile tip side 63. Be attached to. The mortar receiving plate 16 divided into two semicircular ring plates is attached to the lower end 12b of the support cylinder 12 by sandwiching the outer peripheral side surfaces 63 on the pile head 61 side of the prestressed concrete pile 6 from both sides, and fixed by temporary welding. ..

After that, through the mortar injection hole 14a of the support plate 14, into the gap between the outer side of the prestressed concrete pile 6 on the pile head 61 side and the support cylinder 12 of the prestressed concrete pile head cap 1 and the inner side of the support plate 14. Inject mortar 15. When the injected mortar 15 is sufficiently filled in the gap between the outside on the pile head 61 side and the inside of the support cylinder 12 and the support plate 14, a part of the injected mortar 15 leaks from the mortar injection hole 14a. Check this and stop the infusion as it starts.

The injected mortar 15 is received by the mortar receiving plate 16 and is prevented from falling and flowing out on the outer peripheral side of the prestressed concrete pile 6 on the pile head 61 side. When the injected mortar 15 hardens between the outer side of the pile head 61 side and the inner side of the support cylinder 12 and the support plate 14, the prestressed concrete pile head cap 1 is acted on by the mortar 15 after hardening to prestress the concrete pile. 6 is fixed to the side of the pile head 61.

After fixing to the upper side of the pile head 61 of the prestressed concrete pile 6 with the hardened mortar 15, on the support plate 14 of the prestressed concrete pile head cap 1, for example, the lower end of the pillar of the building structure is attached, Each column of the building structure is supported on the pile head 61 side of each prestressed concrete pile 6 via the prestressed concrete pile head cap 1.

It should be noted that the present invention is not limited to the embodiments for carrying out the above invention, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Prestressed concrete pile head cap 11 Pile head level adjusting member 12 Support cylinder 12a Side peripheral surface 12b Lower end 12c Through hole 13 Reinforcing plate 14 Support plate 14a Mortar injection hole 15 Mortar 16 Mortar receiving plate 17 Pile core adjusting member 17a Engagement hole Member 18 Slide adjustment plate 6 Prestressed concrete pile 61 Pile head 62 Screw hole 63 Outer peripheral side

Claims (5)

A plurality of pre-stressed concrete piles that are placed in the ground and whose heads protrude from the ground A pile head level adjusting member, a support cylinder mounted on the outer peripheral side of the pile head side of the prestressed concrete pile, and a plurality of the above pile head levels fixed to the upper end of the support cylinder and mounted on the pile head of the prestressed concrete pile A support plate in the shape of a flat plate placed and supported on the upper end of the adjusting member, and a support cylinder after being injected into the gap between the outside of the pile head side of the prestressed concrete pile and the inside of the support cylinder and the support plate, and then cured. And a mortar for fixing the support plate to the pile head side of the prestressed concrete pile, a plurality of mortar injection holes for injecting the mortar formed around the center of the support plate, and fixedly supported at the lower end of the support cylinder. The prestressed concrete pile is provided with a mortar receiving plate that prevents the mortar before hardening injected between the inner peripheral side of the cylinder and the outer peripheral side of the pile head side of the prestressed concrete pile from falling and flowing out. Even if the surface of the pile head is not level when it is placed at an angle, the height of each pile head level adjustment member screwed into the multiple screw holes formed in the pile head of the prestressed concrete pile in the circumferential direction. A prestressed concrete pile head cap characterized by being adjusted to easily adjust the upper end of each pile head level adjusting member to a horizontal flat state. A plurality of pre-stressed concrete piles that are placed in the ground and whose heads protrude from the ground Pile head level adjusting member, support cylinder mounted on the outer peripheral side of the pile head side of the prestressed concrete pile, reinforcing plate attached to the outer peripheral side of the support cylinder and expanding upward, fixed to the upper end of the support cylinder And a support plate in the form of a flat plate mounted on and supported by the upper ends of the plurality of pile head level adjusting members reinforced and supported by a reinforcing plate and mounted on the pile head of the prestressed concrete pile, and a pile of the prestressed concrete pile Mortar that is injected into the gap between the outside of the head side and the inside of the support tube and support plate to fix the support tube and support plate to the pile head side of the prestressed concrete pile after hardening, and forms around the center of the support plate Before hardening, a plurality of mortar injection holes for injecting the prepared mortar and injected between the inner peripheral side of the support cylinder fixed to the lower end of the support cylinder and the outer peripheral side of the pile head side of the prestressed concrete pile Mortar receiving plate that prevents the mortar from falling and flowing out, and a slide adjusting plate that is slidably mounted on the upper surface of the supporting plate. Even if the surface of the pile is not horizontal, adjust the height of each pile head level adjustment member that is screwed into the multiple screw holes formed in the pile head of the prestressed concrete pile in the circumferential direction to adjust each pile head level. A prestressed concrete pile head cap characterized by easily adjusting the upper end of the member to a horizontal plane. A plurality of pre-stressed concrete piles that are placed in the ground and whose heads protrude from the ground A pile head level adjusting member, a support cylinder attached to the outer peripheral side of the prestressed concrete pile on the pile head side, and a plurality of pile head level adjusting members fixed to the upper end of the support cylinder and attached to the pile head of the prestressed concrete pile The support plate in the shape of a flat plate placed and supported on the upper end of the support pipe and the support pipe and the support after being injected into the gap between the outside of the pile head side of the prestressed concrete pile and the inside of the support pipe and the support plate Mortar to fix the plate to the pile head side of the prestressed concrete pile, multiple mortar injection holes for injecting mortar formed around the center of the support plate, and the mortar fixed at the lower end of the support cylinder. Mortar receiving plate that prevents the mortar before hardening that has been injected between the inner peripheral side and the outer peripheral side of the pile head side of the prestressed concrete pile from falling and flowing out, and the peripheral surface direction of the side peripheral surface of the support cylinder A plurality of cores are attached to each of the support cylinders and screwed through the side peripheral surface of the support cylinder so that the tips of the screws contact the outer peripheral side surface of the internal prestressed concrete pile on the pile head side to adjust the horizontal movement of the support cylinder. Even if the prestressed concrete pile is installed by tilting and the surface of the pile head is not horizontal, it is screwed into multiple screw holes formed in the pile head of the prestressed concrete pile in the circumferential direction. A prestressed concrete pile head cap, characterized in that the height of each pile head level adjusting member is adjusted to easily adjust the upper end of each pile head level adjusting member to a horizontal plane state. A plurality of pre-stressed concrete piles that are placed in the ground and whose heads protrude from the ground A pile head level adjusting member, a reinforcing plate which is attached to the outer peripheral side of the support cylinder and expands upward, and a plurality of which are fixed to the upper end of the support cylinder and reinforced and supported by the reinforcing plate and mounted on the pile head of the prestressed concrete pile. The flat plate-shaped support plate placed and supported on the upper end of the pile head level adjusting member of the above, and injected into the gap between the outside of the pile head side of the prestressed concrete pile and the inside of the support cylinder and the support plate. Mortar for fixing the support cylinder and the support plate to the pile head side of the prestressed concrete pile after hardening, a plurality of mortar injection holes for injecting the mortar formed around the center of the support plate, and the lower end of the support cylinder. The mortar receiving plate that prevents the mortar before hardening, which is fixed between the inner peripheral side of the support cylinder and the outer peripheral side of the pile head side of the prestressed concrete pile, from falling and flowing out, and the side of the support cylinder. Multiple attachments in the peripheral direction of the peripheral surface and screwing through the side peripheral surface of the support cylinder, the tip of which is brought into contact with the outer peripheral surface on the pile head side of the internal prestressed concrete pile and the horizontal movement of the support cylinder And a pile core adjusting member for adjusting the prestressed concrete pile, the pile head of the prestressed concrete pile is formed in a circumferential direction even if the prestressed concrete pile is placed obliquely and the surface of the pile head is not horizontal. Prestressed concrete pile head cap, characterized in that the height of each pile head level adjusting member screwed into the screw hole of the above is adjusted to easily adjust the upper end of each pile head level adjusting member to a horizontal plane state. .. The prestressed concrete pile head cap according to any one of claims 1 to 4, wherein the support plate is fixed to a part of the pile head level adjusting member through a mortar injection hole.

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