JP3437388B2 - Joint pile - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is formed at an installation site.
Frame for upper pile and frame for lower pile
After inserting, pour concrete into the installation hole of the pile
The present invention relates to a joint pile which is a cast-in-place pile that is formed by hardening by curing .

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 7-189246, a circumferential groove having a width wider than the total thickness of end plates attached to the lower end of the upper pile and the upper end of the lower pile is used. An inner ring that has an inner surface and is divided into a plurality of parts in the circumferential direction that has an outer surface taper in the pile longitudinal direction, and an outer ring that has an inner surface taper that is fitted onto the outer surface taper and tightens the inner ring. Accordingly, there is known a joint pile in which an elastic material is interposed between the end plate and the circumferential groove.

In the joint pile, the inner ring externally fitted to the end plates of the upper and lower piles is pressed against the outer peripheral surface of the end plate by the outer ring, so that the friction due to the pressing force acting between the end plate and the inner ring. Since the upper and lower piles are connected according to the force, both piles can be connected without welding the end plate of the upper pile and the end plate of the lower pile. In addition, when a bending force acts on the connection part of both piles due to the liquefaction phenomenon of the ground caused by an earthquake, etc., it is formed between the end plate and the inner ring while opposing this bending force. The joint pile is allowed to bend and displace at the connection portion by an amount corresponding to the gap in the pile longitudinal direction of the recessed portion, and it is possible to prevent the pile from being broken.

[0004]

SUMMARY OF THE INVENTION In the pile joint structure described in the above publication, the tapered surfaces formed on the outer surface of the inner ring and the inner surface of the outer ring are used to move the inner ring to the end plate side with a large force. Since it is configured to be pressed, it is necessary to precisely process and finish both tapered surfaces so that both piles can be connected in an appropriate state, and there is a problem that the manufacturing cost increases. In addition, since the outer ring is fitted onto the inner ring and the outer ring is pressed in the longitudinal direction of the pile, the complicated work of tightening the inner ring by the tapered surface of the inner ring is required. There is a problem that it is difficult to apply the above joint structure to a cast-in-place pile that forms a joint pile at the construction site.

Further, since the outer ring is externally fitted to the inner ring by pressing the outer ring in the longitudinal direction of the pile by using a tool such as a jack, the outer ring is separated from the outer peripheral surface of the pile body. Must also be projected outward, and when inserting the joint pile into the installation hole formed in the ground, so that the outer ring can be inserted into the installation hole,
It is necessary to make the inner diameter of the installation hole larger than the outer diameter of the pile body, and when the joint pile is driven into the ground for installation, a punched hole having the inner diameter corresponding to the outer ring is formed in the ground. It will be. Therefore, in the installed state of the joint pile, it is unavoidable that a gap is formed between the installation hole or the punched hole and the pile body, and it is difficult to bring the pile and the ground into close contact with each other. There is a problem that an appropriate supporting force cannot be obtained according to the frictional force acting between the two.

[0006] The present invention has been made in view of such circumstances, the installation current
In the installation hole of the pile formed in the field, the frame material for the upper pile and the lower portion
After inserting the pile frame member, concrete is installed in the installation hole of the pile.
Casting formed by pouring and curing
In a joint pile consisting of piles, the frame material for the upper pile and the lower pile
The upper pile with a simple structure without protruding the member used for connection with the frame pile structure member outside the outer peripheral surface of the pile body.
The frame members for the lower pile and the frame members for the lower pile can be easily and longitudinally
It is intended to provide a joint pile which is properly connected .

[0007]

The invention according to claim 1 is
In the installation holes of the piles formed at the installation site, the frame members for the upper piles and
And the lower pile skeleton, and then insert into the installation holes of the above piles.
The current formed by injecting cleats and curing
In a joint pile consisting of cast-in-place piles, a frame for the upper pile
Of the upper end plate provided at the lower end of the member , the lower end plate provided at the upper end of the lower pile frame member , the upper elastic body installed on the upper surface of the outer peripheral portion of the upper end plate, and the lower end plate A lower elastic body installed on the lower surface of the outer peripheral portion, and a connecting member having a pair of locking plates for connecting the upper end plate and the lower end plate by sandwiching the upper elastic body and the lower elastic body from above and below. A first covering member having an L-shaped cross section fixed to the upper surface of the upper end plate so as to cover the inner peripheral surface and the upper surface of the upper elastic body, and the inner peripheral surface and the lower surface of the lower elastic body. And a second covering member having an L-shaped cross section fixed to the lower surface of the lower end plate, the connecting member is divided into a plurality of pieces in the circumferential direction of the joint pile, and the upper end plate and the lower end plate are the movement restricting portion for restricting the movement of relative lateral provided, framing member and the lower for the upper pile Without protruding outward from the outer peripheral surface of the pile body member for connecting the piles for the framework material, which fitted the connecting member to the joint between the upper end plate and the lower end plate
The upper pile frame member and the lower pile frame member are
Which are connected to the length Direction.

According to the above construction, by installing a plurality of connecting members at the connecting portion between the upper pile frame member and the lower pile frame member , the upper elastic body and the lower elastic body are provided between the pair of upper and lower locking plates. With the body interposed, the inner peripheral surface portion and the upper surface portion of the upper elastic body and the inner peripheral surface portion and the lower surface portion of the lower elastic body are covered by the first and second coating members having an L-shaped cross section. The upper end plate and the lower end plate are connected to each other by the connecting member. When a bending load or the like is applied to the connection portion of the joint pile including the upper pile and the lower pile, the upper elastic body and the lower elastic body are elastically deformed, so that the joint pile is deformed at the connection portion. When the bending load or the like is absorbed and the shearing load acts on the connecting portion, the movement restricting portion restricts relative lateral movement of the upper end plate and the lower end plate, and the shearing force is reduced. The load will be supported.

[0009] The invention according to claim 2 is the joint pile according to the first aspect, the lower portion of the upper pile for framing member, the movement restricting portion by connecting reinforcing bar connecting the upper portion of the lower pile for framing material It is composed.

According to the above construction, the lower portion of the frame member for the upper pile and the lower pile by the movement restricting portion composed of the connecting reinforcing bars.
When the shear load acts on the connecting portion between the upper pile and the lower pile by connecting the upper part of the frame member for construction , the relative lateral movement of the upper end plate and the lower end plate is restricted, and Shear loads will be supported.

According to a third aspect of the present invention, in the joint pile according to the first or second aspect, the lower part of the frame member for the upper pile is
Upper end plate provided at the end or upper end of frame member for lower pile
The movement restricting portion is configured by a protrusion protruding from one side of the lower end plate provided on the other side.

According to the above construction, when a shearing load is applied to the connecting portion between the upper pile and the lower pile, the protrusion comes into contact with the other end plate so that the upper end plate and the lower end plate are opposed to each other. The lateral movement is regulated to support the shear load.

The invention according to claim 4 is the above-mentioned claims 1 to 3.
In the joint pile according to any one of 1 to 3, the movement restricting portion is configured by a ring body that is fitted onto the connecting member and restricts lateral movement thereof.

According to the above construction, the movement restricting portion composed of the ring body restrains the outer peripheral surface of each connecting member, so that when a shear load acts on the connecting portion between the upper pile and the lower pile, the upper portion Relative lateral movement of the end plate and the lower end plate is restricted to support the shear load.

The invention according to claim 5 is formed at an installation site.
Frame for upper pile and frame for lower pile
After inserting, pour concrete into the installation hole of the pile
In a joint pile consisting of cast-in-place piles that are formed by hardening by curing, an upper end plate provided at the lower end of the upper pile frame member and an upper end of the lower pile frame member Lower end plate, upper elastic body installed on upper surface of outer peripheral portion of upper end plate, lower elastic body installed on lower surface of outer peripheral portion of lower end plate, and locking plate pressed against upper surface of the upper elastic body. On the upper surface of the upper end plate so as to cover the inner peripheral surface and the upper surface of the upper elastic body. A fixed first covering member having an L-shaped section, and a second covering member having an L-shaped section fixed to the lower surface of the lower end plate so as to cover the inner peripheral surface portion and the lower surface portion of the lower elastic body. , Above upper pile
Without protruding outward from the member for connecting the use framing member and the lower pile for framing member outer peripheral surface of the pile body, the upper end attached integrally with the first connecting member and the second connecting member By connecting the plate and the lower end plate, the frame for the upper pile and the lower part
It is connected with the frame member for piles in the length direction .

According to the above structure, the first connecting member and the second connecting member are installed at the connecting portion between the upper pile frame member and the lower pile frame member, and the two connecting members are integrally connected, An upper elastic body and a lower elastic body are interposed between the pair of locking plates, and an inner peripheral surface portion and an upper surface portion of the upper elastic body and an inner peripheral surface portion and a lower surface portion of the lower elastic body have an L-shaped cross section. The upper end plate and the lower end plate covered with the first and second covering members are connected to each other by the first connecting member and the second connecting member. Then, when a bending load or the like is applied to the connection portion of the joint pile including the upper pile and the lower pile, the joint pile is bent at the connection portion by elastically deforming the upper elastic body and the lower elastic body. When the bending load or the like is allowed to be absorbed and the shearing load acts on the connecting portion, the relative relative of the upper end plate and the lower end plate is caused by the first connecting member and the second connecting member. The lateral movement is restricted and the shear load is supported.

The invention according to claim 6 is the above claims 1 to 5.
In joint pile according to any one of the bone for the upper pile
Of the upper end plate provided at the lower end of the assembly and the frame assembly for the lower pile
An intermediate elastic body is arranged between the lower end plate provided at the upper end.

According to the above structure, the upper elastic body and the lower elastic body are interposed between the locking plates of the connecting member, and the intermediate elastic body is interposed between the upper end plate and the lower end plate. The upper end plate and the lower end plate are connected to each other by the connecting member. Then, when a bending load or the like is applied to the connection portion of the joint pile composed of the upper pile and the lower pile, the upper elastic body and the lower elastic body and the intermediate elastic body are elastically deformed, so that the connecting portion is formed. The deformation of the joint pile is effectively allowed at.

[0019]

1 and 2 show an embodiment of a joint pile according to the present invention. This joint pile connects the upper pile 2 having the upper end plate 1 at the lower end, the lower pile 4 having the lower end plate 3 at the upper end, and the upper end plate 1 and the lower end plate 3 described above. Connecting member 5, an upper elastic body 6 installed on the upper surface of the outer peripheral portion of the upper end plate 1, and a lower elastic body 7 installed on the lower surface of the outer peripheral portion of the lower end plate 3, And the lower pile 4 are configured to be connected in the length direction thereof.

The upper surface of the upper end plate 1 is prestressed.
The lower end of the upper pile frame member 8 made of reinforcing steel and the base end of the first covering member 9 having an L-shaped cross section that covers the inner peripheral surface and the upper surface of the upper elastic body 6 are welded or the like. It is fixed at. In addition, the lower end plate 3 has a lower surface for prestressing.
The lower end portion of the lower pile frame member 10 made of a reinforcing bar and the base end portion of the second covering member 11 having an L-shaped cross section that covers the inner peripheral surface portion and the lower surface portion of the lower elastic body 7 are welded or the like. It is fixed.

The connecting member 5 is a member having a U-shaped cross section which is divided into four pieces in the circumferential direction of the joint pile, and is externally fitted to the joint portion of the upper end plate 1 and the lower end plate 3, respectively. As a result, the upper pile frame member 8 and the lower pile frame member 1
The upper elastic body 6 and the lower elastic body 7 installed at the connection portion with 0 are sandwiched from above and below. That is, the connecting member 5 includes a pair of upper and lower locking plates 12 and 13 which are pressed against the upper surface of the upper elastic body 6 and the lower surface of the lower elastic body 7, respectively, and the outer peripheral portions of the locking plates 12 and 13. The upper elastic body 6 having an outer surface plate 14 connected to each other.
The lower elastic body 7 is sandwiched from above and below so that the two end plates 1 and 3 are connected to each other.

The upper elastic body 6 and the lower elastic body 7 are
The elastic material such as synthetic rubber is installed between the upper locking plate 12 and the lower locking plate 13 of the connecting member 5 and the upper end plate 1 and the lower end plate 3 in a compressed state. The thickness is set so that The upper elastic body 6 and the lower elastic body 7 are connected to each other by the connecting member 5
The upper locking plate 12 and the lower locking plate 13 are temporarily locked by being bonded to the upper surface of the upper locking plate 12 and the lower surface of the lower locking plate 13.

To install the joint stake of the above construction,
The upper end plate 1 of the upper pile 2 to which the upper pile frame member 8 and the first covering member 9 are fixed, and the lower end plate of the lower pile 4 to which the lower pile frame member 10 and the first covering member 11 are fixed. in a state in which 3 and superposed, the coupling member 5 that the upper elastic member 6 and the lower elastic member 7 is temporarily fixed, as well as fitted to the joint between the upper end plate 1 and the lower end plate 3, the connecting By installing the reinforcing bar 15 for the lower part of the frame member 8 for the upper pile
And the upper part of the lower pile frame member 10 are connected.

Then, in the installation hole of the pile formed at the installation site of the joint pile, the frame member 8 for the upper pile and the lower pile are formed.
After the framework member 10 is inserted, the concrete material is injected into the installation hole of the pile and hardened, whereby the upper end plate 1 and the lower end plate 3 are connected by the connecting member 5, and Upper surface of outer peripheral portion of end plate 1 and lower end plate 3
Thus, a joint pile is formed in which the upper elastic body 6 and the lower elastic body 7 are respectively installed on the lower surface of the outer peripheral portion.

In the joint pile constructed so that the upper pile 2 and the lower pile 4 are connected in the lengthwise direction as described above, the upper end plate 1 provided at the lower end of the upper pile frame member 8 While installing the upper elastic body 6 on the upper surface of the outer peripheral part of
A pair of engaging members for mounting the lower elastic body 7 on the lower surface of the outer peripheral portion of the lower end plate 3 provided at the upper end of the lower pile frame member 10 and sandwiching the upper elastic body 6 and the lower elastic body 7 from above and below. Since the connecting member 5 having the stop plates 12 and 13 is divided into a plurality of pieces in the circumferential direction of the joint pile, the upper pile frame member 8 and the lower pile structure
The connecting member 5 described above is used without connecting the member used for connection with the frame member 10 for the partial pile to the outside of the outer peripheral surface of the pile main body.
Is externally fitted to the joint portion between the upper end plate 1 and the lower end plate 3, so that the upper elastic body 6 and the lower elastic body 7 are interposed between the pair of locking plates 12 and 13. Both end plates 1 and 3 can be easily and properly connected by the connecting member 5.

That is, since the upper elastic body 6 and the lower elastic body 7 are arranged between the upper end plate 1 and the lower end plate 3 and the locking plates 12 and 13 of the connecting member 5, respectively, the upper member is engaged. Even if there is some manufacturing error in the installation distance between the stop plate 12 and the lower locking plate 13, the above manufacturing error is absorbed by elastically deforming the upper elastic body 6 and the lower elastic body 7, and both end plates It is possible to sandwich and connect 1 and 3 in an appropriate state. Moreover, as in the prior art, since both end plates 1 and 3 can be connected without using a tool such as a jack, the upper pile frame member 8 and the lower pile bone member 8 can be connected.
It is possible to prevent a member used for connection with the assembly member 10 , that is, the connecting member 5 and the like from projecting outward from the outer peripheral surface of the pile main body made of a concrete material.

Therefore, the static load or the like acting in the axial direction of the joint pile can be properly supported by the upper pile 2 and the lower pile 4, and a liquefaction phenomenon or the like occurs due to an earthquake, and 2 or the ground on which the lower pile 4 is installed partially moves laterally and a large bending load is applied to the connection portion of both piles 2 and 4, and lateral and vertical vibrations corresponding to the rolling and pitching of an earthquake. When a load or the like is applied, by elastically deforming the upper elastic body 6 and the lower elastic body 7, the connecting portion of the joint pile can be deformed following the ground fluctuation and the like. It is possible to prevent the joint pile from being broken by being absorbed.

Since the upper end plate 1 and the lower end plate 3 can be connected to each other without projecting the connecting member 5 and the like outwardly from the outer peripheral surface of the pile main body, the joint pile is installed. In, the pile can be installed in a state in which the pile is in close contact with the ground without forming a gap between the installation hole of the pile formed in the ground and the pile main body, and thus, between the pile and the ground. A sufficient frictional force can be applied to stably support the joint pile.

Further, by installing a movement restricting portion comprising a connecting rebar 15 for connecting the lower portion of the upper pile frame member 8 and the upper portion of the lower pile frame member 10 to each other , the above-mentioned upper portion is provided. Since the end plate 1 and the lower end plate 3 are configured to be restricted from laterally moving relative to each other, the connecting portion of the piles 2 and 4 can be effectively reinforced by the connecting reinforcing bar 15. When a shear load is applied to the connecting portion between the two piles 2 and 4, it is possible to reliably prevent the situation where the connecting portion between the two piles 2 and 4 shifts to the left and right and the connecting member 5 comes off. it can.

As described above, the first covering member 9 covers the inner peripheral surface and the upper surface of the upper elastic body 6, and the second covering member 11 covers the inner peripheral surface and the lower surface of the lower elastic body 7. Since the concrete material is poured into the installation hole of the pile to form the main body of the joint pile, the concrete material is allowed to flow into the installation portion of the upper elastic body 6 and the lower elastic body 7. It can be prevented by the first and second coating materials 9 and 10. Therefore, it is possible to effectively prevent a situation in which the elasticity of the upper elastic body 6 and the lower elastic body 7 is lost due to the surroundings of the upper elastic body 6 and the lower elastic body 7 being solidified with a concrete material.

In the above embodiment, the connecting reinforcing bar 15 is used.
Although the example in which the movement restricting portion made of is provided has been described, as shown in FIG. 3, the movement restricting portion made of the protrusion 16 protruding upward from the inner peripheral portion of the lower end plate 1 is used as the connecting reinforcing bar 15 described above.
It is also possible to provide the structure together with, or instead of the movement restricting portion made of the connecting reinforcing bar 15, a movement restricting portion made of the protrusion 16 is provided.

According to the above construction, when a shearing load is applied to the connecting portion between the upper pile 2 and the lower pile 4, the protrusion 16 is brought into contact with the inner peripheral surface of the upper end plate 3 so that the upper end plate 3 is brought into contact. By controlling the relative lateral movement of the lower end plate 1 and the lower end plate 3, the shear load can be effectively supported with a simple configuration. It should be noted that the upper end plate 1 may be provided with a projecting portion projecting downward from the inner peripheral portion, or the outer end portion of the upper end plate 1 or the lower end plate 3 may be provided with a projecting portion constituting the movement restricting portion. It is also possible to have a projecting structure.

Further, as shown in FIG. 4, the connecting member 5 is
A movement restricting portion including a ring body 17 is externally fitted to the upper end plate 1 and the lower end plate 3 are relatively laterally arranged by restraining the outer peripheral portion of each connecting member 5 by the ring body 17. It may be configured to restrict movement.

Further, as shown in FIG. 5, a frame member for the upper pile
Upper end plate 1 provided at the lower end of 8 and frame member for lower pile
A structure in which an intermediate elastic body 18 made of a synthetic rubber plate material or the like is disposed between the lower end plate 3 provided at the upper end portion of 10 and the lower end plate 3. With such a configuration, when a load is applied in the direction in which the connecting portion between the upper pile 2 and the lower pile 4 is bent, the upper elastic body 6 and the lower elastic body 7,
Since the intermediate elastic body 18 and the intermediate elastic body 18 can be elastically deformed, the deformation of the joint pile at the connection portion is more effectively allowed.

In the above embodiment, an example in which the connecting member 5 is divided into a plurality of pieces in the circumferential direction of the joint pile has been described. However, as shown in FIG. 6 or 7, the connecting member 5 is pressed against the upper surface of the upper elastic body 6. A first connecting member 19 having a donut disc-shaped locking plate 12 and a second coupling member 20 having a donut disc-shaped locking plate 13 and side plates 14 that are pressed against the lower surface of the lower elastic body 7, By integrally connecting the first connecting member 19 and the second connecting member 20 by means such as welding or bolting, the upper end plate 1 and the lower end plate are connected via the upper elastic body 6 and the lower elastic body 7. 3 may be connected. In the case of such a configuration, the upper end plate 1 and the lower end plate 3 are provided without providing the movement restricting member.
It is possible to prevent the and from moving relatively sideways.

Further , as shown in FIG. 8, insertion holes 22 and 23 of the prestressing rebar 21 are formed at corresponding positions in the lower end plate 1 of the upper pile 2 and the upper end plate 3 of the lower pile 4, respectively. Then, in a state where the prestressing rebar 21 is installed so as to straddle the installation portions of the upper pile 2 and the lower pile 4, by injecting concrete material into a formwork (not shown), a concrete joint pile is formed. You can make it
Yes . In this case, the prestressing reinforcing bar 21 can prevent the upper end plate 1 and the lower end plate 3 from relatively moving laterally.

Furthermore, the present invention is not limited to concrete piles, but can also be applied to steel pipe piles or composite piles in which a steel pipe is filled with concrete material, or piles combining these.

[0038]

As described above, according to the invention of claim 1, the framework for the upper pile is installed in the installation hole of the pile formed at the installation site.
Installation holes for the above piles after inserting the timber and frame material for the lower pile
It is formed by pouring concrete into and hardening it.
In the joint pile consisting of cast-in-place piles , the upper pile
An upper end plate provided at the lower end of the use scaffold materials, bone for the lower pile
The lower end plate provided on the upper end of the assembly, the upper elastic body installed on the outer peripheral upper surface of the upper end plate, the lower elastic body installed on the outer peripheral lower surface of the lower end plate, and the upper elastic body of these A connecting member having a pair of locking plates for connecting the upper end plate and the lower end plate by sandwiching the body and the lower elastic body from above and below, and covering the inner peripheral surface portion and the upper surface portion of the upper elastic body. A first covering member having an L-shaped section fixed to the upper surface of the upper end plate, and a first covering member having an L-shaped section fixed to the lower surface of the lower end plate so as to cover the inner peripheral surface portion and the lower surface portion of the lower elastic body. Two
A cover member is provided, the connecting member is divided into a plurality in the circumferential direction of the joint pile, and a movement restricting portion that restricts relative lateral movement of the upper end plate and the lower end plate is provided,
Without connecting the member for connecting the upper pile frame member and the lower pile frame member to the outside from the outer peripheral surface of the pile body, the connecting member at the joint between the upper end plate and the lower end plate. By fitting on the outer pile, the upper pile frame member and the lower pile frame member can be
Since it is connected in the length direction, it is possible to effectively prevent the joint piles from being broken when the ground liquefaction phenomenon occurs due to the earthquake or when the vibration load due to the earthquake acts, and at the same time, When a shear load is applied to the connecting portion between the pile and the lower pile, there is an advantage that it is possible to reliably prevent the connecting member of both piles from shifting to the left and right and the connecting member from coming off. Moreover, when the concrete material is poured into the installation hole of the pile or the frame for forming the pile to form the concrete joint pile, the concrete material flows into the installation portion of the upper elastic body and the lower elastic body. Can be prevented by the first and second covering members,
There is an advantage that it is possible to effectively prevent the occurrence of a situation in which the elasticity of the upper elastic body and the lower elastic body is lost due to the surroundings of the upper elastic body and the lower elastic body being solidified with a concrete material.

The invention according to claim 2 is the bone for the upper pile .
Since the above-mentioned movement restricting portion is constituted by the connecting reinforcing bar connecting the lower portion of the assembly member and the upper portion of the lower pile frame member , the connecting portion between the upper pile and the lower pile can be effectively reinforced by this connecting reinforcing bar. In addition, it is possible to reliably prevent the connecting member of the two piles from slipping to the left and right and the connecting member from coming off when the shear load is applied to the connecting portion of the upper pile and the lower pile by the connecting reinforcing bar. it can.

The invention according to claim 3 is the bone for an upper pile .
Upper end plate or lower pile skeleton provided at the lower end of the assembly
Since the above-mentioned movement restricting portion is constituted by a protrusion protruding from one side of the lower end plate provided at the upper end of the material to the other side,
When a shear load is applied to the connecting portion between the upper pile and the lower pile with a simple structure, there is an advantage that it is possible to surely prevent the connecting member of the both piles from shifting to the left and right and the connecting member from coming off by the protrusion. is there.

Further, in the invention according to claim 4, since the movement restricting portion is constituted by the ring body which is fitted on the connecting member to restrict the lateral movement thereof, each connection is made by the movement restricting portion formed of the ring body. By constraining the outer peripheral surface of the member, when a shear load acts on the connecting portion between the upper pile and the lower pile, the relative lateral movement of the upper end plate and the lower end plate is regulated to reduce the shear load. Can be effectively supported.

In addition, the invention according to claim 5 is the installation site.
For formed pile installation holes, for upper pile frame material and lower pile
After inserting the frame members, put concrete in the installation holes of the piles.
Is it a cast-in-place pile formed by pouring and hardening?
In Ranaru joint piles, an upper end plate provided at the lower end of the upper pile for framing member, and a lower end plate provided on the upper end of the lower pile for framing material is disposed on the outer peripheral portion upper surface of the upper end plate An upper elastic body, a lower elastic body installed on a lower surface of an outer peripheral portion of the lower end plate, a first connecting member having a locking plate press-contacted to an upper surface of the upper elastic body, and a lower surface of the lower elastic body. A second connecting member having a locking plate that is press-contacted; a first covering member having an L-shaped cross section fixed to the upper surface of the upper end plate so as to cover the inner peripheral surface portion and the upper surface portion of the upper elastic body; A second covering member having an L-shaped cross section, which is fixed to the lower surface of the lower end plate so as to cover the inner peripheral surface portion and the lower surface portion of the lower elastic body, and comprises the above-mentioned upper pile frame member and lower pile frame member . The first connecting member and the second connecting member can be connected to each other without causing the connecting member to project outward from the outer peripheral surface of the pile main body. And a binding member linked together by connecting the upper end plate and the lower end plate, the bone assembly materials for the upper pile
Since the lower pile frame and the lower pile frame are connected in the length direction, it is effective to prevent the joint pile from being broken when a liquefaction phenomenon occurs due to an earthquake or when a vibration load due to an earthquake is applied. In addition to the above, there is an advantage in that, when a shear load is applied to the connecting portion between the upper pile and the lower pile, the connecting portions of both piles can be effectively prevented from shifting to the left and right with a simple configuration. Moreover, when the concrete material is poured into the installation hole of the pile or the frame for forming the pile to form the concrete joint pile, the concrete material flows into the installation portion of the upper elastic body and the lower elastic body. Can be prevented by the first and second covering materials, so that the elasticity of the upper elastic body and the lower elastic body is increased due to the surroundings of the upper elastic body and the lower elastic body being solidified with concrete material. There is an advantage that the situation of being lost can be effectively prevented.

The invention according to claim 6 is the bone for an upper pile .
Of the upper end plate provided at the lower end of the assembly and the frame assembly for the lower pile
Since the intermediate elastic body is arranged between the upper end portion and the lower end plate, when the load is applied in the direction of bending the connecting portion between the upper pile and the lower pile, the upper elastic body and the lower elastic body are By elastically deforming each of the body and the intermediate elastic body, it is possible to more effectively prevent the joint pile from being broken and efficiently absorb the bending load and the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a joint pile according to the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a main part of the joint pile.

FIG. 3 is a cross-sectional view showing another embodiment of the joint pile according to the present invention.

FIG. 4 is a cross-sectional view showing still another embodiment of the joint pile according to the present invention.

FIG. 5 is a cross-sectional view showing still another embodiment of the joint pile according to the present invention.

FIG. 6 is a perspective view showing another specific example of the connecting member.

FIG. 7 is a perspective view showing still another specific example of the connecting member.

FIG. 8 is a sectional view showing still another embodiment of the joint pile according to the present invention.

[Explanation of symbols]

1 Upper End Plate 2 Upper Pile 3 Lower End Plate 4 Lower Pile 5 Connecting Member 6 Upper Elastic Body 7 Lower Elastic Body 8 Upper Pile Frame Material 9 First Coating Material 10 Lower Pile Frame Material 11 Second Coating Material 15 Connection Reinforcing bar 16 Projection 17 Ring body 18 Intermediate elastic body 19 First connecting member 20 Second connecting member

Claims (6)

(57) [Claims] 1. An upper part of an installation hole of a pile formed at an installation site.
After inserting the frame members for piles and the frame members for lower piles,
By injecting concrete into the installation hole of
In a joint pile consisting of cast-in-place piles that are formed by an upper end plate provided at the lower end of the frame member for the upper pile,
A lower end plate provided on the upper end of the lower pile frame member , an upper elastic body installed on the upper peripheral surface of the upper end plate, a lower elastic body installed on the lower peripheral surface of the lower end plate, and A connecting member having a pair of locking plates for connecting the upper end plate and the lower end plate by sandwiching the upper elastic body and the lower elastic body from above and below, and an inner peripheral surface portion and an upper surface portion of the upper elastic body. A first covering member having an L-shaped cross section fixed to the upper surface of the upper end plate so as to cover it, and a cross section L fixed to the lower surface of the lower end plate so as to cover the inner peripheral surface and the lower surface of the lower elastic body.
A second cover member having a V-shape, the connecting member is divided into a plurality of pieces in the circumferential direction of the joint pile, and the upper end plate and the lower end plate are restricted from lateral movement relative to each other. the regulating section is provided, the framework for the lower end and the lower pile of the upper pile for framing material
The upper pile by fitting the connecting member to the joint between the upper end plate and the lower end plate without projecting the member connecting the upper end of the member outward from the outer peripheral surface of the pile main body. for
A joint pile, characterized in that a frame member and a frame member for a lower pile are connected in the longitudinal direction . 2. A lower part of the frame member for the upper pile and a frame structure for the lower pile .
The joint pile according to claim 1, wherein the movement restricting portion is configured by a connecting reinforcing bar that connects the upper portion of the member . 3. The upper part provided at the lower end of the frame member for the upper pile
The movement restricting portion is constituted by a protrusion projecting from one of the end plate or the lower end plate provided at the upper end of the lower pile frame member to the other side. 1 or 2
The joint stakes listed. 4. The joint pile according to claim 1, wherein the movement restricting portion is constituted by a ring body that is fitted onto the connecting member and restricts lateral movement thereof. 5. An upper part of an installation hole of a pile formed at an installation site.
After inserting the frame members for piles and the frame members for lower piles,
By injecting concrete into the installation hole of
In a joint pile consisting of cast-in-place piles that are formed by an upper end plate provided at the lower end of the frame member for the upper pile,
A lower end plate provided on the upper end of the lower pile frame member , an upper elastic body installed on the upper surface of the outer peripheral portion of the upper end plate, a lower elastic body installed on the lower surface of the outer peripheral portion of the lower end plate, A first connecting member having a locking plate pressed against the upper surface of the upper elastic body;
A second plate having a locking plate that is pressed against the lower surface of the lower elastic body.
A connecting member, a first covering member having an L-shaped cross section fixed to the upper surface of the upper end plate so as to cover the inner peripheral surface portion and the upper surface portion of the upper elastic body, and the inner peripheral surface portion and the lower surface portion of the lower elastic body. A second covering member having an L-shaped cross section, which is fixed to the lower surface of the lower end plate so as to cover the upper end frame and the lower pile .
The upper end plate and the lower end plate are connected to each other by integrally connecting the first connecting member and the second connecting member without projecting a member connecting the frame member outward from the outer peripheral surface of the pile body. The upper pile frame member and the lower pile frame member by
A joint pile characterized by being connected in the length direction . 6. The upper part provided at the lower end of the frame member for the upper pile
The joint pile according to any one of claims 1 to 5, wherein an intermediate elastic body is arranged between the end plate and the lower end plate provided at the upper end of the lower pile frame member .