JP2015161129A - Pile-member joint method and junction structure of pile-member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member joint method capable of easily obtaining a high joint force improving the workability relevant to joint work, joint release work and position adjustment work.SOLUTION: When joining a pile member 1 with another member (a hat-like member 2 or a bridge lower member), fixing collar 3, which is constituted of division end parts 3A1 (3A2) and 3B1 (3B2) being divided in a circumference direction, and which are disposed being opposed to each other, and are coupled with each other by a cylinder device 20, is disposed on the outer periphery of the pile member. By tightening the fixing collar 3 via the cylinder device 20, the pile member is held by the division end parts of the fixing collar by the inner face of the fixing collar. The other member is joined with the pile member by holding the other member between the pieces of the fixing collar 3.

Description

  The present invention relates to a member joining method to a pile and a member joining structure to a pile, in which another member is joined to the pile member.

Pile is used as a base member to support buildings such as buildings and bridges. The pile is placed in the ground, and the lower part of the building is connected to the head to support the building. The pile receives a load such as a vertical load, a horizontal load, and a falling moment from the building.
Conventionally, as a technique for increasing the bearing capacity of the pile, a knotted pile provided with a node part and an enlarged diameter part has been proposed. In order to solve the problems of this technique, Patent Document 1 describes a foundation. A pile foundation structure composed of a pile and a cap member having an opening through which the foundation pile is inserted has been proposed. Such a cap member is buried near the ground surface and joined to the pile member. Further, the lower part of the building is joined to the head of the pile member protruding upward from the opening of the shade member.
Generally, the pile member and other members are joined by a method such as bolt joining or welding.

JP 2012-219482 A

However, when the pile member and other members are joined by a conventional method such as bolt joining or welding, there are the following problems.
That is, once bonded, it is difficult to unbond, and it is difficult to dismantle and adjust the bonding position, there is a possibility that the construction may become impossible when the construction load becomes very large, the pile member and When the joint portion with other members is underwater or the like, there is a problem that the efficiency of the joining work is lowered and the cost required is remarkable.

  The present invention was made in view of the above problems in the prior art, and in joining other members to the pile member, while improving workability related to joining work, joining release work, position adjustment work, As a result of the joining work, an object is to easily impart a high joining force.

Invention of Claim 1 for solving the above subject is a member joining method to a pile which joins other members to a pile member,
A fixing collar in which circumferentially divided end portions facing each other are connected to each other by a cylinder device is fitted on the pile member, and the fixing collar is changed in diameter through the cylinder device and fixed. A pile that joins the other member to the pile member by gripping the pile member on the inner peripheral surface of the collar so as to sandwich the other member between the divided end portions of the fixing collar. This is a member joining method.

  According to a second aspect of the present invention, the pile member and the other member are gripped by applying to the cylinder device a wedge that restricts expansion and contraction of the cylinder device in the direction in which the diameter of the fixing collar is changed. The method for joining members to a pile according to claim 1, wherein a decrease in gripping force is prevented.

  The invention according to claim 3 is the member joining method to the pile according to claim 1 or 2, characterized in that the protrusion provided on the other member is gripped by the fixing collar. .

  According to a fourth aspect of the present invention, any one of the first to third aspects is characterized in that the other member is a cap-shaped member that has an opening through which the pile member is inserted and is buried near the ground surface. It is the member joining method to the pile as described in kaichi.

  The invention according to claim 5 is the member joining method to a pile according to any one of claims 1 to 3, wherein the other member is a bridge lower member.

The invention according to claim 6 is a member joining structure to a pile that joins another member to the pile member,
A fixing collar in which circumferentially divided split ends that are opposed to each other are connected by the cylinder device, and the fixing collar is externally fitted to the pile member, through the cylinder device The diameter of the fixing collar is reduced, and the pile member is gripped by the inner peripheral surface of the fixing collar so that the other members are sandwiched between the divided end portions of the fixing collar. It is the member joint structure to the pile comprised so that the said other member could be joined to the said pile member.

  The invention according to claim 7 is a member joining structure to a pile according to claim 6, further comprising a wedge for restricting expansion and contraction of the cylinder device in a direction in which the diameter of the fixing collar is changed. .

  The invention according to claim 8 is characterized in that the other member is provided with a protrusion, and the protrusion is disposed between the divided end portions. It is a junction structure.

  The invention according to claim 9 is the pile according to claim 8, wherein the protrusion is provided with a hole, and the piston rod of the cylinder device has a structure in which the divided end portions are connected to each other through the hole. This is a member joining structure.

  According to the present invention, the diameter of the fixing collar is changed through the cylinder device so that the pile member is sandwiched between the inner peripheral surfaces of the fixing collar and the other members are sandwiched between the split end portions of the fixing collar. Therefore, when joining other members to the pile member, it is possible to perform the joining work by changing the diameter of the fixing collar through the cylinder device, and the fixing collar can be expanded through the cylinder device. The joint release work can be performed by changing the diameter, and the position adjustment work can be performed in the joint release state, and these workability is good. At the same time, as a result of the joining work, the pile member is gripped on the inner peripheral surface of the fixing collar so that other members are sandwiched between the split end portions of the fixing collar, so a high joining force is easily imparted. can do.

It is the figure which looked at the member joining structure to the pile concerning one embodiment of the present invention perpendicularly. It is the figure which looked horizontally at the member joining structure to the pile concerning one embodiment of the present invention. It is the figure which showed arrangement | positioning of the cylinder apparatus and wedge which looked at the axial direction of the cylinder apparatus. (a1) is a structural view of the cylinder device viewed in a horizontal direction perpendicular to the axis of the cylinder device and shows a released state. (b1) corresponds to (a1) and shows the arrangement of the piston rod and the movable wedge of the cylinder device viewed in the axial direction of the cylinder device. (a2) shows a joined state (fastened state) in a structure diagram viewed in a horizontal direction perpendicular to the axis of the cylinder device. (b2) corresponds to (a2) and is a diagram showing the arrangement of the piston rod and the movable wedge of the cylinder device viewed in the axial direction of the cylinder device. It is a side view of the bridge which applied the member junction structure to the pile concerning one embodiment of the present invention. It is a side view of the bridge which applied the member joining structure to the pile concerning one embodiment of the present invention, and shows the state where the central bridge lower part was raised and adjusted with respect to FIG.

  An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

A case where the cap member 2 as another member and the bridge lower member 10A as shown in FIGS. 5 and 6 are joined to the pile member 1 shown in FIGS. 1 and 2 will be described. For the joining, the fixing collar 3, the cylinder device 20, and the wedges 5A and 5B are used. Details of these are shown in FIGS.
As shown in FIGS. 5 and 6, the pile member 1 is placed on the ground 30. The pile member 1 is a cylindrical structure, and a concrete pipe or a steel pipe is applied. 5 and 6 show a situation where the ground surface GL on which the pile member 1 is placed is below the water surface WL.

  As shown in FIGS. 1 and 2, the cap member 2 has an opening through which the pile member 1 is inserted, has a tapered shape in which the inner diameter and the outer diameter increase toward the lower side, and is embedded in the vicinity of the ground surface GL. . Further, the upper end portion of the cap member 2 is provided with a protruding portion 2A protruding upward. This protrusion 2A is fixed in advance to the shade member 2 main body by welding or the like.

In this embodiment, the fixing collar 3 is divided into two parts 3A and 3B in the circumferential direction.
As shown in FIG. 1, each of the color part 3A and the color part 3B has split end portions 3A1, 3A2 (3B1, 3B2) extending radially outward at both ends of an arc-shaped portion having a central angle of about 180 degrees. It is formed continuously.
That is, the fixing collar 3 is divided by 180 degrees, and the divided end portions 3A1 and 3B1 facing each other and the divided end portions 3A2 and 3B2 divided in the circumferential direction are connected by the cylinder device 20, respectively. The
The fixing collar 3 is externally fitted to the pile member 1 such that the outer peripheral surface of the pile member 1 faces the inner peripheral surface of the fixing collar 3 formed in a cylindrical shape. At the same time, the protruding portion 2A is disposed between the divided end portions 3A1 (3A2) and 3B1 (3B2).

The cylinder device 20 is an actuator for connecting the color part 3A and the color part 3B and changing the diameter of the fixing collar 3 composed of these parts 3A and 3B. The working fluid such as air or oil These input / output paths 9A and 9B are connected to each other and can be operated remotely.
The diameter of the fixing collar 3 is reduced through the cylinder device 20, and the pile member 1 is projected on the inner peripheral surface of the fixing collar 3, and the split end portions 3A1 (3A2) and 3B1 (3B2) of the fixing collar 3 are protruded from each other. This is a mechanism for joining the pile member 1 to the shade member 2 as another member by gripping the portion 2A, that is, the shade member 2 as another member so as to be sandwiched therebetween. The wedges 5A and 5B are used together for fixing the joint.

  As shown in FIGS. 1 and 4, the end 8A protruding from the cylindrical portion 4 of the piston rod 8 to one side is a hole provided in the divided end portions 3A1, 3B1 (3A2, 3B2) and the projecting portion 2A (not indicated) ), And is regulated by the washer 6 and the nut 7 at the end and by the cylindrical part 4 on the opposite side, so that the divided end parts 3A1, 3B1 (3A2, 3B2), and hence the color parts 3A, 3B Are connected to each other, and the projection 2A, and thus the cap member 2 and the fixing collar 3 are also connected.

At the end 8B of the piston rod 8 protruding from the cylindrical portion 4 to the other side, a fixed wedge 5A, movable between the washer 6 and the nut 7 fixed to the end and the end surface of the cylindrical portion 4 facing the end. A wedge 5B is interposed.
The fixed wedge 5A is provided with a hole (not shown), and is held so as not to move in the radial direction of the piston rod 8 by passing the piston rod 8 through the hole. As shown in FIGS. 3 and 4 (b1) and (b2), the movable wedge 5B has a gate-type structure that avoids the piston rod 8, and is disposed radially inward of the piston rod 8 so as to straddle the piston rod 8. It moves and is inserted between the cylinder part 4 and the fixed wedge 5A.
Thereby, the divided end portions 3A1, 3B1 (3A2, 3B2) and the protruding portion 2A are firmly fastened and held.
As described above, the wedges 5A and 5B for restricting the expansion and contraction of the cylinder device 20 in the direction in which the diameter of the fixing collar 3 is changed in diameter are applied to the cylinder device 20. After the joining operation using the wedges 5A and 5B, even if the pressure of the working fluid in the cylinder device 20 is reduced, the wedges 5A and 5B cause the cylinder device 20 to expand and contract in the direction in which the diameter of the fixing collar 3 is changed. And the reduction of the gripping force for gripping the pile member 1 and the cap member 2 is prevented.

Again, the member joining method to the pile of this embodiment is demonstrated along the procedure.
After the pile member 1 is driven on the ground 30, the pile member 1 and the fixing collar 3 are inserted in a manner in which the pile member 1 is inserted into the fixing member 3 and the fixing member 3 connected via the cylinder device 20. It descends and the shade member 2 is buried near the ground surface GL. At this time, as shown in FIGS. 4 (a1) and (b1), the cylinder device 20 is in a loose state, and the fixing collar 3 has an inner diameter sufficient for the pile member 1 to be inserted.
After embedding the cap member 2, the cylinder device 20 is operated so as to reduce the protruding amount of the end 8 </ b> A of the piston rod 8. Accordingly, the diameter of the fixing collar 3 changes. In this manner, the diameter of the fixing collar 3 is reduced to change the pile member 1 on the inner peripheral surface of the fixing collar 3, and the cap-shaped member 2 between the divided end portions 3A1, 3B1 (3A2, 3B2) of the fixing collar 3. The cap-shaped member 2 is joined to the pile member 1 by gripping the protruding portions 2A so as to sandwich the protruding portions 2A.
Next, as shown in FIGS. 4 (a2) and (b2), the movable wedge 5B is fitted between the cylindrical portion 4 and the fixed wedge 5A, and the joint between the pile member 1 and the cap member 2 is firmly held. .

Next, the case where the other member joined to the pile member is a bridge lower member will be described.
The lower member 10A of the bridge 10 shown in FIGS. 5 and 6 is formed of a cylindrical body such as a steel pipe. The pile head of the pile member 1 is inserted into the lower member 10A, and the bridge 10 is supported. A protrusion 10A1 is provided in advance by welding or the like so as to extend downward on the outer peripheral surface of the lower end portion of the lower member 10A. The protrusion 10 </ b> A <b> 1 is a portion corresponding to the protrusion 2 </ b> A of the cap member 2, and is a portion that is gripped by the fixing collar 3.
The fixing collar 3 externally fitted to the pile member 1 is arranged under the lower member 10A, and the fixing collar 3 is reduced in diameter via the cylinder device 20 to be fixed in the same manner as the shade-shaped member 2. The lower member 10 </ b> A is joined to the pile member 1 by gripping the pile member 1 on the inner peripheral surface of the collar 3 so as to sandwich the protruding portion 10 </ b> A <b> 1 between the divided end portions of the fixing collar 3. By this joining, the bridge lower member 10A and the pile member 1 become an integral structure, and a stronger bridge can be constructed.
The only difference is that the protrusion 2A of the cap member 2 extends upward, whereas the protrusion 10A1 of the lower member 10A extends downward. 1 to 4 are the same as the wedges 5A and 5B.
In addition, regarding the fixing collar 3 that is applied to the joining of the lower member 10 </ b> A, the insertion can be made smooth by providing the cap-shaped guide portion 3 </ b> C that guides the insertion of the pile member 1.

  The fixing collar 3 can be installed by connecting the fixing collar 3 to the lower end of the lower member 10A by the cylinder device 20 before the pile member 1 is inserted into the lower member 10A. Is inserted into the lower member 10 </ b> A and then assembled by arranging the color parts 3 </ b> A and 3 </ b> B on the outer periphery of the pile member 1 below the lower member 10 </ b> A and connecting them by the cylinder device 20.

As shown in FIGS. 5 and 6, any joining position can be selected.
Even after joining, the joining and releasing operation can be performed by loosening the cylinder device 20 and changing the diameter of the fixing collar 3 to increase the diameter. For example, the state shown in FIG. 5 is changed to the state shown in FIG. And position adjustment work can be performed. It is preferable to drive the movable wedge 5B after sufficiently adjusting the position. When the position adjustment is performed again after driving the movable wedge 5B, and when disassembling, the movable wedge 5B is moved outward in the radial direction of the piston rod 8 and released.

As described above, by operating the cylinder device remotely and fastening it, and further applying a wedge, it is possible to easily apply a high joining holding force, and the joining work, joining release work and joining position adjusting work. Is easy.
Further, since the fixing collar 3 can be arranged at an arbitrary position along the axial direction of the pile member 1, the cap member 2 and the bridge lower member 10A, etc. Arbitrary members can be joined.
Thus, by being able to join at arbitrary height positions, the joining position of the cap-shaped member 2 with respect to the pile member 1 can be adjusted, and it can respond to the change of topography as shown in FIG.5 and FIG.6.
Further, by being able to join at an arbitrary height position, as shown in FIGS. 5 and 6, the position of the bridge lower member 10A can be adjusted to adjust the height of the bridge.
Moreover, since the fixing collar 3 can be rotated around the pile member 1, the arrangement angle around the axis of the pile member 1 of other members to be joined to the pile member 1 can be arbitrarily selected and has directionality. This is convenient when joining the member to the pile member 1.

  In the above embodiment, the fixing collar dividing portions are provided at two locations. Regardless of this, it is possible to make the fixing collar C-shaped by dividing the fixing collar into one place, and by increasing the number of parts divided in the circumferential direction of the fixing collar, the number of parts can be increased to three or more. It is also possible. The number of division parts of the fixing collar is equal to the number of gripping portions (= installation locations of the cylinder device 20) of other members. Therefore, in order to give an equal gripping force or a firm gripping force to other members joined to the pile member, it is preferable that the fixing collar has a plurality of divided portions.

DESCRIPTION OF SYMBOLS 1 Pile member 2 Shade-shaped member 2A Protrusion part 3 Fixing collar 3A1 Split end part 3A2 Split end part 3B1 Split end part 3B2 Split end part 5A Fixed wedge 5B Movable wedge 8 Piston rod 10 Bridge 10A Bridge lower member 10A1 Projection part 20 Cylinder apparatus

Claims (9)

It is a member joining method to a pile that joins another member to a pile member,
A fixing collar in which circumferentially divided end portions facing each other are connected to each other by a cylinder device is fitted on the pile member, and the fixing collar is changed in diameter through the cylinder device and fixed. A pile that joins the other member to the pile member by gripping the pile member on the inner peripheral surface of the collar so as to sandwich the other member between the divided end portions of the fixing collar. Member joining method to   By applying to the cylinder device a wedge that restricts expansion and contraction of the cylinder device in the direction in which the diameter of the fixing collar is changed, it is possible to prevent a decrease in gripping force for gripping the pile member and the other members. The method for joining members to a pile according to claim 1.   The method of joining a member to a pile according to claim 1 or 2, wherein a protrusion provided on the other member is gripped by the fixing collar.   4. The pile according to claim 1, wherein the other member is a cap-shaped member that has an opening through which the pile member is inserted and is embedded in the vicinity of the ground surface. 5. Member joining method.   The member joining method to a pile according to any one of claims 1 to 3, wherein the other member is a bridge lower member. It is a member joining structure to a pile that joins other members to the pile member,
A fixing collar in which circumferentially divided split ends that are opposed to each other are connected by the cylinder device, and the fixing collar is externally fitted to the pile member, through the cylinder device The diameter of the fixing collar is reduced, and the pile member is gripped by the inner peripheral surface of the fixing collar so that the other members are sandwiched between the divided end portions of the fixing collar. The member joining structure to the pile comprised so that the said other member could be joined to the said pile member.   The member joining structure to a pile according to claim 6, further comprising a wedge for restricting expansion and contraction of the cylinder device in a direction in which the diameter of the fixing collar is changed.   The member joining structure to the pile according to claim 6 or 7, wherein the other member is provided with a protruding portion, and the protruding portion is disposed between the divided end portions.   The member joint structure to a pile according to claim 8, wherein a hole is provided in the protrusion, and a piston rod of the cylinder device has a structure in which the split end portions are connected to each other through the hole.

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