JPH073817A - Joint device between steel pipe pile and footing beam - Google Patents

Abstract

PURPOSE:To make level adjustment of a footing beam in the case the footing beam is connected to a steel pipe pile and to prevent the interruption of work. CONSTITUTION:A joint device is constituted of an integrated unit of a base plate 21 and a circular member 22 brought into contact therewith at the lower end of the device, a strut 2 to which a footing beam 6 is connected, a pile head hardware 3 mounted on the head of a steel pipe pile 7 and connected thereto, a level adjusting bolt 4 screwed to the pile head hardware 3 and bearing the base plate 21 of the strut 2 and grout 5 filled in the circular member 22 and connecting a leg section of the strut 2 to the steel pipe pile 7. A level of the footing beam 6 is adjusted by the level adjusting bolt 4, and the interruption of work is prevented by bearing the load of the footing beam on the level adjusting bolt 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining device for a steel pipe pile and a foundation beam, which joins the foundation beam in a state of being positioned with respect to the steel pipe pile.

[0002]

2. Description of the Related Art In a pile foundation in which an independent foundation is supported by a pile, when a foundation beam is joined to an installed steel pipe pile, conventionally, as shown in FIG. An independent reinforced concrete foundation is constructed, a foundation beam is placed on the top end of the foundation, and the lower end is connected to an anchor bolt to join the steel pipe pile.

In this method of mounting the foundation beam on the concrete independent foundation, it is possible to absorb the construction error on the plane of the steel pipe pile by shifting the position of the bundle with respect to the pile core, but the foundation beam is independent. It is difficult to adjust the level of the foundation beam because it is placed on the foundation after it is built, and the work cannot proceed until the concrete of the independent foundation is hardened.

The present invention was made by paying attention to the conventional method for joining a steel pipe pile and a foundation beam, and it is an object of the present invention to propose a joining apparatus capable of adjusting the level of the foundation beam and requiring no interruption of work.

[0005]

According to the present invention, an independent foundation is constructed, and a foundation beam is connected to a bundle material in which a base plate is integrated at the lower end thereof, and at the same time, a pile down metal member is connected to the head of a steel pipe pile to form a pile down metal. Adjust the level of the foundation beam by screwing the level adjustment bolt that supports the base plate to the object,
In addition, the load of the foundation beam until the joining of the foundation beams is completed is borne by the level adjustment bolts to avoid interruption of work.

At the lower end of the bundle, an annular member circumscribing the base plate is integrated with the base plate, and the bundle, that is, the foundation beam is joined to the steel pipe pile by the grout material filled in the annular member. The annular member surrounds the level adjustment bolt,
Positioning in the horizontal plane with respect to the level adjustment bolt absorbs the construction error in the plane of the bundle for the steel pipe pile.

The level adjusting bolt is screwed onto the pile head metal fitting with its axis vertically, and the base plate at the lower end of the bundle is supported to adjust the level of the level adjusting bolt with respect to the steel pipe pile, and the foundation beam is joined to the steel pipe pile. The vertical load and horizontal load of the foundation beam until the grout material is hardened are borne and transmitted to the steel pipe pile.
The level adjustment bolts transfer the load of the foundation beam and the bundle material during construction to the steel pipe pile, so that the foundation beam and the load on the foundation beam after joining the bundle material and the steel pipe pile are The grout material that is transmitted to the pile can be filled, work interruptions can be avoided, and the construction period can be shortened.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment.

As shown in FIG. 1, the joining apparatus 1 of the present invention has a base plate 21 and an annular member 22 circumscribing the base plate 21 integrated at the lower end thereof, and a bundle member 2 to which a foundation beam 6 is connected and a head portion of a steel pipe pile 7. Level adjustment for mounting the pile head hardware 3 connected thereto and screwing the pile head hardware 3 with the shaft vertically oriented to support the base plate 21 of the bundle 2 and adjust the level of the bundle 2. The bolt 4 and the annular member 22 are filled with the bundle 2 and the steel pipe pile 7
And the grout material 5 to be joined to the steel pipe pile 7 while adjusting the position and level of the foundation beam 6 in the horizontal plane with respect to the steel pipe pile 7.

As for the pile head metal 3, the head of the steel pipe pile 7 is cut at an appropriate height, the ground around the pile head is excavated, and the dry mortar 8 is used.
After leveling, the level adjustment bolts 4 screwed into the pile head hardware 3 are turned to adjust the level of the head to a predetermined height, and then the level of the bundle 2 to which the foundation beams 6 are connected is adjusted. It is installed in a closed state. The base plate 21 of the bundle 2 is placed on the level adjusting bolt 4, and the bundle 2 is positioned on the plane with respect to the level adjusting bolt 4 within a range where the annular member 22 circumscribes the level adjusting bolt 4.

The level adjusting bolt 4 is also screwed onto the pile head metal fitting 3 connected to the steel pipe pile 7 to transmit the vertical load of the foundation beam 6 until the filling of the grout material 5 to the steel pipe pile 7 and to make the grout material 5 After hardening, the head is fixed in the grout material 5 so that the vertically upward force (drawing force) from the foundation beam 6 is transmitted to the steel pipe pile 8.

After placing the bundle 2 on the level adjusting bolt 4 and adjusting its position, the gap between the lower end of the annular member 22 and the previously filled dry mortar 8 is sealed with the dry mortar 9, The grout material 5 such as concrete or mortar is filled into the annular member 22 through an opening opened in a part thereof,
The hardening completes the joining of the foundation beam 6 and the steel pipe pile 7.

FIGS. 1 and 2 show a grout in which an anchor bar 10 having an anchor plate 11 at its lower end is connected to a pile head metal 3, and the anchor bar 10 and the anchor plate 11 are filled in the head of the steel pipe pile 7. It shows an embodiment in which the pile head hardware 3 is connected to the steel pipe pile 7 by being fixed in the material 12.

In this embodiment, the vertical load received by the foundation beam 6 and the bundle member 2 is transmitted from the base plate 21 to the grout member 5, and is transmitted to the pile head metal member 3 by the compressive force of the grout member 5 and is transmitted to the steel pipe pile 7. It Since the vertical load until the strength development of the grout material 5 is only the foundation beam 6 and the bundle material 2,
As described above, it is transmitted to the steel pipe pile 7 by the compressive force of the level adjusting bolt 4.

The pulling-out force from the foundation beam 6 and the bundle 2 is from the shear rib 23 joined to the inner circumference of the annular member 22 to the grout 5
Is transmitted to the level adjusting bolt 4 by the shearing force of the grout material 5, and the tensile force thereof is applied to the pile head hardware 3
Be transmitted to. Further, it is transmitted to the steel pipe pile 7 by the adhesive force between the anchor bar 10 of the pile head metal 3 and the grout material 12. In this embodiment, the pull-out force is converted into a tensile force by the bearing force acting on the lower surface of the head of the level adjusting bolt 4, so that the level adjusting bolt 4 is larger than those in the embodiments shown in FIGS.

The horizontal force from the foundation beam 6 and the bundle 2 is transmitted from the annular member 22 to the grout material 5, and the compression force of the grout material 5 causes the level adjusting bolt 4 to the pile head metal 3, and further from the anchor bar 10. It is transmitted to the steel pipe pile 7. Until the grout material 5 is hardened, it is transmitted to the pile head metal member 3 by the frictional force between the base plate 21 and the level adjusting bolt 4, and is protruded from the pile head metal member 3 to the lower surface thereof, and is projected by the projection 31 inscribed in the steel pipe pile 7. It is transmitted to the steel pipe pile 7.

3 and 4 show that the annular member 22 of the above embodiment has a diameter so as to surround the pile head metal 3, and the pile head metal 3 is embedded in the grout material 5 and fixed to the bundle material 2. It is an example in the case where and the pile head hardware 3 are joined. Here, since the pile head hardware 3 is fixed in the grout material 5, the plane area of the pile head hardware 3 is made larger than the outer diameter of the steel pipe pile 7, and the outer circumference is made to protrude from the outer circumference of the steel pipe pile 7. In place of the level adjusting bolt 4 in the above embodiment, the fixing strength of the pile head hardware 3 itself can be expected, so that the level adjusting bolt 4 is downsized. The pulling-out force from the foundation beam 6 and the bundle 2 is transmitted to the steel pipe pile 7 by the support pressure of the portion of the pile head metal member 3 that projects from the steel pipe pile 7 to the outer periphery.

In the same manner as in the embodiment of FIG. 3, FIG. 5 surrounds the pile head hardware 3 with an annular member 22, projects an anchor bar 32 above the pile head metal 3, and anchors the anchor bar 32 in the grout material 5. This is a case where the bundle 2 and the pile head hardware 3 are joined by performing the above. The pulling-out force between the bundle 2 and the pile head metal 3 is transmitted by the tensile force of the anchor bar 32 protruding above the pile head metal 3 and the adhesive force around it.

FIG. 6 shows an embodiment in which a pile head metal member 3 applied to a portion where it is not necessary to transmit the pulling force from the foundation beam 6 and the bundle member 2 to the steel pipe pile 7 is used. Comes with level adjustment bolt 4 only.

FIGS. 7 to 9 show that when the annular member 22 is positioned above the pile head hardware 3 as in the embodiment shown in FIG. 1, the pile head hardware 3 is placed between the inner peripheral surface of the pile head. With a clearance to form on the pile head, tighten the bolt 34 from the ring 33 that surrounds the outer periphery of the pile head, crimp the head of the steel pipe pile 7, and bring it into close contact with the pile top metal fitting 3. Thing 3
It is an example in the case where is connected to the steel pipe pile 7. In this embodiment, the head of the steel pipe pile 7 is caulked and integrated with the pile head metal 3, so that the vertical load from the grout material 5 and the pulling force and horizontal force from the level adjusting bolt 4 are
Is directly transmitted to the steel pipe pile 7.

[0021]

The present invention is as described above, and at the same time as connecting the foundation beam to the bundle material in which the base plate is integrated to the lower end, the pile beam is connected to the head of the steel pipe pile, Since the level adjustment bolts that support the base plate are screwed into the pile head hardware, the level of the foundation beam can be adjusted, and the load of the foundation beam until the connection of the foundation beam is completed is level adjusted. Since the bolts do not require temporary support members, the foundation beam and the grout material that transfers the load on it to the steel pipe pile can be filled after joining the bundle material and the steel pipe pile, and work interruption can be avoided. The work period can be shortened.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment in which an annular member is arranged on a pile head hardware.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical cross-sectional view showing an embodiment in which an annular member is arranged so as to surround a pile head hardware.

FIG. 4 is a plan view of FIG.

FIG. 5 is a vertical cross-sectional view showing another embodiment in which the annular member is arranged so as to surround the pile head hardware.

FIG. 6 is a vertical cross-sectional view showing an embodiment in which the pulling force is not transmitted in the embodiment shown in FIG.

FIG. 7 is a vertical cross-sectional view showing another embodiment in which the annular member is arranged on the pile head hardware.

FIG. 8 is a partially enlarged view of FIG.

9 is a plan view of the pile head hardware portion of FIG. 8. FIG.

FIG. 10 is a vertical cross-sectional view showing a conventional structure.

[Explanation of symbols]

1 ... Joining device, 2 ... Bundle, 21 ... Base plate,
22 …… Annular member, 23 …… Shear rib, 3 …… Pile head hardware, 31
...... Protrusion, 32 ...... Anchor streak, 33 ...... Ring, 34 ...... Bolt, 4 …… Level adjustment bolt, 5 …… Grout material, 6
…… Foundation beams, 7 …… Steel pipe piles, 8,9 …… Dry mortar, 10 …… Anchor bars, 11 …… Anchor plates, 12…
… Grout material.

Claims (1)

[Claims] 1. A base plate and an annular member circumscribing the base plate are integrated at a lower end thereof, and a bundle material to which a foundation beam is connected, a pile head metal member mounted on the head of a steel pipe pile and connected thereto, and a pile head metal member. A level adjustment bolt that screws the shaft vertically to support the base plate of the bundle and adjusts the level of the bundle,
A joining device for a steel pipe pile and an independent foundation, which is filled in an annular member and is composed of a grout material that joins leg portions of a bundle material to the steel pipe pile.