JP3142685B2 - Equipment for joining steel pipe piles and foundation beams - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for joining a steel pipe pile and a 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 for supporting an independent foundation on a pile, when a foundation beam is joined to an installed steel pipe pile, conventionally, as shown in FIG. An independent foundation made of reinforced concrete is constructed, a foundation beam is placed on the top, and the lower end is connected to an anchor bolt by connecting it to a steel pipe pile.

In this method of placing the foundation beam on a 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 it after the foundation has been built, and work cannot proceed until the concrete of the independent foundation has hardened.

The present invention has been made by paying attention to a conventional method of joining a steel pipe pile and a foundation beam, and an object of the invention is to propose a joining apparatus which can adjust the level of the foundation beam and does not require interruption of work.

[0005]

According to the present invention, an independent foundation is constructed, a foundation beam is connected to a bundle member having an integrated base plate at a lower end, and a pile head metal is connected to a head of a steel pipe pile. Adjust the level of the foundation beam by screwing the level adjustment bolt that supports the base plate to the object,
In addition, by suspending the load of the foundation beam to the level adjustment bolt until the joining of the foundation beam is completed, interruption of the work is avoided.

At the lower end of the bundle, a base plate and an annular member circumscribing the base plate are integrated, and the bundle, that is, the foundation beam, is joined to the steel pipe pile by a grout material filled in the annular member. An annular member surrounds the level adjustment bolt,
Positioning the level adjusting bolts in the horizontal plane absorbs construction errors of the bundles on the steel pipe pile on the plane.

The level adjusting bolt is screwed into the pile head metal so that the shaft is oriented vertically, and the level is adjusted with respect to the steel pipe pile by supporting the base plate at the lower end of the bundle, and the foundation beam is joined to the steel pipe pile. The vertical load and horizontal load of the foundation beam until the grout hardens are transferred and transmitted to the steel pipe pile.
The level adjustment bolt transfers the load of the foundation beam and the bundle at the time of construction to the steel pipe pile, so that the temporary beam and the overburden after joining the bundle and the steel pipe pile can be transferred to the steel pipe without the need for temporary support members. The grout material transmitted to the pile can be filled, work interruption 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 one embodiment.

As shown in FIG. 1, the joining device 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, and a bundle 2 to which the foundation beam 6 is connected, and a head of the steel pipe pile 7. A pile head metal piece 3 to be mounted on and connected to the pile head metal piece 3 and screwed in such a manner that the shaft is vertically oriented to the pile head metal piece 3 to support the base plate 21 of the bundle material 2 and adjust the level of the bundle material 2. Bolt 4 and ring member 22 filled in annular member 22 and bundle 2
And a grout material 5 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.

The pile head metal 3 cuts the head of the steel pipe pile 7 at an appropriate height, excavates the ground around the pile head, and
After the level adjustment bolt 4 screwed to the pile head metal 3 is turned to adjust the level of the head to a predetermined height, the level of the bundle 2 to which the foundation beam 6 is connected is adjusted. It is installed in the state where it was set. The base plate 21 of the bundle 2 is placed on the level adjusting bolts 4, and positioning of the bundle 2 with respect to the level adjusting bolts 4 is performed within a range where the annular member 22 circumscribes the level adjusting bolts 4.

The level adjusting bolt 4 also transfers the vertical load of the foundation beam 6 up to the filling of the grout material 5 to the steel pipe pile 7 by being screwed into the pile head metal 3 connected to the steel pipe pile 7. After hardening, the head is fixed in the grout material 5 so as to transmit a vertically upward force (pulling force) from the foundation beam 6 to the steel pipe pile 8.

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

FIG. 1 and FIG. 2 show an example in which an anchor bar 10 having an anchor plate 11 connected to a lower end thereof 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. This shows an embodiment in which the pile head metal 3 is connected to the steel pipe pile 7 by being fixed in the material 12.

In this embodiment, the vertical load applied to the foundation beam 6 and the bundle 2 is transmitted from the base plate 21 to the grout 5, transmitted to the pile head metal 3 by the compressive force of the grout 5, and transmitted to the steel pipe pile 7. You. 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, the power is transmitted to the steel pipe pile 7 by the compression force of the level adjustment bolt 4.

The pulling force from the foundation beam 6 and the bundle 2 is controlled by the shear rib 23 joined to the inner periphery of the annular member 22 from the grout 5.
Is transmitted to the level adjusting bolt 4 by the shearing force of the grout material 5, and the pile head metal 3 is transmitted by the tensile force.
Is 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 supporting 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 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 5, and the compressive force of the grout 5 causes the level adjusting bolt 4 to move 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, the frictional force between the base plate 21 and the level adjustment bolt 4 is transmitted to the pile head metal 3, and from the pile head metal 3, a projection 31 is provided on the lower surface thereof and is inscribed in the steel pipe pile 7. It is transmitted to the steel pipe pile 7.

FIG. 3 and FIG. 4 show that the diameter of the annular member 22 of the above embodiment is set to a size surrounding the pile head metal 3 and the pile head metal 3 is buried in the grout material 5 to be fixed. This is an embodiment in the case where the pile head metal 3 is joined to the pile head. Here, since the pile head metal 3 is fixed in the grout material 5, the plane area of the pile head metal 3 is made larger than the outer diameter of the steel pipe pile 7 and the outer periphery is projected from the outer periphery of the steel pipe pile 7 as shown in FIG. Instead of the level adjusting bolt 4 in the embodiment, the fixing strength of the pile head metal 3 itself can be expected, so that the level adjusting bolt 4 is downsized. The pulling force from the foundation beam 6 and the bundle 2 is transmitted to the steel pipe pile 7 by the bearing force of the portion of the pile head metal 3 projecting from the steel pipe pile 7 to the outer periphery.

FIG. 5 shows a similar manner to the embodiment of FIG. 3 in which the pile head metal 3 is surrounded by the annular member 22, the anchor bar 32 is projected above the pile head metal 3, and the anchor bar 32 is fixed in the grout material 5. This is the case where the bundle 2 and the pile head metal 3 are joined together. The pull-out force between the bundle 2 and the pile head 3 is transmitted by the tensile force of the anchor bar 32 protruding above the pile head 3 and the adhesive force therearound.

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

FIGS. 7 to 9 show the case where the annular member 22 is located above the pile head metal 3 as in the embodiment shown in FIG. With a clearance, the bolt is formed from a ring 33 surrounding the periphery of the pile head, and bolts 34 are tightened. Thing 3
This is an embodiment in which 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, the pulling force and the horizontal force from the level adjustment bolt 4, and the pile head metal 3
From the steel pipe pile 7 directly.

[0021]

As described above, the present invention constitutes an independent foundation. At the same time, the foundation beam is connected to the bundle member having the base plate integrated at the lower end, and the pile head metal is connected to the head of the steel pipe pile. Since the level adjustment bolts that support the base plate are screwed to the pile head hardware, the level adjustment of the foundation beam can be performed, and the load on the foundation beam until the joining of the foundation beam is completed is adjusted. Since the bolts bear, there is no need for temporary support members, and after joining the bundle and the steel pipe pile, the foundation beam and the grout material that transmits the loading load to the steel pipe pile can be filled, and work interruption is avoided. In addition, the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment when an annular member is arranged on a pile head metal.

FIG. 2 is a plan view of FIG.

FIG. 3 is a longitudinal sectional view showing an embodiment in which an annular member is arranged so as to surround a pile head metal.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a longitudinal sectional view showing another embodiment in which an annular member is arranged so as to surround a pile head metal.

FIG. 6 is a longitudinal sectional view showing an embodiment in a case where a pull-out force is not transmitted in the embodiment shown in FIG. 3;

FIG. 7 is a longitudinal sectional view showing another embodiment when an annular member is arranged on a pile head metal.

FIG. 8 is a partially enlarged view of FIG. 7;

FIG. 9 is a plan view of a pile head metal part in FIG. 8;

FIG. 10 is a longitudinal sectional view showing a conventional structure.

[Explanation of symbols]

1 ... joining device, 2 ... bundle material, 21 ... base plate,
22 ... annular member, 23 ... shear rib, 3 ... pile head hardware, 31
... Projection, 32 ... Anchor bar, 33 ... Ring, 34 ... Bolt, 4 ... Level adjustment bolt, 5 ... Grout material, 6
…… Foundation beam, 7… Pipe pile, 8,9… Dry mortar, 10… Anchor bar, 11… Anchor plate, 12…
... grouting material.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 27/12 E02D 27/00

Claims (1)

(57) [Claims] 1. A base plate and an annular member circumscribing the base plate are integrated at a lower end thereof, a bundle connected to a foundation beam, a pile head mounted on a steel pipe pile head and connected thereto, and a pile head hardware A level adjustment bolt that screwes 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 for joining a leg portion of a bundle to a steel pipe pile.