JPH0718278B2 - Concrete cylinder and its connection method - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to prestressed concrete cylinders such as poles and piles and methods for connecting them.

[0002]

2. Description of the Related Art Concrete poles used for tall utility poles, lighting poles, net poles, etc. are constructed by connecting several centrifugally molded prestressed concrete poles.

When connecting the poles, as shown in FIG. 12, the lower pole 1 and the upper pole 2 are placed horizontally on a stand 3 and arranged in a straight line, and the upper end of the lower pole 1 is The end plate 4 and the end plate 5 at the lower end of the upper pole 2 face each other with a gap.

The upper end of the lower pole 1 is shown in FIGS.
As shown in, a narrow upper band 3 curved in a semi-circular shape
A guide tool in which both ends of a wide lower band 32 curved in a semicircular arc shape are connected to each other by bolts and nuts 33 is fitted and fixed.

The upper pole 2 is lifted and the lower pole 1 is lifted.
As shown in FIG. 15, the row of scaffolding bolt holes 12 for scaffolding fittings linearly arranged at equal intervals on the outer peripheral surface of the upper pole 2 is moved to the outer peripheral surface of the lower pole 1 similarly to the outer peripheral surface of the lower pole 1. Are arranged on the same line as the row of the bolt holes 12 for the scaffolding fitting arranged in the above, and the lower end of the upper pole 2 is mounted on the lower band 32 of the guide fixed to the upper end of the lower pole 1. Then, the upper pole 2 is placed on the base 3 again.

Next, the plurality of shaft center adjusting bolts 34 penetrating the lower band 32 of the guide rotate and move back and forth,
The lower pole of the upper pole 2 is finely moved so that the axis of the upper pole 2 matches the axis of the lower pole 1.

The upper pole 2 and the lower pole 1 whose axes are aligned are brought closer to each other, and the end plate 5 at the lower end of the upper pole 2 and the end plate 4 at the upper end of the lower pole 1 are brought into contact with each other, or very close to each other. Bring them close together.

The end plate 5 at the lower end of the upper pole 2 and the end plate 4 at the upper end of the lower pole 1 are temporarily fixed by welding several places of the groove portion 13 formed on the outer periphery of them, and a guide tool is provided. After removing, the entire circumference of the groove 13 is welded and permanently fixed.

A concrete pile driven deep into the ground is constructed by connecting several piles made of centrifugally molded prestressed concrete.

When connecting the piles, the lower piles are driven into the ground leaving their upper ends, and then the upper piles are vertically suspended above the upper ends of the lower piles protruding above the ground,
The lower pile and the upper pile are arranged in a straight line, and the upper end plate of the lower pile and the lower end plate of the upper pile face each other with a gap.

The lower pile is mounted on the end plate at the upper end of the lower pile with the lower end of the upper pile being finely moved by hand while the lower pile is being moved.

The end plate at the lower end of the upper pile and the end plate at the upper end of the lower pile are welded and fixed at the groove portions of their outer circumferences.

[0013]

However, in the above case of connecting the poles, the operation of arranging the row of bolt holes for scaffolding metal fittings of the upper pole on the same line as the row of bolt holes for scaffolding metal fittings of the lower pole, It takes a lot of time and effort to match the axis of the upper pole with the axis of the lower pole,
Difficult to do accurately.

The guide tool is heavy, and it takes a lot of time to attach and remove the guide tool to and from the lower pole.

Further, in the guide tool, there is a risk of pinching a finger between the lower band and the lower pole when operating the shaft center adjusting bolt.

In the above case of connecting piles, the work of aligning the shaft center of the upper pile with the shaft center of the lower pile requires a lot of labor and is difficult to perform accurately.

Further, when the upper pile is placed on the lower pile with its axis aligned with the axis of the lower pile, there is a high risk of pinching a finger between the two piles.

After all, it is difficult to connect prestressed concrete cylinders such as poles and piles efficiently, accurately and safely.

An object of the present invention is to solve the above conventional problems.

[0020]

According to the present invention, a lower cylinder such as a pole or pile made of prestressed concrete and an upper cylinder are arranged in a straight line, and an end plate at the upper end of the lower cylinder is provided. At least two screw holes for tension line remaining in the end plate of the upper cylinder or the lower cylinder face the end plate of the lower end of the upper cylinder, and the screw teeth base end of the positioning pin are respectively provided. Screw each other, and fit the tip of each positioning pin projecting to the end plate of the upper cylinder or the lower cylinder into the screw hole for tension line tension remaining on the end plate of the other cylinder. Then, the axis of the upper cylinder and the axis of the lower cylinder are matched, and the end plate at the lower end of the upper cylinder and the end plate at the upper end of the lower cylinder are fixed. Is.

Further, according to the present invention, the lower cylinder and the upper cylinder such as poles and piles made of prestressed concrete are arranged in a straight line, and the end plate at the upper end of the lower cylinder and the upper cylinder are A concrete cylinder that faces the bottom end plate, aligns the shaft center of the upper cylinder with the shaft center of the lower cylinder, and fixes the bottom end plate of the upper cylinder and the top end plate of the lower cylinder. In aligning the axial centers of the upper cylinder and the lower cylinder in the connection method of 1), at least two screw holes for tension line tension remaining in the end plate of the upper cylinder or the lower cylinder are respectively provided. , The threaded base ends of the positioning pins are screwed together, and the tips of the positioning pins protruding from the end plate of the upper cylinder or the lower cylinder are respectively retained on the end plates of the other cylinder. Connection of concrete cylinder characterized by fitting into screw hole for line tension It is the law.

In the present invention, the lower pole and the upper pole made of prestressed concrete are arranged in a straight line,
The end plate at the upper end of the lower pole and the end plate at the lower end of the upper pole face each other, and the row of bolt holes for scaffolding fittings on the outer peripheral surface of the upper pole and the row of bolt hole for scaffolding fittings on the outer surface of the lower pole are the same. In the method of connecting concrete cylinders, which are arranged on a line, the axis of the upper pole and the axis of the lower pole are aligned, and the lower end plate of the upper pole and the upper end plate of the lower pole are fixed. For arranging the rows of bolt holes for scaffolding metal of the lower pole and the lower pole on the same line, and for aligning the axes of the upper pole and the lower pole, for tension line tension remaining on the end plate of the upper pole or the lower pole At least 2 of the screw holes
Screw the toothed base end of the positioning pin into
A concrete cylinder characterized in that the tip end of each positioning pin protruding from the end plate of the upper pole or the lower pole is fitted into the screw hole for tension line tension remaining on the end plate of the other pole. How to connect the body.

[0023]

In the present invention, the work of aligning the axial centers of the upper and lower cylinders such as poles and piles is performed for tension line tension remaining on the end plates of the upper and lower cylinders. Since it is performed by using the screw holes and the positioning pins, it does not require much labor and is easy to perform accurately and safely.

In addition, the rows of the scaffolding bolt holes of the upper pole and the lower pole are arranged on the same line, and the work of aligning the axial centers of the upper pole and the lower pole is performed by the end plates of the upper pole and the lower pole. It is carried out by utilizing the remaining screw holes and the positioning pins for tightening the tension wire, which does not require much labor and is easy to perform accurately and safely.

[0025]

In the present invention, the connection of the prestressed concrete cylinders such as poles and piles is
Compared to the conventional case, it is easy to perform efficiently, accurately and safely.

[0026]

【Example】

<First embodiment (see FIGS. 1 to 8)> This embodiment is an example in which two centrifugally molded prestressed concrete lower poles 1 and upper poles 2 are connected.

As shown in FIG. 1, the lower pole 1 and the upper pole 2 are placed horizontally on a base 3 and arranged in a straight line, and the end plate 4 at the upper end of the lower pole 1 and the upper pole 2 are arranged. The end plates 5 at the lower end of 2 are faced with a space.

The end plate 4 at the upper end of the lower pole 1 and the end plate 5 at the lower end of the upper pole 2 are circular steel plates of the same size, as shown in FIGS. A large diameter end of a tension wire 8 that penetrates the insertion hole 6 at a predetermined same position and penetrates a cylindrical concrete 7 is fixed to each insertion hole 6, and a screw hole used when the tension wire 8 is tightened. 9 penetrates and remains at a predetermined same position.

FIG. 4 shows two of the many screw holes 9 for tension line tension remaining in the end plate 4 at the upper end of the lower pole 1 at two symmetrical positions sandwiching the center of the end plate 4. By screwing the screw tooth base end portion 11 of the positioning pin 10, as shown in FIG.
Two positioning pins 10 are provided on the end plate 4 at the upper end of the lower pole 1.
Are projected at symmetrical positions with the center of the end plate 4 interposed therebetween.

After that, the upper pole 2 moves to the lower pole 1 side and rotates, and as shown in FIG. 6, bolt holes for scaffolding fittings which are linearly arranged at equal intervals on the outer peripheral surface of the upper pole 2. Each row of 12 pins is arranged on the same line as the row of the bolt holes 12 for scaffolding fittings which are similarly arranged on the outer peripheral surface of the lower pole 1, and each positioning pin protruding to the end plate 4 at the upper end of the lower pole 1. The tip end portions of the upper poles 2 and 10 are fitted into the screw holes 9 of the lower end plate 5 of the upper pole 2 which correspond to the positioning pins 10 of the screw holes 9 for tension wire tension. Align the axis of the and the axis of the lower pole 1.

After the end plate 5 at the lower end of the upper pole 2 is brought into contact with or very close to the end plate 4 at the upper end of the lower pole 1, FIG.
As shown in FIG. 8, the end plate 5 at the lower end of the upper pole 2 and the end plate 4 at the upper end of the lower pole 1 are welded and fixed to the groove portion 13 formed on their outer circumferences.

That is, the lower end of the upper pole 2 and the lower pole 1
Connect the upper ends of to form a tall concrete pole.

<Second Embodiment (See FIGS. 9 to 11)> This embodiment is an example in which two lower piles 21 and upper piles 22 made of centrifugal force-molded prestressed concrete are connected.

The upper end plate 4 of the lower pile 21 and the lower end plate 5 of the upper pile 22 have the same structure as the upper end plate 4 of the lower pole 1 and the lower end plate 5 of the upper pole 2 in the previous example. Is.

After the lower pile 21 has been driven into the ground leaving the upper end, the center of the end plate 4 of the many screw holes for tension line tension remaining in the end plate 4 at the upper end of the lower pile 21 is set. As shown in FIG. 9, the screw tooth base end portions 1 of the positioning pin 10 having the same structure as in the previous example are respectively provided at two symmetrical positions to be sandwiched.
1 is screwed together, and two positioning pins 10 are projected on the end plate 4 at the upper end of the lower pile 21 at symmetrical positions with the center of the end plate 4 interposed therebetween.

Above the upper end of the lower pile 21 protruding above the ground, as shown in FIG. 10, the upper pile 22 is hung vertically to arrange the lower pile 21 and the upper pile 22 in a straight line. The end plate 4 at the upper end of the lower pile 21 and the end plate 5 at the lower end of the upper pile 22 face each other with a gap.

As the upper pile 22 descends, its lower end is slightly moved by hand, and as shown in FIG. 11, the tip ends of the positioning pins 10 projecting from the end plate 4 at the upper end of the lower pile 21 are respectively moved. Of the screw holes for tension line tension remaining in the end plate 5 at the lower end of the upper pile 22, the screw holes at positions corresponding to the positioning pins 10 are fitted, and the axis of the upper pile 22 is set to the shaft of the lower pile 21. The end plate 5 at the lower end of the upper pile 22 is mounted on the end plate 4 at the upper end of the lower pile 21 in conformity with the core.

The end plate 5 at the lower end of the upper pile 22 and the end plate 4 at the upper end of the lower pile 21 are welded and fixed to the groove portion 13 on the outer periphery thereof.

That is, the lower end of the upper pile 22 and the upper end of the lower pile 21 are connected to form a long concrete pile.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a lower pole and an upper pole are arranged on a stand in the method of connecting poles according to the first embodiment of the present invention.

FIG. 2 is an enlarged side view of a lower pole used in the pole connecting method of the same example.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged front view of a positioning pin used in the pole connecting method of the example.

FIG. 5 is a front view showing a state where a positioning pin is projected from an end plate at an upper end of a lower pole in the method of connecting the poles of the same example.

FIG. 6 is a front view showing a state in which a positioning pin of an end plate at an upper end of a lower pole is fitted into a screw hole of an end plate at a lower end of an upper pole in the pole connecting method of the example.

FIG. 7 is a front view showing a state in which an end plate at the upper end of the lower pole and an end plate at the lower end of the upper pole are welded in the method of connecting the poles of the same example.

FIG. 8 is a partially enlarged vertical front view showing a state in which an end plate at an upper end of a lower pole and an end plate at a lower end of an upper pole are welded in the method of connecting the poles of the same example.

FIG. 9 is a front view showing a state in which a positioning pin is projected from an end plate at an upper end of a lower pile in the pile connecting method according to the second embodiment.

FIG. 10 is a front view showing a state in which an upper pile is arranged above a lower pile in the pile connecting method of the example.

FIG. 11 is a front view showing a state where the positioning pins of the end plate at the upper end of the lower pile are fitted into the screw holes of the end plate at the lower end of the upper pile in the pile connecting method of the example.

FIG. 12 is a front view showing a state in which a lower pole and an upper pole are arranged on a stand in the conventional pole connecting method.

FIG. 13 is a front view showing a state where a guide tool is fixed to an upper end of a lower pole in the pole connecting method of the same example.

FIG. 14 is an enlarged side view of a lower pole to which a guide tool is fixed in the pole connecting method of the same example.

FIG. 15 is a front view showing a state where the lower end of the upper pole is mounted on the guide tool at the upper end of the lower pole in the method of connecting the poles of the same example.

[Explanation of symbols]

 1 Lower Pole 2 Upper Pole 4 End Plate 5 End Plate 9 Tension Line Tightening Screw Hole 10 Positioning Pin 11 Screw Teeth Base End 12 Scaffolding Tool Bolt Hole 21 Lower Pile 22 Upper Pile

Claims (3)

[Claims] 1. A lower cylinder and an upper cylinder, such as poles and piles made of prestressed concrete, are arranged in a straight line, and an end plate at an upper end of the lower cylinder and an end plate at a lower end of the upper cylinder. Facing each other, and screwing the screw pin base end of the positioning pin into at least two of the screw holes for tension line tension remaining in the end plate of the upper cylinder or the lower cylinder, respectively. Or, the tip of each positioning pin protruding to the end plate of the lower cylinder,
Fit into the threaded hole for tension wire remaining on the end plate of the other cylinder, align the axis of the upper cylinder with the axis of the lower cylinder, and end plate of the lower end of the upper cylinder. A concrete cylinder characterized in that an end plate at the upper end of the lower cylinder is fixed. 2. An end plate at the upper end of the lower cylinder and an end plate at the lower end of the upper cylinder, in which the lower cylinder and the upper cylinder, such as poles and piles made of prestressed concrete, are arranged in a straight line. In the connection method of the concrete cylinders, facing each other, aligning the axis of the upper cylinder with the axis of the lower cylinder, and fixing the end plate of the lower end of the upper cylinder and the end plate of the upper end of the lower cylinder. , When aligning the axial centers of the upper cylinder and the lower cylinder, at least two screw holes for tension line tension remaining in the end plate of the upper cylinder or the lower cylinder are respectively attached to the positioning pins. The base end of the screw tooth is screwed together, and the tip end of each positioning pin protruding to the end plate of the upper cylinder or the lower cylinder is respectively
A method for connecting a concrete cylindrical body, characterized in that the concrete cylindrical body is fitted into a screw hole for tension line tension remaining on an end plate of the other cylindrical body. 3. A lower pole and an upper pole made of prestressed concrete are arranged in a straight line, and an end plate at the upper end of the lower pole and an end plate at the lower end of the upper pole face each other, and Place the row of scaffolding bolt holes and the row of scaffolding bolt holes on the outer surface of the lower pole on the same line so that the axis of the upper pole matches the axis of the lower pole, and In the method of connecting the concrete cylinder that fixes the end plate and the upper end plate of the lower pole, the rows of scaffolding bolt holes for the upper pole and the lower pole are arranged on the same line and the upper pole and the lower pole are When aligning the shaft centers, at least two screw holes for tension wire remaining in the end plate of the upper pole or the lower pole are respectively screwed with the screw pin base end portions of the positioning pins, and the upper pole is screwed. Or on the end plate of the lower pole The tips of the positioning pins out, respectively,
A method for connecting a concrete cylinder, characterized by fitting into a screw hole for tension line tension remaining on the end plate of the other pole.