JP2937770B2 - Spacer for core material of cast-in-place pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a core material such as a steel cage,
The present invention relates to a core spacer for a cast-in-place pile inserted into a drilled hole.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 (a), 4 (b), and 4 (c), both ends of a spacer are welded and attached to a core material. Installation took time.

[0003]

In a cast-in-place pile, a core material such as a reinforced cage is inserted into a drilled hole for reinforcement. However, in order to obtain a required fire resistance, durability, and structural strength, a certain strength is required. Fog must be secured. For this reason, spacers are attached to the outer periphery of the core material, but handling is troublesome due to the welded structure at both ends, and when the core material is made of tempered steel,
There is a possibility that the characteristics may be impaired.

The present invention has been devised so that it can be easily attached to a core material without using welding.

[0005]

According to the first aspect of the present invention, there is provided a swollen portion formed by bending a strip-shaped plate into a mountain shape, and a space at both ends of the strip-shaped plate.
A bulge for locking to the crosspiece that constitutes the core of the pile
Consisting of a U-shaped part bent toward the inside of the
At least one of the U-shaped parts should have a cross member that forms the core of the pile.
Do not screw the bolt to pinch it from outside the bulge.
A cast-in-place core spacer piles characterized by Rukoto.

According to a second aspect of the present invention, there is provided a bulge formed by bending a band-shaped plate into a mountain shape , and a core member of a cast-in-place pile at both ends of the band-shaped plate.
To the side of the bulge to lock to the formed vertical member
It comprises a U-shaped portion that opens, and at least the U-shaped portion
On the other hand, a bobbin for holding the vertical member that constitutes the core of the pile
It is a spacer for a core material of a cast-in-place pile, which is formed by screwing a bolt from above the bulging portion .

[0007]

FIG. 1 shows an example of a spacer according to the present invention.
(A) is to form a U-shaped groove at both ends by bending a steel strip in a chevron shape.
The nut 2 is welded to the upper part of one end of the groove, and the bolt 2 'is screwed. The nut may be welded to the U-grooves at both ends. (B) is to form a U-shaped groove at both ends of the strip-shaped steel plate bent into an angle, and to form a female screw at the upper part of the U-shape, or to weld the nut 2 to the bolt. This is an example in which 2 'is screwed. The internal thread may be formed only at one end.

An embodiment will be described below with reference to the drawings. FIG. 2 is a detailed view of the mounting state of the spacer. FIG. 2 (a)
It is to lock the inserted vertical line 5 and cage-like core member 3 of the spiral muscle 4 in the spacer 1 U end of the groove comprising a spiral muscle 4 in drilling, pinching the lower spiral muscle 4 on the other hand Then, while holding the space with the sleeve 6, the held helical muscle is clamped with the bolt 2 '. An example of the entire embodiment is shown in FIG. The spacer 1 is used by evenly circling the upper and lower outer peripheries of the reinforced cage core 3. The hoop muscle 4 'may be used instead of the spiral muscle.

FIG. 2B shows the upper and lower U-shape of the spacer 1 ′.
The vertical streak 5 is sandwiched in the groove of the shape , and the bolt 2 '
To secure a space with the spacer 6. An example of the entire embodiment is shown in FIG. In addition, the spacer 1 'is used by evenly circling the upper and lower outer peripheries of the reinforced cage core material.

According to the present invention, the spacers 1 and 1 'can be attached without the need for welding equipment by simply pressing the bolt 2' without welding work, so that the handling is simple and the heat treatment is performed by welding heat. There is no change in properties such as steel.

[Brief description of the drawings]

FIG. 1A shows an example of a spacer according to the first aspect of the present invention.
FIG. (B) is a diagram showing an example of the spacer of the invention of claim 2;
is there.

FIG. 2 (a) is a detailed view of the embodiment of FIG. 1 (a). (B) is a detailed view of the embodiment of FIG. 1 (b).

3 (a) is an overall view of the embodiment of FIG. 1 (a), (b) is an overall view of the embodiment of FIG. 1 (b), (c) is FIG. 2 (a) FIG.

FIGS. 4A, 4B, and 4C are examples of a conventional spacer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spacer, 1 '... Spacer, 2 ... Nut, 2' ... Bolt, 3 ... Reinforcing cage, 4 ... Spiral bar, 4 '... Hoop bar, 5 ... vertical bars, 6 ... sleeves, 7 ... reinforcement bars

Claims (2)

(57) [Claims] A swollen portion formed by bending a band-shaped plate material into a mountain shape;
At both ends of the band-shaped plate, cross members constituting the core of the cast-in-place pile
Bent toward the inside of the bulge to lock
A U-shaped part, at least one of the U-shaped parts,
Expand the bolts to hold the cross members that constitute the core of the pile.
A core spacer for a cast-in-place pile, which is screwed from the outside of the protrusion . 2. A bulge formed by bending a band-shaped plate into an angle,
A longitudinal member constituting a core of a cast-in-place pile at both ends of the band-shaped plate member
To open to the side of the bulge
And at least one of the U-shaped portions,
Bulging bolts to hold the vertical members of the core material
A spacer for a core of a cast-in-place pile, which is screwed from above the part .