JPS61233116A - Concrete pile and its settling cap - Google Patents

Abstract

PURPOSE:To eliminate the needs for chipping operation by projecting one end of a reinforcement material to be buried in a concrete pile as the connecting part to be connected with the footing from the upper end of the pile in forming the concrete pile. CONSTITUTION:One end of a reinforcement material 4 to be buried in a concrete pile 1 as a connecting part 4a to be connected with the footing is projected from the upper end of the pile 1 in forming the pile 1. The connecting part 4a of the pile 1 is inserted into the space formed by the inner and outer cylinders 7 and 8 of a cap 6 for settlement and the cap 6 is put on the upper end of the pile 1. A weight 14 for penetrating the pile 1 is connected to the cap 6 by a wire 16 coupled with the hook 12 of a weight-placing portion 9 fixed to the cap 6 for penetrating the pile 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a concrete pile and a cap for sinking the same. This paper proposes a concrete pile that can eliminate the pre-work required in the process, and a cap for sinking the concrete pile, which is necessary for the work of sinking the concrete pile.

Conventional technology The connection between a concrete pile and a 7-ticket part in a civil engineering structure is carried out by connecting the reinforcing bars of the foundation part to the reinforcing bars installed inside the concrete pile.
After setting a shaped concrete pile with reinforcing bars embedded in the concrete body, the upper concrete part is chipped off to expose the reinforcing bars from the upper end of the concrete pile, and this exposed part is used as the footing part. A method of connecting to reinforcing bars is used. Since the above-mentioned chiseling work is done manually, it requires a long working time, and in particular, since only a few high-strength concrete piles can be chipped at a time, the work cost increases and is uneconomical.

Additionally, there is a problem that cracks may occur in the concrete plate during chiseling work.

Problems to be Solved by the Invention The present invention aims to eliminate the need for hewing work after the concrete pile is sunk by making reinforcing bars protrude from the ends when building the concrete pile. In addition, we have proposed a cap for sinking the concrete pile of the present invention, which allows a weight for press-fitting the pile to be loaded onto the upper end of the concrete pile, thereby making it possible to sink the concrete pile efficiently.

Alternative Means for Solving the Problems In order to solve the above problems, the present invention has taken the following technical means.

In other words, the reinforcing bars (
A concrete pile characterized in that one end of 4) is made to protrude from the upper end of the concrete pile (1) at the time of modeling as a joint part (4a) to be joined to the footing part, and , a submergence cap (6) whose lower end (-1) is brought into contact with the upper end of the concrete pile (1), and a reinforcing bar (4) protruding from the upper end of the concrete pile (1). This is a sinking cap characterized in that a pile press-fitting weight placement 5 (9) is formed above the joint part (4al) and near the top thereof.

Since the joint part (4a) of the reinforcing bar (4) is shaped so as to protrude from the upper end of the working concrete pile (1), the concrete pile (1) is sunk and the joint part (4a) is connected to the footing. For example, it can be directly connected to the reinforcing material in the concrete section, eliminating the need for chipping of the concrete section.

In addition, the sinking cap (6) is attached to the joint part (4a) of the reinforcing bar (4) protruding from the upper end of the concrete HA (11).
) (14 tJf can be placed on the anti-press-fitting weight mounting part (9) provided beyond the concrete pile (1), and the lower end Ql contacts the upper end of the concrete pile (1), so the connection part (4a) The dead weight of the pile press-fitting weight a4) can be applied to the concrete pile (1) without interfering with the concrete pile (1), and the sinking work can be carried out efficiently.

Example Next, one embodiment of the present invention will be explained based on the drawings.

Figure 1 (A) shows a cutaway front view of the main part of the concrete pile (1), and Figure 1 (A) shows a plan view of the main part of the concrete pile (1).
Connect reinforcing bars (2), (2)..., spiral bars (3), and reinforcing bars C4), (4)... to one end of each reinforcing bar 14). As part (4a), ring muscles C5) are fixed to these at appropriate locations to form a joint part (4a).
After modeling, form a reinforcing bar basket (■) in which the joint part (4a) protrudes outward from the upper end of the concrete pile (11), Insert concrete into concrete piles, perform shaping work using centrifugal compaction, etc., and form concrete piles of 111% -
Leave a legacy. The protruding length of the protruding coupling portion (4a) is set to be sufficient for coupling to the reinforcing bars (not shown) of the footing portion.

As shown in Figure 2 (A) as a longitudinal front view and as shown in Figure 2 (mouth IK and arrow view), the cap for sinking (6) is shown as an example.
In this method, a hollow, substantially cylindrical cylinder (7) and an outer cylinder (8) are arranged concentrically, and an anti-press-fitting weight mounting part (9) formed of a thick plate is fixed at the upper end. The lower end Qol of the cap (6) is stepped, with the lower end of the cylinder (7) having a smaller diameter than the upper part, and the lower end of the outer cylinder (8) having a larger diameter than the upper part. The press-fitting weight placement part (9) has a hole (
11) and hook f17J13G- respectively provided, inner cylinder C7
), soil removal holes a1J are provided in the upper part of each of the outer cylinders (8),
As shown in Fig. 3, a vertical front view in the submerged state,
The lower end Q1 of the submerged cap 16) can be fitted to the upper end of the concrete pile (1) without too much play.
The hole (111 and the cylinder (7) can be seen into the gap between the hole (111) and the cylinder (7) by placing the pile press-fitting weight (14) on the pile press-fitting weight part (9). Through this, the auger can be inserted into the hole tlt9 of the concrete pile C1), and the soil excavated by the auger (+5)K is discharged from the soil removal hole (13) into the soil removal hopper (not shown). The submersion cap (6) is constructed so as to

The pile press-fitting weight I is coupled to the sinking cap (6) by a wire ue hooked to the hook t13.

Further, the symbol aη is an end plate fixed to the end of the concrete pile (1). Instead of the cylinder (7) and the outer cylinder (8), a stay with sufficient rigidity is used to support the anti-press fit weight placement part (
9) and the lower end αI may be used, and it is not limited to the illustrated example.

Effects of the Invention The concrete pile and its sinking cap according to the present invention are constructed as described above, and the concrete pile (
1) The connection to be connected to the footing, which is one end of the reinforcing bar (4) buried inside! ! 6 (4a), since it is made to protrude from the upper end of the concrete pile (1) during modeling, the concrete pile is sunk and the connecting part (4a) of the reinforcing bar (4) is connected to the footing part, for example. Since it can be directly connected to the reinforcing bars, it is possible to completely eliminate the trouble of removing the concrete parts (which was required in the case of conventional concrete piles), reducing work time and greatly reducing labor. It became effective.

In addition, since hacking work is not required, concrete piles (1
) There is no longer any fear of cracking caused by K-hacking. By using the sinking cap (6), the concrete pile (1) is not disturbed by the joint (4a) of the reinforcing bar (4) protruding from the upper end of the concrete pile (1). Pile press-fitting weight I
was able to be placed on the pile press-fitting weight placement part (9), and the sinking work was carried out efficiently.

[Brief explanation of the drawing]

The figures show one embodiment of this invention. Figure @1 (A) is a cutaway front view of the main part of a concrete pile, Figure 91 (B) is a plan view of Figure @1 (A), and wX2 (A) is a submerged concrete pile. Figure 2 (b) is a vertical cross-sectional front view of the cap for
The figure is a longitudinal sectional front view in the submerged state. Description of symbols (1)... Concrete pile (4)... Reinforcement bar (4a)... Connection part (6)... Cap for sinking (9)... Weight placement part a1 for pile press-fitting ...lower end patent applicant: Nippon Concrete Industry Co., Ltd. agent, patent attorney Takayoshi Hayashi Figure 1 (a) Figure 1 (a) (Rof

Claims (2)

[Claims] (1) A concrete pile characterized in that one end of the reinforcing bar buried in the concrete pile is made to protrude from the upper end of the concrete pile during shaping, as a joint part to be joined to the footing part. . (2) A sinking cap whose lower end is brought into contact with the upper end of the concrete pile, and a pile press-fit weight that extends above and near the joint of reinforcing bars that protrudes from the upper end of the concrete pile. A cap for submersion characterized by having a placement part formed therein.