JPH0449249Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to concrete piles, and in particular, in the footing part of the concrete pile, it facilitates the work of chipping away the concrete in the area, and The present invention relates to a concrete pile that facilitates transportation and other handling of the concrete pile.

[Problems to be solved by conventional techniques and ideas]

As a conventional concrete pile of this type, one disclosed in Japanese Patent Application Laid-Open No. 61-233116 filed by the applicant of the present application is known. If this is explained according to FIG. 5, reinforcing reinforcing bars 2, 2, . . . are provided to protrude upward from the upper end of the concrete pile 1. The reinforcing reinforcing bars 2, 2, etc. of this surprising part correspond to a so-called footing part, and although not shown in the drawings, in order to connect to the reinforcing bars of the footing part, the reinforcing bars 2, 2, etc. correspond to the so-called footing part in advance during manufacturing. This was an attempt to eliminate the need for chipping by removing the concrete pouring part. However, although this can completely eliminate the need for chiseling at the site, since the reinforcing reinforcing bars 2, 2... protrude above the concrete pile 1, transportation and other handling are not easy, and Construction may be dangerous and requires the use of special jigs.

Also, the patent application filed in 1986 by the applicant
No. 52090 idea exists. As shown in FIG. 6, a partition plate 4 having approximately the same cross-sectional shape as the end metal fitting 3 is provided at a predetermined distance from the end metal fitting 3 fixed to the upper end surface of the concrete pile 1.
The PC steel wires 5, 5... and reinforcing reinforcing bars 2, 2... are penetrated and shaped by centrifugal compaction or the like.

Since the partition plate 4 is inserted into the lower end surface of the part to be chiseled, it is easy to separate it from the main body part (the part that will not be chiseled), but it takes a considerable amount of time to chise the concrete. Therefore, there were defects such as high cost.

Therefore, technical problems arise that must be solved in order to overcome the above-mentioned deficiencies.

[Means for solving the problem] This invention was proposed in order to solve the problem mentioned above, and it involves concrete pouring on the outer side of the reinforcing steel at the footing section provided at the upper part of the concrete pile. It is an object of the present invention to provide a concrete pile characterized in that a concave portion is omitted and a circumferential groove is formed therein.

[Effect]

This idea is the footing part of the upper part of the concrete pile, and since a circumferential groove is formed on the outside of the reinforcing reinforcing bars buried at the relevant position, the thickness of the concrete wall at the part to be chipped is reduced. The cutting time is about half of the normal amount, and since there is no concrete around the outer periphery of the reinforcing bars, the time required for cutting is shortened accordingly. Of course, if a separating agent or a sheath is applied to the reinforcing reinforcing bars to separate them from the concrete, there will be no adhesion between the reinforcing bars and the concrete when chipping, and the reinforcing bars can be easily cut. Since the pile is fixed by concrete equivalent to the inner wall, it is easy to transport and handle in the same way as ordinary concrete piles.

〔Example〕

An embodiment of this invention will be described below in detail with reference to the accompanying drawings. Fig. 3 is a vertical cross-sectional view of a concrete pile according to an embodiment of the present invention, and in this figure, the upper part of the pile 10 corresponds to the joint part (footing part) with the reinforcing bars of the foundation structure. . Then,
The concrete corresponding to the outer side of this part, that is, the outer side of the reinforcing bars 11, is removed, and a groove 12 with a circumferential cross section whose bottom surface is the outer side of the reinforcing bars 11, 11, . . . is formed. Although it is possible to form the groove 12 at the bottom of the groove 12 to such an extent that substantially the outer surfaces of the reinforcing reinforcing bars 11, 11... are exposed, the groove 12 should not be limited to this. .

In addition, 13 is an end plate, and the groove 12 provided in the lower part of this end plate corresponds to the part to be chipped. The reinforcing reinforcing bars 11, 11 are arranged to approximately the same position as the end plate 13, and the ends of the PC steel materials 15, 15 are locked to the end plate 13, and a spiral bar 16 is wound around the entire length excluding the recess. The reinforcing reinforcing steel pipes (not shown) are twisted and braided, and the reinforcing reinforcing bars 11,
A protrusion (not shown) having the same height as the depth of the circumferential surface formed on the outer surface of 11... is fixed to the formwork with bolts, the reinforcing reinforcing bar cage is inserted into this formwork, and Concrete piles are manufactured by this method. Thereafter, this concrete pile is transported to the construction site, and after the construction is completed, the concrete in the groove 12 portion is chipped off. At this time, since the concave groove 12 is formed, the wall thickness is approximately half that of a normal concrete pile wall thickness, making chiseling work extremely easy. Furthermore, since the concrete to be removed exists only on the inside of the reinforcing bars, there is no fear that the pile body 10 will be cracked during chipping. In addition, a partition plate is provided at the boundary between the part to be chipped and the pile body 10 as shown in FIG.
It is possible to install a separating agent or sheath to break the adhesion with concrete. By providing these, the above-mentioned chiseling work is made easier. In this way, as shown in Fig. 4, the reinforcing reinforcing bars 11, 11... and the PC
Only the steel members 15, 15... are installed protruding from the top of the pile body, and after removing the end plate 13, they are combined with the reinforcing bars of the footing, and concrete is poured to form the foundation structure. .

[Effect of idea]

In this invention, as explained in detail in the above embodiment, the concrete of the part of the concrete pile to be chipped is manufactured without even the peripheral surface formed by the outer surface of the reinforcing reinforcing bar during manufacturing.
The thickness of the concrete wall in this area is about half of the normal thickness, making chiseling work extremely easy and reducing work time. Unlike those with a more protruding structure, they are easier to handle during manufacturing and transportation. In addition, it can be constructed using ordinary jigs, making it a truly valuable invention with various practical uses.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention,
Figure 1 is a cutaway front view of a part of the main part of the concrete pile, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, Figure 3 is a cross-sectional view taken along line B-B in Figure 2, and Figure 4 is a chiseled view. It is a slope view when taken. Further, FIGS. 5 and 6 are partially cutaway longitudinal sectional front views of the conventional type. Explanation of symbols, 10... Pile, 11... Reinforcement bar, 12... Concave groove, 13... End plate.

Claims (1)

[Scope of utility model registration request] A concrete pile characterized in that the concrete casting part on the outside of the reinforcing reinforcing bars in the footing part provided in the upper part of the concrete pile is removed, and a circumferential groove is formed in this part.