JPS60125605A - Hollow concrete pile and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a foundation pile which is a device and is used for extremely strong construction, etc., and its main purpose is to easily and reliably form a hollow part in the central part of the axis of a pile column. - It is possible to obtain an economical effect by removing the mold core tube used during the forming and not having to reuse it.

Most foundation shafts for construction during water flow and ground improvement are manufactured by centrifugal force production. In the case of centrifugal force production, the concrete material to be filled into the formwork is Because of the high-speed rotation, a hollow hole can be naturally formed in the shaft core of the pile, but on the other hand, due to the filling material such as concrete, the material separates and coarse particles accumulate on the outer circumferential surface of the shaft. As a result, the anti-core part becomes rough, especially the hollow hole that can be drilled is made of a soft material and is distorted and deformed.
Therefore, when using the above-mentioned antibody produced by centrifugal force, mechanical problems such as breakage and cracking occurred at zero.

In view of the above-mentioned dimensions, the present invention completely eliminates various defects such as uneven wall thickness and particle separation by inserting a core tube of an appropriate diameter into the antibody axis during VL molding. In addition, the core pipe can be easily removed and the core pipe can be reused to provide an inexpensive and light-weight hollow concrete shaft.

That is, 1. The fourth aspect of the present invention is to remove the core tube from the concrete shaft, which is formed by inserting a core tube, which is entirely covered with a mold release material, into the shaft core of the pile column, and then insert the core tube into the shaft core of the pile column. This invention relates to a hollow concrete shaft having hollow holes formed therein and a manufacturing method thereof.

Below, a specific example of the present invention will be explained in detail with reference to the drawings. A core made by covering 4I-shaped material (3) in advance! (2) Charge and arrange.

For the core tube (2), use a resin pipe such as a Kinmei vibe such as @tube or a resin pipe with appropriate wall thickness and diameter, and @shape material (3).
) - Silver paper that is easy to peel off 1 Synthetic resin, wax paper, or foamed and fully laminated paper on the entire surface, coating with paint, etc. can be used as desired.0 Note: Formwork for core f(2) ( 1) Insert a reinforced mirror (4) as a means of fixation inside the shaft, and support it on the inside shaft.
+ 6 methods, and the holding part (1)' on the side formwork (1) [:i should not be specified (8.

The present invention is based on the above 0. n <Advance +! III shape material (3)
The core '# (2), which is fully covered with Of course, the pile pillar r on the side of the P and A pits is also easy to use.
It is possible to create @Km.

Thus manufactured core pipe of trZ thin concrete shaft (2)
Hold the @ part of the inkstone, and attach the inkstone to the core tube (
2) Since the outer circumferential surface of the core tube (2) has been applied with type 4 VI (3) in advance by extracting it to the outside, it can be easily removed to open I-1. Needless to say, it is also possible to repeat the operation of the core tube (2).

In addition, depending on the diameter of the core pipe (2), it is possible to select a hollow hole that can freely control the pressure. The hollow hole is always reliably drilled at the center of the shaft base of the pile column,
Since the wall thickness a is constant across the entire length of the top and bottom, and since it is hollow, it has great effects such as 1 stiffness and 1 stiffness.

[Brief explanation of drawings]

Figure 1 shows a longitudinal cross-section of a conventionally manufactured concrete 17-hole shaft. Figure 2 shows the improvement of the concrete resistance of the present invention. FIG. 3 is a sectional view showing the manufacturing structure. Explanation of symbols: (1) Formwork, (2) Core'f- (3)@form material, (4) Rebar cage patent applicant Teruo Koi, 'IC,

Claims (2)

[Claims] (1) A hollow hole was formed in the pile shaft core by inserting a core pipe into the shaft core of the fjL pillar and removing the core pipe. lol
Hollow concrete concrete [. (2) When forming concrete reinforcement using appropriate formwork,
A hollow hole is created in the center of the pile column axis by inserting a core tube whose circumferential surface is entirely coated with a release material and removing the core tube after the concrete has hardened. A method of manufacturing a formed hollow concrete shaft.