JP3217751B2 - Formwork plate for forming concrete pile riser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork plate for forming a concrete pile standing portion for forming a foundation concrete pile in a vertical hole formed in the ground.

[0002]

2. Description of the Related Art Conventionally, when a foundation concrete pile is formed in a vertical hole formed in the ground, construction has been carried out as shown in FIGS. First, as shown in FIG. 5, a steel pipe P is press-fitted to a predetermined depth in the ground by a steel pipe press-in / draw-out device A at a predetermined position. The steel pipe press-in / pull-out device A includes a base portion 11 having an opening at the center portion through which the steel pipe P can penetrate, a lifting portion 12 also having an opening portion at the center portion through which the steel pipe P can pass, Elevating means 13 which is erected at a plurality of locations and elevates the elevating part 12;
For example, a well-known device including a hydraulic cylinder and a tightening band 14 that is supported by the elevating unit 12, moves up and down integrally therewith, tightens the outer peripheral portion of the steel pipe P, and is formed so as to release the tightening. is there. When the press-fitting of the steel pipe P is completed, earth and sand, crushed stones, and the like in the steel pipe P are removed by a well-known digging device (not shown).

When the earth and sand and crushed stones in the steel pipe P are removed,
As shown in FIG. 6, the steel pipe P
Is poured and ready-mixed concrete C is poured into the steel pipe P. Further, as shown in FIG. 7, the steel pipe P is completely pulled out from the ground, and the vertical hole remaining after the steel pipe P is drawn is backfilled with fresh concrete C except for a part of the upper end portion. Then, as shown in FIG. 8, so as to surround the opening of the vertical hole,
A cylindrical body 15 is erected perpendicularly to the ground, and a fresh concrete C is further poured on the fresh concrete C in the vertical hole, and a concrete pile 17 is formed with a rising portion 16 on the ground. Has been done.

[0004]

In the above-mentioned conventional operation for forming a concrete pile for foundation, the casting of fresh concrete C is temporarily interrupted in order to form the rising portion 16.
The steel pipe press-in / pull-out device A is separated from the vertical hole,
Must be restarted after standing on the ground so as to surround the opening of the vertical hole.

Further, in order to temporarily suspend the placing of the ready-mixed concrete C at the time of forming the rising portion 16 and then resume the placing of the ready-mixed concrete C, as shown in FIG. There is also a problem that the seam 18 of the concrete C before and after the restart is formed at the upper portion, and the strength of the concrete pile 17 is reduced. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has been made to improve the workability of forming a concrete pile for foundation and to improve the strength of the concrete pile as a seamless concrete pile. An object of the present invention is to provide a mold plate for forming a rising portion.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention removes earth and sand and crushed stones in a steel pipe pressed into the ground by a steel pipe press-in / draw-out device, and then pulls out the steel pipe. The concrete for foundation is formed by pouring ready-mixed concrete into this steel pipe and filling the vertical holes remaining after drawing out the steel pipe with fresh concrete, and finally providing a rising part that projects beyond the ground level. The pile has an opening through which the rising portion penetrates, and a support plate member on which the steel pipe press-fitting / pulling-out device is placed during the forming operation; and a support plate member standing upright at the opening, and Prior to the formation of the concrete piles, a tubular body was vertically arranged in advance at a position where the rising portion was to be formed, and was a formwork when the rising portion was formed.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show a concrete pile forming method using the concrete pile rising part forming mold plate 1 according to the present invention. Parts common to the respective parts of the apparatus shown in FIGS. The same numbers are assigned and the description is omitted. The formwork plate 1 has an opening 2 through which the rising portion 16 of the concrete pile 17 for foundation penetrates, a support plate member 3 on which a steel pipe press-in / draw-out device A is placed during a concrete pile forming operation, and an opening 2.
The tube which is set up on the support plate member 3 and is vertically arranged in advance at a position where the rising portion 16 is to be formed before the concrete pile forming operation, and serves as a formwork when the rising portion 16 is formed. And the body 4.

Hereinafter, the method shown in FIGS. 1 to 4 will be described. First, as shown in FIG. 1, the form plate 1 is placed on the ground by aligning the tubular body 4 with a position where the rising portion 16 is to be formed. Subsequently, after the steel pipe press-in / draw-out device A is placed on the form plate 1 arranged at a predetermined position as shown in FIG. 2, the steel pipe P is press-fitted to a predetermined depth in the ground. The earth and sand and crushed stones in the steel pipe P are removed by a digging device. When the removal of the earth and sand and crushed stones in the steel pipe P is completed, the fresh concrete C is poured into the steel pipe P while the steel pipe P is pulled out by the steel pipe press-in / draw-out device A as shown in FIG. Subsequently, as shown in FIG. 4, the steel pipe P is completely pulled out from the ground, and fresh concrete C is poured into the cylindrical body 4.

After the ready-mixed concrete C is sufficiently solidified, the form plate 1 is removed from this portion, and the rising portion 16 is formed.
The operation of forming the concrete pile 17 having the above is completed. As described above, by using the form plate 1, the work of forming the concrete pile 17 can be continuously performed without interruption including the formation of the rising portion 16.
Its workability is improved. In addition, since the concrete placement is continued from the start of the operation to the completion of the operation, no seam is formed on the concrete pile 17 due to a difference in solidification time, and the strength of the concrete pile 17 is improved.

[0010]

As is apparent from the above description, according to the present invention, after removing sediment and crushed stones in a steel pipe pressed into the ground by a steel pipe press-in / draw-out device, the steel pipe is pulled out while removing the same. A concrete pile for foundation formed by pouring ready-mixed concrete into a steel pipe and filling the vertical hole remaining after the steel pipe is drawn out with fresh concrete, and finally providing a rising part that protrudes beyond the ground level The rising portion has an opening therethrough, and a support plate member on which the steel pipe press-fitting / pulling-out device is placed during the forming operation; and a support plate member standing upright at the opening portion, and Prior to the formation of the concrete pile, the pipe is vertically arranged at a position where the rising section is to be formed, and is a tubular body that forms a form when the rising section is formed.

Therefore, there is an effect that the workability of forming the foundation concrete pile is improved, and the strength of the seamless concrete pile can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first step in a concrete pile forming method using a concrete pile rising section forming mold plate according to the present invention.

FIG. 2 is a view showing a second step in the concrete pile forming method using the concrete pile rising part forming mold plate according to the present invention.

FIG. 3 is a view showing a third step in the concrete pile forming method using the concrete pile rising part forming form plate according to the present invention.

FIG. 4 is a diagram showing a fourth step in the concrete pile forming method using the concrete pile rising part forming mold plate according to the present invention.

FIG. 5 is a view showing a first step in a conventional concrete pile forming method.

FIG. 6 is a view showing a second step in a conventional concrete pile forming method.

FIG. 7 is a view showing a third step in a conventional concrete pile forming method.

FIG. 8 is a view showing a fourth step in a conventional concrete pile forming method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Form plate 2 Opening part 3 Support plate member 4 Cylindrical body 16 Stand-up part 17 Concrete pile A Steel pipe press-in / pull-out device P Steel pipe C Ready-mixed concrete

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 13/04

Claims (1)

(57) [Claims] 1. After removing earth and sand and crushed stones in a steel pipe pressed into the ground by a steel pipe press-in / draw-out device, while pulling out the steel pipe, placing ready-mixed concrete into the steel pipe and pulling out the steel pipe Along with backfilling the remaining vertical hole with ready-mixed concrete, finally having an opening through which the rising portion of the concrete pile for foundation formed by providing a rising portion projecting beyond the ground level, A support plate member on which the steel pipe press-in and pull-out device is placed during the forming operation, and the support plate member is erected at the opening to form the rising portion before forming the foundation concrete pile. And a tubular body that is vertically arranged in advance at a position where the rising portion is to be formed and serves as a mold when forming the rising portion.