JPH0510528U - Steel tube concrete composite pile - Google Patents

Abstract

(57) [Abstract] [Purpose] After the foundation pile construction, at the time of chipping work, the cutoff work of the cutoff part of the steel pipe is facilitated, and the workability of the reinforcing bar set for footing connection is improved, and the cost is reduced. To contribute to. [Structure] In the steel pipe-concrete composite pile 1, the cutoff portion of the steel pipe 2 is cut off in advance. Then, the thin steel pipe 4 is connected to the cut-off portion. Alternatively, the concrete 3 is cast and integrated without connecting the thin steel pipes. At this time, the reinforcing reinforcing bars 5, 5 ... For footing connection are welded and fixed to the inner surface of the upper portion of the steel pipe 2,
The upper end portion is projected up to near the cutoff.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a steel pipe-concrete composite pile, and particularly to a steel pipe core pile. After constructing a concrete pile as a foundation pile, cut off the foundation pile head and pile Reinforcing piles for footing and piles installed in the main body are taken out and footing is performed. A steel pipe core that is used as a reinforcing bar for connection and facilitates cut-off work of the foundation pile head. The present invention relates to a composite pile.

[0002]

[Prior art]

  Conventionally, a steel pipe is used as an outer shell, concrete is placed in the steel pipe, and centrifugal force molding is performed. Solidified steel tube-concrete composite piles are known, and this steel tube concrete Reed composite pile is widely used in the fields of construction and civil engineering.   Then, after the steel pipe concrete pile is constructed as a foundation pile, the steel pipe concrete pile is The area near the head of the cleat pile is a ground After cutting the board, it is cut off. At this time, the part corresponding to the cutoff of the steel pipe Is cut using a cutting machine and the concrete part is also chipped. Then steel pipe Welding reinforcement bars for footing connection to the outer periphery of the Joint work is performed. Also, if the pile is installed in place, the cut-off of the pile head is Not to be missed, but there is a similar work process.

[0003]

[Problems to be solved by the device]

  The conventional steel pipe-concrete composite pile has a relatively large thickness as an outer shell. Is used, the cut-off part of the steel pipe is cut during the chipping work. Therefore, it takes a lot of time and the work efficiency decreases. Therefore, the cause of cost increase Becomes Moreover, conventionally, after the chiseling work is completed, the reinforcing bars for footing connection are connected. Welding reinforcing reinforcement for footing connection to the outer surface of the cut-off steel pipe Since it was there, the workability was extremely poor.

[0004]   Therefore, after the foundation pile construction, the cut-off portion of the steel pipe cut-off portion is to be used during chipping work. Facilitates work and improves the workability of assembling the reinforcing reinforcing bar for footing connection. Solution to obtain a steel pipe-concrete composite pile that can also contribute to cost reduction There is a technical problem to be solved, and the present invention aims to solve the problem. To aim.

[0005]

[Means for Solving the Problems]

  This invention has been proposed in order to achieve the above-mentioned object. Steel pipe concrete composite part A thin steel pipe is connected to the cutoff portion of the steel pipe, and Reinforcing reinforcing bars for footing connection are welded to the inner surface and the upper part is approximately the upper end of the thin steel pipe. Steel pipe-concrete composite pile formed by projecting up to near For steel pipe-concrete composite piles in which cleats are placed and centrifugally molded to integrate them. The steel pipe does not have a portion corresponding to the cutoff of the steel pipe, and the inner surface of the steel pipe is Weld the reinforcing bars and project the upper part up to near the upper end of the cutoff part of the steel pipe. The present invention is to provide a steel pipe-concrete composite pile characterized by the above.

[0006]

[Action]

  The steel pipe-concrete composite pile of the present invention is used as a foundation pile for chipping after construction. In the invention according to claim 1, the thin steel pipe is melted to the upper end of the steel pipe at the cut-off portion. The cutoff is provided by means of contacting or the like. Since there is no steel pipe in a considerable part and it is a concrete part, the cutoff is a conventional steel pipe. This is extremely easy compared to the above, and therefore, the hull near the head of the steel tube-concrete composite pile is The work of picking is also easy.

[0007]   Thus, when the chiseling work is completed, the chiseled portion is on the inner surface of the steel pipe. Reinforced reinforcing bar for footing connection that is welded is protruding, so it is a supplement for footing. The strong rebar can be easily joined to the reinforcing rebar for the footing connection. The workability of connecting the pile with the pile is improved.

[0008]

【Example】

  An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 Fig. 1 shows an embodiment according to claim 1, and Fig. 1 is a partially cutaway vertical front view before cutoff. Figure 2 is a partially cutaway vertical front view after cutoff. In the figure, 1 is steel pipe concrete 1 shows a composite pile. The composite pile 1 is made by placing concrete 3 on the inner surface of a steel pipe 2. However, the steel pipe 2 is pre-formed before the centrifugal force forming. Therefore, a thin steel pipe 4 is connected to the cut-off portion H by means such as welding, and further, Reinforcing reinforcing bars 5, 5, ... For welding footings are welded to the inner surface of the upper portion of the steel pipe 2. The upper end of the reinforcing reinforcing bars 5, 5 ... for the footing connection is the upper end of the cut-off portion H. Near the section.

[0009]   Therefore, the steel pipe 2 as the outer shell has a relatively large thickness due to the design strength of the composite pile 1. However, in comparison with this, the thin steel pipe 4 is extremely thin and Therefore, the work of cutoff becomes easy.   Thus, the steel pipe 2, the thin steel pipe 4, the reinforcing reinforcing bars 5, 5 ... Are integrated into a mold (not shown) as a unit, and the concrete Steel pipe-concrete composite pile 1 of the present invention by placing the torch 3 and integrating by centrifugal force molding Is molded.

[0010]   3 and 4 show an embodiment of the invention according to claim 2, and FIG. 3 shows a cutoff. FIG. 4 is a partially cutaway vertical front view before the cut-off, and FIG. 4 is a partially cutaway vertical front view after the cutoff. This The invention is substantially the same as the invention according to claim 1, so that the target parts are the same. The description will be omitted by using the reference numerals. The only difference is that the device of claim 1 is cut off. The thin steel pipe 4 is connected to the frame portion H by means such as welding, while the thin steel pipe 4 is connected to the hollow portion H according to claim 2. In the embodiment shown in FIGS. 3 and 4, the thin steel pipe 4 is not provided. Therefore, the concrete 3 is exposed and integrally molded at the cut-off portion H.

[0011]   Since one embodiment of the present invention has a structure as described above, the composite pile 1 of the present invention When the head is chipped after being constructed as a foundation pile and then it is connected to the foundation of the structure , A thin steel pipe 4 is connected to the head of the foundation pile, that is, the cut-off portion. Therefore, the cut-off of the thin steel pipe 4 becomes extremely easy. Also, FIG. 3 and FIG. In the embodiment described in No. 4, since there is no thin steel pipe 4 itself, the cutting work of the steel pipe 2 or 4 is also performed. It becomes unnecessary. In this way, 3 parts of concrete are chipped and footing is joined. By exposing the reinforcing bars for reinforcement 5, 5, ... It becomes easy.

[0012]   This device can be modified in various ways without departing from the spirit of the device. And, of course, this invention extends to the modified version.

[0013]

[Effect of device]

  In this invention, as described in detail in the above-mentioned one embodiment, the outer shell steel pipe of the cutoff portion is made thin. Since it is a plate steel pipe, it can be easily cut, and the footing connection auxiliary is Since the reinforcing bars are embedded by welding, the outer peripheral portion of the outer shell steel pipe is cut off after the pile is cut off. There is no need to weld reinforcing bars for footing connection to. Therefore, work efficiency is improved. It Further, the invention according to claim 2 also omits the cut-off work of the steel pipe.

[0014]   The present invention, as described above, is a reinforcing iron for cut-off of foundation pile head and footing connection. Since it does not require the attachment of muscles, it improves workability and contributes to cost reduction. It is a device of various practical value.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical front view of a thin steel pipe before cutoff according to an embodiment of the invention as set forth in claim 1;

FIG. 2 is a partially cutaway vertical front view of the above steel pipe after cutoff.

FIG. 3 is a partially cutaway vertical front view before chipping, which is one embodiment of the device according to claim 2;

FIG. 4 is a partially cutaway vertical sectional front view after chipping the same as above.

[Explanation of symbols]

1 Steel tube concrete composite pile 2 steel pipe 3 concrete 4 thin steel pipe 5 Reinforcing bar for footing connection

Claims (2)

[Scope of utility model registration request] 1. In a steel pipe-concrete composite pile in which concrete is cast on the inside of a steel pipe and integrated by centrifugal force forming, a thin steel pipe is connected to a cut-off portion of the steel pipe, and further, A steel pipe-concrete composite pile formed by welding a reinforcing bar for footing connection to the inner surface and projecting the upper part thereof up to near the upper end of the thin steel pipe. 2. Placing concrete inside the steel pipe,
In a steel pipe-concrete composite pile integrated by centrifugal force forming, a steel pipe is not provided at a portion corresponding to the cutoff of the steel pipe, and a reinforcing bar is welded to the inner side surface of the steel pipe so that the upper portion thereof is the steel pipe. A steel pipe-concrete composite pile characterized in that it is provided up to the vicinity of the upper end of the cut-off part of.