JP2010281081A - Method for constructing steel pipe pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for constructing a steel pipe pile, which makes an upper structure mounting member fixed to a head, and which dispenses with the welding of the upper structure mounting member to the steel pipe pile on a construction site. <P>SOLUTION: A plate 21, in which an insertion hole 211 for a bolt is preformed, and the steel pipe pile 11 are prepared (Fig.1(a)); the plate 21 for the upper structure mounting member is welded and fixed to the steel pipe pile 11 in a factory etc. (Fig.1(b)); the steel pipe pile 11 with the plate is carried in to the construction site, and buried in the ground 312 (Fig.1(c)); and the plate 21 and a plate 22, on which a support 12 of an upper structure is mounted, are connected together by means of the bolt 23 and nuts 241 and 242. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for constructing a steel pipe pile when a steel pipe pile is buried in the ground (underground) and an upper structure such as a pole or a power pole such as an antenna, a traffic light, or an advertisement is installed on the head of the steel pipe pile.

When embedding a steel pipe pile for installing the superstructure, for example, the construction method of FIG. 4 is conventionally performed.
4 (a) and 4 (b1) are sectional views showing a state where a steel pipe pile is embedded in the ground.
First, FIG. 4A will be described (see, for example, Patent Document 1).
A member (upper structure mounting member) in which a disk-like plate 71 is fixed to one end of a cylindrical member (steel pipe) 62 in advance by welding is prepared. Next, the steel pipe pile 61 is cast and embedded in the ground 312, and the other end of the cylindrical member 62 is fixed to the head of the steel pipe pile 61 by welding. That is, the upper structure attaching member is joined to the head of the steel pipe pile 61.
When the superstructure is an antenna, for example, a disk-shaped plate 72 to which an antenna support (not shown) is attached is coupled to the plate 71 by bolts 73 and nuts 741 and 742. That is, the plate 72 is coupled to the upper structure mounting member. During the connection, the grout material 75 is filled between the plates 71 and 72 as necessary.

Next, FIG. 4B1 will be described (see, for example, Patent Document 2).
First, the steel pipe pile 61 is embedded in the ground 312, and a plurality of plate mounting brackets 76 are fixed to the outer periphery of the head portion of the steel pipe pile 61 by welding, and the plate 71 and the plate mounting bracket 76 are connected by bolts 73 and nuts 741 and 742. Join. That is, in the case of FIG. 4B 1, the upper structure mounting member includes a plate mounting bracket 76 and a plate 71. A plate (not shown) to which the superstructure is attached is coupled to the plate 71 by bolts 73 and nuts 741 and 742, as in 4 (a).
The side surface shape of the plate mounting bracket 76 (the shape viewed from the left side or the right side in FIG. 4 (b1)) is as shown in FIG. 4 (b2).

JP 2006-214226 A JP 2004-11283 A

In the conventional steel pipe pile construction method, the steel pipe pile 11 must be buried in the ground, and the upper structure mounting member must be fixed to the head of the buried steel pipe pile by welding. That is, welding work is required at the construction site of the steel pipe pile. Since the welding work at the construction site may be difficult and dangerous, the work efficiency may be poor and the construction period may be long, and the welding quality may not be sufficient.
In view of the above-described problems of conventional steel pipe pile construction methods, the present invention provides a steel pipe pile construction method capable of efficiently and safely performing steel pipe pile construction and capable of high-quality welding. Objective.

In order to achieve the object of the present invention, the steel pipe pile construction method according to claim 1 prepares a steel pipe pile having an upper structure attaching member fixed to the head in advance, and the steel pipe pile is predetermined on the ground. It is characterized by being embedded to a depth of and joining the upper structure to the upper structure mounting member.
The steel pipe pile construction method according to claim 2 is the steel pipe pile construction method according to claim 1, wherein the upper structure mounting member is a plate.
The construction method of the steel pipe pile according to claim 3 is the construction method of the steel pipe pile according to claim 1 or claim 2, wherein the steel pipe pile is provided with a screw-shaped wing at the tip. To do.
The steel pipe pile construction method according to claim 4 is the steel pipe pile construction method according to claim 3, wherein the steel pipe pile rotates and press-fits.

In the present invention, since the upper structure attaching member is welded and fixed to the steel pipe pile in a well-equipped place such as a factory in advance, it is not necessary to weld the upper structure attaching member to the steel pipe pile at the construction site. Therefore, this invention can perform construction of a steel pipe pile easily, safely and efficiently, and can shorten a construction period. Moreover, since the steel pipe pile and the superstructure attachment member are joined (welded) at a factory equipped with facilities, high-quality welding is possible.
Since this invention rotates and press-fits a winged steel pipe pile, it can embed a steel pipe pile smoothly in the state which attached the upper structure attachment member to the steel pipe pile 11. FIG.

Drawing 1 is a figure explaining the 1st construction method of the steel pipe pile concerning the example of this invention. Drawing 2 is a figure explaining the 2nd construction method of the steel pipe pile concerning the example of the invention in this application. FIG. 3 shows the structure of the plate used in the construction method of FIGS. 1 and 2 and the structure of the tip of the steel pipe pile. FIG. 4 is a diagram illustrating a conventional steel pipe pile construction method.

The construction method of the steel pipe pile which concerns on the Example of this invention with FIGS. 1-3 is demonstrated.
1 to 3, common parts use the same reference numerals.

The procedure of the 1st construction method of a steel pipe pile is demonstrated with FIG.
First, as shown in FIG. 1 (a), a plate 21 in which a bolt insertion hole 211 is formed and a steel pipe pile 11 to be embedded are prepared. As shown in FIG. 1 (b), a plate is placed on the head of the steel pipe pile 11 in a factory or the like. 21 is fixed by welding, and the steel pipe pile 11 with a plate is produced. The steel pipe pile 11 with the plate is carried into the construction site, and the steel pipe pile 11 is press-fitted while being rotated as shown in FIG. At this time, the distance of the plate 21 from the ground surface 311 is set in consideration of the installation conditions of the upper structure. Next, as shown in FIG. 1 (d), the plate 22 to which the upper structure column 12 is attached is coupled to the plate 21 by bolts 23 and nuts 241 and 242. At that time, a grout material may be filled between the plate 21 and the plate 22. In the case of Fig.1 (a), the plate 21 becomes a member which attaches an upper structure to the steel pipe pile 11, ie, an upper structure attachment member.

Next, the procedure of the 2nd construction method of a steel pipe pile is demonstrated with FIG.
First, as shown in FIG. 2 (a), rooting is performed, and a space 313 for foundation construction is excavated in the ground 412. As shown in FIG. 2 (b), the steel pipe pile 11 having the same structure as FIG. 1 is rotated. Then, it is press-fitted or placed and buried in the ground 312. Next, as shown in FIG. 2C, bolts 23 and nuts 241 and 242 are attached to the plate 21 for the upper structure mounting member of the steel pipe pile 11, and a concrete foundation 314 is constructed in the space 313. Then, as shown in FIG. 2 (d), the plate 22 and the plate 22 to which the support structure 12 of the superstructure is attached are coupled by bolts 23 and nuts 241 and 242.

  The construction method in FIGS. 1 and 2 is such that, before embedding the steel pipe pile in the ground, the upper structure mounting member is fixed to the head of the steel pipe pile by welding in a well-equipped place such as a factory. There is no need to weld. Therefore, the construction method of FIG. 1 and FIG. 2 can perform construction of a steel pipe pile easily, safely, and efficiently, and can shorten a construction period. Moreover, since the work of welding the superstructure attachment member to the steel pipe pile is performed in a well-equipped place, high-quality welding is possible.

FIG. 3 shows a structural example of the plate of FIGS. 1 and 2 and a structural example of the tip portion of the steel pipe pile.
3A1 shows an example of the plate 21 shown in FIGS. 1 and 2, and FIG. 3A2 shows an example of the plate 22 shown in FIGS. The plates 21 and 22 have long holes 211 and 221 into which the bolts 23 are inserted. By making the holes 211 and 221 into long holes, the relative positional relationship between the plate 21 and the plate 22 can be adjusted. The plates 21 and 22 may be circular instead of square.

  FIG. 3B is an example in which two screw-like (spiral) blades 111 and 112 are attached to the tip of the steel pipe pile 11. When the steel pipe pile is provided with the wings 111 and 112 at the tip, the periphery of the steel pipe pile 11 can be gripped by a pile construction machine (not shown), and the steel pipe pile 11 can be rotated and press-fitted. Can be embedded smoothly even when the upper structure mounting member is mounted. When the superstructure attachment member is the plate 21 of FIGS. 1 and 2, the steel pipe pile 11 can be rotated and press-fitted by holding the plate 21 with a pile construction machine.

  In the construction method of the above embodiment, the plate 21 is used as the upper structure mounting member and the plate 21 is directly welded to the steel pipe pile 11. However, the upper structure mounting member is the same as the conventional example of FIG. It may be of a structure. In addition, in the case of an upper structure mounting member having a structure in which a conventionally used double pipe pile head structure, a reinforcing bar embedded in a foundation, an anchor bolt, etc. are fixed to the head of a steel pipe pile by welding, the present invention is also applied. Can be implemented.

DESCRIPTION OF SYMBOLS 11 Steel pipe pile 111,112 Wing | blade 12 Superstructure support | pillar 21 Plate for upper structure attachment member 22 Plate 311 which attaches the support | pillar of an upper structure Ground surface 312 Ground 313 Space 314 formed by root cutting Concrete foundation 314

Claims (4)

  A steel pipe pile in which an upper structure mounting member is fixed to the head in advance, the steel pipe pile is buried in the ground to a predetermined depth, and the upper structure is joined to the upper structure mounting member. Pile construction method.   The steel pipe pile construction method according to claim 1, wherein the upper structure mounting member is a plate.   The method for constructing a steel pipe pile according to claim 1 or 2, wherein the steel pipe pile is provided with a screw-shaped wing at the tip.   The construction method of the steel pipe pile according to claim 3, wherein the steel pipe pile is rotated and press-fitted.

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