JPH10311033A - Collared steel pipe pile and penetration method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work environment by applying the constitution that a collar having a joint means is preliminarily secured to the end of a steel pipe pile, and collared steel pipe piles so formed are carried to a work space under a building and driven into a subsoil in such a state as being jointed each other with the collars. SOLUTION: A collar 2 made of metal such as a steel plate is welded to one end of a steel pipe pile 10, and a jointing flange 3 is welded to the other end thereof. The collar 2 is a circular or square flat plate body and the center thereof is formed to have a through-hole for inserting a steel pipe. Also, through- holes 2b as jointing means for the collar 2 are formed at equal intervals around the center through-hole. A collared steel pipe pile 1 with the collar 2 secured to the end of the steel pipe pile 10 at a factory of the like is carried to a construction site, and further carried into work space under a building foundation. Then, the collar 2 and the collar 2 of the next-stage collared steel pipe pile 1 are connected with bolts and nuts. A reaction force is taken from the lower surface of the building foundation, and the collared steel pipe pile 1 is pushed into a subsoil by use of a jack. According to this construction, no welding work is required and work environment in narrow space is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile driven into the ground to support the foundation of a building and a method of penetrating the steel pipe pile.

[0002]

2. Description of the Related Art Conventionally, in a steel pipe pile for correcting a tilt due to land subsidence of a building or for supporting a foundation of a building which may be tilted, a work space is secured under the foundation of the building to secure the working space. It is known that a steel pipe pile is driven into the ground by taking a reaction force to support the building.

In order to connect the steel pipe piles and drive them into the ground 12, as shown in FIGS. 8 and 9, the upper and lower end surfaces of the steel pipe piles 10 are connected to each other by a welding means a in a work space. The steel pipe pile is being extended. Further, in order to increase the supporting force of the steel pipe pile, a flange 11 is attached in the middle of the steel pipe pile 10 by welding means. In this case, while connecting the flanged steel pipe pile to the ground 12, a reaction force is applied to the foundation and pushed in by a jack or the like, and the gap between the ground and the steel pipe pile between the flanges 11 is filled with gravel, sand, or filling. It is filled with chemicals for use.

[0004]

However, the welding work of the steel pipes and the welding work of welding and fixing a flange in the middle of a steel pipe pile are also performed in a narrow working space under the foundation of the building. There is a problem that the working environment deteriorates due to the generation of strong light or smoke accompanying the welding operation. As described above, the conventional steel pipe pile supporting a building has problems to be solved in its workability and work environment.

[0005]

The gist of the present invention for solving the above-mentioned problem of the method for penetrating a flanged steel pipe pile according to the present invention is that a flange having connection means is previously fixed to an end of the steel pipe pile, The steel pipe piles are carried into the work space under the building, and are driven into the ground while connecting the steel pipe piles with each other by the flange.

[0006] The steel pipe pile at the tip to be driven into the ground is a front pipe in which a flanged steel pipe pile having flanges fixed to both ends is cut at the center, and a cut portion without the flange is set toward the ground. It is.

The gist of the method for penetrating a flanged steel pipe pile according to the present invention is that a flange having connection means is fixed to an end of the steel pipe pile, and the flange is projected from an end face of the steel pipe pile. That is, it is fixed to the end of the steel pipe pile by being moved or retracted, and a guide portion for connection is formed at the end of the steel pipe pile.

According to the method for penetrating a flanged steel pipe pile according to the present invention and the steel pipe pile, a flange for connecting steel pipes is fixed to the steel pipe pile in advance, so that welding work can be performed in a narrow work space under the foundation of a building. Since it is not necessary to improve the working environment for the workers, the steel pipe pile guides can easily connect the steel pipe piles with bolts, etc. Become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method for penetrating a flanged steel pipe pile according to the present invention and the flanged steel pipe pile will be described with reference to the drawings. Note that, for easy understanding of the present invention, portions corresponding to the conventional example are denoted by the same reference numerals as the conventional example.

In the first embodiment of the present invention, as shown in FIG. 1, a flanged steel pipe pile 1 is formed by welding a metal flange 2 such as an iron plate to one end of a steel pipe pile 10, for example. And the connecting flange 3 is fixed to the other end by welding means. This welding work is performed in advance at a factory or the like.

As shown in FIGS. 2A and 2B, the flange 2 is a circular or square plate having a through hole 2a for inserting a steel pipe at the center thereof. The through hole 2
At least three through holes 2b, which are connecting means for the collar 2, are provided around the periphery of a in FIG.

The size of the flange 2 is larger than the area of the normal connecting flange 3 and is set to be approximately two to three times the cross-sectional area of the steel pipe pile 10.

Further, the flange 2 may be fixed to both ends of the steel pipe pile 10 by welding means.

Then, the flanged steel pipe pile 1 in which the flange 2 is fixed in advance to the end of the steel pipe pile 10 at a factory or the like is carried into the site, and is carried into the working space formed under the foundation of the building.

As shown in FIG. 3, the flange 2 and the flange 2 of the next-stage flanged steel pipe pile 1 are fitted to the preceding flanged steel pipe pile 1 that has been driven into the ground 12, and the flanges 2 and 2 are penetrated. Holes 2b, 2b
And a bolt is passed therethrough and fastened with a nut to connect the flanged steel pipe piles 1 and 1 successfully.

Then, a reaction force is applied to the lower surface of the foundation of the building,
The flanged steel pipe pile 1 is pushed into the ground 12 with a jack or the like.

Next, as a second embodiment of the present invention, as shown in FIGS. 4 and 5, when the flange 2 is fixed to the end of the steel pipe pile 10 by welding, the flange 2 is attached to the steel pipe pile 10. The steel pipe pile 10 is fixed to the end of the steel pipe pile 10 by projecting or retracting from the end face, and a connecting guide portion 4 is formed at the end of the steel pipe pile 10 to obtain the steel pipe piles 1a and 1b. is there.

As shown in FIG. 4A, the flange 2 is connected to the steel pipe pile 1.
As shown in FIG. 4B, the flange 2 is retracted from the end face of the steel pipe pile 10 by approximately α from the end face of the steel pipe pile 10 so as to be retracted by α from the end face of the steel pipe pile 10 to form a protruding guide section 4 and to be fitted into the guide section 4. The guide portion 4 is formed so as to protrude by β equal to.

In order to connect the steel pipe piles 1a and 1b, as shown in FIG. 5, the steel pipe piles 1b are fitted so as to be fitted to the protruding guide portions 4, and the aligned flanges 2 are arranged. The bolts are inserted through the through holes 2b, 2b, and fastened with nuts.

As described above, when the flange 2 is fixed to the end of the steel pipe pile 10, the provision of the guide part 4 enables the steel pipe pile 1 a,
1b can be easily connected.

As a third embodiment of the present invention, the tip of a flanged steel pipe pile 1 driven into the ground 12 has a flange 2 at least at one end of the steel pipe pile 10 as shown in FIGS.
The flanged steel pipe pile 1c to which is fixed is cut at the center thereof, and the cut portion 1d without the flange 2 is used as a leading conduit for setting the ground portion 12 toward the ground 12.

By using the leading end of the pile as the tip of the pile, when the cut portion 1d is press-fitted with a jack, the cut portion 1d can penetrate into the ground 12 without being displaced in the lateral direction and can be reliably penetrated. .

As described above, in the first to third embodiments of the present invention, the flanged steel pipe piles 1, 1a, 1b, and 1c are placed on the ground 12 by jacks or the like by applying a reaction force to the lower surface of the foundation of the building.
To form a gap between the steel pipe pile 10 and the ground 12 between the flanges 2 and 2 of the steel pipe piles that have been successfully connected, so that gravel, sand, or a filling agent or material is filled into the gap to support the steel pipe pile. And a flanged steel pipe pile penetrates the ground 12 to support the foundation of the building and prevent settlement.

[0024]

As described above, according to the method for penetrating a flanged steel pipe pile according to the present invention, a flange having a connecting means is fixed to an end of the steel pipe pile in advance, and the flanged steel pipe pile is placed under a building. It is carried into the work space and driven into the ground while connecting the steel pipe piles with each other with the flange, so in the work space, the connection of the steel pipe piles can be performed by connecting the flanges with bolts etc., and welding work is unnecessary As a result, the working environment in a narrow working space is improved, the working efficiency is improved, and the construction period is shortened.

Further, the steel pipe pile at the tip to be driven into the ground is formed by cutting a flanged steel pipe pile having flanges fixed to both ends at the center thereof, and setting a cut portion without the flange toward the ground. By doing so, there is an excellent effect that the flanged steel pipe pile can be penetrated into a predetermined position without displacement.

Further, when the flange is fixed to the end of the steel pipe pile, the flange is projected or retracted from the end face of the steel pipe pile, and a guide portion for connection is provided at the end of the steel pipe pile. By forming a flanged steel pipe pile and providing a connection between the steel pipe piles using the guide portion, it is possible to easily and accurately connect the steel pipe piles even in a narrow work space. It is effective.

In the flanged steel pipe pile according to the present invention, a flange having a connecting means is fixed to the end of the steel pipe pile. There is an excellent effect that the work is eliminated and the working environment is improved and the working efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a flanged steel pipe pile according to a first embodiment of the present invention.

FIG. 2 is perspective views (a) and (b) of a flange of the flanged steel pipe pile according to the present invention.

FIG. 3 is an explanatory view showing a state where flanged steel pipe piles according to the present invention are connected.

FIG. 4 is a partial front view (a) and (b) of a flanged steel pipe pile according to a second embodiment of the present invention.

FIG. 5 is an explanatory view showing a use state of a flanged steel pipe pile according to a second embodiment of the present invention.

FIG. 6 is an explanatory view showing a method for forming a flanged steel pipe pile according to a third embodiment of the present invention.

FIG. 7 is an explanatory view showing a use state of a flanged steel pipe pile according to a third embodiment of the present invention.

FIGS. 8A and 8B are explanatory views (a) and (b) showing a method of connecting a steel pipe pile and a method of fixing a flange according to a conventional example.

FIG. 9 is an explanatory view (a) and (b) showing a use state of the steel pipe pile according to the conventional example.

[Explanation of symbols]

1, 1a, 1b, 1c flanged steel pipe pile, 2 flange, 2b
Through-hole of connecting means, 3 flanges, 4 guides, 1
0 steel pipe, 11 tsuba, 12 ground.

Claims (5)

[Claims] 1. A flange having a connecting means is fixed to an end of a steel pipe pile in advance, and the flanged steel pipe pile is carried into a work space under a building, and is driven into the ground while connecting the steel pipe piles with the flange. A method of penetrating a flanged steel pipe pile, characterized in that: 2. A steel pipe pile at the tip to be driven into the ground is a front pipe in which a flanged steel pipe pile having flanges fixed to both ends is cut at a central portion thereof, and a cut portion without the flange is set toward the ground. The method for penetrating a flanged steel pipe pile according to claim 1, characterized in that: When the flange is fixed to the end of the steel pipe pile, the flange is projected or retracted from the end face of the steel pipe pile, and a connecting guide portion is provided at the end of the steel pipe pile. The method of penetrating a flanged steel pipe pile according to claim 1, wherein the flanged steel pipe pile is formed to connect the steel pipe piles using the guide portion. 4. A flanged steel pipe pile, characterized in that a flange having connection means is fixed to an end of the steel pipe pile. 5. The steel pipe pile is fixed to an end of the steel pipe pile by projecting or retracting a flange from an end face of the steel pipe pile, and a guide portion for connection is formed at the end of the steel pipe pile. The flanged steel pipe pile according to claim 4, characterized in that: