JPH1129953A - Penetration method of steel pipe pile, correction method of settlement of building, and joint of steel pipe pile used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily joint steel pipe piles with each other, and to penetrate the steel pipe pile perpendicularly into the ground while securing the safety of the steel pipe pile under penetration by a tightened part by bolting tightening parts of half-split joints, and pressing the parts to a joint part of the steel pipe piles. SOLUTION: A steel plate is folded to the contour of a steel pipe pile 10 to form half-split joints 1, 1. The ground under a foundation of a building is dug to secure the working space, the steel pipe pile 10 is pressed in by a jack by the prescribed quantity, another steel pipe pile 10 is set thereon, the half-split joints 1, 1 are abutted on a joint part of the steel pipe piles 10, 10, bolts and nuts are inserted in through holes of a tightening part 1d and tightened to be closely attached, the steel pipe piles 10, 10 are pressed into the ground 12 by the jack, and this work is repeated. The tightening part 1d is smoothly penetrated into the ground 12 in a perpendicular direction by a tapered part 1c while preventing the rotation and transverse movement of the steel pipe pile 10. The steep pipe pile 10 can be easily connected and penetrated, and the inclination of the building due to ground settlement can be corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of penetrating a steel pipe pile driven into the ground to support a foundation of a building, a method of repairing a building, and a joint used for connecting and correcting 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 lengthen a steel pipe pile when it is driven into the ground, as shown in FIG. 15, the end face of the steel pipe pile 10 driven into the ground and the end face of the steel pipe pile to be added thereto are welded together. They are connected by means a.

[0004] Then, in order to drive the steel pipe pile 10 into the ground 12, as shown in FIG. 16, in a work space 13 constructed under the foundation 11 of the building, a steel pipe pile 10 is used to take a reaction force on the foundation 11. Ground 1 while welding and adding pile 10
2

[0005]

However, since the working space 13 is a space excavated under the foundation 11 of the building and is a narrow space, it is difficult to weld the steel pipe piles 10, 10 in this space. There are various difficulties. That is,
It is difficult to weld while setting the steel pipe pile 10 to be added straight, the strength is insufficient due to the welding skill and the quality is not constant, and the welding work on the opposite side of the entrance and exit of the working space is particularly space consuming. Therefore, there is a problem that work is difficult and the work efficiency is poor, and smoke and electric shock at the time of welding must be paid attention. Furthermore, when pushing a pile, it is necessary to drive the pile straight into the ground, but this is not easy in practice.
If an obstacle hits a part of the tip of the pile while pushing the pile, the pile will be eccentric and rotate or move laterally, making it difficult to drive vertically, and the jack will be slanted or fly and the worker There is a risk of injury. There is a problem that it is very difficult to correct the eccentric pile once to a normal position, and it requires a great deal of labor. After correcting the inclination of the building with a jack for correction, the welding means is used as a method of connecting and fixing the steel pipe pile for correction, so the steel pipe pile can not receive the load of the building until the welding work is completed. There is an inconvenience that it takes time. In addition, there is a problem that welding work is difficult because the working space under the building is narrow, and the health of workers is impaired due to smoke and sparks accompanying welding.

As described above, there are problems to be solved in the conventional method of penetrating the ground while connecting the steel pipe piles by welding means and the method of correcting the building.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the method for penetrating a steel pipe pile according to the present invention, a tubular joint body substantially conforming to the outer shape of the steel pipe pile and a peripheral part of the joint body are provided. This is a penetrating method in which a joint consisting of a fastening portion extending from an end in the direction is formed, and when the steel pipe pile is driven into the ground, the steel pipe piles are successfully connected to each other by the joint to penetrate the ground.

[0008] The fastening portion is directed toward the opposite side of the ground at the time of the penetration so as to reduce the resistance when the steel pipe pile is penetrated and to prevent the steel pipe pile from rotating or moving around the axis. Forming a wing-spreading tapered shape, connecting the steel pipe piles with a joint with the spire of the joint facing the ground side, and connecting the joint of the joint to the joint of a joint adjacent thereto. This is a penetrating method that is appropriately rotated in the horizontal direction and attached to a steel pipe pile in a shifted state.

The gist of the method for correcting a sunk building according to the present invention consists of a tubular joint body substantially conforming to the outer shape of a steel pipe pile and a fastening portion extending from an end of the joint body in the circumferential direction. After a steel pipe pile is driven into the ground under the foundation of the building, a steel pipe pile for correction is interposed between the uppermost surface of the steel pipe pile and the lower surface of the foundation whose settlement has been corrected. This is a correction method in which a steel pipe pile for correction is connected to the steel pipe pile driven into the ground and the building load is immediately received by the steel pipe pile.

[0010] The gist of the joint of the steel pipe pile according to the present invention is formed by a cylindrical joint body substantially conforming to the outer shape of the steel pipe pile, and a fastening portion extending from an end of the joint body in the circumferential direction. That is being done.

[0011] The fastening portion has a tapered wing expanded toward the opposite side of the ground so as to reduce resistance when penetrating into the ground and prevent rotation or lateral movement of the steel pipe pile around the axis. It is formed in a shape.

According to the method for penetrating a steel pipe pile and the joint thereof according to the present invention, there is no need to connect the steel pipe piles by welding in a narrow working space below the building, and the joint can be easily tightened with bolts and the like. Therefore, the working environment is improved and the working efficiency is improved. In addition, since the joint of the joint is formed in a tapered shape, it can penetrate the ground without difficulty, and rotation or lateral movement around the axis generated in the steel pipe pile penetrated into the ground by the pressing force of the jack etc. is prevented As a result, a smooth penetrating operation is performed, and the operation efficiency is improved. In particular, in the case of the pile-side driving method, in which a jack is installed beside the pile and the pile is pushed in, the axis of the pile is likely to move and shift, and the current situation where it is very difficult to correct the position of the pile has been solved. When pressing the jack, there is no danger of the jack being skewed and jumping, and safety is improved.

According to the method of repairing a building of the present invention, the steel pipe pile for the repair can be quickly fixed by the bolts and nuts by the joint, which not only shortens the construction period, but also shortens the construction period.
Since the welding means is not used, the adverse effect of the welding operation in a small space is brain dead.

[0014]

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

As shown in FIG. 1, a joint 1 of a steel pipe pile according to a first embodiment of the present invention is made of a metal, for example, an iron plate.
A required number of through holes 1b for bolts are formed at both ends of the sheet 1a, and a tapered portion 1c is further provided.

Then, the single plate 1a such as the iron plate is bent, and if the steel pipe pile to be connected has a square shape, as shown in FIG.
The joint portion 1d of a half-pipe steel pipe pile is formed by providing a fastening portion 1d which is formed into a U-shape for approximately half a circumference, extends perpendicularly from an end in the circumferential direction, and is formed as a wing-spread.

As shown in FIG. 3, a pair of the joints 1 are formed by facing each other and facing each other to form a pair. As shown in FIG. 4, a single plate 1a may be bent so as to cover approximately the entire circumference of the square steel pipe pile.

If the steel pipe pile to be connected has a cylindrical shape, as shown in FIGS. 5 and 6, the steel pipe pile is formed in a substantially semicircular shape substantially in conformity with the outer shape of the steel pipe pile, and is formed in a circumferential direction. Of the steel pipe pile is formed by forming a fastening portion 1d extending perpendicularly from the end of the steel pipe pile. Then, a pair of joints 1 to the cylindrical steel pipe pile is formed by facing each other and forming a pair.

As shown in FIG. 7, a single plate 1a may be bent so as to cover approximately the entire circumference of the cylindrical steel pipe pile.

The joint 1 of the steel pipe pile thus formed
8 to 9 are used to modify the foundation of a building.
As shown in FIG.
, And a square steel pipe pile 10 is made to penetrate the ground 12 by a jack or the like which takes a reaction force on the lower surface of the foundation 11.

The steel pipe pile 10 is pushed in by a predetermined amount with the jack, the rod of the jack is retracted once, the steel pipe pile 10 to be added is set there, and the joints of the steel pipe piles 10, 10 are joined by the half joints 1, 1. , And bolts are inserted through the through holes 1b of the opposed fastening portions 1d, 1d, and fastened with nuts. Thereafter, a jack is set on the successfully connected steel pipe pile 10, a reaction force is applied to the foundation 11, the connected steel pipe pile 10 is pushed into the ground 12, and this operation is repeated.

Joint 1 for connecting steel pipe piles 10, 10
Is ground 1 by the tapered portion 1c of the fastening portion 1d.
Since the two sides have a spire shape, and the opposite side from the ground 12 is a widened wing, the spire-shaped portion of the fastening portion 1d is attached to the steel pipe 10 toward the ground 12 and penetrates the ground. The resistance at the time when the joint 1 is penetrated is reduced, so that the penetrating operation becomes smooth.

Further, the fastening portion 1d of the joint 1 is
After the steel pipe pile 10 has penetrated into the steel pipe 2, the steel pipe pile 10 can be prevented from being rotated or laterally moved around its axis by the pressing force of a jack or the like by the expanded portion 1d. Thus, the pressing force of the pressing means such as a jack is always vertically applied and is efficiently transmitted to the steel pipe pile 10 without waste.

The method for penetrating a steel pipe pile according to the second embodiment of the present invention relates to the mounting arrangement of the fastening portion 1d of the joint 1, and as shown in FIG. The joints 1, 1,... Attached to the steel pipes are rotated by 90 degrees in the horizontal direction with the joints 1d adjacent to each other, and shifted so that the steel pipe piles are successfully connected to each other.
2 is a method of penetrating. The same applies when the joint 1 shown in FIG. 4 is used.

By adopting such a penetrating method, when the fastening portion 1d, which is an expanded wing of the joint 1 fastened to the successfully connected steel pipe piles 10, 10,. This is a state in which it is arranged in the front-rear and left-right directions, so that rotation or lateral movement around the axis in the penetrating action of the steel pipe pile is reliably prevented, and stable straightness can be obtained.

The method for penetrating a steel pipe pile according to the third embodiment of the present invention is as shown in FIG. 11, when the steel pipe pile 10 is a cylindrical steel pipe, the fastening portion 1d of the joint 1 is placed in the vertical direction, and The steel pipe pile 10 is rotated in the horizontal direction at an arbitrary angle, for example, about 60 degrees, about 90 degrees, etc.
The joint 1 is attached to the rim. The same applies when the joint 1 shown in FIG. 7 is used.

Also in the third embodiment, a large number of fastening portions 1d of the wing spread are arranged around the steel pipe pile in the circumferential direction, so that the same operation and effect as in the second embodiment can be obtained. is there.

A fourth embodiment of the present invention relates to a method of modifying a building, wherein a working space 13 is formed under a foundation 11 of a building by the intrusion method according to each of the above embodiments. A jack that takes a reaction force is set on the lower surface of the foundation 11, and the steel pipe pile 10 is penetrated into the ground 12 by the jack while being spliced with the joint 1, and then, as shown in FIG. A reaction table 14 for jacks is set on the uppermost steel pipe pile 10 a of the piles 10.

A jack 15 is set on the reaction table 14, and the jack 15 is actuated to push up the foundation 11, thereby correcting the inclination due to the settlement of the building.

Then, the dimension of the gap formed between the upper end face of the steel pipe pile 10a and the lower face of the foundation 11 is measured, and the steel pipe pile having the dimension height is formed by cutting the fixed-length steel pipe pile 10. . The steel pipe pile formed by cutting is referred to as a correction steel pipe pile 16.

The steel pipe pile 16 for correction is inserted and interposed in the gap. And the already formed joint 1
At the joint between the steel pipe pile 16 for correction and the steel pipe pile 10a at the top. If the steel pipe pile is square, the joint 1 shown in FIG. 3 is used. If the steel pipe pile is cylindrical, the joint 1 shown in FIG. 5 is used.

Then, a bolt is inserted into each of the bolt through holes 1b in the joint 1 and fastened with a nut. After that, the jack 15 and the reaction table 14 are removed.

Thus, as shown in FIGS. 13 and 14, the load of the building is supported by the steel pipe piles 16, 10a and 10.

When the joint 1 shown in FIG. 7 is used, the joint 1 is loosely fitted in advance to the steel pipe pile 16 for correction or the steel pipe pile 10a, and the steel pipe pile 16 for correction is set in the gap accompanying the above-mentioned correction. After that, the joint 1 may be moved so as to straddle the joint of the steel pipe pile, and may be fastened with a bolt and a nut.

As described above, in the correction method according to the present invention,
The installation of the steel pipe pile 16 for correction can be quickly performed by the bolts and nuts, thereby shortening the construction period. Also, for the operator, the trouble of electric equipment in the connection method by the welding means can be omitted, and the danger of electric shock and obstacles such as smoke and sparks can be avoided, thereby improving the working environment.

[0036]

As described above, the method for penetrating a steel pipe pile according to the present invention comprises a cylindrical joint body substantially conforming to the outer shape of the steel pipe pile, and extending from a circumferential end of the joint body. When a steel pipe pile is driven into the ground, a steel pipe pile is successfully connected to each other by the joint and the steel pipe piles are penetrated into the ground when the steel pipe pile is driven into the ground, so that welding work is performed in a narrow work space under the building. Therefore, the steel pipe piles can be connected by a simple fastening operation using bolts and nuts, which not only improves the working efficiency but also improves the working environment of the worker.

The fastening portion is directed toward the opposite side of the ground at the time of the penetration so as to reduce the resistance when the steel pipe pile is penetrated and to prevent the steel pipe pile from rotating or moving around the axis. It is formed in a tapered shape with an expanded wing, and by adopting a penetrating method in which the steel pipe piles are connected with the joint by turning the spire of the fastening portion toward the ground side, the resistance when the joint 1 penetrates into the ground 12 is reduced. It is reduced and the penetration work becomes smoother,
After the fastening portion 1d of the joint 1 has penetrated into the ground 12, the wing-spreading fastening portion 1d can prevent the steel pipe pile 10 from being rotated around its axis by the pressing force of the jack or the like. And the like, and the pressing force of the pressing means is efficiently transmitted without waste and vertically to the steel pipe pile.

[0038] The fastening portion, which is a wing-spreader, is formed by rotating the fastening portion of the joint in a horizontal direction with respect to the fastening portion of a joint adjacent thereto and attaching the joint to the steel pipe pile in a shifted state. 1d is a state in which a large number of 1d are arranged in the circumferential direction around the steel pipe pile, and the rotation or lateral movement around the axis in the penetration action of the steel pipe pile is reliably prevented, and the excellent effect that stable straightness is obtained. Is played.

The method for repairing a building according to the present invention is directed to a joint comprising a tubular joint body substantially conforming to the outer shape of a steel pipe pile and a fastening portion extending from an end of the joint body in the circumferential direction. After forming and driving a steel pipe pile into the ground under the foundation of the building, a steel pipe pile for correction is interposed between the uppermost surface of the steel pipe pile and the lower surface of the foundation whose settlement has been corrected, and the steel pipe for correction is connected by the joint. Since the pile is connected to the steel pipe pile driven into the ground side and the building load is immediately received by the steel pipe pile, installation of the steel pipe pile for correction can be carried out quickly with bolts and nuts, compared to the case with welding means This greatly shortens the construction period. In addition, inconvenience due to a difference in welding work ability such as stress distortion in a welding method is eliminated, and an excellent effect is obtained in that the connection is re-easy because bolts are fastened.

Further, for the operator, there is an excellent effect that the labor of the electric equipment in the connection method by the welding means can be omitted, the danger of electric shock and obstacles such as smoke and sparks can be avoided and the working environment can be improved. Things.

[0041] The joint of the steel pipe pile according to the present invention is formed by a tubular joint body substantially conforming to the outer shape of the steel pipe pile, and a fastening portion extending from an end in the circumferential direction of the joint body. In addition, the fastening portion is directed toward the opposite side of the ground so as to reduce resistance when penetrating into the ground and to reliably prevent rotation or lateral movement of the steel pipe pile around the axis. Since it is formed in a tapered shape with expanded wings, it is possible to connect steel pipe piles with fastening means such as bolts instead of welding means, not only improving the working environment,
The resistance to penetration into the ground is also reduced, making for smooth penetration work.

[Brief description of the drawings]

FIG. 1 is a front view of a joint of a steel pipe pile according to the present invention in a state of a single plate before bending.

FIG. 2 is a perspective view of a joint of a steel pipe pile formed in a half-split state for a square steel pipe pile according to the present invention.

FIG. 3 is a perspective view of a pair of joints facing each other in FIG. 2;

FIG. 4 is a perspective view of a joint of the steel pipe pile according to the present invention.

FIG. 5 is a perspective view of a joint of a steel pipe pile formed in a half-split state for a cylindrical steel pipe pile according to the present invention.

FIG. 6 is a perspective view of a pair of joints facing each other in FIG. 5;

FIG. 7 is a perspective view of a joint of the steel pipe pile according to the present invention.

FIG. 8 is an explanatory view showing that the steel pipe pile penetrates into the ground using the joint of the steel pipe pile according to the present invention.

FIG. 9 is an explanatory view showing a state in which the steel pipe pile is penetrated into the ground using the joint of the steel pipe pile according to the present invention, and the foundation is supported.

FIG. 10 is an explanatory diagram of a penetration method according to a second embodiment of the present invention.

FIG. 11 is an explanatory view of a penetration method according to a third embodiment of the present invention.

FIG. 12 is an explanatory view showing a state in which the foundation of a building is lifted up with a jack by a steel pipe pile penetrating into the ground to correct the inclination.

FIG. 13 is an explanatory view showing a state in which after correcting the inclination, a steel pipe pile for correction is interposed between the uppermost steel pipe pile and the lower surface of the foundation according to the present invention, and is immediately fixed with a joint.

FIG. 14 is an explanatory diagram showing a part of FIG. 13 in an enlarged manner.

FIG. 15 is an explanatory view showing a method of connecting steel pipe piles according to a conventional example.

FIG. 16 is an explanatory view showing a method of penetrating a steel pipe pile according to the conventional example.

[Explanation of symbols]

1 joint of steel pipe pile, 1b through hole, 1c taper part,
1d fastening part, 10 steel pipe pile, 10a top steel pipe pile, 11 foundation, 12 ground, 13 work space, 14
Reaction table, 15 jacks, 16 steel pipe pile for correction.

Claims (6)

[Claims] 1. A joint comprising a tubular joint body substantially conforming to the outer shape of a steel pipe pile and a fastening portion extending from an end of the joint body in a circumferential direction, and forming the steel pipe pile on the ground. When driving in, the steel pipe piles are successfully connected to each other by the joint, and the steel pipe piles penetrate into the ground. The fastening portion is directed to the opposite side of the ground at the time of the penetration so as to reduce the resistance when the steel pipe pile is penetrated and to prevent the steel pipe pile from rotating or moving around the axis. The steel pipe pile penetration method according to claim 1, characterized in that the steel pipe pile is formed into a tapered shape with a widened wing, and the steel pipe pile is successfully connected with a joint with the spire portion of the fastening part facing the ground. 3. The joint of claim 1 or 2, wherein the joint of the joint is rotated in a horizontal direction with respect to the joint of the joint adjacent thereto, and attached to the steel pipe pile in a shifted state. The method for penetrating the steel pipe pile as described. 4. A joint consisting of a tubular joint body substantially conforming to the outer shape of a steel pipe pile and a fastening portion extending from an end in the circumferential direction of the joint body is formed. After driving the steel pipe pile into the ground, a steel pipe pile for correction was interposed between the uppermost surface of the steel pipe pile and the lower surface of the foundation whose settlement was corrected, and the steel pipe pile for correction was driven into the ground by the joint. A method of repairing a sunk building, characterized in that the building load is immediately received by the steel pipe pile by connecting to the steel pipe pile. 5. A steel pipe comprising: a tubular joint body substantially conforming to an outer shape of a steel pipe pile; and a fastening portion extending from an end of the joint body in a circumferential direction. Pile fittings. 6. The fastening portion has a wing spread toward the opposite side of the ground so as to reduce resistance when penetrating into the ground and to prevent rotation or lateral movement of the steel pipe pile around the axis. The joint of the steel pipe pile according to claim 5, wherein the joint is formed in a tapered shape.