JP2003328358A - Pile jacking method and pile jacking system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working efficiency of ground penetration in a pile jacking method capable of driving, for example, a bearing pile for preventing settlement and inclination of a building with fewer persons and with ease in a site or working space disabling use of a large pile driver. <P>SOLUTION: A pile jacking system 1 comprises a cylindrical pile body 2, impact bearing means 3 arranged on an inner circumferential wall surface of an opening at one end of the pile body, a weight 4 freely movable in the cylinder of the pile body and tapered at a point portion projectable out from the impact bearing means, and withdrawing means with one end secured to the weight and the other end led out of an opening at the other end of the pile body. The pile jacking method causes the pile body of the pile jacking system to penetrate the ground first, so that if the tip of the pile body strikes an underground obstruction, the weight 4 removes the underground obstruction to permit penetration by the pile body 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving a support pile, which prevents a building from sinking or tilting, to be easily driven by a small number of people in a place or working space where a large pile driver cannot be used. And a pile press-fitting device used in the method.

[0002]

2. Description of the Related Art Conventionally, when a building tilts or sinks due to ground subsidence, steel pipe piles are driven into the ground to horizontally support the building. To drive such steel pipe piles into the ground, it is relatively easy to construct in a place where a pile driving leader can be used, but it is a narrow space where large pile driving machines cannot enter or a narrow work space under the foundation of the building. Among them, for example, conventional example: driving a steel pipe pile into the ground using a jack with a reaction force on the foundation, conventional example: driving a pile using Monken, conventional example: carrying a small amount of weight and reacting It is known to install a power stand and drive a stake.

[0003]

However, when the tip of the steel pipe pile penetrated into the ground hits an underground obstacle, it becomes difficult to drive the pile further by means such as a jack, and It takes a lot of work to remove the underground obstacle. Therefore, the pile press-fitting method and the pile press-fitting apparatus according to the present invention have been proposed to solve such problems.

[0004]

The gist of the pile press-fitting method according to the present invention to solve the above-mentioned problems is to provide a cylindrical pile body and a hit provided on the inner peripheral wall surface of the one end opening of the pile body. The receiving means and a weight that can move freely inside the cylinder of the pile body and that has a tip that is formed in a spire shape so that the tip can project to the outside from the impact receiving means, and one end is attached to the weight. The other end of the pile body is formed into a pile press-fitting device that is led out of the other end opening of the pile body, and the pile body of the pile press-fitting device is first penetrated into the ground, When the tip of the pile body hits an underground obstacle, the underground obstacle is removed by the weight and the penetration of the pile body is performed.

In addition, the weight of the pile press-fitting device penetrates into an underground obstacle, and the vibrating device excites the underground obstacle to remove the underground obstacle; and the pile body penetrates into the ground. After the work is completed, the weight is pulled up to the ground by the pulling-out means.

[0006] The gist of the pile press-fitting device according to the present invention to solve the above problems is to provide a tubular pile body, a hit receiving means provided on an inner peripheral wall surface of an opening at one end of the pile body, and the pile. A weight that can move freely inside the cylinder of the body, a pulling-out means in which one end is connected to the weight and the other end is led out of the other end opening of the pile body, and one end opening of the pile body The rod-shaped body is inserted through the through hole of the striking means into the opening on the tip side of the cap, and the tip of the chisel is projected to the outside. .

Further, the gist of the pile press-fitting device according to the present invention for solving the above-mentioned problems is to provide a cylindrical pile body and a hitting receiving means provided on the inner peripheral wall surface of the one end opening of the pile body. A weight that can freely move inside the cylinder of the pile body and has a tip formed in a steeple shape, the tip being capable of projecting outward from the impact receiving means, and one end connected to the weight and the other end. Is withdrawn from the other end opening of the pile body.

The weight includes a vibrating device which is driven and controlled from the ground; and the tip end portion of the weight is provided with penetration assisting means.

According to the pile press-fitting method and the device thereof according to the present invention, the penetration force of the pile can be enhanced by the pile press-fitting device. Therefore, even if there is an underground obstacle, it is crushed with a weight and eliminated, and the pile body is penetrated with the impact force of the weight. Since this pile press-fitting device is small and lightweight,
When the piles must be driven in in a narrow work space, it is particularly convenient in terms of transportability, workability, and shortening of construction period. Even in the striking work of the pile body by the weight, since the driving is performed in the ground, the striking sound does not spread, and noise damage to the surroundings and environmental damage do not occur. Further, a penetration assisting means such as a reinforcing plate, a protrusion or a vane is attached to the tip end of the weight to further enhance the penetration force into the underground obstacle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a pile press-fitting method and a pile press-fitting apparatus according to the present invention will be described with reference to the drawings. First, as shown in FIG. 1, the first embodiment of the pile press-fitting device 1 according to the present invention includes a tubular pile body 2 made of a round or square steel pipe and an opening at one end of the pile body 2. A metal ring body 3 serving as a striking receiving means provided at all or part of the peripheral wall surface.
And a weight 4 which can freely move inside the cylinder of the pile body 2 and has a tip 4a formed in a spire shape so that the tip 4a can project from the opening of the ring body 3 to the outside. A pull-out rope 5 which is a pull-out means, one end of which is connected to the other end and the other end of which is led out of the other end opening of the pile body 2.
It consists of and.

Further, inside the weight 4, a vibrating device 4b which is drive-controlled (hydraulic pressure, pneumatic pressure, electric power) from the ground is included. Reference numeral 6 causes the weight 4 to be driven and excited,
A hose cord for signal transmission and power supply or driving oil, compressed air, etc. is shown.

The tip portion 4a is made to be the same as or different from the weight 4, and the pile body 2 and piles connected to the pile body 2 are made of steel, cast iron, plastic or concrete. Manufactured, etc.

As a second embodiment of the pile press-fitting apparatus according to the present invention, a penetrating assisting means 4c is provided on the steeple-shaped tip portion 4a of the weight 4. There are various types of the penetration assisting means 4c. For example, as shown in FIG. 2, an iron plate 4d having a triangular shape like four blades (FIG. 2A), a triangular blade having a saw blade, and the like. It is an iron plate 4e (Fig. (B)),
As shown in FIG. 3, a concave groove 4f may be formed in a cross shape on the outer peripheral surface of the tip portion 4a formed in a steeple shape,
As shown in FIG. 2, two triangular plates 4g and 4h are orthogonal to each other and are provided in a cross shape.

Further, as shown in FIG. 5, the tip portion 4a is formed.
A rod-shaped chisel 9 may be provided at the tip of the. By such a penetration assisting means 4c, the penetration into the ground and the earth removal force are increased.

The weight 4 in the pile press-fitting device 1 has a length along the axis of the main body portion of, for example, 50 cm or more to about 1 m, and its weight is about 40 kg.
f to 50 kgf.

A pile press-fitting method according to the present invention using the pile press-fitting device 1 will be described. First, on the inner peripheral wall surface of the lower opening of the tubular steel pipe pile 2, as shown in FIG.
The ring body 3 shown in (B) is fixed by welding means.

The pile body 2 is erected on the ground and is first penetrated with a jack or the like. Inside the pile body 2, a weight 4 equipped with a pull-out rope 5 and a hose cord 6 for control.
Insert. As shown in FIG. 6, the pull-out rope 5
Is wound on a winding drum 7, and the cord 6 is connected to a control device 8. A part of the tip portion 4a of the weight 4 jumps out from the opening of the ring body 3 and bites into the ground.

The pile body 2 and steel pipe piles 2a, 2 which are vertically added to the pile body 2 by pressure operation of a jack or the like are added.
Insert b, ... into the ground. If this ground is relatively soft, vertical pressure operation with a jack or the like is sufficient.

When the pile body 2 at the tip hits a solid ground or an obstacle, as shown in FIG.
The vibrating device 4b in 4 is driven via the hose cord 6 by a command from the control device 8.

By driving the vibrating device 4b, the weight 4 vibrates violently up and down, and the striking force is transmitted to the pile body 2 through the ring body 3. Then, due to the vibration of the steeple-shaped tip portion 4a or the rod-shaped chisel 9, the solid ground or the underground obstacle is destroyed, and the conical wall surface of the tip portion 4a pushes it out to the periphery of the pile body 2 and eliminates it. The pile body 2 is penetrated by the striking force.

When the ground is hard from the beginning, the weight 4 is applied from the time when the first pile body 2 is inserted into the ground.
Is vibrated by the vibrating device 4b so that the pile body 2 is penetrated.

The pile body 2 and the steel pipe pile 1 connected by welding
When the depths a, 2b, ... Have reached the desired depth, the winding drum 7 is rotationally driven, and the weight 4 is lifted to the ground via the pull-out rope 5. Then, another ring body 3 is welded and fixed to the upper steel pipe pile (for example, the steel pipe pile 2c). Then, the weight 4 is set in the steel pipe pile again, and the vibrating device 4b is driven to press-fit the steel pipe pile. In this way, the supporting force of the steel pipe pile is controlled by the weight 4 and the control device 8 so as to obtain a desired supporting force.

If the underground obstacle is considerably hard, the weight 4 is temporarily pulled up by the pull-out rope 5, and then the weight 4 is allowed to fall naturally, and the tip portion 4a thereof is turned into the underground obstacle. It is also possible to break into the ground obstacle by making it bite and further driving the vibration device 4b.

Another embodiment of the tip portion 4a is shown in FIG.
As shown in FIG. 5, a metal cap 10 having a taper toward the ground, for example, a substantially conical shape or a steeple shape is fixed to the tip end of the pile body 2 by welding means.

A hole 10a is provided as an opening at the tip (ground side) of the cap 10, and a chisel 9 described later is inserted into this hole.

Then, the chisel 9 shown in FIG. 7 (B) is attached to the inside of the pile body 2 by penetrating through the hole of the ring body 3 fixed to the tip portion of the pile body 2, and the tip portion of the cap 10 is attached. Hole 1
The tip portion 9a of the chisel 9 is projected to the ground side from 0a.

The fleas 9 have midway in their longitudinal direction.
A hammer hitting flange portion 9b is provided, and a retaining projection 9c for preventing the chisel 9 from coming off to the ground side is provided. Reference numeral 9d indicates a reinforcing plate.

When using the tip portion 4a according to this embodiment, a weight 4 equipped with a pull-out rope 5 and a control hose cord 6 is inserted into the pile body 2 shown in FIG. 7 (A). To do. The vibrating device 4b of the weight 4 is driven to vibrate the flange portion 9b of the chisel 9 and the ring body 3, and the hard ground is crushed by the sharp tip 9a protruding from the cap 10. Use the cap 10 to remove soil. On the other hand, in the above-ground part, the steel pipe piles 2a and 2b connected to the pile body 2 are pushed by a jack or the like,
The pile body 2 is made to penetrate into the ground.

After the construction is completed, the weight 4 is removed. Since the weight 4 is small and lightweight, it can be carried by one worker, and there is no problem even if the construction site is in the back of a narrow passage or in a narrow work space under the foundation. It can be transported by ordinary trucks. In addition, the pile press-fitting method and the device thereof of the present invention are used not only for the penetration of the piles for supporting the buildings and structures, but also for the discharge-free drill for drilling underground holes and the destruction / elimination of underground obstacles. It is possible.

[0030]

As described above, the pile press-fitting construction method according to the present invention forms the pile press-fitting apparatus according to the present invention, and the pile body of the pile press-fitting apparatus is first penetrated into the ground, and the pile body When the tip hits an underground obstacle, the weight is used to eliminate the underground obstacle, and the pile press-fitting method is used to perform the penetration of the pile body.Therefore, even if there is an underground obstacle in the ground, the pile is efficiently piled. It has an excellent effect that it can penetrate. In particular, even in a place where the upper working space is limited, the work method can efficiently perform the work.

Since the weight of the pile press-fitting device is penetrated into the underground obstacle and the underground obstacle is eliminated by vibrating by the vibrating device, the pile can be smoothly moved to the ground with a smaller pressure than before. Can be penetrated. Further, since the weight is inside the pile body and in the ground, there is no spread of the impact sound,
It does not cause noise damage to the surroundings or cause environmental damage.

The pile press-fitting device according to the present invention is capable of freely moving inside the tubular pile body, the impact receiving means provided on the inner peripheral wall surface of the one end opening of the pile body, and the inside of the pile body cylinder. A weight, a pulling-out means, one end of which is connected to the weight and the other end of which is led out of the other end opening of the pile, a cap fixed to the one end opening of the pile, The rod-shaped main body is inserted from the through hole of the impact receiving means to the opening portion on the tip side of the cap, and the tip portion thereof is configured to be a chisel that projects outward, or a tubular pile body, Strike receiving means provided on the inner peripheral wall surface of the one end opening of the pile body, and free movement in the inside of the cylinder of the pile body, and the tip portion is formed in a spire shape so that the tip portion is outside from the strike receiving means. And a weight that can be protruded to one end and one end of which is connected to the weight and the other end of which is the other end opening of the pile body. The structure is simple and easy to handle due to the extraction means that is led out to the outside, so that the pile can easily penetrate into the ground even in a narrow work space or work space where a large pile driver cannot enter. It has an excellent effect that it can be done.

Since the weight includes a vibrating device which is driven and controlled from the ground, underground obstacles can be easily eliminated.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view (A) of a pile press-fitting device according to the present invention, and a perspective view (B) showing an example of a ring body.

FIG. 2 is a perspective view (A) and (B) of a tip portion 4a according to a second embodiment of the pile press-fitting device according to the present invention.

FIG. 3 is a perspective view (A) and a bottom view (B) of a pile press-fitting apparatus according to the second embodiment of the present invention in which a groove 4f is provided in a tip portion 4a.

FIG. 4 is a side view (A), a front view (B), and a bottom view (c) in the case where the tip end portion 4a according to the second embodiment of the pile press-fitting device according to the present invention is composed of two triangular plates. is there.

FIG. 5 is a front view showing a case where a rod-shaped chisel 9 is provided on the tip portion 4a according to the second embodiment of the pile press-fitting device according to the present invention.

FIG. 6 is an explanatory diagram of a pile press-fitting method according to the present invention.

FIG. 7 is a sectional view (A) according to another embodiment of the tip end portion 4a of the pile press-fitting device according to the present invention, and a front view (B) of a chisel 9 used for it.

[Explanation of symbols] 1 pile press-fitting device, 2 pile body, 3
Ring body, 4 weights, 4a tip portion, 4b vibrating device, 4c penetration assisting means, 4d triangular iron plate, 4e triangular blade-shaped iron plate with saw blade, 4f concave groove, 4g,
4h triangular plate, 5 pulling rope, 6 hose cord, 7 winding drum, 8 control device, 9 rod-shaped chisel, 9a tip,
9b Flange part, 9c Retaining protrusion, 1
0 cap, 10a hole.

Claims (7)

[Claims] 1. A tubular pile body, a striking receiving means provided on an inner peripheral wall surface of an opening at one end of the pile body, a cylinder body of the pile body which can freely move, and a tip portion of which has a spire shape. A weight formed so that the tip portion thereof can project to the outside from the impact receiving means, and a pulling-out means in which one end is connected to the weight and the other end is led out to the outside of the other end opening of the pile body. And a pile body of the pile press-fitting device is first penetrated into the ground, and the tip of the pile body hits an underground obstacle, the weight removes the underground obstacle. Then, the pile press-fitting method is characterized in that the penetration of the pile body is performed. 2. The pile according to claim 2, wherein the weight of the pile press-fitting device penetrates into the underground obstruction and the vibrating device excites the underground obstruction. Press-fitting method. 3. The pile press-fitting method according to claim 1, wherein the weight is pulled up to the ground by the pulling-out means after the completion of the work of the pile body to penetrate into the ground. 4. A tubular pile body, a hitting means provided on an inner peripheral wall surface of an opening at one end of the pile body, a weight capable of freely moving inside the cylinder of the pile body, and one end of the weight. From the through hole of the impact receiving means, the pulling-out means in which the parts are connected and the other end is led out to the outside of the other end opening of the pile body, the cap fixed to the one end opening of the pile body, The pile press-fitting device, wherein the rod-shaped main body is inserted into the opening on the tip side of the cap, and the tip of the bar is projected outward. 5. A tubular pile body, a striking receiving means provided on an inner peripheral wall surface of one end opening portion of the pile body, a cylinder body of the pile body which is freely movable, and a tip portion of which has a spire shape. A weight formed so that the tip portion thereof can project to the outside from the impact receiving means, and a pulling-out means in which one end is connected to the weight and the other end is led out to the outside of the other end opening of the pile body. The pile press-fitting device is characterized by comprising: 6. The pile press-fitting device according to claim 5, wherein the weight includes a vibrating device which is drive-controlled from the ground. 7. The pile press-fitting device according to claim 5, wherein a penetration assisting means is provided at a tip end portion of the weight.