JPH0715868Y2 - Connection structure of ring-shaped pipe and hose tip in foundation pile - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a foundation pile in which a ring-shaped pipe is attached to the outer periphery of the tip end portion, and grout material injected from the ground through a hose can be ejected from an injection port of the ring-shaped pipe. The present invention relates to a connecting structure between the ring-shaped pipe and a hose tip.

[0002]

2. Description of the Related Art As a foundation pile of this type, Japanese Patent Laid-Open No. 56-6
4018 and Japanese Utility Model Laid-Open No. 54-145903.

[0003]

However, the injection pipe in the above invention is attached to the outer peripheral surface of the non-enlarged portion along the longitudinal direction in advance, so that there is a problem in terms of attachment workability. There is. Furthermore, since the tip of this injection pipe and the ring-shaped pipe attached to the outer periphery of the end of the foundation pile are fixed in an inseparable state, after the completion of the construction, the injection pipe will remain in the ground together with the foundation pile. Since it will be buried, there is a problem that it is uneconomical.

[0004]

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned conventional problems. After the completion of construction, the injection pipe is attached to the outer periphery of the tip of the foundation pile. The purpose of the present invention is to provide a connecting structure between a ring-shaped pipe and a hose tip in a foundation pile that can be easily removed from the ring-shaped pipe by operating on the ground. Attaching a ring-shaped pipe to the outer periphery, in a foundation pile that was made to eject the grout material injected from the ground through a hose from the injection port of the ring-shaped pipe, a joint pipe to the fixed pipe connected to the ring-shaped pipe The connection between the joint pipe and the fixed pipe is made by connecting the hose through the socket portion formed in the joint pipe,
When the fixed pipe is fitted through the movable piece provided in the socket portion so as to be movable in the radial direction and the insertable / detachable wedge that restricts the movement of the movable piece, the wedge is provided with this. The invention characterized by having a structure in which one end of a wire for withdrawing from the ground is attached, and the connection between the joint pipe and the fixed pipe, the socket portion formed in the joint pipe is fitted to the fixed pipe, and The tip of an arm pivotally attached to the outside of the socket part about the center is attached so that it can be engaged with and disengaged from a locking part provided on the fixed pipe, and this is attached to the other end of the arm. A ring-shaped pie in a foundation pile, characterized in that one end of a wire for rotating from the ground to disengage the end of the arm from the engaging portion provided on the fixed pipe is attached. And in coupling structure between the hose tip.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in FIGS. 1 is a partial vertical cross-sectional view showing the use state of the present invention, FIG. 2 is an enlarged vertical cross-sectional view showing the main part of the present invention, FIG. 3 is a cross-sectional view taken along line II-II of FIG. 2, and FIG. FIG. 5 is a plan view of the ring-shaped pipe, and FIG. 5 is a vertical cross-sectional view of another embodiment of the connecting portion between the ring-shaped pipe and the hose.

In the figure, reference numeral 1 denotes a hollow foundation pile, which is connected to a body portion 2 having the same diameter along the longitudinal direction and a tip portion of the body portion 2 via a taper portion 3, and It is composed of an enlarged portion 4 having a larger diameter than the main body portion 2. 5
Is a ring-shaped pipe for injecting grout material into the gap between the outer periphery of the foundation pile and the excavation hole, and has an inner diameter large enough to be mounted on the outer periphery of the main body portion 2 of the foundation pile 1, and the diameter of the outer contour is the enlarged portion
The outer diameter of the ring-shaped pipe 5 is smaller than the outer diameter, and a plurality of injection ports 5a are formed along the circumference on the upper surface side of the ring-shaped pipe 5.

The ring-shaped pipe 5 has a semicircular shape.
The semi-circular pipe is divided into two parts, one end of which is fixed to the left and right of a T-shaped coupling joint 6 formed by mounting a fixed pipe 10 at the center, and the other end of which is a bolt 7 and a nut 8.
Are connected in a ring shape. As a result, the ring-shaped pipe 5 is mounted immediately above the enlarged portion 4 of the foundation pile 1.

Reference numeral 12 is a joint pipe, and a socket portion 9 is formed at the lower end of the joint pipe. When the socket portion 9 is fitted to the fixed pipe 10 through an O-ring 11, the joint pipe is at the upper end. A hose 17 for supplying grout material having high pressure resistance and flexibility made of rubber or the like is fixed. Up to a movable element, 13 is slidable in the socket portion 9 in the horizontal direction, and is disposed in close contact with the outer peripheral surface of the fixed pipe 10 via an O-ring 11, and on the upper surface of the socket portion 9, At the position behind the movable top 13,
Wedge hole 1 into which a wedge 14 vertically formed is inserted
5 is formed. When the wedge 14 is inserted into the wedge hole 15, the movable top 13 is watertightly connected to the fixed pipe 10 and the socket portion 9 of the joint pipe 12.

Reference numeral 16 is a wire, one end of which is connected to the upper end of the wedge 14 and is for pulling out the wedge 14 from the wedge hole 15 by an operation from the ground. Further, the upper end of the hose 17 is wound around a winding drum 18 which is rotatably installed on the ground, and its end is
Although not shown, it is connected to a grout pressure pump via the shaft of the winding drum 18. Therefore, the grout material is supplied from the shaft portion of the winding drum 18 to the ring-shaped pipe 5 via the hose 17. In the figure, numeral 19 indicates the winding drum 18 and the belt 2
The drive source has a reduction gear that rotates by 0.

Next, the operation of the present invention will be described. First, the ring-shaped pipe 5 is mounted right above the enlarged portion 4 of the foundation pile 1 in a factory or a buried site. Further, the socket portion 9 of the joint pipe 12 fixed to the tip portion of the hose 17 is fitted on the upper end of the fixed pipe 10 immediately before the foundation pile 1 is sunk in the excavation hole, and the wedge hole 15 is wedged.
4 is press-fitted to move the movable top 13 in the radial direction of the fixed pipe 10, and the fixed pipe 10 and the joint pipe 12 are connected and fixed by the socket portion 12. Then, the foundation pile 1 is erected upright on the ground A with the enlarged portion 4 facing downward, and a pile driver (not shown) is set on the upper end of the foundation pile 1 to make the foundation pile 1
The drive is connected to the upper end of the earth auger inserted inside.

Therefore, while excavating the ground A by rotating the bit of the earth auger, the foundation pile 1 is sunk by the reaction force of the pile driver. Further, when the hose 17 is unwound from the winding drum 18 in the free state as the foundation pile 1 is sunk, the grout material is used in the gap between the hose 17 and the surrounding ground generated by the enlarged portion 4 of the foundation pile 1. Through the ring-shaped pipe 5
Is injected and filled from the injection port 5a.

In this way, when the foundation pile 1 is buried to a predetermined depth and the grout material is filled up to above the foundation pile 1, the wire 16 is pulled on the ground to pull the wire 16 from the wedge hole 15 to the wedge 14. And pull out the movable top 13
Moves backward and separates from the fixed pipe 10, so that the socket portion 9 can be separated from the fixed pipe 10.

Therefore, when the winding cylinder 18 is rotated in the reverse direction by the drive source 19, the hose 17 is pulled out from the ground, and the winding cylinder 18 is pulled out.
To be wound up. Then, since a predetermined pile circumference fixing portion is formed by the pile circumference fixing liquid in the entire area of the ground around the main body portion 2 of the foundation pile 1, a large frictional force is generated.

As described above, since the tip of the hose 17 can be attached to and detached from the injection pipe 5, the hose 17 can be pulled out and used again and again after the pile is completely laid. Also, the hose 17
Since it is of a type wound on the winding drum 18, a long one can be used, and even in the case of a joint pile, the joint of the hose 17 is not required and the work can be simplified.

FIG. 5 shows another embodiment showing a connecting portion between a ring-shaped pipe and a hose. An arm 21 having a hook 21a at its lower end is pivoted to the outside of the socket portion 9 of the joint pipe 12 at its central portion. The fixed pipe 10 is rotatably pivotally attached to the fixed pipe 10, and the side face of the fixed pipe 10 is provided with a locking portion 23 for engaging and disengaging the hook 21a of the arm 21. Then, when the socket portion 9 of the joint pipe 12 is fitted onto the fixed pipe 10 via the O-ring 11, the hook 21 a of the arm 21 is engaged with the engaging portion 23, and the fixed pipe 10 and the socket portion 9 are engaged. And are in a fixed state.

When the wire 16 attached to the upper end of the arm 21 is pulled from the ground, the arm 21 rotates counterclockwise about the pivot pin 22 and the hook 21a disengages from the engaging portion 23. Therefore, the socket portion 9 can be removed from the fixed pipe 10. The other points are the same as in the above embodiment.

[0017]

[Effect of the Invention] Since the structure for connecting the ring-shaped pipe and the tip of the hose in the foundation pile according to the present invention is as described above, the hose can be pulled up from the ground after the filling of the ground material is completed. However, it can be reused many times and cost can be reduced. In addition, since the hose is attached to the ring-shaped pipe on site, it can be crushed during transportation or installation as in the past. There are various effects that there is no risk of damage or damage.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing a usage state of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a main part of the present invention.

3 is a sectional view taken along line II-II in FIG.

FIG. 4 is a plan view of a ring pipe.

FIG. 5 is a vertical sectional view of another embodiment of the present invention.

FIG. 6 is a partially longitudinal front view of a conventional structure.

[Explanation of symbols]

 1 Foundation Pile 2 Pile Main Body 3 Tapered Part 4 Expanded Part 5 Ring-shaped Pipe 5a Injection Port 9 Socket Part 10 Fixed Pipe 11 O-ring 12 Joint Pipe 13 Movable Top 14 Wedge 15 Wedge Hole 16 Wire 17 Hose 18 Winding Body 19 Drive Source 21 Arm 20a Hook 22 Pivot pin 23 Locking part A Ground

Claims (2)

[Scope of utility model registration request] 1. A ring-shaped pipe is attached to the outer periphery of the tip portion,
In a foundation pile configured to eject the grout material injected from the ground through a hose from the injection port of the ring-shaped pipe, the fixed pipe connected to the ring-shaped pipe is connected to the hose via a joint pipe. ,
The joint pipe and the fixed pipe are connected by a movable piece provided with a socket part formed in the joint pipe so as to be movable in the socket part in a radial direction, and an insertable / detachable wedge for restricting the movement of the movable piece. When fitted to the fixed pipe via the ring, the wedge has a structure in which one end of a wire for pulling the wedge from the ground is attached to the ring pipe and the hose end portion in the foundation pile. Connection structure. 2. A ring-shaped pipe is attached to the outer circumference of the tip portion,
In a foundation pile configured to eject the grout material injected from the ground through a hose from the injection port of the ring-shaped pipe, the fixed pipe connected to the ring-shaped pipe is connected to the hose via a joint pipe. ,
The joint pipe and the fixed pipe are connected to each other by fitting a socket portion formed in the joint pipe to the fixed pipe, and at the end of an arm pivotally attached to the outside of the socket portion substantially rotatably at the center. It is mounted so that it can be engaged with and disengaged from the locking portion provided on the fixed pipe, and the other end of the arm is rotated from the ground to the tip of the arm and the locking portion provided on the fixed pipe. Is a structure in which one end of a wire for removing the engagement of is attached to the ring-shaped pipe and the hose tip portion in the foundation pile.