JPH108466A - Steel pipe holding device for driving steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the number of times of steel pipe joining in pile driving work by conducting a steel pipe to be driven from the opened side of an annular frame into this frame through a horizontal movement, and clamping the outer periphery of the steel pipe with clamping claws. SOLUTION: A movable frame 8b acts to open, and a steel pipe pile 9 to hold a crane is horizontally moved as its vertical attitude is kept, and conducted into the inside of an annular frame 8 to make the movable frame 8b act to close, and a connecting piece 13 is connected to a receiving member 14 through a connecting pin 15. In this state, a hydraulic cylinder 12 is actuated to carry out clamping, and the steel pipe pile 9 is thereby clamped on its outer periphery with clamping claws 10. As the steel pipe pile 9 is held by the steel pipe holding device of a steel pipe pressing-in machine 7, an excavated soil is made muddy by a jetted water in the lower end part of the steel pipe pile 9. The steel pipe pile 9 is lowered and driven using the annular frame 8 as a guide, and weldedly fixed at the butted spot of two steel pipe piles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates mainly to the construction of breakwaters on a bay shore, particularly in harbors where construction conditions are limited, where pile driving is carried out across the entrance of an existing yacht harbor. The present invention relates to a steel pipe holding device for driving a steel pipe pile, which is used for driving a steel pipe pile.

[0002]

2. Description of the Related Art When a steel pipe pile is continuously driven for pier construction in a harbor, a conventional self-propelled steel pipe pile driving apparatus as disclosed in Japanese Patent Application Laid-Open No. 3-169913 is used. In addition, the equipment itself is equipped with a press-in (pile driving) machine, a digging machine, a consolidation machine that fills the soil in the steel pipe, etc., and a mechanism for self-propelling is required, and it becomes quite heavy, It is difficult to use a crane to bring, move, and take out the pile driver.

[0003] In particular, when existing facilities are located on the Gulf and it is difficult to carry in and carry out equipment and materials from land, the construction itself must be carried out under conditions that require the use of floating cranes to carry in and out equipment from the sea. Becomes very difficult or impossible. Therefore, there is a need at the current construction site for a construction method for driving a steel pipe pile using a 130-ton class steel pipe press-fitting machine that can be carried in, carried out, and moved by a crane.

[0004] Therefore, the present inventor has proposed that a steel pipe pile can be driven using a small and lightweight steel pipe press-in machine even when there are existing facilities around the construction site and construction conditions are severe. He has proposed a pile driving method.

[0005]

However, in such a site, there may be an obstacle such as a bridge just above the construction site. In this case, the length of the steel pipe pile is reduced in advance. If not, the clamper of the steel pipe press-in machine (steel pipe holding device) with the steel pipe pile upright due to the obstacle
Can not be inserted into This is because the clamper used in the conventional steel pipe press-fitting machine has a configuration in which a clamp claw that can move in the radial direction of the frame is arranged inside the annular frame, and the steel pipe pile is inserted into the frame from above. This is for insertion.

For example, if the obstacle is at a height of 5 m with respect to the ground level, usually, the upper edge of the clamper of the steel pipe press-in machine, that is, from the upper edge of the frame to the ground level is about 1.5 m. For this reason, a steel pipe pile having a length of 5 m cannot be employed, and a short steel pipe pile having a length of 3.5 m or less must be prepared. This means that the number of steel pipe joints must be doubled in order to obtain the required length of steel pipe piles, resulting in increased production costs, construction processes, and time, and as a whole, uneconomical results. Bring.

Further, a belt-shaped ring member is attached to the steel pipe pile at the outer periphery at the lower end thereof for discharging the earth, and it is necessary to prevent the hole soil wall at the time of driving from being pressed against the outer periphery of the steel pipe. Preventing. For this reason, when inserting the steel pipe pile into the clamper, it is necessary to provide a clearance that allows the ring member to pass through. Next, when holding the outer circumference of the steel pipe with the clamp claws, each of the clamp claws is moved by hydraulic means. It is necessary to move the steel tube toward the outer peripheral surface of the steel pipe considerably by using such a method. This not only complicates the structure of the clamper but also complicates the clamp control.

[0008] The present invention has been made based on the above circumstances, and effectively utilizes the length from the upper edge of the clamper to the ground level so that even if there is an obstacle such as a bridge on the construction line. It is intended to provide a steel pipe holding device for driving a steel pipe pile, which is capable of performing a pile driving operation using a steel pipe pile having a considerable length, and reducing the number of steel pipe joints as much as possible. The purpose is.

[0009]

Therefore, in the present invention,
An annular frame equipped with a clamp claw on an inner periphery of a steel pipe holding device for clamping a steel pipe to be driven from an outer periphery thereof when the steel pipe pile is continuously driven along a predetermined construction line. Is composed of a fixed frame, which can be opened and closed with respect to the horizontal direction, and a movable frame hinged to the fixed frame.The steel pipe to be cast is horizontally moved from the open side of the annular frame. It is guided in the annular frame, and the outer circumference is clamped by a clamp claw.

In this case, the fixed frame is a semicircular holding member on the rear side of the construction line, and is hinged to the fixed frame so as to be open to the front of the construction line. It is a preferred embodiment that it is constituted by a semicircular holding member on the side.

[0011] Therefore, if a steel pipe pile is driven by using this apparatus, when the pile is driven, it is supposed that the pile is temporarily placed above the construction line.
Even if there is an obstacle such as a bridge, it is possible to reduce the number of steel pipe joints, thereby shortening the construction time and exhibiting high economic efficiency.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for driving a steel pipe pile using the steel pipe holding device of the present invention will be specifically described below with reference to the drawings. Here, first, an ordinary, for example, a 60-ton class, so-called, Yadatori type steel sheet pile press-fitting machine 1 (in particular, in this embodiment, an H-steel press-fitting machine is preferably used) and a counterweight 2 are used. As shown in FIGS. 1 to 3, about four steel sheet piles 4 for reaction force are cast on the extension of the starting end of the construction line 3.

Then, the steel sheet pile press-fitting machine 1 is supported on the steel sheet pile 4 and, as shown in FIGS. 4 to 6, a supporting steel material (for example, H steel) is placed at a required position 3a on the construction line 3.
7 and 8, between the steel sheet pile 4 and the supporting steel material 5, along the construction line 3, guide frame members 6, 6 are laid on the left and right sides thereof.

In this state, using a crane (not shown), the press machine 1 for steel sheet piles is removed, and then the press machine 7 for steel pipes is carried in. Then, as shown in FIGS. 11 to 13, the steel sheet pile 4 is supported by the steel sheet pile 4 by holding the steel sheet pile 4 from the left and right with the clamp claws 10.

This steel pipe press-fitting machine is equipped with a steel pipe holding device (clamper) according to the present invention. That is, as shown in FIGS. 9 and 10, the steel pipe holding device clamps the steel pipe pile 9 to be driven from its outer periphery when continuously driving the steel pipe pile along the construction line 3, as shown in FIGS. The annular frame 8 equipped with pad-shaped clamp claws 10 on the inner periphery is composed of a fixed frame 8a which can be opened and closed in the horizontal direction and a movable frame 8b hinged to the fixed frame 8a.

In this embodiment, the fixed frame 8a is a semicircular holding member on the rear side of the construction line, and the movable frame 8b is fixed so as to be open to the front of the construction line. Each of the frame 8a is constituted by a semicircular holding member that is hinged by a hinge pin 11 provided on one side of the frame 8a on the front side of the construction line. Also, the hydraulic cylinder 1 is mounted on the fixed frame 8a.
There is a connector 13 which moves forward and backward at 2, and a receiving member 14 corresponding to the free end side of the movable frame 8b corresponds to the connector 13 via connection holes 13a and 14a provided respectively.
The connection and disconnection of the two can be performed by the operation of fitting and removing the connection pin 15.

Therefore, when inserting the steel pipe pile 9 into the annular frame 8, first, the movable frame 8b is opened in front of the construction line, and the steel pipe pile 9 held by a crane or the like is turned from the front to the rear. Then, while moving vertically, it is moved horizontally and guided inside the annular frame 8. In this state,
The movable frame 8 b is closed, and the connector 13 is connected to the receiving member 14 using the connection pin 15. In this state, by operating the hydraulic cylinder 12 and tightening, the outer periphery of the steel pipe pile 9 is clamped by the clamp claws 10.

In this way, the excavated soil is muddy by jet fountain at the lower end of the steel pipe pile 9 while holding the steel pipe pile 9 by the steel pipe holding device (clamper) of the steel pipe press-fitting machine 7. For this purpose, a nozzle 16 for jet injection is previously mounted on the lower end of the steel pipe pile 9 by means such as welding. Then, as usual, the steel pipe pile 9 is lowered and driven using the annular frame 8 as a guide. In addition,
In this embodiment, the steel pipe pile 9 is divided into upper and lower two pile members 9a and 9b, and is welded at the abutting portion as shown in FIG.

In this case, as shown in FIGS. 15 and 16, the upper end of the steel pipe pile 9 (the upper pile member 9a) held by the steel pipe holding device at the final stage of the driving of the steel pipe pile 9 is attached to the upper end of the steel pipe pile 9. In order to avoid bending deformation due to insufficient strength and to support the subsequent steel pipe press-fitting machine 7, for example, a cover member 17 provided with a support portion 17a formed of a And the support portion 17a is used to support the steel pipe press-fitting machine 7 when the next steel pipe pile 9 'driving process is started (see FIGS. 17 to 21). In addition, in this embodiment, in order to press-fit the steel pipe pile 9 to its pile driving height 18, an auxiliary pile (Yatco) 19 is finally mounted on the annular frame 8 as shown in FIG. 17. Used for press fitting.

With such a configuration, a compact and lightweight press-fitting machine 7 for steel pipes, which can be carried in, carried out and moved by a crane, into a pile driver.
Can be used and can be adapted to severe construction sites. In addition, there is an entrance to and exit from the existing yacht harbor in the middle of the construction line, and even under construction conditions where the construction line is interrupted, the crane, particularly the floating crane from the sea, makes it easy to move the steel pipe press-fitting machine 7. Can be done.
If the steel pipe pile is held by using the steel pipe holding device of the present invention and the steel pipe pile is driven, even if there is an obstacle such as a bridge above the construction line at the time of the pile driving, the steel pipe joint is formed. Can be reduced, the construction time can be shortened, and high economic efficiency can be exhibited.

In this embodiment, the clamp claw 1
0 may be a pad type which is directly mounted on the inner peripheral wall of each of the frames 8a and 8b. This is because the steel pipe pile 9 is suspended by a crane, and is moved vertically from the front of the construction line 3 to the rear, and is introduced into the steel pipe holding device 8.
Since it is possible to clamp, the ring member 9X provided on the outer periphery of the lower end of the steel pipe pile 9 does not need to pass through the inside of the steel pipe holding device as in the related art.
The size of the frame 8 is approximately the same as the outer diameter of the steel pipe pile 9.
This is because the holding inner diameter according to a and 8b can be designed and manufactured.

Therefore, unlike the related art, there is no need to provide a structure in which each clamp claw is advanced and retracted in the radial direction of the steel pipe pile by hydraulic pressure, so that the structure can be simplified and the control system can be controlled by the hydraulic cylinder 1.
Only two controls are required, which is extremely simple.

[0023]

The present invention has been described in detail above. When a steel pipe pile is continuously driven along a predetermined construction line, the steel pipe to be driven is removed from its outer periphery. In the steel pipe holding device to be clamped, an annular frame equipped with a clamp claw on the inner periphery is composed of a fixed frame that can be opened and closed with respect to the horizontal direction, and a movable frame hinged to the fixed frame. The steel pipe to be guided is guided into the annular frame by horizontal movement from the open side of the annular frame, and the outer circumference is clamped by clamp claws, so that an obstacle such as a bridge is placed on the construction line. Even if there is, pile driving work can be performed using a steel pipe pile having a considerable length, and the number of steel pipe joints can be reduced as much as possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing a preparatory step for explaining a casting method using a steel pipe pile holding device of the present invention.

FIG. 2 is a plan view of the press machine for steel sheet piles.

FIG. 3 is also a side view.

FIG. 4 is a plan view showing the next preparation step.

FIG. 5 is also a side view.

FIG. 6 is a side view when the preparation process is completed.

FIG. 7 is a plan view showing a state in which the preparation step is completed.

FIG. 8 is also a side view.

FIG. 9 is a side view showing an embodiment of the holding device of the present invention.

FIG. 10 is also a plan view.

FIG. 11 is a plan view showing the main step of the construction method using the holding device of the present invention.

FIG. 12 is also a side view.

FIG. 13 is a side view showing the progress.

FIG. 14 is a side view showing the connection of the steel pipe piles.

FIG. 15 is a plan view showing the following process.

FIG. 16 is also a side view.

FIG. 17 is a side view showing the final driving state of the steel pipe pile.

FIG. 18 is also a side view of the completed state.

FIG. 19 is a side view showing the state of movement of the steel pipe press-fitting machine in the construction line direction.

FIG. 20 is a side view showing a state where the driving of the next steel pipe pile is started.

FIG. 21 is a side view showing the next process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press-fitting machine for steel sheet piles 2 Counterweight 3 Construction line 3a Required position 4 Steel sheet piles for reaction force 5 Supporting steel material 6 Guide frame material 7 Press-fitting machine for steel pipes 8 Annular frame 8a Fixed frame (holding member) 8b Movable frame (holding) 9, 9 'Steel pipe pile 9a, 9b Pile member 10 Clamp claw 11 Hinge pin 12 Hydraulic cylinder 13 Connector 14 Receiver member 15 Connection pin 16 Nozzle 17 Cover member 17a Supporting part 18 Pile driving height 19 Auxiliary pile (Yatco)

Claims (2)

[Claims] 1. A steel pipe holding device for clamping a steel pipe to be driven from an outer periphery thereof when driving a steel pipe pile continuously driving a steel pipe pile along a predetermined construction line,
The annular frame equipped with clamp claws on the inner periphery is composed of a fixed frame which can be opened and closed with respect to the horizontal direction, and a movable frame hinged to the fixed frame. A steel pipe holding device for driving steel pipe piles, wherein the steel pipe holding device is guided in the annular frame by horizontal movement from an open side of the steel pipe and is clamped by a clamp claw. 2. The fixed frame is a semicircular holding member on the rear side of the construction line, and is hinged to the fixed frame so as to be open to the front of the construction line. The steel pipe holding device for driving a steel pipe pile according to claim 1, wherein the steel pipe holding device is constituted by a semicircular arc-shaped holding member.