JP2769481B2 - Existing pile pulling casing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of existing pile pulling casing devices.

[0002]

2. Description of the Related Art Conventionally, as an existing pile pulling device, a pipe for feeding jet water has been passed through a speed reducer mounted on a leader, and water has been fed into a casing. Therefore, even considering the structure of the reducer, the maximum pressure of the jet water is 3
0kg / c

If not, the reduction gear may not be able to endure and may be damaged.

Further, in the conventional apparatus, it takes a long time to drill holes even in the case of the hard ground, even in the case of the existing short pile due to the pressure of the jet water. The same was true for medium and long piles. Further, when drilling for a long time as described above, the same amount of water treatment as in the vibro jet method was required.

[0004]

SUMMARY OF THE INVENTION The present invention is different from the conventional existing pile pulling apparatus, in that high pressure jet water having a high water pressure can be fed, and drilling of hard ground can be performed in a very short time. That can be processed in the second,
Third, the load on the reducer attached to the leader was reduced, and the base machine could be constructed with a general-purpose machine. Third, the use of multiple pipes allowed the washing of the drawn pile to be washed outside the direct injection nozzle Fourth, the high-pressure jet injection nozzle is equipped with a check valve integrated nozzle (Japanese Patent Application No. 2-93).
No. 317), the clogging of the nozzle when drilling was stopped was eliminated, and fifthly, the high-pressure jet water injection pipe was separated from the reducer, enabling the use of high-pressure jet water. It has a great number of outstanding advantages.

[0005]

According to the present invention, a plurality of pipes, which penetrate a pin attached to the center of an upper portion of a casing constituting a pile pulling-out device and feed high-pressure jet water while waterproofing, are connected. The swivel joint having the above configuration is mounted on the upper part of the casing separately from the speed reducer mounted on the leader, and is mounted on the existing pile pulling casing device.

[0006]

The operation of the present invention will be described below.

The pile pulling machine is installed horizontally, and the casing is aligned with the pile core. The speed reducer mounted on the weight reader is started, and the attached casing is rotated up and down at a predetermined speed while moving up and down in accordance with the ground to drill holes.

Although the casing rotates as described above, in the present invention, the swivel joint is kept stationary and is mounted separately without passing through the inside of the reduction gear, so that the durability of the reduction gear is reduced. High-pressure jet water can be used without consideration, so it is reliably cut by high-pressure jet water that injected the frictional force between the casing and the ground,
The drilling time could be shortened.

Further, as described above, when the casing is rotated via the speed reducer, when high-pressure jet water is fed through a pipe attached to the outside of the casing, the casing is located at the opening at the lower part of the casing. High pressure jet water is injected from the check valve integrated nozzle. At that time, since the casing is rotating at a predetermined speed, the frictional force generated between the casing and the ground is cut by the high-pressure jet water, and the drilling of the ground by the drilling blade is performed at a speed lower than the drilling speed of the conventional casing. Could also be significantly reduced.

Further, in the present invention, since the pipe for sending high-pressure jet water is protected by a cover,
No damage during drilling.

In the present invention, in the case of a check valve integrated nozzle mounted on a lower pipe mounted on the outside of the casing, for example, when four nozzles are provided, two of the nozzles are directed downward (straight nozzles). For cutting the ground at the tip of
The other two are slanted inward for pile cleaning. Therefore, the check valve integrated nozzle of the present invention has the function of cutting the ground and cleaning the existing pile.

As described above, in the present invention, high-pressure jet water is injected from a check valve integrated nozzle at the tip of a pipe,
At the same time, the tip ground was cut while washing the piles, so high-pressure jet water cut the frictional force between the casing and the ground, and the drilling speed was significantly reduced compared to the conventional casing.

Further, according to the present invention, there is no danger that the nozzle is clogged even if the drilling is temporarily stopped by the check valve integrated nozzle that injects high-pressure jet water.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

1 is an upper portion of the casing a, 2 is a side wall portion,
3 is a lower part, and 4 is an opening. Reference numeral 5 denotes a flange for connecting the casing a. A high-pressure O-ring 6 is wound around the flange 5. 7 is a connector for the flange 5, 8
Is a reinforcing flange, and 9 is a pin attached to the center of the upper part 1 of the casing a. Reference numeral 10 denotes an ultra-high pressure swivel joint for waterproofing the pin 9 so as to penetrate it. A high-pressure hose 11 for feeding high-pressure jet water is connected to the swivel joint 10. The swivel joint 10 does not rotate even if the casing a rotates.
Numeral 12 is connected to the swivel joint 10 mounted on the upper portion 1 of the casing a, and is located outside the side wall portion 2 and inside the outer diameter of the flange 5 and further reaches outside slightly above the opening portion 4. Is a pipe for sending high-pressure jet water. 13 is a cover for protecting the pipe 12. A plurality of the pipes 12 with the covers 13 mounted as described above are attached to the outer periphery of the casing a at predetermined intervals. Reference numeral 14 denotes a nozzle integrated with a check valve attached to the tip of the pipe 12, and in the present invention, Japanese Patent Application No. 2-93331.
No. 7 nozzle is used. For example, two of the four nozzles are directed downward (straight nozzles) to cut the ground at the tip of the casing a. The other two are slanted inward for cleaning the pile b. Reference numeral 15 denotes an excavating blade, which is mounted on the outer periphery of the opening 4 at predetermined intervals and at a predetermined inclination angle. 16 is a window hole formed in the casing a, 17 is a water tank, 18 is a pump device, and 19 is a pipe.

C is a crawler crane, 20 is a crawler,
Reference numeral 21 denotes a boom, reference numeral 22 denotes a wire, and reference numeral 23 denotes a leader mounted on the tip of the boom 21. Reference numeral 25 denotes a fixed arm for fixing the leader 23. The pin 9 attached to the upper part of the casing a and the speed reducer 24 are connected to bore.

D is a rough terrain crane, and boom 2
6. The wire 27 is attached. After drilling, the crane d pulls the pile b by hanging a wire on the head of the pile b.

[0018]

The present invention has the following effects.

A swivel joint having a structure in which a plurality of pipes through which a high-pressure jet water is fed while waterproofing is passed through a pin attached to the center of the upper part of the casing and attached thereto is attached to a leader above the casing. Separated from the reducer, the swivel joint is kept stationary, and the jet is injected from the check valve integrated nozzle at the end of the pipe, so that the frictional force between the casing and the ground can be cut. The drilling speed is extremely shorter than the drilling speed of the casing, and the drilling work efficiency is significantly improved, and the construction cost can be reduced.

Further, according to the present invention, since the inside of the speed reducer is made independent without penetrating the pipe for feeding high-pressure jet water, the load on the speed reducer can be reduced, and the base machine can be constructed with a general-purpose machine. It has the advantages that it can.

Further, according to the present invention, a direct injection nozzle and a cleaning nozzle for cleaning a drawn pile can be set.

Further, in the present invention, since the check valve integrated nozzle is mounted, the clogging of the nozzle when the drilling is stopped can be eliminated.

Further, the separation of the high-pressure jet water injection nozzle from the speed reducer makes it possible to use higher-pressure jet water, and has many other advantages.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a casing used in a casing device for pulling out an existing pile according to the present invention.

FIG. 2 is a front view of the casing.

FIG. 3 is a partially cutaway front view of the casing.

FIG. 4 is a partially cutaway front view showing a connection state between the casing and the pump device.

FIG. 5 is a side view of the crawler crane showing a state before drilling by a casing is disclosed.

FIG. 6 is a diagram showing a state during drilling.

FIG. 7 is a diagram showing a state in which drilling is completed.

FIG. 8 is a view showing a state where a casing is pulled out.

FIG. 9 is a diagram showing a state where a wire is hooked on an upper pile and a pile is pulled out in cooperation with a rough terrain crane.

FIG. 10 is a view showing a state in which the pile is cut, the upper pile is turned down, and the lower pile is supported.

FIG. 11 is a diagram showing a state immediately before lowering the lower pile.

[Explanation of symbols]

a ... casing 1 ... upper part 2 ... side wall part 3 ... lower part 4 ... opening part 5 ... flange 6 ... O-ring 7 ... connection tool 8 ... Reinforcing flange 9 ... Pin 10 ...
Swivel joint 11 ・ ・ ・ High pressure hose 12, 19 ・ ・ ・ Pipe
13 ... Cover 14 ... Check valve integrated nozzle 15 ... Drilling blade
16 ... window hole 17 ... water tank 18 ... pump device b ...
Pile c: Crawler crane 20: Crawler
21, 26 ... boom 22, 27 ... wire 23 ... leader
24: reducer 25: fixed arm d: rough terrain crane

Claims (1)

(57) [Claims] 1. A swivel joint having a configuration in which a plurality of pipes that penetrate a pin attached to the center of an upper portion of a casing constituting a pile pulling-out device and feed high-pressure jet water while providing waterproofing are connected. An existing pile pull-out casing device, which is mounted above a casing separately from a speed reducer mounted on a leader.