JP2724131B2 - Cylindrical pile and press-fitting method of cylindrical pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical pile used for pile driving using a water jet method and a method for press-fitting a cylindrical pile.

[0002]

2. Description of the Related Art In general, there is known a press-fitting method in which a structure such as a pile or a sheet pile is driven into a ground by press-fitting without being hit or vibrated. According to the above press-fitting method, vibration, noise, and the like can be suppressed to an extremely low level, and the influence on the surroundings can be suppressed as much as possible.

In order to press-fit a pile or a sheet pile, a high pressure is required. For example, a hydraulic device capable of applying a high pressure is required. However, depending on the condition of the ground and the shape of the pile or the sheet pile, In some cases, it is difficult to press-fit with a hydraulic device. Conventionally, in such a case, the water jet method was sometimes used in combination with the press-fitting method. That is, the water jet can be ejected downward from the lower end of the pile or sheet pile, and the water jet is ejected, and the pile or the sheet pile is pressed in while excavating the ground with the water jet. The pressure required for

[0004] For example, as shown in FIG.
When press-fitting, the water pipes 3 connected to the water jet pump via the jet hose 2 are arranged in the steel pipe sheet pile 1, and the jet ports (jet nozzles) 4 at the distal ends of the water pipes 3 are connected. It is attached to the inside of the lower end of the steel pipe sheet pile 1 in a state facing downward. Then, as described above, the water jet is jetted from the jet port 4 to make the steel pipe sheet pile 1.
The steel pipe sheet pile 1 is pressed into the ground while excavating earth and sand below the lower end of the steel pipe.

[0005]

The water spouted from the spout 4 becomes muddy by excavating the ground and accumulates in the steel pipe sheet pile 1. Then, the water collected in the steel pipe sheet pile 1 overflows from the upper end opening of the steel pipe sheet pile 1. Therefore, there is a possibility that the accumulated water in the steel pipe sheet pile 1 may be scattered to the surroundings, and there is a possibility that the surrounding workers and various types of mechanical equipment may be exposed to the water.

Further, as described above, the water overflowing from the steel pipe sheet pile 1 contains excavated earth and sand, and not only wets the surroundings but also pollutes it. In addition, depending on the situation at the site, there is a possibility that water accumulated in the steel pipe sheet pile 1 may splash on surrounding private houses, and in such a case, it has been difficult to use the jet method.

[0007] The present invention has been made in view of the above circumstances, and when driving a tubular structure (cylindrical pile) such as a steel pipe sheet pile using a jet method, water overflowing from the cylindrical pile is used. It is an object of the present invention to provide a tubular pile and a method of press-fitting the tubular pile, which can prevent the surroundings from being wetted or soiled.

[0008]

According to a first aspect of the present invention, there is provided a cylindrical pile, which is formed by ejecting a water jet downward and driven into the cylindrical pile. A water jet spout provided at the upper end of the cylindrical pile main body, and a closed part closing the internal space of the cylindrical pile main body above the water jet spout, and an internal space below the closed part of the cylindrical pile main body. The provision of a drain pipe is a means for solving the above problem.

According to the above configuration, since the internal space of the cylindrical pile is closed by the closing portion above the water jet outlet of the cylindrical pile, the water jetted from the outlet is You cannot go above the obstruction.
In addition, since the drainage pipe communicating with the internal space below the closed part of the cylindrical pile main body is provided, the water accumulated below the closed part of the cylindrical pile main body is discharged by the drainage pipe. .

Therefore, when the cylindrical pile is driven by the jet method, it is possible to prevent the water from overflowing and scattering from the upper end of the cylindrical pile. In addition, since almost all of the mud generated by the jet method can be guided to a desired place by a drain pipe, the influence of dirt or the like by the mud can be completely prevented, and the mud can be easily treated. be able to.

The cylindrical pile body may be of any configuration as long as it is a cylindrical structure and is driven into the ground, and is not limited to a cylindrical shape, and may be a square cylindrical shape. Also,
The material of the tubular pile main body is not particularly limited, and a steel material, precast concrete, or the like can be used.
In addition, the closing member is basically provided at a portion above the spout of the tubular pile main body so that water spouted from inside the lower portion of the cylindrical pile main body does not overflow from the upper end opening of the tubular pile main body. What is necessary is just what is arrange | positioned so that the internal space of a cylindrical pile main body may be divided up and down, or what is provided in the upper end surface of a cylindrical pile main body and closes the opening of the upper end of a cylindrical pile main body.

According to a second aspect of the present invention, in the cylindrical pile, the closing portion closes an upper end opening of the cylindrical pile main body.
A water stop plate detachably attached to an upper end surface of the cylindrical pile body, a connection pipe provided in the water stop plate so as to penetrate the water stop plate, and connecting the drainage pipe; A solution to the above problem is to provide a water plate with a water guide pipe provided through the water stop plate so as to penetrate the water stop plate and supplying a water jet to the water jet outlet.

According to the above construction, the water blocking plate is attached to the upper end surface of the tubular pile main body so as to close the upper end opening of the tubular pile main body. Water can be prevented from overflowing and scattering from the upper end side of the cylindrical pile body. In addition, since the water stop plate is detachably attached to the tubular pile main body and the connection pipe and the water guide tube are provided on the water stop plate, by attaching the water stop plate to the water stop plate, the water jet plate can be easily used. Equipment can be installed. Also, after the driving of the cylindrical pile is completed,
By removing the removable water stop plate, the connection pipe and the water guide tube provided on the water stop plate can be removed, so that the water jet equipment inside the tubular pile main body can be easily removed.

The drain pipe connected to the connection pipe and the jet hose connected to the water pipe and supplying high pressure water for water jet to the water pipe may be removed before removing the water stop plate. Then, the whole water stop plate may be removed while being connected to the water stop plate. In addition, when the water pipe is lifted to remove the water pipe together with the water stop plate, the water jet spout shall be lifted together with the water pipe, and by lifting the water jet spout, the water jet spout will be lifted. The connection with the cylindrical pile body may be released. With such a configuration, by removing the water blocking plate, the water jet spout can also be removed from the tubular pile main body.

According to a third aspect of the present invention, in the cylindrical pile, the closed portion is disposed so as to divide the internal space of the cylindrical pile body into upper and lower portions inside the lower part of the upper end of the cylindrical pile body. A water stop plate detachable from the tubular pile body, a connection pipe provided in the water stop plate so as to penetrate the water stop plate, and connecting the drainage pipe; A water guide pipe that is provided in a state penetrating the water stop plate, and supplies a water jet to the water jet spout, and a ring-shaped water stop body disposed on an outer peripheral portion of the water stop plate. The water stop body is made of an elastic member having a hollow inside, and is maintained in a state in which the outer peripheral surface of the water stop body and the inner peripheral surface of the tubular pile body are in close contact by injecting and expanding a fluid into the inside. This is a means for solving the above problem.

According to the above configuration, the water blocking plate of the closing portion is disposed below the upper end of the cylindrical pile main body so as to divide the internal space of the cylindrical pile main body up and down.
Water can be prevented from overflowing and scattering from the upper end side of the cylindrical pile body as in the configuration of the first aspect. In addition, the water stop plate is detachable from the tubular pile main body, and the water stop plate is provided with the water guide pipe and the connection pipe.
Water jet equipment inside the cylindrical pile body can be easily removed in the same manner as the described configuration.

Further, according to this configuration, the water stop plate is removably disposed inside the cylindrical pile main body, and the water stop plate is disposed between the outer peripheral surface of the water stop plate and the internal peripheral surface inside the cylindrical pile main body. Although there is a possibility of water leakage, the water stopping body arranged on the outer peripheral portion of the water stopping plate holds the outer peripheral surface and the inner peripheral surface of the tubular pile body in close contact with each other, thereby preventing water leakage. be able to. Further, as described above, since the water blocking plate is disposed so as to divide the internal space of the cylindrical pile main body up and down inside the lower part of the upper end of the cylindrical pile main body, In the portion above the plate, the internal space of the cylindrical pile body is open upward.

Therefore, in the portion of the cylindrical pile main body above the water stop plate, the internal space of the cylindrical pile main body opened upward can be used. For example, when driving the cylindrical pile main body, the press-fitting machine can grasp the cylindrical pile main body from the inside of the cylindrical pile main body. Further, by making the press-fitting machine grip the cylindrical pile main body from the inside of the cylindrical pile main body, it becomes possible to drive the cylindrical pile to just before the upper end of the cylindrical pile main body. In some cases, it is possible to bury the entire cylindrical pile.

That is, when the cylindrical pile main body is grasped from the outside of the cylindrical pile main body by the press-fitting machine when the cylindrical pile main body is driven, the cylindrical pile main body of the press-fitting machine is gripped. The clogged portion of the tubular pile body cannot be buried under the ground, whereas the clogged portion cannot be buried under the ground. If the cylindrical pile main body can be grasped from above, it becomes possible to drive the cylindrical pile to just before the upper end of the cylindrical pile or to bury the entire cylindrical pile.

According to a fourth aspect of the present invention, there is provided a method for press-fitting a cylindrical pile, wherein the cylindrical pile according to the first, second or third aspect is used. After attaching the water jet spout and drainage pipe, the cylindrical pile body is pressed into the ground, the water jet is spouted from the water jet spout, and the muddy water accumulated in the cylindrical pile body due to the water jet spout is removed. After draining from the drainpipe, and then press-fitting the cylindrical pile body,
The removal of the closed portion is a means for solving the above problem.

According to the above construction, water is prevented from overflowing from the upper end of the tubular pile and scattered, and the inside of the tubular pile is drained by the drain pipe. Since the accumulated water can be guided to a desired place, the working environment can be prevented from deteriorating. In addition, when the cylindrical pile according to claim 2 or 3 is used, after the press-fitting of the cylindrical pile is completed, by removing the closed portion, a water jet such as a connection pipe for a water guide pipe or a drain pipe is provided. Equipment can be easily removed, and the closed part can be easily reused and used.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylindrical pile and a method for press-fitting the cylindrical pile according to a first embodiment of the present invention will be described below.
In the first example, a case where a steel pipe sheet pile is used as the cylindrical pile will be described. However, any cylindrical pile may be used as long as it is cylindrical and is driven into the ground.

FIGS. 1 and 2 show a cylindrical pile 10 of the first example. As shown in FIG. 1, the cylindrical pile 10 of the first example
Has a well-known steel pipe sheet pile 11 serving as a cylindrical pile main body, and a closing portion 20 that divides the internal space of the steel pipe sheet pile 11 into upper and lower parts at the upper part of the steel pipe sheet pile 11. The closing portion 20 includes a water stop plate 21 that vertically divides the internal space of the steel pipe sheet pile 11, a drain connection pipe 22 provided in the water stop plate 21 so as to penetrate the water stop plate 21, 21 is the water stop plate 2
1, a water-guiding connection pipe 23 provided to penetrate through, a water-stopping body 24 provided at an outer peripheral portion of the water-stop plate 21,
And lifting pieces 25, 25 for lifting and moving.

The water stop plate 21 includes two upper and lower disks 21.
a and 21b, and a connecting cylinder 21C for connecting the upper and lower two disks 21a and 21b. The discs 21a and 21b
Has a diameter slightly smaller than the inner diameter of the steel pipe sheet pile 11. A cylindrical rib 21d projecting upward along the outer periphery of the disk 21a is provided on the upper part of the outer periphery of the upper disk 21a. A cylindrical rib 21e protruding downward along the outer periphery of the disk 21b is provided.

The connecting cylinder 21C has its upper end connected to the center of the upper disk 21a and its lower end connected to the center of the lower disk 21b.
b are kept parallel to each other in a separated state. The drain connection pipe 22 is disposed so that the two circular plates of the water stop plate 21 penetrate inside the connection tube 21 </ b> C, and is formed of the steel pipe sheet pile 11 divided vertically by the water stop plate 21. It communicates with the interior space.

The drain connection pipe 22 does not leak at the junction with the water stop plate 21. The lower end of the drain connection pipe 22 is open on the lower surface of the water stop plate 21. On the upper end side of the drain connection pipe 22, a drain coupler 22a for detachably connecting a drain pipe (shown in FIG. 3) 30 described later is provided.

The water guide connection pipe 23 is arranged and connected to the water stop plate 21 in substantially the same manner as the drain connection pipe 22. A jet coupler 23a for detachably connecting a jet hose 31 (shown in FIG. 3), which will be described later, is provided at an upper end of the water guide connection pipe 23. In addition, a connecting portion 23b for connecting a water guiding pipe 32 described later is provided at a lower end portion of the water guiding connecting pipe 23.

The upper end of the water guide tube 32 is relatively firmly connected to the connection portion 23b, so that the water guide tube 32 can be removed together with the closing portion 20 as described later. And the closed part 20 and the water pipe 32 are substantially integrated. The water stopping body 24 is a ring-shaped rubber tube, and can be expanded by injecting a fluid such as air or water into its internal space.

The water stopping body 24 is provided with the water stopping plate 2.
The upper and lower disks 21a and 21b are arranged so as to surround the connection tube 21c. And
When the water stopping body 24 is inflated, the outer peripheral surface of the water stopping body 24 comes into contact with the inner surface of the steel pipe sheet pile 11 to fill the space between the outer peripheral surface of the water stopping sheet 21 and the inner peripheral surface of the steel pipe sheet pile 11. ing.

Therefore, the water blocking member 24 allows the closing portion 2
0 is in close contact with the inner surface of the steel sheet pile 11,
The closing part 20 can be divided into upper and lower parts in a state where the inner space of the steel pipe sheet pile 11 is waterproof. In addition, the water stopping body 24 is provided with a fluid inlet / outlet valve 24 a in a state of penetrating the disk 21 a on the upper side of the water stopping plate 21. Injectable.

The closing portion 20 is mounted on a plurality of lower stopper plates 33 arranged at intervals along the circumferential direction on the inner peripheral surface of the steel pipe sheet pile 11, and the upper side is formed on the lower side. It is in a state of being held down by upper stopper plates 34 arranged in the same manner as the stopper plates 33. That is, the stopper plate 33,.
1 is supported in the internal space at the upper end.

The stopper plates 33,.
Are welded to the inner surface of the steel sheet pile 11 and the upper stopper plates 34 can be removed when the water stop plate 21 is lifted upward to remove the closed portion 20. It has become. When driving the cylindrical pile 10 using the water jet method,
A drain pipe 30 is connected to a drain coupler 22a at an upper end of the drain connection pipe 22, and a jet hose 31 is connected to a water coupler 23a at an upper end of the water connection pipe 23.

A water pipe 32 is connected to a connection portion 23b at a lower end of the water connection pipe 23, and a jet port (jet nozzle) 35 is connected to a lower end of the water pipe 32. Further, the jet port 35 is joined to a socket 36 fixed to an inner surface of a lower end portion of the steel pipe sheet pile 11 by a fixing pin 37. In addition, the fixing pin 37 is in a state capable of shearing when the water guide pipe 32 and the jet port 35 connected to the water guide pipe 32 are pulled up together with the closing part 20.

Next, a method of press-fitting the cylindrical pile 10 will be described. The cylindrical pile 10 is press-fitted into the ground by a well-known press-fitting and extracting machine 40 shown in FIG. The pile press-in / pull-out machine 40 includes a saddle 42 having a plurality of clamps 41 for gripping the cylindrical piles 10 built in parallel on the ground, and a slide portion provided on the saddle 42 so as to be slidable back and forth. 43, a revolving part 44 provided on the sliding part 43 so as to be revolvable to the left and right, and a pile provided on the front part of the revolving part 44 so as to be slidable up and down, and to be driven or to be pulled out And an elevating body 46 having a chuck 45 that can be held.

The press-in and pull-out machine 40 grasps the pile already driven into the ground by the clamps 41.
By taking a reaction force from the stake and holding the stake to be driven into the chuck 45, the lifting body is moved down the 46,
Pile can be press-fitted. The clamp 41
... are designed to open the outside while being inserted into the steel pipe sheet pile 11, thereby gripping the steel pipe sheet pile 11.

In the cylindrical pile 10 before being pressed into the press-in / pull-out machine 40, first, the lower stopper plates 33 are welded to the inner surface of the upper part of the steel pipe sheet pile 11 and the lower end of the steel pipe sheet pile 11 is welded. The socket 36 is welded to the inner surface of. Next, the closing part 20 is set on the lower stopper plate 33.

Next, an upper stopper plate 34 is welded to the inner surface of the steel pipe sheet pile 11 above the closed portion 20.
The water stop plate 21 of the closing portion 20 is fixed inside the upper end of the steel pipe sheet pile 11. Next, by injecting a fluid into the water stop 24 from the valve 24a of the water stop 24, the water stop 2
4 is inflated so that the outer peripheral surface of the closed portion 20 and the inner peripheral surface of the steel pipe sheet pile 11 are brought into close contact with each other to prevent water from passing therethrough, that is, the gap between the closed portion 20 and the steel pipe sheet pile 11 is sealed.

Further, the ejection port 35 is joined to the socket 36 by a fixing pin 37, and the ejection port 35 is fixed to the lower end portion in the steel pipe sheet pile in a state of being directed downward. Next, the drain pipe 30 is connected to the drain coupler 22a of the drain connection pipe 22, and the jet hose 3 is connected to the jet coupler 23a of the water connection pipe 23.
1 is connected. Then, the cylindrical pile 10 equipped with the water jet equipment is set in a press-in / draw-out machine 40 as shown in FIG. High-pressure water is supplied from a water jet pump (not shown) through the water supply pipe 31 and the water pipe 32, and a water jet is jetted from the jet port 35.

In FIG. 3, only one water connection pipe 23 is provided in the closing portion 20 of FIGS. 1 and 2, and two jet hoses 31 and two water transmission pipes 3 are provided.
2 shows the cylindrical pile 10 in a state where it is attached. As described above, the force required to press-fit the tubular pile 10 can be reduced by press-fitting the tubular pile 10 with the pile press-in / pull-out machine 40 using the water jet.

By using the water jet as described above, water containing the degree of excavation will accumulate inside the cylindrical pile 10, but at the upper end of the cylindrical pile 10, the internal space of the cylindrical pile 10 Is closed by the closing portion 20, so that water accumulated in the cylindrical pile 10 does not overflow from the upper end of the cylindrical pile 10 and scatter. Therefore,
It is possible to prevent the periphery of the driven cylindrical pile 10 from getting wet or dirty. In addition, the pile press-in and pull-out machine 40 and other machines, equipment, vehicles, and the like arranged around the cylindrical pile 10 can be prevented from getting wet or dirty. Further, in the case where there is a private house close to the site where the cylindrical pile is driven, it is possible to prevent water including excavated soil from splashing on the private house.
Therefore, the water jet can be used even at a site close to a private house.

Further, the water accumulated in the cylindrical pile 10 is drained by the drain pipe 30 through the drain connection pipe 22 penetrating the water blocking plate 21 of the closing portion 20.
The internal pressure is not increased, and water does not blow out from the periphery of the tubular pile 10 onto the ground. Further, as described above, the water containing the excavation degree can be directly sent to the muddy water treatment system through the drainage pipe 30, and the wastewater treatment can be facilitated.

The closing portion 20 is disposed inside the steel pipe sheet pile 11 below the upper end of the steel pipe sheet pile 11, so that the internal space of the steel pipe sheet pile 11 above the closing portion 20 is opened upward. Therefore, the steel pipe sheet pile 11 can be press-fitted to its upper end and buried in a state where the closing portion 20 is installed, as described later. In the press-fitting of the steel pipe sheet pile 11 by the pile press-in pull-out machine 40, the pile press-in pull-out machine 40
When the steel pipe sheet pile 11 is gripped from the outside and press-fitted by the chuck 45, the portion of the steel pipe sheet pile 11 caught by the chuck 45 cannot be press-fitted below the ground.

Accordingly, the steel pipe sheet pile 11 is held by the chuck 45.
Even if the steel pipe sheet pile 11 is pressed in while the upper end of the steel pipe sheet pile 11 is gripped, the upper end portion of the steel pipe sheet pile 11 caught by the chuck 45 cannot be pressed below the ground. In order to press the steel sheet pile 11 deeper than that, as shown in FIG. 4, a chuck 45a capable of gripping the upper end of the steel pipe sheet pile 11 from the inside is used. The portion caught by 45a can also be pressed below the ground.

However, in order to use the chuck 45a, the internal space at the upper end of the steel pipe sheet pile 11 must be opened upward, and when the internal space of the steel pipe sheet pile 11 is closed by the closing portion 20, The closing portion 20 needs to be installed below the upper end as described above. Then, as described above, one cylindrical pile 10 is formed using a water jet.
After the press-fitting is completed, the closing portion 20 is removed as follows. First, the upper stopper plate 34 welded to the steel pipe sheet pile 11 is removed, and fluid is drained from the valve 24 a of the water stopping body 24. Next, the hanging piece 25,
The wire is attached to 25, the wire is attached to the chuck 45 of the press-fitting / pulling-out machine 40, and the closing unit 20 is pulled up by moving the elevating body 46 upward.

At this time, the water pipe 32 attached to the water connection pipe 23 of the closing portion 20 and the jet port 35 attached to the tip of the water pipe 32 are also pulled up. Then, as described above, the closing part 20 is
When the is lifted, the fixing pin 37 fixing the jet port to the socket 36 is sheared. Then, the press-fitting and extracting machine 40
The closed part 20, the water pipe 32, and the spout 35 that have been lifted up by are recovered, and the removal of the closed part 20 from the steel pipe sheet pile 11 is completed.

As described above, when removing the closed portion 20, basically, the closed portion 20 is pulled up from the inside of the steel pipe sheet pile 11, so that the water supply connection pipe 23 and the drainage connection pipe 22 of the closed portion 20 and the closed portion 20 are removed. Can be collected at a time. That is, water jet equipment can be easily removed from the steel sheet pile 11 and collected.

Next, a cylindrical pile and a method of press-fitting the cylindrical pile according to the second embodiment of the present invention will be described. In the second example, the same components as those in the first example are denoted by the same reference numerals, and description thereof is omitted.

FIGS. 5, 6, 7 and 8 show a cylindrical pile 50 of the second example. 5, 6, 7, and 8
As shown in the figure, the cylindrical pile 50 of the second example is a well-known PC (precast concrete) wall 51 serving as a cylindrical pile main body.
In the upper end surface of the PC wall 51, the PC wall 51
And a closing portion 60 that closes the upper end opening of the opening. The PC wall 51 is a substantially quadrangular cylindrical pile having an internal cavity 51a, and can be constructed in a concrete wall-like structure by connecting and driving in parallel with the upper part being exposed. For example, when the PC wall 51 is driven in parallel to the seawall, the PC wall 51 functions as a sheet pile for retaining the earth, and the PC wall 51 itself is used as the seawall. Is configured.

As shown in FIGS. 7 and 8, a steel plate having a hole communicating with the internal space of the PC wall 51 (the upper end in the figure) is provided at the upper end and the lower end of the PC wall 51. Are shown) 52, and the steel plates 52 are connected to each other by PC (prestressed concrete) steel (not shown),
The PC wall 51 is in a prestressed state. As shown in FIG. 5, a box-shaped shoe 53 is attached to the lower end of the PC wall 51.

As shown in FIGS. 6, 7 and 8, the closing portion 60 has a water blocking plate 61 for closing the upper end opening of the PC wall 51, and the water blocking plate 61 penetrates the water blocking plate 61. The drain connection pipe 22 provided so as to be
, A sheet-like packing 62 provided on the lower surface of the water blocking plate 61, and suspending pieces 63, 63 for lifting and moving the closing portion 60.
And

The water stop plate 61 is basically made of the PC wall 51.
Is a steel plate corresponding to the planar shape of the upper end face of
.. Are detachably fixed to the upper end surface of the PC wall 51. The bolts 64 are screwed into screw holes (not shown) of the steel plate 52 at the upper end of the PC wall 51 while penetrating the water stop plate 61 and the packing 62.

The screw hole is for joining the PC steel material to the steel plate 52, and the upper end of the PC steel material is screwed into the lower part of the screw hole. That is, the water stop plate 61 is joined to the PC wall 51 using the screw holes originally provided in the PC wall 51. The drain connection pipe 22 and the water connection pipe 23 are fixed to the water stop plate 61 as in the case of the first example, and the drain connection pipe 22 is provided with a drain coupler 22a. A coupler 23a and a connecting portion 23b are provided.

The connecting pipe 23b is connected to the water pipe 32 (shown in FIG. 5), and the lower end of the water pipe 32 is connected to a jet port 35 (shown in FIG. 5). Also,
The jet port 35 is attached to a rib (not shown) of the box-shaped shoe 53 of the PC wall 51. In addition,
The spout 35 is, as in the case of the first example, provided with the water pipe 32.
When it is lifted up together, it can be removed from the box-type shoe 53.

Next, a method for press-fitting the cylindrical pile 50 will be described. The cylindrical pile 50 is press-fitted into the ground by a press-fitting / pulling-out machine 40 shown in FIG. 9 substantially similar to the press-fitting / pulling-out machine 40 of the first example. Then, in the tubular pile 50 before being pressed into the press-in / pull-out machine 40, first, the water stop plate 61 and the packing 62 of the closing portion 60 are moved to P by bolts 64.
The spout 35 is attached to the box-type shoe 53 of the PC wall 51 while being fastened and fixed to the upper end surface of the C wall 51.

Next, the drain coupler 22a of the drain connection pipe 22
And a jet hose 31 is connected to the jet coupler 23a of the water guide connection pipe 23. Then, the cylindrical pile 50 to which the water jet equipment is attached is set in the press-fitting / pulling-out machine 40 as shown in FIG. High-pressure water is supplied from a water jet pump (not shown) through the
5 spouts a water jet.

As described above, when the cylindrical pile 50 is press-fitted by the pile press-in / pull-out machine 40 using a water jet, the water accumulated in the cylindrical pile 50 is filled in the same manner as in the first example. The same effect as that of the first example can be obtained without overflowing from the upper end of 50 and scattering. Further, in the cylindrical pile 50 in which the press-fitting is completed, the drain pipe 30 and the jet hose 31 are detached from the closing portion 60, and the bolts 64 fastening the water blocking plate 61 of the closing portion 60 are removed. By pulling up the closing portion 60 in the same manner as in the first example, the closing portion 60, the water pipe 32, and the jet port 35 can be integrally removed.

[0057]

According to the first aspect of the present invention,
When driving a cylindrical pile using the jet method, water can be prevented from overflowing and scattering from the upper end of the cylindrical pile. It can be prevented from getting wet or dirty. Also,
Even when there is a private house in the vicinity of the site, the private house is not wetted or soiled, so that the pile driving using the jet method can be performed. In addition, since almost all of the muddy water generated by the jet method can be guided to a desired place by a drain pipe, the influence of dirt or the like due to the muddy water can be completely prevented, and the treatment of the drainage can be facilitated. be able to.

According to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and water jet equipment can be easily mounted inside the cylindrical pile body. In addition, the water jet equipment can be easily removed from the cylindrical pile body. That is, the installation, removal and recovery of the water jet equipment and drainage treatment can be performed easily and quickly, so that the work efficiency can be improved.

According to the structure of the third aspect of the present invention, the same effect as that of the first or second aspect is obtained, and the water stop plate is provided in the lower part of the upper end of the cylindrical pile main body. Since the internal space of the cylindrical pile main body is arranged so as to be divided vertically, in a portion above the water stop plate of the cylindrical pile main body, the state in which the internal space of the cylindrical pile main body is opened upward. Therefore, the internal space of the cylindrical pile main body that is open upward can be used in a portion above the water stop plate of the cylindrical pile main body.

For example, when driving the cylindrical pile main body, the press-fitting machine can grasp the cylindrical pile main body from the inside of the cylindrical pile main body. And it is also possible to bury the entire cylindrical pile. Further, even when the closing portion is disposed inside the cylindrical pile main body as described above, water leakage can be easily prevented by the water blocking body. According to the fourth aspect of the present invention, the same effects as those of the first, second or third aspect can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first example of a cylindrical pile according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing the cylindrical pile of the first example.

FIG. 3 is a side view of the cylindrical pile showing a method of press-fitting the cylindrical pile of the first example.

FIG. 4 is a longitudinal sectional view of a main part of the cylindrical pile showing a method of press-fitting the cylindrical pile of the first example.

FIG. 5 is a longitudinal sectional view showing a cylindrical pile according to a second embodiment of the present invention.

FIG. 6 is a plan view showing the cylindrical pile of the second example.

FIG. 7 is a longitudinal sectional view of a main part showing the cylindrical pile of the second example.

FIG. 8 is a side view of a main part showing the cylindrical pile of the second example.

FIG. 9 is a side view of a cylindrical pile showing a method of press-fitting the cylindrical pile of the second example.

FIG. 10 is a longitudinal sectional view of a cylindrical pile showing a conventional method of press-fitting the cylindrical pile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylindrical pile 11 Steel sheet pile (cylindrical pile main body) 20 Closure part 21 Waterproof plate 22 Drainage connection pipe 23 Water conduction connection pipe 24 Waterproof body 30 Drainage pipe 31 Jet hose 32 Water conduction pipe 35 Spout port 40 Pile press-in / draw-out machine 50 cylinder Pile 51 PC wall (tubular pile body) 60 Closed part 61 Water stop plate

Claims (4)

(57) [Claims] 1. A cylindrical pile which is driven by jetting a water jet downward, and is driven into the cylindrical pile main body; a water jet outlet provided in a lower portion of the cylindrical pile main body; A tube, comprising a closing portion that closes the internal space of the cylindrical pile main body above the outlet, and a drain pipe communicating with the internal space below the closing portion of the cylindrical pile main body. Shaped pile. 2. A water blocking plate removably attached to an upper end surface of a cylindrical pile body so that the closing portion closes an upper end opening of the cylindrical pile body. It is provided in a state penetrating the water plate, and
A connection pipe for connecting the drainage pipe, provided on the water stop plate so as to penetrate the water stop plate, and
The cylindrical pile according to claim 1, further comprising: a water pipe for supplying a water jet to the water jet outlet. 3. The cylindrical pile main body is disposed below the upper end of the cylindrical pile main body so as to divide the internal space of the cylindrical pile main body up and down, and is detachable from the cylindrical pile main body. A water stop plate, provided in the water stop plate so as to penetrate the water stop plate, and
A connection pipe for connecting the drainage pipe, provided on the water stop plate so as to penetrate the water stop plate, and
A water guide pipe for supplying a water jet to the water jet spout, and a ring-shaped water stop disposed on an outer peripheral portion of the water stop plate, wherein the water stop is formed of a hollow elastic member. The outer peripheral surface of the water blocking body and the inner peripheral surface of the cylindrical pile body are kept in close contact with each other by injecting a fluid into the interior and expanding the fluid. The cylindrical pile described. 4. A method for press-fitting a cylindrical pile using the cylindrical pile according to claim 1, 2 or 3, wherein the closing section, the water jet spout, and the drain pipe are provided in the cylindrical pile main body. After mounting, the cylindrical pile body is pressed into the ground, and a water jet is jetted from the water jet outlet, and muddy water accumulated in the cylindrical pile body due to the jet of the water jet is discharged from a drain pipe, A press-fitting method for a tubular pile, comprising: removing the closed portion after the press-fitting of the tubular pile main body is completed.