WO2019044939A1

WO2019044939A1 - Pile press-in apparatus and pile press-in method

Info

Publication number: WO2019044939A1
Application number: PCT/JP2018/032043
Authority: WO
Inventors: Akio Kitamura
Original assignee: Giken Ltd.
Priority date: 2017-09-04
Filing date: 2018-08-30
Publication date: 2019-03-07
Also published as: CN109423996A; JP2019044483A; CN207582463U

Abstract

A pile press-in apparatus is shown. A chuck apparatus 2 is provided in a pile press-in apparatus which presses-in a steel tubular pile in a ground by obtaining reaction force from existing steel tubular piles. The chuck apparatus 2 includes a chuck unit 4, a hydraulic motor 34, and a gear 35. The chuck unit 4 is a chuck unit which holds the steel tubular pile. The hydraulic motor 34 and the gear 35 are rotating units which continuously rotate the chuck unit 4 in at least one rotating direction to be able to continuously rotate the steel tubular pile held by the chuck unit 4 in at least one rotating direction.

Description

PILE PRESS-IN APPARATUS AND PILE PRESS-IN METHOD

The present invention relates to a pile press-in apparatus and a pile press-in method.

Conventionally, as described in Patent Literature 1, as an apparatus to install a steel tubular pile in hard ground, there is a three-point type pile driver in which an auger is passed through a steel tubular pile, and the auger drills the ground at the lower edge of the steel tubular pile while pressing the steel tubular pile.

Japanese Utility Model Registration No. 2561559

In the three-point pile driver as described in the Patent Literature 1, the weight of the apparatus itself is used as the reaction force. Therefore, in order to obtain a larger reaction force, it is inevitable that the size of the apparatus becomes larger. If the apparatus becomes larger, although a larger reaction force can be obtained, a certain amount of space including height is necessary to position the apparatus.

The purpose of the present invention is to obtain strong reaction force to efficiently press-in piles without making the apparatus larger.

According to an aspect of the present invention, there is a pile press-in apparatus which performs press-in of a pile into a ground by obtaining reaction force from an existing pile or sheet pile, the pile press-in apparatus including: a chuck apparatus; and a raising/lowering unit which raises/lowers the chuck apparatus, wherein the chuck apparatus includes, a chuck unit which holds the pile, and a rotating unit which rotates the chuck unit in at least one rotating direction continuously to be able to continuously rotate the pile held by the chuck unit in at least one rotating direction, and wherein in a state in which the reaction force is obtained from the existing pile, while continuously rotating the chuck unit holding the pile in at least one rotating direction with the rotating unit, the chuck apparatus is raised/lowered with the raising/lowering unit to press-in the pile into the ground while rotating the pile in at least one rotating direction continuously.

According to another aspect of the present invention, there is a pile press-in method using the pile press-in apparatus according to claim 1 to press-in a pile into a ground by obtaining reaction force from existing piles, the method including: raising/lowering the chuck apparatus by the raising/lowering unit while continuously rotating the chuck unit holding the pile in at least one rotating direction with the rotating unit in a state obtaining reaction force from the existing pile; and pressing-in in the ground the pile while continuously rotating in at least one rotating direction.

According to the present invention, reaction force is obtained from existing piles to press-in piles into the ground. Therefore, a large reaction force, that is, a large press-in force can be obtained without making the pile press-in apparatus larger. Further, a pile held by a chuck is pressed into the ground while continuously rotating in at least one rotating direction. Therefore, resistance when the pile is pressed-in can be reduced to support press-in of the pile. With this, the pile can be pressed-in more efficiently. Further, rotating steel tubular piles which are provided with wings or ridges on the outer circumference can be easily pressed into the ground.
The press-in apparatus according to the present invention is an apparatus which obtains reaction force from existing piles. Therefore, the apparatus can be configured to be small and light, and construction on water, slopes and narrow ground is possible.

FIG. 1 is a side view showing a press-in apparatus and a cross-sectional view showing a portion of a chuck apparatus according to an embodiment of the present invention. FIG. 2A is a planar view showing the chuck apparatus. FIG. 2B is an enlarged view showing a power rail and a power collecting brush shown in FIG. 2A. FIG. 3 is a schematic diagram showing an open end steel tubular pile when there is one nozzle according to a reference invention (upper left shows an entire diagram, lower left shows a base view of the pile, upper right shows a side cross-sectional view and base view of the pile tip). FIG. 4A is a schematic diagram showing an open end steel tubular pile when there are four nozzles according to the present invention. FIG. 4B is a schematic diagram showing an open end steel tubular pile when there are four nozzles according to the present invention. FIG. 5 is a schematic diagram showing an open end steel tubular pile when there is one pipe for water injection and there are four nozzles with an annular pipe near the tip of the pile. FIG. 6 is a schematic diagram (side cross-sectional view and base view) and enlarged diagram of the tip (side-cross sectional view and base view) showing an open end steel tubular pile when a tip drill blade is attached in the reference invention with one nozzle. FIG. 7A is a schematic diagram showing a state ejecting fluid from a nozzle according to a method of the present invention. FIG. 7B is a schematic diagram showing a state in which there is fluid between the steel tubular pile inner wall and sediment, and/or the fluid and the sediment are mixed according to the present invention. FIG. 8 is a conceptual diagram showing action according to the present invention. FIG. 9 is a diagram showing an open end steel tubular pile with an outer side friction cutter and a tip drill blade fixed according to the present invention. FIG. 10 is a front view describing a method to construct a steel tubular pile. FIG. 11 is a cross-sectional diagram of line In-In shown in FIG. 10. FIG. 12 is a cross-sectional diagram of line IIn-IIn shown in FIG. 10. FIG. 13 is a descriptive diagram showing example 3. FIG. 14 is a descriptive diagram showing example 4. FIG. 15 is a descriptive diagram showing example 5. FIG. 16 is a planar view showing an embodiment of a reaction force stand according to the present invention. FIG. 17 is a side view showing an embodiment of the reaction force stand according to the present invention. FIG. 18 is a front view showing an embodiment of the reaction force stand according to the present invention. FIG. 19A is a diagram to describe a pile press-in apparatus according to an embodiment of the present invention and a press-in method of a block member using a block member attachment. FIG. 19B is a diagram to describe a pile press-in apparatus according to an embodiment of the present invention and a press-in method of a block member using a block member attachment. FIG. 19C is a diagram to describe a pile press-in apparatus according to an embodiment of the present invention and a press-in method of a block member using a block member attachment. FIG. 20A is a planar view showing a holding portion of the block member attachment. FIG. 20B are planar views showing a holding portion of the block member attachment. FIG. 21 is a diagram to describe a press-in method of the block member. FIG. 22 is a diagram to describe a press-in method of the block member. FIG. 23A is a planar view showing a modification of a holding portion of the block member attachment. FIG. 23B is a planar view showing a modification of a holding portion of the block member attachment. FIG. 23C is a planar view showing a modification of a holding portion of the block member attachment. FIG. 24 is a side view showing a configuration of the press-in apparatus according to an embodiment of the present invention. FIG. 25 is a planar view of the press-in apparatus shown in FIG. 24 viewed from above and a horizontal cross-sectional view of a main chuck frame. FIG. 26 is a front view of the press-in apparatus shown in FIG. 24 viewed from the front. FIG. 27 is a planar view showing a configuration of a sub-chuck frame and a sub-chuck attached to a mast. FIG. 28 is a planar view showing a configuration of a sub-chuck with the hold of the pressed-in pile released. FIG. 29 is a planar view showing a configuration of a sub-chuck with the pressed-in pile held. FIG. 30A is a diagram showing a lowering process of a pressed-in pile by the press-in apparatus. FIG. 30B is a diagram showing a lowering process of a pressed-in pile by the press-in apparatus. FIG. 31A is a diagram showing a lowering process of a pressed-in pile following FIG. 30B. FIG. 31B is a diagram showing a lowering process of a pressed-in pile following FIG. 30B. FIG. 32A is a diagram showing a lowering process of a pressed-in pile following FIG. 31B. FIG. 32B is a diagram showing a lowering process of a pressed-in pile following FIG. 31B. FIG. 33A is a diagram showing a lowering process of a pressed-in pile following FIG. 32B. FIG. 33B is a diagram showing a lowering process of a pressed-in pile following FIG. 32B. FIG. 34A is a diagram showing a lowering strike process of a pressed-in pile by the press-in apparatus. FIG. 34B is a diagram showing a lowering strike process of a pressed-in pile by the press-in apparatus. FIG. 35 is a planar view showing embodiment 1 of a sediment retaining wall according to the present invention. FIG. 36 is a side view showing embodiment 1 of a sediment retaining wall according to the present invention. FIG. 37 is a side view showing a configuration of an embodiment of a self-propelled adapter applying the present invention. FIG. 38 is a diagram showing a step to press-in the steel tubular pile to a predetermined depth. FIG. 39 is a diagram showing a step to build a lowering strike apparatus in the steel tubular pile. FIG. 40 is a diagram showing a step to press-in the steel tubular pile to a planned height. FIG. 41 is a diagram showing a step to remove a lowering strike apparatus and to build a self-propelling adapter in the steel tubular pile. FIG. 42 is a diagram showing a step to build a lowering strike apparatus in a latch portion in a rear of the self-propelled adapter. FIG. 43 is a diagram showing a step to release the clamp of the pile press-in apparatus and to raise the pile press-in apparatus. FIG. 44 is a diagram showing a step to move forward the pile press-in apparatus in the amount of one pitch of the clamp and to connect the clamp to the latch of the self-propelled adapter. FIG. 45A is a planar view showing an example of pressing in a pile or a sheet pile composing a sheet pile and a raking pile which suppresses displacement of the sheet pile wall using a constructing method of the sediment retaining wall according to the present invention. FIG. 45B is a side view showing FIG. 45A. FIG. 46A is a planar view showing an example of pressing in a pile or a sheet pile composing a sheet pile wall and a rotating press-in steel tubular pile as a raking pile which suppresses displacement of the sheet pile wall using a constructing method of the sediment retaining wall according to the present invention. FIG. 46B is a side view showing FIG. 46A. FIG. 47A is a side cross-sectional view of a continuous steel tubular sheet pile fitting a male joint with a female joint. FIG. 47B is a side cross-sectional view showing joint structures other than FIG. 47A. FIG. 47C is a side cross-sectional view showing joint structures other than FIG. 47A. FIG. 48 is a diagram describing a press-in apparatus according to an embodiment of the present invention and a press-in method of a block member using a block member attachment.

An embodiment of the present invention is described with reference to the drawings. The description below shows an embodiment of the present invention and is not meant to limit the scope of the present invention.

(0) Basic Configuration of Press-in Apparatus
The press-in apparatus common in all of the embodiments includes, a saddle, a clamp which is provided below the saddle and which holds an existing pile or sheet pile, a slide base which moves to the front and back freely with respect to the saddle, a mast which rotates to the left and the right freely on the slide base, a chuck apparatus which is attached on the front face of the mast and which is raised and lowered freely, and a main hydraulic cylinder (lift) which drives the chuck apparatus to be raised and lowered with respect to the mast. The chuck apparatus includes a rotating unit (rotating chuck unit) which holds the pile and rotates. The chuck apparatus basically includes the function to press-in the pile while rotating and the function to press-in the pile without rotating. The press-in apparatus holds the pile or the lowering strike apparatus and uses its own driving force to be able to move on the completed piles in the direction of progress of the press-in construction.
The pile press-in apparatus has the above-described basic configuration. The apparatus is able to have additional features and modified features as described below. The apparatus is also able to perform the methods of construction as described below.

(1)
An embodiment of the present invention is described with reference to FIG. 1 and FIG. 2. The reference numerals are described in FIG. 1 and FIG. 2.
FIG. 1 is a side view showing the pile press-in apparatus according to the present invention, and a portion of the chuck apparatus is shown as a cross-sectional view. FIG. 2A is a planar view of a chuck apparatus. FIG. 2B is an enlarged diagram of a power rail and a power collecting brush shown in FIG. 2.
As shown in FIG. 1 and FIG. 2A, the chuck apparatus 1 according to an embodiment of the present invention is provided in a pile press-in apparatus 10 which obtains reaction force from a steel tubular pile P existing in the ground and presses in a steel tubular pile P in the ground.
Similar to a conventional pile press-in apparatus, the pile press-in apparatus 100 includes a saddle 3 in which a clamp 2 which holds an existing steel pile P is provided in a lower portion of the saddle 3, a slide base 4 which slides to the front and the back with respect to the saddle 3, a turning unit 5 which turns on the slide base 4, and a chuck apparatus 1 provided in front of the turning unit 5. At the tip of the turning unit 5, two guide grooves 52 which extend in a vertical direction are provided with the opening side facing each other and with a space in between.

The chuck apparatus 1 includes an apparatus main body 6, and a rotating unit 7 which is held inside the apparatus main body 6 to be rotatable with respect to the apparatus main body 6. The apparatus main body 6 includes an annular portion 61 formed to project to the front (right side in FIG. 1) and formed so that a hole penetrates in the vertical direction. The apparatus main body 6 is attached to a vertical hydraulic cylinder 51. The apparatus main body 6 is driven vertically by the vertical hydraulic cylinder 51, and with this, the apparatus main body 6 can be raised and lowered.

A projection 62 which projects to the turning unit 5 side is formed in the apparatus main body 6. A ridge 63 extends in the vertical direction in both left and right edges of the projection 62. The ridges 63 are provided projecting in directions separating from each other. The projection 62 is positioned between two guide grooves 52 of the turning unit 5. The two ridges 63 are fit in the two guide grooves 52 to be able to slide in the vertical direction. With this, the direction of movement of the apparatus main body 6 is limited to the vertical direction.

A u-shaped guide 65 opened toward the inside of the annular portion 61 is provided in the surroundings of the annular portion 61 of the apparatus main body 6. A hydraulic motor 66 is provided inside the apparatus main body 6 on the turning unit 5 side (left side in FIG. 1). A gear 67 which is driven and rotated by the hydraulic motor 66 is provided below the hydraulic motor 66.

The hydraulic devices such as the vertical hydraulic cylinder 51 and the hydraulic motor 66 are driven supplied with oil through a hydraulic hose (not shown) from a hydraulic supplying device (not shown) provided on the ground.

The rotating unit 7 is a tubular shape, and is positioned on the inner side of the annular portion 61 of the apparatus main body 6 so that the hole penetrates in the vertical direction as shown in FIG. 2A. A turning gear 68 in a shape projecting toward the outside is provided on the upper edge of the rotating unit 7.

The turning gear 68 is positioned inside the u-shaped guide 65. With this, the movement of the rotating unit 7 in the vertical and horizontal directions is controlled. The turning gear 68 is engaged with the gear 67 below the hydraulic motor 66 in the turning unit 5 side. When the gear 67 is driven and rotated with the hydraulic motor 66, the rotating unit 7 continuously rotates around the axis of the rotating section 7 as the substantial center.

As shown in FIG. 2A, four electric actuators 81 (driving unit) which can extend toward the center are provided in the rotating unit 7 with substantially even intervals between in the circumferential direction. A chuck 9 to hold the steel tubular pile P is provided in the four electric actuators 81. The four electric actuators 81 press the inner side of the rotating unit 7, and the steel tubular pile P can be pinched and held at the inner side of the rotating unit 7.

Conductive power rails 82 which supply power to drive the electric actuator 81 are aligned in three lines vertically and attached along a circumferential direction of the rotating unit 7 on the outer circumferential surface of the rotating unit 7 in the portion linked with the apparatus main body 6.
As shown in FIG. 2B, the three power rails 82 are connected by penetrating the base through a bar shaped linking member 83 vertically and attached to the outer circumferential surface of the rotating unit 7.
The power rail 82 includes a circular shaped rail 84 attached along the circumferential direction of the rotating unit 7 and a circular conductor holding member 86 which is fitted in the rail 84 and which holds the conductor 85 inside. The rail 84 and the conductor holding member 86 have insulation properties.
An opening 86a is formed in the conductor holding member 86 and a circular conductor 85 is stored inside along the conductor holding member 86. Wiring 89b (see FIG. 2A) connected to each electric actuator 81 is connected to the conductor 85 conductively.
The power collecting brush 87 is inserted in the opening 86a of the conductor holding member 86 to come into contact with such conductor 85.

The power collecting brush 87 has conductivity, projects downward from the lower surface of the apparatus main body 6 on the turning unit 5 side, and is attached aligned in three rows vertically to an attaching unit 64 provided facing the power rail 82 (see FIG. 1). The tip of the power collecting brush 87 comes into contact with the conductor 85 of the power rails 82. The number of rows of the power collecting brush 87 is not limited to three rows and may be any number of rows such as four rows or five rows.
Wiring 89a connected to a generator 88 (power supply) provided on the ground is provided in the base of the power collecting brush 87. That is, after the wiring 89a is provided from the generator 88, through the turning unit 5 and then on the outer circumferential surface of the apparatus main body 6, the wiring 89a is connected to the base of the power collecting brush 87.
As described above, the wiring 89a connected from the generator 88 to the power collecting brush 87 and the wiring 89b connected from the power rail 82 to the electric actuator 81 are independent structures which do not pass the linking portion between the apparatus main body 6 and the rotating unit 7.

Regarding the power output from the generator 88, after the power is conducted to the power collecting brush 87 through the wiring 89a positioned in the turning unit 5, the power is conducted to the power rail 82 in contact with the tip of the power collecting brush 87, and further, the power is supplied to the electric actuators 81 through the wiring 89b connected to the power rail 82. The electric actuators 81 are driven with this power.
The rotating unit 7 is provided with a receiver 99 for wireless communication, and control signals regarding the operation in the rotating unit 7 (operation of the electric actuator 81, etc.) and operation of the press-in apparatus main body are transmitted from an external transmitting controller (not shown). The power to the receiver 99 is supplied through the power collecting brush 87 and the power rail 82.

Next, the pile press-in method to press-in the steel tubular pile P in the ground with the pile press-in apparatus 100 according to the present embodiment is described. The press-in apparatus 100 performs press-in of the new steel tubular pile P in a state holding the existing steel tubular pile P with the clamp 2 to obtain reaction force from the existing steel tubular pile P.

First, when the generator 88 is driven and the power is supplied to the power collecting brush 87 through the wiring 89a, the power rail 82 in contact with the tip of the power collecting brush 87 is conducted and the electric actuator 81 is conducted through the wiring 89b.
With this, the electric actuator 81 is driven and the chuck 9 presses the steel tubular pile P in a direction to pinch the steel tubular pile P so that the steel tubular pile P is held at the chuck 9. In this state, the chuck apparatus 1 is lowered with the vertical hydraulic cylinder 51, and the hydraulic motor is driven to rotate the chuck 9 in at least one rotating direction. For example, that is, the chuck 9 is continuously rotated to the right, continuously rotated to the left or continuously rotated in a continuous rotation to the right and a continuous rotation to the left, the direction as shown in FIG. 2A. With this, the steel tubular pile P held by the chuck 9 is continuously rotated in at least one rotating direction and pressed into the ground.

While the rotating unit 7 and the chuck 6 are rotating, the power rail 82 rotates along the circumferential direction with respect to the fixed power collecting brush 87 with the power collecting brush 87 in contact with the conductor 85 of the power rail 82, and the power can always be supplied. Since the wiring 89a and the wiring 89b are not provided across the liking portion between the apparatus main body 6 and the rotating unit 7, the rotating unit 7 can rotate freely.

Next, when the chuck apparatus 1 is lowered to the lowest position that the chuck apparatus 1 can be lowered by the vertical hydraulic cylinder 51, the hold of the steel tubular pile P by the electric actuator 81 is released.
Then, the chuck apparatus 1 is raised by the vertical hydraulic cylinder 51, and then the electric actuator 81 is driven again. The steel tubular pile P is held by the electric actuator 81.
When the steel tubular pile P is held by the chuck 9 again, similar to the above, the steel tubular pile P is pressed-in deeper to the ground while rotating. This operation is repeated so that the steel tubular pile P is pressed-in to the depth determined in advance.

According to the present embodiment, the conductive power rail 82 is provided on the outer circumferential surface of the rotating unit 7 along the circumferential direction at the linking portion between the apparatus main body 6 and the rotating unit 7. The conductive power collecting brush 87 is provided in the apparatus main body 6 so as to be able to come into contact with the conductor 85 of the power rail 82. The power rail 82 is connected by wiring to the electric actuator 81 of the rotating unit 7, and the power collecting brush 87 is connected by wiring to the generator 88 provided outside. Therefore, when the power collecting brush 87 comes into contact with the conductor 85 of the power rail 82, the power from the generator 88 is supplied to the electric actuator 81. With this, when the electric actuator 81 drives the chuck 9, the chuck 9 holds the steel tubular pile P and together with the rotation of the rotating unit 7, the steel tubular pile P is pressed into the ground while rotating.
Since the steel tubular pile P is pressed-in while the chuck 9 rotates, the resistance during the pile press-in can be reduced to support the press-in of the steel tubular pile P, and the steel tubular pile P can be pressed-in efficiently. A rotating steel tubular pile provided with a blade or a ridge on the outer circumference can be pressed into the ground.
As described above, according to the present invention, even if the energy used to drive the chuck 9 is electric power, the power from the generator 88 can be directly supplied to the electric actuator 81 without using the battery as the source to supply power as in conventional examples. Therefore, there is no need to use time for charging, and enough power can always be supplied from the generator 88.
Moreover, when the output of the power is raised, the power can be sufficiently supplied from the generator 88, and there is no need to make the battery larger as in conventional examples.
Further, according to the present invention, the power rail 82 is connected by wiring with the electric actuator 81, the power collecting brush 83 is connected by wiring to the generator 88, and the wiring 89b of the power rail 82 or the wiring 89a of the power collecting brush 87 is provided in the apparatus main body 6 or the rotating unit 7. The

wiring

89a and 89b are independent configurations. Therefore, problems such as the

wiring

89a and 89b in the linking portion rotating with the rotation of the rotating unit 7 do not occur. The electric actuator 81 is certainly conducted by the contact between the power rail 82 and the power collecting brush 87 without limiting the rotating range of the rotating unit 7.

The present invention is not limited to the above embodiment, and modifications are possible without leaving the scope of the present invention. For example, the power collecting brush 87 is attached to the apparatus main body 6 side and the power rail 82 is attached to the rotating unit 7, but alternatively, the power rail 82 can be attached to the apparatus main body 6 side and the power collecting brush 87 can be attached to the rotating unit 7. Specifically, the power rail 82 can be attached along the circumferential direction on the inner circumferential surface of the apparatus main body 6, the power collecting brush 87 can be attached to one location of the outer circumferential surface of the rotating unit 7 fit in the apparatus main body 6, and the tip can come into contact with the power rail 82. Similar to the above embodiment, even in such modification, the wiring 89b of the power rail 82 and the wiring 89a of the power collecting brush 87 are independent configurations. Therefore, the power can be certainly provided to the electric actuator 81 by the contact between the power collecting brush 87 and the power rail 82 without limiting the rotating range of the rotating unit 7.

The shape of the power rail 82 and the power collecting brush 87 is not limited to the illustrated examples, and the configuration can be suitably modified as long as the power rail 82 and the power collecting brush 87 can be conducted.
The number of electric actuators 81 is not limited to four.

(2)
An embodiment of the present invention is described with reference to FIG. 3 to FIG. 9. The reference numerals are described in FIG. 3 to FIG. 9.
Due to the arch effect by the friction between the sediment entering in the steel tubular pile and the inner wall surface of the steel tubular pile, although depending on conditions of the constructing site, the position where the block by dirt in the tube starts is set up to 10 times the pile diameter from the pile tip, and the formed dirt blocking layer in the tube prevents further sediment from entering. Therefore, the steel tubular pile lower edge (also called the tip) in the typical rotating press-in has a pile tip with a substantially closed end.

According to a rotating press-in method using the open end steel tubular pile and the steel tubular pile, as shown in the schematic drawing of FIG. 8, fluid 13m is placed between the sediment entering the open end steel tubular pile 1 (hereinafter referred to as steel tubular pile 1) or fluid is mixed with the sediment near the inner wall of the steel tubular pile among the sediment entering the steel tube so as to be fluid mixed sediment 13m, or both processes are performed. With this, the circumferential surface frictional force 15m of the sediment in the steel tubular pile inner wall surface is reduced to prevent inner tubular sediment blockage layer 14m from being formed and to reduce resistance of penetration. As shown in FIG. 7A, in order to achieve the above, a fluid ejecting nozzle 3m is provided in the fluid supplying pipe 2m near the tip of the inner wall of the steel tubular pile in the sediment entering the steel tube. Among the sediment entering the steel tubular pile during the rotating press-in of the steel tubular pile, fluid is ejected by the tip drill blade 11m and the fluid supply pipe 2m in the space pressed-in the steel tube formed between the steel tubular inner wall and the sediment near the steel tubular pile inner wall. With this, as shown in FIG. 7B, when the fluid is ejected to the surface of the sediment which attempts to move toward the steel tube side again with the rotation and which is in contact with the steel tube inner wall, and the fluid and/or the fluid mixed sediment 13m is placed between the steel tube inner wall and the sediment 12m inside the steel tube, the friction with the steel tube inner wall surface is reduced. Even without the tip drilling blade 11m, the same effect can be achieved by the fluid ejecting nozzle 3m.

The basic configuration of the open end steel tubular pile is shown in FIG. 3. The fluid supplying pipe 2m is attached along the inner wall of the steel tubular pile 1 by welding, and the fluid supplying pipe 2m is connected to the swivel joint 5m above the steel tubular pile 1. In the upstream of the swivel joint 5m, piping which passes the fluid is provided. Further upstream, a water pump 7m and a water tank 8m are provided when the fluid is water or drilling liquid, and the fluid is supplied from the above. Since the swivel joint 5m is provided above the center axis of the steel tubular pile 1, the steel tubular pile 1m can be rotated even if the fluid supplying pipe 2m is welded to the inner wall of the steel tubular pile 1m. When air is used as the fluid, an air compressor and accessories are provided instead of the water pump 7m and the water tank 8m. When the fluid includes two fluids such as water and air, or drilling liquid and air, the water pump 7m and the water tank 8m are provided together with the air compressor and its accessories. The diagram shows a case in which a band shaped outer side friction cutter 6m is fixed near the tip of the steel tubular pile 1m, but this is not necessary.

Preferably, as shown in the upper left of FIG. 6, the fluid supplying pump 2m near the nozzle is made flat or has a small diameter to prevent breaking of the main body and to reduce the resistance of penetrating. Preferably, the emitted amount from the steel tube inner wall is reduced less than the fluid supplying pipe 2m from the upper portion to the middle portion.

Since the steel tubular pile 1m rotates, even if there is only one nozzle 3m as an ejecting opening of the fluid, the ejected material can be mixed in the entire surface of the sediment entering in the steel tube. By increasing the number of nozzles 3m in the circumferential direction, due to the relation with the press-in speed, the mixing can be performed within a short time efficiently. However, if the number increases to more than eight, the increase of efficiency does not match with the increase in costs. Therefore, preferably, the number of nozzles 3m in the circumferential direction is at least one and no more than eight.

There are four nozzles in the circumferential direction as shown in FIG. 4, and in such case, four fluid supplying pipes 2m are welded along the inner wall of the steel tubular pile 1m, and all four of the pipes 2m are connected to the swivel joint 5m above the steel tubular pile 1. According to FIG. 4A, the swivel joint 5m is fixed by the swivel joint pile upper portion fixing tool 9m so that the relative position in relation to the steel tubular pile 1m does not change. The portion upstream than the swivel joint 5m is provided with a fluid supplying apparatus similar to when there is one nozzle. As shown in FIG. 4B, when there is no swivel joint pile upper portion fixing tool 9m, the auxiliary hanging using a crane is necessary so that the relative position in relation to the steel tubular pile 1m does not change. When the rotating press-in is performed, the steel tubular pile 1m is typically held in the rotating press-in apparatus. Here, as the rotating press-in advances, the steel tubular pile 1m is lowered, and therefore, the piping upstream of the swivel joint 5m needs to be flexible piping 21m such as a hose.

The direction that the nozzle 3m points is also important. Since the ejecting direction of the nozzle 3m points in the circumferential direction along the inner wall of the steel tubular pile 1, the fluid can be efficiently mixed in the sediment near the inner wall of the steel tubular pile when the fluid is ejected. Therefore, only the sediment near the inner wall of the steel tubular pile can be loosened with a small amount of fluid, and the sliding friction force between the sediment and the inner wall surface of the steel tubular pile can be reduced. When the direction that the nozzle points is a direction opposite the rotating direction of the steel tubular pile 1m, the sediment entering the steel tubular pile prevents clogging of the nozzle 3m. Therefore, this is preferable (see middle right of FIG. 3).

Regarding the position where the nozzle 3m is provided, it is effective to provide the nozzle 3m in a position near the tip of the steel tubular pile in a range where the influence to the increase in penetrating resistance at the steel tubular pile tip becomes as small as possible. The sediment 12m entering the steel tube is shaken due to the influence of the rotation of the steel tubular pile 1m and the influence when there is a spiral enlarged wing or tip drilling blade 11m near the tip of the steel tubular pile. Therefore, reaction force of the rotation force of the pile from the surrounding ground spreading semi-infinitely around the steel tubular pile 1m cannot be obtained. The co-rotation of the steel tubular pile 1m and the entering sediment 12m occurs by the circumferential friction force in the steel tube. When the nozzle 3m is attached above the tip to reduce the penetrating resistance, if the distance from the steel tubular pile tip to the nozzle 3m is an upper portion in a distance of 1 to 10 times the diameter distance of the steel tubular pile, the sediment lower than the ejecting opening tends to form the inner tube sediment blockage layer 14m. This portion becomes the penetrating resistance and the effect drastically decreases. Therefore, the position of the nozzle 3m needs to be a position up to a distance corresponding to 10 times the diameter of the steel tubular pile above from the tip of the steel tubular pile 1m. More preferably, the position is above the tip in a distance corresponding to 5 times above, and even more preferably, the position is above the tip in a distance corresponding to 1 time above. The nozzle 3m can be provided in a plurality of positions within the above-described range of the nozzle position in the vertical direction of the fluid supplying pipe 2m.

As the configuration to supply fluid to the fluid ejecting nozzle 3m, preferably, the fluid supplying pipe 2m is provided as a downward piping vertical along the inner wall of the steel tubular pile 1m from the upper opening of the steel tubular pile from the viewpoint of reducing the penetrating resistance during rotating press-in. When the nozzle 3m is provided in two or more positions in the circumferential direction, since the number of fluid supplying pipes 2m as downward piping increases and the costs of processing increases, it is preferable to reduce the number of fluid supplying pipes 2m. A fluid supplying pipe 2m is provided along the inner wall of the steel tubular pile 1m midway from the upper edge of the steel tubular pile 1m, and an annular pipe 10m (see FIG. 5) is provided in the circumferential direction along the inner wall of the steel tubular pile 1m at the tip of the fluid supplying pipe 2m. From the bottom surface of the annular pipe 10m, a second fluid supplying pipe 23m is provided downward in at least one position and no more than eight positions along the inner wall of the steel tubular pile 1m. The tip position of the second fluid supplying pipe is provided in a position from the steel tubular pile tip to the position where the tubular sediment blockage layer starts. The second fluid supplying pipe 23m is provided with the fluid ejecting nozzles 3m for ejecting in the circumferential direction along the inner wall of the steel tubular pile from the tip of the second fluid supplying pipe to the position where the inner tubular sediment blockage layer starts in one or two or more positions. From the viewpoint of reducing costs regarding processing and construction, the number of fluid supplying pipes 2m provided is as small as possible, preferably one. However, when the ground is hard and the strength is weak with only one pipe, another fluid supplying pipe 2m can be provided on the other side to provide two pipes. When further strength is necessary, three or four fluid supplying pipes 2m can be provided. Preferably, the annular pipe 10m and the second fluid supplying pipe 23m are welded on the inner wall of the steel tubular pile from the view point of strength. FIG. 5 shows an example in which one fluid supplying pipe 2m is provided and four second fluid supplying pipes 23m are provided. The fluid supplying pipe 2m is attached along the inner wall of the steel tubular pile 1 by welding and the pipe 2m is connected to the annular pipe 10 near the tip of the steel tubular pile 1m. The nozzle 3m is attached in four positions through the second fluid supply pipe 23m at the lower side face of the annular pipe 10m. When the annular pipe 10m is welded, it is preferable that the position of attachment is toward the tip side of the steel tubular pile 1m as much as possible from the viewpoint of ease of processing. However, to avoid increase of the penetrating resistance, it is preferable that the very tip portion is avoided.

According to the above, the blocked state at the tip of the steel tubular pile can be removed and the end of the pile is not closed. The penetrating resistance due to the active wedge being formed at the bottom of the steel tubular tip can be reduced. Therefore, the rotating press-in becomes easy in the normal steel tubular pile without any processing at the tip or in the steel tubular pile in which the band shaped outer side friction cutter 6m which is normally used is merely fixed by welding at the tip, as shown in FIG. 3. Depending on the hardness of the ground in which the rotating press-in is performed, the tip drilling blade 11m as shown in FIG. 9 can be fixed at the tip of the steel tubular pile alone or together with the friction cutter 6m, or a spiral enlarged wing can be fixed. With this, the press-in resistance can be further reduced, and the rotating press-in becomes easier.

As the fluid to be used, the necessary effect can be obtained by water or air. It is preferable to use drilling liquid such as bentonite solution when the friction resistance between the sediment and the steel tubular pile inner wall surface is large. The nozzle 3m can be a two fluid nozzle, and water and air or drilling liquid and air can be ejected. The fluid and the sediment need to be mixed only near the steel tubular pile inner wall and the direction that the nozzle 3m points is in the circumferential direction along the inner wall of the steel tubular pile in order to enhance efficiency. With this, the pressure and the flow amount during ejecting can be reduced. The pressure is sufficient at 10 MPa or less, and is preferably 1 to 5 MPa considering saving costs. It is sufficient that the low pressure side (back surface side of the rotating direction) has equal to or more than the pressure loss to flow the fluid when the fluid piping is provided, and about 0.2 MPa or more is sufficient. The pressure loss changes depending on the steel tubular pile length and the flow amount of the fluid, and 0.5 MPa or more is preferable. The flow amount depends on the ground, diameter of the steel tubular pile, press-in speed, and number of rotations. If there is a flow amount of 3 to 10% (m3/min) of the pile volume (m3/min) rotated and pressed-in for each unit of time, there is an effect to reduce circumferential surface friction. For example, when the pile diameter is 900 mm and the press-in speed is 1.0 m/min, the pile volume rotated and pressed-in for each unit time is about 0.64 m3/min. Fluid needs to be ejected in the amount of about 0.019 to 0.064 m3/min, that is, about 19 to 64 l/min. Considering the pile diameter applied as the steel tubular pile and the facilities, it is preferable to set to 5 to 100 l/min, and more preferably, 10 to 50 l/min. The pressure can be reduced by 1/10 to 1/2 and the flow amount can be reduced by 1/12 to 1/3. Therefore, a large ancillary plant to supply fluid is not necessary, and this is excellent from the economic point of view.

(3)
The embodiment of the present invention is described with reference to FIG. 10 to FIG. 15. The reference numerals are described in FIG. 10 to FIG. 15. The present embodiment includes the following examples 1 to 5.
The present embodiment is a method to continuously establish a bank protection wall. Ancillary equipment such as a crane is positioned to be able to operate on the steel tubular pile line. The steel tubular pile line is established on a concrete bank protection wall using a steel tubular press-in apparatus which can rotate and press-in the steel tubular pile. Reaction force is obtained from the steel tubular pile line while the steel pile is continuously rotated and pressed-in the steel tubular pile line. With this, a continuous wall for bank protection is established.
The present embodiment is a method to enlarge the width of a river, etc. The continuous wall is established using the bank protection wall continuous establishing method as described above. Then, an apparatus to perform an enlarging process or an apparatus for a removal process is positioned on or near the steel tubular pile line. The sediment on the river side of the established continuous wall is removed or the bottom of the surrounding water is dredged.

FIG. 10 is a front view describing a method to establish the steel tubular pile according to the present example. FIG. 11 is a cross-sectional view along line I-I shown in FIG. 10, FIG. 12 is a cross-sectional view along line II-II shown in FIG. 10, FIG. 13 is a descriptive diagram showing an example 3, FIG. 14 is a descriptive diagram showing an example 4, FIG. 15 is a descriptive diagram showing an example 5.

The continuous establishing method of the bank protection wall according to the present example is described with reference to the drawings.
In FIG. 10, reference numeral 11n is a steel tubular pile press-in apparatus and is able to move by itself on the steel tubular pile line PLn. The reference numeral 12n shows a crane, 13n shows a conveying apparatus of the steel tubular pile, 14n shows a cart for conveying the steel tubular pile, 15n shows a dredging apparatus, and 0301n shows a power unit. All of these equipment can be moved on a rail 20n provided on the steel tubular pile line PLn. Pn shows the steel tubular pile. The power unit 0301n supplies power to other devices such as the steel tubular press-in apparatus 11n. The power unit 0301n is positioned between the steel tubular press-in apparatus 11n and the crane 12n.
The steel tubular pile line PLn continuously presses in the steel tubular pile Pn, and the steel tubular piles Pn and Pn can be pressed-in in contact with each other or can be pressed-in having a certain interval in between each other.

The continuous establishing method of the bank protection wall according to the present example is performed using the steel tubular pile press-in apparatus 11n, the crane 12n, and the steel tubular pile conveying apparatus 13n which are positioned on the steel tubular pile line PLn in which a plurality of steel tubular piles Pn, Pn are pressed-in continuously in a concrete bank protection wall 102n provided by a river.
When the steel tubular pile P is pressed-in, the above-described steel tubular pile press-in apparatus 11n is able to press-in the steel tubular pile Pn while rotating and at the same time, is also able to press-in the steel tubular pile Pn without rotating using only pressure from the above as in normal press-in apparatuses. As described above, since the steel tubular pile is pressed-in with rotation, large apparatuses such as an earth auger are not necessary, and operation can be performed rapidly.

First, the steel tubular pile press-in apparatus 11n is used, and the steel tubular pile Pn on the cart 14n is conveyed by the crane 12n positioned on the steel tubular pile line PLn and attached to the steel tubular pile press-in apparatus 11n. Then, the steel tubular pile press-in apparatus 11n is started, and the steel tubular pile Pn is continuously pressed-in the existing steel tubular pile P. The steel tubular pile Pn can be pressed-in in contact with the existing steel tubular pile Pn, or a certain distance can be set and pressed-in. The reaction force here is obtained by the steel tubular pile line PLn.
According to the present embodiment, in order to break through the concrete bank protecting wall 102n, a steel tubular pile for drilling including bits at the tip is used as the steel tubular pile. Such drilling steel tubular pile Pn is rotated and pressed-in to a supporting layer 109n. With this, the steel tubular pile line PLn, that is, the continuous wall is established.

Then, the concrete bank protecting wall 102n and sediment on the river 101n side of the established steel tubular pile line PLn is removed. Such removal is performed by a crusher (not shown) such as a breaker positioned on the steel tubular pile PL. With this, the width of the river 101n becomes wider, and the river can be used effectively.

Further, dredging of a river bottom 103n near the bank as shown in FIG. 11 is performed to widen the river. The dredging process is performed with a dredging operation apparatus 15n positioned on the steel tubular pile PLn. The position of this apparatus is not limited to positioning on the steel tubular pile Pn and can be positioned on the side.
After the removal of the concrete bank protecting wall 102n and the sediment, and the widening process of the river 101n ends, the surface of the steel tubular pile line PLn is covered with the decorative plate Kn.

According to the present embodiment as described above, repair work can be performed in a river in which the enlarging process could not be performed conventionally. In this case, the structure of the conventional bank protecting wall can be utilized. Therefore, the time period necessary for the work can be shortened, the costs can be reduced, and the steel tubular pile Pn becomes a strong strengthening member to strengthen the bank protecting wall.
Since the reaction force for press-in can be obtained by the steel tubular pile, the apparatus can be formed to be compact. Temporary work to perform the enlarging process is not necessary. Therefore, repair work of the concrete bank protecting wall can be performed safely and efficiently.
According to the present example, the river 101n is described. The above work can be used in a levee of a swamp or a lake, or a breakwater by the sea.

Next, the example 2 is described.
According to this example, similar to example 1, the drilling steel tubular pile Pn is pressed-in to the concrete bank protecting wall 102 while obtaining reaction force from the steel tubular pile line PLn. In this example, when the drilling steel tubular pile Pn breaks through the concrete bank protecting wall 102n and reaches a predetermined depth, the press-in stops.
Then, the steel tubular pile press-in apparatus 11n pulls out the drilling steel tubular pile Pn. A normal steel tubular pile Pn is positioned and pressed-in the drilled hole, and the steel tubular pile line PLn which is the continuous wall is established.

According to the present example, the effects as described in the above-described example 1 can be obtained, but further effects can also be obtained. That is, only the concrete bank protecting wall portion can be drilled with the drilling steel tubular pile, and then, a normal steel tubular pile, that is, the steel tubular pile without bits can be used for the press-in process in the sediment portion. With this, the costs of the work can be reduced.

Example 3 is shown in FIG. 13. The steel tubular pile Pn as described in example 1 or example 2 is pressed-in in the position to the river side than the upper edge of the concrete bank protecting wall 102n.
According to the present embodiment, the distance that the steel tubular pile P is pressed-in to the concrete bank protecting wall 102n becomes short. Therefore, the press-in can be easily performed, and the amount of sediment that is removed becomes a small amount. Moreover, the footing needs to be removed in only one portion, and the time period necessary for work can be shortened.

Example 4 is shown in FIG. 14. The bank protecting wall is established higher than the road. In such bank protecting wall, not only the river 101n side but also the concrete bank protecting wall and the sediment 105n on the road side is removed. With this, there is the merit that the road becomes wider.
In this case also, since all of the work is performed on the steel tubular pile PLn, there is no traffic caused by trucks for the work, and the traffic is not disturbed.

Example 5 is shown in FIG. 15. The steel tubular pile Pn is pressed-in the footing 108n of the base of the concrete bank protecting wall 107n. Such example is for the purpose of strengthening the existing bank protecting wall.

(4)
An embodiment of the present invention is described with reference to FIG. 16 to FIG. 18. The referred reference numerals are described in FIG. 16 to FIG. 18.
The configuration of the reaction force stand 1q according to the present embodiment is described on the basis of FIG. 16 to FIG. 18. FIG. 16 is a planar view showing an embodiment of the reaction force stand according to the present invention, FIG. 17 is a side view, and FIG. 18 is a front view.

In order to fix a clamp (not shown) of the pile press-in/pull-out apparatus, the reaction force stand 1q fixes two clamp fixing members 20q on the inner side of the parallel frames 10q. Further frames 12q, 14q, and 16q fix the clamp fixing member 20q. 40q in the drawing is the linking plate with the pressed-in pile 60q fixed to the front frame 16q.

An attachment 22q is fixed detachably to the inner side of the clamp fixing unit 20q. The attachment 22q is attached to match the diameter when the diameter of the clamp of the pile press-in/pull-out apparatus is different.
That is, the diameter of the clamp of the pile press-in/pull-out apparatus corresponds to the pile to be pressed-in. When the diameter of the pressed-in pile is changed, the diameter of the clamp fixing member 20q to provide the clamp of the pile press-in/pull-out apparatus needs to be changed. When the diameter of the pressed-in pile is changed, the different reaction force stand is not used. According to the present embodiment, one reaction force stand can be used for pressing in a plurality of pressed-in piles with various different diameters by changing the attachment 22q.

The attachment to the clamp fixing unit 20q of the attachment 22q is performed by fixing both sides of the attachment 22q with the fixing pin 24q penetrating through from the outside of the frame 10q. The attachment 22q is attached detachably by the fixing pin 24q and can be used for clamps with different diameters.

There are three pinching members 30q attached to the outer side of the parallel frames 10q. Such pinching member 30q pinches and releases a reaction force pile 50q as the reaction force body by extending and shortening of the internally mounted hydraulic cylinder. According to such pinching member 30q, the reaction force pile 50q pressed-in parallel in advance is pinched and the frames 10q, clamp fixing member 20q, etc. are supported stably on the reaction force pile 50q.

The effect of the present embodiment is described.
First, the reaction force stand 1q is fixed to the reaction force pile 50q with the pinching unit 30q. Instead of the pinching unit 30q, other linking methods can be applied such as welding or using bolts. Next, in the clamp fixing unit 20q, the attachment 22q corresponding to the diameter of the clamp of the pile press-in/pull-out apparatus is positioned and fixed with the fixing pin 24q from both sides. With this, the attachment 22q can be attached to and removed from the clamp fixing unit 20q easily and securely.
In this case, when the clamp fixing unit 20q corresponds to the diameter of the clamp of the pile press-in/pull-out apparatus, the attachment 22q does not need to be provided.

Then, when the pile press-in/pull-out apparatus is provided on the reaction force stand 1q, a chuck (not shown) at the tip pinches a pressed-in pile 60q, and the chuck is lowered to press-in the first pressed-in pile 60q. Here, the reaction force stand 1q obtains sufficient reaction force by pinching the reaction force pile 50q with the pinching unit 30q. Therefore, reliable press-in operation can be performed.

After the first pile 60q is pressed-in, the linking plate 40q provided in the edge of the front frame 16q is linked with a pin to an attaching unit 61q of the press-in frame 60q. With this, second and following pressed-in piles are pressed-in using the reaction force from the existing pressed-in pile 60q. Therefore, further stable pile press-in work can be performed. The pull-out operation of the pile is performed by performing the above processes in the opposite order.

When the reaction force stand 1q is removed, if the pinching unit 30q is released from the reaction pile 50q and the linking pin of the linking plate 40q and the attaching unit 61q is removed, the reaction force stand 1q can be moved immediately, and swift operation is possible.
The above linking unit can be the pinching unit by a cylinder or can be merely be welding to the pressed-in pile.

(5)
An embodiment of the present invention is described with reference to FIG. 19 to FIG. 23. The referred reference numerals are described in FIG. 19 to FIG. 23.
As shown in FIG. 19 and FIG. 20, the block member attachment 4r according to the present embodiment includes a cylindrical main body unit 41r in which a block member 3r is able to penetrate vertically, and a holding unit 42r which holds the block member 3r penetrating in the cylindrical main body unit 41r. The cylindrical main body unit 41r is formed in a cylinder shape which has a substantially same diameter and a substantially same outer circumference shape as the steel tubular pile 2r in order to be able to be held at the chuck apparatus 15r.

The holding unit 42r is formed at the lower edge of the cylindrical main body unit 41r, and at least a portion is exposed downward than the lower edge of the cylindrical main body unit 41r.
The holding unit 42r includes a fixing unit 43r in a substantial half circle shape fixed to the cylindrical main body unit 41r and a movable unit 44r in a half circle shape similar to the fixed unit 43r. Such fixing unit 43r and movable unit 44r are combined to form a hole in which the block member 3r can penetrate vertically inside. With this, the holding unit 42r has a substantial cylinder shape in which the steel tubular pile 2r can be inserted.

The upper edge of the fixing unit 43r is strongly fixed to the cylindrical shaped main body unit 41r. Each of the left and right edges of the fixed unit 43r and the movable unit 44r facing each other closest are connected by the

hydraulic cylinder apparatuses

45r, 45r. The holding unit 42 extends and shortens freely (freely movable in a near/far (close/separate) direction) corresponding to extending and shortening of the two

hydraulic cylinder apparatuses

45r, 45r on the left and the right.
First and

second pinching units

46r, 47r which pinch the block member 3r from opposite directions are provided projecting from the center where the fixing unit 43r and the movable unit 44r face each other the farthest.

The press-in method of the block member 3r using the block member attachment 4r as described above is described. As shown in FIG. 19, the steel tubular piles 2r and so on are continuously pressed-in in a line. In this case, the pile press-in apparatus 1r is moved in the amount of one steel tubular pile 2r, and the steel tubular pile 2r is pressed-in.

Next, the crane pulls up the block member attachment 4r to insert the block member attachment 4r in the chuck apparatus 15r of the pile press-in apparatus 1r on the steel tubular pile 2r. The cylindrical main body unit 41r is held by the chuck apparatus 15r.
Next, as shown in FIG. 19C and FIG. 21, the diameter of the holding unit 42r of the block member attachment 4r held by the chuck apparatus 15r is made smaller. After inserting in the steel tubular pile 2r pressed-in last, the diameter is made larger, and the steel tubular pile 2r is held by the holding unit 42r. In this state, the block member attachment 4r holding the steel tubular pile 2r is held by the chuck apparatus 15r. With this, the pile press-in apparatus 1r can be supported by the steel tubular pile 2r through the block member attachment 4r.

Next, the hold of the steel tubular pile 2r, etc. by the clamp 11r, etc. is released, and the chuck apparatus 15r fixed to the steel tubular pile 2r through the block member attachment 4r is lowered with respect to the leader mast 14r. With this, the clamp 11r and the saddle 12r are raised.
With this, the clamp 11r, etc. is raised upward from the steel tubular pile 2r. Next, the saddle 12r is moved to the rear in an amount of one steel tubular pile 2r (including the interval between the steel tubular piles 2r) with respect to the slide base 13r. Next, the saddle 12r and the clamp 11r are lowered so that each clamp 11r, etc. is inserted in the steel tubular pile 2r, etc. which is one steel tubular pile 2r to the rear than before, and the clamp 11r, etc. holds the steel tubular pile 2r, etc.

With this, the pile press-in apparatus 1r is moved in the amount one steel tubular pile 2r to the rear on the steel tubular piles 2r, etc. Next, the diameter of the holding unit 42r is made smaller to raise the chuck apparatus 15r. With this, the hold of the steel tubular pile 2r by the holding unit 42r is released, and the holding unit 42r is free from the steel tubular pile 2r from above. Next, by the front and back movement of the slide base 13r and the turn of the leader mast 14r, the chuck apparatus 15r moves to the position to one side between left and right of the adjacent

steel tubular piles

2r, 2r, here a position shifted to each one side than the line connecting the centers of the adjacent

steel tubular piles

2r, 2r (side on which ground pressure is applied when the pressed-in steel tubular pile is used as the ground retaining wall). The block member 3r is pulled up by the crane and inserted in the block member attachment 4r. Here, the diameter of the holding unit 42r is made larger, and the block member 3r is inserted between the first pinching unit 46r and the second pinching unit 47r. Next, the diameter of the holding unit 42r is made smaller and the block member 3r is held by the block member attachment 4r.

The press-in of the block member 3r is performed similar to the press-in of the steel tubular pile 2r with the exception of being held by the chuck apparatus 15r through the block member attachment 4r and not rotating the pile holding unit 19r during press-in. When the block member has a round cross-section and can be rotated during press-in, rotating press-in or non-rotating press-in can be applied. When the press-in of the block member 3r ends for one stroke, the hold of the block member attachment 4r by the chuck apparatus 15r is not released, the hold of the block member 3r by the block member attachment 4r is released, and the chuck apparatus 15r is raised. Next, the chuck apparatus 15r is lowered with the block member attachment 4r holding the block member 3r, and the block member 3r is pressed-in to the predetermined position.

Then, again, as shown in FIG. 22, the chuck apparatus 15r is moved in the horizontal direction, the block member attachment 4r is moved on the steel tubular pile 2r (one steel tubular pile 2r rear than the steel tubular pile 2r before) and holds the steel tubular pile 2r as described above. Next, the pile press-in apparatus 1r moving to the rear steel tubular pile 2r, etc. and the pressing-in of the block member 3r are repeated so that the block member 3r is pressed into all of the steel tubular piles 2r, etc. provided aligned.
The block member 3r is not limited to L-shaped steel as shown in FIG. 20A, and can be a block member 3ar including H-shaped steel, a block member 3br including C-shaped steel, and block member 3cr including pipe-shaped steel (thin steel tube), as shown in FIG. 23A.
The press-in of the block member 3cr can be performed by the rotating press-in similar to the press-in of the steel tubular pile 2. In this case, the block member attachment 4r and the block member 3cr held by the block member attachment 4r are rotated by the chuck apparatus 15r to press-in the block member 3cr while rotating.

According to the press-in method of the block member attachment 4r and the block member, the press-in of the steel tubular pile 2r and the press-in of the block member 3r can be performed with one pile press-in apparatus 1r, and the costs can be decreased. By using the block member attachment 4r, the pile press-in apparatus 1r can move by itself on the line of steel tubular piles 2r, etc. which are already pressed-in. The pile press-in apparatus 1r can move on the line of pressed-in steel tubular piles 2r, etc. to press-in the block member 3r each time the pile press-in apparatus 1r moves.
According to the pile press-in apparatus 1r as shown in FIG. 48,

block members

3r, 3r which are steel tubes with small diameters can be pressed into both sides of continuous portions of the

steel tubular piles

2r, 2r. The

steel tubular piles

2r, 2r are rotated and pressed-in with a suitable interval in between. Two

block members

3r, 3r which are steel tubes with small diameters are pressed-in between the adjacent

steel tubular piles

2r, 2r to a predetermined depth distributed to both left and right in the position closest to the

steel tubular piles

2r, 2r. After the sediment is removed from a pile space region 1901r surrounded by two

block members

3r, 3r and

steel tubular piles

2r, 2r on both sides, solidifying material such as mortar can be filled to enable a structure which stops water. The solidifying material in the pile space region 1901r may be filled in a bag. With this, the material flowing before solidifying can be prevented.

(6)
An embodiment of the present invention is described with reference to FIG. 24 to FIG. 34. The referred reference numerals are described in FIG. 24 to FIG. 34.

As shown in FIG. 25, the main chuck frame 3As is formed with a first through hole (not shown) in which the pressed-in pile 2As can be passed through in a vertical direction Ys, and includes a main chuck 3s inside. The main chuck frame 3As includes a raising/lowering cylinder 32s (see FIG. 26) fixed to the cylinder tip of a pair of mast arm units 44s of the mast 4s and a guide 31s which fits to be able to slide in a vertical direction Ys along a vertical rail unit 40 by extending and shortening the raising/lowering cylinder 32s.

The pair of raising/lowering cylinders 32s is positioned so that the extending/shortening direction of the rod is in the vertical direction Ys as shown in FIG. 24, and the rod tip is fixed to the projecting edge of the mast arm unit 44s. Therefore, when the rod of the raising/lowering cylinder 32s is shortened from the extending state, the main chuck frame 3As (main chuck 3s) moves down through the raising/lowering cylinder 32s. When the rod of the raising/lowering cylinder 32s is extended from the shortened state, the main chuck frame 3As (main chuck 3s) moves up through the raising/lowering cylinder 32s. A stroke sensor (not shown) to detect a stroke of the pressed-in pile 2As is provided inside the main chuck frame 3As.

As shown in FIG. 25, the main chuck 3s is fixed in the main chuck frame 3As and is a portion which holds the pressed-in pile 2As. The main chuck 3s pinches the press-in pile 2As by pressure from the outer circumferential side with a fixed holding unit 34s and a movable holding unit 35s. The raising/lowering cylinder 32s maintains pinching of the pressed-in pile 2As and the main chuck frame 3As is lowered along the vertical rail unit 40s. With this, the pressed-in pile 2As is pressed-in.

As shown in FIG. 24, the sub-chuck frame 6As is positioned higher than a contact portion 50a of the clamp 50s, the sub-chuck frame 6As is formed with a second through hole (not shown) in which the pressed-in pile 2As can be passed through in the vertical direction Ys. The sub-chuck frame 6As is fixed at a bottom edge 61as of a guide 61s extending downward from a tip of a pair of mast arm units 44s provided in the mast 4s, and the sub-chuck frame 6As projects to the front from the bottom edge 61as. The sub-chuck frame 6As is positioned in a position on a same axis as a chuck axis Os with respect to the main chuck frame 3As in a position with an interval downward from the main chuck frame 3As. The sub-chuck 6s is placed on the inner side of the sub-chuck frame 6As.

As shown in FIG. 27, the sub-chuck 6s is fixed in the sub-chuck frame 6As along the internal circumference of the second through hole, and is a portion which pinches and holds the pressed-in pile 2As from the outer circumference side in a position below the main chuck 3s. As shown in FIG. 28 and FIG. 29, the sub-chuck 6s includes an arc shaped ring band 62s divided into a plurality of pieces (here, three pieces, 62As, 62Bs, 62Cs) in the circumferential direction, and a chuck cylinder 63s to link the edges 62as, 62as of the

ring bands

62s, 62s adjacent to each other in the circumferential direction to move the ring bands 62s in the radial direction. The three ring bands 62As, 62Bs, 62Cs are provided to be formed annular along the circumferential direction and are able to pass the pressed-in pile 2As through the internal circumference. An internal circumference portion 62bs of the ring band 62s presses the outer circumferential surface of the pressed-in pile 2As from the outer side in the radial direction to pinch the pressed-in pile 2As.

The chuck cylinder 63s is provided between

adjacent ring bands

62s, 62s in a state with the extending/shortening direction of the rod in a tangential direction of the ring band. One edge of the cylinder is supported by one ring band 62s, and the other end of the cylinder is supported by the other ring band 62s. The three chuck cylinders 63s extend or shorten at the same time to open and close the interval between the

ring bands

62s, 62s.
When the chuck cylinder 63s shrinks, the ring bands 62As, 62Bs, and 62Cs close and hold the pressed-in pile 2As. When the chuck cylinder 63s expands, the ring bands 62As, 62Bs, and 62Cs open and the pressed-in pile 2As is freed.

It is preferable that the main chuck 3s and the sub-chuck 6s is controlled so that at least one of the main chuck 3s or the sub-chuck 6s always holds the pressed-in pile 2As when the press-in operation of the pressed-in pile 2As is performed.

Next, the method of construction of the sheet pile wall by press-in of the pressed-in pile 2As in the ground by the press-in apparatus 1s is described with reference to the drawings. In FIG. 30 to FIG. 33, the reference numeral Ops shows release of the hold by the main chuck 3 and the sub-chuck 6s, and the reference numeral CLs shows the pinching of the hold.

As shown in FIG. 30A, according to the press-in apparatus 1s of the present embodiment, while holding the existing pile 2Bs with the clamp 50s, after finishing the press-in of one pressed-in pile 2As (2Cs shown in FIG. 30A), the pressed-in pile 2As is newly pressed-in at the front of the existing pile shown as 2Cs. First, the mast 4s is moved forward with respect to the saddle 5s fixed to the existing pile 2Bs with the clamp 50s, and the chuck axis Os of the main chuck 3s is set to match with the center axis of the press-in axis 2As to be pressed-in next.
Then, the pressed-in pile 2As is passed through the first through hole of the main catch frame 3As, and the main chuck 3s in a raised position P1s holds the pressed-in pile 2As at a position of a predetermined height (CLs). With this, preparation for press-in is complete. Here, the sub-chuck 6s is free (Ops) with respect to the pressed-in pile 2As.

Next, as shown in FIG. 30B, the main chuck 3s (main chuck frame 3As) is lowered along the vertical rail unit 40s by shrinking the raising/lowering cylinder 32s and the pressed-in pile 2As is lowered.
Then, when the press-in is complete by the stroke amount of one stroke of the main chuck 3s and the position reaches the lowered position P2s, as shown in FIG. 31A, the pressed-in pile 2As is held by the sub-chuck 6s from the outer circumferential side. Then, as shown in FIG. 31B, the hold by the main chuck 3s is released, and only the sub-chuck 6s holds the pressed-in pile 2As.

Next, as shown in FIG. 32A, the raising/lowering cylinder 32s is extended and the main chuck frame 3As, together with the released main chuck 3s, is raised from the lowered position P2s to the raised position P1s along the vertical rail unit 40s. When the main chuck frame 3As reaches the raised position P1s, as shown in FIG. 32B, the main chuck 3s holds the pressed-in pile 2As.

Then, as shown in FIG. 33A, the hold of the sub-chuck 6s is released, and as shown in FIG. 33B, similar to FIG. 30B, the main chuck 3s (main chuck frame 3As) is lowered along the vertical rail unit 40s by contracting the raising/lowering cylinder 32 to lower the pressed-in pile 2As.
When the pressed-in pile 2As is lowered to the ground, when the pressed-in pile 2As is pressed-in to a depth in which sufficient supporting force can be obtained, with the state always releasing the hold of the sub-chuck 6s, the pressed-in pile is held with the main chuck 3s, and the main chuck 3s (main chuck frame 3A) is lowered along the vertical rail unit 40s by contracting the raising/lowering cylinder 32s to press-in the pressed-in pile 2As in the ground.
Next, when the press-in is complete by the stroke amount of one stroke of the main chuck 3s and the position reaches the lowered position P2s, the hold by the main chuck 3s is released, the raising/lowering cylinder 32s is extended, and the main chuck frame 3As, together with the released main chuck 3s, is raised to the raised position P1s from the lowered position P2s along the vertical rail unit 40s.
Next, when the main chuck frame 3As reaches the raised position P1s, the main chuck 3s holds the pressed-in pile 2As.
The above motion is repeated, and the pressed-in pile 2As is sequentially pressed-in, and finally the pressed-in pile 2As is pressed-in to the predetermined depth.

As shown in FIG. 34A, in the last press-in of the pressed-in pile 2As (lowering strike), the position of the top end of the pressed-in pile 2As becomes lower than the sub-chuck 6s, and the upper edge portion of the pressed-in pile 2As cannot be held by the main chuck 3s and the sub-chuck 6s. Therefore, a lowering strike apparatus 8s which can be detachably connected to the upper edge 2as of the pressed-in pile 2As is used. The lowering strike apparatus 8s includes a steel tubular member. An upper cylinder unit 81s with substantially a same diameter as the pressed-in pile 2As and a lower cylinder unit 82s fitted on the inner side of an upper edge 2as of the pressed-in pile 2As which is pressed-in are connected vertically.

When the lowering strike of the pressed-in pile 2As is performed, as shown in FIG. 34A, the lower cylinder unit 82s of the lowering strike apparatus 8s hung by the crane is fitted on the inner side of the upper edge 2as of the pressed-in pile 2As, and the upper cylinder unit 81s is placed in the upper edge 2as of the pressed-in pile 2As. Next, as shown in FIG. 34B, the upper cylinder unit 81s is held with the main chuck 3s at the raised position P1s. With the sub-chuck 6s released with respect to the upper cylinder unit 81s, after the main chuck frame 3As (main chuck 3s) is lowered, and the position of the upper edge 2as is lowered up to a predetermined height, the lowering strike apparatus 8s is pulled up with the crane and detached. With this, the main chuck 3s and the sub-chuck 6s are not held. Next, as shown in FIG. 30A, the mast 4s is moved forward from the saddle 5s held by the existing pile 2Bs. The chuck axis Os of the main chuck 3s and the sub-chuck 6s is set to the position matching with the center of the pressed-in pile 2As to be pressed-in next, and the press-in can be performed by the above-described process.

According to the present embodiment, as shown in FIG. 30 to FIG. 33, the main chuck 3s holds the pressed-in pile 2As with the clamp 50s provided in the saddle 5s held by the existing pile 2Bs. By lowering the main chuck 3s along the vertical rail unit 40s, the pressed-in pile 2As can be pressed-in. Here, after the main chuck 3s lowers the pressed-in pile 2As with a predetermined press-in stroke, the pressed-in pile 2As is held by the sub-chuck 6s provided separately from the main chuck 3s, the hold by the main chuck 3s is released, and the main chuck 3s is raised and holds the pressed-in pile 2As at a position before lowering. Then, when the hold by the sub-chuck 6s is released, the main chuck 3s is lowered along the vertical rail unit 40s. By repeating the above process, the pressed-in pile 2As can be lowered. After the pressed-in pile 2As is lowered to the ground, and the pressed-in pile 2As is pressed-in to a state in which sufficient supporting force can be obtained, the pressed-in pile 2As can be continuously pressed-in by the above-described press-in process.

By repeating the above process, the press-in of one pressed-in pile 2As is performed. Then, after the press-in of the first pressed-in pile 2As with the predetermined length is finished, the mast 4s is moved forward with respect to the saddle 5s and the main chuck 3s is moved to the press-in position of the next second pressed-in pile 2As. The second pressed-in pile 2As is pressed-in by the above process.
According to the present embodiment, the plurality of adjacent pressed-in piles 2As pressed-in can be continuously processed without changing the position of the clamp 50s of the saddle 5s.

When the second pressed-in pile is pressed-in to the state in which the supporting force to raise the weight of the press-in apparatus is obtained, the clamp 50s is released from the existing pile and the upper portion of the pressed-in pile 2As is held with the main chuck 3s in the raised position P1s with respect to the vertical rail unit 40s. Then, after the mast 4s is raised with the saddle 5s and the saddle 5s is moved forward with respect to the mast 4, the mast 4s is lowered with the saddle 5s and the clamp 50s is held by the existing pile 2Bs. With this, the press-in apparatus 1s can be continuously moved forward to perform press-in.

According to the present embodiment, press-in can be performed in a stable state with the shaking to the sides suppressed in work with a high top edge in which the upper edge of the pressed-in pile 2As is positioned high from the ground, or in work where there is a height limit and sufficient crane properties such as the crane height and rated capacity cannot be achieved.

As described above, according to the press-in apparatus and the sub-chuck frame with the sub-chuck of the present embodiment, even if there are restricted conditions in using the crane, the pressed-in pile 2As can be pressed-in in a stable state accurately and continuously.

(7)
An embodiment of the present invention is described with reference to FIG. 35 and FIG. 36.
As shown in FIG. 35 and FIG. 36, a sediment retaining wall 810 is established by pressing-in a plurality of hat steel sheet piles 804 continuously in the ground and forming a wall in a substantial wave shape repeating a mountain and a valley in the steel sheet pile 804. In the valley portion of the steel sheet pile 804 of part of the wall by the steel sheet pile 804, a steel tubular pile 805 which is a stiffening member is positioned along a longitudinal direction of the steel sheet pile 804 to form a combined steel sheet pile.
The pile press-in apparatus 801 which establishes the sediment retaining wall 810 includes a plurality of clamps 802 to hold the upper edge of the steel sheet pile 804 and the chuck apparatus 803 can be raised and lowered from the clamp 802.
The pile press-in apparatus 801 obtains reaction force by holding the upper edge of the steel sheet pile 804 with the clamp 802, and the steel tubular pile 805 held by the chuck apparatus 803 is rotated and pressed-in the ground adjacent to the steel sheet pile 804.

(8)
An embodiment of the present invention is described with reference to FIG. 37 to FIG. 44. The referred reference numerals are described in FIG. 37 to FIG. 44.
As shown in FIG. 37, a self-propelled adapter 1t includes a cylinder-shaped front latching unit 2t and a rear latching unit 3t formed as one, a plate-shaped front linking unit 4t on a side face of the front latching unit 2t, and a plate-shaped rear linking unit 5t on a side face of the rear latching unit 3t, and a holding body 6 formed as one at a bottom of the rear latching unit 3t.

FIG. 38 to FIG. 44 show a summary of the pile work process performed using the self-propelled adapter 1t. Pt shows the steel tubular pile, 10t shows the pile press-in apparatus.

The self-propelled adapter 1t is connected to the steel tubular pile Pt by the holding unit 6t in the lower portion being fitted in the upper edge of the steel tubular pile Pt already pressed-in, and pressing with contact to the inner surface of the steel tubular pile Pt.

As shown in FIG. 37, a plurality of penetrating holes 4at, 5at are formed in the vertical direction in the front linking unit 4t and the rear linking unit 5t in the upper portion. The front linking unit 4t pinches the rear linking unit 5 of the adjacent self-propelled adapter 1t and a pin (not shown) is inserted in at least one pair of the penetrating holes 4at, 5at. With this, a strong link is possible.

According to the present embodiment, the self-propelled adapter 1t placed at the top of the steel tubular pile Pt is linked using the front linking unit 4t and the rear linking unit 5t. This can achieve stability as the base of the reaction force for the pile press-in apparatus 10t.
The front linking unit 2t and the rear linking unit 3t have a diameter which can be held by the clamp 11t of the pile press-in apparatus 10t, and have the same pitch as the clamp 11t of the pile press-in apparatus 10t.
The interval of the clamp 11t of the pile press-in apparatus 10t is adjusted in advance according to the interval of the steel tubular pile Pt.

Next, the pile work process is described.

(Step 1)
As shown in FIG. 38, two adjacent self-propelled adapters 1t are connected by a holding body 6t fitted in the upper edge portion of the steel tubular pile Pt already pressed into the ground with an interval are linked by the front linking unit 4t and rear linking unit 5t. The front latching unit 2t and the rear latching unit 3t of the rear self-propelled adapter 1t and the rear latching unit 3t of the front self-propelled adapter 1t are each connected with a clamp 11t, and the pile press-in apparatus 10t is placed on the two connected self-propelled adapters 1t.
Next, a new steel tubular pile Pt is passed through the chuck 15t of the pile press-in apparatus 10t and the tubular pile Pt is pressed into the ground to a predetermined depth.

(Step 2)
As shown in FIG. 39, the cylinder shaped lowering strike apparatus 20t is built in the steel tubular pile Pt, and the steel tubular pile Pt is pressed-in to a predetermined position (planned height) by the pile press-in apparatus 10t.

(Step 3)
The lowering strike apparatus 20t is removed, and as shown in FIG. 40, a new self-propelled adapter 1t is built in the steel tubular pile Pt with the holding body 6t.

(Step 4)
As shown in FIG. 41, the lowering strike apparatus 20t is built in the rear latching unit 3t of the new self-propelled adapter 1t built in the steel tubular pile Pt. The lowering strike apparatus 20t is held by the chuck 15t and the clamp 11t of the pile press-in apparatus 10t is released. The cylinder unit 16t is driven and the pile press-in apparatus 10t rises.

(Step 5)
As shown in FIG. 42, the saddle 12 moves forward with respect to the slide base 13t, and the pile press-in apparatus 10t is moved forward one pitch of the clamp 11t.
Next, the pile press-in apparatus 10t is lowered, the clamp 11t is connected to the front latching unit 2t of the rear self-propelled adapter 1t and the front latching unit 2t and the rear latching unit 3t of the middle self-propelled adapter 1t. The lowering strike apparatus 20t is removed from the rear latching unit 3t of the front self-propelled adapter 1t.

(Step 6)
As shown in FIG. 43, the lowering strike apparatus 20t is built in the front latching unit 2t of the front self-propelled adapter 1t. The lowering strike apparatus 20t is held by the chuck 15t, and the clamp 11t of the pile press-in apparatus 10t is released. The cylinder unit 16t is driven to raise the pile press-in apparatus 10t to move the saddle 12t forward with respect to the slide base 13t. The pile press-in apparatus 10t is moved one pitch of the clamp 11t.

(Step 7)
As shown in FIG. 44, the pile press-in apparatus 10t is lowered and the lowering strike apparatus 20t is removed.
The pile press-in apparatus 10t is repeatedly moved forward one pitch of the clamp 11 and moves a distance of the pile interval.
Next, the new steel tubular pile P is passed through and built in the chuck 15t, and the process returns to the above step 1.

As described above, the self-propelled adapter 1t which does not influence the pile press-in apparatus 10t is removed and is used again.

The self-propelled adapter 1t of the present embodiment includes a front latching unit 2t and a rear latching unit 3t which are connected to three connected clamps 11t of the pile press-in apparatus 10t, linking

units

4t, 5t which are provided adjacent to the side surface of the latching

units

2t and 3t and connect the adapters, and a holding body 6t which is provided at the bottom of the rear latching unit 3t and which is connected to the pile top. As described above, when the steel tubular pile P is pressed-in with an interval (skipped pile), the pile press-in apparatus 10t can easily move by itself without press-in of dummy short piles.

Therefore, when preventing piles, base piles, strengthening piles of a continuous wall or the like are continuously buried with an interval at least a pile diameter or more, the work term can be shortened and the costs can be decreased.

(9)
An embodiment of the present invention is described with reference to FIG. 45 and FIG. 46. The referred reference numerals are described in FIG. 45 to FIG. 46.

The method to establish the sediment retaining wall according to the present embodiment is described. For example, as shown in FIG. 45, the method to establish the sediment retaining wall according to the present embodiment is used to sequentially press-in a plurality of sheet piles 2u (pile) in a state latched at the latching unit 20u, and to press-in the raking pile 3u on one surface of the sheet pile wall 2au formed by the plurality of sheet piles 2u, etc. positioned in a line. The raking pile 3u is pressed-in at a predetermined interval from a position adjacent to the upper portion of the sheet pile 2u. The raking pile 3u is pressed-in tilted from the longitudinal direction of the sheet pile 2u.

When the sheet pile 2u is pressed in, the tilted mast unit 5u is vertical, and the sheet pile 2u is held by a holding unit 81u. The chuck unit 8u holding the sheet pile 2u is lowered with the hydraulic cylinder 82u of the chuck unit 8u, and the sheet pile 2 is pressed into the ground.

When the raking pile 3u is pressed-in, the existing sheet piles 2u, etc. is held by the clamp 71u, etc. The hydraulic cylinders 10u, 10u operate in the opposite direction with the chuck unit 8u raised, and a turning stage 6u connected to the hydraulic cylinders 10u, 10u turn. With this, the tilted mast unit 5u linked to the turning stage 6u is tilted. Then, the hydraulic cylinder 82u including the chuck unit 8u is lowered diagonally in the ground direction. The chuck unit 8u holding the raking pile 3u with the holding unit 81u is lowered, and the raking pile 3u is pressed-in the ground with the sheet pile 2u tilted.

Then, with the raking pile 3u pressed-in, after the existing sheet pile 2u and the raking pile 3u are connected with a combining member 32u, concrete Du is flown and hardened, and the raking pile 3u and the sheet pile 2u are joined.

When the holding unit 81u is rotated and driven with respect to the chuck unit 8u main body, the held raking pile 3u can be pressed-in while rotating. According to such configuration, for example, as shown in FIG. 46, the rotating press-in steel tubular pile 31u (rotating pressed-in pile) including a spiral screw 3a at the tip can be used. When such rotating press-in steel tubular pile 31u is pressed-in while rotating according to a direction of the screw 3au, the rotating press-in steel tubular pile 31u can be pressed-in smoothly. Sediment pressure is provided on the sheet pile wall 2au in the horizontal direction (arrow Fu direction in FIG. 46) and force as if to pull out the raking pile 3u is applied. In response to such force, as for a normal raking pile 3u, there is only resistance by friction between the raking pile 3u and the sediment. By using the rotating press-in steel tubular pile 31u including the screw 3au, the load of the sediment on the screw 3au is applied. When there is force to press up the sediment with the screw 3au, high pulling resistance can be obtained by the stress on the shearing force caused between the sediment applied with the force to press up the sediment with the screw 3au and the surrounding sediment in the supporting layer Pu, and it is possible to handle back sediment pressure.

According to the method to establish the sediment retaining wall according to the present embodiment, movement on the sheet pile 2u pressed-in in advance (existing sheet pile) is possible to sequentially press-in the new sheet pile 2u in the position adjacent to the existing sheet pile 2u. Moreover, the raking pile 3u can be pressed-in in at least one portion of the front portion and the rear portion of the sheet pile wall 2au formed by the sheet pile 2u, etc. Therefore, the mechanism can be used for press-in of piles in the vertical direction and in the tilted direction. With this, the sheet pile wall 2au is established, and the raking pile 3u is pressed-in diagonally. Therefore, the sediment retaining wall 50u can be efficiently established which can suppress the displacement of the sheet pile wall 2au and the operation to establish the sediment retaining wall 50u which stands stably even when the height is high can be easily performed. In a narrow place where there is no place to provide a temporary scaffolding, a sediment retaining wall 50u with a ground anchor (raking pile 3u) can be made. Therefore, the term of the time period necessary for work can be shortened and the cost of the work can be suppressed.

(10)
Conventionally, when the water cut-off wall is made by continuous steel tubular sheet piles, the following method is performed. For example, as shown in FIG. 47A, a male joint 1002 and a female joint 1003 are provided in different positions in the circumferential direction on the outer circumferential portion of the steel tubular sheet pile (steel tubular main body) 1001. One steel tubular sheet pile 1001 is moved in the longitudinal direction relatively with respect to the other steel tubular sheet pile 1001. The male and

female joints

1002, 1003 of the steel tubular sheet piles are fitted to form the steel tubular sheet pile.
The pile press-in apparatus including the function to hold the steel tubular pile and press-in the steel tubular pile while rotating can move the steel tubular pile in an axis direction without rotating. Therefore, the joint of the steel tubular sheet pile 1001 as shown in FIG. 47A can be fitted.
The male and female joints are not limited to those shown in FIG. 47A, and can be a structure as shown in FIG. 47B, FIG. 47C, or any other structure.

(11)
As the mechanism to hold the pile provided in the chuck apparatus, it is possible to employ a mechanism including an outer wedge, an inner wedge in which its inclined plane is able to slide in contact with the inclined plane of the outer wedge, and an actuator (hydraulic cylinder, etc.) which relatively moves down both of the above wedges.
The position from the central axis of the pile of the outer wedge is fixed. The outer wedge and the inner wedge move relatively up and down so that the inner wedge moves forward and backward in relation to the pile, and the pile can be held and released.

(12) Others
According to the above-described embodiment, the member in contact with the pile is provided in the chuck apparatus of the pile press-in apparatus can be exchanged. For example, by exchanging with members with different thicknesses, there is an advantage that piles with different diameters can be held.
The member in contact with the pile provided in the clamp which holds the existing pile of the pile press-in apparatus can be exchanged. For example, by exchanging with members with different thicknesses, there is an advantage that piles with different diameters can be held.

According to the above-described embodiment, the auger apparatus which drills the ground to support the press-in can also be used. When the auger apparatus is also used in the press-in of the steel tubular pile, the auger driving unit is positioned in the upper edge of the steel tubular pile, and the auger screw rotated by the auger driving unit is passed through the steel tubular pile to be pressed-in. The auger head including the drilling bit at the tip can be positioned in front of the auger screw and this can be used for drilling the ground.
According to the embodiment as described in (7), when the steel sheet pile and the steel tubular pile are made, the chuck apparatus holding the steel sheet pile and the chuck apparatus holding the steel tubular pile are exchanged with each other so that the steel sheet pile and the steel tubular pile can be pressed-in. In this case also, the auger apparatus can be used when the work is performed for the steel tubular pile, and the rotating press-in of the steel tubular pile and the drilling of the ground by the auger apparatus can both be performed to efficiently perform the work.
The auger apparatus can also be used when the sheet pile is made. In this case, when the auger screw is passed through, a casing which supports the auger driving unit at the upper edge is applied. A guide rail along the longitudinal direction is provided on the outer surface of the casing. As the chuck apparatus, those including the holding apparatus which holds the guide rail is applied. By positioning so that a portion of the casing is included in the concaved portion of the steel sheet pile, and by pressing the convex surface side of the steel sheet pile with the hydraulic cylinder apparatus provided in the chuck apparatus, the hydraulic cylinder apparatus and the casing pinches the steel sheet pile and holds the steel sheet pile. When the hold of the steel sheet pile by the hydraulic cylinder apparatus is released, by holding only the guide rail of the casing with the chuck apparatus and raising and lowering the chuck apparatus, the auger apparatus can be moved vertically according to the casing with respect to the steel sheet pile. Here, when the steel sheet pile is supported by the ground or is supported by the crane, the steel sheet pile does not move vertically. When the crane is used, the steel sheet pile can be moved vertically independent from the casing.

According to the embodiment as described in (3), by using the drilling steel tubular pile including the bit at the tip as the steel tubular pile rotated and pressed-in, the press-in of the steel tubular pile can be performed regardless of conditions of obstacles in the ground.
The steel press-in apparatus according to the present embodiment holds the existing piles to stand by itself and performs press-in operation of the new piles. The pile press-in apparatus can move by itself on the pile line of the continuous plurality of existing piles. Therefore, temporary piers for scaffolding do not need to be established for the piles, and the pile press-in apparatus can stand on its own on the upper edge of the existing piles as the scaffolding. With this, work on narrow land is possible.
According to the above embodiment, when the steel tubular pile is rotated and pressed-in the ground, a cylindrical wall of the steel tubular pile is pressed into the ground, and there is no need to drill or eject the ground where the steel tubular pile is positioned. Therefore, the steel tubular pile can be pressed-in efficiently and the amount of waste sediment can be suppressed to a small amount.
According to the present embodiment, the steel tubular pile is pressed into the ground while rotating, and therefore, it is possible to naturally avoid the steel tubular pile from being pressed into the ground in a bent shape. That is, it is possible to prevent the pile structure from losing the center.

According to the present embodiment, the mast on the slide base is able to turn. According to the configuration described below, the mast is able to tilt to the front and back, and the tilt angle of the front and back in the press-in direction of the pile can be corrected.
That is, the configuration includes a turn frame provided rotatable with respect to the slide base on the slide base, a mast rotatable with the turn frame on the turn frame and provided to be able to tilt in the front and back with respect to the turn frame, and a hydraulic cylinder in which one end is fixed to the turn frame and the other end is fixed to the mast. The mast includes a rotating point at the bottom of the front side which is the chuck apparatus side. The mast is driven to tilt front and back by the hydraulic cylinder with the rotating point as the fulcrum.

Regardless of the above-described embodiment, according to the following configuration, oil pressure is supplied from outside to move the chuck unit included in the rotating unit, the holding force is maintained by closing the valve of the hydraulic path on the rotating unit side. Then, the hydraulic path is cut from outside and the rotating unit can be rotated.
That is, the chuck apparatus includes an apparatus main body, and a rotating unit which is provided rotatable with respect to the apparatus main body and which includes a chuck apparatus. The rotating unit includes a connecting unit of a hydraulic hose. When the rotating of the rotating unit stops, the oil pressure is supplied through the hydraulic hose connected to the connecting section. With this, the chuck unit is able to hold and release the pile and the rotating unit is able to rotate when the connecting unit is not connected to the hydraulic hose. The state after the operation can be maintained throughout connection and non-connection between the connecting unit and the hydraulic hose.

According to the embodiment of the present invention, the pile is pressed into the ground by obtaining reaction force from the existing pile. Therefore, the pile press-in apparatus is able to obtain a large reaction force which is a large press-in force without making the apparatus large. The pile held by the chuck unit is pressed into the ground while continuously rotating in at least one rotating direction. Therefore, the resistance when the pile is pressed-in is reduced and the press-in of the pile can be supported. Therefore, the pile can be pressed-in more efficiently. Moreover, even if the rotating steel tubular pile provided with blades and wedges on the outer circumference is used, the pile can be easily pressed into the ground.
The pile press-in apparatus according to the present embodiment is an apparatus which obtains reaction force from the existing pile. The apparatus can be made small and light, and it is possible to work on water, on slopes and on narrow land. For example, compared to the above three-point pile driver, the entire apparatus can be made small and light, and work which is difficult for the three-point pile driver can be performed on water, on slopes, and on narrow land.

The present invention can be applied to pile press-in apparatuses and pile press-in methods.

1 chuck apparatus
6 apparatus main body
7 rotating unit
9 chuck unit
51 vertical hydraulic cylinder (lift)
81 electric actuator (driving unit)
82 power rail
87 power collecting brush
100 pile press-in apparatus
P steel tubular pile (existing pile)

Claims

A pile press-in apparatus which performs press-in of a pile into a ground by obtaining reaction force from an existing pile or sheet pile, the pile press-in apparatus comprising:
a chuck apparatus; and
a raising/lowering unit which raises/lowers the chuck apparatus,
wherein the chuck apparatus includes,
a chuck unit which holds the pile, and
a rotating unit which rotates the chuck unit in at least one rotating direction continuously to be able to continuously rotate the pile held by the chuck unit in at least one rotating direction, and
wherein in a state in which the reaction force is obtained from the existing pile, while continuously rotating the chuck unit holding the pile in at least one rotating direction with the rotating unit, the chuck apparatus is raised/lowered with the raising/lowering unit to press-in the pile into the ground while rotating the pile in at least one rotating direction continuously.
The press-in apparatus according to claim 1, wherein, the chuck apparatus further includes,
an apparatus main body and
a rotating unit which is provided rotatable with respect to the apparatus main body and which includes the chuck unit,
wherein in a linking portion between the apparatus main body and the rotating unit, in either one of the apparatus main body and the rotating unit, a conductive power rail is provided along a circumferential direction with a rotating center of the rotating unit as a center, and in the other of the apparatus main body and the rotating unit, a conductive power collecting brush which comes into contact with the power rail is provided, and
wherein power can be supplied to a driving unit which drives the chuck unit of the rotating unit from the apparatus main body through the power rail and the power collecting brush.
The pile press-in apparatus according to claim 1, wherein, the chuck apparatus further includes,
an apparatus main body, and
a rotating unit which is provided rotatable with respect to the apparatus main body and which includes the chuck unit, and
wherein a battery is provided in the rotating unit to supply power to a driving unit which drives the chuck unit of the rotating unit through the battery.
The pile press-in apparatus according to claim 1, wherein, the chuck apparatus further includes,
an apparatus main body, and
a rotating unit which is provided rotatable with respect to the apparatus main body and which includes the chuck unit, and
wherein a connecting unit of the hydraulic hose is provided in the rotating unit,
wherein when the rotating of the rotating unit is stopped, the chuck unit is able to perform an operation to hold the pile and an operation to release the pile by oil pressure supplied through a hydraulic hose connected to the connecting unit,
wherein the rotating unit is able to rotate when the connecting unit is not connected with the hydraulic hose, and
wherein a state after the operation can be maintained when the connecting unit and the hydraulic hose are connected and when the connecting unit and the hydraulic hose are not connected.
The pile press-in apparatus according to any one of claims 1 to 4, further comprising a clamp which holds the existing pile or the sheet pile,
wherein a member which is provided in the chuck apparatus and the clamp and which comes into contact with the pile can be exchanged, and the pile with a different diameter can be held by exchanging the member.
The pile press-in apparatus according to any one of claims 1 to 4, further comprising a plurality of clamps which hold the existing pile or the sheet pile,
wherein an interval in front and rear between positions of the plurality of clamps can be changed.
The pile press-in apparatus according to claim 1, further comprising a tilt mast unit which is able to turn to change a raising/lowering direction of the chuck apparatus.
The pile press-in apparatus according to any one of claims 1 to 4, further comprising,
a clamp which holds the existing pile or the sheet pile;
a slide base provided to be able to move linearly on the clamp front and back with respect to the clamp;
a turn frame provided on the slide base to be rotatable with respect to the slide base;
a mast which is provided on the turn frame to be rotatable with the turn frame and to be able to move tilted front and back with respect to the turn frame; and
a hydraulic cylinder in which one edge is fixed to the turn frame and the other edge is fixed to the mast,
wherein the mast includes a rotating point at a lower portion of a front side which is the chuck apparatus side and the mast is driven by the hydraulic cylinder to move tilted front and back with the rotating point as a fulcrum.
The pile press-in apparatus according to any one of claims 1 to 4, further comprising a fluid ejecting apparatus which ejects a fluid through a pipe positioned along an inner wall of the pile held by the chuck apparatus to a position near a lower edge portion of the pile.
The pile press-in apparatus according to any one of claims 1 to 4, further comprising a tip drilling blade attached to a tip of the pile held by the chuck apparatus.
A reaction force stand which obtains reaction force for a pile press-in apparatus according to claim 1 comprising:
a linking unit in which a clamp fixing unit to fix a clamp of the pile press-in apparatus is attached to a frame, and a reaction force body positioned in advance is linked to the frame, the linking unit provided in a front end of the reaction force stand to be linked to a first pressed-in pile.
A block member attachment to press-in a block member to block between adjacent pressed-in piles using the chuck apparatus when a plurality of piles are pressed-in continuously using the pile press-in apparatus according to claim 1, the block member attachment comprising:
a cylindrical main body unit which can be held by the chuck apparatus and through which the block member penetrates vertically; and
a holding unit which holds the block member which penetrates through the cylindrical main body unit.
The pile press-in apparatus according to claim 1,
wherein the chuck apparatus includes a main chuck which detachably holds a pressed-in pile, and a main chuck frame to which the main chuck is attached,
wherein the pile press-in apparatus further includes a mast which supports the main chuck frame to be able to move vertically relatively,
wherein the pile press-in apparatus further includes a saddle which supports the mast to be able to move front and back relatively and which includes a clamp to detachably hold a reaction force pile, and
wherein the chuck apparatus includes a sub-chuck frame which extends forward from the mast in a position other than a moving range of the main chuck frame in a vertical direction and a sub-chuck which is able to detachably hold the pressed-in pile attached to the sub-chuck frame.
A self-propelled adapter of a pile press-in apparatus according to claim 1 wherein, the self-propelled adapter is placed on the top of the pile when the pile is pressed-in,
the self-propelled adapter further including,
a plurality of latching units which are connected to at least two clamps linked to the pile press-in apparatus and which are formed as one; and
one holding body which is provided as one at a lower portion of the plurality of latching units and which is connected to a top of the pile.
The pile press-in apparatus according to claim 1, further comprising, a clamp which holds an upper edge of the steel sheet pile to establish a sediment retaining wall established by a steel sheet pile and a combined steel sheet pile in which a stiffening member is placed along a longitudinal direction of the steel sheet pile,
wherein the chuck apparatus can be raised and lowered with respect to the clamp.
A pile press-in method using the pile press-in apparatus according to claim 1 to press-in a pile into a ground by obtaining reaction force from existing piles, the method comprising:
raising/lowering the chuck apparatus by the raising/lowering unit while continuously rotating the chuck unit holding the pile in at least one rotating direction with the rotating unit in a state obtaining reaction force from the existing pile; and
pressing-in in the ground the pile while continuously rotating in at least one rotating direction.
An establishment method of a sediment retaining wall using the pile press-in apparatus according to claim 7 in which the reaction force is obtained from the existing pile or sheet pile to press-in a new pile, in which the pile press-in apparatus moves on the existing pile or the sheet pile to sequentially press-in the new pile in a position adjacent to the existing pile or sheet pile, and in which a press-in angle of the new pile can be changed, wherein,
the press-in apparatus includes a tilted mast unit which can be turned to change a raising/lowering direction of the chuck apparatus,
the method comprising,
establishing a sheet pile wall as the sediment retaining wall with the pile press-in apparatus by pressing-in the new pile along the existing pile or sheet pile while obtaining reaction force from the existing pile or sheet pile;
pressing-in a raking pile, which prevents displacement of the sheet pile wall, tilted with respect to the sheet pile wall while obtaining the reaction force from the existing pile or sheet pile using the pile press-in apparatus; and
combining the raking pile with the sheet pile wall.
A pile press-in method comprising:
pressing-in a reaction force pile in a ground;
positioning a reaction force stand according to claim 11 on the reaction force pile with the reaction force pile pinched using a pinching unit of the reaction force stand;
after positioning the reaction force stand, fixing a clamp of the pile press-in apparatus on an inner side of a clamp fixing unit attached to the frame;
after fixing the clamp, pressing-in a first pile in front of the reaction force stand; and
after pressing-in, linking the press-in stand with the first pressed-in pile to press-in the pile.
A pile press-in method which uses the pile press-in apparatus according to claim 15, the method comprising:
rotating and pressing-in a steel tubular pile held by the chuck apparatus in a ground in a position adjacent to the steel sheet pile by obtaining reaction force by holding with the clamp an upper edge of the steel sheet pile already pressed-in the ground.
A pile press-in method to continuously lay a pile with an interval in between by repeating the following,
pressing-in a pile; and
removing a lowering strike apparatus,
wherein the pressing-in the pile includes,
positioning and connecting the self-propelled adapter according to claim 14 with the holding body to a plurality of pile tops laid in the ground continuously with an interval in between,
connecting the clamp to at least the rear latching unit of the self-propelled adapter,
positioning the pile press-in apparatus in the self-propelled adapter,
pressing-in the new pile passed through the chuck apparatus of the pile press-in apparatus in the ground,
then passing through the lowering strike apparatus in the chuck apparatus to connect to the top of the new pile, and
pressing-in the new pile to a predetermined position by the pile press-in apparatus through the lowering strike apparatus,
wherein the removing a lowering strike apparatus includes,
removing the lowering strike apparatus,
positioning and connecting the top of the new pile with the holding body to a new self-propelled adapter,
after passing the lowering strike apparatus through the chuck apparatus to connect the rear latching unit of the new self-propelled adapter, releasing the clamp to move the pile press-in apparatus in an amount of one pitch of the clamp,
after passing the lowering strike apparatus through the chuck apparatus again to connect the front latching unit of the self-propelled adapter, releasing the clamp to move the pile-press-in apparatus in an amount of one pitch of the clamp, and
removing the lowering strike apparatus from the front latching unit of the self-propelled adapter.
A pile press-in method comprising:
continuously pressing-in a plurality of steel tubular piles in a line with the pile press-in apparatus using the pile press-in apparatus according to claim 1 and the block member attachment according to claim 12; and
pressing-in the block member along adjacent steel tubular piles with the block member attachment held by the chuck apparatus and the block member held by the holding member of the block member attachment.
The pile press-in method according to claim 21, wherein the block member is pressed-in while rotating by the chuck apparatus which rotates the block member attachment and the block member held by the block member attachment.