WO2014103575A1 - Method for applying rotary press-in pile - Google Patents

Method for applying rotary press-in pile Download PDF

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Publication number
WO2014103575A1
WO2014103575A1 PCT/JP2013/081373 JP2013081373W WO2014103575A1 WO 2014103575 A1 WO2014103575 A1 WO 2014103575A1 JP 2013081373 W JP2013081373 W JP 2013081373W WO 2014103575 A1 WO2014103575 A1 WO 2014103575A1
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WO
WIPO (PCT)
Prior art keywords
pile
press
rotary press
reaction force
fitting
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Application number
PCT/JP2013/081373
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French (fr)
Japanese (ja)
Inventor
壮典 犬飼
啓悟 武川
智之 東海林
正道 澤石
浩二 堺
坂本　隆
大木　仁
Original Assignee
新日鉄住金エンジニアリング株式会社
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Application filed by 新日鉄住金エンジニアリング株式会社 filed Critical 新日鉄住金エンジニアリング株式会社
Publication of WO2014103575A1 publication Critical patent/WO2014103575A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20—Placing by pressure or pulling power

Definitions

  • the present invention relates to a method for constructing a rotary press-fit pile that press-fits a rotary press-fit pile having a spiral blade at its tip while rotating it on the ground.
  • Patent Document 1 The thing of the following patent document 1 is known as what press-fits while rotating the said rotation press-fit pile to the ground.
  • the apparatus described in Patent Document 1 is intended to apply a propulsive force to a rotary press-fit pile, a gripping mechanism that detachably holds the rotary press-fit pile, a rotary mechanism that rotates the gripping mechanism while holding the rotary press-fit pile, And an all-swivel machine having an elevating mechanism that supports the gripping mechanism so as to be movable up and down.
  • the gripping mechanism is rotated by the rotating mechanism while the rotary press-fitting pile is gripped by the gripping mechanism, and the gripping mechanism is lowered by the lifting mechanism. Then, while changing the gripping position of the rotary press-fitted pile by the gripping mechanism along the length direction of the rotary press-fitted pile (that is, changing the position), it is repeated by a predetermined length.
  • the rotary press-fit pile is rotationally press-fitted into the ground by rotating the rotary press-fit pile while pressing it downward with an all-swivel machine. For this reason, when rotationally press-fitting a rotary press-fit pile, a rotational reaction force in the direction opposite to the rotation of the rotary press-fit pile and an upward pressing reaction force are applied to the entire turning machine or a mount on which the entire turning machine is mounted. Therefore, it is necessary to support the all-swivel machine or the mount on which the all-swing machine is mounted so as to counter these reaction forces.
  • An object of the present invention is to provide a method for constructing a rotary press-fit pile that can press-fit the rotary press-fit pile without any trouble.
  • a method for constructing a rotary press-fit pile includes a step of rotating and press-fitting the rotary press-fit pile into the ground by rotating the rotary press-fit pile having a spiral blade at the tip while pressing downward. And a step of rotating and pressing a reaction force pile smaller than the rotary press-fitting pile into the ground, and the rotational reaction force generated when the rotary press-fitting pile is press-fitted into the ground and the upward pressing The reaction force is borne on the reaction force pile previously constructed.
  • a small reaction force pile having a spiral blade at the tip is rotationally press-fitted into the ground. Then, by utilizing the fixing force of the small reaction force pile on the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. That is, when the rotary press-fit pile is rotationally press-fitted into the ground, the reaction force pile can be caused to bear the rotational reaction force acting on the rotary press-fit pile and the upward pressing reaction force. Therefore, even if the construction site is submarine ground or lake bottom ground and the buoyancy due to water is received, it is difficult to use the rotary press-fit pile as a counter force to counteract the reaction force such as its own weight. It can be press-fitted into the ground.
  • the first press-fitting device for rotary press-fitting the rotary press-fitting pile into the ground and the second press-fitting device for rotary press-fitting the reaction force pile into the ground are attached to a common frame. It may be.
  • the rotational reaction force and the upward pressing reaction force act on the common frame.
  • the common platform is fixed to the ground by reaction piles.
  • the fixing force of the reaction force pile can be used as a counter force against the rotation reaction force and the upward pressing reaction force when the rotation press-fitting pile is rotationally press-fitted into the ground through the common mount. Therefore, the rotary press-fit pile can be press-fitted into the ground without hindrance.
  • a plurality of the second press-fitting devices may be attached around the first press-fitting device.
  • the rotational reaction force and the upper direction are utilized by utilizing the fixing force to the ground of the plurality of reaction force piles arranged around the first press-fit device. It can counter the pressure reaction force against In this way, the reaction force piles are arranged in a well-balanced manner around the first press-fitting device, so that a large reaction force can be avoided from being applied to a specific reaction force pile, and each reaction force pile can be opposed to a relatively small reaction force.
  • a structure that can be used is sufficient. For this reason, each reaction force pile can be reduced in size, and the penetration depth of the reaction force pile into the ground can be set relatively shallow.
  • the construction method of the rotary press-fitting pile of the present invention may further include a step of adjusting the inclination of the common mount by individually changing a relative height position of the reaction force pile with respect to the common mount. .
  • the inclination of the common mount can be adjusted by individually changing the relative height position of the reaction force pile with respect to the common mount. That is, the attitude of the first press-fitting device attached to the common mount can be adjusted. Therefore, the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitting pile to be press-fitted into the ground. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
  • the rotary press-in pile construction method of the present invention includes a step of measuring the absolute position of a construction ship that transports the common mount to a predetermined position on the water with a GPS device, and a position information transmitter is attached from the construction ship. Suspending the common platform to the ground at the bottom of the water, and receiving a signal emitted from the position information transmitter with a receiver attached to the construction vessel, thereby allowing the common platform to be relative to the construction vessel. Measuring the absolute position of the common gantry based on the step of measuring the general position, the absolute position of the construction craft, and the relative position of the common gantry with respect to the construction craft And may be further provided.
  • the absolute position of the construction ship is determined by the GPS device attached to the construction ship. Position can be measured. Moreover, the relative position of the common gantry with respect to the construction ship can be measured by receiving a signal generated from the position information transmitter attached to the common gantry with a receiver attached to the construction ship. Thereby, it is possible to accurately know the absolute position of the common mount, that is, the construction position of the rotary press-fit pile.
  • the method for constructing the rotary press-fitting pile of the present invention includes a connecting step of connecting the first base attached with the first press-fitting device and the second base attached with the second press-fitting device with a reaction force transmission bar. Further, it may be provided.
  • the reaction force pile that is set on the second pedestal that is spaced apart from the first gantry to which the first press-fitting device is attached is the reaction force when the rotary squeeze pile is rotationally press-fitted into the ground. It can be countered by using its ability to anchor to the ground.
  • the longer the separation distance between the first frame and the second frame the smaller the rotational reaction force acting on the reaction force pile. For this reason, by appropriately setting the distance between the first frame and the second frame, the reaction force pile can be reduced in size and the depth of penetration of the reaction force pile into the ground can be reduced. The number of force piles can be reduced.
  • the connecting step includes a step of forming a plurality of pin holes at a tip of the reaction force transmission bar provided so as to extend from the first mount, and the plurality of pins A step of inserting and fitting a plurality of pins implanted in the second frame into the holes, respectively;
  • the rotary press-fitting pile is rotationally press-fitted. In doing so, the rotational moment accompanying the rotational reaction force applied to the first frame can be transmitted to the second frame via the reaction force transmission bar. Accordingly, the reaction pile can be made smaller and the depth of penetration of the reaction pile into the ground can be reduced.
  • the method for constructing the rotary press-fitting pile of the present invention may further include a step of adjusting the inclination of the first mount using a plurality of jacks provided on the first mount.
  • the inclination of the first gantry can be adjusted by changing the individual heights of the plurality of jacks. That is, the attitude of the first press-fitting device attached to the first gantry can be adjusted. Therefore, the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitted pile to be rotated and press-fitted to the ground, and the rotary press-fitted pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
  • the present invention by utilizing the fixing force of the small reaction force pile to the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. . For this reason, even if the construction site is submarine ground or lake bottom ground, and it is difficult to use it as a counter force to counteract the self-weight of the device against the reaction force because it receives buoyancy due to water, the rotary press pile Can be press-fitted into the ground.
  • the rotational reaction force and the upward pressing reaction force act on the common base, but the common base is fixed to the ground by the reaction force pile. Therefore, the fixing force of the reaction force pile can be used as a counter force against the rotation reaction force and the upward pressing reaction force when the rotation press-fitting pile is rotationally press-fitted into the ground through the common mount. As a result, the rotary press-fit pile can be press-fitted into the ground without hindrance.
  • reaction force pile is arranged around the first press-fitting device in a well-balanced manner, it is possible to avoid applying a large reaction force to the specific reaction force pile.
  • Individual reaction force piles need only be able to resist relatively small reaction forces. For this reason, each reaction force pile can be reduced in size, and the penetration depth of the reaction force pile into the ground can be set relatively shallow.
  • the posture of the first press-fitting device attached to a common mount can be adjusted, and the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitting pile to be rotationally press-fitted into the ground. Can do. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
  • the absolute position of the common mount that is, the construction position of the rotary press-fit pile can be accurately known.
  • the reaction force pile that is set on the second pedestal spaced apart from the first pedestal to which the first press-fitting device is attached is the reaction force when the rotary squeezed pile is rotationally press-fitted into the ground. It can be countered by using its ability to anchor to the ground.
  • the reaction force pile By appropriately setting the distance between the first frame and the second frame, the reaction force pile can be downsized and the depth of penetration of the reaction force pile into the ground can be reduced. The number can be reduced.
  • the rotational moment accompanying the rotational reaction force applied to the first mount can be transmitted to the second mount via the reaction force transmission bar. Therefore, the reaction pile can be downsized and the penetration depth of the reaction pile can be reduced.
  • the posture of the first press-fitting device attached to the first gantry can be adjusted, and the first press-fitting device arbitrarily adjusts the press-fit angle to the ground of the rotary press-fitting pile to be rotary press-fitted. be able to. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG. 3. It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention. It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention.
  • FIG. 1 is a schematic side view showing a first embodiment of a method for constructing a rotary press-fitting pile according to the present invention.
  • FIG. 2 is a perspective view showing the entire construction apparatus for carrying out the first embodiment.
  • FIG. 3 is a cross-sectional view showing a main part of the construction apparatus. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a sectional view taken along line VV in FIG.
  • FIG. 1 the code
  • symbol 1 is a construction apparatus of a rotary press-fit pile.
  • This rotary press-in pile construction device 1 press-fits a rotary press-in pile P having a spiral blade Pa at its tip while rotating it into the ground (see FIG. 3).
  • the rotary press-in pile construction apparatus 1 is suspended in the sea via a rope 4 by a crane 3 mounted on a construction ship 2.
  • the rotary press-in pile construction device 1 is attached to the base 10 and the central portion on the base 10 and is an all-swivel machine for rotary press-fitting the rotary press-in pile P into the seabed ground G.
  • First press-fitting device 11 and a reaction force pile rotary press-fitting device (second press-fitting device) 12 that rotationally presses the reaction force pile 45 into the seabed ground G.
  • the reaction force pile 45 receives the reaction force when the base 10 is fixed at a predetermined position of the seabed ground G and the rotary press-fit pile P is rotationally press-fitted into the seabed ground G by the all-swivel machine 11.
  • a plurality of pressure pile rotary press-fitting devices 12 are attached to the periphery of the base 10 and are attached every 90 degrees in the circumferential direction around the rotary press-fit pile P. That is, in this embodiment, the all-swivel machine 11 and the reaction force pile rotary press-fitting device 12 are attached to the base 10 that is a common base.
  • the construction ship 2 is provided with a GPS device 13 so that an accurate position of the construction ship 2 is grasped.
  • the transponder 14 which is a position information transmitter which transmits position information is attached to the construction apparatus 1 of a rotary press-fit pile.
  • a signal emitted from the transponder 14 is received by a responder 15 which is a receiver provided in the construction ship 2.
  • the base 10 also serves as a frame of the all-swivel machine 11, and a hole 10 a for inserting the rotary press-fit pile P is formed at the center of the base 10.
  • four bases 20 serving as a frame are erected on the base 10 around the hole 10a at equal intervals in the circumferential direction.
  • An elevating mechanism for supporting the main chuck 22 so as to be movable up and down, for example, a hydraulic cylinder 21 is attached to the column 20.
  • a main chuck 22 that detachably holds the rotary press-fit pile P is attached to the output side base 21 ⁇ / b> A of these hydraulic cylinders 21 via a bearing 23.
  • the main chuck 22 includes a ring-shaped horizontal lower plate 24 rotatably attached to the hydraulic cylinder 21 via the bearing 23, and a ring-shaped horizontal upper plate 25 disposed on the upper side of the horizontal lower plate 24. .
  • the horizontal upper plate 25 is rotatably supported via a bearing 28 on a connecting plate 27 that is attached to an output side base 21A of the hydraulic cylinder 21 via a chuck collar elevating cylinder 26 so as to be movable up and down.
  • a cylindrical body 29 is attached to the upper side of the horizontal lower plate 24.
  • a tapered surface 29a is formed on the inner periphery of the upper portion of the cylindrical body 29. The tapered surface 29a gradually increases in diameter toward the upper side.
  • a plurality of color support blocks 30 are provided below the horizontal upper plate 25 so as to extend radially from the center of the horizontal upper plate 25. That is, the plurality of collar support blocks 30 are arranged radially around the position where the rotary press-fit pile P is arranged.
  • the collar support blocks 30 are connected to the horizontal upper plate 25 via links 31 respectively.
  • the collar support block 30 is located on the center side of the horizontal upper plate 25 (the side where the rotary press-fit pile P is disposed) rather than just below the support position of the link 31 (the connecting portion between the horizontal upper plate 25 and the link 31). It is arranged to be located in.
  • the collar support block 30 is attached to be rotatable along the vertical plane.
  • the collar support block 30 is connected to the horizontal upper plate 25 via the link 31 so that the collar support block 30 is movable in the radial direction of the rotary press-fit pile P with respect to the rotary press-fit pile P.
  • the outer side of the collar support block 30 (the side opposite to the side facing the rotary press-fit pile P) is an inclined surface 30a.
  • the inclined surface 30 a corresponds to the tapered surface 29 a of the cylindrical body 29.
  • main chuck collars 32 are respectively attached to the inside of the collar support block 30 (side facing the rotary press-fit pile P). Inside the main chuck collars 32, a plurality of high friction members 32a are attached at intervals in the vertical direction.
  • each collar support block 30 is guided by the cylindrical body 29 and lowered.
  • the inclined surface 30 a of the collar support block 30 slides downward along the tapered surface 29 a of the cylindrical body 29 and simultaneously moves radially inward of the horizontal upper plate 25.
  • the main chuck collar 32 attached to the collar support block 30 also moves inward in the radial direction together with the collar support block 30, and the rotary press-fitting pile P disposed at the center of the base 10 has a high friction. Grip through the member 32a.
  • each collar support block 30 is raised.
  • the collar support block 30 since the inclined surface 30a of the collar support block 30 is released from the pressing by the tapered surface 29a of the cylindrical body 29, it moves outward in the radial direction of the horizontal upper plate 25 by its own weight. That is, since the collar support block 30 gradually comes out from the cylindrical body 29, the radial inward pressing force received from the cylindrical body 29 gradually decreases. Therefore, the collar support block 30 moves radially outward by its own weight. Accordingly, the main chuck collar 32 attached to the collar support block 30 also moves radially outward together with the collar support block 30 to release the grip on the rotary press-fit pile P. That is, in the main chuck 22, the rotary press-fit pile P can be gripped and released by the main chuck collar 32 by operating the chuck collar elevating cylinder 26 to be shortened or extended.
  • the collar 31 supports the collar support block 30 so as to be positioned closer to the center of the horizontal upper plate 25 than just below the support position of the link 31.
  • the collar support block 30 is configured to move radially outward of the horizontal upper plate 25 by its own weight.
  • the collar support block 30 may be urged so as to move outward in the radial direction of the horizontal upper plate 25 by a spring (not shown).
  • the rotation mechanism 35 includes, for example, a motor that is a rotation source attached to the frame or the hydraulic cylinder 21, and a transmission system that transmits the rotational force of the motor, and the rotation of the output portion of the transmission system is the horizontal lower plate 24 or It is transmitted to the horizontal upper plate 25.
  • An upper sub chuck 40 is disposed above the main chuck 22, and a lower sub chuck 41 is disposed below the main chuck 22.
  • the upper sub-chuck 40 is attached radially to the upper end of the hydraulic cylinder 21 around the position where the rotary press-fit pile P to be grasped is disposed.
  • the lower sub-chuck 41 is attached radially to each column 20 constituting the frame, centering on the position where the rotary press-fit pile P to be grasped is arranged.
  • the upper sub chuck 40 and the lower sub chuck 41 are constituted by, for example, a hydraulic cylinder or an air cylinder.
  • the rotary press-fit pile P can be relatively moved up and down simultaneously while holding the rotary press-fit pile P.
  • a roller is installed.
  • the reaction force pile rotary press-fitting device 12 has basically the same configuration as the all-swivel machine 11.
  • the difference of the reaction force pile rotary press-fitting device 12 with respect to the entire turning machine 11 is that the upper sub-chuck 40 and the lower sub-chuck 41 are not provided, the main chuck 22, the rotation mechanism 35 for rotating the main chuck 22, and the main chuck 22.
  • the lifting mechanism that lifts and lowers each is smaller than that of the above-described all-swivel machine 11, and the reaction force pile having the spiral blade 45a at the tip is the object to be rotationally pressed by the reaction force pile rotation press-fitting device 12. 45 (small rotary press-fit pile).
  • FIG. 1 a rotary press-in pile construction method in which the rotary press-in pile P is rotationally press-fitted into the seabed ground G using the rotary press-in pile construction apparatus 1 having the above-described configuration will be described with reference to FIG. 1 and FIGS.
  • the construction ship 2 transports it to a predetermined position on the sea.
  • the crane 3 mounted on the construction ship 2 suspends the rotary press-in pile construction apparatus 1 to the seabed via the rope 4.
  • the rotary press-fit pile P is assembled in advance to the rotary press-fit pile construction device 1.
  • the rotary press-fit pile P may be temporarily fixed to the construction apparatus 1 by gripping by the upper sub-chuck 40 and the lower sub-chuck 41 or by gripping by the main chuck 22, and furthermore, the upper sub-chuck 40.
  • the gripping by the lower sub-chuck 41 and the gripping by the main chuck 22 may be used in combination.
  • the position of the construction ship 2 can be accurately known in real time by the GPS device 13 mounted on the construction ship 2 although it is difficult to accurately grasp the construction ship 2 itself because of the influence of the wind. .
  • the rotary press-in pile construction device 1 moves in the horizontal direction under the influence of the tidal current.
  • the relative position of the rotary press-in pile construction device 1 with respect to the construction ship 2 is that the responder 15 of the construction boat 2 receives a position signal transmitted from the transponder 14 attached to the rotary press-in pile construction device 1. To know more accurately.
  • the position of the rotary press-in pile construction apparatus 1 and, in turn, the position of the rotary press-in pile P to be rotary press-fitted in the future can be accurately known by the position grasping system including these GPS device 13, transponder 14 and responder 15.
  • the rotary press-in pile construction device 1 When the rotary press-in pile construction device 1 reaches the seabed ground G, it is determined whether or not the position of the rotary press-in pile construction device 1 is a desired position. As a result of the determination, if the position of the rotary press-in pile construction device 1 is deviated from the desired position, the rotary press-in pile construction device 1 is pulled up via the rope 4, the construction ship 2 is moved, and the rotary press-in again. It adjusts so that the position of the construction apparatus 1 of a pile may become a desired position.
  • each reaction force pile 45 is rotationally pressed into the seabed ground G by the reaction force pile rotation press-fitting device 12 (reaction force pile rotation press-fitting step).
  • the rotational press-fitting of the reaction force pile 45 is substantially the same as the method using the all-swivel machine 11 described later, and the description thereof is omitted here.
  • the rotational reaction force generated when the reaction force pile 45 is rotated may be suppressed by using its own weight, but is canceled by, for example, reversing the rotation directions of the reaction force piles 45.
  • the reaction force pile 45 is rotationally press-fitted into the seabed ground G to a predetermined depth.
  • the individual relative height positions of the reaction force pile 45 with respect to the base 10 by the lifting mechanism incorporated in the reaction force pile rotary press-fitting device 12.
  • substrate 10 is adjusted so that the base
  • FIG. 9 is a process diagram showing a method for constructing a rotary press-fitting pile using the rotary press-fitting pile construction device of the embodiment of the present invention.
  • 10 to 15 are process explanatory views showing details of the method for constructing the rotary press-fit pile.
  • the chuck collar elevating cylinder 26 is operated to be shortened, and the collar support block 30 is moved to the center side of the horizontal upper plate 25 via the tapered surface 29 a of the cylindrical body 29. That is, it is moved so as to approach the rotary press-fit pile P.
  • the main chuck 22 finally holds the rotary press-fitting pile P via the main chuck collar 32 and the high friction member 32a.
  • the grip of the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released.
  • the hydraulic cylinder 21 that has been in an extended state is operated to be shortened to apply a downward pressing force to the rotary press-fit pile P, and the rotation mechanism 35 (see FIG. 3)
  • the chuck 22 is rotated in a predetermined direction.
  • the spiral blade Pa attached to the tip of the rotary press-fit pile P is rotated in a predetermined direction while being pressed downward.
  • the rotary press-fit pile P is rotationally press-fitted downward in the seabed ground G by a screw action (rotary press-fit pile rotary press-in process).
  • reaction force rotation reaction force and pressing reaction force upward
  • the reaction force pile rotary press-fitting device 12 has already been rotary press-fitted into the seabed ground G.
  • the made reaction force pile 45 opposes the reaction force. That is, since the base 10 is fixed to the seabed ground G by the reaction force pile 45, the base 10 is separated from the seabed ground G by the upward pressing reaction force, and the base 10 is rotated by the rotational reaction force.
  • Each of the press-in piles P can be prevented from rotating in the opposite direction.
  • the operation is performed to extend the hydraulic cylinder 21, and the main chuck 22 released from the gripping of the rotary press-fit pile P is raised.
  • the upper sub chuck 40 is also raised integrally with the main chuck 22 because the upper sub chuck 40 is attached to the output side of the hydraulic cylinder 21.
  • the roller is attached to the part which contact
  • the tip of the upper sub-chuck 40 holds the rotary press-fit pile P while rolling on the outer peripheral surface of the rotary press-fit pile P via the roller. That is, the upper sub-chuck 40 can grip the rotary press-fit pile P while changing the contact position with respect to the rotary press-fit pile P.
  • the hydraulic cylinder 21 After moving the main chuck 22 to the upper limit position, the hydraulic cylinder 21 is stopped. Then, as shown in FIG. 15, while continuing to hold the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41, the chuck collar lifting cylinder 26 is operated to be shortened, and the rotary press-fit pile by the main chuck 22 is operated. Hold P.
  • the gripping by the main chuck 22 is completed, the gripping of the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released (refilling step). Thereafter, the rotary press-in pile P can be reached to a predetermined depth of the seabed ground G by repeatedly performing the rotary press-in pile rotary press-in process shown in FIGS. 10 and 11 and the refilling process shown in FIGS. .
  • the holding position of the rotary press-fit pile P by the main chuck 22 is changed, that is, when refilling, the rotary press-fit pile P is placed by the upper sub-chuck 40 and the lower sub-chuck 41 respectively arranged on the upper side and the lower side of the main chuck 22. Therefore, the core of the rotary press-fit pile P does not shift with respect to the construction device 1 of the rotary press-fit pile.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the entire swivel machine 11 and the reaction force pile rotation press-fitting device 12 that are rotary press-fitting pile rotary press-fits are attached to the base 10 that is a common gantry.
  • the machine 11 and the reaction force pile rotary press-fitting device 12 are each attached to separate platforms, and these platforms are connected by a reaction force transmission bar. That is, in 2nd Embodiment, as shown to FIG. 18A, the whole turning machine 11 is attached to the 1st mount 51, the reaction force pile rotation press-fitting apparatus 12 is attached to the 2nd mount 52, and the 1st mount 51 and The second mount 52 is connected by a reaction force transmission bar 53.
  • the second gantry 52 including the reaction force pile rotation press-fitting device 12 in which the reaction force pile 45 is incorporated in advance is transported by a construction ship, and a crane is installed. Is suspended at a predetermined position on the seabed G by a rope extending from the bottom.
  • a plurality of spike members 54 are attached to the lower surface of the second gantry 52 so that the lower ends are sharp and pierce the seabed ground G.
  • a plurality of (for example, two) guide pins 55 around the reaction force pile rotation press-fitting device 12 are provided on the upper surface of the second mount 52. It is attached every 90 degrees in the circumferential direction.
  • a transponder (not shown) for transmitting position information of the second gantry 52 is set on the second gantry 52.
  • the reaction force is applied using the reaction force pile rotary press-fitting device 12 on the second gantry 52 as shown in FIG.
  • the pile 45 is rotated and press-fitted into the seabed ground G by being rotated by the rotating mechanism while being pressed downward by the lifting mechanism while being held by the holding mechanism.
  • the rotational reaction force at this time is suppressed using the spike member 54, and the upward pressing reaction force is suppressed using the weight of the second gantry 52 and the reaction force pile rotation press-fitting device 12.
  • the reaction force pile 45 is rotationally press-fitted to a predetermined depth of the seabed ground G, as shown in FIG. 18A
  • the first gantry 51 including the entire turning machine 11 in which the rotary press-fitting pile P is incorporated in advance is removed from the crane. It is suspended at a predetermined position on the seabed ground G by the extending rope.
  • the reaction force transmission bar 53 extends from the side portion of the entire turning machine 11.
  • a plurality of (for example, two) pin holes 53 a are formed in the tip diameter enlarged portion of the reaction force transmission bar 53 so as to be orthogonal to the longitudinal direction of the reaction force transmission bar 53.
  • the first mount 51 is suspended while being positioned on the seabed ground G so that the guide pins 55 of the second mount 52 are respectively inserted into the plurality of pin holes 53a (connection process / pin insertion fitting). Process).
  • the positioning at this time is performed, for example, by monitoring the insertion state of the guide pin 55 into the pin hole 53a by a camera (not shown) provided at the tip of the reaction force transmission bar 53.
  • the reaction force transmission bar 53 includes a length adjusting means 56 that adjusts the length of the reaction force transmission bar 53 itself, and a distal end (tip end) of the reaction force transmission bar 53 with respect to the proximal end side.
  • Rotating means 57 for adjusting the angle of the (expanded portion) are respectively attached.
  • a counter 58 is attached to a side portion of the entire turning machine 11 opposite to the side where the reaction force transmission bar 53 is attached.
  • the lengths of the plurality of jacks 59 attached to the lower surface of the first gantry 51 are adjusted as shown in FIG.
  • the inclination of the first gantry 51 is adjusted, for example, along a horizontal plane (first gantry inclination adjusting step).
  • the rotary press-fitting pile P is rotary press-fitted into the seabed ground G using the all-swivel machine 11 as described in the first embodiment (see FIG. 20). At this time, as shown in FIG.
  • the reaction force (rotational reaction force) when the rotary press-fit pile P is press-fitted into the seabed ground G is counteracted by the fixing force of the reaction force pile 45 attached to the second mount 52. It is obtained via the force transmission bar 53. That is, the rotational reaction force generated when the rotary press-fit pile P is rotationally press-fitted into the seabed ground G is transmitted to the reaction force pile 45 through the reaction force transmission bar 53, but the reaction force pile 45 has already settled on the seabed ground G. Therefore, it can counter the rotational reaction force.
  • the longer the distance between the first frame 51 and the second frame 52 the smaller the rotational reaction force acting on the reaction force pile 45.
  • the reaction force pile 45 can be reduced in size and the reaction force pile 45 can be penetrated into the seabed G.
  • the number of reaction force piles 45 can be reduced.
  • the number of reaction force piles 45 attached by the second mount 52 can be one.
  • two or more reaction force piles 45 may be used.
  • the inclination of these mounts is adjusted so that the common base
  • the tilt of the gantry may be adjusted so as to be orthogonal to the ground (so as to be parallel to the ground).
  • the guide pin 55 is planted on the upper surface of the second gantry 52, and the pin hole 53 a is provided at the tip of the reaction force transmission bar 53 extending from the all-swivel machine 11. Although it is set as the structure inserted in the pin hole 53a, it is not restricted to this.
  • reaction force pile rotation press-fit apparatus 12 which has the reaction force pile 45 is provided with respect to one all the turning machine 11, it is not restricted to this.
  • a plurality of reaction force pile rotary press-fitting devices 12 having reaction force piles 45 may be provided for one all-swivel machine 11.
  • the present invention by utilizing the fixing force of the small reaction force pile to the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. .
  • the rotary press pile Can be press-fitted into the ground. Therefore, it has industrial applicability.
  • Rotary press-fit pile construction device Construction ship 3 Crane 4 Rope 10 Base (common mount) 10a hole 11 All-swivel machine (Rotary press-fit pile rotary press-fit device) 12 Reaction force pile rotary press-fit device 13 GPS device 14 Transponder (position information) Transmitter) 15 Responder (receiver) 20 Strut 21 Hydraulic cylinder (lifting mechanism) 22 Main chuck (gripping device) 24 Horizontal lower plate 25 Horizontal upper plate 26 Chuck collar lifting cylinder 30 Color support block 32 Main chuck collar 35 Rotating mechanism 40 Upper sub-chuck 41 Lower sub-chuck 45 Reaction force pile 45a Spiral blade 51 First frame 52 Second frame 53 Reaction force transmission bar 53a Pin hole 54 Spike member 55 Guide pin (Pi ) 58 counter P rotation press pile Pa spiral blade G Seabed

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Abstract

The present invention is provided with: a step for causing the rotary pressing-in of a rotary press-in pile (P) into the ground (G) by means of rotating the rotary press-in pile (P), which has a helical blade (Pa) at the tip thereof, while pressing downwards; and a step for causing the rotary pressing into the ground (G) of a reaction pile (45) that is smaller than the rotary press-in pile (P) and that has a helical blade (45a) at the tip thereof. The rotary reaction force and upwardly pressing reaction force arising when causing the rotary pressing-in of the rotary press-in pile (P) into the ground (G) are caused to be borne by the reaction pile (45), which is applied first.

Description

回転圧入杭の施工方法Construction method of rotary press-fit pile
　本発明は、先端に螺旋羽根を備えた回転圧入杭を地盤に回転させながら圧入する、回転圧入杭の施工方法に関するものである。
　本願は、２０１２年１２月２８日に日本に出願された特願２０１２－２８８１１１号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a method for constructing a rotary press-fit pile that press-fits a rotary press-fit pile having a spiral blade at its tip while rotating it on the ground.
This application claims priority based on Japanese Patent Application No. 2012-288111 for which it applied to Japan on December 28, 2012, and uses the content here.
　上記回転圧入杭を地盤に回転させながら圧入するものとして、下記特許文献１に記載のものが知られている。
　特許文献１に記載された装置は、回転圧入杭を着脱可能に把持する把持機構と、回転圧入杭を把持した状態で把持機構を回転させる回転機構と、回転圧入杭に推進力を付与すべく、把持機構を昇降自在に支持する昇降機構とを有する全旋回機を備えるものである。
　そして、この装置を用いて回転圧入杭を回転圧入する場合には、把持機構により回転圧入杭を把持した状態で回転機構により把持機構を回転させ、かつ、昇降機構により把持機構を下降させることを、回転圧入杭の長さ方向に沿って把持機構による回転圧入杭への把持位置を変えながら（つまり盛り替えながら）、所定長ずつ繰り返す。 The thing of the following patent document 1 is known as what press-fits while rotating the said rotation press-fit pile to the ground.
The apparatus described in Patent Document 1 is intended to apply a propulsive force to a rotary press-fit pile, a gripping mechanism that detachably holds the rotary press-fit pile, a rotary mechanism that rotates the gripping mechanism while holding the rotary press-fit pile, And an all-swivel machine having an elevating mechanism that supports the gripping mechanism so as to be movable up and down.
And when rotating press-fitting piles using this device, the gripping mechanism is rotated by the rotating mechanism while the rotary press-fitting pile is gripped by the gripping mechanism, and the gripping mechanism is lowered by the lifting mechanism. Then, while changing the gripping position of the rotary press-fitted pile by the gripping mechanism along the length direction of the rotary press-fitted pile (that is, changing the position), it is repeated by a predetermined length.
日本国特開２００１－１４６７４４号公報Japanese Unexamined Patent Publication No. 2001-146744
　特許文献１に記載された回転圧入杭の施工方法では、基本的に、全旋回機によって回転圧入杭を下方へ押圧しながら回転させることにより、回転圧入杭を地盤に回転圧入する。このため、回転圧入杭を回転圧入するときには、全旋回機あるいは全旋回機が搭載される架台に、前記回転圧入杭の回転と逆方向の回転反力並びに上方への押圧反力が加わる。したがって、これら反力に対抗するように、全旋回機あるいは全旋回機が搭載される架台を支持する必要がある。 In the construction method of the rotary press-fit pile described in Patent Document 1, basically, the rotary press-fit pile is rotationally press-fitted into the ground by rotating the rotary press-fit pile while pressing it downward with an all-swivel machine. For this reason, when rotationally press-fitting a rotary press-fit pile, a rotational reaction force in the direction opposite to the rotation of the rotary press-fit pile and an upward pressing reaction force are applied to the entire turning machine or a mount on which the entire turning machine is mounted. Therefore, it is necessary to support the all-swivel machine or the mount on which the all-swing machine is mounted so as to counter these reaction forces.
　施工場所が陸上の場合、全旋回機や全旋回機が搭載される架台の自重を利用できるため、それら反力に対抗できる。しかしながら、施工場所が水中である場合、浮力を受けるため、反力に十分に対抗することが難しい。 When the construction site is on land, all the revolving machines and the weight of the gantry on which all the revolving machines are mounted can be used. However, when the construction site is underwater, it receives buoyancy, so it is difficult to sufficiently counter the reaction force.
　本発明は、上記事情に鑑みなされたものであり、施工場所が海底地盤あるいは湖底地盤のときであっても、回転圧入杭を回転圧入する際に、反力に十分に対抗することができ、回転圧入杭を支障なく回転圧入できる回転圧入杭の施工方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and even when the construction site is the seabed ground or the lakebed ground, when the rotary press-in pile is rotationally press-fitted, it can sufficiently counter the reaction force, An object of the present invention is to provide a method for constructing a rotary press-fit pile that can press-fit the rotary press-fit pile without any trouble.
　本発明の一態様に係る回転圧入杭の施工方法は、先端に螺旋羽根を有する回転圧入杭を下方へ押圧しながら回転させることにより、該回転圧入杭を地盤に回転圧入する工程と、先端に螺旋羽根を有し、前記回転圧入杭よりも小型の反力杭を地盤に回転圧入する工程と、を備え、前記回転圧入杭を地盤に回転圧入する際に生じる回転反力及び上方への押圧反力を、先に施工された前記反力杭に負担させる、ことを特徴とする。 A method for constructing a rotary press-fit pile according to one aspect of the present invention includes a step of rotating and press-fitting the rotary press-fit pile into the ground by rotating the rotary press-fit pile having a spiral blade at the tip while pressing downward. And a step of rotating and pressing a reaction force pile smaller than the rotary press-fitting pile into the ground, and the rotational reaction force generated when the rotary press-fitting pile is press-fitted into the ground and the upward pressing The reaction force is borne on the reaction force pile previously constructed.
　本発明によれば、先端に螺旋羽根を有する小型の反力杭を地盤に回転圧入する。そして、この小型の反力杭の地盤への定着力を利用することによって、回転圧入杭を地盤に回転圧入する際の回転反力及び上方への押圧反力に対抗することができる。つまり、回転圧入杭を地盤に回転圧入する際、回転圧入杭に作用する回転反力及び上方への押圧反力を、反力杭に負担させる（担わせる）ことができる。したがって、たとえ、施工場所が海底地盤あるいは湖底地盤であって、水による浮力を受けるため装置の自重等を反力に対抗するための対抗力として利用しにくい場合であっても、回転圧入杭を地盤に回転圧入することができる。 According to the present invention, a small reaction force pile having a spiral blade at the tip is rotationally press-fitted into the ground. Then, by utilizing the fixing force of the small reaction force pile on the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. That is, when the rotary press-fit pile is rotationally press-fitted into the ground, the reaction force pile can be caused to bear the rotational reaction force acting on the rotary press-fit pile and the upward pressing reaction force. Therefore, even if the construction site is submarine ground or lake bottom ground and the buoyancy due to water is received, it is difficult to use the rotary press-fit pile as a counter force to counteract the reaction force such as its own weight. It can be press-fitted into the ground.
　本発明の回転圧入杭の施工方法は、前記回転圧入杭を地盤に回転圧入する第１圧入装置と、前記反力杭を地盤に回転圧入する第２圧入装置とが、共通の架台に取り付けられていてもよい。 In the construction method of the rotary press-fitting pile of the present invention, the first press-fitting device for rotary press-fitting the rotary press-fitting pile into the ground and the second press-fitting device for rotary press-fitting the reaction force pile into the ground are attached to a common frame. It may be.
　この発明によれば、回転圧入杭を地盤に回転圧入する際、回転反力及び上方への押圧反力が共通の架台に作用する。ところが、共通の架台は反力杭によって地盤に定着される。このため、共通の架台を通して、反力杭の定着力を、回転圧入杭を地盤に回転圧入する際の回転反力及び上方への押圧反力に対抗する対抗力として利用することができる。したがって、回転圧入杭を支障なく、地盤に回転圧入することができる。 According to the present invention, when the rotary press-fitting pile is rotary press-fitted into the ground, the rotational reaction force and the upward pressing reaction force act on the common frame. However, the common platform is fixed to the ground by reaction piles. For this reason, the fixing force of the reaction force pile can be used as a counter force against the rotation reaction force and the upward pressing reaction force when the rotation press-fitting pile is rotationally press-fitted into the ground through the common mount. Therefore, the rotary press-fit pile can be press-fitted into the ground without hindrance.
　本発明の回転圧入杭の施工方法は、前記第２圧入装置が、前記第１圧入装置を中心としてその周りに複数個取り付けられていてもよい。 In the construction method of the rotary press-fitting pile of the present invention, a plurality of the second press-fitting devices may be attached around the first press-fitting device.
　この発明によれば、回転圧入杭を地盤に回転圧入する際、第１圧入装置を中心としてその周りに配置した複数の反力杭の地盤への定着力を利用して、回転反力及び上方への押圧反力に対抗できる。
　このように、反力杭を第１圧入装置の周りにバランスよく配置するので、特定の反力杭に大きな反力が加わるのを回避でき、個々の反力杭を比較的小さな反力に対抗できる構造とすれば足りる。このため、個々の反力杭を小型化することができ、かつ、反力杭の地盤への侵入深さを比較的浅く設定することができる。 According to this invention, when the rotary press-fit pile is rotary press-fitted into the ground, the rotational reaction force and the upper direction are utilized by utilizing the fixing force to the ground of the plurality of reaction force piles arranged around the first press-fit device. It can counter the pressure reaction force against
In this way, the reaction force piles are arranged in a well-balanced manner around the first press-fitting device, so that a large reaction force can be avoided from being applied to a specific reaction force pile, and each reaction force pile can be opposed to a relatively small reaction force. A structure that can be used is sufficient. For this reason, each reaction force pile can be reduced in size, and the penetration depth of the reaction force pile into the ground can be set relatively shallow.
　本発明の回転圧入杭の施工方法は、前記共通の架台に対する前記反力杭の相対的な高さ位置を個々に変えることによって、前記共通の架台の傾きを調整する工程をさらに備えてもよい。 The construction method of the rotary press-fitting pile of the present invention may further include a step of adjusting the inclination of the common mount by individually changing a relative height position of the reaction force pile with respect to the common mount. .
　この発明によれば、前記共通の架台に対する反力杭の相対的な高さ位置を個々に変えることによって、共通の架台の傾きを調整することができる。つまり、共通の架台に取り付けた第１圧入装置の姿勢を調整することができる。したがって、当該第１圧入装置によって、回転圧入する回転圧入杭の地盤への圧入角度を任意に調整することができる。このため、回転圧入杭を地盤表面に対して垂直に圧入することができる。また、地盤表面がたとえ傾斜している場合であっても、回転圧入杭を鉛直方向に圧入することも可能である。 According to the present invention, the inclination of the common mount can be adjusted by individually changing the relative height position of the reaction force pile with respect to the common mount. That is, the attitude of the first press-fitting device attached to the common mount can be adjusted. Therefore, the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitting pile to be press-fitted into the ground. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
　本発明の回転圧入杭の施工方法は、前記共通の架台を水上の所定位置まで運搬する施工船の絶対的な位置をＧＰＳ装置で測定する工程と、前記施工船から、位置情報発信器が取り付けられた前記共通の架台を水底の地盤まで吊り下げる工程と、前記位置情報発信器から発せられる信号を前記施工船に取り付けた受信器で受信することにより、前記施工船に対する前記共通の架台の相対的な位置を測定する工程と、前記施工船の絶対的な位置と、前記施工船に対する前記共通の架台の相対的な位置とに基づいて、前記共通の架台の絶対的な位置を測定する工程と、をさらに備えてもよい。 The rotary press-in pile construction method of the present invention includes a step of measuring the absolute position of a construction ship that transports the common mount to a predetermined position on the water with a GPS device, and a position information transmitter is attached from the construction ship. Suspending the common platform to the ground at the bottom of the water, and receiving a signal emitted from the position information transmitter with a receiver attached to the construction vessel, thereby allowing the common platform to be relative to the construction vessel. Measuring the absolute position of the common gantry based on the step of measuring the general position, the absolute position of the construction craft, and the relative position of the common gantry with respect to the construction craft And may be further provided.
　この発明によれば、海底地盤や湖底地盤に回転圧入杭を回転圧入する場合であって、その圧入位置の測定が困難な場合であっても、施工船に取り付けたＧＰＳ装置によって施工船の絶対的な位置を測定することができる。また、共通の架台に取り付けた位置情報発信器から発せられる信号を施工船に取り付けた受信器で受信することにより、施工船に対する共通の架台の相対的な位置を測定することができる。これによって、共通の架台の絶対的な位置、すなわち、回転圧入杭の施工位置を正確に知ることができる。 According to the present invention, even when the rotary press-fitting pile is rotary press-fitted into the seabed ground or the lake bottom ground, and the measurement of the press-fit position is difficult, the absolute position of the construction ship is determined by the GPS device attached to the construction ship. Position can be measured. Moreover, the relative position of the common gantry with respect to the construction ship can be measured by receiving a signal generated from the position information transmitter attached to the common gantry with a receiver attached to the construction ship. Thereby, it is possible to accurately know the absolute position of the common mount, that is, the construction position of the rotary press-fit pile.
　本発明の回転圧入杭の施工方法は、前記第１圧入装置を取り付けた第１の架台と、前記第２圧入装置を取り付けた第２の架台と、を反力伝達バーで連結する連結工程をさらに備えてもよい。 The method for constructing the rotary press-fitting pile of the present invention includes a connecting step of connecting the first base attached with the first press-fitting device and the second base attached with the second press-fitting device with a reaction force transmission bar. Further, it may be provided.
　この発明によれば、回転圧入杭を地盤に回転圧入する際の反力に、第１圧入装置を取り付けた第１の架台から離間して配置された第２の架台にセットされる反力杭の地盤への定着力を利用して対抗できる。ここで、第１の架台と第２の架台との離間距離が長くなればなるほど、反力杭に作用する回転反力は小さくなる。このため、第１の架台と第２の架台との離間距離を適宜設定することで、反力杭の小型化や反力杭の地盤への侵入深さを浅くすることができ、しかも、反力杭の本数を少なくできる。 According to this invention, the reaction force pile that is set on the second pedestal that is spaced apart from the first gantry to which the first press-fitting device is attached is the reaction force when the rotary squeeze pile is rotationally press-fitted into the ground. It can be countered by using its ability to anchor to the ground. Here, the longer the separation distance between the first frame and the second frame, the smaller the rotational reaction force acting on the reaction force pile. For this reason, by appropriately setting the distance between the first frame and the second frame, the reaction force pile can be reduced in size and the depth of penetration of the reaction force pile into the ground can be reduced. The number of force piles can be reduced.
　本発明の回転圧入杭の施工方法は、前記連結工程は、前記第１の架台から延長するように設けた前記反力伝達バーの先端に複数のピン孔を形成する工程と、前記複数のピン孔に、前記第２の架台に植設した複数のピンをそれぞれ挿入して嵌合させる工程と、をさらに備えてもよい。 In the method for constructing the rotary press-fitting pile of the present invention, the connecting step includes a step of forming a plurality of pin holes at a tip of the reaction force transmission bar provided so as to extend from the first mount, and the plurality of pins A step of inserting and fitting a plurality of pins implanted in the second frame into the holes, respectively;
　この発明によれば、反力伝達バーの先端に形成した複数のピン孔に第２の架台に植設した複数のピンをそれぞれ挿入嵌合させる工程を備えているので、回転圧入杭を回転圧入する際に、第１の架台に加わる回転反力に伴う回転モーメントを、反力伝達バーを介して第２の架台に伝達することができる。その分、反力杭の小型化や反力杭の地盤への侵入深さを浅くすることができる。 According to this invention, since the step of inserting and fitting the plurality of pins implanted in the second frame into the plurality of pin holes formed at the tip of the reaction force transmission bar is provided, the rotary press-fitting pile is rotationally press-fitted. In doing so, the rotational moment accompanying the rotational reaction force applied to the first frame can be transmitted to the second frame via the reaction force transmission bar. Accordingly, the reaction pile can be made smaller and the depth of penetration of the reaction pile into the ground can be reduced.
　本発明の回転圧入杭の施工方法は、前記第１の架台に設けた複数のジャッキによって該第１の架台の傾きを調整する工程をさらに備えてもよい。 The method for constructing the rotary press-fitting pile of the present invention may further include a step of adjusting the inclination of the first mount using a plurality of jacks provided on the first mount.
　この発明によれば、複数のジャッキの個々の高さを変えることによって、第１の架台の傾きを調整することができる。つまり、第１の架台に取り付けた第１圧入装置の姿勢を調整することができる。したがって、当該第１圧入装置によって、回転圧入する回転圧入杭の地盤への圧入角度を任意に調整することができ、回転圧入杭を地盤表面に対して垂直に圧入することができる。また、地盤表面がたとえ傾斜している場合であっても、回転圧入杭を鉛直方向に圧入することも可能である。 According to the present invention, the inclination of the first gantry can be adjusted by changing the individual heights of the plurality of jacks. That is, the attitude of the first press-fitting device attached to the first gantry can be adjusted. Therefore, the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitted pile to be rotated and press-fitted to the ground, and the rotary press-fitted pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
　本発明によれば、小型の反力杭の地盤への定着力を利用することによって、回転圧入杭を地盤に回転圧入する際の回転反力及び上方への押圧反力に対抗することができる。このため、たとえ、施工場所が海底地盤あるいは湖底地盤であって、水による浮力を受けるため装置の自重等を反力に対抗するための対抗力として利用しにくい場合であっても、回転圧入杭を地盤に回転圧入することができる。 According to the present invention, by utilizing the fixing force of the small reaction force pile to the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. . For this reason, even if the construction site is submarine ground or lake bottom ground, and it is difficult to use it as a counter force to counteract the self-weight of the device against the reaction force because it receives buoyancy due to water, the rotary press pile Can be press-fitted into the ground.
　本発明によれば、回転圧入杭を地盤に回転圧入する際、回転反力及び上方への押圧反力が共通の架台に作用することとなるが、共通の架台は反力杭によって地盤に定着されるため、共通の架台を通して、反力杭の定着力を、回転圧入杭を地盤に回転圧入する際の回転反力及び上方への押圧反力に対抗する対抗力として利用することができる。この結果、回転圧入杭を支障なく、地盤に回転圧入することができる。 According to the present invention, when rotationally press-fitting a rotary press-fit pile into the ground, the rotational reaction force and the upward pressing reaction force act on the common base, but the common base is fixed to the ground by the reaction force pile. Therefore, the fixing force of the reaction force pile can be used as a counter force against the rotation reaction force and the upward pressing reaction force when the rotation press-fitting pile is rotationally press-fitted into the ground through the common mount. As a result, the rotary press-fit pile can be press-fitted into the ground without hindrance.
　本発明によれば、反力杭を第１圧入装置の周りにバランスよく配置しているので、特定の反力杭に大きな反力が加わるのを回避できる。個々の反力杭は比較的小さな反力に対抗できれば足りる。このため、個々の反力杭を小型化することができ、かつ、反力杭の地盤への侵入深さを比較的浅く設定することができる。 According to the present invention, since the reaction force pile is arranged around the first press-fitting device in a well-balanced manner, it is possible to avoid applying a large reaction force to the specific reaction force pile. Individual reaction force piles need only be able to resist relatively small reaction forces. For this reason, each reaction force pile can be reduced in size, and the penetration depth of the reaction force pile into the ground can be set relatively shallow.
　本発明によれば、共通の架台に取り付けた第１圧入装置の姿勢を調整することができ、当該第１圧入装置によって、回転圧入する回転圧入杭の地盤への圧入角度を任意に調整することができる。このため、回転圧入杭を地盤表面に対して垂直に圧入することができる。また、地盤表面がたとえ傾斜している場合であっても、回転圧入杭を鉛直方向に圧入することも可能である。 According to the present invention, the posture of the first press-fitting device attached to a common mount can be adjusted, and the first press-fitting device can arbitrarily adjust the press-fit angle of the rotary press-fitting pile to be rotationally press-fitted into the ground. Can do. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
　本発明によれば、共通の架台の絶対的な位置、すなわち、回転圧入杭の施工位置を正確に知ることができる。 According to the present invention, the absolute position of the common mount, that is, the construction position of the rotary press-fit pile can be accurately known.
　本発明によれば、回転圧入杭を地盤に回転圧入する際の反力に、第１圧入装置を取り付けた第１の架台から離間して配置された第２の架台にセットされる反力杭の地盤への定着力を利用して対抗できる。第１の架台と第２の架台との離間距離を適宜設定することで、反力杭の小型化や反力杭の地盤への侵入深さを浅くすることができ、しかも、反力杭の本数を少なくできる。 According to the present invention, the reaction force pile that is set on the second pedestal spaced apart from the first pedestal to which the first press-fitting device is attached is the reaction force when the rotary squeezed pile is rotationally press-fitted into the ground. It can be countered by using its ability to anchor to the ground. By appropriately setting the distance between the first frame and the second frame, the reaction force pile can be downsized and the depth of penetration of the reaction force pile into the ground can be reduced. The number can be reduced.
　本発明によれば、回転圧入杭を回転圧入する際に、第１の架台に加わる回転反力に伴う回転モーメントを、反力伝達バーを介して第２の架台に伝達することができ、その分、反力杭の小型化や反力杭の地盤への侵入深さを浅くすることができる。 According to the present invention, when rotationally press-fitting a rotary press-fit pile, the rotational moment accompanying the rotational reaction force applied to the first mount can be transmitted to the second mount via the reaction force transmission bar. Therefore, the reaction pile can be downsized and the penetration depth of the reaction pile can be reduced.
　本発明によれば、第１の架台に取り付けた第１圧入装置の姿勢を調整することができ、当該第１圧入装置によって、回転圧入する回転圧入杭の地盤への圧入角度を任意に調整することができる。このため、回転圧入杭を地盤表面に対して垂直に圧入することができる。また、地盤表面がたとえ傾斜している場合であっても、回転圧入杭を鉛直方向に圧入することも可能である。 According to the present invention, the posture of the first press-fitting device attached to the first gantry can be adjusted, and the first press-fitting device arbitrarily adjusts the press-fit angle to the ground of the rotary press-fitting pile to be rotary press-fitted. be able to. For this reason, the rotary press-fit pile can be press-fitted perpendicularly to the ground surface. Moreover, even if the ground surface is inclined, it is possible to press-fit the rotary press-fit pile in the vertical direction.
本発明の回転圧入杭の施工方法の第１実施形態を示す概略側面図である。It is a schematic side view which shows 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 第１実施形態を実施する施工装置の全体を示す斜視図である。It is a perspective view which shows the whole construction apparatus which implements 1st Embodiment. 施工装置の要部を示す断面図である。It is sectional drawing which shows the principal part of a construction apparatus. 図３のIV－IV線に沿う断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. 図３のV－V線に沿う断面図である。FIG. 5 is a cross-sectional view taken along line VV in FIG. 3. 本発明の回転圧入杭の施工方法の第１実施形態を説明する工程説明図である。It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態を説明する工程説明図である。It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態を説明する工程説明図である。It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態を説明する工程説明図である。It is process explanatory drawing explaining 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第１実施形態の詳細を説明する工程説明図である。It is process explanatory drawing explaining the detail of 1st Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図であり、施工装置の概略側面図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention, and is a schematic side view of a construction apparatus. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図であり、施工装置の要部の平面図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention, and is a top view of the principal part of a construction apparatus. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention. 本発明の回転圧入杭の施工方法の第２実施形態を説明する工程説明図である。It is process explanatory drawing explaining 2nd Embodiment of the construction method of the rotary press-fit pile of this invention.
〈第１実施形態〉
　以下、本発明の第１実施形態を図１～図１５を参照して説明する。
　図１は本発明の回転圧入杭の施工方法の第１実施形態を示す概略側面図である。図２は第１実施形態を実施する施工装置の全体を示す斜視図である。図３は施工装置の要部を示す断面図である。図４は図３のIV－IV線に沿う断面図である。図５は図３のV－V線に沿う断面図である。 <First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic side view showing a first embodiment of a method for constructing a rotary press-fitting pile according to the present invention. FIG. 2 is a perspective view showing the entire construction apparatus for carrying out the first embodiment. FIG. 3 is a cross-sectional view showing a main part of the construction apparatus. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a sectional view taken along line VV in FIG.
　本発明の回転圧入杭の施工方法の第１実施形態を説明する前に、施工方法を実施するための回転圧入杭の施工装置について説明する。
　図１において符号１は回転圧入杭の施工装置である。この回転圧入杭の施工装置１は、先端に螺旋羽根Ｐａを備えた回転圧入杭Ｐを地盤に回転させながら圧入する（図３参照）。 Before explaining the first embodiment of the method for constructing a rotary press-fitting pile of the present invention, a construction device for a rotary press-fitting pile for carrying out the construction method will be described.
In FIG. 1, the code | symbol 1 is a construction apparatus of a rotary press-fit pile. This rotary press-in pile construction device 1 press-fits a rotary press-in pile P having a spiral blade Pa at its tip while rotating it into the ground (see FIG. 3).
　この実施形態では、海底地盤Ｇに回転圧入杭Ｐを回転圧入する場合の例を示す。ここでは、回転圧入杭の施工装置１は、施工船２に搭載されたクレーン３によってロープ４を介して海中に吊り下げられる。
　回転圧入杭の施工装置１は、図１及び図２に示すように、基盤１０と、基盤１０上の中央部に取り付けられ、回転圧入杭Ｐを海底地盤Ｇに回転圧入するための全旋回機（第１圧入装置）１１と、反力杭４５を海底地盤Ｇに回転圧入する反力杭回転圧入装置（第２圧入装置）１２とを備える。
　反力杭４５は、基盤１０を海底地盤Ｇの所定位置に固定するとともに、全旋回機１１により回転圧入杭Ｐを海底地盤Ｇに回転圧入するときにその反力を受ける。圧力杭回転圧入装置１２は、基盤１０の周辺部に複数個（例えば、全旋回機１１の周りに４個）、回転圧入杭Ｐを中心として周方向に９０度置きに取り付けられている。
　すなわち、この実施形態では、全旋回機１１と反力杭回転圧入装置１２とが共通の架台である基盤１０に取り付けられている。 In this embodiment, the example in the case of carrying out the rotary press-fit of the rotary press pile P to the seabed ground G is shown. Here, the rotary press-in pile construction apparatus 1 is suspended in the sea via a rope 4 by a crane 3 mounted on a construction ship 2.
As shown in FIG. 1 and FIG. 2, the rotary press-in pile construction device 1 is attached to the base 10 and the central portion on the base 10 and is an all-swivel machine for rotary press-fitting the rotary press-in pile P into the seabed ground G. (First press-fitting device) 11 and a reaction force pile rotary press-fitting device (second press-fitting device) 12 that rotationally presses the reaction force pile 45 into the seabed ground G.
The reaction force pile 45 receives the reaction force when the base 10 is fixed at a predetermined position of the seabed ground G and the rotary press-fit pile P is rotationally press-fitted into the seabed ground G by the all-swivel machine 11. A plurality of pressure pile rotary press-fitting devices 12 (for example, four around all the swirlers 11) are attached to the periphery of the base 10 and are attached every 90 degrees in the circumferential direction around the rotary press-fit pile P.
That is, in this embodiment, the all-swivel machine 11 and the reaction force pile rotary press-fitting device 12 are attached to the base 10 that is a common base.
　また、施工船２にはＧＰＳ装置１３が備えられ、施工船２の正確な位置が把握される。
また、回転圧入杭の施工装置１には位置情報を発信する位置情報発信器であるトランスポンダ１４が取り付けられている。トランスポンダ１４から発せられる信号は、施工船２に備えられた受信器であるレスポンダ１５によって受信される。これにより、施工船２に対する回転圧入杭の施工装置１の相対的な位置関係が把握され、前記施工船２に備えられたＧＰＳ装置１３による検出結果と相まって、回転圧入杭の施工装置１の正確な位置情報が把握できる。 Further, the construction ship 2 is provided with a GPS device 13 so that an accurate position of the construction ship 2 is grasped.
Moreover, the transponder 14 which is a position information transmitter which transmits position information is attached to the construction apparatus 1 of a rotary press-fit pile. A signal emitted from the transponder 14 is received by a responder 15 which is a receiver provided in the construction ship 2. Thereby, the relative positional relationship of the rotary press-in pile construction device 1 with respect to the construction ship 2 is grasped, and coupled with the detection result by the GPS device 13 provided in the construction boat 2, the accuracy of the rotary press-in pile construction device 1 Position information can be grasped.
　全旋回機１１について説明する。
　図３～図５に示すように、前記基盤１０は全旋回機１１のフレームを兼ねており、基盤１０の中央には回転圧入杭Ｐを挿通するための孔１０ａが形成されている。また、基盤１０にはフレームを兼ねる支柱２０が孔１０ａを中心としてその周りに４本それぞれ周方向に等間隔をあけて立設されている。
　支柱２０にはメインチャック２２を昇降自在に支持する昇降機構例えば油圧シリンダ２１が取り付けられている。これら油圧シリンダ２１の出力側基部２１Ａには、回転圧入杭Ｐを着脱可能に把持するメインチャック２２がベアリング２３を介して回転可能に取り付けられている。 The all-swivel machine 11 will be described.
As shown in FIGS. 3 to 5, the base 10 also serves as a frame of the all-swivel machine 11, and a hole 10 a for inserting the rotary press-fit pile P is formed at the center of the base 10. Further, four bases 20 serving as a frame are erected on the base 10 around the hole 10a at equal intervals in the circumferential direction.
An elevating mechanism for supporting the main chuck 22 so as to be movable up and down, for example, a hydraulic cylinder 21 is attached to the column 20. A main chuck 22 that detachably holds the rotary press-fit pile P is attached to the output side base 21 </ b> A of these hydraulic cylinders 21 via a bearing 23.
　メインチャック２２は、前記ベアリング２３を介して油圧シリンダ２１に回転可能に取り付けられたリング状の水平下板２４と、水平下板２４の上側に配置されたリング状の水平上板２５とを備える。
　水平上板２５は、油圧シリンダ２１の出力側基部２１Ａにチャックカラー昇降シリンダ２６を介して昇降可能に取り付けられた連結板２７に、ベアリング２８を介して回転可能に支持されている。
　水平下板２４の上側には円筒体２９が取り付けられている。円筒体２９の上部内周には、上方に向かうに従い漸次拡径するテーパー面２９ａが形成されている。
　一方、水平上板２５の下側には、複数のカラー支持ブロック３０が水平上板２５の中心から放射状に延びるように設けられている。つまり、複数の複数のカラー支持ブロック３０は、回転圧入杭Ｐが配置される位置を中心として放射状に配置されている。これらカラー支持ブロック３０は、それぞれリンク３１を介して水平上板２５に連結されている。このとき、カラー支持ブロック３０は、リンク３１の支持位置（水平上板２５とリンク３１との連結部分）の真下よりも、水平上板２５の中心側（回転圧入杭Ｐが配置される側）に位置するように、配置されている。しかも、カラー支持ブロック３０は、鉛直面に沿って回転可能に取り付けられている。つまり、カラー支持ブロック３０は、リンク３１を介して水平上板２５に連結されていることで、回転圧入杭Ｐに対して、該回転圧入杭Ｐの径方向に移動自在とされている。
　カラー支持ブロック３０の外側（回転圧入杭Ｐに対向する側とは反対側）は傾斜面３０ａとされている。この傾斜面３０ａは前記円筒体２９のテーパー面２９ａに対応している。また、カラー支持ブロック３０の内側（回転圧入杭Ｐに対向する側）にはメインチャックカラー３２がそれぞれ取り付けられている。各メインチャックカラー３２のさらに内側には、複数の高摩擦部材３２ａが上下方向に間隔をあけて取り付けられている。 The main chuck 22 includes a ring-shaped horizontal lower plate 24 rotatably attached to the hydraulic cylinder 21 via the bearing 23, and a ring-shaped horizontal upper plate 25 disposed on the upper side of the horizontal lower plate 24. .
The horizontal upper plate 25 is rotatably supported via a bearing 28 on a connecting plate 27 that is attached to an output side base 21A of the hydraulic cylinder 21 via a chuck collar elevating cylinder 26 so as to be movable up and down.
A cylindrical body 29 is attached to the upper side of the horizontal lower plate 24. A tapered surface 29a is formed on the inner periphery of the upper portion of the cylindrical body 29. The tapered surface 29a gradually increases in diameter toward the upper side.
On the other hand, a plurality of color support blocks 30 are provided below the horizontal upper plate 25 so as to extend radially from the center of the horizontal upper plate 25. That is, the plurality of collar support blocks 30 are arranged radially around the position where the rotary press-fit pile P is arranged. The collar support blocks 30 are connected to the horizontal upper plate 25 via links 31 respectively. At this time, the collar support block 30 is located on the center side of the horizontal upper plate 25 (the side where the rotary press-fit pile P is disposed) rather than just below the support position of the link 31 (the connecting portion between the horizontal upper plate 25 and the link 31). It is arranged to be located in. Moreover, the collar support block 30 is attached to be rotatable along the vertical plane. In other words, the collar support block 30 is connected to the horizontal upper plate 25 via the link 31 so that the collar support block 30 is movable in the radial direction of the rotary press-fit pile P with respect to the rotary press-fit pile P.
The outer side of the collar support block 30 (the side opposite to the side facing the rotary press-fit pile P) is an inclined surface 30a. The inclined surface 30 a corresponds to the tapered surface 29 a of the cylindrical body 29. Further, main chuck collars 32 are respectively attached to the inside of the collar support block 30 (side facing the rotary press-fit pile P). Inside the main chuck collars 32, a plurality of high friction members 32a are attached at intervals in the vertical direction.
　そして、このメインチャック２２では、チャックカラー昇降シリンダ２６が短縮するように操作されると、各カラー支持ブロック３０が円筒体２９に案内されてそれぞれ下降する。このとき、カラー支持ブロック３０の傾斜面３０ａが、円筒体２９のテーパー面２９ａに沿って下方にスライドし、同時に水平上板２５の径方向内方へ移動する。したがって、カラー支持ブロック３０に取り付けられているメインチャックカラー３２も、カラー支持ブロック３０と一体になって径方向内方へ移動し、基盤１０の中央に配置される回転圧入杭Ｐを、高摩擦部材３２ａを介して把持する。
　一方、チャックカラー昇降シリンダ２６が伸長するように操作されると、各カラー支持ブロック３０がそれぞれ上昇する。このとき、カラー支持ブロック３０の傾斜面３０ａが円筒体２９のテーパー面２９ａによる押圧から解除されるため、自重によって水平上板２５の径方向外方へ移動する。つまり、カラー支持ブロック３０が円筒体２９から徐々に上方に抜け出るので、円筒体２９から受ける径方向内方への押圧力が徐々に低下する。そのため、カラー支持ブロック３０は、自重によって径方向外方に移動する。したがって、カラー支持ブロック３０に取り付けられているメインチャックカラー３２も、カラー支持ブロック３０と一体になって径方向外方へ移動し、回転圧入杭Ｐへの把持を解除する。
　すなわち、メインチャック２２では、チャックカラー昇降シリンダ２６が短縮するように操作あるいは伸長するように操作されることによって、メインチャックカラー３２による回転圧入杭Ｐの把持及びその解除を行える。 In the main chuck 22, when the chuck collar elevating cylinder 26 is operated so as to be shortened, each collar support block 30 is guided by the cylindrical body 29 and lowered. At this time, the inclined surface 30 a of the collar support block 30 slides downward along the tapered surface 29 a of the cylindrical body 29 and simultaneously moves radially inward of the horizontal upper plate 25. Accordingly, the main chuck collar 32 attached to the collar support block 30 also moves inward in the radial direction together with the collar support block 30, and the rotary press-fitting pile P disposed at the center of the base 10 has a high friction. Grip through the member 32a.
On the other hand, when the chuck collar raising / lowering cylinder 26 is operated so as to extend, each collar support block 30 is raised. At this time, since the inclined surface 30a of the collar support block 30 is released from the pressing by the tapered surface 29a of the cylindrical body 29, it moves outward in the radial direction of the horizontal upper plate 25 by its own weight. That is, since the collar support block 30 gradually comes out from the cylindrical body 29, the radial inward pressing force received from the cylindrical body 29 gradually decreases. Therefore, the collar support block 30 moves radially outward by its own weight. Accordingly, the main chuck collar 32 attached to the collar support block 30 also moves radially outward together with the collar support block 30 to release the grip on the rotary press-fit pile P.
That is, in the main chuck 22, the rotary press-fit pile P can be gripped and released by the main chuck collar 32 by operating the chuck collar elevating cylinder 26 to be shortened or extended.
　なお、図３に示す例では、リンク３１によってカラー支持ブロック３０を、リンク３１の支持位置の真下よりも水平上板２５の中心側に位置するように支持しており、チャックカラー昇降シリンダ２６が伸長した際、カラー支持ブロック３０を自重によって水平上板２５の径方向外方へ移動するように構成している。但し、これに代わって、カラー支持ブロック３０を図示せぬバネによって水平上板２５の径方向外方へ移動するように付勢する構成にしてもよい。 In the example shown in FIG. 3, the collar 31 supports the collar support block 30 so as to be positioned closer to the center of the horizontal upper plate 25 than just below the support position of the link 31. When extended, the collar support block 30 is configured to move radially outward of the horizontal upper plate 25 by its own weight. However, instead of this, the collar support block 30 may be urged so as to move outward in the radial direction of the horizontal upper plate 25 by a spring (not shown).
　前記支柱２０等のフレームまたは油圧シリンダ２１と前記メインチャック２２との間には、回転圧入杭Ｐを把持した状態でメインチャック２２を回転させる回転機構３５が設けられている。回転機構３５は、例えば、フレームまたは油圧シリンダ２１に取り付けられた回転源であるモータと、このモータの回転力を伝える伝達系とを備え、この伝達系の出力部の回転が水平下板２４または水平上板２５に伝達される。 Between the frame such as the support column 20 or the hydraulic cylinder 21 and the main chuck 22, a rotation mechanism 35 that rotates the main chuck 22 while holding the rotary press-fit pile P is provided. The rotation mechanism 35 includes, for example, a motor that is a rotation source attached to the frame or the hydraulic cylinder 21, and a transmission system that transmits the rotational force of the motor, and the rotation of the output portion of the transmission system is the horizontal lower plate 24 or It is transmitted to the horizontal upper plate 25.
　メインチャック２２の上側には上部サブチャック４０が、またメインチャック２２の下側には下部サブチャック４１がそれぞれ配設されている。
　上部サブチャック４０は、油圧シリンダ２１の上端に、把持対象となる回転圧入杭Ｐが配置される位置を中心にそれぞれ放射状に取り付けられている。下部サブチャック４１は、フレームを構成する支柱２０に、把持対象となる回転圧入杭Ｐが配置される位置を中心にそれぞれ放射状に取り付けられている。
　上部サブチャック４０および下部サブチャック４１は、例えば、油圧シリンダまたはエアーシリンダにより構成される。
　また、上部サブチャック４０の内端、つまり把持対象となる回転圧入杭Ｐに対向する端部には、回転圧入杭Ｐを把持しながら同時に回転圧入杭Ｐの相対的な上下動を可能とするローラーが取り付けられている。 An upper sub chuck 40 is disposed above the main chuck 22, and a lower sub chuck 41 is disposed below the main chuck 22.
The upper sub-chuck 40 is attached radially to the upper end of the hydraulic cylinder 21 around the position where the rotary press-fit pile P to be grasped is disposed. The lower sub-chuck 41 is attached radially to each column 20 constituting the frame, centering on the position where the rotary press-fit pile P to be grasped is arranged.
The upper sub chuck 40 and the lower sub chuck 41 are constituted by, for example, a hydraulic cylinder or an air cylinder.
Further, at the inner end of the upper sub-chuck 40, that is, the end facing the rotary press-fit pile P to be gripped, the rotary press-fit pile P can be relatively moved up and down simultaneously while holding the rotary press-fit pile P. A roller is installed.
　前記反力杭回転圧入装置１２は、基本的に前記全旋回機１１とほぼ同様な構成とされている。全旋回機１１に対して反力杭回転圧入装置１２の異なる点は、上部サブチャック４０及び下部サブチャック４１を有しないこと、メインチャック２２、メインチャック２２を回転させる回転機構３５、メインチャック２２を昇降させる昇降機構がそれぞれ、前述した全旋回機１１のそれよりも小型であること、並びに、当該反力杭回転圧入装置１２によって回転圧入する対象が、先端に螺旋羽根４５ａを有する反力杭４５（小型の回転圧入杭）である点である。 The reaction force pile rotary press-fitting device 12 has basically the same configuration as the all-swivel machine 11. The difference of the reaction force pile rotary press-fitting device 12 with respect to the entire turning machine 11 is that the upper sub-chuck 40 and the lower sub-chuck 41 are not provided, the main chuck 22, the rotation mechanism 35 for rotating the main chuck 22, and the main chuck 22. The lifting mechanism that lifts and lowers each is smaller than that of the above-described all-swivel machine 11, and the reaction force pile having the spiral blade 45a at the tip is the object to be rotationally pressed by the reaction force pile rotation press-fitting device 12. 45 (small rotary press-fit pile).
　次に、上記構成の回転圧入杭の施工装置１を用いて海底地盤Ｇに回転圧入杭Ｐを回転圧入する回転圧入杭の施工方法について、図１並びに図６～図１５に基づき説明する。
　図１に示すように、回転圧入杭の施工装置１を施工船２に積み込んだ後、施工船２によって海上の所定位置まで運搬する。そして、施工船２が海上の所定位置まで到達すると、施工船２に搭載したクレーン３により回転圧入杭の施工装置１を、ロープ４を介して海底まで吊り降ろす。ここで、回転圧入杭の施工装置１に予め回転圧入杭Ｐを組みつけておく。
またこのとき、回転圧入杭Ｐの当該施工装置１への仮固定は、上部サブチャック４０及び下部サブチャック４１による把持、またはメインチャック２２による把持によって行なっても良く、さらにはそれら上部サブチャック４０及び下部サブチャック４１による把持とメインチャック２２による把持とを併用することにより行なっても良い。 Next, a rotary press-in pile construction method in which the rotary press-in pile P is rotationally press-fitted into the seabed ground G using the rotary press-in pile construction apparatus 1 having the above-described configuration will be described with reference to FIG. 1 and FIGS.
As shown in FIG. 1, after the rotary press-in pile construction device 1 is loaded on the construction ship 2, the construction ship 2 transports it to a predetermined position on the sea. When the construction ship 2 reaches a predetermined position on the sea, the crane 3 mounted on the construction ship 2 suspends the rotary press-in pile construction apparatus 1 to the seabed via the rope 4. Here, the rotary press-fit pile P is assembled in advance to the rotary press-fit pile construction device 1.
At this time, the rotary press-fit pile P may be temporarily fixed to the construction apparatus 1 by gripping by the upper sub-chuck 40 and the lower sub-chuck 41 or by gripping by the main chuck 22, and furthermore, the upper sub-chuck 40. Alternatively, the gripping by the lower sub-chuck 41 and the gripping by the main chuck 22 may be used in combination.
　ここで、施工船２の位置は、施工船２自体が風の影響を受ける関係上、正確に把握することが難しいものの、施工船２に搭載したＧＰＳ装置１３よってリアルタイムで正確に知ることができる。
　また、施工船２からロープ４を介して回転圧入杭の施工装置１を吊り下げた際に、潮流の影響を受けて回転圧入杭の施工装置１が水平方向へ移動する。しかしながら、施工船２に対する回転圧入杭の施工装置１の相対的な位置は、該回転圧入杭の施工装置１に取り付けたトランスポンダ１４から発信される位置信号を施工船２のレスポンダ１５によって受信することにより正確に知ることができる。
　したがって、回転圧入杭の施工装置１の位置、ひいてはこれから回転圧入しようとする回転圧入杭Ｐの位置は、これらＧＰＳ装置１３、トランスポンダ１４及びレスポンダ１５からなる位置把握システムによって正確に知ることができる。 Here, the position of the construction ship 2 can be accurately known in real time by the GPS device 13 mounted on the construction ship 2 although it is difficult to accurately grasp the construction ship 2 itself because of the influence of the wind. .
Further, when the rotary press-in pile construction device 1 is suspended from the construction ship 2 via the rope 4, the rotary press-in pile construction device 1 moves in the horizontal direction under the influence of the tidal current. However, the relative position of the rotary press-in pile construction device 1 with respect to the construction ship 2 is that the responder 15 of the construction boat 2 receives a position signal transmitted from the transponder 14 attached to the rotary press-in pile construction device 1. To know more accurately.
Therefore, the position of the rotary press-in pile construction apparatus 1 and, in turn, the position of the rotary press-in pile P to be rotary press-fitted in the future can be accurately known by the position grasping system including these GPS device 13, transponder 14 and responder 15.
　回転圧入杭の施工装置１が海底地盤Ｇに届いた時点で、該回転圧入杭の施工装置１の位置が所望位置であるか否かを判断する。判断した結果、回転圧入杭の施工装置１の位置が所望位置からずれている場合には、ロープ４を介して回転圧入杭の施工装置１を引き上げ、施工船２を移動させて、再度回転圧入杭の施工装置１の位置が所望位置になるように調整する。 When the rotary press-in pile construction device 1 reaches the seabed ground G, it is determined whether or not the position of the rotary press-in pile construction device 1 is a desired position. As a result of the determination, if the position of the rotary press-in pile construction device 1 is deviated from the desired position, the rotary press-in pile construction device 1 is pulled up via the rope 4, the construction ship 2 is moved, and the rotary press-in again. It adjusts so that the position of the construction apparatus 1 of a pile may become a desired position.
　そして、回転圧入杭の施工装置１の位置が海底地盤Ｇ上の所望位置に至った時点で、回転圧入杭の施工装置１を海底地盤Ｇに定着する。
　図６～図８は本発明の実施形態の基盤の定着方法を示す工程説明図である。
　図６、図７に示すように、まず、反力杭回転圧入装置１２によってそれぞれの反力杭４５を海底地盤Ｇ中に回転圧入する（反力杭回転圧入工程）。反力杭４５の回転圧入については、後述する全旋回機１１を使用した方法とほぼ同様であり、ここではその説明を省略する。
　なお、反力杭４５を回転する際に発生する回転反力は、自重を利用して抑えてもよいが、例えば反力杭４５同士の回転方向を互いに逆方向にすることによって相殺する。
　ここで、海底地盤Ｇの表面が図６、図７に示すように斜めに傾斜している場合には、反力杭４５を海底地盤Ｇ中に所定深さまで回転圧入する。その後、基盤１０に予め搭載された水準器から発せられる傾斜情報に基づき、反力杭回転圧入装置１２に組み込まれた昇降機構によって、基盤１０に対する反力杭４５の個々の相対的な高さ位置（深さ位置）を調整する。
これにより、図８に示すように基盤１０が水平面に沿うように、基盤１０の傾きを調整する（共通の架台傾き調整工程）。この調整は、施工船２からの遠隔操作によって行なう。 Then, when the position of the rotary press-in pile construction device 1 reaches a desired position on the seabed ground G, the rotary press-in pile construction device 1 is fixed to the seabed ground G.
6 to 8 are process explanatory views showing the fixing method of the substrate according to the embodiment of the present invention.
As shown in FIGS. 6 and 7, first, each reaction force pile 45 is rotationally pressed into the seabed ground G by the reaction force pile rotation press-fitting device 12 (reaction force pile rotation press-fitting step). The rotational press-fitting of the reaction force pile 45 is substantially the same as the method using the all-swivel machine 11 described later, and the description thereof is omitted here.
Note that the rotational reaction force generated when the reaction force pile 45 is rotated may be suppressed by using its own weight, but is canceled by, for example, reversing the rotation directions of the reaction force piles 45.
Here, when the surface of the seabed ground G is inclined obliquely as shown in FIGS. 6 and 7, the reaction force pile 45 is rotationally press-fitted into the seabed ground G to a predetermined depth. Then, based on the inclination information emitted from the level mounted in advance on the base 10, the individual relative height positions of the reaction force pile 45 with respect to the base 10 by the lifting mechanism incorporated in the reaction force pile rotary press-fitting device 12. Adjust (depth position).
Thereby, as shown in FIG. 8, the inclination of the base | substrate 10 is adjusted so that the base | substrate 10 may follow a horizontal surface (common gantry inclination adjustment process). This adjustment is performed by remote control from the construction ship 2.
　図９は本発明の実施形態の回転圧入杭の施工装置を用いた回転圧入杭の施工方法を示す工程図である。図１０～図１５は、回転圧入杭の施工方法の詳細を示す工程説明図である。
　反力杭回転圧入装置１２による基盤１０の定着並びに基盤１０の姿勢調整が完了した後、図９に示すように、全旋回機１１を用いて回転圧入杭Ｐを海底地盤Ｇに回転圧入する。
　具体的には、図１０に示すように、まず、チャックカラー昇降シリンダ２６を短縮するように操作し、円筒体２９のテーパー面２９ａを介してカラー支持ブロック３０を水平上板２５の中心側、すなわち、回転圧入杭Ｐへ接近するように移動させる。これによって、最終的に、メインチャック２２は、メインチャックカラー３２及び高摩擦部材３２ａを介して回転圧入杭Ｐを把持する。 FIG. 9 is a process diagram showing a method for constructing a rotary press-fitting pile using the rotary press-fitting pile construction device of the embodiment of the present invention. 10 to 15 are process explanatory views showing details of the method for constructing the rotary press-fit pile.
After the fixing of the base 10 and the attitude adjustment of the base 10 by the reaction force pile rotary press-fitting device 12 are completed, the rotary press-pile P is rotationally press-fitted into the seabed ground G using the all-swivel machine 11 as shown in FIG.
Specifically, as shown in FIG. 10, first, the chuck collar elevating cylinder 26 is operated to be shortened, and the collar support block 30 is moved to the center side of the horizontal upper plate 25 via the tapered surface 29 a of the cylindrical body 29. That is, it is moved so as to approach the rotary press-fit pile P. As a result, the main chuck 22 finally holds the rotary press-fitting pile P via the main chuck collar 32 and the high friction member 32a.
　このように、メインチャック２２により回転圧入杭Ｐを把持した後、上部サブチャック４０及び下部サブチャック４１による回転圧入杭Ｐの把持を解除する。そして、図１１に示すように、予め伸長状態にあった油圧シリンダ２１を短縮するように操作して回転圧入杭Ｐに下方への押圧力を与えるとともに、回転機構３５（図３参照）によりメインチャック２２を所定方向へ回転させる。すると、回転圧入杭Ｐの先端に取り付けた螺旋羽根Ｐａが下方へ押圧されながら所定方向へ回転される。これにより、ネジ作用によって、回転圧入杭Ｐが海底地盤Ｇ中を下方へ回転圧入される（回転圧入杭回転圧入工程）。
　このとき、基盤１０には回転圧入杭Ｐを回転圧入するときの反力（回転反力および上方への押圧反力）が加わるが、反力杭回転圧入装置１２によって既に海底地盤Ｇに回転圧入された反力杭４５がその反力に対抗する。つまり、反力杭４５によって、基盤１０が海底地盤Ｇに定着されているので、上方への押圧反力によって基盤１０が海底地盤Ｇから離間するのを、また、回転反力によって基盤１０が回転圧入杭Ｐの回転と逆方向へ回転するのをそれぞれ防止できる。 As described above, after the rotary press-fit pile P is gripped by the main chuck 22, the grip of the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released. Then, as shown in FIG. 11, the hydraulic cylinder 21 that has been in an extended state is operated to be shortened to apply a downward pressing force to the rotary press-fit pile P, and the rotation mechanism 35 (see FIG. 3) The chuck 22 is rotated in a predetermined direction. Then, the spiral blade Pa attached to the tip of the rotary press-fit pile P is rotated in a predetermined direction while being pressed downward. Thereby, the rotary press-fit pile P is rotationally press-fitted downward in the seabed ground G by a screw action (rotary press-fit pile rotary press-in process).
At this time, reaction force (rotation reaction force and pressing reaction force upward) when the rotary press-fit pile P is rotary press-fitted is applied to the base 10, but the reaction force pile rotary press-fitting device 12 has already been rotary press-fitted into the seabed ground G. The made reaction force pile 45 opposes the reaction force. That is, since the base 10 is fixed to the seabed ground G by the reaction force pile 45, the base 10 is separated from the seabed ground G by the upward pressing reaction force, and the base 10 is rotated by the rotational reaction force. Each of the press-in piles P can be prevented from rotating in the opposite direction.
　そして、油圧シリンダ２１が短縮限界位置に達すると、油圧シリンダ２１を短縮させる操作を停止させると同時に、前記回転機構３５によるメインチャック２２の回転を停止させる。その後、図１２に示すように、上部サブチャック４０及び下部サブチャック４１を駆動させて回転圧入杭Ｐを把持させる。この状態で、図１３に示すように、チャックカラー昇降シリンダ２６を伸長させるように操作し、メインチャック２２による回転圧入杭Ｐの把持を解除する。 When the hydraulic cylinder 21 reaches the shortening limit position, the operation of shortening the hydraulic cylinder 21 is stopped, and at the same time, the rotation of the main chuck 22 by the rotating mechanism 35 is stopped. Thereafter, as shown in FIG. 12, the upper sub-chuck 40 and the lower sub-chuck 41 are driven to grip the rotary press-fit pile P. In this state, as shown in FIG. 13, the chuck collar elevating cylinder 26 is operated to be extended, and the gripping of the rotary press-fit pile P by the main chuck 22 is released.
　次いで、図１４に示すように、油圧シリンダ２１を伸長させるように操作し、回転圧入杭Ｐの把持を解除したメインチャック２２を上昇させる。
　このとき、上部サブチャック４０を油圧シリンダ２１の出力側に取り付けている関係上、上部サブチャック４０もメインチャック２２と一体的に上昇する。ここで、上部サブチャック４０の先端の回転圧入杭Ｐに当接する部分にローラーを取り付けている。従って、上部サブチャック４０の先端は、ローラーを介して回転圧入杭Ｐの外周面上を転がりながら、当該回転圧入杭Ｐを把持している。つまり、上部サブチャック４０は、回転圧入杭Ｐに対し、当接位置を変えながら回転圧入杭Ｐを把持することができる。 Next, as shown in FIG. 14, the operation is performed to extend the hydraulic cylinder 21, and the main chuck 22 released from the gripping of the rotary press-fit pile P is raised.
At this time, the upper sub chuck 40 is also raised integrally with the main chuck 22 because the upper sub chuck 40 is attached to the output side of the hydraulic cylinder 21. Here, the roller is attached to the part which contact | abuts the rotation press fit pile P of the front-end | tip of the upper subchuck 40. FIG. Accordingly, the tip of the upper sub-chuck 40 holds the rotary press-fit pile P while rolling on the outer peripheral surface of the rotary press-fit pile P via the roller. That is, the upper sub-chuck 40 can grip the rotary press-fit pile P while changing the contact position with respect to the rotary press-fit pile P.
　メインチャック２２を上方限界位置まで移動させた後、油圧シリンダ２１を停止させる。そして、図１５に示すように、上部サブチャック４０及び下部サブチャック４１による回転圧入杭Ｐの把持を継続したまま、チャックカラー昇降シリンダ２６を短縮させるように操作し、メインチャック２２による回転圧入杭Ｐの把持を行なう。そして、メインチャック２２による把持が完了すると、上部サブチャック４０及び下部サブチャック４１による回転圧入杭Ｐの把持を解除する（盛り替え工程）。
　以下、図１０、図１１に示す回転圧入杭回転圧入工程と、図１２～図１５に示す盛り替え工程を繰り返し行うことにより、回転圧入杭Ｐを海底地盤Ｇの所定深さまで到達させることができる。 After moving the main chuck 22 to the upper limit position, the hydraulic cylinder 21 is stopped. Then, as shown in FIG. 15, while continuing to hold the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41, the chuck collar lifting cylinder 26 is operated to be shortened, and the rotary press-fit pile by the main chuck 22 is operated. Hold P. When the gripping by the main chuck 22 is completed, the gripping of the rotary press-fit pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released (refilling step).
Thereafter, the rotary press-in pile P can be reached to a predetermined depth of the seabed ground G by repeatedly performing the rotary press-in pile rotary press-in process shown in FIGS. 10 and 11 and the refilling process shown in FIGS. .
　ここで、メインチャック２２による回転圧入杭Ｐの把持位置を変えるときつまり盛り替えのときに、メインチャック２２の上側及び下側にそれぞれ配置した上部サブチャック４０と下部サブチャック４１により回転圧入杭Ｐを把持させるので、回転圧入杭Ｐの芯が回転圧入杭の施工装置１に対してずれることがない。つまり、施工場所が海底地盤Ｇあるいは湖底地盤のときであって、潮流や水流の影響を受ける場合や、回転圧入杭Ｐを斜めに傾斜した状態で回転圧入するときであって、回転圧入杭Ｐに自重による傾斜モーメントが作用する場合であっても、回転圧入杭Ｐの芯が該施工装置１の芯からずれるのを防止することができる。
　また、クレーンを用いることなく回転圧入杭Ｐの回転圧入が行なえるので、従来行なわれたような、施工後に回転圧入杭Ｐからシャックルを取り外す手間も不要になる。 Here, when the holding position of the rotary press-fit pile P by the main chuck 22 is changed, that is, when refilling, the rotary press-fit pile P is placed by the upper sub-chuck 40 and the lower sub-chuck 41 respectively arranged on the upper side and the lower side of the main chuck 22. Therefore, the core of the rotary press-fit pile P does not shift with respect to the construction device 1 of the rotary press-fit pile. In other words, when the construction site is the seabed ground G or the lakebed ground, when it is affected by tidal currents or water flow, or when the rotary press-in pile P is rotationally press-fitted in an inclined state, the rotary press-in pile P Even when a tilting moment due to its own weight acts on the core, the core of the rotary press-fit pile P can be prevented from being displaced from the core of the construction device 1.
Further, since the rotary press-fitting of the rotary press-fit pile P can be performed without using a crane, there is no need to remove the shackle from the rotary press-fit pile P after construction, as is done conventionally.
〈第２実施形態〉
　以下、本発明の第２実施形態を図１６～図２０を参照して説明する。なお、第２実施形態では、第１実施形態における構成要素と同一の部分については、同一の符号を付しその説明を省略する。
　前記第１実施形態では、回転圧入杭回転圧入である全旋回機１１と反力杭回転圧入装置１２とを共通の架台である基盤１０に取り付けていたが、この第２実施形態では、全旋回機１１と反力杭回転圧入装置１２とをそれぞれ別々の架台に取り付け、それら架台を反力伝達バーで連結している。
　すなわち、第２実施形態では、図１８Ａに示すように、全旋回機１１を第１の架台５１に取り付け、反力杭回転圧入装置１２を第２の架台５２に取り付け、第１の架台５１と第２の架台５２とを反力伝達バー５３で連結している。 Second Embodiment
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In the first embodiment, the entire swivel machine 11 and the reaction force pile rotation press-fitting device 12 that are rotary press-fitting pile rotary press-fits are attached to the base 10 that is a common gantry. The machine 11 and the reaction force pile rotary press-fitting device 12 are each attached to separate platforms, and these platforms are connected by a reaction force transmission bar.
That is, in 2nd Embodiment, as shown to FIG. 18A, the whole turning machine 11 is attached to the 1st mount 51, the reaction force pile rotation press-fitting apparatus 12 is attached to the 2nd mount 52, and the 1st mount 51 and The second mount 52 is connected by a reaction force transmission bar 53.
　具体的な施工方法について説明すると、図１６に示すように、まず、反力杭４５が予め組み込まれた反力杭回転圧入装置１２を備える第２の架台５２を、施工船によって運搬し、クレーンから延びるロープにより海底地盤Ｇ上の所定位置に吊り降ろす。第２の架台５２の下面には、下端が尖って海底地盤Ｇに突き刺さるスパイク部材５４が複数取り付けられている。また、第２の架台５２の上面には、反力杭回転圧入装置１２の他に、この反力杭回転圧入装置１２の周りに複数個（例えば２個）一組のガイドピン５５が複数組周方向９０度置きに取り付けられている。なお、第２の架台５２には、当該第２の架台５２の位置情報を発信するトランスポンダ（図示略）がセットされている。 A specific construction method will be described. As shown in FIG. 16, first, the second gantry 52 including the reaction force pile rotation press-fitting device 12 in which the reaction force pile 45 is incorporated in advance is transported by a construction ship, and a crane is installed. Is suspended at a predetermined position on the seabed G by a rope extending from the bottom. A plurality of spike members 54 are attached to the lower surface of the second gantry 52 so that the lower ends are sharp and pierce the seabed ground G. In addition to the reaction force pile rotation press-fitting device 12, a plurality of (for example, two) guide pins 55 around the reaction force pile rotation press-fitting device 12 are provided on the upper surface of the second mount 52. It is attached every 90 degrees in the circumferential direction. Note that a transponder (not shown) for transmitting position information of the second gantry 52 is set on the second gantry 52.
　前述したように第２の架台５２を海底地盤Ｇ上の所定位置に吊り降ろした後、図１７に示すように、該第２の架台５２上の反力杭回転圧入装置１２を用いて反力杭４５を、把持機構により把持した状態で昇降機構により下方へ押圧しながら回転機構により回転させて、海底地盤Ｇに回転圧入する。このときの回転反力はスパイク部材５４を利用して抑え、上方への押圧反力は第２の架台５２及び反力杭回転圧入装置１２の自重を利用して抑える。
　海底地盤Ｇの所定深さまで、反力杭４５を回転圧入させた後、図１８Ａに示すように、回転圧入杭Ｐが予め組み込まれた全旋回機１１を備える第１の架台５１を、クレーンから延びるロープにより海底地盤Ｇ上の所定位置に吊り降ろす。 As described above, after the second gantry 52 is suspended at a predetermined position on the seabed ground G, the reaction force is applied using the reaction force pile rotary press-fitting device 12 on the second gantry 52 as shown in FIG. The pile 45 is rotated and press-fitted into the seabed ground G by being rotated by the rotating mechanism while being pressed downward by the lifting mechanism while being held by the holding mechanism. The rotational reaction force at this time is suppressed using the spike member 54, and the upward pressing reaction force is suppressed using the weight of the second gantry 52 and the reaction force pile rotation press-fitting device 12.
After the reaction force pile 45 is rotationally press-fitted to a predetermined depth of the seabed ground G, as shown in FIG. 18A, the first gantry 51 including the entire turning machine 11 in which the rotary press-fitting pile P is incorporated in advance is removed from the crane. It is suspended at a predetermined position on the seabed ground G by the extending rope.
　このとき、全旋回機１１の側部からは反力伝達バー５３が延びている。図１８Ｂに示すように、反力伝達バー５３の先端拡径部には、複数（例えば２個）のピン孔５３ａが反力伝達バー５３の長手方向に直交するように並んで形成されている。
　ここでは、複数のピン孔５３ａに第２の架台５２のガイドピン５５がそれぞれ挿入するように、前記第１の架台５１を海底地盤Ｇ上に位置決めしながら吊り降ろす（連結工程・ピン挿入嵌合工程）。なお、このときの位置決めは、例えば、反力伝達バー５３の先端に設けた図示せぬカメラにより、ガイドピン５５のピン孔５３ａへの挿入状況を監視しながら行なう。 At this time, the reaction force transmission bar 53 extends from the side portion of the entire turning machine 11. As shown in FIG. 18B, a plurality of (for example, two) pin holes 53 a are formed in the tip diameter enlarged portion of the reaction force transmission bar 53 so as to be orthogonal to the longitudinal direction of the reaction force transmission bar 53. .
Here, the first mount 51 is suspended while being positioned on the seabed ground G so that the guide pins 55 of the second mount 52 are respectively inserted into the plurality of pin holes 53a (connection process / pin insertion fitting). Process). The positioning at this time is performed, for example, by monitoring the insertion state of the guide pin 55 into the pin hole 53a by a camera (not shown) provided at the tip of the reaction force transmission bar 53.
　なお、図１８Ａに示すように、反力伝達バー５３には、当該反力伝達バー５３自身の長さを調整する長さ調整手段５６、並びに反力伝達バー５３の基端側に対する先端（先端拡径部）の角度を調整する回転手段５７がそれぞれ取り付けられている。また、全旋回機１１の反力伝達バー５３が取り付けられている側とは逆側の側部にはカウンタ５８が取り付けられている。 As shown in FIG. 18A, the reaction force transmission bar 53 includes a length adjusting means 56 that adjusts the length of the reaction force transmission bar 53 itself, and a distal end (tip end) of the reaction force transmission bar 53 with respect to the proximal end side. Rotating means 57 for adjusting the angle of the (expanded portion) are respectively attached. Further, a counter 58 is attached to a side portion of the entire turning machine 11 opposite to the side where the reaction force transmission bar 53 is attached.
　上記のように第１の架台５１を海底地盤Ｇ上に吊り下ろした後、図１９に示すように、第１の架台５１の下面に取り付けた複数のジャッキ５９のそれぞれの長さを調整することにより、第１の架台５１の傾きを例えば水平面に沿うように調整する（第１の架台傾き調整工程）。
　第１の架台５１の傾き調整が終了した後、前記第１実施形態で説明したように、回転圧入杭Ｐを、全旋回機１１を用いて海底地盤Ｇに回転圧入する（図２０参照）。
　このとき、図１８Ａに示すように、回転圧入杭Ｐを海底地盤Ｇに回転圧入する際の反力（回転反力）は、第２の架台５２に取り付けた反力杭４５の定着力によって反力伝達バー５３を介して得ている。つまり、回転圧入杭Ｐを海底地盤Ｇに回転圧入する際に生じた回転反力は、反力伝達バー５３を介して反力杭４５に伝わるが、反力杭４５は既に海底地盤Ｇに定着しているので、回転反力に対抗することができる。
　ここで、第１の架台５１と第２の架台５２との離間距離が長くなればなるほど、反力杭４５に作用する回転反力は小さくなる。このため、第１の架台５１と第２の架台５２との離間距離を適宜設定することで、反力杭４５の小型化や反力杭４５の海底地盤Ｇへの侵入深さを浅くすることができ、しかも、反力杭４５の本数を少なくできる。例えば、第２実施形態のように、第２の架台５２によって取り付ける反力杭４５の本数を１本とすることができる。勿論、反力杭４５を２本以上としても良い。 After the first gantry 51 is suspended on the seabed ground G as described above, the lengths of the plurality of jacks 59 attached to the lower surface of the first gantry 51 are adjusted as shown in FIG. Thus, the inclination of the first gantry 51 is adjusted, for example, along a horizontal plane (first gantry inclination adjusting step).
After the tilt adjustment of the first gantry 51 is completed, the rotary press-fitting pile P is rotary press-fitted into the seabed ground G using the all-swivel machine 11 as described in the first embodiment (see FIG. 20).
At this time, as shown in FIG. 18A, the reaction force (rotational reaction force) when the rotary press-fit pile P is press-fitted into the seabed ground G is counteracted by the fixing force of the reaction force pile 45 attached to the second mount 52. It is obtained via the force transmission bar 53. That is, the rotational reaction force generated when the rotary press-fit pile P is rotationally press-fitted into the seabed ground G is transmitted to the reaction force pile 45 through the reaction force transmission bar 53, but the reaction force pile 45 has already settled on the seabed ground G. Therefore, it can counter the rotational reaction force.
Here, the longer the distance between the first frame 51 and the second frame 52, the smaller the rotational reaction force acting on the reaction force pile 45. For this reason, by setting the separation distance between the first mount 51 and the second mount 52 as appropriate, the reaction force pile 45 can be reduced in size and the reaction force pile 45 can be penetrated into the seabed G. In addition, the number of reaction force piles 45 can be reduced. For example, as in the second embodiment, the number of reaction force piles 45 attached by the second mount 52 can be one. Of course, two or more reaction force piles 45 may be used.
　以上、本発明の各実施形態について図面を参照して詳述したが、具体的な構成はこれらの実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等も含まれる。
　例えば、前記実施形態では、回転圧入杭の施工装置１を用いて海底に回転圧入杭Ｐを回転圧入する例を示したが、これに限られることなく、陸上の地盤に回転圧入杭Ｐを回転圧入する場合でも本発明は適用可能である。
　また、前記実施形態では、共通の基盤１０あるいは第１の架台５１を水平面に沿うように、それら架台の傾きを調整しているが、これに限られることなく、傾斜地盤に対して、その地盤に直交するように（地盤に対して平行となるように）架台の傾きを調整しても良い。
　また、前記第２実施形態では、第２の架台５２の上面にガイドピン５５を植設するとともに、全旋回機１１から延びる反力伝達バー５３の先端にピン孔５３ａを設け、ガイドピン５５をピン孔５３ａに挿入させる構成としているが、これに限られることはない。例えば、ガイドピン５５に代わり例えば平面視多角形状（例えば６角形状）の棒を設けるとともに、ピン孔の代わりに多角形状（例えば６角形状）の嵌合穴を設け、これらを嵌合する構成にしてもよい。
　また、前記第２実施形態では、一つの全旋回機１１に対して反力杭４５を有する反力杭回転圧入装置１２を一つ設けているが、これに限られることはない。例えば、一つの全旋回機１１に対して反力杭４５を有する反力杭回転圧入装置１２を複数設けても良い。 As mentioned above, although each embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to these embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included. .
For example, in the above-described embodiment, an example in which the rotary press-in pile P is rotationally press-fitted into the sea floor using the rotary press-in pile construction device 1 has been described. The present invention is applicable even when press-fitting.
Moreover, in the said embodiment, although the inclination of these mounts is adjusted so that the common base | substrate 10 or the 1st mount 51 may follow a horizontal surface, it is not restricted to this, The ground with respect to an inclined ground The tilt of the gantry may be adjusted so as to be orthogonal to the ground (so as to be parallel to the ground).
In the second embodiment, the guide pin 55 is planted on the upper surface of the second gantry 52, and the pin hole 53 a is provided at the tip of the reaction force transmission bar 53 extending from the all-swivel machine 11. Although it is set as the structure inserted in the pin hole 53a, it is not restricted to this. For example, a polygonal (for example, hexagonal) rod in plan view is provided in place of the guide pin 55, and a polygonal (for example, hexagonal) fitting hole is provided in place of the pin hole, and these are fitted. It may be.
Moreover, in the said 2nd Embodiment, although one reaction force pile rotation press-fit apparatus 12 which has the reaction force pile 45 is provided with respect to one all the turning machine 11, it is not restricted to this. For example, a plurality of reaction force pile rotary press-fitting devices 12 having reaction force piles 45 may be provided for one all-swivel machine 11.
　本発明によれば、小型の反力杭の地盤への定着力を利用することによって、回転圧入杭を地盤に回転圧入する際の回転反力及び上方への押圧反力に対抗することができる。このため、たとえ、施工場所が海底地盤あるいは湖底地盤であって、水による浮力を受けるため装置の自重等を反力に対抗するための対抗力として利用しにくい場合であっても、回転圧入杭を地盤に回転圧入することができる。従って、産業上の利用可能性を有する。 According to the present invention, by utilizing the fixing force of the small reaction force pile to the ground, it is possible to counter the rotational reaction force and the upward pressing reaction force when the rotary press-fitting pile is rotationally press-fitted into the ground. . For this reason, even if the construction site is submarine ground or lake bottom ground, and it is difficult to use it as a counter force to counteract the self-weight of the device against the reaction force because it receives buoyancy due to water, the rotary press pile Can be press-fitted into the ground. Therefore, it has industrial applicability.
　１　回転圧入杭の施工装置　２　施工船　３　クレーン　４　ロープ　　１０　基盤（共通の架台）　１０ａ　孔　１１　全旋回機（回転圧入杭回転圧入装置）　１２　反力杭回転圧入装置　１３　ＧＰＳ装置　１４　トランスポンダ（位置情報発信器）　１５　レスポンダ（受信器）　２０　支柱　２１　油圧シリンダ（昇降機構）　２２　メインチャック（把持装置）　２４　水平下板　２５　水平上板　２６　チャックカラー昇降シリンダ　３０　カラー支持ブロック　３２　メインチャックカラー　３５　回転機構　４０　上部サブチャック　４１　下部サブチャック　４５　反力杭　４５ａ　螺旋羽根　５１　第１の架台　５２　第２の架台　５３　反力伝達バー　５３ａ　ピン孔　５４　スパイク部材　５５　ガイドピン（ピン）　５８　カウンタ　Ｐ　回転圧入杭　Ｐａ　螺旋羽根　Ｇ　海底地盤 1 Rotary press-fit pile construction device 2 Construction ship 3 Crane 4 Rope 10 Base (common mount) 10a hole 11 All-swivel machine (Rotary press-fit pile rotary press-fit device) 12 Reaction force pile rotary press-fit device 13 GPS device 14 Transponder (position information) Transmitter) 15 Responder (receiver) 20 Strut 21 Hydraulic cylinder (lifting mechanism) 22 Main chuck (gripping device) 24 Horizontal lower plate 25 Horizontal upper plate 26 Chuck collar lifting cylinder 30 Color support block 32 Main chuck collar 35 Rotating mechanism 40 Upper sub-chuck 41 Lower sub-chuck 45 Reaction force pile 45a Spiral blade 51 First frame 52 Second frame 53 Reaction force transmission bar 53a Pin hole 54 Spike member 55 Guide pin (Pi ) 58 counter P rotation press pile Pa spiral blade G Seabed

Claims (8)

  1. 　先端に螺旋羽根を有する回転圧入杭を下方へ押圧しながら回転させることにより、該回転圧入杭を地盤に回転圧入する工程と、
    　先端に螺旋羽根を有し、前記回転圧入杭よりも小型の反力杭を地盤に回転圧入する工程と、を備え、
    　前記回転圧入杭を地盤に回転圧入する際に生じる回転反力及び上方への押圧反力を、先に施工された前記反力杭に負担させる、回転圧入杭の施工方法。     Rotating the press-fitting pile having a spiral blade at the tip while pressing the rotary press-down downward, and rotating the press-fitting pile into the ground;
    Having a spiral blade at the tip, and rotationally press-fitting a reaction force pile smaller than the rotary press-fit pile into the ground,
    The construction method of the rotation press pile which makes the said reaction force pile constructed previously bear the rotation reaction force and the pressing reaction force which generate | occur | produce when rotating the press fit pile in the ground.
  2. 　前記回転圧入杭を地盤に回転圧入する第１圧入装置と、前記反力杭を地盤に回転圧入する第２圧入装置とが、共通の架台に取り付けられている、請求項１記載の回転圧入杭の施工方法。 The rotary press-fitting pile according to claim 1, wherein the first press-fitting device for press-fitting the rotary press-fitting pile into the ground and the second press-fitting device for rotary press-fitting the reaction force pile into the ground are attached to a common mount. Construction method.
  3. 　前記第２圧入装置が、前記第１圧入装置を中心としてその周りに複数個取り付けられている、請求項２記載の回転圧入杭の施工方法。 The method for constructing a rotary press-fitting pile according to claim 2, wherein a plurality of the second press-fitting devices are attached around the first press-fitting device.
  4. 　前記共通の架台に対する前記反力杭の相対的な高さ位置を個々に変えることによって、前記共通の架台の傾きを調整する工程をさらに備える、請求項３に記載の回転圧入杭の施工方法。 The construction method of the rotary press-fit pile according to claim 3, further comprising a step of adjusting an inclination of the common mount by individually changing a relative height position of the reaction force pile with respect to the common mount.
  5. 　前記共通の架台を水上の所定位置まで運搬する施工船の絶対的な位置をＧＰＳ装置で測定する工程と、
    　前記施工船から、位置情報発信器が取り付けられた前記共通の架台を水底の地盤まで吊り下げる工程と、
    　前記位置情報発信器から発せられる信号を前記施工船に取り付けた受信器で受信することにより、前記施工船に対する前記共通の架台の相対的な位置を測定する工程と、
    　前記施工船の絶対的な位置と、前記施工船に対する前記共通の架台の相対的な位置とに基づいて、前記共通の架台の絶対的な位置を測定する工程と、
    　をさらに備える、請求項２～４のいずれか一項に記載の回転圧入杭の施工方法。     Measuring the absolute position of the construction ship carrying the common platform to a predetermined position on the water with a GPS device;
    From the construction ship, a process of suspending the common mount on which the position information transmitter is attached to the bottom of the waterbed,
    Measuring a relative position of the common mount with respect to the construction ship by receiving a signal emitted from the position information transmitter by a receiver attached to the construction ship;
    Measuring the absolute position of the common platform based on the absolute position of the construction vessel and the relative position of the common platform with respect to the construction vessel;
    The method for constructing the rotary press-fit pile according to any one of claims 2 to 4, further comprising:
  6. 　前記第１圧入装置を取り付けた第１の架台と、前記第２圧入装置を取り付けた第２の架台と、を反力伝達バーで連結する連結工程をさらに備える、請求項２に記載の回転圧入杭の施工方法。 The rotary press-fitting according to claim 2, further comprising a connecting step of connecting the first gantry to which the first press-fitting device is attached and the second gantry to which the second press-fitting device is attached with a reaction force transmission bar. Pile construction method.
  7. 　前記連結工程は、
    　前記第１の架台から延長するように設けた前記反力伝達バーの先端に複数のピン孔を形成する工程と、
    　前記複数のピン孔に、前記第２の架台に植設した複数のピンをそれぞれ挿入して嵌合させる工程と、
    　をさらに備える、請求項６に記載の回転圧入杭の施工方法。     The connecting step includes
    Forming a plurality of pin holes at the tip of the reaction force transmission bar provided to extend from the first frame;
    Inserting and fitting a plurality of pins implanted in the second frame into the plurality of pin holes, and
    The construction method of the rotary press-fit pile of Claim 6 further equipped with these.
  8. 　前記第１の架台に設けた複数のジャッキによって該第１の架台の傾きを調整する工程をさらに備える、請求項６または７に記載の回転圧入杭の施工方法。 The method for constructing a rotary press-fit pile according to claim 6 or 7, further comprising a step of adjusting the inclination of the first mount using a plurality of jacks provided on the first mount.
PCT/JP2013/081373 2012-12-28 2013-11-21 Method for applying rotary press-in pile WO2014103575A1 (en)

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