WO2014103576A1 - Construction method and construction device for rotary press-in pile - Google Patents

Construction method and construction device for rotary press-in pile Download PDF

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Publication number
WO2014103576A1
WO2014103576A1 PCT/JP2013/081376 JP2013081376W WO2014103576A1 WO 2014103576 A1 WO2014103576 A1 WO 2014103576A1 JP 2013081376 W JP2013081376 W JP 2013081376W WO 2014103576 A1 WO2014103576 A1 WO 2014103576A1
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WIPO (PCT)
Prior art keywords
rotary press
pile
chuck
fit
construction
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PCT/JP2013/081376
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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 WO2014103576A1 publication Critical patent/WO2014103576A1/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 rotary press-in pile construction device and a construction method in which a rotary press-fit pile having a spiral blade at the tip is press-fitted while rotating into the ground.
  • This rotary press-in pile construction device has a gripping mechanism that detachably holds the rotary press-fit pile, a rotary mechanism that rotates the gripping mechanism while gripping the rotary press-fit pile, and a propulsive force to the rotary press-fit pile. And a lifting mechanism that supports the gripping mechanism so as to be movable up and down.
  • the length of the rotary press-fit pile can be determined by rotating the gripping mechanism with the rotary mechanism while holding the rotary press-fit pile with the gripping mechanism and lowering the gripping mechanism with the lifting mechanism.
  • the rotary press-fit pile can be rotationally press-fitted into the ground by repeating each predetermined length while changing the gripping position on the rotary press-fit pile by the gripping mechanism along the direction.
  • the core of the rotary press-fit pile is usually displaced from the core of the construction device when the gripping position by the gripping mechanism is changed, that is, when refilling. Make sure that the rotary press-fit pile is suspended by a crane.
  • the construction site is submarine ground or lake bottom ground, the rotary press-in pile is moved in the horizontal direction from the initial position due to the influence of the tidal current and the water flow in the lake. There was a problem that it could not be constructed well because it was off the core.
  • the problem of misalignment of such rotary press-fit piles is not limited to the construction on the seabed ground or the lake bottom ground, but also occurs when construction is performed on land.
  • the rotary press-in pile is installed on a slanted ground surface
  • the rotary press-in pile is rotationally press-fitted so as to be substantially perpendicular to the slanted ground surface, Is slanted rather than vertical. Therefore, a moment due to its own weight acts on the rotary press-fit pile, and this causes misalignment of the rotary press-fit pile with respect to the construction device.
  • the present invention has been made in view of the above circumstances, and even when the construction site is the seabed ground or lake bottom ground, and even when the ground surface is inclined obliquely on land or the seabed, Rotating press-fitting pile construction equipment and construction that can prevent the core from shifting from the core of the construction equipment while rotating the press-fitted pile into the ground and eliminate the need to remove the shackle from the rotary press-fitted pile after construction. It aims to provide a method.
  • the rotary press-fit pile construction apparatus includes a frame, a main chuck capable of gripping the rotary press-fit pile having a spiral blade at the tip, and the main chuck in a state of gripping the rotary press-fit pile.
  • the rotary press-fitting pile construction apparatus comprising: a rotary mechanism that rotates; and a lifting mechanism that is attached to the frame and supports the main chuck so as to be able to be lifted and lowered in order to apply a propulsive force to the rotary press-fit pile.
  • An upper sub-chuck and a lower sub-chuck capable of gripping the rotary press-fitting pile are attached to the frame or the lifting mechanism so as to be positioned above and below the main chuck.
  • the gripping of the rotary press-fitting pile by the sub chuck is released while the rotary press-fitting pile is held by the main chuck, the main chuck is rotated by the rotating mechanism, and the main chuck is lowered by the lifting mechanism. Then, the rotary press-fitting pile is rotary press-fitted into the ground by a predetermined length (rotary press-fitting process). After that, while holding the rotary press-fit pile with the upper sub-chuck and the lower chuck, release the grip of the rotary press-fit pile with the main chuck, raise the main chuck with the lifting mechanism, and then hold the rotary press-fit pile with the main chuck (Reordering process).
  • the rotary press-fitting pile is rotationally press-fitted to a predetermined depth of the ground by repeating both the above steps alternately.
  • the rotary press-fit pile when changing the gripping position of the rotary press-fit pile by the main chuck, that is, at the time of refilling, the rotary press-fit pile is gripped by the upper sub-chuck and the lower sub-chuck respectively arranged on the upper side and the lower side of the main chuck,
  • the core of the rotary press-fit pile does not deviate from the construction equipment.
  • the construction site is submarine ground or lake bottom ground, even when it is affected by tidal currents or water currents, and when rotary press-fitting piles are tilted obliquely, Even when a moment due to its own weight acts, it is possible to prevent the core of the rotary press-fit pile from being displaced from the core of the construction device.
  • the rotary press-fitted pile when only the upper sub chuck is arranged on the upper side of the main chuck or only the lower sub chuck is arranged on the lower side, and when changing the size, when the rotary press-fitting pile is gripped only by any one of the upper sub chuck or the lower sub chuck, Since the gripping is stopped by one point in the height direction, it cannot be firmly gripped. Therefore, when the rotary press-fitted pile is gripped before the rotary press-fitting or at the initial press-fitting stage, the rotary press-fitted pile may cause misalignment with respect to the construction apparatus when affected by tidal current or water flow.
  • the rotary press-in of the rotary press-fit pile can be performed without using the crane to support the rotary press-fit pile, it is not necessary to remove the shackle from the rotary press-fit pile after the construction, which is conventionally performed.
  • the upper sub-chuck is attached to the lifting mechanism
  • the lower sub-chuck is attached to the frame
  • the rotary press-fit pile at the tip of the upper sub-chuck A roller may be attached to a portion that contacts the roller.
  • the roller is attached to the portion of the top end of the upper sub-chuck that contacts the rotary press-fit pile, the tip of the upper sub-chuck rolls on the outer peripheral surface of the rotary press-fit pile via the roller while the rotary press-fit pile. Will be held. That is, the upper sub-chuck can hold the rotary press-fit pile while changing the contact position with respect to the rotary press-fit pile.
  • the upper sub-chuck or the lower sub-chuck may be configured by a plurality of cylinders that extend and contract toward the rotary press-fit pile.
  • the upper sub-chuck or the lower sub-chuck can be easily held and released from the rotary press-in pile by the extension and compression operations of the cylinder.
  • cylinders have been used a lot in the past, and since there are many records of use, they are excellent in terms of reliability.
  • the construction method using the rotary press-fitting pile construction device is configured to release the rotary press-fitting pile by the sub chuck while the rotary press-fitting pile is gripped by the main chuck.
  • a rotary press-fitting step in which the main chuck is rotated by a mechanism and the main chuck is lowered by the lifting mechanism to rotationally press-fit the rotary press-fitted pile into the ground; and the rotary press-fitted pile by the upper sub-chuck and the lower chuck
  • the rotary press-fitting pile is performed by alternately repeating the rotary press-fitting step and the refilling step. Rotating pressed to a predetermined depth of soil.
  • the rotary press-fit pile can be rotationally press-fitted into the ground while preventing the core of the rotary press-fit pile from being displaced from the core of the construction device.
  • the present invention even when the construction site is submarine ground or lake bottom ground and is affected by tidal currents or water currents, it is also the case where rotational press-fitting is performed while the rotary press-in pile is inclined obliquely. Even when a moment due to its own weight acts on the pile, it is possible to prevent the core of the rotary press-fit pile from being displaced from the core of the construction device. Moreover, since the rotary press-in of the rotary press-fit pile can be performed without using the crane to support the rotary press-fit pile, it is not necessary to remove the shackle from the rotary press-fit pile after the construction, which is conventionally performed.
  • the upper sub chuck when the upper sub chuck ascends integrally with the main chuck by the elevating mechanism, the upper sub chuck can grip the rotary press-fit pile while changing the contact position with respect to the rotary press-fit pile. it can.
  • the upper sub-chuck or the lower sub-chuck can be easily grasped and released from the rotary press-fitting pile with a simple configuration, and high reliability can be obtained.
  • the core of the rotary press-fit pile can be prevented from being displaced from the core of the construction apparatus.
  • 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.
  • process explanatory drawing which shows the fixing method of the base
  • process explanatory drawing which shows the fixing method of the base
  • FIG. 1 is a schematic side view showing an example in which a rotary press-fit pile is rotationally press-fitted into the seabed ground using the rotary press-fit pile construction apparatus of the embodiment of the present invention
  • FIG. 2 is a perspective view showing the entire construction apparatus
  • FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3
  • FIG. 5 is a cross-sectional view taken along line VV in FIG.
  • 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 in this embodiment is an example in the case of rotary press-fitting the rotary press-in pile P into the seabed ground G.
  • the rotary press-in pile construction device 1 is suspended in the sea via a rope 4 by a crane 3 mounted on a construction ship 2. As shown in FIGS.
  • the rotary press-in pile construction device 1 includes a base 10, a total swivel machine 11 attached to the center of the base 10, and a plurality of (for example, And four reaction force pile rotary press-fitting devices 12 that are attached every 90 degrees in the circumferential direction.
  • the all-swivel machine 11 rotationally press-fits the rotary press-fit pile P into the seabed ground G.
  • the reaction force pile rotational press-fitting device 12 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.
  • the construction ship 2 is provided with a GPS device 13 so that an accurate position of the construction ship 2 is grasped.
  • a transponder 14 is attached to the rotary press-fitting pile construction apparatus 1, and a signal emitted from the transponder 14 is received by a responder 15 provided in the construction ship 2.
  • the relative positional relationship of the rotary press-fitting pile construction device 1 with respect to the construction ship 2 is grasped, and coupled with the detection result of the GPS device 13 provided in the construction boat 2, the accuracy of the rotary press-fitting pile construction device 1 Position information can be grasped.
  • the base 10 also serves as a frame of the swivel 11, and a hole 10a for inserting the rotary press-fit pile P is inserted into the center of the base 10. Is formed. 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.
  • 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 by a connecting plate 27 attached to the output side base portion 21A of the hydraulic cylinder 21 via a chuck collar elevating cylinder 26 so as to be able to move up and down.
  • a cylindrical body 29 is attached to the upper side of the horizontal lower plate 24, and a tapered surface 29 a that gradually increases in diameter as it goes upward is formed on the upper inner periphery of the cylindrical body 29.
  • 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.
  • These collar support blocks 30 are positioned so as to be positioned on the center side of the horizontal upper plate 25 (the side on which the rotary pressure pile P is disposed) from directly below the support position of the link 31 via the link 31 and horizontally. It is attached to the upper plate 25 so as to be rotatable in a vertical plane.
  • 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, and the inclined surface 30a corresponds to the tapered surface 29a of the cylindrical body 29.
  • a main chuck collar 32 is attached to the inner side of the collar support block 30 (the side facing the rotary press-fitting pile P), and a plurality of high friction members 32a are vertically arranged on the inner side of the main chuck collar 32. It is attached at intervals.
  • 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 same radial direction integrally with the collar support block 30, and the rotary press-fit pile P disposed at the center of the base 10 is subjected to high friction. Grip through the member 32a.
  • each collar support block 30 is raised.
  • the main chuck collar 32 attached to the collar support block 30 also moves outward in the same radial direction together with the collar support block 30 and releases the grip on the rotary press-fit pile P. That is, in the main chuck 22, the rotary press-fit pile P can be grasped and released by the main chuck collar 32 by operating the chuck collar elevating cylinder 26 to be shortened or extended. Yes.
  • 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 biased 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 that of the all-swivel machine 11 except that it does not have an upper sub-chuck 40 and a lower sub-chuck 41, a main chuck 22, and a main chuck.
  • the rotating mechanism 35 that rotates the rotating mechanism 22 and the lifting mechanism that moves the main chuck 22 up and down are smaller than those of the all-swivel machine 11 described above, and the object to be rotationally pressed by the reaction force pile rotating press-fitting device 12 is The point is a reaction force pile 45 (small rotary press-fit pile) having a spiral blade 45a at the tip.
  • 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 device 1 to the seabed ground G 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 construction apparatus 1 with respect to the construction ship 2 can be accurately known by receiving the position signal transmitted from the transponder 14 attached to the construction apparatus 1 of the rotary press-fit pile by the responder 15 of the construction ship 2. it can.
  • 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. The rotary press-in pile construction device 1 is pulled up via the rope 4, the construction ship 2 is moved, and the position of the rotary press-in pile construction device 1 is adjusted again to the 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.
  • 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 surface of the submarine ground G is inclined obliquely as shown in FIGS.
  • the relative height position (depth position) of the reaction force pile 45 with respect to the base 10 is determined by the lifting mechanism incorporated in the reaction force pile rotation press-fitting device 12. adjust. Thereby, as shown in FIG. 8, it adjusts so that the base
  • FIG. 9 is a process diagram showing a construction method of a rotary press-fit pile using the rotary press-fit pile construction apparatus of the embodiment of the present invention
  • FIGS. 10 to 15 are process explanatory diagrams showing details of the construction method of the rotary press-fit pile. It is.
  • 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.
  • 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 29a of the cylindrical member, that is, , Move so as to approach the rotary press-fit pile P.
  • the rotary press-fit pile P is gripped by the main chuck collar 32 and the high friction member 32a.
  • the gripping of the rotary press-fitting pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released in a state where the rotary press-fitting pile P is gripped by the main chuck 22.
  • 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 main chuck 22 is moved by the rotating mechanism 35 shown in FIG. 3. Rotate 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 by the seabed ground G.
  • the rotary press-fit pile P is rotationally press-fitted downward in the seabed ground G by a screw action (rotary press-fitting process).
  • a reaction force when the rotary press-fitting pile P is rotationally press-fitted is applied to the base 10, but the reaction force pile 45 rotationally press-fitted by the reaction force pile rotary press-fitting device 12 counters 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, and the base 10 is rotated in the direction opposite to the rotation of the rotary press-fit pile P. Each can be prevented.
  • 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 attached to the output side of the hydraulic cylinder 21, the upper sub chuck 40 is also raised integrally with the main chuck.
  • the roller is attached to the portion that contacts the rotary press-fit pile P at the tip of the upper sub-chuck 40, the tip of the upper sub-chuck 40 rolls on the outer peripheral surface of the rotary press-fit pile P via the roller, The rotary press-fit pile P is gripped. 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, the chuck collar elevating cylinder 26 is operated to be shortened while the gripping of the rotary press-fit pile by the upper sub-chuck 40 and the lower sub-chuck 41 is continued, and the rotary press-fit pile P by the main chuck 22 is operated. Grip. 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).
  • the rotary press-fitting pile P can reach the predetermined depth of the seabed ground G by repeatedly performing the rotary press-fitting 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-in pile P is not shifted from the construction device 1 of the rotary press-in pile.
  • the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
  • the example which rotationally press-fits the rotary press-in pile P to the seabed ground G using the construction apparatus 1 of the rotary press-fit pile was shown, it is not restricted to this, The rotary press-fit pile P to land on land
  • the present invention can also be applied to the case where the rotary press-fitting is performed.
  • the upper sub chuck 40 is provided on the output side of the hydraulic cylinder 21 that is a lifting mechanism.
  • the upper sub chuck 40 may be attached to the frame without being limited thereto.
  • the upper sub-chuck 40 and the lower sub-chuck 41 are provided one step above and below the main chuck 22 respectively, but the upper sub-chuck 40 and the lower sub-chuck 41 are not limited to this. A plurality of stages may be provided.
  • the upper sub-chuck 40 and the lower sub-chuck 41 are configured by a (hydraulic or air) cylinder.
  • the present invention is not limited to this, and a plurality of links can be combined like a diaphragm mechanism of a camera. It may be of a different structure.
  • the rotary press-in pile construction apparatus and method of the present invention even when the construction site is undersea ground or lake bottom ground and is affected by tidal current or water flow, the rotary press-in pile is inclined obliquely. Even if it is a case where it press-rotates in and it is a case where the moment by a dead weight acts on a rotary press-fit pile, it can prevent that the core of a rotary press-fit pile shifts from the core of a construction apparatus.
  • the rotary press-in pile construction device and method of the present invention since the rotary press-in pile can be rotary press-in without supporting the rotary press-in pile using a crane, There is no need to remove the shackle from the rotary press-fit pile. Therefore, it has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The present invention is provided with: a frame; a main chuck (22) that can hold a rotary press-in pile (P) having a helical blade (Pa) at the tip thereof; a rotary mechanism (35) that causes the main chuck (22) to rotate in the state of holding a rotary press-in pile (P); and a rising/falling mechanism (21) that is attached to the frame, and that supports the main chuck (22) in a manner able to rise and fall in order to impart propulsive force to the rotary press-in pile (P). An upper subchuck (40) and lower subchuck (41) that can hold the rotary press-in pile (P) are attached in a manner so as to be positioned above and below the main chuck (22).

Description

回転圧入杭の施工装置及び施工方法Rotary press-in pile construction equipment and construction method
　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、回転圧入杭の施工装置及び施工方法に関するものである。
　本願は、２０１２年１２月２８日に日本で出願された特願２０１２－２８７６５１号基づき優先権を主張し、それらの内容をここに援用する。 The present invention relates to a rotary press-in pile construction device and a construction method in which a rotary press-fit pile having a spiral blade at the tip is press-fitted while rotating into the ground.
This application claims priority based on Japanese Patent Application No. 2012-287651 for which it applied in Japan on December 28, 2012, and uses those 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。
　この回転圧入杭の施工装置は、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、を備えたものである。
　そして、この回転圧入杭の施工装置では、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ことにより回転圧入杭を地盤に回転圧入することができる。 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.
This rotary press-in pile construction device has a gripping mechanism that detachably holds the rotary press-fit pile, a rotary mechanism that rotates the gripping mechanism while gripping the rotary press-fit pile, and a propulsive force to the rotary press-fit pile. And a lifting mechanism that supports the gripping mechanism so as to be movable up and down.
In this rotary press-fit pile construction device, the length of the rotary press-fit pile can be determined by rotating the gripping mechanism with the rotary mechanism while holding the rotary press-fit pile with the gripping mechanism and lowering the gripping mechanism with the lifting mechanism. The rotary press-fit pile can be rotationally press-fitted into the ground by repeating each predetermined length while changing the gripping position on the rotary press-fit pile by the gripping mechanism along the direction.
日本国特開２００１－１４６７４４号公報Japanese Unexamined Patent Publication No. 2001-146744
　特許文献１に記載の回転圧入杭の施工装置を用いて施工する場合には、通常、把持機構による把持位置を変える際つまり盛り替えの際に、回転圧入杭の芯が施工装置の芯からずれないように回転圧入杭をクレーンで吊り下げた状態で施工する。しかし、施工場所が海底地盤あるいは湖底地盤のときには、回転圧入杭が潮流や湖中の水流による影響を受けて初期位置から水平方向へ移動してしまい、結果的に回転圧入杭の芯が施工装置の芯からずれるために、うまく施工できないという課題があった。
　また、このような回転圧入杭の芯ずれの問題は、海底地盤あるいは湖底地盤での施工に限らず、陸上で施工する場合でも起こる。すなわち、回転圧入杭の施工場所が、斜めに傾斜した地盤表面の場合、そのような斜めの地盤表面に略垂直となるように回転圧入杭を回転圧入するときには、施工時において回転圧入杭の姿勢が鉛直ではなく斜めに傾斜する。従って、回転圧入杭に対して自重によるモーメントが作用し、これに起因して回転圧入杭の施工装置に対する芯ずれが起こる。 When construction is performed using the rotary press-in pile construction device described in Patent Literature 1, the core of the rotary press-fit pile is usually displaced from the core of the construction device when the gripping position by the gripping mechanism is changed, that is, when refilling. Make sure that the rotary press-fit pile is suspended by a crane. However, when the construction site is submarine ground or lake bottom ground, the rotary press-in pile is moved in the horizontal direction from the initial position due to the influence of the tidal current and the water flow in the lake. There was a problem that it could not be constructed well because it was off the core.
Moreover, the problem of misalignment of such rotary press-fit piles is not limited to the construction on the seabed ground or the lake bottom ground, but also occurs when construction is performed on land. In other words, when the rotary press-in pile is installed on a slanted ground surface, when the rotary press-in pile is rotationally press-fitted so as to be substantially perpendicular to the slanted ground surface, Is slanted rather than vertical. Therefore, a moment due to its own weight acts on the rotary press-fit pile, and this causes misalignment of the rotary press-fit pile with respect to the construction device.
　また、施工場所が海底地盤あるいは湖底地盤の場合であって、クレーンで回転圧入杭を吊り下げて施工する場合、回転圧入杭の上端にシャックルを取り付け、この取り付けたシャックルとクレーンの先端から伸びるスリングとを接続して施工を行なっていた。施工後は、シャックルを回転圧入杭から取り外し、スリングを回収するが、水深が深い海域での施工では、ダイバーが潜れないため、シャックルの取り外しが困難になる課題があった。 In addition, when the construction site is undersea or lake bottom, and when the rotary press pile is suspended by a crane, a shackle is attached to the upper end of the rotary press pile and the sling extends from the attached shackle and the tip of the crane. And was connected to. After the construction, the shackle is removed from the rotary press-fit pile and the sling is collected. However, in the construction in the deep water area, there is a problem that it is difficult to remove the shackle because divers cannot dive.
　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、さらに、陸上あるいは海底等において地盤表面が斜めに傾斜する場合であっても、杭芯が施工装置の芯からずれるのを防止しつつ回転圧入杭を地盤に回転圧入することができ、また、施工後にシャックルを回転圧入杭から取り外す手間も不要になる回転圧入杭の施工装置及び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 lake bottom ground, and even when the ground surface is inclined obliquely on land or the seabed, Rotating press-fitting pile construction equipment and construction that can prevent the core from shifting from the core of the construction equipment while rotating the press-fitted pile into the ground and eliminate the need to remove the shackle from the rotary press-fitted pile after construction. It aims to provide a method.
　本発明は、上記課題を解決するために、以下の手段を採用する。
　即ち、本発明の一態様に係る回転圧入杭の施工装置は、フレームと、先端に螺旋羽根を有する回転圧入杭を把持可能なメインチャックと、前記回転圧入杭を把持した状態で前記メインチャックを回転させる回転機構と、前記フレームに取り付けられて、前記回転圧入杭に推進力を付与すべく、前記メインチャックを昇降自在に支持する昇降機構と、を備えた回転圧入杭の施工装置において、前記フレームまたは前記昇降機構に、前記回転圧入杭を把持可能な上部サブチャックと下部サブチャックが、前記メインチャックの上側と下側に位置するように取り付けられたことを特徴とする。 The present invention employs the following means in order to solve the above problems.
That is, the rotary press-fit pile construction apparatus according to one aspect of the present invention includes a frame, a main chuck capable of gripping the rotary press-fit pile having a spiral blade at the tip, and the main chuck in a state of gripping the rotary press-fit pile. In the rotary press-fitting pile construction apparatus, comprising: a rotary mechanism that rotates; and a lifting mechanism that is attached to the frame and supports the main chuck so as to be able to be lifted and lowered in order to apply a propulsive force to the rotary press-fit pile. An upper sub-chuck and a lower sub-chuck capable of gripping the rotary press-fitting pile are attached to the frame or the lifting mechanism so as to be positioned above and below the main chuck.
　本発明によれば、メインチャックにより回転圧入杭を把持させた状態でサブチャックによる回転圧入杭の把持を解除し、回転機構によりメインチャックを回転させ、かつ、昇降機構によりメインチャックを下降させることで、回転圧入杭を地盤に所定長だけ回転圧入する（回転圧入工程）。その後、上部サブチャックおよび下部チャックにより回転圧入杭を把持した状態で、メインチャックによる回転圧入杭の把持を解除し、昇降機構により前記メインチャックを上昇させ、その後メインチャックにより回転圧入杭を把持させる（盛り替え工程）。以下、上記両工程を交互に繰り返し行なうことで、回転圧入杭を地盤の所定深さまで回転圧入する。 According to the present invention, the gripping of the rotary press-fitting pile by the sub chuck is released while the rotary press-fitting pile is held by the main chuck, the main chuck is rotated by the rotating mechanism, and the main chuck is lowered by the lifting mechanism. Then, the rotary press-fitting pile is rotary press-fitted into the ground by a predetermined length (rotary press-fitting process). After that, while holding the rotary press-fit pile with the upper sub-chuck and the lower chuck, release the grip of the rotary press-fit pile with the main chuck, raise the main chuck with the lifting mechanism, and then hold the rotary press-fit pile with the main chuck (Reordering process). Hereinafter, the rotary press-fitting pile is rotationally press-fitted to a predetermined depth of the ground by repeating both the above steps alternately.
　ここで、メインチャックによる回転圧入杭の把持位置を変えるとき、つまり盛り替えのときに、メインチャックの上側及び下側にそれぞれ配置した上部サブチャックと下部サブチャックにより回転圧入杭を把持させるので、回転圧入杭の芯が施工装置に対してずれることがない。つまり、施工場所が海底地盤あるいは湖底地盤のときであって、潮流や水流の影響を受けるときでも、また、回転圧入杭を斜めに傾斜した状態で回転圧入する場合であって、回転圧入杭に自重によるモーメントが作用する場合であっても、回転圧入杭の芯が施工装置の芯からずれるのを防止することができる。
　なお、メインチャックの上側に上部サブチャックのみあるいは下側に下部サブチャックのみ配置し、盛り替えのとき、それらいずれかの上部サブチャックあるいは下部サブチャックのみによって回転圧入杭を把持させる場合には、高さ方向１点による把持に止まるため強固な把持が行なえない。したがって、回転圧入前あるいは初期の圧入段階の回転圧入杭を把持させる場合であって、潮流や水流の影響を受けたときには、当該回転圧入杭が施工装置に対して芯ずれを起こすおそれがある。
　また、クレーンを用いて回転圧入杭を支持することなく回転圧入杭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からシャックルを取り外す手間が不要になる。 Here, when changing the gripping position of the rotary press-fit pile by the main chuck, that is, at the time of refilling, the rotary press-fit pile is gripped by the upper sub-chuck and the lower sub-chuck respectively arranged on the upper side and the lower side of the main chuck, The core of the rotary press-fit pile does not deviate from the construction equipment. In other words, even when the construction site is submarine ground or lake bottom ground, even when it is affected by tidal currents or water currents, and when rotary press-fitting piles are tilted obliquely, Even when a moment due to its own weight acts, it is possible to prevent the core of the rotary press-fit pile from being displaced from the core of the construction device.
In addition, when only the upper sub chuck is arranged on the upper side of the main chuck or only the lower sub chuck is arranged on the lower side, and when changing the size, when the rotary press-fitting pile is gripped only by any one of the upper sub chuck or the lower sub chuck, Since the gripping is stopped by one point in the height direction, it cannot be firmly gripped. Therefore, when the rotary press-fitted pile is gripped before the rotary press-fitting or at the initial press-fitting stage, the rotary press-fitted pile may cause misalignment with respect to the construction apparatus when affected by tidal current or water flow.
Moreover, since the rotary press-in of the rotary press-fit pile can be performed without using the crane to support the rotary press-fit pile, it is not necessary to remove the shackle from the rotary press-fit pile after the construction, which is conventionally performed.
　本発明の一態様に係る回転圧入杭の施工装置は、前記上部サブチャックが前記昇降機構に取り付けられるとともに、前記下部サブチャックが前記フレームに取り付けられ、前記上部サブチャックの先端の前記回転圧入杭に当接する部分に、ローラーが取り付けられてもよい。
　本発明によれば、盛り替え工程において昇降機構によりメインチャックを上昇させる際に、上部サブチャックを昇降機構に取り付けている関係上、回転圧入杭は高さを維持したままであるが、上部サブチャックはメインチャックと一体的に上昇する。このとき、上部サブチャックの先端の前記回転圧入杭に当接する部分にローラーを取り付けているので、上部サブチャックの先端は、回転圧入杭の外周面にローラーを介して転がりながら、当該回転圧入杭を把持することとなる。つまり、上部サブチャックは、回転圧入杭に対し、当接位置を変えながら回転圧入杭を把持することができる。 In the rotary press-fit pile construction apparatus according to one aspect of the present invention, the upper sub-chuck is attached to the lifting mechanism, the lower sub-chuck is attached to the frame, and the rotary press-fit pile at the tip of the upper sub-chuck A roller may be attached to a portion that contacts the roller.
According to the present invention, when the main chuck is lifted by the lifting mechanism in the refilling process, the rotary press-fitting pile is maintained in height because the upper sub-chuck is attached to the lifting mechanism. The chuck rises integrally with the main chuck. At this time, since the roller is attached to the portion of the top end of the upper sub-chuck that contacts the rotary press-fit pile, the tip of the upper sub-chuck rolls on the outer peripheral surface of the rotary press-fit pile via the roller while the rotary press-fit pile. Will be held. That is, the upper sub-chuck can hold the rotary press-fit pile while changing the contact position with respect to the rotary press-fit pile.
　本発明の一態様に係る回転圧入杭の施工装置は、前記上部サブチャックまたは下部サブチャックは、それぞれ前記回転圧入杭に向かって伸縮する複数のシリンダにより構成されていてもよい。
　本発明の回転圧入杭の施工装置によればこれにより、シリンダの伸張、圧縮操作によって、それら上部サブチャックまたは下部サブチャックの回転圧入杭への把持とその解除を容易に行なえる。また、シリンダは従来から多く使用されており、使用実績も数多くあるので、信頼性の面でも優れる。 In the rotary press-fit pile construction apparatus according to an aspect of the present invention, the upper sub-chuck or the lower sub-chuck may be configured by a plurality of cylinders that extend and contract toward the rotary press-fit pile.
Thus, according to the rotary press-in pile construction apparatus of the present invention, the upper sub-chuck or the lower sub-chuck can be easily held and released from the rotary press-in pile by the extension and compression operations of the cylinder. In addition, cylinders have been used a lot in the past, and since there are many records of use, they are excellent in terms of reliability.
　本発明の一態様に係る回転圧入杭の施工装置を用いた施工方法は、前記メインチャックにより前記回転圧入杭を把持させた状態で前記サブチャックによる前記回転圧入杭の把持を解除し、前記回転機構により前記メインチャックを回転させ、かつ、前記昇降機構により前記メインチャックを下降させて前記回転圧入杭を地盤に回転圧入させる回転圧入工程と、前記上部サブチャックおよび前記下部チャックにより前記回転圧入杭を把持させた状態で、前記メインチャックによる前記回転圧入杭の把持を解除し、前記昇降機構により前記メインチャックを上昇させ、その後前記メインチャックにより前記回転圧入杭を把持させる盛り替え工程とを備え、前記回転圧入工程と前記盛り替え工程とを交互に繰り返し行なうことで、前記回転圧入杭を地盤の所定深さまで回転圧入する。 The construction method using the rotary press-fitting pile construction device according to one aspect of the present invention is configured to release the rotary press-fitting pile by the sub chuck while the rotary press-fitting pile is gripped by the main chuck. A rotary press-fitting step in which the main chuck is rotated by a mechanism and the main chuck is lowered by the lifting mechanism to rotationally press-fit the rotary press-fitted pile into the ground; and the rotary press-fitted pile by the upper sub-chuck and the lower chuck A refilling step of releasing gripping of the rotary press-fit pile by the main chuck, raising the main chuck by the lifting mechanism, and then gripping the rotary press-fit pile by the main chuck. The rotary press-fitting pile is performed by alternately repeating the rotary press-fitting step and the refilling step. Rotating pressed to a predetermined depth of soil.
　本発明によれば、回転圧入杭の芯が施工装置の芯からずれるのを防止しつつ、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, the rotary press-fit pile can be rotationally press-fitted into the ground while preventing the core of the rotary press-fit pile from being displaced from the core of the construction device.
　本発明によれば、施工場所が海底地盤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ときでも、また、回転圧入杭を斜めに傾斜した状態で回転圧入する場合であって回転圧入杭に自重によるモーメントが作用する場合であっても、回転圧入杭の芯が施工装置の芯からずれるのを防止することができる。
　また、クレーンを用いて回転圧入杭を支持することなく回転圧入杭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からシャックルを取り外す手間が不要になる。 According to the present invention, even when the construction site is submarine ground or lake bottom ground and is affected by tidal currents or water currents, it is also the case where rotational press-fitting is performed while the rotary press-in pile is inclined obliquely. Even when a moment due to its own weight acts on the pile, it is possible to prevent the core of the rotary press-fit pile from being displaced from the core of the construction device.
Moreover, since the rotary press-in of the rotary press-fit pile can be performed without using the crane to support the rotary press-fit pile, it is not necessary to remove the shackle from the rotary press-fit pile after the construction, which is conventionally performed.
　本発明によれば、昇降機構によってメインチャックと一体的に上部サブチャックが上昇するときに、該上部サブチャックは、回転圧入杭に対し、当接位置を変えながら回転圧入杭を把持させることができる。 According to the present invention, when the upper sub chuck ascends integrally with the main chuck by the elevating mechanism, the upper sub chuck can grip the rotary press-fit pile while changing the contact position with respect to the rotary press-fit pile. it can.
　本発明によれば、簡単な構成で、上部サブチャックまたは下部サブチャックの回転圧入杭への把持とその解除を容易に行なえ、しかも高い信頼性が得られる。 According to the present invention, the upper sub-chuck or the lower sub-chuck can be easily grasped and released from the rotary press-fitting pile with a simple configuration, and high reliability can be obtained.
　本発明によれば、回転圧入杭の芯が施工装置の芯からずれるのを防止することができる。 According to the present invention, the core of the rotary press-fit pile can be prevented from being displaced from the core of the construction apparatus.
本発明の実施形態の回転圧入杭の施工装置を用いた施工方法の例を示す概略側面図である。It is a schematic side view which shows the example of the construction method using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 同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. 本発明の実施形態の回転圧入杭の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 the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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. 本発明の実施形態の回転圧入杭の施工装置の基盤の定着方法を示す工程説明図である。It is process explanatory drawing which shows the fixing method of the base | substrate of the construction apparatus of the rotary press-fit pile of embodiment of this invention. 本発明の実施形態の回転圧入杭の施工装置の基盤の定着方法を示す工程説明図である。It is process explanatory drawing which shows the fixing method of the base | substrate of the construction apparatus of the rotary press-fit pile of embodiment of this invention. 本発明の実施形態の回転圧入杭の施工装置の基盤の定着方法を示す工程説明図である。It is process explanatory drawing which shows the fixing method of the base | substrate of the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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。It is process drawing which shows the construction method of the rotary press-in pile using the rotary press-in pile construction apparatus of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention. 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の詳細を示す工程説明図である。It is process explanatory drawing which shows the detail of the construction method of the rotary press-fit pile using the construction apparatus of the rotary press-fit pile of embodiment of this invention.
　以下、本発明の実施形態を図面に基づいて説明する。
　図１は本発明の実施形態の回転圧入杭の施工装置を用いて海底地盤に回転圧入杭を回転圧入する例を示す概略側面図、図２は同施工装置の全体を示す斜視図、図３は同施工装置の要部を示す断面図、図４は図３のIV－IV線に沿う断面図、図５は図３のV－V線に沿う断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view showing an example in which a rotary press-fit pile is rotationally press-fitted into the seabed ground using the rotary press-fit pile construction apparatus of the embodiment of the present invention, FIG. 2 is a perspective view showing the entire construction apparatus, and FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along line VV in FIG.
　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）。
　この実施形態における回転圧入杭の施工装置１は、海底地盤Ｇに回転圧入杭Ｐを回転圧入する場合の例である。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た全旋回機１１と、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）周方向９０度置きに取り付けられた反力杭回転圧入装置１２とを備える。全旋回機１１は、回転圧入杭Ｐを海底地盤Ｇに回転圧入する。反力杭回転圧入装置１２は、反力杭４５を海底地盤Ｇに回転圧入する。この反力杭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。 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).
The rotary press-in pile construction apparatus 1 in this embodiment is an example in the case of rotary press-fitting the rotary press-in pile P into the seabed ground G. The rotary press-in pile construction device 1 is suspended in the sea via a rope 4 by a crane 3 mounted on a construction ship 2.
As shown in FIGS. 1 and 2, the rotary press-in pile construction device 1 includes a base 10, a total swivel machine 11 attached to the center of the base 10, and a plurality of (for example, And four reaction force pile rotary press-fitting devices 12 that are attached every 90 degrees in the circumferential direction. The all-swivel machine 11 rotationally press-fits the rotary press-fit pile P into the seabed ground G. The reaction force pile rotational press-fitting device 12 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.
　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にはトランスポンダ１４が取り付けられ、ここから発せられる信号が、施工船２に備えられたレスポンダ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の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.
A transponder 14 is attached to the rotary press-fitting pile construction apparatus 1, and a signal emitted from the transponder 14 is received by a responder 15 provided in the construction ship 2. Thereby, the relative positional relationship of the rotary press-fitting pile construction device 1 with respect to the construction ship 2 is grasped, and coupled with the detection result of the GPS device 13 provided in the construction boat 2, the accuracy of the rotary press-fitting pile construction device 1 Position information can be grasped.
　全旋回機１１について説明すると、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、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 swirler 11 will be described. As shown in FIGS. 3 to 5, the base 10 also serves as a frame of the swivel 11, and a hole 10a for inserting the rotary press-fit pile P is inserted into the center of the base 10. Is formed. 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 support column 20, and a main chuck 22 for detachably holding the rotary press-fit pile P is attached to the output side base portion 21 </ b> A of these hydraulic cylinders 21. It is rotatably attached 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によって、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、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。これらカラー支持ブロック３０は、それぞれリンク３１を介して該リンク３１の支持位置の真下よりも水平上板２５の中心側（回転圧力杭Ｐが配置される側）に位置するように、しかも、水平上板２５に対して鉛直面内で回転可能に取り付けられている。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、この傾斜面３０ａは前記円筒体２９のテーパー面２９ａに対応する。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が取り付けられ、この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 by a connecting plate 27 attached to the output side base portion 21A of the hydraulic cylinder 21 via a chuck collar elevating cylinder 26 so as to be able to move up and down.
A cylindrical body 29 is attached to the upper side of the horizontal lower plate 24, and a tapered surface 29 a that gradually increases in diameter as it goes upward is formed on the upper inner periphery of the cylindrical body 29. 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. These collar support blocks 30 are positioned so as to be positioned on the center side of the horizontal upper plate 25 (the side on which the rotary pressure pile P is disposed) from directly below the support position of the link 31 via the link 31 and horizontally. It is attached to the upper plate 25 so as to be rotatable in a vertical plane. 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, and the inclined surface 30a corresponds to the tapered surface 29a of the cylindrical body 29. A main chuck collar 32 is attached to the inner side of the collar support block 30 (the side facing the rotary press-fitting pile P), and a plurality of high friction members 32a are vertically arranged on the inner side of the main chuck collar 32. It is attached at intervals.
　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と一体になって同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。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と一体になって同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が行なえるようになっている。 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 same radial direction integrally with the collar support block 30, and the rotary press-fit pile P disposed at the center of the base 10 is subjected to 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. Therefore, the main chuck collar 32 attached to the collar support block 30 also moves outward in the same radial direction together with the collar support block 30 and releases the grip on the rotary press-fit pile P.
That is, in the main chuck 22, the rotary press-fit pile P can be grasped and released by the main chuck collar 32 by operating the chuck collar elevating cylinder 26 to be shortened or extended. Yes.
　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。しかし、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 biased 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及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とほぼ同様な構成であり、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 that of the all-swivel machine 11 except that it does not have an upper sub-chuck 40 and a lower sub-chuck 41, a main chuck 22, and a main chuck. The rotating mechanism 35 that rotates the rotating mechanism 22 and the lifting mechanism that moves the main chuck 22 up and down are smaller than those of the all-swivel machine 11 described above, and the object to be rotationally pressed by the reaction force pile rotating press-fitting device 12 is The point is a reaction force pile 45 (small rotary press-fit pile) having a spiral blade 45a at the tip.
　次に、上記構成の回転圧入杭の施工装置を用いて海底地盤Ｇに回転圧入杭を回転圧入する施工方法について、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を介して海底地盤Ｇまで吊り下ろす。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 construction method for rotationally press-fitting a rotary press-fitting pile into the seabed ground G using the rotary press-fitting pile construction apparatus having the above 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 device 1 to the seabed ground G 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が、回転圧入杭の施工装置１の施工船２に対する相対的な位置は、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. . Moreover, 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. The relative position of the construction apparatus 1 with respect to the construction ship 2 can be accurately known by receiving the position signal transmitted from the transponder 14 attached to the construction apparatus 1 of the rotary press-fit pile by the responder 15 of the construction ship 2. it can. 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を判断し、そ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. The rotary press-in pile construction device 1 is pulled up via the rope 4, the construction ship 2 is moved, and the position of the rotary press-in pile construction device 1 is adjusted again to the 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１０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。
　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中の所定深さまで回転圧入した後、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調整する。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 a fixing method of the substrate 10 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. 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.
Here, when the surface of the submarine ground G is inclined obliquely as shown in FIGS. 6 and 7, after the reaction force pile 45 is rotationally press-fitted to a predetermined depth in the submarine ground G, Based on the inclination information emitted from the mounted level, the relative height position (depth position) of the reaction force pile 45 with respect to the base 10 is determined by the lifting mechanism incorporated in the reaction force pile rotation press-fitting device 12. adjust.
Thereby, as shown in FIG. 8, it adjusts so that the base | substrate 10 may follow a horizontal surface. 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、図１０～図１５は、同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を短縮させるように操作し、円筒部材のテーパー面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。最終的に、メインチャックカラー３２及び高摩擦部材３２ａによって、回転圧入杭Ｐを把持させる。 FIG. 9 is a process diagram showing a construction method of a rotary press-fit pile using the rotary press-fit pile construction apparatus of the embodiment of the present invention, and FIGS. 10 to 15 are process explanatory diagrams showing details of the construction method of the rotary press-fit pile. It is.
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 29a of the cylindrical member, that is, , Move so as to approach the rotary press-fit pile P. Finally, the rotary press-fit pile P is gripped by 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を把持させた状態で上部サブチャック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。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を短縮させ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、図３に示す回転機構３５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、海底地盤Ｇに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が加わるが、反力杭回転圧入装置１２によって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、基盤１０が海底地盤Ｇから離間するのを、また基盤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, the gripping of the rotary press-fitting pile P by the upper sub-chuck 40 and the lower sub-chuck 41 is released in a state where the rotary press-fitting pile P is gripped by the main chuck 22. 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 main chuck 22 is moved by the rotating mechanism 35 shown in FIG. 3. Rotate 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 by the seabed ground G. Thereby, the rotary press-fit pile P is rotationally press-fitted downward in the seabed ground G by a screw action (rotary press-fitting process).
At this time, a reaction force when the rotary press-fitting pile P is rotationally press-fitted is applied to the base 10, but the reaction force pile 45 rotationally press-fitted by the reaction force pile rotary press-fitting device 12 counters 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, and the base 10 is rotated in the direction opposite to the rotation of the rotary press-fit pile P. Each can be prevented.
　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ので、上部サブチャック４０の先端は、回転圧入杭Ｐの外周面上をローラーを介して転がりながら、当該回転圧入杭Ｐを把持する。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, because the upper sub chuck 40 is attached to the output side of the hydraulic cylinder 21, the upper sub chuck 40 is also raised integrally with the main chuck. Here, since the roller is attached to the portion that contacts the rotary press-fit pile P at the tip of the upper sub-chuck 40, the tip of the upper sub-chuck 40 rolls on the outer peripheral surface of the rotary press-fit pile P via the roller, The rotary press-fit pile P is gripped. 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, the chuck collar elevating cylinder 26 is operated to be shortened while the gripping of the rotary press-fit pile by the upper sub-chuck 40 and the lower sub-chuck 41 is continued, and the rotary press-fit pile P by the main chuck 22 is operated. Grip. 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).
Hereinafter, the rotary press-fitting pile P can reach the predetermined depth of the seabed ground G by repeatedly performing the rotary press-fitting 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を把持するので、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ときでも、また、回転圧入杭Ｐを斜めに傾斜した状態で回転圧入する場合であって、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-in pile P is not shifted from the construction device 1 of the rotary press-in pile. In other words, even when the construction site is the seabed G or the lakebed ground and is affected by tidal currents or water currents, or when the rotary press-in pile P is tilted obliquely, Even when a tilting moment due to its own weight acts on the pile P, it is possible to prevent the core of the rotary press-fit pile P 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, it is not necessary to remove the shackle from the rotary press-fit pile after construction, which is conventionally performed.
　以上、本発明の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を用いて海底地盤Ｇ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、上部サブチャック４０を昇降機構である油圧シリンダ２１の出力側に設けているが、これに限られることなく、上部サブチャック４０をフレームに取り付けても良い。この場合、上部サブチャック４０の先端に取り付けたローラーは不要になる。
　また、前記実施形態では、上部サブチャック４０と下部サブチャック４１を、メインチャック２２の上下にそれぞれ一段ずつ設けているが、これに限られることなく、それら上部サブチャック４０及び下部サブチャック４１を複数段設けても良い。
　また、前記実施形態では、上部サブチャック４０及び下部サブチャック４１を（油圧またはエアー）シリンダによって構成しているが、これに限られることなく、カメラの絞り機構のように、複数のリンクを組み合わせた構造のものでも良い。要は、盛り替え時のメインチャック２２による把持を解除したときに、回転圧入杭Ｐの芯が回転圧入杭の施工装置１の芯からずれないよう、回転圧入杭Ｐを支持できる構造であれば良い。 As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, in the said embodiment, although the example which rotationally press-fits the rotary press-in pile P to the seabed ground G using the construction apparatus 1 of the rotary press-fit pile was shown, it is not restricted to this, The rotary press-fit pile P to land on land The present invention can also be applied to the case where the rotary press-fitting is performed.
In the above embodiment, the upper sub chuck 40 is provided on the output side of the hydraulic cylinder 21 that is a lifting mechanism. However, the upper sub chuck 40 may be attached to the frame without being limited thereto. In this case, a roller attached to the tip of the upper sub chuck 40 is not necessary.
In the above embodiment, the upper sub-chuck 40 and the lower sub-chuck 41 are provided one step above and below the main chuck 22 respectively, but the upper sub-chuck 40 and the lower sub-chuck 41 are not limited to this. A plurality of stages may be provided.
In the above embodiment, the upper sub-chuck 40 and the lower sub-chuck 41 are configured by a (hydraulic or air) cylinder. However, the present invention is not limited to this, and a plurality of links can be combined like a diaphragm mechanism of a camera. It may be of a different structure. In short, as long as the structure of the rotary press-fit pile P is supported so that the core of the rotary press-fit pile P does not deviate from the core of the construction device 1 of the rotary press-fit pile when the grip by the main chuck 22 is released at the time of replacement. good.
　本発明の回転圧入杭の施工装置及び施工方法によれば、施工場所が海底地盤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ときでも、また、回転圧入杭を斜めに傾斜した状態で回転圧入する場合であって回転圧入杭に自重によるモーメントが作用する場合であっても、回転圧入杭の芯が施工装置の芯からずれるのを防止することができる。また、本発明の回転圧入杭の施工装置及び施工方法によれば、クレーンを用いて回転圧入杭を支持することなく回転圧入杭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からシャックルを取り外す手間が不要になる。従って、産業上の利用可能性を有する。 According to the rotary press-in pile construction apparatus and method of the present invention, even when the construction site is undersea ground or lake bottom ground and is affected by tidal current or water flow, the rotary press-in pile is inclined obliquely. Even if it is a case where it press-rotates in and it is a case where the moment by a dead weight acts on a rotary press-fit pile, it can prevent that the core of a rotary press-fit pile shifts from the core of a construction apparatus. Also, according to the rotary press-in pile construction device and method of the present invention, since the rotary press-in pile can be rotary press-in without supporting the rotary press-in pile using a crane, There is no need to remove the shackle from the rotary press-fit pile. Therefore, it has industrial applicability.
　１　回転圧入杭の施工装置　２　施工船　１０　基盤（フレーム）　１１　全旋回機　１２　反力杭回転圧入装置　２０　支柱（フレーム）　２１　油圧シリンダ（昇降機構）　２２　メインチャック　２４　水平下板　２５　水平上板　２６　チャックカラー昇降シリンダ　２９　円筒体　３０　カラー支持ブロック　３１　リンク　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　Ｐ　回転圧入杭　Ｐａ　螺旋羽根　Ｇ　海底地盤 DESCRIPTION OF SYMBOLS 1 Construction machine of rotary press-fit pile 2 Construction ship 10 Base (frame) 11 All-swivel machine 12 Reaction force pile rotary press-fitting device 20 Strut (frame) 21 Hydraulic cylinder (lifting mechanism) 22 Main chuck 24 Horizontal lower plate 25 Horizontal upper plate 26 Chuck collar lift cylinder 29 Cylinder 30 Collar support block 31 Link 32 Main chuck collar 35 Rotation mechanism 40 Upper sub-chuck 41 Lower sub-chuck 45 Reaction force pile 45a Spiral blade P P Rotary blade P spiral blade G Submarine ground

Claims (4)

  1. 　フレームと、
    　先端に螺旋羽根を有する回転圧入杭を把持可能なメインチャックと、
    　前記回転圧入杭を把持した状態で前記メインチャックを回転させる回転機構と、
    　前記フレームに取り付けられて、前記回転圧入杭に推進力を付与すべく、前記メインチャックを昇降自在に支持する昇降機構と、を備えた回転圧入杭の施工装置において、
    　前記フレームまたは前記昇降機構に、前記回転圧入杭を把持可能な上部サブチャックと下部サブチャックが、前記メインチャックの上側と下側に位置するように取り付けられた回転圧入杭の施工装置。     Frame,
    A main chuck capable of gripping a rotary press-fit pile having a spiral blade at the tip;
    A rotation mechanism for rotating the main chuck in a state of gripping the rotary press-fit pile;
    In the rotary press-in pile construction device, which is attached to the frame and includes an elevating mechanism that supports the main chuck so as to be raised and lowered in order to give a propulsive force to the rotary press-in pile.
    A rotary press-fitting pile construction apparatus in which an upper sub-chuck and a lower sub-chuck capable of gripping the rotary press-fitting pile are attached to the frame or the lifting mechanism so as to be positioned above and below the main chuck.
  2. 　前記上部サブチャックが前記昇降機構に取り付けられるとともに、前記下部サブチャックが前記フレームに取り付けられ、
    　前記上部サブチャックの先端の前記回転圧入杭に当接する部分に、ローラーが取り付けられた請求項１に記載の回転圧入杭の施工装置。     The upper sub chuck is attached to the lifting mechanism, and the lower sub chuck is attached to the frame,
    The rotary press-in pile construction device according to claim 1, wherein a roller is attached to a portion of the tip of the upper sub-chuck that contacts the rotary press-in pile.
  3. 　前記上部サブチャックまたは下部サブチャックは、それぞれ前記回転圧入杭に向かって伸縮する複数のシリンダにより構成されている請求項１または２に記載の回転圧入杭の施工装置。 The rotary press-fitting pile construction device according to claim 1 or 2, wherein the upper sub-chuck or the lower sub-chuck is configured by a plurality of cylinders that extend and contract toward the rotary press-fitting pile.
  4. 　請求項１～３のいずれか一項に記載の回転圧入杭の施工装置を用いた施工方法であって、
    　前記メインチャックにより前記回転圧入杭を把持させた状態で前記サブチャックによる前記回転圧入杭の把持を解除し、前記回転機構により前記メインチャックを回転させ、かつ、前記昇降機構により前記メインチャックを下降させて前記回転圧入杭を地盤に回転圧入させる回転圧入工程と、
    　前記上部サブチャックおよび前記下部チャックにより前記回転圧入杭を把持させた状態で、前記メインチャックによる前記回転圧入杭の把持を解除し、前記昇降機構により前記メインチャックを上昇させ、その後前記メインチャックにより前記回転圧入杭を把持させる盛り替え工程とを備え、
    　前記回転圧入工程と前記盛り替え工程とを交互に繰り返し行なうことで、前記回転圧入杭を地盤の所定深さまで回転圧入する回転圧入杭の施工方法。     A construction method using the rotary press-fit pile construction device according to any one of claims 1 to 3,
    The gripping of the rotary press-fitting pile by the sub chuck is released in a state where the rotary press-fitting pile is gripped by the main chuck, the main chuck is rotated by the rotating mechanism, and the main chuck is lowered by the lifting mechanism A rotary press-fitting step of rotating the press-fitted pile into the ground,
    In a state where the rotary press-fit pile is gripped by the upper sub chuck and the lower chuck, the grip of the rotary press-fit pile by the main chuck is released, the main chuck is raised by the lifting mechanism, and then the main chuck is used. A refilling step for gripping the rotary press-fit pile,
    The construction method of the rotary press-fit pile which press-rotates the rotary press-fit pile to the predetermined depth of the ground by repeating the rotary press-fit process and the refilling process alternately.
PCT/JP2013/081376 2012-12-28 2013-11-21 Construction method and construction device for rotary press-in pile WO2014103576A1 (en)

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CN105484263B (en) * 2015-11-29 2017-04-19 江山显进机电科技服务有限公司 Pile delivery mechanism of pile embedding machine
CN106049494A (en) * 2016-07-15 2016-10-26 广州市维众建筑工程有限公司 Separated-type pile pressing-in machine
CN106049494B (en) * 2016-07-15 2019-02-15 广州市维众建筑工程有限公司 Split type pile press machine
CN115142415A (en) * 2022-07-14 2022-10-04 中煤东方市政建设集团有限公司 Continuous press-in type static pile press
CN115142415B (en) * 2022-07-14 2024-03-26 中煤东方生态建设集团有限公司 Continuous pressing-in type static pile pressing machine

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