JP6027888B2 - Rotary press-in pile construction equipment and construction method - Google Patents

Description

  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.

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 applied to the rotary press-in 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.

JP 2001-146744 A

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. However, when the construction site is undersea or lake bottom, the rotary indentation pile is affected horizontally by the tidal current and the water flow in the lake. As a result, the core of the rotary press-fit pile is displaced from the core of the construction device, and there is a problem that the construction cannot be performed well.
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 inclined not diagonally but obliquely, so that a moment acts on the rotary press-fit pile, resulting in misalignment of the rotary press-fit pile with respect to the construction device.

  In addition, when the construction site is the seabed ground or lake bottom ground, when the rotary press pile is suspended by a crane, a shackle is attached to the upper end of the rotary press fit pile, and the sling that extends from the attached shackle and the tip of the crane And was connected to. After construction, the shackle is removed from the rotary press-fit pile and the sling is recovered. However, in the construction at a deep water depth, there is a problem that it is difficult to remove the shackle because divers cannot dive.

  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 present invention employs the following means in order to solve the above problems.
That is, the invention of claim 1 includes a frame, a main chuck rotation pressed pile Ru is detachably grip having a helical blade at the tip, a rotating mechanism for rotating the main chuck while holding the rotary press fit pile In the rotary press-in pile construction apparatus, the lift or the lift mechanism, which is attached to the frame and supports the main chuck so that the main chuck can be moved up and down to give a propulsive force to the rotary press-in pile. to the removably upper sub-chuck and the lower sub-chuck Ru by gripping the rotating press-pile, characterized in that it mounted so as to be positioned on the upper side and lower side of the main chuck.

  According to the first aspect of 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 moved by the lifting mechanism. By lowering, the rotary press-fitting pile is 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 by repeatedly performing both the above steps.

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.

In the invention of claim 2, the upper sub-chuck is attached to the elevating mechanism, the lower sub-chuck is attached to the frame, and a roller is attached to a portion of the tip of the upper sub-chuck that contacts the rotary press-fitting pile. It is characterized by that.
According to the second aspect of the present invention, when the main chuck is lifted by the lifting mechanism in the refilling process, the rotary press-fit pile remains maintained in height because the upper sub-chuck is attached to the lifting mechanism. The upper sub chuck is raised 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.

The invention of claim 3, wherein the upper sub-chuck or the lower sub-chuck is characterized by being composed of a plurality of cylinders directed respectively towards the rotary press fit pile.
According to the third aspect of the present invention, the upper sub-chuck or the lower sub-chuck can be easily held and released from the rotary press-fitting pile by extending and compressing 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.

Invention of Claim 4 is the construction method using the construction apparatus of the rotary press-fit pile as described in any one of Claims 1-3, Comprising: In the state which made the said rotary press-fit pile grip the said main chuck | zipper , The gripping of the rotary press-fit pile by the upper sub-chuck and the lower sub-chuck is released, the main chuck is rotated by the rotary mechanism, and the main chuck is lowered by the lifting mechanism to bring the rotary press-fit pile to the ground a rotary press fit step of rotating pressed, in a state in which said by the upper sub-chuck and the lower sub-chuck is gripping the rotary press fit pile, to release the grip of the rotary press fit pile by the main chuck, the main chuck by the elevating mechanism is raised, after which a prime replacement step of gripping the rotating press-pile by the main chuck, the rotary By repeating the above prime sort step and entering step alternately, characterized by rotating pressed the rotary press fit pile to a predetermined depth.

  According to the invention of claim 4, like the invention according to claim 1, 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.

According to the invention of claim 1, even when the construction site is the seabed ground or the lakebed ground and is affected by tidal currents or water currents, it is also the case where the rotary press-in piles are rotationally press-fitted while being inclined obliquely. Thus, even when a moment due to its own weight acts on the rotary press-fit 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.

  According to the invention of claim 2, when the upper sub-chuck is lifted integrally with the main chuck by the lifting mechanism, the upper sub-chuck grips the rotary press-fit pile while changing the contact position with respect to the rotary press-fit pile. Can be made.

  According to the invention of claim 3, with a simple configuration, the upper sub-chuck or the lower sub-chuck can be easily grasped and released from the rotary press-fitting pile, and high reliability can be obtained.

  According to the invention of claim 4, as in the invention of claim 1, it is possible to prevent the core of the rotary press-fit pile from being displaced from the core of the construction apparatus.

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. It is a perspective view which shows the whole construction apparatus. It is sectional drawing which shows the principal part of the construction apparatus of the rotary press-fit pile of embodiment of this invention. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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.

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 V-V in FIG.

In FIG. 1, reference numeral 1 denotes a rotary press-in pile construction device, and this rotary press-in pile construction device 1 press-fits a rotary press-pile pile P having a spiral blade Pa at its tip while rotating it on the ground (see FIG. 1). 3).
In this embodiment, it is an example in the case of rotationally press-fitting rotary press-fit piles P into the seabed ground G. Here, the rotary press-in pile construction device 1 is connected via a rope 4 by a crane 3 mounted on a construction ship 2. Can be suspended in the sea.
The rotary press-in pile construction device 1 includes a base 10, an all-swivel machine 11 that is attached to the center of the base 10 and press-fits the rotary press-in pile P into the submarine ground G, and the base 10 into the submarine ground G. A reaction force pile rotary press-fitting device that rotates and presses a reaction force pile 45 into the submarine ground G when the rotary press-fit pile P is rotationally press-fitted into the submarine ground G by being fixed at a predetermined position. 12. A plurality of pressure pile rotation press-fitting devices 12 are attached to the periphery of the base 10 (for example, four around the entire turning machine 11) every 90 degrees in the circumferential direction.

  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 with the construction ship 2 of the construction apparatus 1 of the rotary press-fit pile is grasped, and the accurate position information of the construction apparatus 1 of the rotary press-fit pile is coupled with the GPS device 13 provided in the construction ship 2. Can be grasped.

  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 10 a for inserting a rotary press-fit pile P in 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 such as a hydraulic cylinder 21 that supports the main chuck 22 so as to be movable up and down is attached to the support column 20, and a main chuck 22 that removably holds the rotary press-fit pile P is attached to the output side base 21 </ b> A of these hydraulic cylinders 21. It is attached to be rotatable through.

The main chuck 22 includes a ring-shaped horizontal lower plate 24 rotatably attached via the bearing 23, and a ring-shaped horizontal upper plate 25 disposed on the upper side of the horizontal upper plate. The horizontal upper plate 25 is rotatably supported by 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 elevable.
A cylindrical body 29 is attached to the upper side of the horizontal lower plate 24, and a tapered surface 29a 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 on the lower side of the horizontal upper plate 25 so as to extend radially from the center of the horizontal upper plate 25, and the color support blocks 30 are respectively linked via the links 31. It is attached so as to be able to rotate along the vertical plane so as to be located on the center side of the horizontal upper plate 25 (the side where the rotary pressure pile P is disposed) from directly below the support position. 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. A main chuck collar 32 is attached to the inner side of the collar support block 30 (on the side facing the rotary press-fitting pile P), and a plurality of high friction members 32a are spaced further in the vertical direction inside the main chuck collar 32. Open and installed.

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 inward in the radial direction of the horizontal upper plate 25. Therefore, 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 replaced with a high friction member. Grasp through 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. Accordingly, the main chuck collar 32 attached to the collar support block 30 is also moved integrally with the collar support block 30 to the outside in the same radial direction, and the grip on the rotary press-fit pile P is released.
That is, in the main chuck 22, the rotary press-fit pile P can be gripped and released by the main chuck collar 32 when the chuck collar lifting cylinder 26 is shortened or extended.

  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 outward in the radial direction of the horizontal upper plate 25 by its own weight. Instead, the collar support block 30 is moved by the spring (not shown) to the horizontal upper plate 25. A configuration may be adopted in which the urging is performed so as to move outward in the radial direction.

  A rotation mechanism 35 that rotates the main chuck 22 while holding the rotary press-fitting pile P is provided between the main chuck 22 and the frame such as the support column 20 or the hydraulic cylinder 21. 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 configured to be 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. The upper sub-chuck 40 is radially attached to the upper end of the hydraulic cylinder, centering on 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 or the lower sub chuck 41 is constituted by, for example, a hydraulic cylinder or an air cylinder.
In addition, at the inner end of the upper sub-chuck 40, that is, the end facing the rotary press-fitting pile to be gripped, a roller that allows the rotary press-fitting pile P to move up and down at the same time while holding the rotary press-fitted pile. It is attached.

  The reaction force pile rotary press-fitting device 12 has basically the same configuration as the all-swivel machine 11 except that it does not have an upper sub chuck and a lower sub chuck, and rotates the main chuck and the main chuck. The rotating mechanism and the lifting mechanism for raising and lowering the main chuck are each smaller than that of the all-swivel machine 11 described above, and the target to be rotationally pressed by the fixing mechanism 12 has a spiral blade 45a at the tip. 45 (small rotary press-fit pile).

Next, a construction method for rotationally press-fitting a rotary press-fit pile into the seabed ground G using the rotary press-fit pile construction apparatus 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 vessel 2 reaches a predetermined position on the sea, the crane 3 mounted on the construction vessel 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.

  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.

  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.

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 base 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 as shown in FIGS. 6 and 7, the reaction force pile 45 is rotationally press-fitted to a predetermined depth in the submarine ground G and then mounted in advance on the base 10. The relative height position (depth position) of the reaction force pile 45 with respect to the base 10 is adjusted by the lifting mechanism incorporated in the reaction force pile rotary press-fitting device 12 based on the inclination information emitted from the level. To do. 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.

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 views 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 shortened, and the collar support block 30 is inserted into the center side of the horizontal upper plate 25 via the tapered surface 29a of the cylindrical member, that is, rotational press-fitting. The pile is moved so as to approach the pile P, and finally the rotary press-fit pile P is gripped through the main chuck collar 32 and the high friction member 32a.

In this manner, 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 held by the main chuck 22, and as shown in FIG. The hydraulic cylinder 21 is shortened to apply a downward pressing force to the rotary press-fit pile P, and the main chuck 22 is rotated in a predetermined direction by the rotation mechanism 35. Then, when the spiral blade 45a attached to the tip of the rotary press-in pile P is pressed downward and rotated in a predetermined direction, the rotary press-in pile P is rotary press-fitted downward in the seabed ground G by its 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, it is possible to prevent the base 10 from being separated from the seabed ground G and rotating in the direction opposite to the rotation of the rotary press-fit pile P, respectively. it can.

  When the shortening limit position by the hydraulic cylinder 21 is reached, the shortening operation of the hydraulic cylinder 21 is stopped and simultaneously the rotation 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 extended to release the grip of the rotary press-fit pile P by the main chuck 22.

Next, as shown in FIG. 14, the hydraulic cylinder 21 is extended 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 while The rotary press-fit pile P will be 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.

After moving the main chuck 22 to the upper limit position, the hydraulic cylinder 21 is stopped. Then, as shown in FIG. 15, while the gripping of the rotary press-fit pile by the upper sub-chuck 40 and the lower sub-chuck 41 is continued, the chuck collar elevating cylinder 26 is shortened to grip the rotary press-fit pile P by the main chuck 22. Do. 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 be reached to a predetermined depth by repeatedly performing the rotary press-fitting step shown in FIGS. 10 and 11 and the refilling step shown in FIGS.

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.

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 a rotary press-fit pile 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 is put on the ground of land. The present invention can be applied even when rotational press-fitting.
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 are provided on the upper and lower sides of the main chuck 22, respectively. However, the present invention is not limited to this, and the upper sub-chuck 40 and the lower sub-chuck are provided in a plurality of stages. It 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. The key is to support the rotary press-fit pile P so that the rotary press-fit pile P does not deviate from the core of the rotary press-in pile construction device 1 when the gripping by the main chuck 22 at the time of replacement is released. Any structure can be used.

1 Construction equipment for rotary press-fit piles 2 Construction ship 10 Base (frame)
11 Total turning machine 12 Reaction force pile rotary press-fitting device 20 Strut (frame)
21 Hydraulic cylinder (elevating mechanism)
22 Main chuck 24 Horizontal lower plate 25 Horizontal upper plate 26 Chuck collar elevating cylinder 29 Cylindrical body 30 Color support block 31 Link 32 Main chuck collar 35 Rotating mechanism 40 Upper sub chuck 41 Lower sub chuck 45 Reaction force pile 45a Spiral blade
P Rotating press pile Pa Spiral blade
G submarine ground

Claims (4)

Frame,
A main chuck for detachably holding 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.
The rotary press-fit pile, wherein an upper sub-chuck and a lower sub-chuck for detachably gripping the rotary press-fit pile are attached to the frame or the lifting mechanism so as to be positioned on the upper side and the lower side of the main chuck. Construction equipment. Attaching the upper sub chuck to the lifting mechanism and attaching the lower sub chuck 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. The upper sub-chuck or the lower sub-chuck, construction of a rotary press fit pile according to claim 1 or 2, characterized in that it is composed of a plurality of cylinders directed respectively towards the rotary press fit pile. It is the construction method using the construction device of the rotation press pile according to any one of claims 1 to 3 ,
The gripping of the rotary press-fitting pile by the upper sub-chuck and the lower sub-chuck is released while the rotary press-fitting pile is gripped by the main chuck, the main chuck is rotated by the rotary mechanism, and the lifting mechanism A rotary press-fitting step of lowering the main chuck and rotating the press-fitting pile into the ground.
Wherein the upper sub-chuck and conditions said by the lower sub-chuck is gripping the rotary press fit pile, said releasing the grip of the rotary press fit piles by the main chuck, raising the main chuck by the lifting mechanism, then, the main A refilling step of gripping the rotary press-fitting pile with a chuck,
A method for constructing a rotary press-fit pile, wherein the rotary press-fit pile is rotationally press-fitted to a predetermined depth by alternately performing the rotary press-fit step and the refilling step.

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