JP2004027548A - Pile driving guide and pile driving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pile driving guide and a pile driving method easy in positioning work, and capable of driving piles even at a height restricted job site and smoothly performing pile-driving by a hydraulic hammer when driving a plurality of piles in the sea bottom. <P>SOLUTION: This driving guide 2 of the pile 4 is placed on a barge 1 for driving the cylindrical or columnar pile 4 in the water bottom. This driving guide 2 is a frame body for freely moving in parallel and rotating on the barge 1. A plurality of gripping mechanisms 3 extend from a prescribed place so as to face a water surface from the peripheral edge of this driving guide 2. These gripping mechanisms 3 can vertically grip the pile 4 to the water surface. The pile driving guide 2 is characterized by releasing and guiding the pile 4 at driving time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a driving guide for driving a pile and a method of driving a pile in water construction.
[0002]
[Prior art]
In the civil engineering work on water in a port or the like, an operation of hitting a pile on the seabed is often performed. In the pile driving work on the seabed, an openable pile driving guide is installed on a pile driving boat or a crane ship with a pile driving leader, and driving with a hammer is performed while positioning one by one. Hereinafter, a stakeout ship and a crane ship to which a stakeout guide is attached are referred to as “barges”.
[0003]
When the pile head is located underwater, driving is performed by using a yatco (a temporary joining material between the pile and the hammer) under the hammer, or by using a hydraulic hammer that can operate even in water.
[0004]
[Problems to be solved by the invention]
In the conventional method, a pile driving leader or an opening / closing type pile driving guide for guiding the pile was moved for each barge for each pile, and fine adjustment of the pile driving position was performed. There is a problem that it takes a long time to determine the hitting position.
[0005]
In general, only one pile is installed, and a plurality of piles are installed at a predetermined interval. Therefore, it takes a long time to position the pile driving, which significantly reduces the efficiency of the entire construction. .
Further, in the case of a pile whose pile head is located in the water, since the pile driving position accuracy is particularly required, measures such as installing an underwater guide have been required.
[0006]
In addition, at sites with height restrictions, the number of connecting piles increases because the suspension wire and the crane head may exceed the height limit when inserting the piles into the retractable pile driving guide. There was a problem of doing.
[0007]
The present invention has been made in view of these problems, and when placing a plurality of piles on the seabed, the positioning work is easy, and the number of joint piles can be reduced even at a site where height is limited. It is an object of the present invention to provide a pile driving guide and a method of driving a pile, in which pile driving by a hydraulic hammer can be smoothly performed.
[0008]
[Means for Solving the Problems]
The present invention is configured as follows in order to solve the above problems.
The invention according to claim 1 is a driving guide for a pile mounted on a barge for driving a plurality of piles on a water bottom, and the driving guide is capable of parallel movement and rotation on the barge. It is a free frame body, from the periphery of this driving guide, a plurality of gripping mechanisms extend toward the water surface, the gripping mechanism grips the plurality of piles, and guides the piles during the driving. It is a pile driving guide characterized by the following.
[0009]
According to the first aspect of the present invention, the driving guide is a frame-shaped frame body mounted on a barge, and a predetermined position on the periphery of the driving guide has a grip for gripping a pile. A plurality of mechanisms are provided. As a result, even when piles cannot be erected at the work site due to height restrictions, the piles can be gripped by the gripping mechanism in sea areas where there is no height restriction, and barges can be operated while holding the piles. Since it can be towed to the site, it is possible to perform the pile driving work smoothly.
[0010]
In addition, by moving and moving the placement guide in parallel on the barge while holding the plurality of piles, the plurality of piles held by the holding mechanism can be moved while maintaining the relative positional relationship. Therefore, positioning can be completed for a plurality of piles at once, and it is not necessary to perform positioning for each pile.
[0011]
According to a second aspect of the present invention, the gripping mechanism includes a gripping pad capable of gripping a side surface of the stake, and a pair of inferior arc-shaped arms from which the gripping pad projects, and the pair of arms are formed by the driving. 2. The gripping pad is supported by a guide via a rotating shaft so as to be openable and closable, and the gripping pad grips a side surface of the pile by making a protrusion amount from an inner peripheral surface of an arm variable. It is a setting guide of the described pile.
[0012]
According to the second aspect of the invention, the pair of inferiorly arcuate arms have their distal ends pivotally supported by the driving guide via the pivot shaft. These arms are openable and closable about this rotation axis as a center of rotation. When the arms are open (open state), the distance between the ends of the arms is larger than the diameter of the piles. Can be introduced. When the arm is closed (closed state), the distance between the ends of the arm is smaller than the diameter of the pile, and the pile can be loosely held between the arms.
[0013]
A grip pad for gripping the pile protrudes from the arm toward the side of the pile.After closing the arm, the pile is gripped or released by changing the amount of protrusion of the grip pad. Or you can. That is, the pile is gripped by maximizing the protrusion amount of the grip pad, and released by reducing the protrusion amount. The opening and closing of the arm is performed by a telescopic mechanism such as a hydraulic jack interposed between the arm and the driving guide.
The gripping pad is formed of a hydraulic cylinder or the like, and changes the amount of protrusion of the gripping pad by expanding and contracting the hydraulic cylinder.
[0014]
The invention according to claim 3, wherein the gripping mechanism is supported by the driving guide via a tilting device, and the tilting device is supported by the driving guide via a tilting shaft, 3. The driving guide according to claim 2, wherein the tilting device is tilted about the tilt axis so that the gripping mechanism can be held in an inclined state.
[0015]
According to the third aspect of the present invention, since the tilting device that supports the gripping mechanism is supported by the driving guide via the tilting shaft, the tilting device can be tilted about the tilting shaft. The holding mechanism in the horizontal state can be inclined.
[0016]
The height of the pile head and the crane head can be made lower than that when the pile is held vertically by holding the pile by the gripping mechanism that has been tilted by the tilting device. it can. Thereby, in a work site with a height limitation, after holding the pile with the gripping mechanism in an inclined state, the tilting device is tilted, and the pile is vertically erected by setting the gripping mechanism in a horizontal state. . Therefore, the pile can be erected on the work site where the height is limited.
[0017]
The invention according to claim 4 is characterized in that a guide roller for contacting the side surface of the pile and guiding the pile in the closed state is provided on the inner peripheral surface. Or a pile driving guide according to claim 3.
[0018]
According to the fourth aspect of the present invention, the guide roller that is in contact with the side surface of the pile when the arm is closed (closed state) is provided on the inner peripheral surface of the arm.
In the pile driving process, when the pile head is at a position higher than the water surface, the gripping mechanism is in a state in which the arm is closed, the gripping pad has a reduced amount of protrusion, and the pile is separated. In this state, the guide roller contacts the side surface of the pile and guides the pile, so that the pile is driven in the correct direction.
[0019]
According to a fifth aspect of the present invention, there is provided a method of driving a pile using the pile driving guide according to any one of the first to fourth aspects, wherein the tilting device is tilted and the gripping is performed. Inclining a mechanism, bringing the pair of arms into the open state, introducing the pile between the pair of arms, bringing the pair of arms into the closed state, and setting the amount of protrusion of the grip pad to Step of gripping the pile by maximizing, tilting the tilting device, vertically erecting the pile gripped by the gripping pad, and translating the driving guide on the barge and A step of positioning the pile by rotating, minimizing the amount of protrusion of the gripping pad, opening the pile, and placing the pile in air, and setting the pair of arms to the open state. Submerge the hammer in the water and strike the pile A step of a striking 設方 method of piles having a.
[0020]
According to the invention as set forth in claim 5, in a site having a height restriction, after the gripping mechanism is tilted and the pile is gripped, the pile can be set up vertically with the gripping mechanism horizontal. The pile can be erected and the pile can be driven without the head or crane head exceeding the height limit.
[0021]
Further, if the driving guide of the present invention utilizes the fact that a plurality of piles can be gripped, the driving guide is placed after the pile is gripped by the driving guide in a predetermined sea area outside the work site. By towing the barge to the work site, piles can be driven even at sites where the height is limited.
[0022]
In addition, since the driving guide is translated and rotated on the barge while finely adjusting the pile driving position while holding the plural piles, positioning is performed while maintaining the relative positional relationship of the plural piles. This makes it unnecessary to perform positioning for each pile.
[0023]
Furthermore, if the arms are opened when placing a pile underwater, the distance between the arms is increased, so that when the underwater pile driving hammer (hydraulic hammer) passes between the arms, the hammer and the hammer are disengaged. Pile driving can be performed without interference (contact) with the arm.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate.
The driving guide of the present invention will be outlined with reference to FIGS.
The casting guide 2 of the present invention is used by being placed on the barge 1. The casting guide 2 is placed on the work surface of the barge 1 and projects outward (seaward) from the inner frame 2 a, which is a frame having substantially the same shape as the work surface, and from the work surfaces on both sides of the barge 1. The outer frame 2b, which is a frame body, is integrally formed.
[0025]
The gripping mechanism 3 for gripping the stake 4 and the tilting device 6 for tilting the gripping mechanism 3 are provided at three locations at equal intervals along the longitudinal direction of the outer frames 2b on both sides. The gripping mechanism 3 is installed so as to face the water surface from the outer frame 2b toward the outside (sea side).
[0026]
In FIGS. 1 and 2, these six gripping mechanisms 3 are all closed, and the pile 4 is gripped by the gripping mechanism 3.
Further, in order to translate and rotate the driving guide 2 on the work surface of the barge 1, the edge of the driving guide 2 is connected to the work surface of the barge 1 via hydraulic jacks 7a and 7b. I have.
[0027]
Spats 1a are provided at four corners of the barge 1, and when the piles are driven, these spats 1a are grounded to the seabed, and the barge 1 can be fixed at a predetermined position. A crawler crane 5 is mounted on the work surface of the barge 1 for suspending the pile 4 to be gripped by the gripping mechanism 3 and suspending various hammers for pile driving.
[0028]
Next, with reference to FIG. 3, the movement of the casting guide 2 on the barge 1 will be described.
When driving the pile 4, the barge 1 is first fixed near the pile driving position by the spat 1a, and then the hydraulic jacks 7a and 7b are appropriately expanded and contracted to move the driving guide 2 on the work surface. By performing parallel movement and rotation, the pile driving position is finely adjusted and the pile 4 is driven.
[0029]
FIG. 3A is a schematic view showing a state in which the casting guide 2 is translated on the barge 1 in the left direction in the drawing. By shrinking the hydraulic jacks 7a and 7b by the same amount, the entire driving guide 2 is moved leftward in the drawing.
[0030]
FIG. 3B is a schematic view showing a state where the casting guide 2 is rotated counterclockwise on the barge 1. By contracting the hydraulic jack 7a and extending the hydraulic jack 7b, the casting guide 2 is rotated counterclockwise on the barge 1.
[0031]
As described above, the casting guide 2 of the present invention can freely move in parallel and rotate on the barge 1 by appropriately expanding and contracting the hydraulic jacks 7a and 7b. If it is fixed in the vicinity, the pile driving position can be determined by appropriately moving the driving guide 2 on the barge 1 thereafter. As described above, the driving guide 2 of the present invention holds the plurality of piles 4 while maintaining the relative positional relationship. Since the pile driving position of the pile 4 is determined, the time required for positioning can be shortened.
[0032]
Next, details of the tilting device 6 will be described with reference to FIGS.
FIG. 4A is a front view of the gripping mechanism 3 and the tilting device 6 in a state where the pile 4 is gripped, and FIG. 4B is a side view of FIG.
[0033]
The tilting device 6 is for tilting a gripping mechanism 3 to be described later. A tilting shaft 6d for supporting the gripping mechanism 3 to be attached to the outer frame 2b of the driving guide 2 is provided. , 6 d, a tilting arm 6 b, which is a columnar member that stands upright from the support portion 6 a, and a portion between the vicinity of the tip of the tilting arm 6 b and the inner frame 2 a of the driving guide 2, and connects the tilting arm 6 b. A tilting cylinder 6c that rotates about the tilting shafts 6d, 6d.
[0034]
Next, the operation of the tilting device 6 will be described with reference to FIG. In FIG. 5, a virtual line indicates a state in which the gripping mechanism 3 is kept horizontal by the tilting device 6 (horizontal state), and a solid line indicates a state in which the gripping mechanism is tilted by the tilting device 6 (tilted state). I have.
In the tilting state, in the tilting device 6, the tilting cylinder 6c formed of a hydraulic cylinder or the like expands and contracts, and the tilting arm 6b is fixed by predetermined rotation about the tilting shafts 6d, 6d. And keep it inclined.
[0035]
The change from the inclined state to the horizontal state is performed by extending the tilt cylinder 6c. By extending the tilting cylinder 6c, the gripping mechanism 3 rotates while gripping the pile 4, and becomes a horizontal state in which the pile 4 stands upright.
[0036]
As described above, the driving guide 2 of the present invention can set the gripping mechanism 3 in a state where the pile 4 is tilted since the gripping mechanism 3 can grip the pile 4 even in the inclined state, and then operates the tilting device 6. Then, by making the gripping mechanism 3 horizontal, the pile 4 can be erected vertically. Therefore, the height of the pile head (the tip of the pile 4) and the head of the crawler crane 5 during the operation can be kept lower than in the case where the pile 4 is set on the gripping mechanism 3 in a state of standing upright. Even in a limited site, the pile 4 can be erected on the site.
[0037]
Subsequently, details of the gripping mechanism 3 will be described with reference to FIG.
Referring to FIGS. 4A and 4B, the gripping mechanism 3 includes a base 10 extending from the support 6a of the tilting device 6, and rotating shafts 11a and 11b provided at both ends of the base 10. The first arm 12a and the second arm 12b, each of which rotates about the center of rotation, and two gripping pads provided on each of the first arm 12a and the second arm 12b and protruding toward the center of the pile 4 13 and on the inner peripheral surface of the first arm 12a and the second arm 12b corresponding to the position where the gripping pad 13 is installed, and when the first arm 12a and the second arm 12b are closed, the pile 4 A guide roller 15 for guiding the pile 4 in contact with the side surface, a hydraulic jack 14a interposed between the first arm 12a and the support portion 6a for opening and closing the first arm 12a, and a support for the second arm 12b. With the part 6a It is interposed comprising a hydraulic jack 14b for opening and closing the second arm 12b.
The gripping pad 13 includes a pad portion 13a for gripping the side surface of the pile 4 and a cylinder portion 13b formed of a hydraulic cylinder or the like for supporting the pad portion 13a and changing the amount of protrusion of the pad portion 13a.
[0038]
Subsequently, the operation of the gripping mechanism 3 will be described with reference to FIGS. FIG. 4 shows a state where the gripping mechanism 3 grips the pile 4. This state is a state that the gripping mechanism 3 takes before the pile 4 is driven, for example, during towing of the barge 1 while gripping the pile 4 or during positioning of the pile driving position. Hereinafter, this state is referred to as a “grasping state”.
[0039]
In the gripping state, the first and second arms 12a and 12b are turned around the turning shafts 11a and 11b to be in a closed state (closed state) when the hydraulic jacks 14a and 14b are extended. . Further, in the gripping pad 13, the protrusion amount of the cylinder portion 13 b is maximized, and the pad portion 13 a is strongly pressed against the side surface of the pile 4 and grips the pile 4.
[0040]
In the gripping state, the distance between the tips of the first and second arms 12a and 12b is smaller than the diameter of the pile 4, and the pile 4 is inadvertently moved from between the first and second arms 12a and 12b. 4 is prevented from coming off.
[0041]
FIG. 6 shows a state in which the first and second arms 12a and 12b are in the closed state, and the grip pad 13 has separated the side surface of the pile 4. This state is a state that the gripping mechanism 3 takes when driving the pile 4 existing in the atmosphere (the pile head is not in the water). Hereinafter, this state is referred to as a “primary release state”.
[0042]
In the primary release state, the first and second arms 12a and 12b are closed around the rotary shafts 11a and 11b as the hydraulic jacks 14a and 14b are extended (closed state). ). Further, in the gripping pad 13, the protrusion amount of the cylinder portion 13b is reduced, and the pad portion 13a releases the side surface of the pile 4 and releases the pile 4. In the first release state, the guide roller 15 is in contact with the side surface of the pile 4 and guides the pile 4 in a correct driving direction. Therefore, even if the seabed for driving is inclined, The pile 4 is driven into the seabed while maintaining the vertical.
[0043]
FIG. 7 shows a state in which the first and second arms 12a and 12b are in the open state, and the amount of protrusion of the gripping pad 13 is minimized. This state is a state that the gripping mechanism 3 takes when setting the pile 4 on the gripping mechanism 3 or when driving the pile 4 whose pile head is underwater with a hydraulic hammer or the like. Hereinafter, this state is referred to as a “secondary open state”.
[0044]
In the secondary open state, the first and second arms 12a and 12b are opened by pivoting about the pivot shafts 11a and 11b by the contraction of the hydraulic jacks 14a and 14b (open state). It becomes. In the gripping pad 13, the protrusion amount of the cylinder portion 13b is minimum.
[0045]
In the secondary open state, the distance between the distal ends of the first and second arms 12a and 12b is larger than the diameter of the pile 4, and the pile 4 is gripped from between the distal ends of the arms 12a and 12b. It can be introduced and gripped inside the mechanism 3.
Further, in this state, since the distance between the arms 12a and 12b is increased, the hydraulic hammer for driving underwater piles having a diameter larger than the pile 4 does not interfere (contact) with the arms 12a and 12b. It is possible to pass between the arms 12a and 12b, and the stakeout underwater can be performed smoothly.
[0046]
Next, a method of driving the pile 4 according to the present invention will be described with reference to FIGS. 8 and 9 are flowcharts showing the flow of the method for driving the pile 4 of the present invention. Note that these flowcharts are based on the assumption of a work at a pile driving site with a height restriction. 10 and 11 are process diagrams of a method for driving the pile 4.
[0047]
The method of placing the pile 4 is divided into two flows depending on whether the pile 4 is vertically gripped by the gripping mechanism 3 or gripped by the gripping mechanism 3 while being inclined.
[0048]
First, a case where the pile 4 is gripped vertically will be described with reference to FIG.
First, a predetermined number of piles 4 are gripped by the gripping mechanism 3 in a temporary yard having no height limitation (S1). That is, in S1, the gripping mechanism 3 is set to the secondary open state, and the pile 4 suspended by the crawler crane 5 or the like is inserted between the arms 12a and 12b, and then the gripping mechanism 3 is set to the gripping state. Then, the pile 4 is gripped by the gripping mechanism 3. Subsequently, the barge 1 is towed to the casting site with the pile 4 held by the holding mechanism 3 (S2).
[0049]
FIG. 10A shows a work process diagram of S1 and S2. The pile 4 on the right side of the drawing is gripped by the gripping mechanism 3. The pile 4 on the left side of the drawing is suspended by a crawler crane 5 and is about to be gripped by the gripping mechanism 3. When all the piles 4 are gripped by the gripping mechanism 3, the barge 1 is towed from the temporary yard to the setting site.
[0050]
Next, at the casting site, the spat 1a is lowered from the barge 1 to the seabed, and the barge 1 is fixed near the casting location (S3). Subsequently, the pile driving position is finely adjusted by translating and rotating the driving guide 2 on the barge 1 by the hydraulic jacks 7a and 7b (S4).
[0051]
Subsequently, the upper end of the pile 4 is gripped by the vibratory hammer suspended and supported by the crawler crane 5 (S5). Then, by shifting the gripping mechanism 3 from the gripping state to the primary open state, the gripping pad 13 is separated from the side surface of the pile 4 and is gradually lowered to the water bottom while the pile 4 is guided by the guide rollers 15 (S6). ). When the pile 4 reaches the bottom of the water, the vibratory hammer is operated to drive the pile 4 (S7).
[0052]
FIG. 10B shows the operation steps S3 to S7. The spat 1a is lowered to the bottom of the water from the barge 1, and the barge 1 is fixed near the casting location. On the left side of the drawing, the upper end of the pile 4 is gripped by a vibratory hammer suspended from a crawler crane 5. In this state, since the gripping mechanism 3 is in the primary open state, when the vibratory hammer is lowered, the pile 4 is guided by the guide rollers 15 and vertically descends toward the water bottom by its own weight. When the pile 4 reaches the water bottom, the driving by the vibro hammer is started. The right side of the drawing shows a state where the driving of the pile 4 by the vibratory hammer has progressed to some extent, and the vibratory hammer has descended to the vicinity of the gripping mechanism 3.
[0053]
Next, when the driving by the vibratory hammer advances and the vibratory hammer descends to the vicinity of the gripping mechanism 3, the hammer chuck is opened and the vibratory hammer is removed (S8), and the hydraulic hammer capable of driving underwater is replaced (S8). S9). Subsequently, the gripping mechanism 3 is set to the second open state so that the gap between the arms 12a and 12b is widened so that the hydraulic hammer having a diameter larger than the pile 4 does not interfere (contact) with the gripping mechanism 3 when the hydraulic hammer passes. S10). Thereafter, the pile 4 is driven by the hydraulic hammer until the pile reaches a predetermined design height below the water surface, and the pile driving operation is completed (S11, S12).
[0054]
FIG. 10C shows the operation steps from S8 to S12. On the right side of the drawing of FIG. 10C, the vibratory hammer has descended to the vicinity of the gripping mechanism 3, but in this state, the hammer chuck is opened and the vibratory hammer is replaced with a hydraulic hammer. FIG. 10C illustrates the left side of the drawing after the replacement.
Thereafter, as shown on the right side of the drawing in FIG. 10C, the pile 4 is driven into the water to a predetermined depth by a hydraulic hammer.
[0055]
Thereafter, the hydraulic hammer is separated from the pile 4, and post-operations such as cutting of a pile head, installation of a jacket, and construction of a superstructure are performed.
[0056]
Next, a case in which the pile 4 is gripped in an inclined manner will be described with reference to FIG.
First, in S21, the barge 1 is towed to the casting site, the spat 1a is lowered from the barge 1 to the seabed, and the barge 1 is fixed near the casting location. Subsequently, in S22, the driving guide 2 on the barge 1 is translated and rotated by the hydraulic jacks 7a and 7b to finely adjust the pile driving position.
[0057]
Then, a predetermined number of the stakes 4 are tilted and gripped by the gripping mechanism 3 (S23). That is, in S23, the tilting device 6 is set in the tilted state, the gripping mechanism 3 is set in the second opened state, and the pile 4 suspended obliquely by the crawler crane 5 or the like is moved between the arms 12a and 12b. After that, the pile 4 is gripped by the gripping mechanism 3 in an inclined state by bringing the gripping mechanism 3 into a gripping state.
[0058]
As described above, by holding the pile 4 in an inclined state, the height of the pile head and the head of the crawler crane 5 during the gripping operation of the pile 4 can be reduced. Piles can also be erected on the spot at the site.
When a predetermined number of piles 4 are gripped by the gripping mechanism 3 in an inclined state, the tilting device 6 is set in a horizontal state, and the piles 4 are erected vertically (S24).
[0059]
FIG. 11A shows a work process diagram of S23 and S24. The pile 4 on the left side of the drawing is suspended by being inclined by the crawler crane 5 and is held by the holding mechanism 3 as it is. The pile 4 on the left side of the drawing stands upright by setting the gripping mechanism 3 to a horizontal state by the tilting device 6.
When the steps of S23 and S24 are completed, the operation shifts to S5 in FIG. FIG. 11B shows the operation steps S5 to S7. FIG. 11C shows the operation steps of S8 to S12. The operations after S5 are the same as those described above, and a description thereof will be omitted.
[0060]
As described above, according to the method of driving the pile 4 of the present invention, the gripping mechanism 3 of the driving guide 2 can grip the pile 4, so that the barge 1 is towed to the pile driving site with the pile 4 gripped. be able to. Therefore, even when there is a height restriction and the pile 4 cannot be erected at the pile driving site, the pile 4 is erected at a temporary yard or the like having no height restriction, and the pile Since it can be towed to the ground, it is possible to carry out the work smoothly at the pile driving site where the height is limited.
[0061]
Also, by holding the pile 4 in an inclined state, the height of the pile head and the head of the crawler crane 5 during the gripping operation of the pile 4 can be reduced. Also, piles can be erected on the spot.
[0062]
Further, fine adjustment of the pile driving position is performed by moving and rotating the driving guide 2 capable of gripping the plurality of piles 4 on the barge 1, so that the relative positional relationship of the plurality of piles 4 does not change. If the positioning of one pile 4 is performed, the positions of the other piles 4 are determined, and the time required for positioning the pile driving position of the pile 4 can be reduced.
[0063]
Furthermore, since the gripping mechanism 3 can be opened and closed freely, if the gripping mechanism 3 is set to the second open state, the hydraulic hammer does not get caught when passing through the gripping mechanism 3.
[0064]
【The invention's effect】
The present invention has the following remarkable effects.
The driving guide according to the present invention can hold a pile at a place where the height is not limited, and then tow the barge to a pile driving site where the height is restricted. Can be reduced, and the pile driving operation can be performed smoothly. Further, since the driving guide of the present invention can hold a plurality of piles, the relative positional relationship between the plurality of piles is maintained even if the driving guide is moved. Therefore, if the positioning of one pile is performed at the time of fine adjustment of the pile driving position, the position of the other pile is automatically determined, so that the time required for the positioning operation can be reduced (claim 1).
[0065]
Since the placing guide of the present invention has a gripping mechanism that can be opened and closed, the pile can be gripped by the gripping pad by setting the gripping state. Further, by setting the primary open state, the pile can be guided by the guide roller. Further, by setting the secondary open state, the pile can be set from the side surface of the gripping mechanism. Further, in this state (secondary open state), the arm interval of the gripping mechanism is widened, and there is no interference by the hydraulic hammer or the like (claim 2).
[0066]
Since the placing guide of the present invention can hold the gripping mechanism in an inclined state, when the pile is gripped by the gripping mechanism, the height of the pile head or the crane head is set higher than the state in which the pile is erected vertically. Can also be lower. Thereby, in a work site with a height limitation, after holding the pile with the gripping mechanism in an inclined state, the tilting device is tilted, and the pile is vertically erected by setting the gripping mechanism in a horizontal state. (Claim 3).
[0067]
The driving guide according to the present invention is provided with a guide roller on the inner peripheral surface of the arm when the arm is closed (closed state) and in contact with the side surface of the pile. Since the guide roller comes into contact with the side surface of the pile and guides the pile, the pile can be driven in the correct direction (claim 4).
[0068]
The pile driving method of the present invention can reduce the number of joint piles because the pile can be erected at a site with a limited height by tilting and holding the pile by the gripping mechanism. It becomes. In addition, since positioning is performed for a plurality of piles at once, the time required for adjusting the pile driving position can be reduced. Further, when the pile is driven in the water, if the gripping mechanism is set to the second open state, the pile can be driven without interference (contact) between the hammer and the arm (claim 5).
[Brief description of the drawings]
FIG. 1 is a side view of a barge provided with a casting guide according to the present invention.
FIG. 2 is a front view of a barge provided with the casting guide of the present invention.
FIGS. 3A and 3B are a front view showing a state in which the casting guide is translated on the barge and a front view showing a state in which the casting guide is rotated on the barge.
4A is a front view of a gripping mechanism and a tilting device in a gripping state, and FIG. 4B is a side view of FIG.
FIG. 5 is a side view showing the operation of the tilting device.
FIGS. 6A and 6B are front views of the gripping mechanism and the tilting device in a primary release state, and FIG. 6B is a cross-sectional view of FIG.
FIGS. 7A and 7B are front views of the gripping mechanism and the tilting device in a secondary release state, and FIG. 7B is a cross-sectional view of FIG.
FIG. 8 is a flowchart showing a flow of a method for driving a pile according to the present invention.
FIG. 9 is a flowchart showing a flow of a method of driving a pile according to the present invention.
FIG. 10 is a process chart of a method for driving a pile.
FIG. 11 is a process chart of a method for driving a pile.
[Explanation of symbols]
1 barge
1a Spat
2 Casting guide
2a Inner frame
2b Outer frame
3 gripping mechanism
4 piles
5 Crawler crane
6 Tilt device
6a Support
6b Tilt arm
6c tilt cylinder
6d tilt axis
7a, 7b hydraulic jack
10 Support
11a, 11b Rotating shaft
12a First arm
12b Second arm
13 Grip pad
13a Pad part
13b Cylinder part
14a, 14b hydraulic jack
15 Guide roller

Claims (5)

A pile driving guide mounted on a barge for driving a plurality of piles on the water floor, wherein the driving guide is a frame body that can be freely translated and rotated on the barge,
A plurality of gripping mechanisms extend from the periphery of the driving guide toward the water surface, the gripping mechanism grips the plurality of piles, and guides the piles at the time of the driving. Installation guide. The gripping mechanism includes a gripping pad capable of gripping a side surface of the pile, and a pair of inferior arc-shaped arms from which the gripping pad projects,
The pair of arms are supported by the driving guide so as to be openable and closable via a rotating shaft,
2. The pile driving guide according to claim 1, wherein the grip pad grips a side surface of the pile by making an amount of protrusion from an inner peripheral surface of an arm variable. 3. The gripping mechanism is supported by the driving guide via a tilting device,
The tilting device is supported by the driving guide via a tilting axis, and by tilting the tilting device about the tilting axis, the gripping mechanism can be held in an inclined state. The driving guide according to claim 2, characterized in that: The pile according to claim 2 or 3, wherein a guide roller for contacting a side surface of the pile in the closed state and guiding the pile is provided on the inner peripheral surface. Casting guide. A pile driving method using the pile driving guide according to claim 3,
Tilting the tilting device, and tilting the gripping mechanism;
Bringing the pair of arms into the open state and introducing the pile between the pair of arms;
Holding the pair of arms in the closed state and gripping the pile by maximizing the protrusion amount of the gripping pad;
Tilting the tilting device, vertically erecting the pile gripped by the gripping pad,
Positioning the pile by translating and rotating the driving guide on the barge,
Minimizing the amount of protrusion of the gripping pad, opening the pile, and placing the pile in the air,
Leaving the pair of arms in the open state, submerging the hammer in water and driving a pile,
Pile driving method with

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