JP7229738B2 - Method of press-fitting piles at corners - Google Patents

Description

The present invention relates to a method for press-fitting a pile at a corner.

As a method of driving and burying various steel pipe piles and shaped steel piles into the ground, the upper end of the existing pile embedded in the ground is gripped with a clamp to absorb the reaction force, and the chuck holding the pile is moved up and down. , a construction technique is known in which new piles are sequentially pressed into positions adjacent to existing piles.

The pile press-in machine used for such construction has a saddle that is fixed to the existing pile via a plurality of clamps, and a slide frame that can move forward and backward relative to the saddle. A liftable chuck is attached to the mast. Piles such as steel sheet piles, steel pipe sheet piles, steel pipe piles, and concrete piles are known as piles used for press-fitting. Then, the chuck is positioned at a predetermined position with respect to the saddle, and the pile is hung by a crane or the like and brought to a predetermined position. It is designed to be press-fitted.

Here, for example, in order to form a closed space surrounded by piles, piles may be press-fitted at corners where the direction in which the piles are arranged is curved, such as when piles are press-fitted in a square arrangement. For example, in Patent Documents 1 to 3, the first and second piles are arranged in the direction of travel from the corner while holding the existing pile in the row before the bend in the direction in which the piles are arranged at the corner to take the reaction force. It is shown pressed in.

JP-A-6-200525 JP-A-3-47317 Japanese Utility Model Laid-Open No. 5-81332

The present invention provides a suitable method for press-fitting piles at a corner portion where the direction in which the piles are arranged is curved.

According to the present invention, there is provided a press-fitting method in which an existing pile is gripped by a pile press-in machine and the piles are sequentially pressed into the ground by taking a reaction force, wherein the pile press-in machine is composed of a fixed claw and a movable claw. Equipped with a saddle to which multiple clamps are attached, clamping the existing piles in the row before the piles are bent to take reaction force, and the direction of movement from the corner part in the row after the piles are bent The first pile and the first and second piles are pressed in in the opposite direction to the direction of travel from the corner of the row after the piles are bent, and then the piles are bent. Press in a second pile from the corner in the back row in the direction of travel to a depth such that the second pile can support at least the pile press machine, and then take up the bearing capacity with the second pile. The pile press-in machine is moved by using the The first and second piles are sandwiched in the direction to take reaction force, and the third pile is pressed in from the corner part in the row after the piles are aligned in the direction of bending, and then the third pile is pressed. The pile press-in machine is moved by taking the bearing force from the piles, and the first and second piles in the direction of travel from the corner part of the row after the piles are bent, and after the piles are bent. A method of press-fitting a pile at a corner is characterized by rotating the direction of the saddle by 180° in a plan view when holding the first pile in the direction opposite to the direction of movement from the corner in the row and taking a reaction force. provided.

The corner in the row after the piles are bent by clamping the piles pressed in in the direction opposite to the direction of movement from the corner part in the row after the direction in which the piles are lined up is bent. The pile press-fitted from the part in the direction opposite to the traveling direction may be pulled out. In this case, the first and second piles in the direction of travel from the corner part of the row after the direction of pile alignment is bent, and the corner part of the row after the direction of pile alignment is bent in the direction opposite to the direction of travel The first pile may be clamped to take a reaction force, and the second pile may be pulled out in the direction opposite to the traveling direction from the corner portion in the row after the direction in which the piles are arranged is bent. In addition, the first, second, and third piles are sandwiched in the direction of travel from the corner part of the row after the direction in which the piles are lined up bends, and the reaction force is taken, and the corners in the row after the direction in which the piles are lined up bends. You may make it pull out the 1st pile in the direction opposite to a advancing direction from a part.

According to the present invention, the piles are arranged and press-fit in the direction opposite to the direction of travel from the corner portion in the row after the direction of the piles is bent, sandwiching the corner portion where the direction of the piles is bent. By clamping a pile pressed in in the direction opposite to the direction of travel from the corner in the row after the direction of pile alignment is bent, the pile is pushed in the direction of travel from the corner. It becomes possible to press-fit smoothly. In addition, at the corner where the direction of the piles is curved, the piles in the row before the direction of the piles is bent and the piles in the row after the direction of the piles are arranged to intersect. When fixing a saddle to an existing pile with a plurality of clamps composed of movable pawls, there is a risk that the clamps will cushion the existing pile. According to the present invention, such clamps can be avoided from interfering with existing piles by rotating the orientation of the saddles 180° in plan view as needed.

1 is a side view of a pile press-in machine according to an embodiment of the present invention; FIG. 1 is a rear view of a pile press-in machine according to an embodiment of the present invention; FIG. 1 is a plan view of a pile press-in machine according to an embodiment of the present invention; FIG. 4 to 19 are explanatory diagrams (FIGS. 4 to 19) of the procedure for construction so that the direction in which the piles are arranged in the corner is bent 90° to the right by the pile press-in machine according to the embodiment of the present invention, and two It shows the state of press-fitting the main pile. It shows the state where the first pile is pressed in from the corner to the front. The pile press-in machine (saddle) is moved forward from the corner to the positions of the second, third, and fourth piles. It shows the state of press-fitting the first pile in the direction bent to the right. It shows the state of press-fitting the first pile in the direction opposite to the direction of the right bend. It shows the state of press-fitting the second pile in the direction opposite to the right-curved direction. It shows the state of press-fitting the second pile in the direction bent to the right. Move the pile press-in machine (saddle) to the position of the first pile in the direction of the right bend, the first pile in the opposite direction of the right bend, and the second pile in the opposite direction of the right bend. state. It shows the state of press-fitting the third pile in the direction bent to the right. When the pile press-in machine (saddle) is moved to the position of the second pile in the direction of bending to the right, the first pile in the direction of bending to the right, and the first pile in the direction opposite to the direction of bending to the right, the movable claw is Shown is the state where the first pile collides with the front from the corner. By rotating the direction of the saddle by 180° in a plan view, the movable claw does not collide with the first stake from the corner portion. It shows the pulling out of the second pile in the opposite direction of the right turn. It shows the state of press-fitting the fourth pile in the direction bent to the right. The pile press-in machine (saddle) is moved to the position of the third pile that bends to the right, the second pile that bends to the right, and the first pile that bends to the right. Here, the saddle is rotated 180°. It shows a state in which the first pile is pulled out in the opposite direction of the right turn. It shows the state of press-fitting the fifth pile in the direction bent to the right. FIG. 20 to FIG. 35 are explanatory diagrams (FIGS. 20 to 35) of the procedure for construction so that the direction in which the piles are arranged in the corner is bent 90° to the left by the pile press-in machine according to the embodiment of the present invention, and two It shows the state of press-fitting the main pile. It shows the state where the first pile is pressed in from the corner to the front. The pile press-in machine (saddle) is moved forward from the corner to the positions of the second, third, and fourth piles. It shows the state of press-fitting the first pile in the direction bent to the left. It shows a state in which the first pile is press-fitted in the opposite direction of the left bend. It shows the state of press-fitting the second pile in the direction opposite to the direction of the left bend. It shows the state of press-fitting the second pile in the direction bent to the left. Move the pile press-in machine (saddle) to the position of the first pile in the direction of the left bend, the first pile in the opposite direction of the left bend, and the second pile in the opposite direction of the left bend. state. It shows the state of press-fitting the third pile in the direction bent to the left. When moving the pile press-in machine (saddle) to the position of the second pile in the direction of bending to the left, the first pile in the direction of bending to the left, and the position of the first pile in the direction opposite to the direction of bending to the left, the movable claw is Shown is the state where the first pile collides with the front from the corner. By rotating the direction of the saddle by 180° in a plan view, the movable claw does not collide with the first stake from the corner portion. It shows the pulling out of the second pile in the opposite direction of the left turn. It shows the state of press-fitting the fourth pile in the direction bent to the left. The pile press-in machine (saddle) is moved to the position of the third pile bent to the left, the second pile bent to the left, and the first pile bent to the left. It shows a state in which the first pile is pulled out in the opposite direction of the left turn. It shows the state of press-fitting the fifth pile in the direction bent to the left.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

Further, in this specification, the front, rear, and left and right directions are defined based on the orientation of the pile press-in machine 1 . For example, in FIG. 1, the right side is the front, the left side is the rear, the right side is the direction away from the paper surface, and the left side is the direction away from the paper surface. In FIG. 2, the lower side of the paper surface is the front side, the upper side of the paper surface is the rear side, the right side is the right side, and the left side is the left side. In FIG. 3, the upper side is the front, the lower side is the rear, the right side is the right side, and the left side is the left side.

As shown in FIGS. 1 to 3, three clamps 11 are arranged in the front-rear direction at the lower portion of a saddle 10, which is the main body of the pile press-in machine 1 according to the embodiment of the present invention. Each clamp 11 is composed of a fixed claw 12 and a movable claw 13 , and the movable claw 13 approaches and separates from the fixed claw 12 by operating a cylinder built in the movable claw 13 . By operating the cylinder, the upper end of the existing pile P can be sandwiched between the fixed claw 12 and the movable claw 13 to switch between a state in which the saddle 10 is fixed to the existing pile P and a state in which the existing pile P is released. can. In FIG. 1, the saddle 10 is fixed by clamping the upper ends of the three existing piles P with each clamp 11, and a new pile P is press-fitted in front of the three piles P. It shows a state where Moreover, in the embodiment, as an example of the pile P, a U-shaped steel sheet pile is shown.

As shown in FIG. 2, the clamp 11 (fixed claw 12 and movable claw 13) can slide left and right under the saddle 10. As shown in FIG. In FIG. 2, the clamp 11 (fixed claw 12 and movable claw 13) indicated by a solid line is moved to the right under the saddle 10, and the clamp 11 (fixed claw 12 and movable claw 13) indicated by a dashed line. ) shows a state in which the lower portion of the saddle 10 is moved to the left.

In the state shown in FIG. 3, of the three clamps 11, the front clamp 11 has the fixed claw 12 on the right and the movable claw 13 on the left, and the central clamp 11 has the fixed claw 12 on the left and the movable claw 13 on the left. is on the right, and the rear clamp 11 is in a state where the fixed claw 12 is on the right and the movable claw 13 is on the left. However, as will be described later, by rotating the saddle 10 by 180° in plan view, the positional relationship between the fixed claw 12 and the movable claw 13 in each clamp 11 can be reversed.

As for the fixed claw 12 and the movable claw 13 that constitute each clamp 11, the size of the movable claw 13 is larger than the size of the fixed claw 12 because the movable claw 13 has a built-in cylinder. Therefore, when clamping the upper end of the existing pile P with each clamp 11, the side on which the movable claws 13 are arranged requires a wider space than the side on which the fixed claws 12 are arranged.

A slide frame 15 is provided on the upper portion of the saddle 10 so as to be slidable in the longitudinal direction with respect to the saddle 10 . On the slide frame 15, a mast 20 serving as a swivel base is configured so as to be able to swivel 360° with respect to the slide frame 15 in plan view around a base shaft 16 provided at the center of the slide frame 15. . The rotation of the mast 20 is performed by a rotary drive source (not shown) such as a motor provided on the underside of the mast 20, for example.

A chuck 25 that can be raised and lowered along an elevation guide 21 is attached to the front of the mast 20 . The chuck 25 has a configuration in which a casing chuck 27 is attached to a chuck frame 26 which is attached to a lifting guide 21 in front of the mast 20 so as to be able to move up and down. The entire chuck 25 (chuck frame 26 and casing chuck 27 ) moves up and down integrally with the expansion and contraction of the cylinder 30 . The rod side of the cylinder 30 is attached to the mast 20, and the tube side is attached to the chuck 25 (chuck frame 26). Therefore, the extension operation of the cylinder 30 raises the chuck 25 with respect to the mast 20 , and the shortening operation of the cylinder 30 lowers the chuck 25 with respect to the mast 20 .

The casing chuck 27 is rotatably mounted on the chuck frame 26 . The casing chuck 27 has a cylindrical shape as a whole, and a U-shaped opening 31 extending vertically through the casing chuck 27 is provided inside the casing chuck 27 . A pile P, which is a U-shaped steel sheet pile, is passed through the opening 31 .

A fixed claw 32 and a movable claw 33 are provided facing each other in the horizontal direction at the inner lower portion of the casing chuck 27 . The movable claw 33 is moved toward and away from the fixed claw 32 by a hydraulic cylinder (not shown). A pile P to be press-fitted is gripped by a fixed claw 32 and a movable claw 33 provided on the casing chuck 27 .

Next, using the pile press-in machine 1 according to the embodiment of the present invention configured as described above, the process of press-fitting the pile P at the corner portion C where the direction in which the piles P are arranged is curved will be performed in order. explain. 4 to 19, the case where the direction in which the piles P are arranged at the corner portion C is bent to the right by 90° will be described. 20 to 35, the case where the direction in which the piles P are arranged at the corner portion C is bent to the left by 90° will be described.

4 to 6 show the state in which the piles P in the row before the piles are bent are pressed in, and FIG. 4 shows the state in which the second pile P2 is pressed in from the corner C. , and FIGS. 5 and 6 show a state in which the first pile P1 is press-fitted from the corner portion C to the front.

As shown in FIG. 4, when the second pile P2 is press-fitted forward from the corner C, three clamps 11 provided at the bottom of the saddle 10 are used to press the third pile P3 forward from the corner C. A fourth pile P4 and a fifth pile P5 are clamped, and the saddle 10 of the pile press-in machine 1 is fixed to the existing piles P, namely the third pile P3, the fourth pile P4 and the fifth pile P5. to obtain a reaction force. In addition, the three clamps 11 are appropriately moved in the left-right direction under the saddle 10 . Also, the pile P (second pile P2) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile P2 is placed on the ground while the joint at the front end of the third pile P3 and the joint at the rear end of the second pile P2 are engaged. press in.

After the second pile P2 is pressed into the ground by the stroke of the cylinder 30, the grip of the second pile P2 is temporarily released, and the chuck 25 is lifted by extending the cylinder 30. Then, at the position where the chuck 25 is lifted, the second pile P2 is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile P2 is further press-fitted into the ground. By repeating this operation, the second pile P2 is press-fitted into the ground to a predetermined depth, and the press-fitting of the second pile P2 ends before the corner portion C.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the third pile P3, the fourth pile P4, and the fifth pile P5, the slide frame 15 slides forward and the mast 20 moves forward. , and the chuck 25 moves to a position where the first pile P1 is press-fitted forward from the corner portion C, as shown in FIG. Then, the pile P (the first pile P1) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile P1 is placed on the ground while the joint at the front end of the second pile P2 and the joint at the rear end of the first pile P1 are engaged. press in.

After the first pile P1 is pressed into the ground by the stroke of the cylinder 30, the grip of the first pile P1 is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Then, the first pile P1 is gripped again at the position where the chuck 25 is lifted. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile P1 is further press-fitted into the ground. By repeating this operation, the first pile P1 is first pressed in to a depth where at least the pile press-in machine 1 can be supported.

Next, with the chuck 25 gripping the first pile P1, the clamps 11 under the saddle 10 are released. (The first pile P1 is gripped by the chuck 25 at a self-propelled position.) as a fulcrum, the pile press-in machine 1 (saddle 10) is lifted above the third pile P3, the fourth pile P4, and the fifth pile P5. Next, as shown in FIG. 6, while the chuck 25 is holding the first pile P1, the slide frame 15 is slid to move the pile press-in machine 1 (saddle 10) to the second pile P2 and the third pile. It is moved above the first pile P3 and the fourth pile P4. Then, by the extension operation of the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and the three clamps 11 provided at the bottom of the saddle 10 move the second pile P2, the third pile P3, and the fourth pile. (At this time, the three clamps 11 slide left and right under the saddle 10 as appropriate.), and the saddle 10 of the pile press-in machine 1 is attached to the existing pile P, which is the second pile. It is fixed to P2, the third pile P3, and the fourth pile P4 to take the reaction force. After that, the first pile P1 is further press-fitted into the ground, the first pile P1 is pressed into the ground to a predetermined depth, and the press-fitting of the first pile P1 is completed before the corner part C.

The procedure up to this point is the press-fitting procedure for the row before the pile P is bent, and the following is the press-fitting procedure for the row after the pile P is bent. Further, the position of the corner portion C is the front end of the first pile P1 before the corner portion C. As shown in FIG.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the first pile Pc1 is pressed in from the corner portion C in the traveling direction. I do. That is, by sliding movement of the slide frame 15 and turning of the mast 20, the chuck 25 moves to a position where the first pile Pc1 is press-fitted in a direction bent 90° to the right from the corner portion C, as shown in FIG. . Then, the pile P (first pile Pc1 after bending) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc1 after bending is pressed into the ground.

Here, due to the rotation of the casing chuck 27, the bent first pile Pc1 is bent 90° to the right with respect to the first pile P1 from the corner portion C to the near side. Then, as shown in an enlarged view in FIG. 7(a), the joint at the front end of the first pile P1 is engaged with the joint at the left end of the first pile Pc1 after bending. In this state, the first pile Pc1 after bending is pressed into the ground.

When the first pile Pc1 bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the first pile Pc1 after bending is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the first pile Pc1 after bending is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc1 after being bent is further press-fitted into the ground. By repeating this operation, the first pile Pc1 after bending is press-fitted into the ground to a predetermined depth, and the press-fitting of the first pile Pc1 after bending from the corner portion C is completed.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. The first pile Pc-1 is lined up and press-fitted from C in the direction opposite to the direction of travel. That is, by sliding movement of the slide frame 15 and turning of the mast 20, as shown in FIG. Move to the position to press fit. Then, the pile P (the first pile Pc-1 in the direction opposite to the bending direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is pressed into the ground.

Here, due to the rotation of the casing chuck 27, the first pile Pc-1 in the direction opposite to the bent direction is bent 90° to the left with respect to the first pile P1 from the corner portion C. . In addition, as shown enlarged in FIG. 8(a), the joint at the right end of the first pile Pc-1 in the direction opposite to the bent direction is positioned at the corner C, but is positioned in front of the corner C. The first pile Pc-1 in the direction opposite to the bending direction is press-fitted into the ground without engaging the front end joint of the first pile P1 and the left end joint of the first pile Pc1 after bending. To go.

In addition, once the first pile Pc-1 in the direction opposite to the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the grip of the first pile Pc-1 in the direction opposite to the direction bent is released. The extension operation of the cylinder 30 raises the chuck 25 . Then, at the position where the chuck 25 is raised, the first pile Pc-1 in the direction opposite to the bending direction is gripped again. Then, the chuck 25 is lowered by the shortened operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bending direction is further press-fitted into the ground. By repeating this operation, the first pile Pc-1 in the direction opposite to the bending direction is press-fitted into the ground to a predetermined depth, and the press-fitting of the first pile Pc-1 in the direction opposite to the bending direction is completed. .

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. A second pile Pc-2 in the direction opposite to the traveling direction from C is aligned with the first pile Pc-1 in the direction opposite to the bent direction and press-fitted. That is, by sliding movement of the slide frame 15 and turning of the mast 20, as shown in FIG. Move to the position to press fit. Then, the pile P (the second pile Pc-2 in the direction opposite to the bending direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. When the pile P is gripped in a predetermined posture, the casing chuck 27 is appropriately rotated in accordance with the appropriate posture of the pile P (the same applies hereinafter). Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is pressed into the ground.

In addition, the right end joint of the second pile Pc-2 in the opposite direction to the bent direction is engaged with the left end joint of the first pile Pc-1 in the opposite direction to the bent direction. The second pile Pc-2 in the opposite direction is pressed into the ground.

In addition, once the second pile Pc-2 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the second pile Pc-2 in the direction opposite to the direction bent is released, The extension operation of the cylinder 30 raises the chuck 25 . Then, at the position where the chuck 25 is raised, the second pile Pc-2 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is further press-fitted into the ground. By repeating this operation, the second pile Pc-2 in the direction opposite to the bent direction is press-fitted into the ground to a predetermined depth, and the press-fitting of the second pile Pc-2 in the direction opposite to the bent direction is completed. .

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. A second pile Pc2 is press-fitted from C in the direction of travel. That is, by sliding movement of the slide frame 15 and turning of the mast 20, the chuck 25 moves to a position where the second pile Pc2 is press-fitted in a direction bent 90° to the right from the corner portion C, as shown in FIG. . Then, the pile P (the second pile Pc2 in the bent direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc2 in the bent direction is pressed into the ground.

In addition, when the second pile Pc2 bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the second pile Pc2 bent is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the second stake Pc2 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc2 in the bent direction is further press-fitted into the ground. By repeating such an operation, the second pile Pc2 in the bent direction is pressed in to a depth at which at least the pile press-in machine 1 can be supported.

Next, with the chuck 25 gripping the second pile Pc2 in the bent direction, the clamps 11 below the saddle 10 are released. Next, while the second pile Pc2 in the bent direction is held by the chuck 25, the cylinder 30 is shortened to move the pile press-in machine 1 (saddle 10) to the second pile with the chuck 25 as a fulcrum. Lift above the pile P2, the third pile P3, and the fourth pile P4. Next, as shown in FIG. 11, while the chuck 25 is holding the second pile Pc2 in the bent direction, the pile press-in machine 1 (saddle 10 ) above the first pile Pc1 in the curved direction, the first pile Pc-1 in the opposite direction to the curved direction, and the second pile Pc-2 in the opposite direction to the curved direction. By extending the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and three clamps 11 provided at the bottom of the saddle 10 clamp the first pile Pc1 in the bent direction, A first pile Pc-1 in the opposite direction and a second pile Pc-2 in the opposite direction to the bent direction are clamped, respectively, and a saddle 10 of the pile press-in machine 1 is set to the existing pile P in one of the bent directions. It is fixed to the first pile Pc1, the first pile Pc-1 in the direction opposite to the bent direction, and the second pile Pc-2 in the opposite direction to the bent direction to take reaction force. After that, the second pile Pc2 in the bent direction is pressed into the ground, the second pile Pc2 in the bent direction is pressed into the ground to a predetermined depth, and the second pile Pc2 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is set to the first pile Pc1 in the bent direction, the first pile Pc-1 in the opposite direction to the bent direction, and the second pile Pc- in the opposite direction to the bent direction. 2, the third pile Pc3 is press-fitted in the direction of travel from the corner portion C in the row after the direction in which the piles P are arranged is bent. That is, by sliding movement of the slide frame 15, as shown in FIG. 12, the chuck 25 moves to a position where the third pile Pc3 is press-fitted in a direction bent 90 degrees to the right from the corner portion C. As shown in FIG. Then, the pile P (the third pile Pc3 in the bent direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the third pile Pc3 in the bent direction is pressed into the ground.

Further, when the third pile Pc3 in the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the grip of the third pile Pc3 in the bent direction is once released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the third stake Pc3 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the third pile Pc3 in the bent direction is further press-fitted into the ground. By repeating such an operation, first, the third pile Pc3 in the bent direction is press-fitted to a depth at which at least the pile press-fitting machine 1 can be supported.

Next, with the chuck 25 gripping the third pile Pc3 in the bent direction, the clamps 11 below the saddle 10 are released. Next, the pile press-in machine 1 (saddle 10) is bent with the chuck 25 as a fulcrum by shortening the operation of the cylinder 30 while holding the third pile Pc3 in the bent direction with the chuck 25. Lift above the first pile Pc1 in the direction, the first pile Pc-1 in the opposite direction to the bent direction, and the second pile Pc-2 in the opposite direction to the bent direction. Next, as shown in FIG. 13, the pile press-fitting machine 1 (saddle 10) is bent by sliding the slide frame 15 while holding the third pile Pc3 in the bent direction with the chuck 25. It is moved above the second pile Pc2 in the direction, the first pile Pc1 in the bent direction, and the first pile Pc-1 in the opposite direction to the bent direction.

Then, by extending the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and the three clamps 11 provided at the bottom of the saddle 10 lift the second pile Pc2 in the bent direction. The first pile Pc1 and the first pile Pc-1 in the direction opposite to the bent direction are clamped, respectively. This buffers the pile press-in machine 1 (saddle 10) and may interfere with the descent. That is, as described above, in the fixed claw 12 and the movable claw 13 that constitute the clamp 11, the size of the movable claw 13 is larger than the size of the fixed claw 12 because the movable claw 13 has a built-in cylinder. ing. Therefore, when clamping the upper end of the existing pile P with the clamp 11, the side on which the movable claw 13 is arranged requires a wider space than the side on which the fixed claw 12 is arranged.

However, in the corner portion C, since the piles P in the row before the bending of the piles P and the piles P in the row after the bending of the piles P intersect each other, the movable claw 13 is arranged. There may not be enough space for For example, as shown in FIG. 13, at the corner portion C, the space S sandwiched between the first pile P1 in front of the corner portion C and the first pile Pc1 in the bent direction is narrowed. For this reason, the movable claw 13 does not enter the space S, which may hinder the downward movement of the pile press-in machine 1 (saddle 10). In such a case, if the upper end portion of the first pile P1 is cut before the corner portion C, the pile P will be lost. In addition, it is also necessary to repair the cut portion by welding or the like.

Therefore, before lowering the pile press-in machine 1 (saddle 10), the orientation of the saddle 10 is rotated by 180° in plan view as shown in FIG. (In order to prevent buffering between the saddle 10 and the chuck 25, as shown in FIG. 12, the first pile Pc1 in the bent direction and the first pile Pc- 1. Rotate the saddle 10 before self-propelled in a state above the second pile Pc-2 in the direction opposite to the bent direction.) As a result, the first pile P1 and A fixed claw 12, which is smaller than the movable claw 13, enters the space S sandwiched between the first pile Pc1 in the bent direction. As a result, the pile press-in machine 1 (saddle 10) can be lowered smoothly.

After rotating the saddle 10 by 180 degrees in plan view, the cylinder 30 is extended to lower the pile press-in machine 1 (saddle 10). Then, by three clamps 11 provided at the bottom of the saddle 10, the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile Pc- in the opposite direction to the bent direction. 1 are held, and the saddle 10 of the pile press-in machine 1 is attached to the existing pile P, which is the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile in the opposite direction to the bent direction. is fixed to the stake Pc-1 to take reaction force. After that, the third pile Pc3 in the bent direction is pressed into the ground, and the third pile Pc3 in the bent direction is pressed into the ground to a predetermined depth, and the third pile Pc3 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is fixed to the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile Pc-1 in the opposite direction to the bent direction. In the state of , the second pile Pc-2 is pulled out in the direction opposite to the bent direction. That is, after the chuck 25 first rises above the third pile Pc3, the turning of the mast 20 causes the chuck 25 to lift the second pile Pc-2 in the direction opposite to the bent direction, as shown in FIG. Move up. Then, the chuck 25 is lowered by the shortened operation of the cylinder 30, and the casing chuck 27 of the chuck 25 grips the second pile Pc-2 pressed into the ground in the direction opposite to the bent direction. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is pulled out from the ground.

In addition, when the second pile Pc-2 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pulled out from the ground, the grip of the second pile Pc-2 in the direction opposite to the direction bent is released. The shortened operation of cylinder 30 lowers chuck 25 . Then, at the position where the chuck 25 is lowered, the second pile Pc-2 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is further pulled out from the ground. By repeating this operation, the second pile Pc-2 in the direction opposite to the bent direction is completely pulled out from the ground, and the pulling out of the second pile Pc-2 in the direction opposite to the bent direction is completed.

Next, the saddle 10 of the pile press-in machine 1, the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, the first pile in the opposite direction of the bend The fourth pile Pc-1 is press-fitted in the direction of travel from the corner portion C in the row after the direction in which the piles P are arranged is bent. That is, by turning the mast 20 and sliding the slide frame 15, as shown in FIG. 16, the chuck 25 moves to a position where the fourth pile Pc4 is press-fitted in a direction bent 90° to the right from the corner portion C. . Then, the pile P (fourth pile Pc4 in the bent direction) to be press-fitted next into the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the fourth pile Pc4 in the bent direction is pressed into the ground.

Further, when the fourth pile Pc4 in the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the fourth pile Pc4 in the bent direction is once released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the fourth stake Pc4 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the fourth pile Pc4 in the bent direction is further press-fitted into the ground. By repeating such an operation, first, the fourth pile Pc4 in the bent direction is press-fitted to a depth at which at least the pile press-fitting machine 1 can be supported.

Next, with the chuck 25 gripping the fourth pile Pc4 in the bent direction, the clamps 11 below the saddle 10 are released. Next, the pile press-in machine 1 (saddle 10) is bent with the chuck 25 as a fulcrum by shortening the operation of the cylinder 30 while holding the fourth pile Pc4 in the bent direction with the chuck 25. Lift the second pile Pc2 in the direction, the first pile Pc1 in the curved direction, and the first pile Pc-1 in the opposite direction to the curved direction. Next, as shown in FIG. 17, the pile press-in machine 1 (saddle 10) is bent by sliding the slide frame 15 while holding the fourth pile Pc4 in the bent direction with the chuck 25. It is moved above the third pile Pc3 in the direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction.

Also in this case, as shown in FIG. 17, at the corner portion C, the space S sandwiched between the first pile P1 in front of the corner portion C and the first pile Pc1 in the bent direction becomes narrow. Therefore, the movable claw 13 does not enter the space S, which may hinder the lowering of the pile press-in machine 1 (saddle 10). Therefore, as before, before lowering the pile press-in machine 1 (saddle 10), as shown in FIG. The pile press-in machine 1 (saddle 10) is lowered. Also in this case, the saddle 10 is rotated before the press-fitting machine 1 is self-propelled. Three clamps 11 provided at the bottom of the saddle 10 clamp the third pile Pc3 in the bent direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction, respectively. , the saddle 10 of the pile press-in machine 1 is fixed to the third pile Pc3 which is the existing pile P, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction to take reaction force. After that, the fourth pile Pc4 in the bent direction is pressed into the ground, and the fourth pile Pc4 in the bent direction is pressed into the ground to a predetermined depth, and the fourth pile Pc4 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is fixed to the third pile Pc3 in the bent direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction. Pull out the first pile Pc-1 in the direction opposite to the direction of the first pile. That is, after the chuck 25 first rises above the fourth pile Pc4, as the mast 20 turns, as shown in FIG. Move up. Then, the chuck 25 is lowered by shortened operation of the cylinder 30, and the casing chuck 27 of the chuck 25 grips the first pile Pc-1 pressed into the ground in the direction opposite to the bent direction. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is pulled out from the ground.

In addition, once the first pile Pc-1 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pulled out from the ground, the grip of the first pile Pc-1 in the direction opposite to the direction bent is released. The shortened operation of cylinder 30 lowers chuck 25 . Then, at the position where the chuck 25 is lowered, the first pile Pc-1 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is further pulled out from the ground. By repeating this operation, the first pile Pc-1 in the direction opposite to the bent direction is completely pulled out from the ground, and the pulling out of the first pile Pc-1 in the direction opposite to the bent direction is completed.

Next, as shown in FIG. 19, the chuck 25 moves to a position where the fifth pile Pc5 is press-fitted in a direction bent 90° to the right from the corner portion C. Then, as shown in FIG. After that, the fifth and subsequent piles Pc5 in the curved direction are press-fitted in sequence. In this way, a row of piles is constructed in which the direction in which the piles P are arranged at the corner portion C is bent 90° to the right.

Next, with reference to FIGS. 20 to 35, the case where the direction in which the piles P are arranged at the corner portion C is bent to the left by 90° will be described.

20 to 22 show a state in which the pile P in the row before the piles are bent is pressed in, and FIG. 20 shows a state in which the second pile P2 is pressed in from the corner portion C. , and FIGS. 21 and 22 show a state in which the first pile P1 is press-fitted forward from the corner portion C. As shown in FIG.

As shown in FIG. 20, when the second pile P2 is press-fitted forward from the corner C, three clamps 11 provided at the bottom of the saddle 10 are used to press the third pile P3 forward from the corner C. A fourth pile P4 and a fifth pile P5 are clamped, and the saddle 10 of the pile press-in machine 1 is fixed to the existing piles P, namely the third pile P3, the fourth pile P4 and the fifth pile P5. to obtain a reaction force. Also, the pile P (second pile P2) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile P2 is placed on the ground while the joint at the front end of the third pile P3 and the joint at the rear end of the second pile P2 are engaged. press in.

After the second pile P2 is pressed into the ground by the stroke of the cylinder 30, the grip of the second pile P2 is temporarily released, and the chuck 25 is lifted by extending the cylinder 30. Then, at the position where the chuck 25 is lifted, the second pile P2 is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile P2 is further press-fitted into the ground. By repeating this operation, the second pile P2 is press-fitted into the ground to a predetermined depth, and the press-fitting of the second pile P2 ends before the corner portion C.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the third pile P3, the fourth pile P4, and the fifth pile P5, the slide frame 15 slides forward and the mast 20 moves forward. 21, the chuck 25 moves to a position where the first pile P1 is press-fitted forward from the corner portion C. As shown in FIG. Then, the pile P (the first pile P1) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile P1 is placed on the ground while the joint at the front end of the second pile P2 and the joint at the rear end of the first pile P1 are engaged. press in.

After the first pile P1 is pressed into the ground by the stroke of the cylinder 30, the grip of the first pile P1 is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Then, the first pile P1 is gripped again at the position where the chuck 25 is lifted. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile P1 is further press-fitted into the ground. By repeating this operation, the first pile P1 is first pressed in to a depth where at least the pile press-in machine 1 can be supported.

Next, with the chuck 25 gripping the first pile P1, the clamps 11 under the saddle 10 are released. Next, while the first pile P1 is held by the chuck 25, the cylinder 30 is shortened to operate the pile press-in machine 1 (saddle 10) with the chuck 25 as a fulcrum for the third pile P3 and the fourth pile. Lift above the first pile P4 and the fifth pile P5. Next, as shown in FIG. 22, while the first pile P1 is held by the chuck 25, the slide frame 15 slides to move the pile press-in machine 1 (saddle 10) to the second pile P2 and the third pile. It is moved above the first pile P3 and the fourth pile P4. Then, by the extension operation of the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and the three clamps 11 provided at the bottom of the saddle 10 move the second pile P2, the third pile P3, and the fourth pile. (At that time, the three clamps 11 move appropriately to the left and right at the bottom of the saddle 10), and the saddle 10 of the pile press-in machine 1 is attached to the second pile P2, which is the existing pile P. It is fixed to the third pile P3 and the fourth pile P4 to take reaction force. After that, the first pile P1 is further press-fitted into the ground, the first pile P1 is pressed into the ground to a predetermined depth, and the press-fitting of the first pile P1 is completed before the corner part C.

The procedure up to this point is the press-fitting procedure for the row before the pile P is bent, and the following is the press-fitting procedure for the row after the pile P is bent. Further, the position of the corner portion C is the front end of the first pile P1 before the corner portion C. As shown in FIG.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the first pile Pc1 is pressed in from the corner portion C in the traveling direction. I do. That is, by sliding movement of the slide frame 15 and turning of the mast 20, as shown in FIG. 23, the chuck 25 moves to a position where the first pile Pc1 is press-fitted in a direction bent 90° to the left from the corner portion C. . Then, the pile P (first pile Pc1 after bending) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc1 after bending is pressed into the ground.

Here, due to the rotation of the casing chuck 27, the bent first pile Pc1 is bent 90° to the left with respect to the first pile P1 from the corner portion C to the near side. Then, as shown enlarged in FIG. 23(a), the joint at the front end of the first pile P1 and the joint at the right end of the first pile Pc1 after bending are engaged in front of the corner portion C. In this state, the first pile Pc1 after bending is pressed into the ground.

When the first pile Pc1 bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the first pile Pc1 after bending is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the first pile Pc1 after bending is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc1 after being bent is further press-fitted into the ground. By repeating this operation, the first pile Pc1 after bending is press-fitted into the ground to a predetermined depth, and the press-fitting of the first pile Pc1 after bending from the corner portion C is completed.

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. The first pile Pc-1 is lined up and press-fitted from C in the direction opposite to the direction of travel. That is, by sliding movement of the slide frame 15 and turning of the mast 20, as shown in FIG. Move to the position to press fit. Then, the pile P (the first pile Pc-1 in the direction opposite to the bending direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is pressed into the ground.

Here, due to the rotation of the casing chuck 27, the first pile Pc-1 in the direction opposite to the bent direction is bent to the right by 90° with respect to the first pile P1 toward the front from the corner portion C. . In addition, as enlarged in FIG. 24(a), the joint at the left end of the first pile Pc-1 in the direction opposite to the bent direction is positioned at the corner C, but The first pile Pc-1 in the direction opposite to the bending direction is press-fitted into the ground without engaging the front end joint of the first pile P1 and the right end joint of the first pile Pc1 after bending. To go.

In addition, once the first pile Pc-1 in the direction opposite to the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the grip of the first pile Pc-1 in the direction opposite to the direction bent is released. The extension operation of the cylinder 30 raises the chuck 25 . Then, at the position where the chuck 25 is raised, the first pile Pc-1 in the direction opposite to the bending direction is gripped again. Then, the chuck 25 is lowered by the shortened operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bending direction is further press-fitted into the ground. By repeating this operation, the first pile Pc-1 in the direction opposite to the bending direction is press-fitted into the ground to a predetermined depth, and the press-fitting of the first pile Pc-1 in the direction opposite to the bending direction is completed. .

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. A second pile Pc-2 in the direction opposite to the traveling direction from C is aligned with the first pile Pc-1 in the direction opposite to the bent direction and press-fitted. That is, by sliding movement of the slide frame 15 and turning of the mast 20, as shown in FIG. Move to the position to press fit. Then, the pile P (the second pile Pc-2 in the direction opposite to the bending direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is pressed into the ground.

In addition, the left end joint of the second pile Pc-2 in the opposite direction to the bent direction is engaged with the right end joint of the first pile Pc-1 in the opposite direction to the bent direction. The second pile Pc-2 in the opposite direction is pressed into the ground.

In addition, once the second pile Pc-2 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the second pile Pc-2 in the direction opposite to the direction bent is released, The extension operation of the cylinder 30 raises the chuck 25 . Then, at the position where the chuck 25 is raised, the second pile Pc-2 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is further press-fitted into the ground. By repeating this operation, the second pile Pc-2 in the direction opposite to the bent direction is press-fitted into the ground to a predetermined depth, and the press-fitting of the second pile Pc-2 in the direction opposite to the bent direction is completed. .

Next, while the saddle 10 of the pile press-in machine 1 is fixed to the second pile P2, the third pile P3, and the fourth pile P4, the corner part in the row after the direction in which the piles P are arranged is bent. A second pile Pc2 is press-fitted from C in the direction of travel. That is, by sliding movement of the slide frame 15 and turning of the mast 20, the chuck 25 moves to a position where the second pile Pc2 is press-fitted in a direction bent 90° to the left from the corner portion C, as shown in FIG. . Then, the pile P (the second pile Pc2 in the bent direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc2 in the bent direction is pressed into the ground.

In addition, when the second pile Pc2 bent by the stroke of the cylinder 30 is pressed into the ground, the grip of the second pile Pc2 bent is temporarily released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the second stake Pc2 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the second pile Pc2 in the bent direction is further press-fitted into the ground. By repeating such an operation, the second pile Pc2 in the bent direction is pressed in to a depth at which at least the pile press-in machine 1 can be supported.

Next, with the chuck 25 gripping the second pile Pc2 in the bent direction, the clamps 11 below the saddle 10 are released. Next, while the second pile Pc2 in the bent direction is held by the chuck 25, the cylinder 30 is shortened to move the pile press-in machine 1 (saddle 10) to the second pile with the chuck 25 as a fulcrum. Lift above the pile P2, the third pile P3, and the fourth pile P4. Next, as shown in FIG. 27, while the chuck 25 is holding the second pile Pc2 in the bent direction, the pile press-in machine 1 (saddle 10 ) above the first pile Pc1 in the curved direction, the first pile Pc-1 in the opposite direction to the curved direction, and the second pile Pc-2 in the opposite direction to the curved direction. By extending the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and three clamps 11 provided at the bottom of the saddle 10 clamp the first pile Pc1 in the bent direction, A first pile Pc-1 in the opposite direction and a second pile Pc-2 in the opposite direction to the bent direction are clamped, respectively, and a saddle 10 of the pile press-in machine 1 is set to the existing pile P in one of the bent directions. It is fixed to the first pile Pc1, the first pile Pc-1 in the direction opposite to the bent direction, and the second pile Pc-2 in the opposite direction to the bent direction to take reaction force. After that, the second pile Pc2 in the bent direction is pressed into the ground, the second pile Pc2 in the bent direction is pressed into the ground to a predetermined depth, and the second pile Pc2 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is set to the first pile Pc1 in the bent direction, the first pile Pc-1 in the opposite direction to the bent direction, and the second pile Pc- in the opposite direction to the bent direction. 2, the third pile Pc3 is press-fitted in the direction of travel from the corner portion C in the row after the direction in which the piles P are arranged is bent. That is, by sliding the slide frame 15, as shown in FIG. 28, the chuck 25 moves to a position where the third pile Pc3 is press-fitted in a direction bent 90 degrees to the left from the corner portion C. As shown in FIG. Then, the pile P (the third pile Pc3 in the bent direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the third pile Pc3 in the bent direction is pressed into the ground.

Further, when the third pile Pc3 in the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the grip of the third pile Pc3 in the bent direction is once released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the third stake Pc3 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the third pile Pc3 in the bent direction is further press-fitted into the ground. By repeating such an operation, first, the third pile Pc3 in the bent direction is press-fitted to a depth at which at least the pile press-fitting machine 1 can be supported.

Next, with the chuck 25 gripping the third pile Pc3 in the bent direction, the clamps 11 below the saddle 10 are released. Next, the pile press-in machine 1 (saddle 10) is bent with the chuck 25 as a fulcrum by shortening the operation of the cylinder 30 while holding the third pile Pc3 in the bent direction with the chuck 25. Lift above the first pile Pc1 in the direction, the first pile Pc-1 in the opposite direction to the bent direction, and the second pile Pc-2 in the opposite direction to the bent direction. Next, as shown in FIG. 29, the pile press-fitting machine 1 (saddle 10) is bent by sliding the slide frame 15 while holding the third pile Pc3 in the bent direction with the chuck 25. It is moved above the second pile Pc2 in the direction, the first pile Pc1 in the bent direction, and the first pile Pc-1 in the opposite direction to the bent direction.

Then, by extending the cylinder 30, the pile press-in machine 1 (saddle 10) is lowered, and the three clamps 11 provided at the bottom of the saddle 10 lift the second pile Pc2 in the bent direction. The first pile Pc1 and the first pile Pc-1 in the direction opposite to the bent direction are clamped, respectively. This buffers the pile press-in machine 1 (saddle 10) and may interfere with the descent. That is, as described above, in the fixed claw 12 and the movable claw 13 that constitute the clamp 11, the size of the movable claw 13 is larger than the size of the fixed claw 12 because the movable claw 13 has a built-in cylinder. ing. Therefore, when clamping the upper end of the existing pile P with the clamp 11, the side on which the movable claw 13 is arranged requires a wider space than the side on which the fixed claw 12 is arranged.

However, in the corner portion C, since the piles P in the row before the bending of the piles P and the piles P in the row after the bending of the piles P intersect each other, the movable claw 13 is arranged. There may not be enough space for For example, as shown in FIG. 29, at the corner portion C, there is a space S sandwiched between the first pile P1 in front of the corner portion C and the first pile Pc-1 in the direction opposite to the bending direction. narrow. For this reason, the movable claw 13 does not enter the space S, which may hinder the downward movement of the pile press-in machine 1 (saddle 10). In such a case, if the upper end portion of the first pile P1 is cut before the corner portion C, the pile P will be lost. In addition, it is also necessary to repair the cut portion by welding or the like.

Therefore, before lowering the pile press-in machine 1 (saddle 10), the direction of the saddle 10 is rotated by 180° in plan view as shown in FIG. (In order to prevent buffering between the saddle 10 and the chuck 25, as shown in FIG. 28, the first pile Pc1 in the bent direction and the first pile Pc- 1. Rotate the saddle 10 before self-propelled in a state above the second pile Pc-2 in the direction opposite to the bent direction.) As a result, the first pile P1 and A fixed claw 12, which is smaller than the movable claw 13, enters the space S sandwiched between the first pile Pc-1 in the direction opposite to the bent direction. As a result, the pile press-in machine 1 (saddle 10) can be lowered smoothly.

After rotating the saddle 10 by 180 degrees in plan view, the cylinder 30 is extended to lower the pile press-in machine 1 (saddle 10). Then, by three clamps 11 provided at the bottom of the saddle 10, the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile Pc- in the opposite direction to the bent direction. 1 are held, and the saddle 10 of the pile press-in machine 1 is attached to the existing pile P, which is the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile in the opposite direction to the bent direction. is fixed to the stake Pc-1 to take reaction force. After that, the third pile Pc3 in the bent direction is pressed into the ground, and the third pile Pc3 in the bent direction is pressed into the ground to a predetermined depth, and the third pile Pc3 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is fixed to the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile Pc-1 in the opposite direction to the bent direction. In the state of , the second pile Pc-2 is pulled out in the direction opposite to the bent direction. That is, after the chuck 25 first rises above the third pile Pc3, the turning of the mast 20 causes the chuck 25 to lift the second pile Pc-2 in the direction opposite to the bending direction, as shown in FIG. Move up. Then, the chuck 25 is lowered by the shortened operation of the cylinder 30, and the casing chuck 27 of the chuck 25 grips the second pile Pc-2 pressed into the ground in the direction opposite to the bent direction. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is pulled out from the ground.

In addition, when the second pile Pc-2 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pulled out from the ground, the grip of the second pile Pc-2 in the direction opposite to the direction bent is released. The shortened operation of cylinder 30 lowers chuck 25 . Then, at the position where the chuck 25 is lowered, the second pile Pc-2 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the second pile Pc-2 in the direction opposite to the bent direction is further pulled out from the ground. By repeating this operation, the second pile Pc-2 in the direction opposite to the bent direction is completely pulled out from the ground, and the pulling out of the second pile Pc-2 in the direction opposite to the bent direction is completed.

Next, the saddle 10 of the pile press-in machine 1 is fixed to the second pile Pc2 in the bent direction, the first pile Pc1 in the bent direction, and the first pile Pc-1 in the opposite direction to the bent direction. In this state, the fourth pile Pc4 is press-fitted in the direction of travel from the corner portion C in the row after the direction in which the piles P are arranged is bent. That is, by sliding movement of the slide frame 15 and turning of the mast 20, the chuck 25 moves to a position where the fourth pile Pc4 is press-fitted in a direction bent 90° to the left from the corner portion C, as shown in FIG. . Then, the pile P (fourth pile Pc4 in the bent direction) to be press-fitted next to the casing chuck 27 of the chuck 25 is gripped in a predetermined posture. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the fourth pile Pc4 in the bent direction is pressed into the ground.

Further, when the fourth pile Pc4 in the direction bent by the stroke of the cylinder 30 is press-fitted into the ground, the fourth pile Pc4 in the bent direction is once released, and the chuck 25 is lifted by the extension operation of the cylinder 30. Let Then, at the position where the chuck 25 is lifted, the fourth stake Pc4 in the bent direction is gripped again. Then, the chuck 25 is lowered by shortening the operation of the cylinder 30, and the fourth pile Pc4 in the bent direction is further press-fitted into the ground. By repeating such an operation, first, the fourth pile Pc4 in the bent direction is press-fitted to a depth at which at least the pile press-fitting machine 1 can be supported.

Next, with the chuck 25 gripping the fourth pile Pc4 in the bent direction, the clamps 11 below the saddle 10 are released. Next, the pile press-in machine 1 (saddle 10) is bent with the chuck 25 as a fulcrum by shortening the operation of the cylinder 30 while holding the fourth pile Pc4 in the bent direction with the chuck 25. Lift the second pile Pc2 in the direction, the first pile Pc1 in the curved direction, and the first pile Pc-1 in the opposite direction to the curved direction. Next, as shown in FIG. 33, the pile press-in machine 1 (saddle 10) is bent by sliding the slide frame 15 while holding the fourth pile Pc4 in the bent direction with the chuck 25. It is moved above the third pile Pc3 in the direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction.

Also in this case, as shown in FIG. 33, after rotating the direction of the saddle 10 by 180° in plan view, the pile press-in machine 1 (saddle 10) is lowered by extending the cylinder 30. Also in this case, the saddle 10 is rotated before the press-fitting machine 1 is self-propelled. Three clamps 11 provided at the bottom of the saddle 10 clamp the third pile Pc3 in the bent direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction, respectively. , the saddle 10 of the pile press-in machine 1 is fixed to the third pile Pc3 which is the existing pile P, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction to take reaction force. After that, the fourth pile Pc4 in the bent direction is pressed into the ground, and the fourth pile Pc4 in the bent direction is pressed into the ground to a predetermined depth, and the fourth pile Pc4 in the bent direction is pressed into the ground. finish.

Next, the saddle 10 of the pile press-in machine 1 is fixed to the third pile Pc3 in the bent direction, the second pile Pc2 in the bent direction, and the first pile Pc1 in the bent direction. Pull out the first pile Pc-1 in the direction opposite to the direction of the first pile. That is, after the chuck 25 first rises above the fourth pile Pc4, the rotation of the mast 20 causes the chuck 25 to lift the first pile Pc-1 in the direction opposite to the bending direction, as shown in FIG. Move up. Then, the chuck 25 is lowered by shortened operation of the cylinder 30, and the casing chuck 27 of the chuck 25 grips the first pile Pc-1 pressed into the ground in the direction opposite to the bent direction. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is pulled out from the ground.

In addition, once the first pile Pc-1 in the direction opposite to the direction bent by the stroke of the cylinder 30 is pulled out from the ground, the grip of the first pile Pc-1 in the direction opposite to the direction bent is released. The shortened operation of cylinder 30 lowers chuck 25 . Then, at the position where the chuck 25 is lowered, the first pile Pc-1 in the direction opposite to the bent direction is gripped again. Then, the chuck 25 is lifted by the extension operation of the cylinder 30, and the first pile Pc-1 in the direction opposite to the bent direction is further pulled out from the ground. By repeating this operation, the first pile Pc-1 in the direction opposite to the bent direction is completely pulled out from the ground, and the pulling out of the first pile Pc-1 in the direction opposite to the bent direction is completed.

Next, as shown in FIG. 35, the chuck 25 moves to a position where the fifth pile Pc5 is press-fitted in a direction bent 90° to the left from the corner portion C. Then, as shown in FIG. After that, the fifth and subsequent piles Pc5 in the curved direction are press-fitted in sequence. In this way, a row of piles is constructed in which the direction in which the piles P are arranged at the corner portion C is bent 90° to the right.

According to the pile press-in machine 1 according to the embodiment of the present invention described above, the first pile Pc press-fitted in the direction opposite to the traveling direction from the corner portion C in the row after the pile P is bent. -1 and the second pile Pc-2 are sandwiched to obtain a reaction force, so that the second pile Pc2 and the third pile in the traveling direction from the corner part C in the row after the direction in which the piles P are arranged is bent. Pc3 or the like can be smoothly press-fitted. In addition, at the corner portion C where the direction in which the piles P are arranged is curved, the first pile P1 on the front from the corner portion C, the first pile Pc1 after bending, and the first pile Pc-1 in the direction opposite to the bending direction. are arranged to intersect each other, and at the corner portion C, when the saddle 10 to which a plurality of clamps 11 composed of the fixed claws 12 and the movable claws 13 are attached is fixed to the existing pile P, the movable claws 13 of the clamps 11 are placed at the corners There is a risk that the first pile P1 in front of the part C, the first pile Pc1 after bending, and the first pile Pc-1 in the opposite direction to the bending direction may buffer. In such a case, by rotating the orientation of the saddle 10 by 180° in plan view, it is possible to avoid such clamps 11 from buffering those existing piles P (P1, Pc1, Pc-1).

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive various modifications or modifications within the scope of the technical idea described in the claims, and these are also within the technical scope of the present invention. be understood to belong to

For example, in the embodiment of the present invention described above, an example was described in which three existing piles P were clamped to obtain a reaction force. Two or one may be used. Also, after press-fitting the third pile Pc3 in the bent direction, the second pile Pc-2 in the opposite direction to the bent direction is pulled out, and then, after press-fitting the fourth pile Pc4 in the bent direction, An example of pulling out the first pile Pc-1 in the direction opposite to the bent direction is shown. However, the pulling out of the piles Pc-1 and Pc-2 in the direction opposite to the bent direction is, for example, as shown in FIG. The two piles may be pulled out together while the reaction force is taken by the first pile Pc1 in the opposite direction. If the two wires are pulled out together in this way, the labor can be saved.

In the above description, a U-shaped steel sheet pile is shown as an example of the pile P, but the present invention can also be applied to a pile press-in machine for press-fitting other piles such as hat-shaped steel sheet piles and concrete sheet piles.

INDUSTRIAL APPLICABILITY The present invention can be applied to a pile press-in machine that presses a pile into the ground and pulls the pile out of the ground.

1 Pile press-in machine P Pile 10 Saddle 11 Clamp 12 Fixed claw 13 Movable claw 15 Slide frame 16 Base shaft 20 Mast 21 Lifting guide 25 Chuck 26 Chuck frame 27 Casing chuck 30 Cylinder 31 Opening 32 Fixed claw 33 Movable claw

Claims (5)

A press-in method in which an existing pile is gripped by a pile press-in machine and a reaction force is taken to sequentially press-in the pile into the ground,
The pile press-in machine includes a saddle attached with a plurality of clamps composed of fixed claws and movable claws,
The existing piles in the row before the piles are bent are sandwiched to take the reaction force, and the first pile is placed in the direction of travel from the corner of the row after the piles are bent. The first and second piles are lined up and press-fitted in the direction opposite to the direction of travel from the corner part of the row after bending,
Next, press-fit the second pile in the direction of travel from the corner part in the row after the direction in which the piles line up is bent to a depth where the second pile can support at least the pile press-in machine,
Next, the pile press-in machine is moved by taking the supporting force of the second pile, and the first pile and the direction of the piles are moved in the direction of travel from the corner part in the row after the direction of the piles is bent. The first and second piles are sandwiched in the direction opposite to the direction of travel from the corner part of the row after bending to take reaction force, and the third pile from the corner part of the row after bending the direction in which the piles line up press-fit the piles of
Next, the pile press-in machine is moved by taking the supporting force of the third pile, and the first and second piles and the piles are moved in the direction of travel from the corner part in the row after the direction in which the piles are arranged is bent. The direction of the saddle is rotated 180° in a plan view when the first pile is clamped in the direction opposite to the traveling direction from the corner part in the row after the line is bent to take a reaction force. method of press-fitting piles. A pile press-fitted in the direction of travel from the corner part of a row after the direction of pile alignment is bent and a pile press-fitted in the direction opposite to the direction of travel are sandwiched to take a reaction force, and the direction of pile alignment is bent. 2. The method of press-fitting piles at corners according to claim 1 , wherein the piles press-fitted in the direction opposite to the direction of travel are pulled out from the corners in the row after the pile. The first and second piles in the direction of travel from the corner in the row after the direction of pile alignment is bent, and the first pile in the direction opposite to the direction of travel from the corner in the row after the direction of pile alignment is bent. The corner portion according to claim 2 , wherein the pile is clamped to take a reaction force, and the second pile is pulled out in the opposite direction to the traveling direction from the corner portion in the row after the piles are bent. method of press-fitting piles in Pile press-fitted in the direction of travel from the corner part of the row after the direction of pile alignment is bent is pinched to take reaction force, and the pile direction is bent in the direction opposite to the direction of travel from the corner part of the row after the direction of pile alignment is bent. 2. The method of press-fitting a pile at a corner according to claim 1 , wherein the pile that has been press-fitted is pulled out. From the corner part of the row after the direction of the piles is bent, the first, second and third piles are sandwiched in the direction of travel to take the reaction force, and from the corner part of the row after the direction of the piles is bent 5. The method of press-fitting a pile at a corner according to claim 4, wherein the first pile is pulled out in the direction opposite to the direction of travel.

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