JP2826342B2 - Pile press-in and pull-out method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a press-in and pull-out of a pile, such as a steel sheet pile, used in various civil works and the like, in which a pile can be pressed and pulled close to a building, an obstacle or the like. Concerning the construction method.

(Prior art) When a pile is pressed into the ground, a pile press-in and pull-out machine is used.
At this time, the upper end of the existing pile is clamped by a clamp provided at the lower part of the body such as a pile press-in / draw-out machine, and the body is held on the pile. Conventionally, when moving forward on an existing pile, the claws are repeatedly moved left and right in a direction perpendicular to the existing pile row, and the entire jaws are repeatedly moved up and down and back and forth with respect to the existing pile row. The construction method is being promoted.

Therefore, if a building or an obstacle is adjacent to the press-fitting work site, at least a space equivalent to the left and right movement width of each clamp must be provided from the building or the obstacle, and a pile press-in and pull-out machine must be installed. There was no construction method for press-fitting piles adjacent to buildings.

(Problems to be Solved by the Invention) As described above, according to the conventional pile press-in / pull-out method, the clamp collides with an obstacle such as a building when the apparatus is moved back and forth, and the pile is pressed into close proximity to the building or the like. It was impossible to carry out work such as drawing.

An object of the present invention is to provide a construction method of a pile press-in / pull-out machine which solves such a problem and enables a press-in / pull-out operation of a pile adjacent to an obstacle or the like.

(Means for Solving the Problems) In order to solve the above problems, a base provided with a clamp for holding an existing pile, and a slide base provided on the base so as to be movable back and forth and having a mast erected on the upper surface. And, by a pile press-in / pull-out machine having a chuck that presses up or down along the mast to pinch and squeeze the pile freely, in a pile press-in / pull-out method for moving the existing pile and press-pulling / pulling the pile, The chuck includes a storage portion that can store the web of the pile exposed to the outside, and a holding mechanism that holds a side or a flange of the pile stored in the storage portion, and the clamp includes an existing pile. A pinch mechanism that can pinch the side of the pile inward from the web is formed, and a hole for inserting the connection part of the pile is formed in a fixing claw of the pinch mechanism. It is located at a width position where it can be moved By inserting the connection part of the existing pile into the hole of the fixed claw, the fixed claw is stored between the flanges of the adjacent piles, and the existing pile is clamped by The web is exposed to hold the pile.

(Operation) A base provided with a clamp for holding an existing pile at a lower portion, a slide base provided on the base so as to be movable back and forth and having a mast standing on an upper surface, and a chuck movable up and down along the mast. The pile press-in and pull-out machine will be erected on an existing pile close to an obstacle.

At this time, the upper end of the existing pile is clamped by the clamp with the surface of the fixing claw of the clamp being the same as or inside the surface of the existing pile so that the clamp does not come into contact with an obstacle or the like. Thereafter, the surface of the press-fitting pile is sandwiched by the chuck so that the surface of the press-fitting pile is the same as or protrudes from the surface of the chuck, and the press-fitting pile is connected and pressed into the front end of the existing pile while avoiding contact between the chuck and the existing pile.

Then, the slide base is advanced by the width of the pile, a new press-fitting pile is clamped by the chuck, and the press-fitting pile is press-fitted to an appropriate depth by being connected to the existing pile at the front end, and then the press-fitting of the pile is temporarily stopped. Thereafter, the clamp holding the existing pile is released, raised and advanced by the width of the pile, and the clamp is lowered again to clamp the existing pile. Thereafter, the chuck is lowered again to press the press-fitting pile close to an obstacle or the like.

When the existing pile is to be clamped in the above, a hole is provided in the fixing claw of the clamp, and the connection portion of the existing pile is inserted into the hole.

(Example) Next, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a pile press-in / pull-out machine used in this embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG.
Is a plan view of a pile press-in / draw-out machine, and FIG. 3 (B) is a plan view of a pile press-in / pull-out machine during press-fitting of a steel sheet pile at a corner portion, and FIG.
Is a sectional view taken along the line III-III in FIG. 3 (A), FIG. 4 is a plan view of a clamp in which a grip of a steel sheet pile is clamped, and FIGS. 5 and 6 are explanatory views of the operation of this embodiment. is there.

First, the configuration of the pile press-in and pull-out machine A used in the present embodiment will be described. The pile press-in / pull-out machine A used in this embodiment has a clamp attached to one side end of a base 1 having a slide base 1a slidably fitted on the upper part thereof as shown in FIGS. At the lower end of the base 1 consisting of a mechanism and a chuck 7 attached to the end of a mast 2 rotatably provided on the slide base 1a, three clamps 10 are vertically provided. As shown in FIG. 2, the mounting position of the base 10 is such that the outer surface 10f of the clamp 10 on the side of the fixed claw 11 is
A clamp 10 is provided at an end of the base 1 so as to be substantially on the same plane as f. However, the clamp 10 may be attached while being protruded or retracted from the outer surface 1f of the base 1.

The clamp 10 includes a fixed claw 11, a movable claw 12, and a moving mechanism for the movable claw 12. In this embodiment, the moving mechanism includes a cylinder 10a and a rod 10b that are operated by liquid pressure.

The thickness Q of the fixing claw 11 is formed not more than the height M of the steel sheet pile P, and the width R is also the distance N between the flanges of the adjacent steel sheet piles P.
The following is assumed. Therefore, when the steel sheet pile P is clamped, the fixing claw 11 is housed between the flanges of the adjacent steel sheet piles P and does not protrude from the surface of the steel sheet pile P.

Therefore, the upper end of the existing steel sheet pile P, which is press-fitted close to the adjacent object S, is sequentially clamped by the clamps 10, and the pile press-in / pull-out machine can be advanced along the row of piles.

In addition, a new pile is clamped by the chuck 7, and the existing steel sheet pile P
When the new steel sheet pile P is pressed into the ground while matching the grip of the new sheet pile P with the grip of
Steel sheet piles can be inserted one after another without colliding with the steel sheet pile.

In this manner, the press-fitting / pulling-out operation of the steel sheet pile P can be performed in a state of being close to the adjacent object S.

The base 1 has a built-in cylinder 1b for moving the slide base 1a back and forth.

On the other hand, the mast turning mechanism 5 is configured in the mast 2 provided on the slide base 1a.

The mast turning mechanism 5 is composed of a motor 5a having a gear 5c fixed at the tip of a shaft, and a rotating shaft 5b formed with an upper gear 5d meshing with the gear 5c. It is fixed to the base 1a.

At the front end of the mast 2 is provided an elevating mechanism 3 for moving the arm 4 up and down.
And the lower end of the rod 3b is fixed to the lower front end of the mast 2.

A chuck 7 for holding a press-fit steel sheet pile is rotatably attached to the tip of the arm 4 by a rotating mechanism 6 built in the arm 4.

The rotating mechanism 6 includes a motor 6a having a gear 6c fixed at the end of a shaft, and a rotating shaft 6b having a gear 6d meshing with the gear 6c formed on an upper portion. A chuck 7 is provided at a lower end of the rotating shaft 6b. The configuration is fixed.

The chuck 7 has a substantially rectangular parallelepiped shape as shown in FIG. 3, and has one side open to form a storage portion 7m for the steel sheet pile P.
A holding mechanism for holding both side portions Pb of the steel sheet pile P is built inside both ends of the storage portion 7m. The structure of the holding mechanism includes a cylinder 7c, a movable claw 7d, and a fixed claw 7b.

When holding the steel sheet pile P, the side portions Pb of the steel sheet pile P are inserted into the insertion grooves 50 formed on both sides of the storage portion 7m, and the web of the steel sheet pile P is held.
Pc is held between the fixed claw 7b and the movable claw 7d of the holding mechanism while the Pc is exposed to the outside from the chuck 7.

The clamping mechanism may clamp the portion between the web and the grip, for example, a flange, in order to clamp the web of the steel sheet pile P in a state exposed to the outside from the chuck. In addition to the present embodiment, in the case of a Z-type steel sheet pile, a clamping mechanism that clamps the web with the flange exposed to the outside is used.

Next, the present embodiment will be described using the pile press-in and pull-out machine A having the above configuration.

Clamp formed at the lower part of base 1 as shown in FIG.
At 10, the pile press-in and pull-out machine A is fixed to the upper end of the existing steel sheet pile P.

Next, both sides of the pressed sheet pile P are inserted into the pile insertion grooves 50 of the chuck 7.
Insert Pb and operate cylinder 7c to move movable claw 7d and fixed claw.
While holding the steel sheet pile P with 7b, the motor of the mast turning mechanism 5
By rotating the motor 6a of the arm 4 and the motor 6a of the arm 4, the grip of the press-fit steel sheet pile P held by the chuck is moved to the third position.
As shown in Fig. (A), it is matched with the grip of the existing steel sheet pile.

When the rod 3b is retracted by operating the cylinder 3a in the arm 4 in this state, the chuck 7 is lowered, and the steel sheet pile P held by the chuck 7 is pressed into the ground. After the press-fitting, the chuck 7 is opened, and the cylinder 1b is operated to advance the chuck 7 together with the mast 2 and the slide frame 1a by the pile width. Thereafter, a new steel sheet pile P is inserted into the chuck 7, and the grip of the new steel sheet pile P is inserted into the press-fit steel sheet pile P.
And press it into the ground. (See FIG. 5) When the steel sheet pile P is about half pressed into the ground, the clamp 10 releases the clamped state of the existing steel sheet pile P. Clamp
10 operates the lifting mechanism 3 with the steel sheet pile P opened,
Mast 2, slide frame connected to rod 3b
1a, the entire base 1 is moved upward. After the lowermost end of the clamp 10 moves above the existing steel sheet pile, the cylinder 1b for mast front and rear is operated to move the base 1 forward by the pile width along the slide base 1a as shown in FIG. . Thereafter, the base 1 is moved downward by operating the cylinder 3a, and the existing steel sheet pile is clamped again by the clamp 10.

After the reaction force at the time of the pile press-in is thus obtained again, the steel sheet pile P which is being pressed and held by the chuck 7 is completely pressed into the ground and returns to the state shown in FIG.

In this embodiment, the clamp 10 is located at the end of the base 1 when the steel sheet pile P is press-fitted or when the apparatus body is moved. That is, when clamping the sheet pile P, the clamp 10
Is fixed in the flange of the steel sheet pile P connected thereto, the surface of the fixed claw 11 does not protrude from the surface of the steel sheet pile P. Therefore, the adjacent object S close to the existing steel sheet pile P
The pile press-in / pull-out machine can be held on the existing steel sheet pile P without colliding with the clamp 10. Further, as shown in FIG. 4, since the hole 60 is formed in the center of the fixing claw 11, the grip, which is the connecting portion between the steel sheet piles P, is inserted into the hole 60 to clamp the steel sheet piles P, P. Is possible.

In this case, the fixing claws 11 of the clamp 10 are adjacent to each other.
Since a reaction force is obtained by pinching the steel sheet piles P, the reaction force is doubled as compared with the case where one steel sheet pile P is pinched.

Further, when the chuck 7 also holds the steel sheet pile P, the steel sheet pile P is housed in the storage portion 7m, and the web Pc of the steel sheet pile P is held while being exposed to the outside from the opening of the chuck 7.
The chuck 7 does not collide with the adjacent object S. Therefore, the press-fitting / pulling-out operation can be continuously performed while the steel sheet pile P is close to the adjacent object S.

Even when the base 1 is raised or advanced, the clamp 10 does not project from the surface of the existing steel sheet pile P, so that it does not collide with the adjacent object S.

The chuck 7 also stores the steel sheet pile P inside the storage portion 7m and clamps the web Pc of the steel sheet pile P in a state of being exposed to the outside from the opening of the chuck 7, so that the outer end of the chuck 7 collides with the adjacent object S. Without this, the work of press-fitting the steel sheet pile P can be performed while holding the steel sheet pile P close to the adjacent object S.

By repeating the above operation, steel sheet piles can be continuously pressed into the ground one after another. Also, if the procedure reverse to the above is taken, the pressed steel sheet pile can be sequentially pulled out.

Further, according to the present embodiment, it is possible to press-fit a steel sheet pile into a corner or a curve. That is, as shown in FIG. 3 (B), the motor 5a is operated to rotate the mast 2 about the rotation shaft 5b and the slide base 1a is slightly rotated, and then the motor 6a in the arm 4 is rotated. The chuck 7 is operated to rotate the chuck 7 substantially 90 degrees about the rotation shaft 6b. At this time, simultaneously operate the cylinder 1b in the base 1 to
Move 1a forward, determine the press-fit position of the steel sheet pile,
The grip of the new steel sheet pile sandwiched between the chucks 7 is press-fitted while matching the grip of the existing steel sheet pile P.

As described above, according to the present embodiment, it is possible to continue the press-fitting / pulling-out operation of the pile in the state adjacent to the building, the obstacle, and the like, and to rotate the mast 2 and the chuck 7 as needed to obtain a right angle The effect is that press-fitting of a steel sheet pile having a sharp curve or a sharp curve becomes possible easily and quickly.

(Effects of the Invention) As described above, according to the method for press-fitting / pulling out a pile according to the present invention, a pile press-fitting / pulling-out machine is held by holding the upper end of an existing pile pressed in close to an adjacent obstacle or the like. In addition, there is an effect that the press-fitting / pulling-out work of the pile can be quickly and reliably continued in close proximity to a building or an obstacle without damaging it.

[Brief description of the drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a front view of a pile press-in and pull-out machine used in the method of the present embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. FIG. 3 (A) is a plan view of a pile press-in / pull-out machine, FIG. 3 (B) is a plan view of a pile press-in / pull-out machine during press-in of a steel sheet pile at a corner, and FIG. 3 (C) is FIG. FIG. 4A is a sectional view taken along the line III-III, FIG. 4 is a plan view of the clamp with the grip of the steel sheet pile being clamped,
The figure is an operation explanatory view. DESCRIPTION OF SYMBOLS 1 ... Base, 1a ... Slide base 2 ... Mast, 3 ... Lifting mechanism 4 ... Arm, 5 ... Mast turning mechanism 6 ... Rotating mechanism, 7 ... Chuck 10 ... Clamp, 11 ... Fixed claw, 12 ... Movable claw A ... Pile press-in / pull-out machine

Claims (1)

(57) [Claims] 1. A base provided with a clamp for holding an existing pile, a slide base provided on the base so as to be movable back and forth and having a mast upright on an upper surface, and a pile movable up and down along the mast. In a pile press-in / pull-out method in which a pile is pressed and pulled by using a pile press-in / pull-out machine having a chuck for pinching and press-in or pull-out, the chuck exposes a pile web outward. And a clamping mechanism for clamping a side portion or a flange of a pile stored in the storage portion, and the clamp is configured such that a side portion of the pile is located inside a web of an existing pile. Equipped with a pinching mechanism that can pinch, a hole for inserting the connection part of the pile is formed in the fixing claw of this pinching mechanism, and the outer surface is at a width position where the body can move back and forth inside the web. Connection of existing piles with the pile press-in / draw-out machine arranged Inserting the part into the hole of the fixed claw, storing the fixed claw between the flanges of the adjacent piles to clamp the existing pile, and exposing the web outside the chuck to clamp the pile. Pile press-in and pull-out method.