JPH0447736B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is an anti-press-fitting method that allows a plurality of piles such as steel sheet piles to be loaded onto a base and to efficiently supply or remove the piles from an elevating head. This is related to a pulling machine, and in particular, it can automatically supply and remove piles even at pile driving sites where there are obstacles above, such as under bridges, making it impossible to use long piles, and where it is difficult to supply piles. The present invention relates to a resistance press-in and pull-out machine that can efficiently perform pile press-in and pull-out operations.

(Prior Art) In civil engineering work for constructing cofferdams, retaining walls, etc., various types of steel sheet piles are arranged in a line and driven into the ground, and in some cases, they are pulled out and removed. The anti-press-in and pull-out machines used in this type of work are used to fix the entire device onto piles that have already been driven into the ground (existing piles) and carry out anti-press-in or pull-out operations. There is a self-propelled press-in and pull-out machine that moves on existing piles.

This type of anti-press-in extraction machine generally has a self-propelled mechanism on the existing pile, a base that can move back and forth, left and right, a column that stands on the base, and a column that slides up and down along the column to ground the pile. It consists of an elevating head that performs medium press-in and pull-out. However, with this type of anti-pressure-fitting and extracting machine, if there is an obstacle above, such as under a bridge, the support that guides the lifting head up and down will get in the way, so it cannot be applied to places where space is restricted above. Ta.

Therefore, the inventor of the present invention proposed patent application No. 58-195093
No. 60-88722) has already proposed a pile press-in and pull-out machine that eliminates the pillars in the conventional structure.

The proposed device includes a saddle that is gripped and fixed to an existing pile, a back-and-forth movable table provided on the saddle that is movable back and forth, a left-right movable table that can be moved left and right, and an elevating head that moves up and down with respect to the left-right movable table. When the elevating head is lowered to the lowest position, the height thereof is approximately equal to that of the longitudinally movable table and the horizontally movable table.

This device configuration not only makes it relatively easy to drive or pull out piles even in locations where height is restricted due to obstacles above, but also maximizes the length from the device to the obstacle above. This has the advantage that longer stakes can be used.

(Problems to be Solved by the Invention) However, when press-fitting or pulling out piles such as spliced sheet piles using the above-proposed anti-press-in/pulling machine, only short piles can be used due to restrictions due to overhead obstacles such as bridges. Moreover, it is necessary to lift the pile with an auxiliary lifting machine such as a chain block or mini-combo to load or remove it from the lifting head, which further limits the length of the pile. In order to press fit inside, it was necessary to repeatedly load short piles. In addition, operate the above-mentioned lifting machine,
A moving worker is required, and the machine cannot be easily applied when performing anti-press-fitting or pulling out on water.

Furthermore, the problem becomes more serious when chain blocks, mini-combos, etc. for hoisting piles become unusable in confined spaces where there are obstacles not only above but also on the sides. In other words, if the above-mentioned lifting machine cannot be used, the efficiency of the anti-pressure-fitting and pulling-out work will be significantly reduced, or the work will become impossible.

Therefore, the purpose of the present invention is to enable continuous and automatic loading and unloading of piles in the lifting head during anti-pressure-fitting and pulling out, and also to enable the loading and unloading of piles for relatively long piles even in places where there are obstacles above, such as under bridges. To provide a anti-press-fitting and extracting machine capable of performing anti-press-fitting and extracting using piles, shortening working time and reducing the number of working personnel, and dramatically increasing working efficiency.

(Means for Solving the Problems) In order to achieve the above object, the anti-pressure-fitting and extracting machine of the present invention includes a saddle having a clamp for gripping an existing pile, and a base provided so as to be movable back and forth and left and right on the saddle. and an elevating head which is provided in the front part of the base so as to be movable up and down and can be lowered to a height approximately equal to that of the base;
A pile holding frame that holds a plurality of piles to be loaded on the base in an erected state, and piles that are installed on both sides of the pile holding frame and hold the loaded piles at the side ends and move them parallelly above the lifting head. It is characterized by consisting of a mobile device.

(Function) The pile press-in and pull-out are performed with the pile press-in and pull-out machine fixed on the existing pile using the clamp provided on the saddle. In the case of pile press-fitting, the lifting head is lowered to the lowest position at the pile press-fitting point and positioned at approximately the same height as the base. Among a plurality of piles, such as sheet piles, which are housed upright in a pile holding frame on a base, the foremost pile is held by a pile moving device provided on the side of the pile holding frame. While holding the pile, move the pile moving device forward to move the held pile in parallel and position it above the lifting head.

Next, the elevating head is raised, and the stake is received and clamped between the chucks built into the elevating head. With the piles loaded in the lifting head, the lifting head is turned in the direction in which the piles are aligned, and then lowered.
As a result, the pile is pressed into the ground, and when the lifting head reaches its lower limit, the pile is released from the chuck, the lifting head is raised, the pile is clamped again, and the process is lowered.

In this way, one pile can be press-fitted to a predetermined depth, but if multiple piles are to be press-fitted at the same location, the piles to be continuously supplied are moved from the pile holding frame to the pile moving device. When the lower end of the pile attached to the head comes into contact with the upper end of the existing pile,
The abutting portions are connected by welding, bolting, caulking, or the like using splints or the like.
By repeatedly performing the above-described press-fitting operation on the combined piles, a desired pile structure such as a retaining wall can be constructed.

When pulling out piles, repeat the above procedure in reverse.
That is, the existing piles, which are press-fitted into the ground, are received in the lifting head and clamped by the chuck, and the head is raised. The elevating head can be raised until the attachment stake is just about to hit the upper obstacle. When the elevating head is raised to an appropriate height, the above-mentioned connecting portions of the piles are separated, and the piles are gripped by the pile moving device.

Next, the chuck on the lifting head is released and the lifting head is lowered. When the pile has completely come out of the lifting head, the pile moving device is driven to move the pile in parallel and accommodate it in the pile holding frame. These pile extraction operations are performed in a reverse process to the pile press-in operation described above, and by repeating the above operations, pile extraction can be performed continuously.

As is clear from the above-mentioned press-in and pull-out work, there is no need to use special equipment to suspend the piles in order to move them; Even if there is an upper obstacle, continuous anti-pressure insertion and extraction operations can be carried out efficiently.

(Embodiment) Figures 1 to 3 show an embodiment of the anti-pressure-fitting and extracting machine of the present invention, with Figure 1 being a side view and Figure 2 being a side view.
The figure is a plan view, and FIG. 3 is a front view.

In the figure, 1 is a saddle. This saddle 1 has clamps 2, 2 in its lower part for gripping existing piles P0, P0 that are press-fitted into the ground. A back-and-forth moving table 3a provided on the saddle 1 and movable in the front-rear direction (direction of the pile row), and a left-right moving table 3b movable in the left-right direction (orthogonal direction to the pile row) with respect to the back-and-forth moving table 3a and constitute the base 3. In this embodiment, the left-right moving table 3b is arranged on the front-rear moving table 3a, but of course the structure may be upside down, and the saddle 1
A rotating device capable of rotating around the entire circumference may be used between the base 3 and the base 3.

In the illustrated embodiment, the back-and-forth movable table 3a is attached to the saddle 1
The left and right movable table 3b is driven back and forth by a hydraulic plunger cylinder (not shown) provided between it and the front and rear movable table 3a.

Reference numeral 5 denotes an elevating head that is provided at the front of the left-right movable table 3a so as to be movable up and down. This elevating head 5 is provided with sliding bars 7, 7 that fit into sliding guide rods 6, 6 formed on the left-right moving table 3b, and are movable in the vertical direction orthogonal to the left-right moving table 3b. It's becoming possible. Further, the vertical movement of the elevating head 5 is performed by a pair of hydraulic plunger cylinders 8, 8 fixedly installed on the left and right moving table 3b.

The lower limit of the vertical movement stroke of the elevating head 5 by the plunger cylinder 8 is approximately the same height as the base 3, and the upper limit is not particularly limited.

Furthermore, the elevating head 5 incorporates a rotating cylinder 9 that can rotate around the entire circumference. This rotating cylinder 9 is provided with a chuck 10 for clamping a pile P.

A pile feeding mechanism consisting of a pile holding frame 11 and a pair of left and right pile moving devices 12 is provided on the upper part of the base 3.

The pile holding frame 11 holds a plurality of piles P in an upright manner. The first stake among multiple retaining stakes
It is preferable that the pushing piston member 13 provided at the rear of the holding stakes P is used to push the piles forward from behind the holding frame so that P1 is always located at the forefront of the pile holding frame 11.

The pile moving device 12 is provided on both sides of the pile holding frame 11, and has the function of holding the piles P one by one and moving them to the lifting head 5. This pile moving device 12 consists of horizontal drive pistons 14,14. In this embodiment, vertical drive pistons 15 and 1 are used to move each horizontal drive piston 14 up and down.
5 is provided, but it is not necessarily a necessary element. Each horizontal drive piston 14 is supported by a guide member 16 provided on the holding frame 11 and is only capable of vertical sliding.

In addition, each horizontal drive piston 14 is connected to a reciprocating rod 1.
4' has a clamping piston 17 that moves forward and backward in directions opposite to each other (inward direction), so that the stake P existing between the rods 14' and 14' can be clamped and held from both sides. There is. A pile holding member 18 is provided at the inner end of each clamping piston 17, but if it is necessary to enhance the pile holding effect of this holding member 18, an appropriate means such as a hydraulic cylinder is used for this holding member 18. It is sufficient to adopt a structure that provides a pile gripping function.

The operation of the anti-pressure-fitting puller with the above structure will be described below, but the saddle 1 and the base 3 have the same functions as the conventional anti-pressure-fitting puller and are not limiting elements in the present invention, so they will not be particularly mentioned.

Further, for ease of explanation, when press-fitting a pile, a state in which the entire apparatus is placed on an existing pile P0 as shown in FIG. 1 will be explained.

Horizontal drive pistons 14, 14 of the pile moving device 12 provided on the side of the holding frame 11 holding a large number of piles P
is positioned at the rear so that the pile holding members 18, 18 are in relation to the front row pile P1 in the pile holding frame 11. Therefore, the holding members 18, 18 are moved inward to grip the opposing pile P1 in the front row. On the other hand, the elevating head 5 is positioned at the lowest position and is placed at approximately the same height as the base 3.

Next, the horizontal drive pistons 14, 14 are driven, and the pile P
1 to above the lifting head 5. If there is a concern that the lower end of the stake P will come into contact with the upper surface of the base 3 during forward drive movement of the horizontal drive pistons 14, 14 and the forward movement will not be carried out smoothly, then the vertical drive pistons 15, 1
5 should be raised once and moved forward with the pile slightly lifted. Thereafter, when the rotating tube 9 is rotated in an appropriate direction to orient the gripping piles in the alignment direction, the pilanger cylinders 8, 8 are moved to raise the lifting head 5 and the pile P1 is moved into the lifting head 5 to the maximum extent possible. Accept it and clip it with chuck 10.

Next, the lifting head 5 is moved downward to perform anti-pressure fitting. When the piles are press-fitted as described above, it is natural that the piles must be connected to the piles that were previously press-fitted into the ground. In this case, the gripping pile P1 is brought into contact with the upper end of the pile, and pile joining work such as welding or bolting is performed using a joining plate or the like. The subsequent anti-press-fitting procedure can be accomplished by a known method that repeats the steps of hooking the pile P1, press-fitting, releasing, and raising the head, as described above.
By taking out a new pile from the pile holding frame 11 again using the above procedure, it is possible to bury a predetermined length of piles in the ground while adding a plurality of piles. Further, the extraction of the pile can be performed by the reverse procedure of the press-in of the pile, as described above.

(Effects) As is clear from the above, according to the present invention, there is provided a pile holding frame for holding a plurality of piles erected on a base, and a pile holding frame that holds each pile one by one from the pile holding frame. A pile moving device is installed to supply the lifting head to the lifting head, and the pile can be automatically moved between the lifting head and the pile holding frame when pressing in or pulling out the pile.This makes it possible to automatically move the pile between the lifting head and the pile holding frame. Loading and removal of piles from the lifting head can be carried out efficiently and continuously without using the lifting head, reducing working time and the number of working personnel, and dramatically increasing working efficiency.

In addition, since the above-mentioned auxiliary suspension device is not required, it can be effectively applied even if there are spatial restrictions above or around the pile driving site, and it can be used as a short joint at a pile driving site where it is difficult to use long piles. Particularly effective in increasing work efficiency when using piles.

Furthermore, a plurality of piles are held upright on the base and one
Since the piles are moved in parallel one by one, it is easy to load and store piles into the lifting head, and the height of the entire device can always be maintained at a constant level, making it possible to perform anti-pressure fitting or pulling out work by installing the device at the work location. You can always check the gender.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the anti-pressure-fitting/extracting machine, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. 1...Saddle, 2...Clamp, 3...Base,
5... Lifting head, 11... Pile holding frame, 12...
Pile moving device.

Claims (1)

[Claims] 1. A saddle having a clamp capable of gripping the upper end of an existing pile, a base mounted on the saddle so as to be movable back and forth, left and right, and a base mounted on the front part of the base so as to be movable up and down. A lifting head that can be lowered to a height approximately equal to the height of the pile and has a built-in chuck for gripping and fixing the piles, a pile holding frame that holds a plurality of piles loaded on the base in an upright manner, and both sides of the pile holding frame. 1. A pile press-in/extraction machine comprising: a pile moving device which is installed in a section of the pile and grips the loaded piles one by one at their side ends and moves them in parallel to a position above the lifting head.