JP2013163928A - Pile press-in machine and pile press-in method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable press-in of a pile to be performed downward further, and to enable a longer pile to be pressed-in even if an upper space above a pile press-in machine is limited, thereby decreasing the number of connected piles, shortening construction period, and reducing construction cost.SOLUTION: A pile press-in machine 10 comprises: a guide rail 12 reciprocating in a press-in direction with respect to a clamp device 101; and a pile chuck device 13 for gripping a pile. The pile chuck device 13 is added to the guide rail 12 to be fixable at different positions in the press-in direction and movable with respect to the guide rail 12 in the press-in direction by releasing its fixing state. The guide rail 12 is provided so as to extend below the clamp device 101. The pile 203L is pressed into the ground by lowering the pile chuck device 13 in the state in which it is fixed to the guide rail 12, the pile chuck device is lifted in the state in which it is movable with respect to the guide rail 12, and the pile chuck device is moved downward with respect to the guide rail 12, and this process is repeated.

Description

  The present invention relates to a pile press-in machine and a pile press-in method for press-fitting a pile into the ground.

2. Description of the Related Art Conventionally, a pile press-in machine that takes a reaction force from an existing pile and press-fits the pile into the ground is known as an apparatus for driving a pile into the ground and burying it (see, for example, Patent Documents 1-3).
This pile press-in machine is provided at the lower part of the main body of the device, a clamping device that grips the existing pile, and the pile that is provided at the front end of the main body of the device and press-fitted into a position adjacent to the existing pile. A chuck device.
Then, the clamp presser is installed on the existing pile by gripping the upper end of the existing pile, and the chuck device for holding the pile is lowered while the reaction force is removed from the existing pile. Therefore, the pile press-in machine places the piles on the existing piles and presses them into the ground. Next, the newly embedded existing pile is grasped by the clamp device, and the pile press-fitting machine is moved and installed on the new existing pile.
By repeating the press-fitting of such piles and the movement of the pile press-in machine, it is possible to bury a plurality of piles continuously and form a pile row in which a plurality of piles are arranged.

JP 2004-11337 A Japanese Patent Laid-Open No. 10-195872 JP-A-11-350482

However, as shown in FIG. 4, it may be necessary to install and apply a pile presser in a space where the upward direction is restricted.
For example, consider a case where a conventional pile press-in machine 100 is installed in a space between the water surface 200 and the sky obstacle 201 as shown in FIG. The pile press-in machine 100 includes a clamp device 101 that holds an existing reaction force pile 202, a press-fit chuck device 102 that holds a pile 203 </ b> S that is press-fitted into a position adjacent to the existing reaction force pile 202, and upper and lower of the press-fit chuck device 102. And a chuck guide rail 103 for guiding the movement. FIG. 4 shows a state where the press-fitting chuck device 102 has been lowered to the lower limit and the upper end of the pile 203S gripped by the press-fitting chuck device 102 has been lowered to the press-fitting limit position 104. The pile 203S gripped by the press-fitting chuck device 102 cannot be pushed down below the press-fitting limit position 104 at its upper end. To push it down further, it is necessary to perform press-fitting work by adding another pile 203S. At this time, because the upper space 105 of the pile presser 100 is narrow, the pile length of one pile 203S that can be press-fitted by the pile presser 100 is limited to a short length, and the number of joints of the pile 203S is as shown by the pile joint 204. There is a problem that it is not efficient because it increases or the press-fitting stroke of the pile press-in machine 100 is limited. Pile joints require welding or bolting, and therefore require a great deal of time and labor. In addition, pile joint work in a space where the sky is limited is inefficient and dangerous. Reduction of the number of joints is desired. In FIG. 4, 106 is a saddle, 107 is a slide base, 108 is a revolving frame, and 109 is a hydraulic cylinder device.
Patent Documents 2 and 3 describe a pile press-fitting device including a chuck device for gripping a sheet pile and a chuck device for gripping an auger casing. The lower limit position of the chuck device is shown in FIG. As shown, the piles gripped by the chuck device cannot be driven deeper.

  The present invention has been made in view of the above-described problems in the prior art, and enables the pile to be pressed downward when the pile is press-fitted into the ground by the pile press-in machine, and above the pile press-in machine. Even if the space is limited, it is possible to press-fit longer piles, thereby reducing the number of joints of the piles, and shortening the work period and cost.

The invention according to claim 1 for solving the above-mentioned problem is to take a reaction force from the existing pile by a clamping device that holds and supports the upper end portion of the existing pile press-fitted into the ground, and holds the pile. A pile press-in machine that presses a pile into a position adjacent to the existing pile by lowering,
A guide rail that reciprocates in the press-fitting direction with respect to the clamping device;
It can be fixed at different positions in the press-fitting direction with respect to the guide rail, is released from the fixing, is guided by the guide rail, and is attached to the guide rail so as to be movable in the press-fitting direction with respect to the guide rail. A pile press-in machine comprising a pile chuck device for gripping.

  The invention according to claim 2 is the pile press-fitting machine according to claim 1, further comprising a rail chuck device that grips the guide rail and reciprocates in the press-fitting direction with respect to the clamp device.

  Invention of Claim 3 is a pile press-fit machine of Claim 1 or Claim 2 with which the said guide rail is extended below the said clamp apparatus.

Invention of Claim 4 is the pile press-in method which press-fits a pile into the ground using the pile press-in machine as described in any one of Claims 1-3,
In a state where the pile chuck device for gripping the pile is fixed to the guide rail, the step of pressing the pile into the ground by lowering the guide rail;
The pile chuck device that grips the pile press-fitted into the ground is moved with respect to the guide rail, the guide rail lowered by the process is raised, and the pile chuck device is moved relative to the guide rail. The pile press-in method is characterized by executing the step of moving downward as one stroke of press-fit.

  The invention according to claim 5 is the method according to claim 4, wherein the pile held by the pile chuck device is press-fitted until the upper end of the pile is lowered from the lower end of the clamp device by repeatedly performing one stroke of the press-fitting. It is a pile press-in method.

According to the present invention, by lowering the guide rail, the pile fixed to the guide rail can be press-fitted through the pile chuck device, and when the guide rail is raised, the pile chuck device is released from being fixed to the guide rail. It is possible to move the pile chuck device and the pile held by this downward with respect to the guide rail, and further repeat the press-fitting by lowering the guide rail. it can.
Therefore, according to the present invention, it is possible to press-fit the pile gripped by the pile chuck device downward, for example, downward from the clamp device.
Also, even if the upper space of the pile presser is restricted, long guide rails and long piles are used underneath the pile presser, such as between the water surface below the pile presser and the ground below the surface. It can be installed, and by sending piles to the lower area using guide rails, longer piles can be press-fitted sequentially, thereby reducing the number of pile joints and shortening the work period and cost. .
In addition, by changing the length of the guide rail according to the construction space on site, it is possible to cope with construction on various sites. By changing the length of the guide rail as long as it can be constructed, the depth at which the pile can be lowered and the maximum length of the pile that can be press-fitted can be changed.

1 is a side view showing a construction scene by a pile press-in machine, and (b) is a top view of a pile chuck portion according to an embodiment of the present invention. In addition, a single pile is also indicated. It is a process scene figure which shows the flow of construction by the pile press-fitting machine which concerns on one Embodiment of this invention. It concerns on other one Embodiment of this invention in the case of press-fitting a steel pipe pile, (a) is a side view which shows the construction scenery by a pile press-fit machine, (b) is a pile chuck part top view. It is a side view which shows the construction scenery by the pile press-fitting machine which concerns on a prior art example. In addition, a single pile is also indicated.

  An embodiment of the present invention will be described below with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

First, the configuration and function of the pile press-in machine will be described with reference to FIG.
As shown in FIG. 1, the pile presser 10 according to the present embodiment includes a clamp device 101, a chuck guide rail 103, a saddle 106, a slide base 107, as in the conventional pile presser 100 (see FIG. 4). The revolving frame 108 and the hydraulic cylinder device 109 are provided. Unlike the conventional pile press-in machine 100, the pile press-in machine 10 of the present embodiment includes a rail chuck device 11, a pile chuck guide rail 12, and a pile chuck device 13.
The chuck guide rail 103 and the rail chuck device 11 are supported at the tip of the revolving frame 108 so as to reciprocate by the hydraulic cylinder device 109. The chuck guide rail 103 and the rail chuck device 11 are fixed integrally. The chuck guide rail 103 is engaged with the revolving frame 108 to guide this reciprocation.

The pile chuck guide rail 12 is held by the rail chuck device 11. As the rail chuck device 11, a device having a gripping mechanism capable of gripping the pile chuck guide rail 12 is applied. If the rail chuck device 11 is used, it is easy to attach and remove the pile chuck guide rail 12 and replace the pile chuck guide rail 12 with a different one. Or you may fix the pile chuck | zipper guide rail 12 with fasteners, such as a volt | bolt and a nut.
In any case, the pile chuck guide rail 12 reciprocates in the press-fitting direction with respect to the clamp device 101 by the press-fitting operation of the pile press-fitting machine 10 (the output of the hydraulic cylinder device 109).

The pile chuck device 13 has a gripping mechanism for gripping a pile (sheet pile) 203L. The pile chuck device 13 is attached to the pile chuck guide rail 12. The pile chuck device 13 can be fixed to the pile chuck guide rail 12 at different positions in the press-fitting direction and can be released from the fixed state. When the fixation is released, the pile chuck device 13 is guided by the pile chuck guide rail 12 and can move in the press-fitting direction with respect to the pile chuck guide rail 12.
Accordingly, when the pile chuck device 13 is fixed to the pile chuck guide rail 12, the pile chuck device 13 moves up and down integrally with the pile chuck guide rail 12, and when the fixation is released, The position can be changed.
In the present embodiment, as indicated by a two-dot chain line in FIG. 1 (a), the pile chuck device 13 is movable from the upper end portion to the lower end portion of the pile chuck guide rail 12, and an arbitrary position within the movement range. Thus, the pile chuck device 13 can be fixed to the pile chuck guide rail 12.
The longitudinal direction of the pile chuck guide rail 12 is the guide direction of the pile chuck device 13 by the pile chuck guide rail 12, and the guide direction and the press-fitting direction are the same direction. The press-fitting direction is the vertical direction, but it may be constructed obliquely.

In the press-fitting stroke operation of the pile press-fitting machine 10, the pile chuck guide rail 12 is provided with a maximum length from the upper end position where the upper end does not contact the upper obstacle 201 to the lower end position where the lower end does not contact the lower ground 205.
In this embodiment, the pile chuck guide rail 12 is extended below the clamp device 101, and the upper end of the pile 203 </ b> L gripped by the pile chuck device 13 is deeper than the upper end of the reaction force pile 202, Can be fed deeper than the lower end of the clamping device 101.

  Next, a pile press-in method for press-fitting the pile 203L into the ground using the above pile press-in machine 10 will be described with reference to FIG. FIG. 2 shows the same pile presser 10 as in FIG. 1 and the same construction space as in FIG. However, illustration of the water surface is omitted. In FIG. 1 and FIG. 2, the rail chuck device 11, the pile chuck guide rail 12, the pile chuck device 13, and the pile 203 </ b> L are drawn by 90 degrees for the sake of simplicity of illustration. When a pile row is formed by connecting the piles 203L, it differs by 90 degrees from the illustrated case.

In the following steps, the pile chuck guide rail 12 is always fixed to the rail chuck device 11.
(Descent process)
The lowering process is carried out in one stroke of press-fitting.
First, as shown in FIG. 2A, the pile 203 </ b> L is gripped by the pile chuck device 13.
Next, with the pile chuck device 13 fixed to the pile chuck guide rail 12, the hydraulic cylinder device 109 is operated to lower the pile chuck guide rail 12 (FIG. 2 (a) → (b)). At this time, the chuck guide rail 103, the rail chuck device 11, the pile chuck guide rail 12, the pile chuck device 13, and the pile 203L are lowered integrally, and the pile 203L is press-fitted into the lower ground 205 by one stroke (FIG. 2 ( b)).

(Unfixing process)
Next, the fixing of the pile chuck device 13 to the pile chuck guide rail 12 is released (FIG. 2 (c)). As a result, the pile chuck device 13 is movable with respect to the pile chuck guide rail 12.

(Rising process)
Next, an ascending process is performed. That is, the hydraulic cylinder device 109 is operated to raise the pile chuck guide rail 12 lowered in the lowering step (FIG. 2 (c) → (d)). At this time, the pile chuck device 13 is movable with respect to the pile chuck guide rail 12 by the above-described fixing release process, the lower end of the pile 203L is press-fitted into the lower ground 205, and the upper end of the pile 203L is attached to the pile chuck. Since the device 13 is gripping, the pile chuck device 13 cannot move with respect to the lower ground 205 but moves downward with respect to the pile chuck guide rail 12. Further, the chuck guide rail 103, the rail chuck device 11, and the pile chuck guide rail 12 are raised together, and the pile chuck device 13 and the pile 203 </ b> L do not move with respect to the lower ground 205.

(Fixing process)
When the lifting of the pile chuck guide rail 12 is completed by the lifting step, the pile chuck device 13 is fixed to the pile chuck guide rail 12.

The above steps (FIG. 2 (a) → (d)) are repeatedly executed as many times as necessary for one press-fitting stroke.
FIG. 2 (e) shows the situation where the first stroke has been completed. By executing the second stroke, the pile 203L is press-fitted into the lower ground 205 by two strokes as shown in FIG.

Further, by repeatedly executing the press-fitting stroke, as shown in FIG. 2 (g), the pile chuck device 13 and the pile 203L are gradually lowered, and the pile 203L is driven deeply into the lower ground 205, and the pile chuck guide The pile chuck device 13 is lowered to the lower end of the rail 12. The upper end of the pile 203 </ b> L is fed below the upper end of the reaction force pile 202 and further below the lower end of the clamp device 101. The pile can be driven down more deeply depending on the length of the pile chuck guide rail 12 extending downward.
Finally, the pile 203L is released from the pile chuck device 13.
This completes the construction of one pile 203L. The next pile 203L is added and constructed in the same manner.

As can be seen from the above description, according to the method of the present embodiment, the long pile 203L can be press-fitted.
As shown in FIG. 4, in the conventional method, the upper end of the pile 203S gripped by the press-fitting chuck device 102 is lowered only to the press-fitting limit position 104, so that the length of the pile 203S to be gripped next by the press-fitting chuck device 102 is increased. The length is limited by the distance between the press-fitting limit position 104 and the upper obstacle 201 and the press-fitting stroke length.
On the other hand, according to the method of this embodiment, the upper end of the pile 203L gripped by the pile chuck device 13 is lowered below the conventional press-fit limit position 104 and further below the lower end of the clamp device 101. Therefore, the length of the pile 203L to be gripped next by the pile chuck device 13 can be increased as compared with the conventional construction method.
As a result, the long pile 203L can be applied, the pile joint portion 204 can be reduced to improve efficiency, and the construction period can be shortened and the construction cost can be reduced.

  In addition, the pile to press-fit is not limited to a sheet pile. It can be implemented by changing the pile chuck device according to the applied pile form. As a reference, Fig. 3 shows a diagram when a steel pipe pile is press-fitted. As shown in FIG. 3, in the pile press-in machine 20, a pile chuck device 23 having a gripping mechanism for gripping the steel pipe pile 303 is applied in order to press-fit the steel pipe pile 303.

DESCRIPTION OF SYMBOLS 10 Pile press machine 11 Rail chuck apparatus 12 Pile chuck guide rail 13 Pile chuck apparatus 20 Pile press machine 23 Pile chuck apparatus 100 Pile press machine (conventional example)
101 Clamping device 102 Press-fitting chuck device 103 Chuck guide rail 104 Press-fitting limit position 105 Upper space 106 Saddle 107 Slide base 108 Swivel frame 109 Hydraulic cylinder device 200 Water surface 201 Obstacle over air 202 Reaction force pile 203L Pile 203S Pile 204 Pile joint 205 Lower part Ground 303 Steel pipe pile

Claims (5)

A clamping device that holds and supports the upper end of an existing pile that has been press-fitted into the ground takes a reaction force from the existing pile, and presses the pile into a position adjacent to the existing pile by grasping and lowering the pile. A pile press-in machine,
A guide rail that reciprocates in the press-fitting direction with respect to the clamping device;
It can be fixed at different positions in the press-fitting direction with respect to the guide rail, is released from the fixing, is guided by the guide rail, and is attached to the guide rail so as to be movable in the press-fitting direction with respect to the guide rail. A pile press-in machine comprising: a pile chuck device for gripping.   The pile press-fit machine according to claim 1, further comprising a rail chuck device that grips the guide rail and reciprocates in the press-fit direction with respect to the clamp device.   The pile press-fitting machine according to claim 1 or 2, wherein the guide rail extends below the clamp device. A pile press-in method for press-fitting a pile into the ground using the pile press-in machine according to any one of claims 1 to 3,
In a state where the pile chuck device for gripping the pile is fixed to the guide rail, the step of pressing the pile into the ground by lowering the guide rail;
The pile chuck device that grips the pile press-fitted into the ground is moved with respect to the guide rail, the guide rail lowered by the process is raised, and the pile chuck device is moved relative to the guide rail. And a step of moving downward as a stroke of press-fitting.   The pile press-fitting method according to claim 4, wherein the pile gripped by the pile chuck device is press-fitted until the upper end of the pile is lowered from the lower end of the clamp device by repeatedly executing one stroke of the press-fitting.

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