JPH11350482A - Pile pressing in device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auger casing having the size just equal to the inside of a sheet pile by pinching the grip sections provided at both ends in the width direction of the sheet pile with pile chuck sections. SOLUTION: A chuck device 1 is provided with pile chuck sections 3 singularly gripping a sheet pile P and auger casing chuck sections 3 singularly gripping an auger casing K. The sheet pile P is a long U-shaped pile, and it is provided with nearly flat grip sections P1 at both end sections in the width direction. Two pairs of right and left pile chuck sections 2 are provided across the auger casing K, each of the pile chuck section 2 is constituted of a hydraulic cylinder device 4 provided below the chuck device 1 and a pile fixing pawl 5 at the position facing it, and the grip sections P1 of the sheet pile P are pinched and fixed by the cylinders 4a of the hydraulic cylinder devices 4 and the pile fixing pawls 5. The auger casing K having the size just equal to the recess P2 of the sheet pile P can be provided, and the sheet pile P can be driven into a larger excavation hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile press-in device for press-fitting a sheet pile into the ground.

[0002]

2. Description of the Related Art Conventionally, it is known that a sheet pile (sheet pile) is pressed into the ground and an earth auger is excavated along the same. This is because excavation of the earth auger facilitates press-fitting of the sheet pile. In addition, it is possible to press-fit the sheet pile, that is, to build the sheet pile by applying a static load by hydraulic pressure even on relatively hard ground, which is advantageous. The pile press-fitting device used for press-fitting the sheet pile as described above includes a chuck device for gripping the auger casing of the earth auger and the sheet pile, and lowers the chuck device and rotates the auger screw of the earth auger. By doing so, the sheet pile is pressed into the ground. Conventionally, there is also known a zero piler that drives a sheet pile close to an obstacle.

[0003]

In the case of very hard ground such as rock, for example, in order to reduce the resistance of the ground as much as possible, for example, as shown in FIG. It is desirable to increase the excavation amount by using an auger casing K having a size as large as possible for the concave portion P1. However, when the auger casing K is enlarged as shown in FIG. 6, when the sheet pile P is chucked by itself, the gap between the sheet pile P and the auger casing K becomes smaller, as shown in FIG. There is a problem that it is difficult to provide the pile fixing claw 40 for fixing the sheet pile P, and it is difficult to chuck and operate the sheet pile P alone.
Further, in the case of the zero piler, since it is difficult to press-fit the sheet pile into the ground simply by pressing it into the ground, the press-fitting may be performed by a jet method (for example, a water-jet method). In such a case, the ground on the obstacle side may be broken.

The present invention has been made in view of the above circumstances, and provides a pile press-in device capable of chucking a sheet pile by itself, regardless of the size of a casing, and press-fitting a zero pile even in hard ground. It is intended to be.

[0005]

In order to achieve the above object, the invention according to claim 1 is long in the longitudinal direction, and
A pile including a pile chuck portion for gripping a sheet pile having substantially flat grip portions at both ends in a width direction, and a press-fitting the sheet pile into the ground using excavation by an auger screw inserted inside an auger casing. In a press-fitting device, the pile chuck portion grips the grip portion of the sheet pile.

According to the first aspect of the present invention, chucking by the pile chuck portion of the pile press-in device is performed by sandwiching grip portions provided at both ends in the width direction of the sheet pile. Therefore, an auger casing having a size as large as the inside of the sheet pile can be provided as compared with a conventional case in which a claw portion for chuck is provided between the sheet pile and the auger casing to chuck the auger casing. In addition, the sheet pile can be driven into a larger excavation hole, so that the sheet pile can be easily pressed into the hard ground.

According to a second aspect of the present invention, in the pile press-fitting device of the first aspect, an auger casing chuck for gripping the auger casing, and a reciprocating means for independently reciprocating the auger casing chuck in the vertical direction. , Is provided.

According to the second aspect of the present invention, since the auger casing chuck is moved up and down independently by the reciprocating means, the sheet pile and the auger casing are gripped, and the sheet pile and the auger casing are press-fitted. On the way,
If there is a hard ground where it is difficult to press-fit the sheet pile, press-fitting of the sheet pile is stopped, then the auger casing is gripped by the auger casing chuck, and lowered by a predetermined amount while reciprocating up and down by the reciprocating means. The casing is press-fitted in advance of the sheet pile according to the excavation of the auger screw, and then the auger casing is raised by the reciprocating means, and then the sheet pile and the auger casing are press-fitted together. In this case, the sheet pile can be pressed into the ground already excavated by the auger screw, so that the sheet pile can be easily pressed into the hard ground where the sheet pile cannot be pressed. Also, by pressing the sheet pile simultaneously with raising the auger casing, it is possible to press-fit the sheet pile using the reaction force generated by raising the auger casing. Can be reduced.

According to a third aspect of the present invention, in the pile press-fitting device of the first or second aspect, the pile chuck portion and the auger casing chuck portion are located in one of right and left regions partitioned by the sheet pile. It is characterized by being provided.

According to the third aspect of the present invention, the pile chuck portion and the auger casing chuck portion are provided in one of the left and right regions partitioned by the sheet pile. When driving the sheet pile, the sheet pile is driven so that the area where the pile chuck section and the auger casing chuck section are not provided and the obstacle face each other, so that the sheet pile is pressed as close as possible to the obstacle. In addition, since the ground is excavated by the auger screw, the sheet pile can be easily pressed into the hard ground without damaging the obstacle unlike the conventional jet method.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pile press-in device according to the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a bottom view showing a chuck device as a main part of a pile press-in device according to a first embodiment of the present invention, and FIG. 2 is a front view of the same.

The pile press-in device 1a includes a chuck device 1, and the chuck device 1 is raised and lowered by a hydraulic cylinder device (not shown) provided in the pile press-in device 1a. In the chuck device 1, a pile chuck unit 2 for holding the sheet pile P alone is provided.
And an auger casing chuck 3 for holding the auger casing K alone. The sheet pile P
Is a long U-shaped pile, and has substantially flat gripping portions P1 at both ends in the width direction.

Two pairs of the pile chucks 2 are provided on the left and right sides of the auger casing K. The pile chuck portion 2 includes a hydraulic cylinder device 4 provided below the chuck device 1 and a pile fixing claw 5 provided at a position facing the hydraulic cylinder device 4.
The gripping portion P1 of the sheet pile P is clamped and fixed by a cylinder 4a of a hydraulic cylinder device 4 and a pile fixing claw 5. Accordingly, the auger casing K having a size as large as possible can be provided in the concave portion P2 of the sheet pile P, so that the excavation amount by the auger screw (not shown) can be increased, and the harder ground can be obtained. In this case, the press-fitting of the sheet pile P can be performed efficiently.

The auger casing chuck 3 is provided with guide rails 6 and 6 which are long in the axial direction of the auger casing K.
And a chuck main body 7 are provided, and ridges 7a, 7a protruding from an outer peripheral portion of the chuck main body 7 are slidably engaged with the guide rails 6, 6 vertically.
The chuck body 7 is provided to be slidable up and down.

The chuck device 1 is provided with a reciprocating means 8 for reciprocating the auger casing chuck portion 3 up and down. That is, the reciprocating means 8 is constituted by the hydraulic cylinder device 8, and the auger casing chuck portion 3 is reciprocated up and down by extending and contracting the piston rod 8b. The auger casing chuck portion 3 is provided with a pair of hydraulic cylinder devices 9 on the left and right and up and down, respectively. A pair of ridges K provided on the outer peripheral portion of the auger casing K and extending in the longitudinal direction.
1, K1 is engaged with engagement grooves 9b, 9b provided at the distal end of a piston 9a of the cylinder device 9, and the cylinder device 9 presses the auger casing K in the left-right direction. Can be grasped.

Next, a method of mounting the sheet pile P on the ground by mounting the chuck device 1 having the above structure on the pile press-in device 1a will be described. First, FIGS. 1 and 2
As shown in FIG. 5, the sheet pile P is inserted into the chuck device 1, the auger casing K is inserted into the auger casing chuck portion 3, and is gripped by the hydraulic cylinder device 9 of the auger casing chuck portion 3.
The sheet pile P is gripped by the pile chuck 2. Next, the sheet pile P is pressed into the ground together with the auger casing K by lowering the chuck device 1 by a hydraulic cylinder device (not shown). When the sheet pile P and the auger casing K are being press-fitted, if there is a hard ground in which the sheet pile P is difficult to press-fit, the press-down of the sheet pile P is stopped by temporarily stopping the lowering of the chuck device 1. And then
The auger casing K is pressed into the sheet pile P before the auger casing K is moved forward and backward by the hydraulic cylinder device 8 and lowered by a predetermined amount in accordance with excavation of an auger screw (not shown).

Next, after the auger casing K is raised by the hydraulic cylinder device 8, the sheet pile P and the auger casing K are press-fitted together. In this case, the sheet pile P is an auger screw (not shown).
Accordingly, the sheet pile P can be press-fitted into the already excavated ground, and the sheet pile P can be easily press-fitted even on a hard ground where sheet pile press-fitting is difficult. When press-fitting the auger casing K,
The auger screw in the auger casing K is rotated to excavate the ground at its tip, and the earth and sand is discharged through the auger casing K from a discharge port (not shown).

When the sheet pile P and the auger casing K are press-fitted by one pitch by lowering the chuck device 1 by one stroke, the pile chuck portion 2 is pressed.
And the auger casing chuck 3 are released from their grips to separate them from the sheet pile P and the auger casing K. Then, the chuck device 1 is raised by the stroke, and the sheet pile P and the auger casing are again moved at that position. K, and the process of lowering the chuck device 1 to press-fit the sheet pile P and the auger casing K is repeated a predetermined number of times.
And the auger casing K.

When the sheet pile P is pressed into the predetermined depth, the gripping of the auger casing K by the auger casing chuck 3 is maintained while the gripping of the sheet pile P by the pile chuck 2 is released. Then, the auger casing K is pulled out by one pitch by raising the chuck device 1 by one stroke, and thereafter, the chuck device 1 is repeatedly moved up and down. Grab the auger casing K with
When descending, the auger casing K is pulled out one pitch at a time by releasing the auger casing K.

Further, in the chuck device 1 of this embodiment, when the auger casing K is pulled up by raising the auger casing chuck portion 3 by the hydraulic cylinder device 8, the auger casing K is moved downward by the peripheral surface resistance. An oncoming reaction force acts. Then, this reaction force is transmitted to the chuck device 1 via the auger casing chuck portion 3 and acts to push the chuck device 1 downward. On the other hand, when the chuck device 1 gripping the sheet pile P is lowered at the same time as the auger casing K is pulled up or after a certain period of time, the reaction force is added to the pressure input to the chuck device 1. The applied force acts. Therefore, the press input required to press-fit the sheet pile P can be reduced by the amount of the reaction force.

The pile press-in device 1 is not limited to the above-described one in which the auger casing chuck portion 3 reciprocates up and down independently. For example, the pile press-in device having the structure shown in FIGS. Applicable. That is, the pile press-fitting device 10 shown in FIGS.
A chuck device 11 having a pile chuck portion 12 for gripping the auger casing K and an auger casing chuck portion 13 for gripping the auger casing K is provided. The auger casing chuck portion 13 such as the pile press-in device 1a is vertically reciprocated. No reciprocating means is provided. Therefore, in the pile press-fitting device 10 of this configuration, the sheet pile P and the auger casing K can be press-fitted into the ground by moving the chuck device 11 up and down. Also in this case, since the pile chuck portion 12 is configured to hold the grip portion P1 provided at the end in the width direction of the sheet pile P,
An auger casing K of a full size can be provided in the concave portion P2 of the sheet pile P.

[Second Embodiment] FIG. 5 is a bottom view showing a pile press-in device according to a second embodiment of the present invention. A pile press-in device 30 according to the second embodiment shown in FIG.
Are the pile press-fitting devices 1a, 10a of the first embodiment.
And a chuck device 3 having a pile chuck portion 32 for gripping the sheet pile P and an auger casing chuck portion 33 for gripping the auger casing K.
1 is provided.

Two pairs of the pile chucks 32 are provided on the left and right sides of the auger casing K. Further, the pile chuck unit 32 includes the chuck device 3.
1 and a pile fixing claw 35 provided at a position facing the hydraulic cylinder device 34, and the gripping portion P1 of the sheet pile P is connected to the hydraulic cylinder device. 34 cylinders 34
a and a pile fixing claw 35 to hold and fix.

The auger casing chuck portion 33 includes:
Guide rail 3 long in the axial direction of the auger casing K
6 and 36, and a chuck body 37 are provided, and ridges 37a projecting from the outer periphery of the chuck body 7 are provided.
The chuck body 37 is slidable up and down by slidably engaging the guide rails 37a up and down with the guide rails 36 and 36. A hydraulic cylinder device 38 is provided in the chuck device 31 as a reciprocating means 38 for reciprocating the auger casing chuck portion 33 up and down, and by extending and retracting a piston rod (not shown) of the auger casing chuck portion 33. 33 is reciprocated up and down.

The auger casing chuck 3
3 is provided with a pair of hydraulic cylinder devices 39. A pair of longitudinally extending ridges K1, K1 provided on the outer peripheral portion of the auger casing K engage with engaging grooves 39b provided at the distal end of the piston rod 39a of the hydraulic cylinder device 39. Then, the auger casing K can be grasped by applying pressure in the left-right direction by the cylinder devices 39. The pile chuck section 32 includes the pile press-in devices 1a, 1a of the first embodiment.
0, the hydraulic cylinder device 34 is different from the auger casing chuck portion 33 side,
That is, the sheet pile P is provided on the concave portion P2 side. Further, the tip of the outer peripheral portion of the main body 30a of the pile press-in device 30 is located inside the tip of the sheet pile P on the obstacle S side. Therefore, as shown in FIG. 5, the sheet pile P can be pressed in close to the obstacle S.

The pile press-fitting device 30 can excavate the ground with an auger screw (not shown) inserted into the auger casing K and press-fit the sheet pile P into the ground. Efficient work can be performed. The operation of press-fitting the sheet pile P of the pile press-fitting device 30 is the same as that of the press-fitting devices 1a and 10 of the first embodiment.

[0027]

According to the first aspect of the present invention, chucking by the pile chuck portion of the pile press-in device is performed by sandwiching grip portions provided at both ends in the width direction of the sheet pile. Therefore, an auger casing having a size as large as the inside of the sheet pile can be provided as compared with a conventional case in which a claw portion for chuck is provided between the sheet pile and the auger casing to chuck the auger casing. In addition, the sheet pile can be driven into a larger excavation hole, so that the sheet pile can be easily pressed into the hard ground.

According to the second aspect of the present invention, since the auger casing chuck is moved up and down independently by the reciprocating means, the sheet pile and the auger casing are gripped, and the sheet pile and the auger casing are press-fitted. On the way,
If there is a hard ground where it is difficult to press-fit the sheet pile, press-fitting of the sheet pile is stopped, then the auger casing is gripped by the auger casing chuck, and lowered by a predetermined amount while reciprocating up and down by the reciprocating means. The casing is press-fitted in advance of the sheet pile according to the excavation of the auger screw, and then the auger casing is raised by the reciprocating means, and then the sheet pile and the auger casing are press-fitted together. In this case, the sheet pile can be pressed into the ground already excavated by the auger screw, so that the sheet pile can be easily pressed into the hard ground where the sheet pile cannot be pressed. Also, by pressing the sheet pile simultaneously with raising the auger casing, it is possible to press-fit the sheet pile using the reaction force generated by raising the auger casing. Can be reduced.

According to the third aspect of the present invention, the pile chuck portion and the auger casing chuck portion are provided in one of the left and right regions separated by the sheet pile. When driving the sheet pile, the sheet pile is driven so that the area where the pile chuck section and the auger casing chuck section are not provided and the obstacle face each other, so that the sheet pile is pressed as close as possible to the obstacle. In addition, since the ground is excavated by the auger screw, the sheet pile can be easily pressed into the hard ground without damaging the obstacle unlike the conventional jet method.

[Brief description of the drawings]

FIG. 1 is a bottom view showing a chuck device as a main part of a pile press-fitting device according to a first embodiment of the present invention.

FIG. 2 is a front view of the chuck device of FIG.

FIG. 3 is a bottom view of a chuck device different from FIG. 1;

FIG. 4 is a front view of the chuck device of FIG. 3;

FIG. 5 is a bottom view showing a pile press-fitting device according to a second embodiment of the present invention.

FIG. 6 is a diagram schematically showing a positional relationship between a sheet pile and an auger casing.

FIG. 7 is a diagram schematically showing a positional relationship of a conventional pile fixing claw.

[Explanation of symbols]

 P Sheet pile P1 Gripping portion K Auger casing 1, 11, 31 Chuck device 1a, 10, 30 Pile press-in device 2, 12, 32 Pile chuck portion 3, 13, 33 Auger casing chuck portion 5, 35 Pile fixing claw 8, 28 Cylinder device

Claims (3)

[Claims] 1. Excavation by an auger screw inserted in an auger casing, comprising a pile chuck portion for gripping a sheet pile which is long in a longitudinal direction and has substantially flat grip portions at both ends in a width direction. A pile press-fitting device for press-fitting the sheet pile into the ground by using a pile chuck, wherein the pile chuck portion grips the grip portion of the sheet pile. 2. The pile press-fit according to claim 1, further comprising: an auger casing chuck for gripping the auger casing; and reciprocating means for independently reciprocating the auger casing chuck in the vertical direction. apparatus. 3. The pile press-fit according to claim 1, wherein the pile chuck and the auger casing chuck are provided in one of right and left regions partitioned by the sheet pile. apparatus.