JP3163062B2 - Pile press-in device - Google Patents

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 piles together with excavation using an earth auger so that piles such as sheet piles can be press-fitted even in hard ground.

[0002]

2. Description of the Related Art In general, there is known a pile press-in device 1 as shown in FIG. 8 in which a new pile is pressed into the ground by taking a reaction force from an existing pile. In the pile press-in device 1, the already driven pile (U-shaped sheet pile 2 ...) is gripped by the clamps 3 ... and is taken by the chuck 4 while taking a reaction force from the existing steel sheet piles 2 .... The steel sheet pile 2 is pressed into the ground by lowering the chuck 4. Further, in the pile press-in device 1 shown in FIG. 8, the earth auger 5 with a casing is used so that the steel sheet pile 2 can be press-fitted even in hard ground where it is difficult to press-fit the steel sheet pile 2 only by hydraulic pressure. The steel sheet pile 2 can be press-fitted while digging.

[0003]

In the above-mentioned pile press-in device, when a plurality of steel sheet piles are continuously press-fitted, excavation is performed with an earth auger, which is pulled out from the ground to perform the next excavation. You will repeat what you do.
However, the pile press-in device can raise and lower the earth auger in a short span, for example, by vertical movement of a chuck or the like, but cannot completely pull out the earth auger from the ground. Therefore, when press-fitting one steel sheet pile after press-fitting the next steel sheet pile, it was necessary to pull out the earth auger from the ground using a crane or the like.

[0004] When a sheet pile wall is constructed by continuously pressing a U-shaped steel sheet pile into the ground, a U-shaped sheet pile is generally used.
The projecting side of the steel sheet pile of the mold is alternately turned left and right one by one so that the sheet pile wall is made wavy in plan view, and in the pile press-in device, by rotating the chuck left and right, The direction of the steel sheet pile can be changed left and right one by one. Therefore, when press-fitting one steel sheet pile and then press-fitting the next steel sheet pile, the chuck is rotated by 180 degrees to the left or right.
If the earth auger is attached to the chuck, the earth auger will also rotate. That is, the casing of the earth auger is provided with an engaging member that engages with the chuck to prevent the casing from rotating so that the casing does not rotate during excavation. When the chuck is rotated in this state, the casing (earth auger) also rotates.

However, the earth auger is provided with a discharge tube for discharging the earth, a hydraulic pipe to a hydraulic motor for rotating the earth auger, and the like. There is a possibility that problems such as the discharge tube hitting the surrounding structure or the hydraulic piping being pulled. Therefore, in order to prevent the casing from rotating integrally with the chuck, at least the casing is lifted by a crane or the like until the engaging member of the casing does not engage with the chuck.
In this state, it was necessary to rotate the chuck. Also,
Since the casing is lifted and the casing engaging member is removed from the chuck, it is necessary to adjust the casing engaging member to engage with the chuck when lowering the casing in order to perform excavation again. Was. From the above, complicated work is required and time is required after press-fitting one steel sheet pile to press-fitting the next steel sheet pile.

The present invention has been made in view of the above circumstances, and is a pile press-in device capable of reducing the work from press-fitting one steel sheet pile to press-fitting the next steel sheet pile and shortening the work time. The purpose is to provide.

[0007]

According to a first aspect of the present invention, there is provided a pile press-in device for press-fitting a pile into a ground by excavating a portion where the pile is to be press-fitted by an earth auger with a casing. A chuck for gripping the pile, a pile elevating means for allowing the pile to be pressed in by elevating and lowering the chuck, a casing chuck for gripping the casing of the earth auger, and elevating and lowering the casing chuck. And an earth auger elevating means for raising and lowering the earth auger along with an auxiliary casing chuck for gripping the casing separately from the casing chuck. According to the above configuration,
While the casing is supported by the auxiliary casing chuck that grasps the casing separately from the casing chuck, the earth auger with the casing can be sequentially raised by lifting and lowering the casing chuck. Therefore,
The earth auger can be pulled out of the ground without using a crane.

According to a second aspect of the present invention, when a pile is pressed into a ground, a portion to be pressed into the pile is excavated by an earth auger with a casing, and the pile is pressed into the ground. And a chuck rotatable so as to rotate the pile around an axis, and a pile elevating means capable of press-fitting the pile by raising and lowering the chuck, wherein the earth auger is attached to the chuck. A casing chuck for gripping the casing, and an earth auger elevating means for elevating and lowering the earth auger along the pile by elevating and lowering the casing chuck. An engaging member which is suppressed by engaging with the chuck is arranged along the axial direction of the casing except for a portion at a predetermined height position of the casing. And it is provided Te. According to the above configuration, a pile (for example, a steel sheet pile) is continuously press-fitted, and in order to construct a wavy sheet pile wall in a plan view, one steel sheet pile is press-fitted, and then the next steel sheet pile is inserted. When press-fitting, when rotating the chuck to change the direction of the steel sheet pile, the position of the chuck with respect to the casing is set to the predetermined height position, and the auger with the casing is supported by the ground. When the chuck is rotated, the casing does not rotate even when the chuck is rotated because the engaging member of the casing is not at a position where the chuck engages with the chuck. Therefore, only the chuck can be rotated without rotating the casing without lifting the casing with a crane.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a pile press-in device according to an embodiment of the present invention will be described with reference to the drawings. 1 to 3
FIG. 4 shows a pile press-in device 10 of this example, and FIG.
FIG. 7 to FIG. 7 show the chuck 20 of the pile press-fitting device 10. As shown in FIG. 1 to FIG.
Is an existing U-shaped sheet pile 2 similar to a conventional pile press-in device.
A saddle 12 having a clamp 11 at a lower portion for gripping the
A slide base 13 that slides back and forth with respect to the saddle 12, a turning part 14 that turns on the slide base 13, a hydraulic cylinder 15 in front of the turning part 14,
A chuck 20 that can be moved up and down by 15 and grips the steel sheet pile 2, and an earth auger 17 with a casing for excavation
And a reel 19 on which a hose (not shown) for supplying hydraulic pressure to a hydraulic motor 18 of the earth auger 17 is wound up.

[0010] As shown in FIG.
Is provided with a cylindrical casing 16,
A screw rod (not shown) having a bit at the tip and having a screw spirally provided vertically along the outer periphery is provided in the casing 16 by the hydraulic motor 18.
And rotatably provided. Also, the casing 1
6 is provided with a discharging section 16 for discharging excavated earth and sand.
a, and a discharging pipe (not shown) is connected to the discharging section 16a. Also, the casing 16
As shown in FIGS. 1 and 6, for example, a ridge 16b is formed on the surface of the upper and lower surfaces. The ridge 16b is engaged with a casing chuck 23 of the chuck 20, which will be described later, to prevent the casing 16 from rotating. Further, the ridge 16b is provided at a portion other than the upper end portion as a predetermined height position of the casing 16, and as shown in FIG. A projection 16b is formed to extend downward from a portion of the casing 16 below the chuck 20. Therefore, when the casing 16 is lowered with respect to the chuck 20 as described above, the casing 16 can rotate with respect to the chuck 20, that is, the chuck 20 can rotate with respect to the casing 16. The number of the ridges 16b may be one or more.

[0011] The chuck 20 is connected to the rotating portion 14.
4 and the like are vertically movably fitted via an annular support portion 21 shown in FIG.
Are attached to the hydraulic cylinders 15 and 15 through which they are driven up and down to ascend and descend. The chuck 20 is rotatable left and right along the inner periphery of the annular support portion 21 about the center axis of the casing 16 held by the chuck 20 as described later. As shown in FIG. 4 showing the cross section of the chuck 20 and FIG. 7 showing the bottom surface of the chuck 20, a pile chuck portion 22 for gripping the steel sheet pile 2 is provided on the right side in the figure below the chuck 20. The pile chuck portion 22 includes a fixed holding portion 22a fixedly provided in the chuck 20 and a fixed holding portion 22a.
a hydraulic cylinder 22b that is arranged to face the fixed holding portion 22a and is extendable toward the fixed holding portion 22a.
a and the hydraulic cylinder 22b sandwich the steel sheet pile 2 (in FIG. 4, the left and right side edges of the steel sheet pile 2 are removed and only the central part is shown). Therefore, the pile chuck portion 22
Is to grip the steel sheet pile 2, and the hydraulic cylinders 15, 15 for lifting and lowering the chuck 20 serve as pile lifting means.

FIG. 4 shows the chuck 2 partially broken away.
As shown in FIG. 5 showing the left side of FIG. 5 and FIG. 6 showing a plane in which a part of the chuck 20 is broken, a casing chuck 23 for holding the casing 16 is provided on the left side of the chuck 20 in the figure. At the same time, a hydraulic cylinder 24 that raises and lowers the casing chuck 23 in the chuck 20
(Illustrated in FIGS. 4 and 5). The casing chuck 23 includes a holding portion 23a having an insertion hole through which the casing 16 is inserted, and a hydraulic cylinder 23b that presses the casing 16 from the outer peripheral surface of the casing 16 toward the inner surface on the right side of the holding portion 23a. The casing 16 inserted into the holding portion 23a is provided with a hydraulic cylinder 23b disposed outside the casing 16,
By pressing the grounding auger 17 with the casing into the substantially concave portion of the steel sheet pile 2 by pressing the holding portion 23a substantially opposite to the hydraulic cylinder 23b.

The casing chuck 23 is vertically movably fitted to guide portions 20a, 20a inside the chuck 20, and can be moved up and down by a hydraulic cylinder 24 while being guided by the guide portions 20a, 20a. It has become. A stroke sensor 25 for detecting a stroke of the casing chuck 23 is provided inside the chuck 20.
Is provided. The inner surface of the holding portion 23a and the contact surface of the hydraulic cylinder 23b with the casing 16 are
Grooves 23c corresponding to the ridges 16b of the casing 16 ...
Are formed, and the protrusions 16b of the casing 16 are engaged with one of the grooves 23c, so that the rotation of the casing 16 during excavation can be prevented. As shown in FIGS. 4, 5, and 7, an auxiliary casing chuck 26 that grasps the casing 16 is provided separately from the casing chuck 23 on the lower left side of the chuck 20 in the drawing.
The auxiliary casing chuck 26 is disposed so as to face the fixed holding portion 22a fixedly provided in the chuck 20 and the back surface of the fixed holding portion 22a.
And a hydraulic cylinder 26a that can be extended toward the front. In addition, the fixed holding part 22a is the pile chuck part 2
It is shared with 2. The auxiliary casing chuck 26 can hold the casing 16 below the casing chuck 23 by the fixed holding portion 22a and the hydraulic cylinder 26a.

Next, a method of forming a sheet pile wall by press-fitting the steel sheet pile 2 into the ground using the above-described pile press-in device will be described. First, as shown in FIG. 1, the pile press-in device 10 newly press-fits the steel sheet piles 2 in a state where the existing steel sheet piles 2 are gripped by the clamps 11. At this time, the earth auger 17 is connected to the casing chuck 2 in the chuck 20.
By lowering the casing chuck 23 by the hydraulic cylinder 24 which is the earth auger elevating means while being gripped by 3, the lower part of the steel sheet pile 2 to be pressed is dug first. Next, the earth auger 17 is pulled up by raising the casing chuck 23 holding the casing 16, and the chuck 20 holding the steel sheet pile 2 by the pile chuck portion 22 is lowered by the hydraulic cylinders 15, 15 serving as pile lifting means. And press-fit steel sheet pile 2.

Thus, the steel sheet pile 2 is pushed while the earth and sand is pushed into the space formed by pulling up the earth auger 17.
Is press-fitted, so that the pile can be securely press-fitted even on hard ground, and the pile press-fitting device 10 has its own weight,
Not only the reaction force can be obtained from the weight and pull-out resistance of the existing pile that has been grasped, but also the reaction force can be obtained from the pull-out resistance of the casing 16 when the earth auger 17 is pulled up. It is possible to press-fit the pile with enough room. That is, the pile can be press-fitted in a stable state. Next, in a state where the steel sheet pile 2 and the earth auger 17 are released, the chuck 20 is raised by the hydraulic cylinders 15 and 15, the earth auger 17 is lowered again as described above, and then the ground auger is excavated. The steel sheet pile 2 is press-fitted downward while pulling up 17. Then, by repeatedly performing the above operation, the steel sheet piles 2 are sequentially press-fitted, and finally, the steel sheet piles 2 are press-fitted to a predetermined depth.

Then, as shown in FIG. 1, when the steel sheet pile 2 gripped by the chuck 20 is completely pressed, the chuck 2
The steel sheet pile 2 is removed from 0 and the chuck 20 is raised to a position where the rotation of the chuck 20 is not hindered by the steel sheet pile 2. Then, the chuck 20 is rotated by 180 degrees in the annular support portion 21 so that the convex portion of the U-shaped steel sheet pile 2 to be press-fitted next is opposite to that of the steel sheet pile 2 press-fitted before. At this time, the chuck 20 rotates about the casing 16 and the ridges 16 of the casing 16 as described above.
Since the chuck 20 is rotated in a state where the chuck 20 is disposed at a predetermined height position where there is no b, the earth auger 17 is inserted into the chuck 20 with the earth auger 17 having a portion excluding the upper part buried in the ground. Can be rotated without rotating the chuck 20. Therefore, it is not necessary to raise the earth auger 17 to a height that does not hinder the rotation of the chuck 20 with a crane as in the related art. When the chuck 20 is disposed at the upper end of the casing 16, the ridge 16b of the casing 16 and the chuck 2
0 is disengaged. However, the casing 16
Groove 2 of the casing chuck 23 with which the ridge 16b is engaged.
Are arranged at regular intervals from each other, and the grooves 23c are arranged every 90 degrees. Therefore, when the chuck 20 is rotated by 180 degrees with respect to the casing 16, The positions of the 16 ridges 16b and the positions of the grooves 23c provided in the casing chuck 23 again coincide. Therefore, in this state, for example, if the casing 16 is raised with respect to the chuck 20, the casing 16 is engaged with the chuck 20 again. The predetermined height position of the casing 16 where the protrusion 16b is not provided may not necessarily be the upper end of the casing 16, but may be a state in which the chuck 20 is disposed at the upper end of the casing 16, that is, the casing 16 It is preferable that the chuck 20 be rotatable with respect to the casing 16 in a state in which a portion excluding the upper end portion is substantially buried in the ground and supported by the ground.

Next, the earth auger 17 is pulled out of the ground. In this case, the casing chuck 23 holding the earth auger 17 is lifted by the hydraulic cylinder 24 because the auxiliary casing chuck 26 is provided. Then, the casing 16 of the earth auger 17 is gripped by the auxiliary casing chuck 26. In this state, the earth auger 17 is released from the casing chuck 23, the casing chuck 23 is lowered, and the earth auger 17 is again held by the casing chuck 23. Then, with the auxiliary casing chuck 26 releasing the earth auger 17, the casing chuck 23 holding the earth auger 17 is raised again. By repeating such an operation, the earth auger can be completely pulled out of the ground. Therefore, even if the earth auger 17 that is not supported by the ground is released from the casing chuck 23, the earth auger 17 does not fall, so that the earth auger 17 can be pulled out of the ground without using a crane. it can. Note that even when the earth auger 17 is pulled out of the ground, the earth auger 17 is not
3, the engagement between the ridge 16b of the casing 16 and the chuck 20 is maintained.

Next, the chuck 20 is advanced to the next pile press-in position by sliding the slide base 13 forward with respect to the saddle 12 of the pile press-in device, and the steel sheet pile 2 is set on the chuck 20; Again, the steel sheet pile 2 is press-fitted as described above. Then, by repeatedly press-fitting the steel sheet pile 2 as described above, a sheet pile wall can be constructed. The pile press-in device 10 is capable of self-running on the steel sheet pile 2, and the pile press-in device 10 can be sequentially advanced to sequentially press-fit the steel sheet pile 2. Then, as described above, after the press-fitting of one steel sheet pile 2 is completed, when the next steel sheet pile 2 is press-fitted, the crane earth auger 17 is used.
The rotation of the chuck 20 and the removal of the earth auger 17 from the ground can be performed without raising the steel sheet pile 2, so that the work from press-fitting one steel sheet pile 2 to press-fitting the next steel sheet pile 2 is simplified. And labor can be saved, and the working time can be shortened. The pile press-in device of the present invention is not limited to the steel sheet pile 2, but may be used for other steel pipe piles, H-type sheet piles, Z-type sheet piles, straight sheet piles, concrete sheet piles, and other piles other than sheet piles. By providing the auxiliary casing chuck 26, the grounding auger 17 with the casing to be dug can be pulled out of the ground without using a crane. In a pile press-fitting device for press-fitting a sheet pile or a pile that does not need to press-fit the steel sheet pile 2 in the right and left opposite directions when press-fitting the next steel sheet pile 2 after press-fitting one steel sheet pile 2 is completed. It is not necessary to prevent the protrusion 16b, that is, the engagement member for preventing rotation with the chuck 20, from being provided at the predetermined height position of 16.

[0019]

According to the pile press-in device of the first aspect of the present invention, by providing the auxiliary casing chuck, the earth auger can be lifted by the casing chuck, the earth auger elevating means and the auxiliary casing chuck without being lifted by a crane. Can be pulled out of the ground. According to the pile press-in device according to claim 2 of the present invention, the chuck is rotated after the steel sheet piles are press-fitted in order to continuously press-fit a plurality of steel sheet piles into the ground by alternately changing the left and right sides of the steel sheet piles. When it is necessary to do, in a state where the chuck is arranged at a predetermined height position where there is no engagement member for rotation prevention of the casing,
By rotating the chuck, the chuck can be rotated without pulling out the casing from the chuck by a crane. Further, if the auxiliary casing chuck is provided as described in claim 1, it is not necessary to lift the earth auger with a crane when press-fitting the next steel sheet pile after press-fitting one steel sheet pile. When press-fitting piles, labor can be saved and working time can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a pile press-fitting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the pile press-in device of the above example.

FIG. 3 is a front view showing the pile press-fitting device of the above example.

FIG. 4 is a side sectional view showing a chuck of the pile press-fitting device of the above example.

FIG. 5 is a partially cutaway side view showing a chuck of the pile press-fitting device of the above example.

FIG. 6 is a partially broken plan view showing a chuck of the pile press-fitting device of the above example.

FIG. 7 is a partially cutaway bottom view showing the chuck of the pile press-in device of the above example.

FIG. 8 is a side view showing a conventional pile press-fitting device.

[Explanation of symbols]

 2 Steel sheet pile (pile) 10 Pile press-in device 15 Hydraulic cylinder (pile lifting / lowering means) 16 Casing 16b Casing ridge (engaging member) 17 Earth auger with casing 20 Chuck 22 Pile chuck part 23 Casing chuck 24 Hydraulic cylinder (Earth auger) Elevating means) 26 Auxiliary casing chuck

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Tsuzuki 3948-1, Fushida, Kochi City, Kochi Prefecture, Japan Giken Co., Ltd. (56) References JP-A-4-179789 (JP, A) JP-A-59-170393 (JP, A) JP-A-3-66828 (JP, A) JP-A-7-3789 (JP, A) JP-A-59-422 (JP, A) JP-A-56-77546 (JP, U) 40-27895 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21B 7/00 E21B 7/20 E02D 7/20 E02D 13/00

Claims (2)

(57) [Claims] 1. A pile press-in device for press-fitting a pile by press-fitting the pile with a ground auger with a casing or near a press-fit portion when the pile is pressed into the ground, comprising: a chuck for gripping the pile; Pile lifting / lowering means for allowing press-fitting of piles by raising / lowering the chuck, casing chuck for holding the casing of the earth auger, and raising / lowering the ground auger along the pile by raising / lowering the casing chuck. A pile press-in device comprising an earth auger elevating means and an auxiliary casing chuck for gripping the casing separately from the casing chuck. 2. A pile press-in device for press-fitting a pile by press-fitting a pile with a ground auger with a casing when press-fitting the pile into the ground. A chuck rotatable to rotate, and a pile lifting / lowering unit that enables press-fitting of the pile by raising and lowering the chuck, and, in the chuck, a casing chuck that grips a casing of the earth auger, Ground auger elevating means for raising and lowering the earth auger along the pile by raising and lowering the casing chuck is provided. The casing is prevented from rotating around its axis by engaging the chuck. The engaging member to be provided is provided along the axial direction of the casing except for a portion at a predetermined height position of the casing. Pile indentation device to.