JP7182987B2 - Pile press-in device - Google Patents

Description

The present invention relates to a pile press-in device.

As described in Patent Documents 1 and 2, the conventional pile press-in device includes a saddle that fixes the machine body to a pile row composed of existing piles for reaction force, and a front-back direction installed inside the saddle. A chuck for press-fitting and extracting a pile that can move up and down is provided via a slide mechanism. The pile press-in device grips the existing pile with a clamp provided on the saddle, presses the pile into the tip of the row of piles with a chuck using the existing pile as a reaction force means, and moves the machine body over the extended pile row. Lay the piles in order. The procedure for moving the fuselage is to use a chuck to hold the high part of the pile that is being pressed in at the end of the row of piles, loosen the clamp to raise the fuselage, move the fuselage forward with the slide mechanism provided on the saddle, and lower the fuselage. The movement is terminated by tightening the clamp. At the new position after this movement, press-fitting of the pile in the middle of press-fitting is continued. By reversing this operation, the pile can be pulled out.

Loading of piles into the chuck is generally performed using a crane. Patent Literature 3 proposes using a crane mounted on a pile press-in device.

JP-A-2000-319880 JP 2004-183442 A JP-A-11-200368

However, in the invention of Patent Document 3, the pivot of the crane is arranged on the side of the saddle, and there is a risk that the weight balance between the left and right sides of the entire pile press-in device will deteriorate.
For example, if a heavy crane is installed to hang long or large piles, it is possible to increase the reaction force due to the weight of the pile press-in device during pile press-in. The tilting moment may be applied to the existing piles for reaction force due to the crane's own weight and lifting load, which may have an adverse effect. Therefore, it is preferable that the pivot of the crane is on the reaction pile. That is, there is a problem that a large-sized crane with a large core and a large weight and capacity cannot be mounted.
If the weight balance of the pile press-in device deteriorates, the pile and the pile press-in device may tilt, which deteriorates the pile press-in accuracy and the pile inclination after construction.

The present invention has been made in view of the above problems in the prior art. The object is to increase the reaction force during pile press-in.

The invention according to claim 1 for solving the above problems is a pile press-in device that takes a reaction force from an existing pile and presses the pile into the ground,
a saddle;
a slide frame supported by the saddle so as to be movable back and forth;
a mast rotatably erected on the slide frame;
a chuck frame supported by the mast so as to be able to move up and down and arranged in front of the saddle;
a chuck device supported by the chuck frame and capable of gripping a pile to be press-fitted;
A pile press-in device main body including a clamp device supported by the saddle, arranged in a plurality in the front-rear direction behind the chuck device, and configured to be able to grip the upper end of the existing pile;
a crane device;
with
In a state where the gripping center of the chuck device arranged at the front center of the saddle is arranged on the longitudinal center line of the saddle, the crane device is arranged in front of the gripping center of the chuck device . and a pivot shaft of the crane device is arranged on the longitudinal center line of the saddle .

The invention according to claim 2 is the pile press-in apparatus according to claim 1 , wherein the crane device is mounted on the chuck frame.

The invention according to claim 3 is the pile press-in according to claim 1 or 2 , wherein a power unit for supplying a driving force to the pile press-in device main body and the crane device is mounted , and the power unit is arranged behind the chuck device. It is a device.

In the invention according to claim 4 , the power unit is
A hydraulic pump that supplies pressurized oil to a hydraulic device that operates the pile press-in device main body;
4. The pile press-in device according to claim 3 , further comprising a hydraulic pump for supplying pressure oil to a hydraulic device for operating the crane device.

According to the present invention, the overall weight balance of a pile press-in apparatus equipped with a crane (especially a large crane) is improved, and the pile press-in accuracy is maintained well, and the reaction force during pile press-in is reduced by the weight of the crane. can be increased.

1 is a top view of a pile press-in device according to Embodiment 1 of the present invention; FIG. Fig. 2 is a right side view of the pile press-in device according to the first embodiment of the present invention; It is a right side view of the pile press-in apparatus which concerns on the form 2 of this invention. It is a top view of the pile press-in apparatus which concerns on the form 3 of this invention. It is a right side view of the pile press-in apparatus which concerns on the form 3 of this invention. 1 is a configuration diagram of a power unit according to an embodiment of the invention; FIG. It is a right view of the pile press-in apparatus main body which concerns on one Embodiment of this invention, and shows a full length shortening state. It is a right view of the pile press-in apparatus main body which concerns on one Embodiment of this invention, and shows a full length extension state. It is a longitudinal sectional view including the axis of the left-right operation cylinder of the clamp device of the pile press-in device main body according to one embodiment of the present invention, (a) shows the state where the clamp device is shifted to the right, and (b) shows the clamp device. Shows left side. It is a right view which shows the process of pile press-in and self-running of the pile press-in apparatus main body which concerns on one Embodiment of this invention. It is a right view which shows the process of pile press-in and self-running of the pile press-in apparatus main body which concerns on one Embodiment of this invention. It is a right view which shows the process of pile press-in and self-running of the pile press-in apparatus main body which concerns on one Embodiment of this invention.

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.

[Installation of crane and power unit]
First, the form regarding the mounting position of the crane apparatus 7 and the power unit 8 to the pile press-in apparatus main body 1, etc. is demonstrated.
(Form 1)
This form is a form in which the crane device 7 and the power unit 8 are mounted on the saddle 2 of the pile press-in device body 1 as shown in FIGS. 1 and 2 .
The pivot shaft 71 of the crane device 7 is arranged behind the gripping range 3 b of the chuck device 3 arranged in the front center of the saddle 2 .
That is, in a state where the gripping center 3a of the chuck device 3 is arranged on the longitudinal center line C of the saddle 2 of the pile press-in device main body 1, the swing axis of the crane device 7 is positioned behind the gripping range 3b of the chuck device 3. 71 are placed.
As a result, the lateral displacement of the pivot 71 of the crane device 7 with respect to the pile that is gripped and press-fitted by the chuck device 3 is kept small, so that the collapse of the lateral weight balance caused by mounting the crane device 7 is suppressed. be done. Preferably, as shown in the figure, a configuration is implemented in which the pivot shaft 71 of the crane device 7 is arranged rearward with respect to the gripping center 3a.

The power unit 8 is a device that supplies driving force to the pile press-in device body 1 and the crane device 7 .
The center of gravity 81 of the power unit 8 is also arranged behind the gripping range 3 b of the chuck device 3 arranged in the front center of the saddle 2 .
As a result, the lateral deviation of the center of gravity 81 of the power unit 8 with respect to the pile that is gripped and press-fitted by the chuck device 3 is kept small, so that the loss of lateral weight balance caused by mounting the power unit 8 is suppressed. Preferably, as illustrated, the center of gravity 81 of the power unit 8 is arranged behind the gripping center 3a.

In this embodiment, the crane device 7 is mounted on the saddle 2 behind the mast 33 .
The power unit 8 is similarly mounted on the saddle 2 behind the mast 33 and arranged between the mast 33 and the crane device 7 . Regardless of this embodiment, the arrangement of the crane device 7 and the power unit 8 may be exchanged, and the crane device 7 may be arranged between the mast 33 and the power unit 8 .

According to this embodiment, since the overall weight balance of the pile press-in device equipped with the crane device 7 and the power unit 8 is good, there is little possibility that the pile will be tilted to the left and right, and the pile press-in accuracy can be maintained satisfactorily. . In addition, the weight of the crane device 7 and the power unit 8 can increase the reaction force when the pile is press-fitted.

(Form 2)
In this embodiment, the crane device 7 is mounted on the chuck frame 35 as shown in FIG.
In contrast to Embodiment 1, the crane device 7 is mounted on the front end of a chuck frame 35 that extends forward from the chuck device 3 without changing the lateral positions of the crane device 7 and the power unit 8 . Therefore, in this embodiment, the crane device 7 is arranged in front of the chuck device 3 and the power unit 8 is arranged behind the chuck device 3 .
The power unit 8 remains mounted on the saddle 2. Since the degree of freedom in arranging the power unit 8 in the longitudinal direction in the saddle 2 increases by the movement of the crane device 7, the power unit 8 can be arranged at an optimum position in consideration of the longitudinal weight balance with the crane device 7.例文帳に追加

A moment M1 that tends to tilt the existing steel pipe pile PS gripped by the pile press-in device main body 1 is generated by the press-fitting force of the steel pipe pile (P1). The moment M2 reduces the moment loaded on the existing steel pipe pile PS.
Therefore, according to this embodiment, the overall weight balance of the pile press-in device equipped with the crane device 7 and the power unit 8 is good. can keep.
In addition, the weight of the crane device 7 and the power unit 8 can increase the reaction force when the pile is press-fitted. Since the left-right and front-rear weight balance of the crane device 7 and the power unit 8 is good, it is easy to adopt a heavy crane device 7 and the power unit 8, and furthermore, the reaction force at the time of pile press-in can be increased.

(Mode 3)
A configuration in which the crane device 7 is mounted on the mast 33 behind the chuck device 3 without changing the positions of the crane device 7 and the power unit 8 in the left-right direction may be applied to the configuration 2 described above.
When the crane device 7 is mounted on the mast 33, the swing shaft 71 of the crane device 7 is positioned backward with respect to the gripping range 3b (from 71a to 71b in FIG. 1) of the chuck device 3 arranged at the front center of the saddle 2. In addition to the configuration in which the rotary shaft 71 of the crane device 7 is arranged, as will be described below, a configuration in which the pivot 71 of the crane device 7 is arranged in front of the gripping range 3b of the chuck device 3 arranged in the front center of the saddle 2 is also possible. can be implemented.
A crane support boom section 36 extends forward from the mast 33 as shown in FIGS. The crane support boom section 36 is integrally formed or fixed to the mast 33 .
As shown in FIG. 4, the crane support boom portion 36 is formed with a hole portion 36a for inserting a pile gripped by the chuck device 3 at the same position as the chuck frame 35. The hole portion 36a is formed with a steel pipe pile (P1 ) can be gripped by the inserting chuck device 3 .
A hole portion 36b is formed in the front end portion of the crane support boom portion 36 in front of the hole portion 36a. The hole 36b is for mounting and fixing a crane, and its center corresponds to the pivot shaft 71 of the crane device 7 (the crane device is not shown in FIGS. 4 and 5).
Further, the outer shape 36c of the crane support boom portion 36 is shaped so as not to interfere with the cylinder device 34 that moves the chuck frame 35 up and down. As shown in FIG. 5, the crane support boom portion 36 extends forward through above the lifting stroke of the chuck frame 35 . Therefore, the chuck frame 35 (chuck device 3) can be raised and lowered without any trouble.
According to the embodiment in which the crane device 7 is mounted on the mast 33 as described above, the crane device 7 does not move up and down as the chuck frame 35 moves up and down for pile press-in work and the like, which is efficient.

A moment M1 that tends to tilt the existing steel pipe pile PS gripped by the pile press-in device main body 1 is generated by the press-fitting force of the steel pipe pile (P1). The moment M2 reduces the moment loaded on the existing steel pipe pile PS.
Therefore, according to this embodiment, the overall weight balance of the pile press-in device equipped with the crane device 7 and the power unit 8 is good. can keep.
In addition, the weight of the crane device 7 and the power unit 8 can increase the reaction force when the pile is press-fitted. Since the left-right and front-rear weight balance of the crane device 7 and the power unit 8 is good, it is easy to adopt a heavy crane device 7 and the power unit 8, and furthermore, the reaction force at the time of pile press-in can be increased.

(Configuration of power unit)
The power unit 8 is a device that supplies driving force to the pile press-in device body 1 and the crane device 7 . Specifically, since the pile press-in device main body 1 and the crane device 7 are hydraulically driven, as shown in FIG. , a hydraulic pump 8B that supplies pressure oil to a hydraulic device that operates the crane device 7, and an engine 8E that drives the hydraulic pumps 8A and 8B.
As shown in FIG. 6, a hydraulic pump 8A and a hydraulic pump 8B are provided separately. This makes it easy to maintain the respective working forces of the pile press-in device main body 1 and the crane device 7 at the same time.
In FIG. 6, the engine 8E for driving the hydraulic pump 8A and the hydraulic pump 8B is shared, but the engine for driving the hydraulic pump 8A and the engine for driving the hydraulic pump 8B may be separately provided.
1 to 6, one power unit 8 is used, but one power unit is equipped with a hydraulic pump 8A and an engine for driving it, and another unit is equipped with a hydraulic pump 8B and an engine for driving it. You may equip the pile press-in apparatus main body 1 with the power unit of a base.

[Outline of the pile press-in device]
First, the pile press-in device main body 1 will be described with reference to FIGS. 7 to 11. FIG.
As shown in FIGS. 7, 8 and 9, the pile press-in device main body 1 of this embodiment is a pile press-in device that presses a steel pipe pile (P1) into the ground G by taking a reaction force from the existing steel pipe pile PS. , a saddle 2 , a chuck device 3 , a first clamping device 4A, a second clamping device 4B and a third clamping device 5 .
The saddle 2 corresponds to a body main frame that supports each part, and is elongated in the front-rear direction.
The first clamping device 4A and the second clamping device 4B correspond to intermediate clamping devices. Intermediate clamping devices 4A, 4B are arranged below the saddle 2. As shown in FIG. The two intermediate clamping devices 4A, 4B consist of a first clamping device 4A arranged on the front side and a second clamping device 4B arranged on the rear side.
The third clamping device 5 corresponds to the rear clamping device.
A chuck device 3, intermediate clamp devices 4A and 4B, and a rear clamp device 5 are connected in the longitudinal direction of the pile press-in device main body 1. As shown in FIG. These are arranged in order of the chuck device 3, the first clamp device 4A, the second clamp device 4B, and the third clamp device 5 from the front side.
The intermediate clamping devices 4A, 4B and the rear clamping device 5 are each configured to be able to grip the upper end of the existing steel pipe pile PS.
The chuck device 3 is configured to be able to grip the steel pipe pile (P1) to be press-fitted from the outside, and can grip an arbitrary height position of the steel pipe pile (P1).
The clamp devices 4A, 4B, and 5 are gripping mechanisms that grip by opening a plurality of clamp members inserted into the existing steel pipe pile PS, and the chuck device 3 is a plurality of chuck devices toward the center of the insertion portion into which the steel pipe pile (P1) is inserted. by a gripping mechanism that advances and retracts the chuck member. Both are conventionally used.

The mechanical configuration from the saddle 2 to the chuck device 3 is as follows.
A first slide frame 31 is supported by the saddle 2 so as to be movable forward and backward by driving a cylinder device 32 . A mast 33 is erected on the first slide frame 31 so as to be rotatable. A chuck frame 35 is supported on the mast 33 so as to be vertically movable by driving a cylinder device 34 . A chuck device 3 is provided on the chuck frame 35 .

The mechanical configuration from the saddle 2 to the clamping device is as follows.
A second slide frame 51 is supported by the saddle 2 so as to be movable forward and backward by driving a cylinder device 52 . A lift frame 54 is supported by the second slide frame 51 so as to be movable up and down by driving the cylinder device 53 . The third clamp device 5 is supported by the lower end of the lift frame 54 and can be arranged behind the saddle 2 at the same height as the intermediate clamp devices 4A and 4B.

A front-rear slider 41 is supported on the saddle 2 so as to be movable in the front-rear direction by being driven by a cylinder device 42 . A left-right slider 43 is supported on the front-rear slider 41 so as to be movable in the left-right direction by being driven by a cylinder device 44 . The first clamp device 4A and the second clamp device 4B are supported by the lower ends of the left and right sliders 43. As shown in FIG.
The third clamping device 5 also has the same horizontal movement mechanism. It is

With the above mechanical configuration, the chuck device 3 and the intermediate clamp devices 4A, 4B can be moved up and down relative to each other, and the intermediate clamp devices 4A, 4B and the rear clamp device 5 can be moved relative to each other. vertical movement and forward/backward movement are enabled.
The chuck device 3 can swing left and right by turning the mast 33 .
Therefore, all of the chuck device 3, the intermediate clamp devices 4A and 4B, and the rear clamp device 5 are capable of lateral movement.
In addition, the first clamping device 4A and the second clamping device 4B can be moved back and forth relative to each other.

As shown in FIGS. 7 and 10(a), the pile press-in device main body 1 holds the upper end of the existing steel pipe pile PS by the intermediate clamp devices 4A and 4B and the rear clamp device 5, and the chuck device 3 is By moving up and down, the steel pipe pile (P1) gripped by the chuck device 3 can be press-fitted into the ground G.
The steel pipe pile (P1) is gripped by the chuck device 3, and the chuck frame 35 and the chuck device 3 are lowered by driving the cylinder device 34, thereby pushing down the steel pipe pile (P1) gripped by the chuck device 3 and pressing it into the ground. do. In addition, the rotation function of the chuck device 3 allows the steel pipe pile (P1) to be rotated about its central axis and pressed down into the ground.
As the press-fitting of the steel pipe pile (P1) progresses, the chuck device 3 is opened to release the grip of the steel pipe pile (P1), the chuck frame 35 and the chuck device 3 are raised by driving the cylinder device 34, and the steel pipe pile (P1 ), and further press-fitting or rotational press-fitting can be continued to press-fit the steel pipe pile (P1) into the ground G to a desired depth.

A steel pipe pile ( P2) is gripped by the chuck device 3, and the upper end of the existing steel pipe pile PS3 is gripped by the rear clamp device 5, and the intermediate clamp devices 4A and 4B are separated from the existing steel pipe piles PS1 and PS2 and moved back and forth. can do

[Self-propelled method on pile of pile press-in device]
Next, a self-running method on piles of the pile press-in device body 1 using the operation function described above will be described with reference to FIGS. 10 to 12. FIG.
As shown in FIG. 10(a), the upper ends of the existing steel pipe piles PS1, PS2, PS3 are gripped by the intermediate clamp devices 4A, 4B and the rear clamp device 5, and the steel pipe pile P1 gripped by the chuck device 3 is placed on the ground. Press into G. This steel pipe pile P1 is pushed down to the same level as the front existing steel pipe pile PS1 gripped by the intermediate clamp device 4A, and the press-fitting construction of the steel pipe pile P1 is completed.
After the steel pipe pile P1 has been press-fitted, the cylinder device 32 (see FIGS. 7 and 8) and the cylinder device 52 (see FIGS. 7 and 8) are driven to move the mast 33 forward by one pile pitch, as shown in FIG. 10(b). 2, the steel pipe pile P2 is inserted into the chuck device 3 and gripped by the chuck device 3. As shown in FIG.
Subsequently, as shown in FIG. 10(c), the steel pipe pile P2 gripped by the chuck device 3 is press-fitted into the ground G until a predetermined bearing force is obtained.

Next, the intermediate portion advance process is executed as shown in FIG. 11(a)→FIG. 11(b)→FIG. 11(c).
That is, the chuck device 3 grips the steel pipe pile P2 two pile pitches ahead of the first clamp device 4A, and the upper end of the existing steel pipe pile PS3 is gripped by the rear clamp device 5. from the existing steel pipe piles PS1, PS2 and move forward, and the upper ends of the steel pipe piles P1, PS1 one pile pitch ahead are gripped by the intermediate clamp devices 4A, 4B. (The steel pipe pile P1 is gripped by the first clamp device 4A, and the steel pipe pile PS1 is gripped by the second clamp device 4B.)

Next, the rear part advance process is executed as shown in FIG. 12(a)→FIG. 12(b)→FIG. 12(c).
That is, the rear clamp device 5 is separated from the existing steel pipe pile PS3 and moved forward, and the existing steel pipe pile one pile pitch ahead of the existing steel pipe pile PS3 held by the rear clamp device 5 in the intermediate portion moving step The upper end of PS2 is gripped by the rear clamping device 5 .
As a result, as shown in FIG. 12(c), the pile press-in device main body 1 is in the same device configuration as that shown in FIG. In this state, the press-fitting of the steel pipe pile P2 gripped by the chuck device 3 is continued and pushed down to the same level as the existing steel pipe pile, and the press-fitting construction of the steel pipe pile P2 is completed. Therefore, by repeating the above process, new steel pipe piles can be press-fitted into the ground G at a predetermined pile pitch to build a pile row of steel pipes and move forward on the same pile row.

Regardless of the above embodiment, a conventional pile press-in device (see Patent Document 2) omitting the rear clamp device 5 and the mechanism for connecting this to the saddle 2 may be applied. In that case, the number of clamps arranged under the saddle 2 may be increased to three.
According to the pile press-in device main body 1 having the rear clamp device 5, stable self-running is possible even if the saddle 2 is elongated in the front-rear direction. In addition, it is easy to implement a form in which the crane device 7 and the power unit 8 are arranged side by side on the saddle 2 in the front-rear direction.

Moreover, since the crane device 7 and the power unit 8 are mounted on the pile press-in device as in Embodiments 1, 2, and 3, a separate crane device and power unit are not required, and the independent moving body is simplified. For example, after the conventionally used pile press-in device, a self-propelled crane and a power unit that self-propelled on the pile rows become unnecessary, reducing the number of moving bodies and shortening the total length of the system.
In addition, although the above embodiment demonstrated what corresponded to the steel pipe pile, the pile to apply is not limited to a steel pipe pile. The present invention is also effective for piles such as concrete piles (columns) that tend to break when a moment is applied.

1 Pile press-in device body 2 Saddle 3 Chuck device 3a Gripping center 3b Gripping range 4A, 4B, 5 Clamp device 7 Crane device 8 Power unit 8A Hydraulic pump 8B Hydraulic pump 8E Engine 33 Mast 35 Chuck frame 71 Rotating shaft 81 Center of gravity G Ground P1, P2 Steel pipe pile PS Existing steel pipe pile

Claims (4)

A pile press-in device for press-fitting a pile into the ground by taking a reaction force from an existing pile,
a saddle;
a slide frame supported by the saddle so as to be movable back and forth;
a mast rotatably erected on the slide frame;
a chuck frame supported by the mast so as to be able to move up and down and arranged in front of the saddle;
a chuck device supported by the chuck frame and capable of gripping a pile to be press-fitted;
A pile press-in device main body including a clamp device supported by the saddle, arranged in a plurality in the front-rear direction behind the chuck device, and configured to be able to grip the upper end of the existing pile;
a crane device;
with
In a state where the gripping center of the chuck device arranged at the front center of the saddle is arranged on the longitudinal center line of the saddle, the crane device is arranged in front of the gripping center of the chuck device . and a pivot shaft of the crane device is arranged on the longitudinal centerline of the saddle . The pile press-in device according to claim 1, wherein the crane device is mounted on the chuck frame. A power unit that supplies driving force to the pile press-in device body and the crane device is mounted ,
The pile press-in device according to claim 1 or 2 , wherein the power unit is arranged behind the chuck device . The power unit is
A hydraulic pump that supplies pressurized oil to a hydraulic device that operates the pile press-in device main body;
The pile press-in device according to claim 3 , further comprising a hydraulic pump for supplying pressure oil to a hydraulic device for operating the crane device.

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