JP5105538B2 - A vibration pile driving machine having a climbing function and a vibration pile driving method having a climbing process. - Google Patents

Description

  The present invention is a vibration type improved so that a pile can be driven strongly even if there is an obstacle above the pile driving point and the height of the space that can be used for work is low The present invention relates to a pile punching machine and a pile driving method.

Many characteristics of pile punching machines are subject to evaluation, and are examined from various aspects such as penetration into the ground, safety, durability, maintainability, and operational reliability.
Although many of these characteristics are correlated with each other, it is not simple, but the model to be used is selected based on these comparative studies.
In relation to these characteristics, the working conditions at the pile punching work site are preferentially studied, and it is impossible to employ a pile punching machine that can adapt to these working conditions.
Therefore, from the standpoint of a pile punching machine manufacturer, it is necessary to develop a pile punching machine that can adapt to various predicted working conditions and cultivate demand.

One important working condition is the problem of overhead obstacles. That is, for example, when a pile is placed below the bridge, the height of the space that can be used for work is limited by the lower surface of the bridge.
The relationship between the model and the empty head (height of usable space) in the conventional pile punching machine will be described below.
FIG. 2A is a schematic diagram depicting a state in which piles are driven by a press-fitting pile punching machine.
The press-fit pile punching machine 3 includes a through-type chuck 5 having a structure in which the pile 2 is vertically penetrated and gripped.
When the penetrating chuck 5 is pushed downward, the pile 2 is penetrated into the ground 1.
This press-fit pile punching machine 3 can place a long pile as long as it is not longer than the height of the overhead obstacle (not shown), and can also pull out the pile. In general, the pile driving machine is called a pile punching machine. It is a pile punching machine if it can be pulled out without actually pulling out the pile.

FIG. 2 (B) is a schematic diagram depicting a state in which a pile is driven by a vibration pile punching machine.
The upper end of the pile 2 is gripped by the pile top mounted chuck 6.
The penetration type chuck and the pile top mounting type chuck are named so that the functions can be easily understood, and are not commonly used names.
In recent technology, the press-fitting pile punching machine is all equipped with a through-type chuck, and the vibration-type pile punching machine is equipped with a pile-top mounted chuck with a few exceptions.

The pile top mounted chuck 6 is fixed to the lower end of the vibration pile punching machine 4. The vibration pile punching machine 4 is suspended by a crane 8 via a lifting tool 7.
Since it is such a structure, the room which can accommodate the pile top mounting type | mold chuck 6, the vibration pile punching machine 4, the lifting tool 7, and the crane 8 (the wire hooking part) above the upper end of the pile 2 is required. To do. Therefore, it is impossible to hit a pile having a length equal to the height dimension of the overhead obstacle (not shown).
JP-A-10-99781

A comparison between the prior art shown in FIG. 2 (A) and the prior art shown in FIG. 2 (B) can be outlined as follows.
A press-in pile punching machine equipped with a through-type chuck is not subject to restrictions due to overhead obstacles, but the pile driving force (the ability to penetrate into the ground) is relatively small,
The vibration pile punching machine equipped with the pile top mounted chuck is easily restricted by overhead obstacles although the driving force of the pile is large.
Incidentally, a vibration pile punching machine having a structure capable of penetrating a pile is proposed in Japanese Patent Application Laid-Open No. 10-99781. However, this known invention describes “an eccentric weight and a drive thereof for penetrating a pile into a vibrator. It is a creation related to “arrangement of members”, and it is not specifically disclosed how to attach the vibrator to the pile and how to operate and place the pile.

The present invention has been made in view of the above-described circumstances, and the object is as follows.
A vibration pile punching machine with a significantly greater driving force than a press-fitted pile punching machine, which is less susceptible to overhead obstacles and has a length equal to the height of overhead obstacles. The present invention provides a pile punching machine and a pile punching method.

In order to achieve the above object, the configuration of the inventive device according to claim 1 includes a vibration generating unit, a pile punching chuck unit, and a climbing unit.
The vibration generating unit has an annular shape or a U-shape, and vibration sources composed of eccentric weights are arranged symmetrically on both sides of the pile.
The pile punching chuck unit is integrally connected to the vibration generating unit and sandwiches the pile from both sides.
The climbing unit includes a vertical elevating cylinder attached to the vibration generating unit, and a self-weight support chuck that clamps the pile from both sides. When the elevating cylinder extends, the pile punching chuck The unit and the self-weight support chuck are separated from each other, and when the lifting cylinder contracts, both the chucks approach each other.

In addition to the constituent features of the invention of claim 1, the configuration of the invention device according to claim 2 is mounted on a carriage or placed on the ground and can move in the horizontal direction.
And the pile support tool which supports the lower end part of a pile and maintains this pile in a vertical attitude | position is provided as an attached apparatus, It is characterized by the above-mentioned.

The invention method according to claim 3 is to place a super vibration unit comprising a plurality of eccentric weights, with the center of gravity positioned at the center line of a vertically oriented pile,
A pile punching chuck unit that can sandwich a portion other than the top of the pile is integrally fixed to the lower side of the vibration unit,
Separately from the above-mentioned pile punching chuck unit, a self-weight support chuck that can sandwich a portion other than the top of the pile is configured, spaced apart from the vibration generating unit, and disposed above,
Connected between the vibration generating unit and the self-weight support chuck with an elevating cylinder extending and contracting in the vertical direction,
A. A preparatory step of raising the self-weight support chuck by extending the elevating cylinder in a state where the pile is sandwiched by the pile punching chuck unit and the self-weight support chuck is loosened.
B. While holding the pile with the lifted self-weight support chuck and loosening the pinching of the pile punching chuck unit, the lifting cylinder is contracted, and the pile punching chuck unit and the vibration exciter unit fixed thereto are mounted. With the climbing process to raise.
C. The pile driving chucking unit sandwiches the pile with the pile punching chuck unit and rotates the eccentric weight of the vibration generating unit so as to penetrate the pile into the ground.

In addition to the structural requirements of claim 3, in the invention method according to claim 4, when starting to drive the pile, the pile is kept in a vertical posture by a support device mounted on the carriage or a holder placed on the ground,
After the lower end of the pile penetrates into the ground and becomes capable of self-supporting, the support is retracted.

If the inventive device of claim 1 is applied,
By the cooperation of the climbing unit and the pile punching chuck unit, the pile punching chuck unit coupled to the vibration generating unit can be lifted along the pile by the extension stroke dimension of the climbing cylinder.
By this climbing operation, the vibration unit and the pile punching chuck unit that are integrally connected rise to the pile,
By operating the vibration generating unit, the pile can be penetrated into the ground by the raised dimension.
Since the above ascending dimension is equal to the extension stroke dimension of the climbing cylinder, it is short compared to the length of the pile. Can be reached, and almost the entire length of the pile can penetrate into the ground.
As is clear from the above-described operation, when the pile is driven by the inventive device of claim 1, the space above the pile is not used, so that even if an overhead obstacle exists, no interference is received. That is, a pile having a length equal to the height of the overhead obstacle can be placed.
Moreover, since the vibration pile driving that vibrates the pile by the vibrator is carried out, the ability to penetrate the pile into the ground is strong, and the pile is driven with high efficiency even on relatively hard ground. be able to.

When the invention apparatus according to claim 2 is applied,
In addition to the effects of the invention of claim 1 described above, the piles to be placed can be safely and reliably transported to the placement point without being obstructed by overhead obstacles, and held vertically on the ground of the placement point. can do.
Thereby, the pile driving work by the invention apparatus of claim 1 can be started safely and quickly, and the pile driving work is performed with high efficiency.

When the invention method according to claim 3 is applied,
Since the center of gravity of the vibration generating unit coincides with the center line of the pile, it is easy to hold the pile vertically, and there is no risk of the pile falling down, which is safe.
And a powerful vibration-type pile driving | operation is performed without using the upper space of a pile by performing a preparation process, a climbing process, and a driving-in process sequentially. For this reason, even if there is an overhead obstacle, a long pile can be driven up to a limit that does not interfere with this.

When the invention method according to claim 4 is applied,
The effect of the invention of claim 3 can be obtained, and the pile to be driven can be safely, quickly and surely transported and held vertically without being obstructed by overhead obstacles. Can do.
Thereby, the method of the invention according to claim 3 can be started easily and smoothly, and the entire pile construction work is performed with high efficiency.

The structure of the device of the present invention will be described in detail later with reference to FIG. 1, but prior to that, the overall flow of the pile driving work according to the present invention will be outlined with reference to FIG.
FIG. 3 is a conceptual diagram for explaining the basic idea of the present invention, and is not a substantial embodiment.
In this figure, the aim is to drive a pile 2 that is substantially the same as the height of the overhead obstacle 9 and has a slightly shorter length.
A pile support 11 is mounted on the carriage 10, and the pile 2 is supported by the pile support 11 so as to be vertically slidable.

Assume a vibrating pile punching machine 12 that can climb (climb) along the pile 2. The specific configuration will be described later with reference to FIG. 1, but this conceptual diagram (FIG. 3) represents a vibration pile punching machine provided with a climbing mechanism and a chuck mechanism.
The circular roller drawn with a virtual line is a symbol mark of the climbing mechanism, and is not an actual member. The same applies to the chuck mechanism drawn in phantom lines.
A pile support 11 is mounted on the carriage 10.

The pile support tool 11 supports the pile 2 in a vertical posture and slidable in the vertical direction.
In the state of FIG. 3 (A), the oscillating pile punching machine 12 capable of climbing abuts in a form placed on the upper surface of the pile support 11 and holds the pile 2 by the chuck mechanism. It is held without falling.
The said pile support tool 11 should just be able to support the pile 2 vertically and slidably, but in order to perform operation demonstrated later with reference to this FIG.3 (C), with respect to the pile 2 It is desirable that the structure be detachable in the horizontal direction.
In other words, for example, it may be configured in a vertically divided cylindrical shape instead of a simple cylindrical shape. Similarly, the carriage 10 has a structure that can be moved away from the pile.

As shown in FIG. 3 (A), the work of attaching the pile 2 to the pile support 11 and supporting it or mounting the vibration pile punching machine 12 capable of climbing the pile 2 is away from the overhead obstacle 9. Do it at the place.
Then, after adjusting the posture as shown in FIG. 3 (A), the carriage is moved to a pile driving point below the overhead obstacle 9 as shown in FIG. 3 (B). This movement may use a sledge without using a carriage. Further, the carriage may be a wheeled vehicle or a tracked vehicle (crawler).

(Refer FIG. 3 (B)) The position of the up-down direction when the vibration pile punching machine 12 which can be climbed is mounted on the pile support tool 11 is named support level 12K.
A position climbed (moved up) for one stroke by a climbing mechanism described later with reference to FIG. 1 is referred to as a climbing level 12U.
When the pile punching machine 12 that can climb the pile 2 that chucks the pile 2 at the climbing level 12U is oscillated to give the pile 2 intense vibration in the vertical direction, the pile 2 penetrates into the ground as depicted by a virtual line. .

When the vicinity of the lower end portion of the pile 2 is driven into the ground and the pile 2 can stand on its own, the support tool 11 is detached from the pile 2 as shown in FIG.
Thereafter, almost the entire length of the pile 2 can be penetrated into the ground by repeating climbing and descending.
After the pile 2 is driven into the ground, it is possible to easily remove the vibrating pile punching machine 12 that can be climbed even if the top of the pile 2 slightly protrudes above the ground.

FIG. 1 shows a cross-sectional view of a vibration pile punching machine equipped with a climbing mechanism necessary for performing the climbing pile driving operation described above.
An outline of the characteristics of the apparatus of this example is as follows.
a. The pile can be penetrated in the center.
b. The vibration generating unit 13, the pile punching chuck unit 14, and the climbing unit 15 are included.
c. The center of gravity of the entire apparatus is located on the center line of the pile 2.
As shown in FIG. 3A, considering the safety when moving the pile 2 and the vibrating pile punching machine 12 that can be climbed on a carriage, if the center of gravity of the vibrating pile punching machine is not on the center line of the pile You can understand that you don't have to.

The vibration generating unit 13 includes two sets of vibration generating mechanisms including a fixed eccentric weight 13b fixed to the synchronous gear 13a and a movable eccentric weight 13c fixed to a synchronous gear 13a 'different from the above. .
The two sets of vibration generating mechanisms are arranged symmetrically with respect to the center line of the pile 2. Thereby, the center of gravity of the vibration generating unit 13 is located on the center line of the column 2.
Regarding the means for controlling the two sets of vibration generating mechanisms (combinations of fixed eccentric weight and movable eccentric weight) on both sides of the pile and interlocking the two sets of vibration generating mechanisms with each other, It is recommended to apply the technique disclosed in Kaihei 10-99781.

The pile punching chuck unit 14 includes a cylinder 14a, a piston 14b, and a chuck claw 14c, and sandwiches the pile 2 from both sides. In this example, both chuck claws on both sides of the pile are movable chuck claws, but one may be a fixed claw.
This pile punching chuck unit is fixed to the lower side of the vibration generating unit 13, and has a role of transmitting vibration generated by the vibration generating unit to the pile.

The climbing unit 15 includes a self-weight support chuck 15a and a lifting cylinder 15b.
The self-weight support chuck does not need to play a role of transmitting vibration to the pile, and has a role of supporting the self-weight of the vibration pile punching machine with respect to the pile. It is configured separately from the vibration generating unit 13.
The self-weight support chuck 15a has a structure in which the pile 2 is sandwiched from both sides, and preferably the gravity center thereof is positioned on the center line of the pile 2. However, any type of chuck may be applied when implementing the present invention.

The elevating cylinder 15b is interposed between the vibration generating unit 13 and the self-weight support chuck 15a, and pushes or pulls them away from each other. Accordingly, the elevating cylinder is disposed in the vertical direction.
In this example, the cylinder bottom is directed downward and the piston rod is directed upward, but this is not restrictive.

The vibration pile punching machine shown in FIG. 1 must be able to perform a climbing operation (upward movement) along the pile as described above with reference to FIG.
Next, the action of climbing by the vibration pile punching machine of FIG. 1 will be described.
From the state of FIG. 1, the pinching of the pile 2 by the self-weight support chuck 15a is loosened,
Elevating cylinder 15b is extended to lift its own weight support chuck 15a,
The pile 2 is sandwiched by the weight supporting chuck 15a at the lifted position,
When the elevating cylinder 15b is contracted while the pile 2 is sandwiched by the self-weight support chuck 15a, the drive unit 13 and the pile punching chuck unit 14 fixed to the drive unit 13 are pulled up.
When the pile 2 is pinched by the pile punching chuck unit in the pulled up state, the “combined body of the vibration exciting unit 13 and the pile punching chuck unit” rises from the state of FIG.

The ascending dimension in this case is equal to the expansion / contraction stroke of the elevating cylinder 15.
When this operation is repeated as one cycle, the vibration pile punching machine shown in FIG. 1 climbs the pile in a so-called worm type.
When climbing for one cycle and generating vibration, the pile vibrates up and down and penetrates into the ground. The penetration depth in this case corresponds to the dimension that the vibration pile punching machine has risen in advance. Therefore, it is equal to the expansion / contraction stroke dimension of the elevating cylinder 15b.

As an embodiment different from the above, vibration may be generated after the vibration pile punching machine climbs for two cycles to penetrate the pile into the ground, or vibration may be generated by climbing n cycles. However, n is an integer of 3 or more. It can also be piled up by stopping it in the middle of the cycle and generating vibration. These application examples belong to the technical scope of the present invention.
However, considering the stability of the support state of the pile on which the vibration pile punching machine is mounted, it is desirable not to climb to a very high level.

If the placement of ready-made piles is roughly classified into a press-fitting type and a vibration type, the embodiment belongs to the vibration pile driving.
According to the present invention, as will be understood with reference to FIGS.
Compared to the press-in type, it is a vibration type that has a significantly higher penetration.
In addition, as with the press-fitting type, it is difficult to be restricted by overhead obstacles, and a pile having a length approximately equal to the height dimension of the overhead obstacle can be placed.

It is sectional drawing on which 1 embodiment of the vibration type pile punching machine provided with the climbing function which concerns on this invention was drawn. It is the schematic diagram shown in order to demonstrate the placement method of a pile, Comprising: (A) is a press-fitting type, (B) is drawing a vibration type, respectively. It is a schematic diagram of the vibration pile driving method which has the climbing process which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ground 2 ... Pile 3 ... Pressed pile punching machine 4 ... Vibration pile punching machine 5 ... Penetration type chuck 6 ... Pile top mounting type chuck 7 ... Suspension tool 8 ... Crane 9 ... Overhead obstacle 10 ... Dolly 11 ... Pile support tool DESCRIPTION OF SYMBOLS 12 ... Vibration pile punching machine which can climb 13 ... Excitation unit 13a, 13a '... Synchronous gear 13b ... Fixed eccentric weight 13c ... Movable eccentric weight 14 ... Pile punch chuck unit 14a ... Cylinder 14b ... Piston 14c ... Chuck claw 15 ... climbing unit 15a ... own weight support chuck 15b ... lifting cylinder

Claims (4)

It has a vibration unit, a pile punching chuck unit, and a climbing unit.
The vibration generating unit has an annular shape or a U-shape, and vibration sources composed of eccentric weights are arranged symmetrically on both sides of the pile.
The pile punching chuck unit is integrally connected to the vibration generating unit and sandwiches the pile from both sides.
The climbing unit includes a vertical elevating cylinder attached to the vibration generating unit, and a self-weight support chuck that clamps the pile from both sides. When the elevating cylinder extends, the pile punching chuck A vibratory pile punching machine having a climbing function, wherein the unit and its own weight supporting chuck are separated from each other, and when the lifting cylinder contracts, both the chucks approach each other. It is mounted on a cart or placed on the ground and can move horizontally.
And the pile support tool which supports the lower end part of a pile and maintains this pile in a vertical attitude | position is provided as an accessory, The vibration-type pile driving | operation with the climbing function of Claim 1 characterized by the above-mentioned. Punching machine. Position the center of gravity on the center line of the pile in the vertical position, and arrange the vibration unit consisting of multiple eccentric weights,
A pile punching chuck unit that can sandwich a portion other than the top of the pile is integrally fixed to the lower side of the vibration unit,
Separately from the above-mentioned pile punching chuck unit, a self-weight support chuck that can sandwich a portion other than the top of the pile is configured, spaced apart from the super vibration unit, and disposed above,
Connected between the vibration generating unit and the self-weight support chuck with an elevating cylinder extending and contracting in the vertical direction,
A. A preparatory step of raising the self-weight support chuck by extending the elevating cylinder in a state where the pile is sandwiched by the pile punching chuck unit and the self-weight support chuck is loosened.
B. While holding the pile with the lifted self-weight support chuck and loosening the pinching of the pile punching chuck unit, the lifting cylinder is contracted, and the pile punching chuck unit and the vibration exciter unit fixed thereto are mounted. With the climbing process to raise.
C. It is characterized by performing a driving process of pinching the pile into the ground by pinching the pile with a pile punching chuck unit at the pulled-up position and rotating the eccentric weight of the vibration generating unit, A vibration pile driving method having a climbing process. When starting to drive the pile, keep the pile in a vertical posture with the support mounted on the carriage or the holder placed on the ground,
4. The vibration pile driving method having a climbing process according to claim 3, wherein the support is retracted after the lower end of the pile penetrates into the ground and becomes self-supporting.

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