JP2001140573A - Pile driving/extracting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile driving/extracting machine capable of efficiently conducting the driving work and extracting work of a pile and coping with the difference in the width of the pile to be applied. SOLUTION: This pile driving/extracting machine is provided with a leader 1 supported by a machine main body M, a pair of the right and left lift bodies 2, 2 individually liftable along the leader 1, revolving arms 3 fitted to the lift bodies 2 horizontally removably, auger screws 5 held on the revolving arms 3, auger screw rotatively driving devices 6 rotatively driving the auger screws 5, casings 7 outwardly fitted to the auger screws 5, and pile hanging chuck devices 8 provided on the outer peripheries of the casings 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile construction machine used for driving a pile into the ground or pulling an existing pile from the ground.

[0002]

2. Description of the Related Art Conventionally, in the work of driving a pile into the ground,
After using a single auger screw whose outer periphery is surrounded by a casing and rotating the auger screw to excavate the ground, the first pile suspended on the outer peripheral surface of the casing is driven to a predetermined depth in the ground, and then the pile is driven. The auger screw is pulled up with the casing while leaving in the ground, then the second pile is turned in the opposite direction to the first pile, and while excavating the area adjacent to the first excavation point, the first end is excavated. Driving to a predetermined depth in the ground in a form that engages with the opposing end of the pile of the pile, and by repeating the same process thereafter, a series of pile rows that are driven alternately to each other in the ground Has formed.

[0003] Further, in the construction for pulling out a pile from a series of pile rows driven into the ground as described above, a single auger screw is arranged at a position close to the inner surface of the pile at one end (first) of the pile row. While excavating the ground to a predetermined depth with the casing chuck device arranged on the side corresponding to the pile, the first pile is suspended and pulled out by the chuck device,
Next, the direction of the chuck device is reversed, and a location adjacent to the first excavation site is excavated to a predetermined depth, the second pile is suspended and pulled out by the chuck device, and the same process is repeated thereafter. I have.

[0004]

As described above, in the conventional pile construction, one pile is used for both driving and pulling.
It is necessary to change the direction of the next pile for driving, and to reverse the direction of the chuck device for pulling out, and it requires a lot of labor and time for each work. And there is a problem that the working efficiency is inferior. In particular, when driving the next pile along the previously installed pile, one edge receives both resistance and ground resistance due to engagement with the edge of the previous pile, while the other edge receives The edge of the pile receives only ground resistance, and the load associated with the casting is unbalanced between the two edges, making it difficult to maintain the straightness of the pile. there were.

SUMMARY OF THE INVENTION [0005] In view of the above-mentioned conventional problems, it is an object of the present invention to provide a pile construction machine capable of efficiently driving and pulling out piles and coping with a difference in width of piles to be applied.

[0006]

In order to achieve the above object, a pile construction machine according to a first aspect of the present invention is provided with a leader 1 supported by a machine body M, as indicated by reference numerals in the drawings.
A pair of left and right elevating bodies 2, 2 which can be individually raised and lowered along the reader 1, a swivel bowl 3 attached to each elevating body 2 so as to be horizontally swivelable, and a swivel drive for swiveling the respective swivel bowls 3 Device 4 and auger screw 5 held in each swivel bowl 3
An auger screw rotation driving device 6 for rotationally driving the auger screw 5, a casing 7 externally fitted to each auger screw 5, and a pile suspension chuck device 8 provided on the outer peripheral surface of each casing 7. It is provided with.

According to the pile construction machine having the above construction, two piles P, P can be constructed simultaneously by using two lifting bodies 2, 2 in the pile driving and pulling-out work, and also when necessary. For example, the construction can be performed one by one using only one elevating body 2. Since the auger screw 5 and the casing 7 of each elevating body 2 are held by the horizontally rotatable swivel bowl 3, the pair of auger screws 5, 5 are adjusted by adjusting the degree of opening between the two swivel bowls 3, 3. The mutual interval (inter-center interval) can be set as appropriate according to the width W of the pile P to be applied.

Accordingly, in the simultaneous driving of two piles, a pair of auger screws 5, 5 are arranged at an interval S corresponding to twice the width W of the pile P, and the two piles P, P are chucked in the same direction. At the same time, the two piles P, which are suspended in the ground at the same time and are driven to the predetermined depth while being suspended by the devices 8 and 8, are separated from the end of the previously piled pile P by the interval S. The required number of piles P... Are formed in the same direction in the same direction to form a preceding array with one width W therebetween, and then the two piles P, P are turned in the opposite direction to the previous one. Similarly, by suspending and simultaneously driving the two piles P and P simultaneously so as to complement the gap between the preceding arrangements, a series of pile rows in which the directions are alternately reversed can be formed. Further, in this case, each pile P to be driven receives the ground resistance at both ends at the time of forming the preceding arrangement, and the resistance due to engagement with the piles P, P of the preceding arrangement and the ground resistance at both ends at the next complementary driving. However, in any case, since the loads due to the resistances at both ends are equalized, the straightness of the pile is maintained.

On the other hand, in the simultaneous pull-out operation, a pair of auger screws 5, 5 are arranged at an interval S corresponding to twice the width W of the pile P in the same manner as in the above-mentioned driving, and are driven into the ground. First, piles P in the same direction, which are arranged every other one, are gripped by both chuck devices 8 and 8 from
It is possible to adopt a method of simultaneously pulling out the piles P in the direction in which the piles P in the direction are pulled out simultaneously, and then simultaneously pulling out the remaining piles P in the opposite direction two by two.

According to a second aspect of the present invention, in the pile construction machine of the first aspect, the connecting and detaching means 9 for switching between the connected state in which the pair of elevating bodies 2 are connected and integrated with each other and the non-connected state is provided. It is configured to be provided. In this case, when the two piles P are simultaneously driven and pulled out, the two lifting bodies 2 can be lifted and lowered together.
It is possible to prevent the balance from being lost due to a difference in elevation and a difference in moving speed between the vehicles.

According to the third aspect of the present invention, in the pile construction machine according to the first or second aspect, the swivel bowl 3 is provided with the rotation driving means 70 of the casing 7, so that the pile P can be driven or driven. The direction of the chuck device 8 can be easily changed at the time of pulling out, and the direction of the pile P can be easily changed.

In the invention according to claim 4, the above-mentioned claims 1 to
3, in the pile construction machine, the leader 1
A fixed leader member 10 held by the machine body and one or more movable leader members 11 and 12 connected to the fixed leader member 10 so as to be extendable and contractible,
The telescopic drive means 13 and 14 are interposed between 0 and 12 and the elevating bodies 3 and 3 are supported by the upper movable leader member 12. In this case, the height of the leader can be adjusted according to the length of the pile P to be applied, and the construction speed can be increased by expanding and contracting the leader 1 in parallel with the driving and pulling out of the pile P. The driving force and the pulling-out force can be increased, and the leader 1 can be contracted when the machine is transported to make it compact.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, sheet pile construction as an embodiment of a pile construction machine according to the present invention will be specifically described with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 1 denotes a telescopic reader which is vertically held by a support bowl SA and a back stay BS of a crawler-type movable machine body M, which is directly held by the machine body M. A fixed leader member 10 having a substantially U-shaped cross section, a lower movable leader member 11 having a substantially U-shaped cross section slidably inserted into the fixed leader member 10, and a slidable movable leader member 11 having a lower U shape. And the upper movable leader member 12 having a rectangular cross section fitted inside the
On the front surface of the upper movable leader member 12, two left and right elevating bodies 2, 2 are respectively held so as to be able to ascend and descend.

On the front surface of the upper movable leader member 12 of the reader 1, two racks 13, 13 and two pairs of right and left guide rails 14 arranged on both sides of each rack 13 are provided. All over the length. Each lifting body 2 is mounted on one rack 13 by the lifting drive means 2.
0 and a plurality of pairs of left and right guide rollers 21... Are engaged and rolled with the guide rails 14 on both sides of the rack 13. Guided by 14 and 14 to drive up and down.

As shown in FIG. 3B, one of the two elevating bodies 2, 2 (the right side in the figure) is provided with a connecting / detaching means 9.
A hydraulic cylinder 9a is installed, and a rod 9b of the hydraulic cylinder 9a is extended and operated as shown by an imaginary line in the drawing to engage with a connected portion (not shown) of the other elevating body 2 (right side in the drawing). As a result, the two lifting members 2 and 2 are integrally connected, and conversely, when the rod 9b contracts as shown by the solid line in the drawing, the engagement is released and the two lifting members 2 and 2 are released.
Is set to be in a non-connected state.

A swing bowl 3 constituting a gear case is pivotally mounted at one end side of each lifting body 2 so as to be horizontally swingable, and an auger screw 5 is attached to a free end side of the swing bowl 3 in a hanging manner. The auger screw 5 is provided with a casing 7 surrounding the outer periphery thereof. In addition, a chuck device 8 for suspending the steel sheet pile P on the outer peripheral surface of the casing 7 is provided above the casing 7.

Reference numeral 6 denotes an auger screw rotation driving device, which includes a motor 6a fixed to the pivot end of the revolving bowl 3;
And a gear mechanism 6b in the revolving bowl 3. And, as shown in FIGS. 3A and 3B, the gear mechanism 6b
A driving gear 61 directly connected coaxially with the output shaft of the motor 6a.
And a driven gear 6 coaxially connected to the auger screw 5
2 and an intermediate gear 6 interposed between these two gears 61 and 62.
3 for transmitting the rotation of the motor 6 a to the auger screw 5.

Further, each lifting body 2 is provided with a turning drive device 4 for the turning bowl 3. That is, as shown in FIG. 3 (A), a hollow shaft body 31 is droopingly connected to the lower surface of the revolving bowl 3 on the same axis as the driving gear 61, and the hollow shaft body is mounted on a pedestal portion 2 a of the lifting body 2. Fixed shaft body 22 at a position concentric with 31
The hollow shaft body 31 is fitted to the fixed shaft body 22 via a bearing 23 so as to be relatively rotatable and not detachable in the axial direction, thereby forming a pivot portion of the swivel bowl 3. A worm wheel 4a is provided on the outer peripheral portion of the hollow shaft body 31. A worm 4b meshing with the worm wheel 4a is supported by the lifting / lowering body 2 side, and a motor (shown in FIG. By rotating the worm 4b by the operation of (omitted), the swivel bowl 3 integrated with the hollow shaft body 31 is horizontally rotated through the worm wheel 4a.

The horizontal rotation of the swivel bowl 3 is shown in FIG.
As shown in (B), the free end side is restricted to an angle range of 90 degrees from a posture facing forward to a posture facing outward. Therefore, when the swivel bowls 3, 3 of the two lifting bodies 2, 2 are set to be symmetrical with respect to each other, the distance between the centers of the casings 7, 7 (auger screws 5, 5) of the lifting bodies 2, 2 is set. interval can be arbitrarily set in a range from a minimum of S ₁ to a maximum of S _2.

Further, each swivel bowl 3 is provided with a driving means 70 for rotating the casing 7. That is, as shown in FIG. 3 (A), a cylindrical member 32 is vertically connected to the lower surface of the revolving bowl 3 on the free end side coaxially with the driven gear 62, and the cylindrical member 32 is concentric with the upper end of the casing 7. The cylindrical member 71 connected in the shape is rotatably fitted via a bearing 72 so as to be relatively rotatable and cannot be detached in the axial direction. A worm wheel 70a is provided on an outer peripheral portion of the cylindrical member 32 on the side of the swivel bowl 3, and a worm 70b meshing with the worm wheel 70a is supported by the side of the swivel bowl 3 and provided on the side of the swivel bowl 3. By rotating the worm 70b by operating a motor (not shown), the worm wheel 70
The casing 7 integral with the cylindrical member 71 is rotated via a.

As shown in FIG. 3 (A), the shaft 5a of the auger screw 5 and the shaft 62a of the driven gear 62 connected to the upper end thereof are provided with a central hole 50 communicating with each other. The center hole 50 is provided in the shaft portion 62 of the driven gear 62.
It is connected to a swivel joint 33 attached to the upper end of a. However, when the ground soil to be excavated is hard, the central hole 5 is formed through the swivel joint 33.
Water (or air) to the auger screw 5
Is injected into the excavated soil from the tip of the shaft portion 5a, thereby making it possible to easily excavate the hard soil.

FIG. 4 shows a chuck device 8 for suspending a steel sheet pile. In the chuck device 8, a chuck frame 80 is mounted on the casing 7, a chuck cylinder 81 is pivotally mounted on the chuck frame 80, and a piston rod 81a is provided.
And a pin 82 at the lower end of the chuck frame 80.
The pivot end is pivotally connected to the base end of the swing lever 83 by a pin 84, and a chuck claw 85 is attached to the tip of the swing lever 83. When the piston rod 81a of the chuck cylinder 81 is extended, The swing lever 83 swings clockwise as shown by the imaginary line, and the chuck claw 8 at the tip ends.
5, the steel sheet pile P can be hooked and fixed.

The steel sheet pile P is formed in a groove shape as shown in FIG. 5 by a steel plate, and has an engaging portion H having a substantially U-shaped cross section at both ends. As shown in FIG. 5, a pair of locked bars F, F on both sides are provided in the lower end portion of the steel sheet pile P in a horizontal state.
An L-shaped locking pin 7b protruding downward is locked at the lower end portion of the outer peripheral surface of the outer peripheral surface so as to be disengageable, so that the sheet pile P is securely suspended from the casing 7. .
As shown in FIGS. 3 and 4, each casing 7 has
A plurality of earth discharging holes 7a are formed substantially all over the casing 6, so that the excavated earth and sand can be discharged when the ground is excavated by the auger screw 5.

The leader 1 is of a three-stage telescopic type. As shown in FIG. 7, a fixed leader member 10 and a lower movable leader member 1 are provided.
1 and between the lower movable leader member 11 and the upper movable leader member 12, first and second hydraulic cylinders 15 and 16 are provided as expansion / contraction driving means, respectively. Then, the first hydraulic cylinder 15 is inserted into a hollow portion 11 a provided in the rear thick portion of the lower movable leader member 11, and the distal end of the piston rod 15 a is positioned above the lower movable leader member 11. The base end of the cylinder tube 15 b is pivotally attached to the lower side inside the fixed leader member 10. The second hydraulic cylinder 16 is inserted into the hollow portion 12a of the upper movable leader member 12, and the distal end of the piston rod 16a is connected to the upper movable leader member 1.
2, the base end of the cylinder tube 16 b is pivotally connected to the lower end of the lower movable leader member 11. An installation member 17 is provided below the fixed leader member 10 via a hydraulic cylinder 18, and the height position of the fixed leader member 10 can be adjusted by the cylinder 18.

FIG. 7A shows the upper movable leader member 12.
Is the fixed leader member 10 together with the lower movable leader member 11.
It shows a state of contraction to almost the same height as
The hydraulic cylinder 15 is at the contraction limit position, and the second hydraulic cylinder 16 is at an intermediate position between the contraction limit position and the extension limit position.
From the state of the solid line in FIG.
Is further contracted so that the upper movable leader member 12 slides downward along the lower movable leader member 11, and the upper movable leader member 12 is moved downward as indicated by a virtual line in FIG. The lower end can protrude further below the lower end of the fixed leader member 10 to the underground side.
In this case, the machine main body M is grounded on the ground GL, the sheet pile work location is lower than the ground GL, and the lower end of the upper movable leader member 12 is grounded at the low position.

On the other hand, when the leader 1 causes the first hydraulic cylinder 15 to extend from the solid state in FIG. 7A to the extension limit position, the lower movable leader member 11 and the upper movable leader member 12 are fixed. The reader 1 is slid upward along 10, and the reader 1 is extended as shown in FIG.
Then, when the second hydraulic cylinder 16 is extended from this state, the upper movable leader member 12 slides upward along the lower movable leader member 11, and the leader 1 is extended as shown in FIG. I do. In this case, the leader 1 has the maximum height by extending the first hydraulic cylinder 15 and the second hydraulic cylinder 16 to the extension limit positions. 6A to 6C show general views of the sheet pile construction machine when the height of the leader 1 is low, medium, and high, respectively. However, in FIGS. 6A to 6C, illustration of the casing and the steel sheet pile is omitted.

According to the sheet pile construction machine having the above structure, the work of driving the steel sheet pile P into the ground and the existing sheet pile P
In the pulling work from the ground, two steel sheet piles P, P can be driven and drawn simultaneously using two lifting bodies 2, 2, and if necessary, only one lifting body 2 can be used. Can be used one by one. In the simultaneous construction of two pipes, as described above, the connecting and detaching means 9 is used.
The rod 9b of the hydraulic cylinder 9a is extended (see FIG. 3).
(B)], and if the construction is carried out in a state where the two elevating bodies 2 are integrally connected, it is possible to prevent the imbalance between the two elevating bodies 2 and 2 due to a height difference and a moving speed difference. Can be performed reliably. In addition, the construction of each one is performed by contracting the rod 9b of the hydraulic cylinder 9a,
2 may be performed in a non-connected state.

The width W of the steel sheet pile P is, for example, 40.
Thing different from 0mm, 500mm, 600mm etc.
However, in this sheet pile construction machine, the auger
Swivel bowl in which screw 5 and casing 7 can be horizontally swiveled
3, the degree of opening between the two revolving bowls 3, 3
Adjustment of the two auger screws 5, 5
Depending on the width W of the sheet pile P to which the spacing (center-to-center spacing) is applied
S shown in FIG. ₁To S_TwoCan be set appropriately within the range
You. However, in the case of two simultaneous constructions, FIG.
As described with reference to the above, the interval S is the width of the steel sheet pile P.
It is desirable to set it to be twice as large as W.
According to the sheet pile construction machine of the above, steel sheet piles P with various widths W
Also, the interval S can be set to 2 W without any problem.

First, in the simultaneous driving of the two lifting and lowering bodies 2, 2, the two left and right lifting bodies 2, 2 are integrally connected by a connecting / removing means 9, and the swivel bowls 3, 3 of both lifting and lowering bodies 2, 2 are previously set. By adjusting the degree of opening, the pair of auger screws 5, 5 are arranged at an interval S corresponding to twice the width W of the steel sheet pile P, and the two steel sheet piles P, P are held in the same direction by the chuck devices 8, 8. Hang it. Then, in this suspended state, a pair of auger screws 5, 5 on both sides are arranged at predetermined positions on the ground, and are rotated by the auger screw rotation drive device 6 to excavate the ground, and as shown in FIG. Steel sheet piles P and 8 are simultaneously driven into the ground to a predetermined depth. Thereafter, the auger screws 5, 5 are pulled up to the ground together with the casings 7, 7 while leaving both steel sheet piles P, 8 in the ground.

At this time, since the reader 1 is of a telescopic type,
For driving the steel sheet piles P, P, the lowering drive of the elevating bodies 2 and 2 by the operation of the
With the rotation force of 5, the hydraulic pressure generated by the contraction operation of the reader 1 can be used. That is, when the initial height of the leader 1 is set to be higher than the state shown by the solid line in FIG. 6A due to the length of the steel sheet pile P, FIG. The leader 1 is contracted to the state shown by the solid line. If this contraction operation is performed in parallel with the downward drive of the lifting members 2, 2, the hydraulic pressure of the hydraulic cylinders 15, 16 causes the steel sheet piles P, P to be compressed. The driving force can be increased and the driving speed can be increased. Also, in the above lifting after the driving, the work can be speeded up by extending the reader 1.

After the above-described first and second steel sheet piles P, P are driven, one end of the driven steel sheet piles P, P, that is, from the second steel sheet pile P, along the same row of steel sheet piles. The two auger screws 5, 5 are moved to a position separated by the interval S, and at that position, the third and fourth augers suspended on the casings 7, 7 in the same orientation and at the same interval S as the first and second steel sheet piles P, P. The third steel sheet piles P, P are driven to a predetermined depth in the same manner as described above, and the third and fourth steel sheet piles P, P are left in the ground, and the auger screws 5, 5 are pulled up together with the casings 7, 7 to the ground. Then, the driving of two steel sheet piles P, P is repeated in the same manner, and as shown in FIG.
A preceding array having a width W is formed. This movement of the driving position is performed by the machine body 1 supporting the reader 2. Note that the dotted circle in FIG. 8 indicates a portion that has already been excavated.

When driving of the steel sheet piles P in the preceding arrangement is completed, the direction of the steel sheet piles P suspended in the respective casings 7 is turned by the casing rotation driving means 70 in the opposite direction (180 degrees). In this state, the two auger screws 5, 5 are aligned at the end positions of the preceding arrangement with the unplaced portions between the existing steel sheet piles P, P, and excavation is performed at this position in the same manner as described above. While simultaneously driving two steel sheet piles P, P in the direction opposite to the preceding arrangement to a predetermined depth, the facing ends (engaging portions H) of the driven steel sheet pile P and the existing steel sheet pile P are shown in FIG. Engage each other as shown. Thereafter, the two steel sheet piles P, P suspended in the same manner
Are sequentially complemented from the end of the previously driven steel sheet pile P at a position away from the end of the steel sheet pile P by the distance S, thereby sequentially supplementing the gaps in the preceding row of steel sheet piles P... Alternately invert to form a continuous row of steel sheet piles.

In this case, each steel sheet pile P to be driven receives the ground resistance at both ends at the time of forming the preceding arrangement, and the resistance due to the engagement with the steel sheet piles P, P of the preceding arrangement at both ends at the next complementary driving. In each case, the load due to the resistance at both edges is equalized, so that the straightness of the steel sheet pile is maintained.

As described above, when the direction of the steel sheet piles P suspended from the casings 7 is reversed with respect to the steel sheet piles P in the preceding arrangement, the casing rotation drive as shown in FIG. What is necessary is just to drive the means 70. That is, the worm 70b and the worm wheel 70
By rotating the cylindrical member 71 by 180 degrees from the initial position via a, the casing 7 is turned over and the position of the chuck device 8 is turned in the opposite direction. Can be hung. When the casing 7 is rotated in this manner, the driving operation can be easily performed because the entire driving device need only be moved linearly by the machine main body M during the driving operation.

It is to be noted that the chuck device 8 is kept at a fixed position without rotating the casing 7 as described above, and the whole sheet pile working machine is inverted by the machine main body M. Steel sheet pile P
Can be reversed with respect to the existing steel sheet pile P. Further, in the above-described construction example, the case where a straight steel sheet pile row is formed has been described. However, this sheet pile construction machine is also applicable to a case where a curved steel sheet pile row is formed. When forming a row of curved sheet piles such as arcs, both turning bowls 3 can be turned in the same direction by the turning drive means 4 described above, so that the two steel sheet piles P, P Each time the tool is driven, the turning bowls 3 and 3, that is, the auger screws 5 and 5 are turned by a required angle, thereby facilitating the driving operation. The turning of the casing 7 by the turning driving means 4 is not limited to the case where a curved row of steel sheet piles is formed. Can be effectively used for a driving operation in a place where the machine body M supporting the object cannot move due to an obstacle or the like.

Next, a method for simultaneously extracting two steel sheet piles P from a series of steel sheet piles driven into the ground by the same sheet pile construction machine will be described with reference to FIG. First, the gap between the pair of auger screws 5, 5 is adjusted by adjusting the opening angle of the swivel bowls 3, 3 of the lifting bodies 2, 2 so that the interval between the pair of auger screws 5, 5 is driven into the state shown in FIG. Is set to an interval S corresponding to twice the width W of the steel sheet piles, and every other steel sheet pile row is in the same direction from the left end side in the drawing.
The steel sheet piles P, P are arranged at positions adjacent to the respective inner surface sides thereof, and the chuck devices 8 are arranged on the sides corresponding to the steel sheet piles P, P, respectively.
Excavates the ground to a predetermined depth. The two steel sheet piles P,
After suspending and pulling out P, auger screws 5,5
At the position away from the extracted steel sheet pile position on the front side by the interval S, every other steel sheet pile P, P
The excavation and pulling-out operations are repeated to the right end in the drawing of the row of steel sheet piles in the same direction every other one. Then, in a state where the directions of the chuck devices 8 are reversed, the excavation and pulling-out operations are similarly performed from the right end side in the drawing of the row of the inverted steel sheet piles that are buried every other one and are left side of the row of steel sheet piles. It is sufficient to repeat the process until all the steel sheet piles P are pulled out.

In this drawing operation, in order to reverse the direction of the chuck device 8, the casing 7 is inverted by the above-described casing rotation driving means 70. Also,
The machine main body M supporting the leader 1 may be moved back and forth one side along the row of steel sheet piles. Also, at the time of this pulling, if the telescopic leader 1 is contracted in parallel with the raising and lowering members 2, 2, the hydraulic pressure of the contraction can be used for the pulling force and the pulling speed can be increased. Can be accelerated.

In the above-described driving and pulling-out operations, two steel sheet piles P are driven in and out of the steel sheet pile P at a time. However, the sheet-pile execution machine of the present invention can move up and down two right and left lifting members independently. Even when it is necessary to drive or pull out the steel sheet pile P one by one depending on the construction site, it is possible to cope by driving only one of the elevating bodies 2.

In the sheet pile construction machine of the above embodiment, the lifting / lowering drive device 20 of the rack and pinion type is used for raising / lowering operation of each lifting / lowering body 2. For example, a fixed chain and a lifting / lowering body arranged on the reader 1 side are used. Other types of lifting and lowering drive devices such as those by meshing with the drive sprockets on the two sides may be used, or as a type without lifting and lowering drive device, each lifting and lowering body 2 is mounted on the top of the reader 1 for lifting operation. A configuration suspended by wires can be adopted. In the latter configuration using the lifting operation wire, the driving of the steel sheet pile P may be performed by the gravity of the entire apparatus including the lifting body 2 descending by feeding the wire and the rotational force of the auger screw 5, In that case, an auxiliary press-fitting device may be used.

As the reader 1, besides the illustrated three-stage expansion / contraction system, a two-stage contraction system and a non-contraction type can be adopted. However, from the point of being able to cope with the difference in the length of the steel sheet pile P, and from the advantages of the assisting action and the speed-up due to the parallel shrinkage at the time of driving and drawing the steel sheet pile P,
Telescopic ones are recommended. In addition, although the embodiment of the present invention describes sheet pile construction, the present invention is not limited to sheet piles, and may be employed, for example, as a construction machine such as a multi-axis excavator, a stirrer, or a steel pipe pile. Further, the structure of the elevating body 2, the structure of the rotation driving device 4 and the rotation driving means 70 of the casing, the rotation transmission mechanism of the auger screw rotation driving device 6, the structure of the connecting and detaching means, and the like are variously designed in addition to the embodiment. Can be changed.

[0042]

According to the first aspect of the present invention, a pile construction machine used for driving a pile into the ground or pulling an existing pile from the ground can be individually lifted and lowered along a leader. Since a casing with an auger screw and a chuck device is vertically installed on a horizontally revolving swivel bowl attached to each elevating body,
Two piles can be driven in and pulled out at the same time, so that work efficiency is very good. In addition, piles can be constructed one by one if necessary. In addition, pile widths are different in two simultaneous constructions. Also, there is provided an apparatus which can always set the two hanging intervals to an interval having good work efficiency.

According to the second aspect of the present invention, in the above-described pile construction machine, since the pair of elevating bodies are provided with connection / removal means for switching between a connected state and a non-connected state where they are connected and integrated with each other, Both lifting and lowering bodies can be lifted and unified at the same time during two simultaneous driving and pulling out work, preventing the imbalance between the two lifting and lowering bodies due to height difference and moving speed difference, thus ensuring the safety and reliability of construction Is improved.

According to the third aspect of the present invention, in the above-mentioned pile board construction machine, since the swivel bowl is provided with the driving means for rotating the casing, the direction of the chuck device and the pile at the time of driving or pulling out the pile are set. Can be easily changed, thereby further improving work efficiency.

According to the fourth aspect of the present invention, in the above-described pile construction machine, the telescopic leader is provided, and the pair of elevating bodies are supported by the upper movable leader member. In addition to being able to adjust according to the length of the pile to which the pile is applied, by expanding and contracting the leader in parallel with the driving and pulling of the pile, the construction speed can be increased, and the driving force and the pulling force are increased by the expanding and contracting force. In addition, there is an advantage that the reader can be contracted and compact when transporting the machine.

[Brief description of the drawings]

FIG. 1 is a side view of a sheet pile construction machine according to one embodiment of the present invention.

2A and 2B show a main part of the sheet pile construction machine, wherein FIG. 2A is a front view and FIG. 2B is a cross-sectional view of an auger screw portion.

FIG. 3 shows an elevating body portion of the sheet pile construction machine;
(A) is a vertical side view, and (B) is a cross-sectional plan view.

FIG. 4 is a side view of a chuck device portion in the sheet pile construction machine.

5A and 5B show a casing on which a steel sheet pile is mounted in the sheet pile construction machine, wherein FIG. 5A is a longitudinal sectional side view and FIG. 5B is a transverse sectional view.

FIG. 6 is an overall side view of the sheet pile construction machine without the casing, wherein (A) is the most contracted state of the telescopic reader, (B) is the intermediate telescopic state, and (C) is the most extended state. Are respectively shown.

FIG. 7 is a longitudinal sectional side view showing a telescopic operation state of the telescopic leader in the sheet pile construction machine, where (A) is the most contracted state, (B) is the intermediate telescopic state, and (C) is the most extended state. Each is shown.

FIG. 8 is an explanatory view showing a construction order of a driving method of a steel sheet pile by the sheet pile construction machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leader 2 Elevating body 3 Revolving bowl 4 Revolving driving device 5 Auger screw 6 Auger screw rotating driving device 7 Casing 8 Chuck device 9 Connecting and detaching device 10 Fixed leader member 11 Lower movable leader member 12 Upper movable leader member 13 Rack 14 Guide rail 15 , 16 Hydraulic cylinder (telescopic drive means) M Machine body P Pile (Steel sheet pile) S Spacing between auger screws W Width of steel sheet pile

Claims (4)

[Claims] 1. A reader supported by a machine main body, a pair of left and right elevating members capable of individually ascending and descending along the leader, a swivel bowl attached to each elevating body so as to be horizontally swingable, and each swivel bowl. A swing drive device for swing drive, an auger screw held in each swing bowl, an auger screw rotation drive device for rotating the auger screw, a casing externally fitted to each auger screw, and an outer peripheral surface of each casing A pile construction machine comprising a pile hanging chuck device provided in a yard. 2. The pile construction apparatus according to claim 1, further comprising a connection / removal means for switching between a connected state in which the pair of elevating bodies are connected and integrated with each other and a non-connected state. 3. The pile construction machine according to claim 1, wherein the swivel bowl is provided with a casing rotation drive unit. 4. The leader comprises a fixed leader member held by a machine body, and one or more movable leader members connected to the fixed leader member so as to be extendable and contractible, and extend and contract between the leader members. The pile construction machine according to any one of claims 1 to 3, wherein a driving unit is interposed, and the elevating body is supported by an upper movable leader member.