JP2002275892A - Method and device for placing steel pipe pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for placing a steel pipe pile capable of reducing the labor and the time before starting the work to the minimum by providing a rotation preventing function without using a long leader for receiving the rotary reaction force when placing the steel pipe pile. SOLUTION: In this method of placing the steel pipe pile and devices thereof as a basic means, a cylinder 23 provided with a hydraulic excavating machine 24 inside thereof and a slime discharging device 25 for discharging the excavated sediment are connected to each other through a rotation preventing mechanism, and the steel pipe pile 28 supported by a rotation preventing device 29 to prevent the rotation thereof and freely slid in the vertical direction is inserted from under a guide member 25b integrally provided with the slime discharging device 25, and fixed by using a steel pipe pile fixing band 27. Ground is excavated by a down-the-hole hammer 30 fixed to a rod 24a led out downward from the hydraulic excavating machine 24, and the steel pipe pile 28 is placed into the excavated hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a steel pipe pile into the ground by the rotational force of an excavator by the down-the-hole method without using a leader as a rotary reaction force receiver of the excavator. The present invention relates to a method and an apparatus for driving a steel pipe pile, which is provided with a detent mechanism and is driven into the ground.

[0002]

2. Description of the Related Art Generally, when placing a foundation pile or the like, a leader is vertically set by a crawler crane, and an auger machine is mounted on the leader so as to be able to move up and down. In general, a method is employed in which members are suspended and connected, and the excavation shaft member is rotated by an auger machine to excavate the ground. As another construction method, a construction method is known in which a steel pipe pile is built after excavating the ground using an excavator, and a down-the-hole hammer is driven by rotation of an excavator to drive the steel pipe pile into an excavation hole.

FIGS. 15 to 21 show an example of forming a platform on the water surface by a conventional down-the-hole method. First, as shown in FIG. 15, a crawler crane 2 is set on an existing upper ground structure set 1, and FIG. As shown, the lifting operation wire 2 hanging from the tip of the crane boom 2a
A new superstructure 4 is erected using the hook 3 attached to b. Next, as shown in FIG. 17, a leader 5 is erected vertically on the superstructure 4, and by using this leader 5 and a hammer rod 6, a suitable number of conductive material piles 7 are cast and placed, as shown in FIG. 18. Pull out the hammer rod 6. Next, as shown in FIG. 19, the steel pipe piles 8 are erected inside the conductive material piles 7, 7 using the hooks 3, and the mortar is sequentially passed through the injection pipes 9 into the steel pipe piles 8, 8 as shown in FIG. Then, as shown in FIG. 21, the conductor piles 7 are sequentially pulled out using the vibratory hammer 10 to complete the work of placing the steel pipe piles 8,8.

[0004]

However, the conventional method of excavating the ground by rotating an excavating shaft member provided with an excavating bit with an auger machine requires a long leader to receive the rotational reaction force of the auger machine. In addition, large-sized equipment such as a crane is required for loading and unloading the leader to the construction site and moving the leader at the site, and there is a problem that it takes a great deal of time and effort to start work. When excavating the ground on a slope, there is a step between the contact surface of the crawler crane and the contact surface of the leader, so that the leader cannot take a sufficient length, and there is a problem that the excavation depth is limited. . Also, in the case of the conventional down-the-hole method shown in FIGS. 15 to 21, the reader 5 has the same problem because the reader 5 is an essential requirement.

Accordingly, the present invention solves the problem of the conventional method of driving a steel pipe pile, and eliminates the use of a long leader for receiving the rotation reaction force of the auger machine. The method of placing steel pipe piles using the down-the-hole method, which minimizes the labor and time required to start work by eliminating the need for loading and unloading the leader and moving the leader at the site, and its It is intended to provide a device.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cylinder having a hydraulic excavator therein and a slime discharging device for discharging excavated earth and sand through a rotation preventing mechanism. Using a steel pipe pile fixing band which is connected to and inserted through a steel pipe pile which is prevented from rotating by a rotation stopper and is slidably supported in a vertical direction from below a guide member provided integrally with the slime discharging device. A method of setting a steel pipe pile by digging the ground with a down-the-hole hammer fixed to a rod led out from a hydraulic excavator, and setting a steel pipe pile in the obtained drilling hole, and The device is provided as a basic means.

A plurality of keys protrude from the inner wall surface of the cylindrical portion of the slime discharging device, and a key groove protrudes from the outer wall surface of the cylindrical body corresponding to each key. An anti-rotation mechanism of the pile is configured, one end of a pair of fixing tools having an arcuate surface formed on the inner periphery is supported by a pin, and a hydraulic cylinder is provided at the other end, and tightening of the hydraulic cylinder is performed. A steel pipe pile fixing band for fixing the upper end portion of the steel pipe pile to the guide member of the slime discharging device by action is constituted.

[0008] One end of a pair of semicircular fasteners having an arcuate surface formed on the inner periphery is pivotally supported by a pin, and a plurality of guide rollers are arranged at opposing positions of the fasteners. A roller press bolt is provided at the other end of the fastener, and the guide roller is pressed against the surface of the steel pipe pile by the tightening action of the roller press bolt to prevent rotation and slide the steel pipe pile. It constitutes a steel pipe pile rotation stop device that is movably supported. Further, between the cylinder and the slime discharging device, an adjusting cylinder for raising a steel pipe pile fixed to a guide member of the slime discharging device is provided. Further, a rotary joint for supplying high-pressure air to the hydraulic excavator is arranged on the upper closing member of the cylindrical body.

According to the present invention, the steel pipe pile rotation stopper is fixed on the opening of the member through which the steel pipe pile is inserted, and the steel pipe pile is inserted through the steel pipe pile rotation stopper using a crawler crane or the like. Set to. Then, the suspension fitting of the steel pipe pile driving device is suspended, and the cylinder having the hydraulic excavator disposed therein, the slime discharging device, and the rod of the hydraulic excavator projecting below the slime discharging device are connected to the steel pipe pile. Insert in
The steel pipe pile is fixed to the guide member of the slime discharge device by the tightening action of the steel pipe pile fixing band, then the steel pipe pile is raised using the adjusting cylinder, and the steel pipe pile is prevented from rotating using the steel pipe pile rotation stop device. , The down-the-hole hammer connected to the rod expands and strikes the hammer bit, and the excavation of earth and sand proceeds by the rotary excavating action of the hammer bit and the striking action of the down-the-hole hammer.

[0010] Since the steel pipe pile is subjected to the rotation stop processing at the upper and lower portions of the fixing band and the rotation stop device, the function of preventing the rotation of the steel pipe pile during excavation is perfect. After excavation to the planned depth and press-fitting of the steel pipe pile, reverse rotation of the excavator reduces the diameter of the down-the-hole hammer, loosens the steel pipe pile fixing band, loosens the cylinder, slime discharger, and hydraulic excavator By raising the rod, the placing of the steel pipe pile is completed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a method and an apparatus for driving a steel pipe pile according to the present invention will be described below. FIG.
FIG. 1 is a front sectional view of a steel pipe pile driving device 21 used in the present invention. Reference numeral 23 denotes a cylindrical body whose upper end is closed, and a hanging fitting 22 is fixed on an upper closing member 23 a of the cylindrical body 23. Have been. A hydraulic excavator 24 is provided inside the cylindrical body 23. Reference numeral 25 denotes a slime discharging device. The lower end of the cylindrical body 23 is inserted into a cylindrical portion 25a of the slime discharging device 25 so as to be slidable up and down.
A rod 24a led downward from 4 projects downward from the cylindrical body 23 through the inside of the slime discharging device 25. 25b is a guide member integrated with the slime discharging device 25, 25d is a slime discharging port, and 26 and 26 are adjustment cylinders disposed between the cylindrical body 23 and the slime discharging device 25.

Reference numeral 27 denotes a steel pipe pile fixing band, reference numeral 28 denotes a steel pipe pile to be cast, reference numeral 29 denotes a steel pipe pile rotation stopping device, reference numeral 30 denotes an expanded down-the-hole hammer, and reference numeral 31 denotes a hammer bit for earth and sand excavation made of cemented carbide. The upper end portion of the steel pipe pile 28 is inserted into the guide member 25b, and is fixed by the steel pipe pile fixing band 27.

FIG. 2 is an enlarged view of the upper part of FIG.
A rotary joint 32 for air is arranged on the upper closing member 23a of 3 so that high-pressure air can be supplied to the hydraulic excavator 24. The cylindrical body 23 is divided into two parts in the middle, and is configured to be disassembled by flanges 23b and 23c and fasteners 23d and 23d such as bolts and nuts. As shown in FIG. 3 which is a cross-sectional view taken along the line AA in FIG. 2, four keys 33, 33 are protruded from the inner wall surface of the cylindrical portion 25a of the slime discharging device 25.
On the outer wall surface of the cylindrical body 23 corresponding to
34 are protruded. The key 33 and the key groove 34 constitute a rotation stopping mechanism of the steel pipe pile 28.

FIG. 4 is a plan view showing the steel pipe pile fixing band 27 taken out. One end of a pair of fixing members 27b, 27b having arcuate surfaces 27a, 27a formed on the inner periphery is a pin 35.
A hydraulic cylinder 37 is provided at the other end, and a fixture 27 is provided in a notch 25c formed in the guide member 25b of the slime discharging device 25 shown in FIG.
b and 27b are inserted, and the upper end portion of the steel pipe pile 28 is fixed to the guide member 25b by the tightening action of the hydraulic cylinder 37.

FIG. 5 is an enlarged view of the lower part of FIG. 1, wherein 41 is a main girder of a platform or the like to be constructed, 42 is a receiving girder,
The main girder 41 and the receiving girder 42 constitute a superstructure 43. An opening 43a formed at a predetermined position of the superstructure 43
A lower plate 29a of the steel pipe pile detent device 29 is fixed to an upper surface of the steel plate by bolts, and the steel pipe pile detent device 29 is supported between the lower plate 29a and the upper plate 29b. 43b is a steel pipe guide integrally formed with the steel pipe pile rotation stopping device 29.

FIG. 6 is a plan view showing the steel pipe pile rotation stopping device 29 taken out, and one end of a pair of semicircular fasteners 46, 46 having arcuate surfaces 45, 45 formed on the inner periphery, is a pin. 47
At the position where the fasteners 46 and 46 are opposed to each other.
The plurality of guide rollers 48 are arranged. A roller press bolt 49 is provided at the other end of the fasteners 46, 46, and the steel pipe pile 2 on which the guide rollers 48, 48 are driven by tightening the roller press bolt 49.
The steel pipe pile 28 is supported so as to be slidable in the vertical direction by the rotation of the guide rollers 48, 48 by being pressed against the surface of the steel pipe 8.

FIGS. 7 to 14 are schematic process diagrams showing an actual operation procedure when driving a steel pipe pile for constructing a platform by a down-the-hole hammer method by applying the present invention, and have been described with reference to FIGS. The same components in the conventional down-the-hole hammer method are denoted by the same reference numerals. First, as shown in FIG. 7, the crawler crane 2 is set on the existing superstructure set 1, and a new superstructure 43 is formed by using the hook 3 attached to the lifting operation wire 2b hanging from the tip of the crane boom 2a. Erect and PC
The attitude of the superstructure 43 is maintained by the steel wire 50. The steel pipe pile rotation stop device 29 is previously placed on the opening 43a of the superstructure 43.
The lower plate 29a of the steel pipe pile rotation stopping device 29 is fixed to the main girder 41 of the superstructure 43 with bolts as described in the enlarged view of the main part of FIG. 5, and the upper plate 29b and the lower plate are fixed. 2
9a, the steel pipe pile rotation stopping device 29 is supported.

Next, as shown in FIG. 8, the steel pipe pile 28 is set by using the hook 3 of the crawler crane 2 so as to pass through the inside of the steel pipe pile rotation stopping device 29. Next, as shown in FIG. 9, using the hook 3,
2 with a hydraulic excavator 24 provided inside
3, slime discharging device 25 and slime discharging device 25
Rod 24a of the hydraulic excavator 24 projecting downward
Is inserted into the steel pipe pile 28. As described in the enlarged view of the main part of FIG. 5, the down-hole hammer 30 and the hammer bit 31 for earth and sand digging are attached to the lower side of the rod 24a of the hydraulic excavator 24.

Next, as shown in FIG. 10, the steel pipe pile 28 is removed from the slime discharging device 2 by the tightening action of the steel pipe pile fixing band 27.
5 is fixed to the guide member 25b. As described with reference to FIG. 4, a pair of fixtures 27b, 27b having arcuate surfaces 27a, 27a formed on the inner periphery of the steel pipe pile fixing band 27 are inserted into the cutouts 25c formed in the guide member 25b. Then, the upper end portion of the steel pipe pile 28 is fixed to the guide member 25b by the tightening action of the hydraulic cylinder 37. While maintaining this state, the steel pipe pile 28 is raised using the adjusting cylinders 26, 26.

Next, as shown in FIG. 11, the rotation of the steel pipe pile 28 is prevented by using the steel pipe pile rotation stopping device 29, and then the driving of the hydraulic excavator 24 is started. Steel pipe pile detent device 29
As described with reference to FIG. 6, by tightening the roller pressing bolt 49 provided at the other end of the pair of semicircular fasteners 46 having the arcuate surfaces 45 formed on the inner periphery thereof, The rotation of the steel pipe pile 28 is prevented by the guide rollers 48, 48, and the steel pipe pile 28 is slidable in the vertical direction by the rotation of the guide rollers 48, 48.

As shown in FIG. 3, the steel pipe pile 28 has keys 33, 33 protruding from the inner wall surface of the cylindrical portion 25a of the slime discharging device 25 and protruding from the outer wall surface of the cylindrical body 23. Since the rotation is prevented by the rotation preventing mechanism by the key grooves 34, 34, the rotation stopping function is performed at two upper and lower positions by the action of the steel pipe pile rotation stopping device 29.

As shown in FIG. 12, the down-the-hole hammer 30 connected to the rod 24a is expanded by the forward rotation of the hydraulic excavator 24, and the down-the-hole hammer 30
The hammer bit 31 made of cemented carbide is hit by the operation of the above, and the excavation of the earth and sand proceeds by the rotary excavating action of the hammer bit 31 and the hitting action of the down-the-hole hammer 30. At the time of excavation, the hydraulic excavator 2 is moved from the air rotary joint 32 disposed on the upper closing member 23a of the cylinder 23.
By supplying high-pressure air to 4, the excavated earth and sand rises through the gap between the steel pipe pile 28 and the rod 24 a and is sequentially discharged from the slime discharge port 25 d of the slime discharge device 25.

The hydraulic excavator 2 excavates to a predetermined depth and press-fits the steel pipe pile 28 before the hydraulic excavator 2
Since the diameter of the down-the-hole hammer 30 is reduced by reversely rotating the cylinder 4, the steel pipe pile fixing band 27 is loosened here, and then, as shown in FIG. By raising and raising the rod 24a of the hydraulic excavator 24, the placing of one steel pipe pile 28 is completed. If necessary, cement milk and mortar can be injected into the steel pipe pile 28 through an injection pipe.

Next, simultaneously with the loosening of the roller pressing bolt 49 of the steel pipe pile rotation stopping device 29, the fastener 23 of the cylindrical body 23 is simultaneously tightened.
d, 23d are loosened, the flanges 23b, 23c are disassembled, and the cylindrical body 23, the slime discharging device 25 and the hydraulic excavator 24 are removed.
The rod 24a is removed, and as shown in FIG. 14, the steel pipe is placed on the opening 43a of the new superstructure 43 using the hook 3 attached to the lifting operation wire 2b hanging down from the tip of the crane boom 2a of the crawler crane 2 again. The pile rotation stopping device 29 is fixed and returned to the state of FIG.
Continue the casting work of 8.

As described above, according to the present invention, the cylindrical body 23 in which the hydraulic excavator 24 is provided, the slime discharging device 25, and the rod of the hydraulic excavator projecting below the slime discharging device 25. 24a is inserted into the steel pipe pile 28, and the steel pipe pile 2 is
8 is fixed to the guide member 25b of the slime discharging device 25, the steel pipe pile 28 is raised using the adjusting cylinder 26, and the rotation of the steel pipe pile 28 is prevented using the steel pipe pile rotation stopping device 29, and then hydraulic excavation is performed. When the driving of the machine 24 is started, the down-the-hole hammer 30 connected to the rod 24a expands and strikes the hammer bit 31 to excavate earth and sand by the rotary excavating action of the hammer bit and the impact action of the down-the-hole hammer. Can be. When the hydraulic excavator 24 is rotated in the reverse direction after the steel pipe pile 28 is pressed into the predetermined depth and the steel pipe pile 28 is press-fitted, the down-the-hole hammer 30 is reduced in diameter, the steel pipe pile fixing band 27 is loosened, and the cylinder 23 and the slime are discharged. The installation of the steel pipe pile can be completed by raising the device 25 and the rod 24a of the hydraulic excavator.

[0026]

As described above in detail, according to the method and the apparatus for setting a steel pipe pile according to the present invention, the ground is excavated by rotating the excavation shaft member provided with the conventional excavation bit by the auger machine. A long leader is not required to receive the rotation reaction force of the auger machine as in the construction method, and large equipment such as a crane for loading and unloading the leader to the construction site and moving the leader on the site is required. In addition, it is possible to minimize the time required for starting the work and to shorten the pre-processing time.

Further, since the steel pipe piles are subjected to rotation stop processing at two upper and lower locations of an upper fixed band and a lower rotation stop device, the function of preventing rotation of the steel pipe piles during excavation is thorough.
In addition, even when excavating the ground on a slope, there is an advantage that there is no step that easily occurs with a ground contact surface when a leader is used, and there is no problem that the excavation depth is limited, and the steel pipe pile using the down-the-hole method is used. The present invention is very effective when applied to the method and apparatus for casting.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a steel pipe pile driving device used in the present invention.

FIG. 2 is an enlarged view of the upper part of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view showing the steel pipe pile fixing band.

FIG. 5 is an enlarged view of a lower part of FIG. 1;

FIG. 6 is a plan view showing the steel pipe pile rotation stopper.

FIG. 7 is a schematic diagram showing an actual operation procedure at the time of placing a steel pipe pile.

FIG. 8 is a schematic diagram showing the next work procedure from FIG. 7;

FIG. 9 is a schematic diagram showing the next work procedure from FIG. 8;

FIG. 10 is a schematic diagram showing the next work procedure from FIG. 9;

FIG. 11 is a schematic diagram showing the next work procedure from FIG. 10;

FIG. 12 is a schematic view showing the next work procedure from FIG. 11;

FIG. 13 is a schematic diagram showing the next work procedure from FIG. 12;

FIG. 14 is a schematic view showing the next work procedure from FIG. 13;

FIG. 15 is a schematic view showing a work procedure when a conventional steel pipe pile is driven.

FIG. 16 is a schematic view showing the next work procedure from FIG. 15;

FIG. 17 is a schematic view showing the next work procedure from FIG. 16;

FIG. 18 is a schematic view showing the next work procedure from FIG. 17;

FIG. 19 is a schematic view showing the next work procedure from FIG. 18;

FIG. 20 is a schematic diagram showing the next work procedure from FIG. 19;

FIG. 21 is a schematic diagram showing a next work procedure from FIG. 20;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Steel pipe pile setting apparatus 22 ... Hanging metal fitting 23 ... Cylindrical body 23a ... Closure member 24 ... Hydraulic excavator 24a ... Rod 25 ... Slime discharge device 25a ... Cylindrical part 25b ... Guide member 25c ... Notch part 26 ... Adjustment cylinder 27 ... steel pipe pile fixing band 28 ... steel pipe pile 29 ... steel pipe pile rotation stop device 30 ... down the hole hammer 31 ... hammer bit 32 ... rotary joint for air 33 ... key 34 ... key groove 37 ... hydraulic cylinder 43 ... superstructure 43b ... steel pipe guide 48: Guide roller 49: Roller crimping bolt 50: PC steel wire Reference number P3265

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D041 AA02 BA44 CA01 CB06 DB02 FA03 2D050 AA06 CA02 CB09 CB10 CB14 CB22 CB42 EE04 EE14

Claims (8)

[Claims] A slime discharging device for discharging excavated earth and sand is connected via a rotation preventing mechanism to a cylinder body provided with a hydraulic excavator therein, and a guide member provided integrally with the slime discharging device. From below, a steel pipe pile that is prevented from rotating by a rotation stop device and that is slidably supported in the vertical direction is inserted and fixed using a steel pipe pile fixing band, and a rod that is led downward from the hydraulic excavator Excavating the ground with a down-the-hole hammer fixed to the hole, and placing a steel pipe pile into the obtained excavation hole. 2. A steel pipe pile rotation stopping device is fixed on an opening of a member into which a steel pipe pile is inserted, and a cylinder body provided with a hydraulic excavator therein and a slime discharge device for discharging excavated earth and sand are provided. Connected via a rotation preventing mechanism, a steel pipe pile, which is prevented from rotating by the rotation stopping device and supported vertically slidably from below a guide member provided integrally with the slime discharging device, is inserted therethrough. Using a steel pipe pile fixing band, fix the steel pipe pile and the guide member of the slime discharging device,
The steel pipe pile is raised by an adjusting cylinder disposed between the cylinder and the slime discharge device, and the ground is excavated by a down-the-hole hammer fixed to a rod led downward from a hydraulic excavator, and the obtained excavation hole is obtained. A method for driving a steel pipe pile into a steel pipe pile. 3. A cylinder body provided with a hydraulic excavator therein, a slime discharging device connected to the cylinder body via a rotation preventing mechanism, and a guide member integrally provided below the slime discharging device. And a steel pipe pile rotation stop device in which the steel pipe pile is prevented from rotating and the steel pipe pile is slidably inserted in the vertical direction, and a steel pipe pile fixing band for fixing the upper end portion of the steel pipe pile to the guide member of the slime discharging device. And a down-the-hole hammer for excavating ground excavated from a hydraulic excavator through a slime discharging device, and a hammer fixed to the rod. 4. A plurality of keys protruding from an inner wall surface of a cylindrical portion of a slime discharging device, and a key groove is protruding from an outer wall surface of a cylindrical body corresponding to each key. 4. The steel pipe pile driving device according to claim 3, wherein the steel pipe pile rotation preventing mechanism is configured. 5. A pair of fixtures having an arcuate surface formed on the inner periphery thereof are pivotally supported at one end by a pin, and a hydraulic cylinder is provided at the other end. The steel pipe pile setting device according to claim 3 or 4, wherein a steel pipe pile fixing band for fixing an upper end portion of the steel pipe to a guide member of the slime discharging device is configured. 6. One end of a pair of semicircular fasteners having an arcuate surface formed on the inner periphery thereof is pivotally supported by a pin, and a plurality of guide rollers are arranged at opposing positions of the fasteners. A roller press bolt is provided at the other end of the fastener, and the guide roller is pressed against the surface of the steel pipe pile by the tightening action of the roller press bolt to prevent rotation and slide the steel pipe pile. 6. A steel pipe pile anti-rotation device which is movably supported.
3. The steel pipe pile driving device according to claim 1. 7. An adjusting cylinder for raising a steel pipe pile fixed to a guide member of the slime discharging device is provided between the cylinder and the slime discharging device.
3. The steel pipe pile driving device according to claim 1. 8. The steel pipe pile driving device according to claim 3, wherein a rotary joint for supplying high-pressure air to a hydraulic excavator is arranged on the upper closing member of the cylindrical body.