JP3647788B2 - Initial press-fitting method of steel pile and its initial reaction device and initial reaction stand - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an initial press-fitting method, an initial reaction force device, and an initial reaction force stand used to obtain a reaction force at the time of initial press-fitting of a continuous steel pile such as a steel sheet pile using a static load type pile press-fitting machine. is there.
[0002]
[Prior art]
As a general static load type pile press-in / pull-out machine, a plurality of reaction force gripping devices (clamps) are provided below a pedestal placed on an existing steel pile, and the existing piles are clamped by this reaction force gripping device. In the initial press-fitting of continuous piles such as steel sheet piles, the weight is placed on the reaction force stand provided with the clamp clamping part of the pile press-fitting and pulling machine, and the weight of the reaction force stand and the weight is combined. A method of obtaining a reaction force at the time of press-fitting is common, but further, an initial press-fitting of the first steel sheet pile is performed using a traveling device loaded with a power unit disclosed in Japanese Patent No. 2732242.
[0003]
The initial press-fitting method disclosed in Japanese Patent No. 2732242 is that the arm is fixed in the horizontal state at the lower end of a pair of cylinders standing near the center on the self-propelled device, and the arm can be moved vertically by extending and contracting the cylinder. The reaction unit is mounted on the front side of the cylinder, has an upper plate and a lower plate on both sides, and has a clamp clamping part of a pile press-fit puller at the center. The pair of arms is inserted between the lower plate and the lower plate, and the reaction force platform is pressed against the ground surface by lowering the arms to obtain a reaction force to press-fit the first initial press-fitting pile, and then the arm is lifted and The self-propelling device is moved forward after releasing the pressing force of the force stand, and the second and subsequent initial press-fitting piles are press-fitted.
[0004]
[Problems to be solved by the invention]
However, the above-described method of placing weights on the reaction force frame has a problem that the weights must be removed when the initial press-fitting is completed, and the operation must be temporarily suspended. In the traveling device loaded with the power unit in Japanese Patent No. 2732242, a pair of arms are inserted between the upper plate and the lower plate on both sides of the reaction force frame, and the arms are lowered to press the reaction force frame to the ground. In order to obtain the reaction force of the initial press-fitting, the first steel pile is press-fitted, and then the arm is lifted to release the pressure on the reaction stand, and the self-propelled device is moved forward and moved away. When a reaction force shortage occurs due to press-fitting, there is a problem in that it takes time to put a weight on the reaction force frame again, which is inefficient.
[0005]
Therefore, the present invention solves the above-mentioned problems, and there is no temporary interruption such as removing the weight when the initial press-fitting is completed, and the reaction force shortage is dealt with by the second or subsequent press-fitting at the time of continuous press-fitting of the steel pile. Initial press-fitting method that eliminates the need to place weights on the reaction force frame again, eliminates the need for lifting equipment such as cranes for movement by integrating the pile press-fitting and pulling machine body, power unit, and travel device, and increases steel pile press-in efficiency And an initial reaction force device and an initial reaction force frame.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a power unit disposed on the front side on the traveling device and a reaction force frame disposed on the rear side on the traveling device, and the clamp holding portion of the reaction force frame is clamped. In a static load type pile press-fitting and pulling machine comprising a pile press-fitting and pulling machine main body arranged at the top as a finished state, a pair of left and right lift arms that are driven up and down by upper and lower cylinders are arranged adjacent to the rear position of the power unit and, with firmly clamped immovable reaction force frame from both sides by the lift arm, and more pressing to increase or ground reaction force frame by raising or lowering operation of the lift arms, anti during steel piles initial press-fitting To provide an initial press-fitting method and initial reaction force device for steel piles that can obtain force.
[0007]
In the center of the reaction force stand, a clamp clamping part of the pile press-fitting and pulling machine body is provided, and a front arm that can be opened and closed is attached to the front side of the side member that is integrated with the reaction force stand. A rear arm that can be freely opened and closed is attached to the side.
[0008]
Also, a reaction guide that is driven up or down as a pair of left and right lift arms that are driven up and down by the upper and lower cylinders along the guide rail is mounted adjacent to the rear position of the power unit. And the initial reaction force stand of the steel pile which acquired the reaction force at the time of the initial press injection of a steel pile by being pressed by the ground by the descent drive of a lift arm is provided.
[0009]
According to this initial press-fitting method and its initial reaction force device and initial reaction force stand, when the steel pile is initially press-fitted, the lift arm is lowered by the extension of the upper and lower cylinders to press the reaction force stand against the ground, and the weight of the power unit The first steel pile is press-fitted with the reaction force, and after the press-fitting is completed, the lift arm is released and moved forward by the traveling device, and the front arm of the reaction force stand is extended to extend a pair of left and right After fixing with the lift arm, the second steel pile is press-fitted by the weight of the pile press-fitting and pulling machine body and the reaction force stand and the reaction force of the first steel pile. Thereafter, similar operations are repeated to complete the press-fitting of the third and fourth steel piles.
[0010]
If the reaction force at the time of press-fitting the second and subsequent steel piles is insufficient, the reaction arm is fixed from both the left and right sides by extending the rear arm in the direction of press-fitting as well as the front arm of the reaction arm. Sufficient reaction force can be obtained by pressing the reaction force platform against the ground by the lowering drive of the lift arm that is firmly clamped to the ground. After the initial press-fitting of steel piles is completed in this way, these existing steel piles are used as existing piles, and each existing pile is clamped by the reaction force gripping device of the pile press-fitting and pulling machine main body, and then the built-in movable The side chuck claw can be pushed in the direction of the fixed side chuck claw to chuck the outer periphery of the steel pile for erection, and the steel pile for erection can be continuously press-fitted into the ground by driving the pile press-fitting pull-out cylinder.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, specific embodiments of an initial press-fitting method of a steel pile according to the present invention, an initial reaction force device thereof, and an initial reaction force mount will be described with reference to the drawings. FIG. 1 is a plan view of the initial reaction force device 1, FIG. 2 is a side view thereof, 2 is a traveling device provided with a crawler, and a power unit 3 is arranged on the front F side on the traveling device 2, On the rear R side, a reaction force gantry 4 and a pile press-fitting / pulling machine main body 5 disposed on the upper side in a state where the clamp holding portion 4a of the reaction force gantry 4 is clamped are configured.
[0012]
FIG. 3 is a plan view showing a state in which the pile press-fitting / pulling machine main body 5 is removed from the initial reaction force device 1 of FIG. 1, and FIG. 4 is a line AA when the pile press-fitting / pulling machine main body 5 is set. FIG. As shown in the drawing , guide rails 6 and 6 in the vertical direction are attached adjacent to the rear position of the power unit 3 disposed on the front F side of the traveling device 2, and are driven up and down along the guide rails 6 and 6. A pair of left and right lift arms 7 are provided. Reference numerals 8 and 8 denote upper and lower cylinders for driving the lift arms 7 and 7. The lower ends of the rods of the upper and lower cylinders 8 and 8 are pivotally supported at one end of the traveling device 2 by a lower pin 9, and the head side The upper end portion is pivotally supported by the upper support shaft portion 10 of the lift arms 7 and 7. Therefore, the pair of left and right lift arms 7, 7 can be freely driven up and down by the expansion and contraction of the upper and lower cylinders 8, 8.
[0013]
As shown in FIGS. 3 and 4, the pair of left and right lift arms 7 extend to the rear R side so as to firmly hold both sides of the reaction force stand 4 in an immobile state , and the lift arms 7, 7 are lifted and lowered. The pile press-fitting / pulling machine main body 5 arranged on the upper part of the reaction force gantry 4 can be driven up or down along with the driving.
[0014]
FIG. 5 is a plan view showing the form of the reaction force pedestal, and FIG. 6 is a side view thereof. In the central part of the reaction force gantry 4, the clamp holding portion 4a of the pile press-fitting / pulling machine body 5 is provided along the traveling direction. A front arm 12, 12 that is openable and closable around the fulcrums 11, 11 is attached to the front F side of the side members 15, 15 disposed integrally with the reaction force frame 4. The front arms 12 and 12 are accommodated on the outer surface of the reaction force frame 4 along the side members 15 and 15, and the outer surfaces are always open even when stored and in use. Further, rear arms 14, 14 that are openable and closable around fulcrums 13, 13 are attached to the rear R side of the reaction force rack 4. The rear arms 14 and 14 are accommodated in a direction perpendicular to the traveling direction of the reaction force frame 4. 7 and 8 show a state in which the front arms 12 and 12 and the rear arms 14 and 14 are opened. It is also possible to place separately prepared weights on the front arms 12 and 12 and the rear arms 14 and 14 as conventionally performed.
[0015]
9 is a plan view of the pile press-fitting / pulling machine body 5, FIG. 10 is a side view thereof, and FIG. 11 is a front view thereof, which is a cross-sectional view taken along line BB in FIG. The structure of the pile press-fitting / drawing machine main body 5 itself has been well known. To briefly explain the structure, a reaction force gripping device 21 that clamps an existing steel pile is disposed below the pedestal 20. A slide base 22 is provided on the slide base 22 so as to be slidable along the traveling direction. A support arm 23 is pivotally supported on the slide base 22 so as to be rotatable about the vertical axis. A guide frame 24 that is rotatable about a bearing portion 23a provided in the portion is provided so as to be tiltable. An elevating body 25 is mounted on the guide frame 24 so as to freely move up and down, and is driven up and down by a pair of left and right pile press-in / out cylinders 26 and 26 attached to both sides of the elevating body 25.
[0016]
Below the lifting body 25, a pile gripping device 27 is disposed so as to be rotatable with respect to the lifting body 25. A fixed side chuck claw 27a and a movable side chuck claw 27b are disposed on the inner wall surface of the pile gripping device 27, and the built pile is chucked by the pressing force of the chuck cylinder built in the pile gripping device 27. Press into and withdraw.
[0017]
The actual example of the initial press-fitting method of the steel pile using the initial reaction apparatus by the structure concerning the following is demonstrated. First, when traveling to the work site, the upper and lower cylinders 8 and 8 are contracted to move the pair of left and right lift arms 7 and 7 along the guide rails 6 in the vertical direction to move the reaction force frame 4 in a lifted state. To do. And when performing the initial press-fitting of the steel pile at the site, the lift arms 7 and 7 are driven downward by the extension of the upper and lower cylinders 8 and 8 so that the reaction force frame 4 firmly held by the lift arms 7 and 7 is grounded. 12 and FIG. 13, the reaction force is obtained by the weight of the power unit 3, and the first steel pile 30 is press-fitted.
[0018]
After the press-fitting of the first steel pile 30 is completed, the pressing by the lift arms 7 and 7 is released and then the traveling device 2 moves forward, and as shown in FIGS. 14 and 15, the front arm 12 of the reaction force rack 4 is moved. 16 and press the second steel pile 31 as shown in FIG. 16 by the weight of the pile press-fitting / pulling machine body 5 and the reaction force frame 4 and the reaction force of the first steel pile. Install. Thereafter, similar operations are repeated to complete the press-fitting of the third steel pile 32 and the fourth steel pile 33 shown in FIG.
[0019]
When the reaction force at the time of press-fitting the steel pile after the second steel pile 31 is insufficient at the time of the above operation, the front arms 12 and 12 are press-fitted together with the legs of the rear arms 14 and 14 of the reaction force rack 4. By extending the legs in the advancing direction so that the front arms 12 and 12 of the reaction frame 4 are sandwiched vertically and laterally with a certain amount of play from the left and right sides, the pair of left and right lift arms 7 and 7 are driven downward. A sufficient reaction force can be obtained by pressing the reaction force mount 4 against the ground. Therefore, the reaction force at the time of press-fitting of the second and subsequent steel piles can be ensured by changing the open leg form of the front arm 12 and the rear arm 14 of the reaction force rack 4.
[0020]
After the initial press-fitting of the steel pile is completed as described above, the steel piles 30, 31, 32 are used as the existing piles as shown in FIG. After clamping the pile, the chuck chuck built in the pile gripping device 27 pushes the movable chuck claw 27b in the direction of the fixed chuck claw 27a to chuck the outer periphery of the built-up pile 35. 26 is driven to press fit into the ground. When press-fitting is performed for the stroke of the pile press-in / draw-out cylinders 26, 26, the chuck cylinder is opened and then lifted up by the stroke of the pile press-in / draw-out cylinders 26, 26, and the same operation is repeated again to perform press-fitting to a predetermined depth. The basic operation when the steel pile is pulled out from the ground is substantially the same, and the pile press-in / pull-out cylinders 26 and 26 are driven, and the steel pile is pulled out by the stroke of the pile press-in and pull-out cylinders 26 and 26.
[0021]
【The invention's effect】
As described above in detail, according to the present invention, when the steel pile is initially press-fitted, the pair of left and right lift arms are driven downward, and the reaction arm that is firmly held by the lift arms in a stationary state is pressed against the ground. The reaction force is obtained by the weight of the power unit, and the first steel pile can be press-fitted. After the lift arm is released, the pile is pushed forward by the traveling device, and then the pile press-fitting and pulling machine body and the reaction force stand The second and subsequent steel piles can be continuously press-fitted by the weight of the steel and the reaction force of the first steel pile. Therefore, it is unnecessary to remove the weight when the initial press-fitting is completed as in the conventional method of placing the weight on the reaction force frame, and the efficiency can be improved without temporarily interrupting the work.
[0022]
In addition, even when the reaction force at the time of press-fitting the second and subsequent steel piles is insufficient, the reaction force gantry can be extended by extending the rear arm in the direction of press-fitting along with the opening of the front arm of the reaction force gantry. The reaction force frame can be pressed against the ground by the descent drive of a pair of left and right lift arms that firmly hold the frame from both the left and right sides, and sufficient reaction force can be obtained even if the effort of placing a weight on the reaction force frame is omitted. Can do.
[0023]
Therefore, according to the present invention, there is no temporary interruption in the work such as removing the weight when the initial press-fitting is completed, and it is possible to cope with insufficient reaction force by the second or subsequent press-fitting even during continuous press-fitting of steel piles. The pile press-fitting and pulling machine main unit, power unit, and traveling device are integrated to eliminate the need for lifting equipment such as cranes for movement, enabling construction in tight spaces and improving steel pile press-in efficiency. An initial press-fitting method, an initial reaction force device, and an initial reaction force mount can be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of an initial reaction device to which the present invention is applied.
FIG. 2 is a side view of FIG.
3 is a plan view showing a state in which a pile press-fitting / pulling machine main body is removed from the initial reaction force device of FIG. 1; FIG.
FIG. 4 is a cross-sectional view taken along the line AA when the pile press-fitting and pulling machine main body is set.
FIG. 5 is a plan view showing a form of a reaction force mount.
6 is a side view of FIG. 5. FIG.
FIG. 7 is a plan view showing a form when the reaction force stand is used.
8 is a side view of FIG. 7. FIG.
FIG. 9 is a plan view of a main body of a pile press-fitting and extracting machine.
10 is a side view of FIG. 9. FIG.
11 is a front view of FIG. 9. FIG.
FIG. 12 is a plan view of the initial reaction force device during pile press-fitting.
13 is a side view of FIG.
FIG. 14 is a plan view of an initial reaction force device showing another usage pattern during pile press-fitting.
15 is a side view of FIG.
FIG. 16 is a plan view of the initial reaction force device showing another usage pattern at the time of pile press-fitting.
FIG. 17 is a plan view showing a press-fitted state of the initial pile.
FIG. 18 is a side view showing a form of the pile press-fitting / pulling machine body in use.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Initial reaction force apparatus 2 ... Traveling apparatus 3 ... Power unit 4 ... Reaction force mount 4a ... Clamp clamping part 5 ... Pile press-fit pulling machine main body 6 ... Guide rail 7 ... Lift arm 8 ... Top and bottom cylinder 12 ... Front arm 14 ... Rear part Arm 15 ... Side member 20 ... Base 21 ... Reaction force gripping device 22 ... Slide base 23 ... Support arm 24 ... Guide frame 25 ... Lifting body 26 ... Pile press-fitting cylinder 27 ... Pile gripping device 35 ... Pile pile reference number P3350

Claims (4)

Pile press-in / pull-out provided in the upper part in a state in which a power unit is arranged on the front side on the traveling device and a reaction force frame is arranged on the rear side on the traveling device, and the clamp holding part of the reaction force frame is clamped In the static load type pile press-fitting and drawing machine comprising the machine body,
A pair of left and right lift arms that are driven up and down by upper and lower cylinders are disposed adjacent to the rear position of the power unit, and the lift arm is firmly held in a stationary state from both sides by the lift arms, and the lift arms are raised or lowered. more pressing to increase or ground reaction force frame by a drive, an initial press-fitting method of a steel pile, characterized in that to obtain a reaction force at the time of the steel pile initial press-fitting. Pile press-in / pull-out provided in the upper part in a state in which a power unit is arranged on the front side on the traveling device and a reaction force frame is arranged on the rear side on the traveling device, and the clamp holding part of the reaction force frame is clamped In the static load type pile press-fitting and drawing machine comprising the machine body,
A vertical guide rail is attached adjacent to the rear position of the power unit, and a pair of left and right lift arms that are driven to move up and down by the upper and lower cylinders are provided along the guide rail to firmly fix the reaction force frame from both sides. An initial reaction force device for a steel pile which is sandwiched and driven to move up or down a pile press-fitting and pulling machine main body arranged on an upper portion of a reaction force base as the lift arm is moved up and down. In the center of the reaction force stand, a clamp clamping part of the pile press-fitting and pulling machine body is provided, and a front arm that can be opened and closed is attached to the front side of the side member that is integrated with the reaction force stand. The initial reaction force device for a steel pile according to claim 2, wherein a rear arm that can be freely opened and closed is attached to the side. Pile press-in / pull-out provided in the upper part in a state in which a power unit is arranged on the front side on the traveling device and a reaction force frame is arranged on the rear side on the traveling device, and the clamp holding part of the reaction force frame is clamped In the static load type pile press-fitting and drawing machine comprising the machine body,
A pair of left and right lift arms that are driven up and down by upper and lower cylinders along a guide rail attached adjacent to the rear position of the power unit , and a reaction force stand that is firmly held in an immobile state by the lift arms and driven up or down a is, Ri by that is pressed against the ground with the vertical drive of the lift arms with raising the pile press-drawing machine body with increasing drive of the lift arm, to obtain a reaction force at the time of the steel pile initial press-fitting An initial reaction force stand for steel piles, characterized by doing so.

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