JPH07127060A - Pile pressing-in machine and pile pressing-in and drawing-out construction method - Google Patents

Abstract

PURPOSE:To increase workability by flexibly using an ordinary static load type pressing construction method, an auger preceding digging construction method at increased load, and an auger and pressing construction method in which auger is always moved preceedingly and operated simultaneously together with pressing. CONSTITUTION:An existing pile 1 is clamped by an existing pile clamp 3, and a casing 13 and an erecting pile 2 are chucked by a pile chucking device 8. Next, while rotating an earth auger excavator 16 forward, the casing 13 and pile 2 are pressed simultaneously into the ground by the action of a pile pressing in and out cylinder 7. In this case, if the ground is hard, the excavator 16 only will be rotated forward for digging to reduce pressing resistance. Also when a soil pressure, etc., at the top part is required after the pile 2 has been pressed in, the excavator 16 is rotated reversely to raise the casing 13, and the pile 2 is moved forward. Then, when a mast 6 is self-run, it is self-run to a specified position by a slide base 5, etc., after the clamp 3 has been opened, and the clamp 3 is re-clamped. Thus the work method can be altered, and the work can be made in a restricted place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled pile press-fitting / pulling machine and a pile press-fitting / pulling-out method. The present invention relates to a device and a construction method.

[0002]

2. Description of the Related Art A pile press-fitting method using a static load type pile press-fitting / extracting machine that has been widely used in the past uses a pile press-fitting / extracting cylinder to take a pile of steel sheet piles into the ground while taking a reaction force from an existing pile. It is a press-in and pull-out construction method, and is widely used as a pollution-free device with reduced noise. Further, there is also known a method of using a static load type pile press-in / pull-out machine together with an earth auger to perform press-in / pull-out of a pile on a hard ground.

[0003] In such an apparatus, it is usual that the pile is press-fitted in order to firmly press the pile into the ground, and then the earth auger is dug into the pile, but it is difficult to press-fit the pile. In this case, it is desirable to adopt a method of facilitating press-fitting of the pile by excavating this hard portion first with an earth auger.

Regarding the above, JP-A-60-112925
In the gazette, a clamp for grabbing piles that are built side by side in the ground and a clamp that is arranged adjacent to the clamp and is vertically driven relative to the clamp and has a pile build-up pitch in the pile parallel direction or more. A chuck that can be driven relative to one another is provided, the chuck including a casing of the earth auger and a pile of the earth auger, gripping the casing from both sides, and a movable gripping member that cooperates with the movable gripping member. Fixed to the casing of the earth auger, and
A pile press-fitting machine configuration is disclosed which comprises a fixed gripping member for gripping a longitudinally extending lug thereof.

According to such a pile press-fitting machine, it is possible to advance the earth auger excavation and pile press-fitting prior to the pile press-fitting advance, or to change from the earth auger excavation advancement to the pile press-fitting advance, as required. Pile press-fitting work can be performed according to the conditions.

[0006]

However, the pile press-in construction method using such a conventional static load type pile press-in / pull-out machine is compared with the case where a long pile is press-fitted, the ground is reinforced, earth charcoal, etc. In the case of mechanical rigidity, a large base machine equipped with a tower supporting three points is required, so it is required to take up a large space on the work site, and the large tower also intimidates residents and passersby in the vicinity of the work site. There is a problem that it gives a feeling, and there is a further difficulty that construction on hard ground such as earth charcoal is difficult.

Further, in the pile press-fitting method described in Japanese Patent Laid-Open No. 60-112925, it is possible to press the pile into a relatively hard ground by using an earth auger together, but the head at the tip of the auger screw is used. Since the diameter cannot be made larger than the outer diameter of the casing, there is a limit to the excavation performance, and because the fixed gripping member is along the outer diameter of the casing, it may be possible to weld or transport the casing on site. There is a problem in that the positional relationship between the fixed grip member and the casing may be distorted due to the strain deformation, and the built-in pile may not enter the chuck portion of the fixed grip member.

Therefore, the present invention solves the problems of the conventional pile press-fitting machine, does not require a large space at the work site, and further enhances the excavation performance of the earth auger to perform the pile press-fitting and withdrawing. An object of the present invention is to provide a pile press-fitting machine and a pile press-fitting / pulling-out method in which workability at the time is improved.

[0009]

In order to achieve the above object, the present invention provides a base fixed on an existing pile by an existing pile clamp, a slide base on the upper surface of the base which is movable back and forth, A mast as a pile press-in / pull-out machine main body that is erected above the slide base, a pile press-in / pull-out cylinder and an elevating / lowering body that are vertically arranged on the side of the mast, and a swivel below the elevating / lowering body. A pile press-fitting machine provided with a pile gripping device arranged and a casing for an earth auger chucked by the pile gripping device, and a mechanism for chucking the casing and the sheet pile at the same time or only the casing by the pile gripping device. And a pile press-fitting method.

In the casing, a rotation stopping member for rotating the earth auger when the pile gripping device is opened is provided in a protruding manner, and a notch corresponding to the rotation stopping member is formed in the pile gripping device. Has a stroke that is at least twice the pitch of the piles, and it is possible to press fit two piles in the direction of advance from the existing piles in which the mast and the pile gripping device are clamped. Further, a casing receiving chuck claw, a casing receiving side chuck cylinder, a built-in pile chuck claw and a built-in pile chuck cylinder are provided inside the pile gripping device, and when the built-in pile chuck claw is opened, the casing outer diameter and the casing are An appropriate space is provided between it and the receiving chuck claw.

Further, a built-in pile pressing chuck for preventing the casing from falling when inserting the casing into the pile gripping device is provided above the abutting portion of the casing with the built-in pile pressing chuck, and above the built-in pile pressing chuck. An earth auger leader is formed integrally with the casing, and the earth auger machine is arranged on the side of the earth auger leader so as to be able to move up and down.

[0012]

[Operation] According to the pile press-fitting machine and the pile press-fitting / extracting method, the pile gripping device is used to press the earth auger casing and the pile at the same time, or only the casing is chucked, so that the static-force type press-fitting / extracting machine is used. In addition, the auger can be advanced in advance when the load increases, and the auger can be used together with the auger to press the auger at the same time as the press-fitting / extractor press-fitting. The notch corresponding to the stop member has the effect of enabling the casing and the auger screw to move up and down regardless of the position of the built-in pile.

Further, since an appropriate space is provided between the casing outer diameter and the casing receiving chuck jaws when the built-in pile chuck jaws are opened, it is possible to use an auger head larger than the casing outer diameter, and the earth auger is used. It is possible to reduce the resistance at the tip of the casing even in the press-fitting work that is performed together. Since the pile press-in / pull-out machine itself can be moved by itself, it can be installed only by the pile loading crane, and the intimidation of residents and passersby is reduced without being restricted by the work place.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a pile press-fitting machine and a pile press-fitting / pulling-out method according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the configuration of the present embodiment. In the figure, reference numeral 4 is a base fixed on the existing pile 1, and existing pile clamps 3, 3 are provided below the base 4. .

A slide base 5 is provided on the upper surface of the base 4 so as to be movable back and forth with respect to the traveling direction. Above the slide base 5, a mast 6 as a pile press-in / pull-out machine main body is provided.
Is erected. A pile press-in / pull-out cylinder 7 and an elevating / lowering body 20 are arranged on the side of the mast 6 so as to be able to move up and down, and a pile gripping device 8 is pivotally arranged below the elevating / lowering body 20. .

The slide base 5 provided on the upper surface of the base 4 is constructed so as to have a stroke that is at least twice the pitch of the piles built up, whereby the mast 6 and the pile gripping device 8 are installed on the existing piles. Two built-in piles can be press-fitted in the traveling direction from the existing pile 1 clamped by the clamps 3, 3. 2 is a built-in pile.

FIG. 2 is a cross-sectional view of the pile gripping device 8, wherein 13 is a casing for the earth auger, 9 is a casing receiving chuck claw, 10 is a casing receiving side chuck cylinder, 11 is a built-in pile chuck claw, and 12 is a built-in pile chuck claw. Is a built-in pile chuck cylinder, and when the built-in pile chuck claw 11 is opened, an appropriate space α is provided between the casing receiving chuck claw 9 and the casing outer diameter in the circumferential direction of the casing 13. As will be described later, the casing 13 and the built-in pile 2 can be driven in or pulled out by the pile gripping device 8.

On the other hand, above the abutting portion of the casing 13 with the built-in pile 2, a built-in pile holding chuck 19 for preventing the casing 13 from falling when the casing 13 is inserted into the pile gripping device 8 is provided. Further, an earth auger reader 15 is integrally formed with the casing 13 above the built-in pile pressing chuck 19, and an earth auger excavator 16 is arranged on the side of the earth auger reader 15 so as to be able to move up and down. There is. 1
7 is an auger screw and 18 is an auger head.

The casing 13 has a rotation stopping member 1 for rotating the earth auger machine 16 when the pile gripping device is opened.
4 and 14 are provided in a protruding manner, and the pile gripping device 8 is formed with a cutout portion 8a corresponding to the rotation stopping members 14 and 14.

According to this structure, first, the existing pile 1 is clamped by the existing pile clamps 3 and 3, and the casing 13 and the built-in pile 2 are chucked by using the pile gripping device 8 to be constructed by the action of the press-fitting / extracting cylinder 7. Perform press-fitting or pulling-out work of the pile 2. At this time, a stable posture during work can be obtained by taking a reaction force by the existing pile clamps 3 and 3.

In the above operation, when the pile is press-fitted, the casing 1
3 is in contact with the built-in pile 2, and is held by the casing receiving chuck claw 9 and the built-in pile chuck claw 11. The casing receiving chuck claw 9 and the built-in pile chuck claw 11 are opened and closed by the casing receiving side chuck cylinder 10 and the built-in pile chuck cylinder 12, and the casing receiving chuck claw 9 and the built-in pile chuck claw 11 are opened. And the space α provided between the casing receiving chuck claw 9 and the casing.

On the other hand, the clamp positions of the existing pile clamps 3 and 3 must be sequentially changed in the advancing direction during the progress of the work, but the existing pile clamps 3 and 3 can slide at right angles to the advancing direction. It is configured as
With this, the clamp position of the existing pile can be changed.

To move the pile press-in / pull-out machine main body by itself, the existing pile clamps 3, 3 are released during the press-fitting of the second pile, and the base 4 is raised by the action of the pile press-in / pull-out cylinder 7 to slide the slide base. Return 5 to the first position. Along with this, the base 4 and the existing pile clamps 3, 3 are moved forward by one pitch in the traveling direction. Next, the existing pile clamps 3, 3 are changed to the meshing position of the existing pile 1, and then the base 4 is lowered. As a result, the press-fitting / pulling-out machine main body can be moved by itself, and the press-fitting work of the pile can be continued by sequentially moving by itself.

The earth auger machine 16 can be lowered by its own weight by forward excavation of the auger screw 16, and the auger screw 16 can be pulled up while the auger screw 16 is reversed and soil is removed. When it is impossible to pull up due to lack of soil discharge, the crane may be used to supplementally lift the auger machine 16.

The specific work steps will be described below. First, as an assembling procedure of the built-in pile, as shown in FIG. 3, the earth auger machine 16 is provided by the hook 25 suspended from the wire of the crane 24 provided in the crane work vehicle 23.
To vertically support the casing 13. Next, the built-in pile 2 is pulled up using the auxiliary winding wire 26 of the crane 24. At this time, the metal fittings 21 fixed to the lower part of the casing 13 are attached to the fasteners 2 fixed to the lower part of the built-in pile 2.
Hook two.

The built-in pile 2 thus pulled up is chucked by the built-in pile holding chuck 19. Then, as shown in FIG. 4, the casing 13 is inserted into the pile gripping device 8 by a crane, and firmly chucked by using the casing receiving chuck claw 9 and the built-in pile chuck claw 11 (see FIG. 2).

Next, as shown in FIG. 5, the casing 13 and the built-in pile 2 are simultaneously pressed into the ground by the action of the pile press-in / pull-out cylinder 7 while the earth auger machine 16 is rotated in the normal direction. At this time, if the ground is hard, as shown in FIG. 6, only the earth auger machine 16 is forwardly excavated to reduce the press-fitting resistance.

Next, as shown in FIG. 7, when the press-fitting stroke is completed, the pile gripping device 8 is opened, and the pile gripping device 8 is moved up by the action of the pile press-fitting / extracting cylinder 7. Then, the built-in pile 2 is press-fitted to a predetermined depth by repeating the steps shown in FIGS.

Further, as shown in FIG. 8, when draining or earth pressure at the tip of the built-in pile 2 when the press-fitting of the built-in pile 2 is completed, the preceding excavation by the earth auger machine 16 is stopped and the built-in pile 2 is stopped.
Precede. This work decides the advance depth beforehand,
When the earth auger machine 16 is reversed after the pile gripping device 8 is opened, the casing 13 rises due to the earth discharging force. By this operation, the leading position of the built-in pile 2 can be secured.

Next, as shown in FIG. 9, the pile gripping device 8 press-fits the upper end of the built-in pile 2 to a predetermined height to complete the press-fitting operation.

The self-propelled process of the pile press-fitting / pulling machine main body will be described below. First, as shown in FIG. 10, after the first press-fitting of the built-in pile 2 is completed, the clamps 3, 3 of the existing pile 1 are released during the press-fitting of the second built-in pile 2. Then, as shown in FIG. 11, the base 4 of the pile press-in / pull-out machine main body is lifted to make the existing pile clamps 3, 3 float above the upper ends of the existing piles 1.

Next, as shown in FIG. 12, by the action of the slide base 5, the mast 6 is retracted along the existing pile 1 and the base 4 is moved in the traveling direction, so that the existing pile clamps 3 and 3 are attached to the existing pile 1. Align with the mating position.

Then, as shown in FIG. 13, the base 4 is lowered by the action of the pile press-in / pull-out cylinder 7 of the main body of the pile press-in / pull-out machine, and then the existing pile 1 is re-chucked by the existing pile clamps 3 and 3. Self-run is completed.

[0034]

As described in detail above, according to the pile press-fitting machine and the pile press-fitting / pulling-out method according to the present invention, the pile gripping device simultaneously chucks the casing and the pile of the earth auger or only the casing. By doing so, it is possible to use the press-fitting construction method with the static load type press-fitting / extracting machine, and also the method of advance-digging the auger when the load increases, and the construction of the press-fitting / extracting machine with the auger preceding it at the same time It is possible to perform press-fitting work together with an auger, and especially when the pile gripping device is opened, the ground auger enables pre-excavation corresponding to the press-fitting depth of the built-in pile.

Further, since a space is provided in the circumferential direction of the casing when the pile gripping device is opened, it is possible to use an auger head larger than the outer diameter of the casing, and the tip resistance of the casing can be reduced for press-fitting work using an earth auger. Can be reduced. Further, the notch corresponding to the rotation stopping member of the casing has an effect that the casing and the auger screw can be moved up and down regardless of the position of the built-in pile.

Further, since the pile press-in / pull-out machine main body can be moved by itself, it can be constructed only by the pile take-in crane. Therefore, there is no need for a large conventional base machine, and the work place is restricted in the press-in work by the earth auger. It is possible to construct with earth auger even in a small urban area without receiving it, and the effect of reducing the intimidation of residents and passersby can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing a structure of a pile press-fitting / pulling machine according to the present embodiment.

FIG. 2 is a cross-sectional view of the pile gripping device in this embodiment.

FIG. 3 is an overall side view showing a working example of assembling a casing and a built-in pile.

FIG. 4 is a side view of an essential part showing the construction procedure of the present embodiment.

FIG. 5 is a side view of a main part showing a construction procedure of the present embodiment.

FIG. 6 is a side view of an essential part showing the construction procedure of the present embodiment.

FIG. 7 is a side view of an essential part showing the construction procedure of the present embodiment.

FIG. 8 is a side view of the main part showing the construction procedure of the present embodiment.

FIG. 9 is a side view of an essential part showing the construction procedure of the present embodiment.

FIG. 10 is a side view of an essential part showing a self-moving procedure during pile press-fitting construction.

FIG. 11 is a side view of an essential part showing a self-moving procedure during pile press-fitting construction.

FIG. 12 is a side view of an essential part showing a self-moving procedure at the time of pile press-fitting construction.

FIG. 13 is a side view of an essential part showing a self-moving procedure during pile press-fitting construction.

[Explanation of symbols]

 1 ... Existing pile 2 ... Built-in pile 3 ... Existing pile clamp 4 ... Base 5 ... Slide base 6 ... Mast 7 ... Pile press-in / pull-out cylinder 8 ... Pile gripping device 8a ... Notch 9 ... Casing receiving chuck claw 10 ... Casing receiving side Chuck cylinder 11 ... Built-in pile chuck claw 12 ... Built-in pile chuck cylinder 13 ... Casing 14 ... Rotation stop member 15 ... Earth auger leader 16 ... Earth auger machine 17 ... Auger screw 18 ... Auger head 19 ... Built-in pile holding chuck 20 ... Lifting body 21 ... Hanging metal fitting 22 ... Stopping metal fitting 23 ... Crane work vehicle 24 ... Crane 25 ... Hook 26 ... Auxiliary winding wire

Claims (7)

[Claims] 1. A base set on an existing pile by an existing pile clamp, a slide base on the upper surface of the base that can be moved back and forth, and a pile press-in / pull-out machine main body standing above the slide base. Mast, a pile press-fitting / pulling-out cylinder and an elevating / lowering body that are arranged so as to be able to move up and down on the side of the mast, a pile gripping device that is pivotally arranged below the lifting and lowering body, and a chuck by this pile gripping device. A pile press-fitting machine comprising a ground auger casing, and a mechanism for chucking the casing and the sheet pile at the same time or only the casing by the pile gripping device. 2. The casing is provided with a rotation stopping member protruding when the earth auger rotates when the pile gripping device is opened, and a cutout portion corresponding to the rotation stopping member is formed in the pile gripping device. Pile press-fitting machine. 3. The slide base has a stroke that is at least twice the pitch of the piles installed, and two built-in piles are press-fitted in the traveling direction from an existing pile in which the mast and the pile gripping device are clamped. The pile press-fitting machine according to claim 1 or 2, which is enabled. 4. A casing receiving chuck claw, a casing receiving side chuck cylinder, a built-in pile chuck claw and a built-in pile chuck cylinder are disposed inside the pile gripping device, and the built-in pile chuck claw is provided. 4. The pile press-fitting machine according to claim 1, wherein an appropriate space is provided between the casing outer diameter and the casing receiving chuck claw when opened. 5. A built-in pile retainer chuck is provided above the abutting portion of the casing with the built-in pile retainer to prevent the casing from falling when the casing is inserted into the pile gripping device, and above the built-in pile retainer chuck. 5. The pile press-fitting machine according to claim 1, wherein the earth auger leader is formed integrally with the casing, and the earth auger excavator is arranged on the side of the earth auger leader so as to be able to move up and down. 6. A pile press-in / pull-out cylinder and a lifting / lowering cylinder are installed on the side of a mast standing above a slide base provided on the upper surface of the base, the base being set on the existing pile by an existing pile clamp. A body is arranged so that it can be lifted up and down, a pile gripping device is arranged below the lifting body so that it can rotate, and a casing for earth augers that is chucked by this pile gripping device is provided, and a built-in pile holding chuck After chucking with, the casing is inserted into the pile gripping device, and the casing receiving chuck claw and the built-in pile chuck claw are used for chucking. While simultaneously press-fitting into the ground, if the ground is hard, drive only the earth auger machine to reduce the press-fitting resistance, open the pile gripping device at the completion of the press-fitting stroke, and A pile press-fitting / pulling-out method, wherein the piles are press-fitted to a predetermined depth by repeating the process of raising the pile gripping device by the action of the press-fitting / pulling-out cylinder. 7. The advance of the built-in pile by stopping the advance excavation by the earth auger to advance the built-in pile, opening the pile gripping device, and then reversing the earth auger to raise the casing by the earth discharging force. The pile press-fitting / pulling-out method according to claim 4, wherein the position is secured and the upper end of the built-in pile is press-fitted to a certain height by a pile gripping device.