JP2013129988A - Compaction jig and compaction method of ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compaction jig of the ground which is suitable for the rolling compaction of the ground in which a steel-pipe pile has been implanted and a compaction method of the ground using the compaction jig.SOLUTION: The compaction jig installed in a compactor which compacts the ground includes: an attachment part for attaching the compactor to a pressing device; a rolling compaction part to be pressed by the pressing device; and a connection part for connecting the attachment part with the rolling compaction part. The rolling compaction part is disposed in the periphery of a pile projecting from the ground, and disposed so as not to interfere with the pile.

Description

  The present invention relates to a ground compaction jig and a ground compaction method using the compaction jig.

As a conventional ground improvement, for example, a method of digging a groove in accordance with a cloth foundation, laying a crushed stone and rolling it is performed. In general, this rolling is performed by moving a range to be rolled using a tamping rammer or a plate rammer.
However, since the conventional rolling plate has a quadrangular shape, it is difficult to roll the improved area around the steel pipe pile into a circle, and furthermore, the ground that has been rolled while moving the rectangular rolling plate is rolled. There was also a problem that unevenness occurred.
Reference should be made to Patent Document 1 which discloses the prior art related to the present invention.

Japanese Patent No. 4053353

  The inventors of the present invention have made extensive studies in order to more efficiently perform rolling on the ground in which a large number of the above-described steel pipe piles are driven. As a result, the present inventors have come up with a compacting jig provided with a compaction portion arranged so as to be able to compact the surrounding ground of the pile without interfering with the pile.

The present invention has been made in view of the above-mentioned problems, and the first aspect is defined as follows. That is,
A compacting jig provided in a compacting machine for compacting the ground,
A mounting portion attached to a pressing device for pressing the compacting machine;
A rolling part that is pressed by the pressing device;
A connecting portion for connecting the attachment portion and the rolling portion,
The rolling part is arranged around a pile protruding from the ground, and arranged not to interfere with the pile,
Compaction jig.

According to the compacting jig of the first aspect defined in this way, it is possible to compact the surrounding ground of the pile without interfering with the pile protruding from the ground. According to the compacting machine provided with the compaction jig, since the ground around the pile can be compacted without moving around the pile, compaction can be performed efficiently.
The connecting portion may have a length of 0.4 to 1.5 m in the longitudinal direction (second aspect).
The said rolling compaction part is good also as a structure which consists of a substantially circular flat plate which has a plane part, and is equipped with the circular opening part in the center of this circular flat plate (3rd aspect).

FIG. 1 is a perspective view of a compacting jig 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of compaction jigs 11, 21, 31, 41 according to another embodiment of the present invention. FIG. 3 is a perspective view of a compacting jig 51 according to another embodiment of the present invention. FIG. 4 is a perspective view of a compacting jig 61 according to another embodiment of the present invention. FIG. 5 is a schematic diagram for explaining a method of reinforcing a pile that can effectively use the compacting machine including the compacting jig 1 according to the embodiment of the present invention. FIG. 6 is a schematic diagram for explaining a ground compaction method using the compaction jig 1 according to the embodiment of the present invention. 7A is a perspective view, FIG. 7B is a bottom view, and FIG. 7C is a side view of a compacting jig 81 according to another embodiment of the present invention.

Hereinafter, the compaction jig according to the embodiment of the present invention will be described.
FIG. 1 shows a schematic configuration of a compaction jig 1 according to an embodiment of the present invention.
As shown in FIG. 1, the compacting jig 1 includes an attachment part 3, a rolling part 5, and a connecting part 7.
The attachment portion 3 is provided on the upper surface of the compacting jig and is provided for attaching the compacting jig to a pressing device for pressing the compacting machine. The attachment portion 3 only needs to be configured to be attached to the pressing device, and can be attached by screwing, for example. The compaction jig of the present invention can be attached to an existing construction machine such as a rammer or a backhoe by providing the attachment portion 3, and can be used by appropriately replacing the compaction jig. The attachment portion 3 can be particularly attached to the tamping rammer, and the below-described attachment portion 33 (see FIG. 2C) can be particularly attached to the plate compactor rammer.

The rolling part 5 is provided on the bottom surface of the compacting jig and is pressed by a pressing device to compact the ground contacting the rolling part 5. The compacting jig of this invention is used for compacting the ground from which the piles protrude. Therefore, it is preferable to employ a configuration in which the compaction part is arranged around the pile so that the compaction jig and the pile do not interfere with each other, that is, the compaction part 5 and the pile do not interfere with each other. As such a compaction part, it can be made into a donut shape which consists of a substantially circular flat plate like the compaction part 5 shown in FIG. 1, and has a circular opening part in the center of the said circular flat plate so that it may not interfere with a pile. . Moreover, as shown to FIG. 2 (A), it is good also as the helical rolling part 13 which provided the notch. Also when the rolling part 13 is used, the ground around the pile can be compacted by suppressing the movement of the compacting machine without interfering with the pile. Furthermore, as shown to FIG. 2 (B), it is good also as arrange | positioning the multiple compaction parts 23 so that it may not interfere with a pile. The desired effect can also be obtained when the rolling unit 23 is used. The plurality of rolling parts 23 can be provided for each connecting part 7 to be described later.
In addition, the said press apparatus can press a compacting machine, ie, can apply a force to a substantially perpendicular direction with respect to the ground, and can be vibrated and / or rotated with it. In this case, the rolling unit 5 can receive the force and compact the ground or the reinforcing layer that contacts the lower surface of the rolling unit 5.

  The connecting part 7 connects the mounting part 3 and the rolling part 5 to transmit the pressing force from the pressing device to the rolling part 5. The length of the connecting portion 7 is 0.4 to 1.5 m in the longitudinal direction in order to prevent the pile protruding from the ground surface and the compacting jig 1, that is, the mounting portion 3 from interfering with each other. It is preferable to have. The connecting portion 7 is not particularly limited in its shape and the like as long as it can transmit the pressure to the rolling portion 5, but for example, it may be a plate-like member as shown in FIG. 1 or as shown in FIG. It is good also as comprising by a rod-shaped member like the connection part 35. FIG. The rod-shaped member may be solid from the viewpoint of improving the strength, or may be hollow from the viewpoint of reducing the weight. Moreover, the material of the connection parts 7 and 35 will not be restrict | limited especially if it can endure the said press, For example, it can be steel. Furthermore, it is preferable that the connection part 7 and the attachment part 3, and the connection part 7 and the rolling part 5 are firmly joined by welding, for example. Furthermore, it is good also as comprising by a cylindrical member like the connection part 45 shown to FIG 2 (D). The diameter of the bottom surface of the cylindrical member may be equal to or smaller than the diameter of the rolling part 5 as long as it is equal to or larger than the diameter of the opening of the rolling part 5. Moreover, the connection part 45 and the attachment part 43 can be joined by welding as mentioned above.

FIG. 3 shows a schematic configuration of a compacting jig 51 according to another embodiment. In FIG. 3, the same elements as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is partially omitted.
FIG. 3 shows a compacting jig 51 that can prevent the side wall of the ground from collapsing during compaction. That is, the compaction jig 1 shown in FIG.
The collapse preventing part 53 is provided as a cylindrical member on the outer periphery of the upper part of the rolling pressure part 5. The material of the collapsing prevention part 53 should just be equipped with the intensity | strength which can resist the collapsing of the side wall of a ground, for example, can use steel. The height of the collapsing prevention portion 53 is not particularly limited, and may be appropriately designed depending on the length of the pile protruding from the ground and the depth of the space provided on the ground where the pile is struck.
In the compacting jig 51, the connecting portion is preferably designed as a trapezoidal connecting portion 55 so as to be able to be joined to the rolling pressure portion 5 and the collapse preventing portion 53.

FIG. 4 shows a schematic configuration of a compaction jig 61 according to another embodiment. In FIG. 4, the same elements as those in FIGS. 1, 2, and 3 are denoted by the same reference numerals, and description thereof is partially omitted.
FIG. 4 shows a compaction jig 61 that can reduce noise during compaction. That is, the compacting jig 1 shown in FIG.
The muffler buffer 63 is provided along an opening provided in the rolling unit 5. The material of the silencing buffer 63 is not particularly limited as long as it does not generate noise by contact with the pile, and rubber can be used, for example. Further, the thickness of the silence buffer 63 can be designed to a thickness that does not interfere with the pile. The thicker one is more preferable from the point of the silencing and buffering effect.

A method of reinforcing a pile that can effectively use the compacting machine including the compacting jig 1 of the present invention will be described with reference to FIG.
The pile 71 and the ground 73 are shown in FIG.
First, the pile 71 is embed | buried in the ground 73 as a foundation of a building (not shown) (refer FIG. 5 (B)).
Next, the soil of the peripheral area | region of the pile head 72 of the pile 71 is removed, the space part 75 is formed, and the pile 72 is exposed (refer FIG.5 (C)). The space 75 has a cylindrical shape with a diameter of 150 to 1500 mm and a depth of 150 to 1500 mm with the pile 71 as an axis. A bottom surface 77 of the space 75 is a substantially horizontal plane.
Further, as shown in FIG. 5D, a crushed stone 78 is laid on the bottom surface 77 of the formed space portion 75 to form a reinforcing layer 79. The thickness of the reinforcing layer 79 is 50 to 1500 mm. The crushed stone 78 is densely laid, and the upper surface of the reinforcing layer 79 is substantially horizontal. When laying the crushed stone 78, it is preferable to apply a pressing force to the crushed stone 78. For example, it is preferable to disperse the crushed stone 78 into the space 75 a plurality of times and to compress the crushed stone 78 each time it is introduced. By dividing the pressing operation into a plurality of times, the reinforcing layer can be made stronger, and when a sufficient opening area cannot be secured in the space 75 or in a narrow working space such as under the floor. Even when it is difficult to apply a large force to the reinforcing layer at once, the reinforcing layer can be sufficiently pressed. As a result, the surrounding ground of the reinforcing layer is strengthened, and the embedded state of the pile is further stabilized.
The surface of the reinforcing layer 79 that faces the pile 71 is in contact with the outer peripheral surface of the pile 71. Then, the space part 75 is refilled and construction is completed. The entire space 75 may be filled with crushed stone 78 to form a reinforcing layer.

A method for compacting the ground around the pile using the compacting machine equipped with the compacting jig 1 of the present invention will be described with reference to FIG.
As described above, in the construction method of the present invention, the ground on the bottom surface of the space 75 is a target to be compacted.
As shown in FIG. 6, the pile head 72 of the pile 71 that has been laid out projects from the center of the space 75 provided in the ground 73. The compacting jig is selected in consideration of the length and thickness of the pile and the shape of the bottom surface of the space 75 that is also received by the ground. That is, the rolling part 5 provided with a sufficient opening so that the pile 71 does not interfere with the rolling part 5 and having a diameter capable of compacting the crushed stone laid in the space part 75 and the bottom ground, and the pile The compacting jig 1 composed of the connecting portion 7 having a sufficient length so that the head 72 does not interfere with the mounting portion 3 is selected. Further, the compacting jig is attached to the compacting machine main body via the mounting portion 3 to constitute the compacting machine 80. And the crushed stone and bottom ground of the space part 75 are compacted by the pressing to the rolling pressure part 5 from the pressing device of the compacting machine 80.

FIG. 7 shows a schematic configuration of a compaction jig 81 according to another embodiment. In FIG. 7, the same elements as those in FIGS. 1, 2, 3, and 4 are denoted by the same reference numerals, and the description thereof is partially omitted.
FIG. 7 shows a compacting jig 81 that can compact the ground more effectively by pressing and rotating the rolling part. In other words, the compacting jig 1 shown in FIG. 1 further includes a rotating and rolling portion 87, and includes a mounting portion 83 and a connecting portion 85 instead of the mounting portion 3 and the connecting portion 7.
The rotary rolling unit 87 is provided on the bottom surface of the rolling unit 5. The rotary rolling unit 87 only needs to be provided so that the ground can be more firmly compacted by the rotation of the rolling unit 5. For example, the rotary rolling unit 87 can be provided to protrude from the rolling unit 5. Thus, by providing the rotation rolling part 87, the force by a pressing device concentrates on the rotation rolling part 87 protruded from the lower surface of the rolling part 5, and can be firmly compacted. Further, since the rotary rolling unit 87 is further rotated, the entire lower surface of the rolling unit 5 can be uniformly compacted. The rotary rolling unit 87 may be, for example, a semi-cylindrical steel pipe, and can be joined to the rolling unit 5 by welding as a part of the rolling unit. Thus, by providing the rotation compaction part 87, fixed pressing force and rotation can be used together, and the ground can be more effectively compacted.
In addition, in order to solidify the ground firmly, it is good also as vibrating the compaction part 5 provided with the rotational compaction part 87 further.

  As mentioned above, although embodiment of this invention has been described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Furthermore, among these, two or more embodiments may be partially combined.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

1 11 21 31 41 51 61 81 Compaction jig 3 33 43 83 Mounting part 5 13 23 Rolling part 7 35 45 55 85 Connection part 53 Collapse prevention part 63 Silencing buffer part

Claims (10)

A compacting jig provided in a compacting machine for compacting the ground,
A mounting portion attached to a pressing device for pressing the compacting machine;
A rolling part that is pressed by the pressing device;
A connecting portion for connecting the attachment portion and the rolling portion,
The rolling part is arranged around a pile protruding from the ground, and arranged not to interfere with the pile,
Compaction jig.   The compacting jig according to claim 1, wherein the connecting portion has a length of 0.4 to 1.5 m in the longitudinal direction.   The compacting jig according to claim 1 or 2, wherein the compaction portion is formed of a substantially circular flat plate having a flat portion, and a circular opening is provided at the center of the circular flat plate.   The compacting jig according to claim 1, wherein the compaction portion is configured in a spiral shape so as to have an opening at the center of the compaction portion.   The compacting jig according to claim 1 or 2, comprising a plurality of the compaction parts for each of the coupling parts.   The compaction jig according to any one of claims 1 to 5, wherein the compaction unit includes a rotary compaction unit that compacts the ground by rotation of the compaction unit on a bottom surface thereof.   The compaction jig as described in any one of Claims 1-6 provided with the collapsing prevention part which prevents the collapsing of the side wall of the said ground on the outer periphery of the said rolling pressure part.   The compacting jig according to any one of claims 3 to 7, further comprising a muffler buffer along the opening of the rolling portion.   A compacting machine comprising the compacting jig according to claim 1.   A ground compaction method using the compaction machine according to claim 9.

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