JP6957256B2 - Embankment area compaction method and compaction attachment device - Google Patents

Description

The present invention relates to a compaction method and a compaction attachment device for an embankment area, and particularly to a compaction method and a compaction attachment device suitable for compaction of an embankment area adjacent to a wall surface or a convex portion of a bedrock.

When constructing civil engineering structures such as dams, roads, and embankments using concrete, the usual construction method is to place slump concrete in each block of appropriate size and compact it with a vibrator (internal vibrator). Instead of the block method or the layer method), a compaction machine such as a vibrating roller is run on the embankment surface where hard-mixed concrete with a slump value of zero is laid in a thin layer and stacked, and compaction is performed (Roller Compacted Dam-). A concrete method (hereinafter referred to as RCD method) has been developed (see Non-Patent Document 1). Compared to the block method or layer method using slump concrete, the RCD method can cast hardened concrete (hereinafter referred to as RCD concrete) over a large area in a short time without providing a formwork. It is possible to suppress the temperature rise due to heat of hydration, improve the concrete placing speed, rationalize the construction, shorten the construction period, and so on.

Further, in the recent RCD method, in order to compact not only the flat portion of the embankment area E of the RCD concrete but also the slope portion of the embankment area E, the construction machine 1 with the movable arm member 3 as shown in FIG. 3 (A) 1 (For example, backhoe) may be used as a compaction machine. In the construction machine 1 of the illustrated example, the compaction attachment device 12 as shown in FIG. 3B is attached to the tip of the movable arm member 3 whose base end is supported by the mobile swivel table 2. It is called a plate type compactor (FPC) (see Patent Documents 1 and 2).

In the plate-type compaction machine 1 of FIG. 3A, the boom 5 whose base end is supported by the swivel base 2 so as to be raised and lowered, and the bendable and stretchable arm 6 supported by the tip 5b of the boom 5 are also booms. It has a movable arm member 3 including a telescopic attachment drive mechanism 7 supported on the tip 5b of the 5. Further, the compaction attachment device 12 of FIG. 3B connects a flat compaction plate 30 pressed against the embankment area E to be compacted and the compaction plate 30 to the tip of the movable arm member 3. Two support pins 22 and 23 parallel to the compaction plate 30 are bridged between the pair of brackets 21a and 21b above the joint portion 20. By pin-joining one support pin 23 to the joint (pin hole) 6b at the tip of the arm 6, and pin-joining the other support pin 22 to the joint (pin hole) 7d at the tip of the attachment drive mechanism 7. The compaction attachment device 12 is attached to the tip of the movable arm member 3. The attached compaction attachment device 12 can be appropriately rotated and tilted around the support pin 23 parallel to the compaction plate 30 by the expansion and contraction of the attachment drive mechanism 7.

The compaction plate 30 of the compaction attachment device 12 of FIG. 3 (B) is a vibrating device 31 that vibrates the compaction plate 30 in the normal direction P on the side opposite to the pressing surface 30a pressed against the embankment area E. Are concatenated. The vibration exciter 31 is housed in a housing 34 in a space surrounded by a connecting plate 35 provided below the joint portion 20 and a pair of holding plates 36 and 37, and is joined via elastic bearings 38a and 38b. It is supported by part 20. Therefore, as shown in FIG. 3A, the compaction plate 30 is pressed against the slope of the embankment area E while being appropriately tilted, and the compaction plate 30 is vibrated in the normal direction P by the vibration exciter 31. The slope of the shape can be compacted.

In the plate type compaction machine 1 of the illustrated example, not only the slope portion of the embankment area E as shown in FIG. 3 (A) but also the embankment area 30 is pressed horizontally as shown in FIG. 4 (A). The flat portion of E can also be compacted, and the compaction work of the flat portion and the slope portion can be repeated while moving on the embankment area E and changing the pressing position of the compaction plate 30. Further, as shown in FIG. 4B, by expanding and contracting the movable arm member 3 or appropriately rotating the swivel base 2 of the compaction machine 1, the compaction plate 30 is placed at a position corresponding to the expansion and contraction and rotation. Can be moved. In the RCD method, a relatively wide flat portion is suitable for compaction by a vibrating roller, but compaction by a plate type compacting machine 1 is effective for a flat portion and a slope portion where it is difficult to run the vibrating roller.

Japanese Unexamined Patent Publication No. 2016-08645 Japanese Unexamined Patent Publication No. 2013-209843

Tsuneo Uesaka et al. "Progress in Compaction Method-Focusing on RCD Method-" Concrete Engineering, Vol. 23, No. 7, 1985, Internet (URL: https://www.jstage.jst.go.jp/article/coj1975/23/7/23_74/_article/-char/ja/)

However, the above-mentioned conventional plate type compaction machine 1 is shown in the existing structure as shown in FIG. 5 (A), the embankment area E adjacent to the wall surface W such as both banks of the valley, or FIG. 5 (C). There is a problem that it is difficult to properly compact the embankment area E adjacent to the rock convex portion R. That is, when the RCD method is applied to the area adjacent to the wall surfaces W1 and W2 as shown in FIG. 5 (A), the plate type compacting machine 1 and the movable arm member 3 are attached to the wall surface W1 and W1 as shown in FIG. The embankment area E of the RCD concrete will be compacted while moving along W2, but the adjacent wall surfaces W2 and W1 will be obstacles to the movement, and the position where compaction should be originally performed (for example, shown in FIG. 5B). The compaction plate 30 cannot be moved to the corners sandwiched between the wall surfaces W1 and W2), and a compaction impossible region D by the plate-type compaction machine 1 may occur. In the illustrated example, even if the movable arm member 3 of the plate type compaction machine 1 is expanded and contracted or the swivel base 2 is rotated, the compaction plate 30 is placed in the corner portion (innermost portion) sandwiched between the wall surfaces W1 and W2. It is difficult to move. As shown in the illustrated example, in the embankment area E adjacent to the wall surfaces W1 and W2, it is required to develop a plate type compaction machine 1 that does not generate a compaction impossible area D.

In addition, Fig. 5 (C) shows a complex rock formation part of the terrain (a part where uneven rock mass such as a riverbed or abutment and a civil engineering structure come into contact with each other). The RCD method may be applied to. However, in the embankment area E adjacent to the rock convex portion R as shown in the illustrated example, the plate type compaction machine 1 and the movable arm member 3 are finely moved back and forth and left and right according to the terrain as shown in FIG. 5 (D). The direction of the compaction plate 30 must be changed many times and pressed against the embankment area E of the RCD concrete, which takes a very long time for the compaction work. If the compaction work takes a long time, the freshness of the RCD concrete will be lost, so the area for one casting will be limited due to the limitation of the allowable time for jointing, and the advantage of the RCD method is that the casting speed will be improved. Is not obtained, and it becomes difficult to improve the efficiency of construction. Further, if the position of the compaction machine 1 is changed many times, the surface of the cast RCD concrete becomes rough, and the construction quality may deteriorate.

Therefore, an object of the present invention is to provide a method and a compaction attachment device capable of efficiently compacting even in an embankment area adjacent to a wall surface or a rock convex portion without generating a compaction impossible area.

With reference to the embodiment of FIG. 1, the method of compacting the filling area according to the present invention is when compacting the filling area E (see FIGS. 5A and 5C) adjacent to the wall surface W or the rock convex portion R. A vibration device 31 that vibrates the compaction plate 30 in the normal direction is connected to the side opposite to the pressing surface 30a of the flat compaction plate 30 that is pressed against the surface of the filling area E. Is attached to the tip of the movable arm member 3 of the construction machine 1 with the movable arm member 3 via a rotation support mechanism 40 that rotatably supports around the normal axis P of the compaction plate 30 and is attached to the rotation support mechanism 40. including rotational angle restricting stopper 43a that restricts the rotation angle θ of the compaction plate 30 in the range of -180 ° to 180 °, a cable vibration generating device 31 while preventing the entangled to the rotation support mechanism 40, compaction Any part of the plate 30 is abutted against the wall surface W or the rock convex portion R, and a force is applied to the compaction plate 30 in a direction intersecting the normal axis P to rotate the compaction plate and compact the filling area E. It is solidified. For example, the pressing angle θ around the normal axis P of the compacting plate 30 is changed by abutting any part of the compacting plate 30 against the surface of the wall surface W, the rock convex portion R, or the embankment area E.

Further, referring to the examples of FIGS. 1B and 1C, the compaction attachment device 10 according to the present invention has a joint portion 20 connected to the tip of the movable arm member 3 of the construction machine 1 with the movable arm member 3. , The flat compaction plate 30 pressed against the surface of the filling area E to be compacted, and the compaction plate 30 connected to the side opposite to the pressing surface 30a against the filling area E to form the compaction plate 30 in the normal direction. A rotational support mechanism 40 that rotatably supports the compaction plate 30 around the normal axis P is provided between the exciting device 31 and the joining portion 20 and the exciting device 31. The rotation support mechanism 40 includes a rotation angle limiting stopper 43a that limits the rotation angle of the compaction plate 30 within the range of −180 ° to 180 °, and the filling area E adjacent to the wall surface W or the bedrock convex portion R (FIG. 5 (FIG. 5). When compacting (see A) and (C)), while preventing the cable of the vibration exciter 31 from being entangled with the rotation support mechanism 40, any part of the compaction plate 30 is formed on the wall surface W or the bedrock convex portion R. in which to rotate the compaction plate by adding force intersecting the normal to axis P in compacted plate 30 formed by compacting the fill area E abutment with the. Desirably, the compaction plate 30 is a square or a polygon such as a triangle, a trapezoid, or a rhombus.

Preferably, rotating the support mechanism 40, including a bearing portion 43 that rotatably supports the normal direction of the rotation axis 41 of the compaction plate 30 and the other end of the rotary shaft 41, the rotary shaft 41 vibration generating device 31 The bearing portion 43 can be fixed to the bottom surface of the joint portion 20 while being fixed to the connecting plate of the above, or the rotating shaft 41 can be fixed to the bottom surface of the joining portion 20 and the bearing portion 43 can be fixed to the connecting plate of the vibration device 31. Is also possible. Desirably, the compaction plate 30 is a square or a polygon such as a triangle, a trapezoid, or a rhombus.

The compaction method and compaction attachment device according to the present invention is a flat compaction plate 30 that is pressed against the surface of the filling area E when compacting the filling area E adjacent to the wall surface W or the bedrock convex portion R. A vibration device 31 that vibrates the compaction plate 30 in the normal direction is connected to the side opposite to the pressing surface 30a of the above, and the vibration device 31 is attached to the tip of the movable arm member 3 of the construction machine 1 with the movable arm member 3. It is attached via a rotation support mechanism 40 that rotatably supports around the normal axis P of the compaction plate 30, and the rotation angle θ of the compaction plate 30 is set in the range of −180 ° to 180 ° to the rotation support mechanism 40. While preventing the cable of the exciting device 31 from being entangled with the rotation support mechanism 40, including the rotation angle limiting stopper 43a that limits the inside, any part of the compaction plate 30 is thrust into the wall surface W or the bedrock convex portion R. By applying a force to the compaction plate 30 in the direction intersecting the normal axis P to rotate the compaction plate, the filling area E is compacted, so that the following advantageous effect is obtained.

(B) By rotatably attaching the compaction plate 30 to the tip of the movable arm member 3 of the construction machine 1 around its normal axis P, the posture of the construction machine 1 and the movable arm member 3 is independent of the posture. The pressing angle θ of the compaction plate 30 against the filling area E can be arbitrarily changed (see FIG. 2A).
(B) For example, even if it is difficult to change the position or posture of the construction machine 1 and the movable arm member 3 due to the wall surface W or the rock convex portion R, the compaction plate 30 is abutted against the wall surface W or the rock convex portion R in the normal direction. By rotating around the shaft P, the pressing position and the angle θ of the compaction plate 30 can be changed.
(C) Therefore, even in the embankment area E (see FIG. 2B) surrounded by the wall surfaces W1 and W2, the compaction plate 30 is compacted so as to always be in contact with the wall surface W or the rock convex portion R. This makes it possible to reliably compact the entire embankment area E without generating a compaction impossible area D.

(D) Further, in the complicated filling area E of the terrain that could not be compacted without changing the positions and postures of the construction machine 1 and the movable arm member 3 many times in the past, the rotation of the compaction plate 30 Since the compaction can be performed without changing the positions and postures of the construction machine 1 and the movable arm member 3 or by changing them a few times, improvement in work efficiency and improvement in construction quality can be expected.
(E) Therefore, even in the embankment area E (see Fig. 2 (C)) where the terrain is complicated and adjacent to the rock convex part R such as the riverbed and abutment, it can be compacted in a short time without leakage, and RCD concrete. It is possible to improve the efficiency of construction using.
(F) If the vibration device 31 is connected to the compaction plate 30, and the rotation support mechanism 40 is arranged between the vibration device 31 and the compaction plate 30 and the movable arm member 3 of the construction machine 1. , The influence of the rotation support mechanism 40 on the vibrating device 31 can be suppressed to a small value, and the same compaction density as the conventional one can be obtained by the same compaction work as the conventional one.

Hereinafter, embodiments and examples for carrying out the present invention will be described with reference to the accompanying drawings.
Is an explanatory diagram of an embodiment of the compaction attachment device according to the present invention. Is an explanatory diagram of an embodiment of a compaction method using the compaction attachment device according to the present invention. Is an explanatory diagram of an example of a conventional compaction attachment device. Is an explanatory diagram of an example of a compaction method using a conventional compaction attachment device. Is an explanatory diagram of another example of the compaction method using the conventional compaction attachment device.

FIG. 1 shows an example in which the present invention is applied to a construction site where a civil engineering structure such as a concrete dam is constructed by the RCD method. In the RCD method of the illustrated example, hard-kneaded RCD concrete is used as the embankment material S, and the embankment materials S1 to S4 sprinkled with a predetermined thickness (for example, 25 cm) per layer are first sprinkled into three layers (for example, 75 cm) or four layers (for example, 75 cm). For example, it is piled up on 100 cm) to form an embankment area E (for example, a dam body). Next, the plate-type compaction machine 1 (see FIG. 1 (A)) to which the compaction attachment device 10 of the present invention (see FIGS. 1B and 1C) is attached is put into the embankment area E, and is placed on the embankment area E. The compaction work of the flat portion and the slope portion is repeated while changing the pressing position of the compaction attachment device 10. Although the illustrated example shows the compaction work of the flat portion, the present invention can also be applied to the slope portion as shown in FIG. 3 (A).

The plate type compaction machine 1 of FIG. 1 (A) has a swivel table 2 mounted on a moving portion 2a (for example, a caterpillar or the like) and a swivel table 2 thereof, similarly to the construction machine 1 of FIG. 3 (A). It is a construction machine (hydraulic excavator, backhoe, etc.) having a movable arm member 3 whose base end is supported. The swivel table 2 includes a driver's seat 4 and a counterweight 2b, and can be moved to an arbitrary place on the compaction area E by the caterpillar 2a and swivel 360 degrees around the rotation center O on the caterpillar 2a (FIG. 4). (B)). The moving portion 2a may be a tire instead of the caterpillar. Further, the movable arm member 3 includes a boom 5 whose base end can be raised and lowered on the swivel base 2, a bendable arm 6 whose one end is supported by the tip 5b of the boom 5, and the tip of the boom 5. It is provided with a telescopic attachment drive mechanism 7 supported by 5b.

A boom drive cylinder 5a is bridged from the swivel base 2 to the boom 5 of the movable arm member 3, and the tip 5b of the boom 5 can be raised and lowered with respect to the swivel base 2 by expanding and contracting the drive cylinder 5a. Further, an arm drive cylinder 6a is bridged from the boom 5 to the arm 6, and the tips 6b and 7d of the arm 6 and the drive device 7 can be bent and extended with respect to the boom 5 by expanding and contracting the drive cylinder 6a. .. The attachment drive mechanism 7 is composed of a drive cylinder 7a and link mechanism rods 7b and 7c, and the tip 7d of the drive device 7 can be rotated around the tip 6b of the rod 6 by expanding and contracting the drive cylinder 7a. ..

The compaction attachment device 10 of the illustrated example is a flat compaction plate 30 pressed against the surface of the embankment area E and the movable arm member 3 in the same manner as the conventional compaction attachment device 12 shown in FIG. 3 (B). It has a joint portion 20 for connecting to the tip. As shown in FIGS. 1B and 1C, two support pins 22 and 23 are bridged between the pair of brackets 21a and 21b above the joint portion 20 in parallel with the compaction plate 30 and one of them. The support pin 23 is pin-bonded to the joint (pin hole) 6b at the tip of the arm 6, and the other support pin 22 is pin-joined to the joint (pin hole) 7d at the tip of the attachment drive mechanism 7.

By attaching the attachment device 10 to the tips of the arm 6 and the drive mechanism 7, the arm 6 applies a pressing force in the normal direction to the compaction plate 30, and the drive mechanism 7 compacts the rotational force around the support pin 23. It can be added to the plate 30, and the compaction plate 30 can be applied to both the flat portion and the slope portion of the compaction area E. That is, the operation of the attachment drive mechanism 7 makes it possible to change the elevation angle and the depression angle of the compaction plate 30 with respect to the boom 5 of the movable arm member 3. However, the operation of the attachment drive mechanism 7 cannot change the direction of the compaction plate 30 (rotation angle around the normal axis P).

Further, the compaction attachment device 10 of the illustrated example is a vibration exciting device (for example, hydraulic pressure) that vibrates the compaction plate 30 in the normal direction P on the side opposite to the pressing surface 30a of the compaction plate 30 that is pressed against the embankment area E. (Motor, etc.) 31 is provided. The vibrating device 31 is housed in the housing 34 and is supported via elastic bearings 38a and 38b in a space surrounded by the connecting plate 35 and the pair of holding plates 36 and 37. By connecting the vibration exciter 31 to the compaction plate 30, a high-speed and strong impact force can be applied to the compaction plate 30. Preferably, the central axis of the vibrating device 31 in the vibration direction is aligned with the normal axis P passing through the center of gravity of the compaction plate 30 (see FIG. 1C). However, the vibrating device 31 is not essential to the present invention and may be omitted.

Further, the compaction attachment device 10 of the illustrated example has a new configuration different from that of the conventional compaction attachment device 12, in which the compaction plate 30 is placed around the normal axis P between the joint portion 20 and the compaction plate 30. Is provided with a rotation support mechanism 40 that rotatably supports the vehicle. In the conventional compaction attachment device 12, as shown in FIG. 3A, the compaction plate 30 is fixed in a fixed direction with respect to the joint portion 20, and the orientation of the compaction plate 30 with respect to the joint portion 20 is set. Could not change. Therefore, when changing the pressing position or pressing angle of the compaction plate 30 in the embankment area E, the posture (position or angle) of the construction machine 1 or the movable arm member 3 is changed as shown in FIG. 5 (D). I had to change it. By providing the rotation support mechanism 40, for example, even if it is difficult to change the postures of the construction machine 1 and the movable arm member 3 as shown in FIG. 2 (A), the postures of the construction machine 1 and the movable arm member 3 are independent of the postures. , The pressing position of the compaction plate 30 against the filling area E and the pressing angle θ around the normal axis P can be arbitrarily changed.

An example of the rotation support mechanism 40 is shown in FIGS. 1 (B) and 1 (C). The rotation support mechanism 40 of the illustrated example includes a rotation shaft 41 in the normal direction of the compaction plate 30, and a bearing portion 43 that rotatably supports the other end of the rotation shaft 41. For example, the rotation shaft 41 in the normal direction is attached to the plate-shaped rotation shaft base 42 and fixed to the top surface of the compaction plate 30 (in the illustrated example, the top surface of the connecting plate 35 accommodating the vibration device 31), and the bearing is supported. The portion 43 is attached to the plate-shaped bearing base 44 and fixed to the bottom surface of the joint portion 20. However, the rotating shaft 41 and the bearing portion 43 may be oriented in opposite directions, the rotating shaft 41 may be fixed to the bottom surface of the joint portion 20, and the bearing portion 43 may be fixed to the top surface of the compaction plate 30.

It is desirable that the rotation shaft 41 of the rotation support mechanism 40 is aligned with the normal axis P passing through the center of gravity of the compaction plate 30 (see FIG. 1C). Further, the rotating shaft 41 may be provided with a stopper 41a for preventing the rotating shaft 41 from coming off from the bearing portion 43. Further, when the compaction attachment device 10 includes a vibrating device 31 that vibrates the compaction plate 30 in the normal direction, the compaction plate 30 and the vibrating device 31 are rotated by 360 degrees or more in a constant direction by the rotation support mechanism 40. Then, the cable of the vibration device 31 or the like may be entangled with the attachment device 10 and lead to an accident. In order to prevent such an accident, the rotation support mechanism 40 can include, for example, a rotation angle limiting stopper 43a that limits the rotation angle θ of the compaction plate 30 within the range of −180 ° to 180 °.

In the illustrated example, the compaction plate 30 supported by the rotation support mechanism 40 can be rotated according to a force in the direction intersecting the normal direction axis P applied to the compaction plate 30 (for example, a force in the horizontal direction). For example, in the embankment area E adjacent to the wall surfaces W1 and W2 as shown in FIG. 2B, compaction is performed by abutting any end edge of the compaction plate 30 against the wall surface W and applying a force in the horizontal direction. The pressing angle θ of the plate 30 against the embankment area E can be adjusted. Further, at least one side (one end edge) of the compaction plate 30 is abutted so as to always be in contact with the wall surface W and moved along the wall surface W while applying a horizontal force to reduce the pressing angle θ of the compaction plate 30. It can be gradually changed along the wall surface W. Further, as shown in the illustrated example, at the corner portion (innermost portion) surrounded by both wall surfaces W1 and W2, the two sides (two end edges) of the compaction plate 30 may abut against both wall surfaces W1 and W2 without a gap. It is possible. By doing so, in the embankment area E adjacent to the wall surfaces W1 and W2, it is possible to reliably compact the entire embankment area E while avoiding the occurrence of the non-compacting area D (see FIG. 5B). Become.

The compaction plate 30 may be shaped so that at least one side (one end edge) abuts against the wall surface W adjacent to the compaction area E. When the wall surfaces W1 and W2 adjacent to the embankment area E intersect at right angles as shown in FIG. 2B, the compaction plate 30 is moved to the corner (innermost portion). The shape of the compaction plate 30 is square so that the two sides (edges) of the above abut each other on both wall surfaces W1 and W2. However, the shape of the compaction plate 30 is not limited to a square shape, and the compaction plate 30 may be a polygon such as a triangle, a trapezoid, or a rhombus according to the shape of the wall surface W adjacent to the embankment area E to be compacted. It is possible. It is also effective to provide a curved end edge on the compaction plate 30 according to the shape of the adjacent wall surface W.

Further, by providing the rotation support mechanism 40, the pressing position and the angle θ of the compaction plate 30 can be changed without finely moving the postures (positions and angles) of the construction machine 1 and the movable arm member 3. Since it can be done, it can be expected to improve the efficiency of compaction work. That is, in the compaction plate 30 without the rotation support mechanism 40, the embankment area E of a complicated terrain that could not be compacted without changing the postures of the construction machine 1 and the movable arm member 3 many times (FIG. 5 (FIG. 5). Also in (C) and (D)), for example, as shown in FIG. 2 (C), by using the compaction plate 30 provided with the rotation support mechanism 40, the postures of the construction machine 1 and the movable arm member 3 are slightly changed. Since it can be expected that the entire embankment area E will be compacted by changing the number of times, work efficiency can be expected to improve.

Further, in the compaction plate 30 without the rotation support mechanism 40, in order to change the pressing position and the angle θ of the compaction plate 30, the construction machine 1 and the movable arm member 3 are temporarily separated from the compaction portion to change the posture. It is necessary to make small movements in front, back, left and right, such as re-approaching the compacted part in the changed posture and restarting the construction. For this reason, the surface of the cast RCD concrete may become rough and the construction quality may deteriorate. By using the compaction plate 30 provided with the rotation support mechanism 40, the construction machine 1 and the movable plate 30 can be moved when the pressing position and the angle θ of the compaction plate 30 are changed, for example, as shown in FIGS. Since it is not necessary to move the arm member 3 finely and slightly, it can be expected to avoid deterioration of the construction quality of the embankment area E of the complicated terrain.

FIG. 2C shows an example of a method of compacting the embankment area E adjacent to the rock convex portion R by using the compaction plate 30 supported by the rotation support mechanism 40. Hereinafter, the compaction method of the present invention will be described with reference to FIG. 2 (C). First, the plate-type compaction machine 1 of FIG. 1A is moved to the position of reference numeral 1a, and the compaction plate 30 at the tip of the movable arm member 3 is attached to the rock convex portion R to obtain the compaction plate 30. The pressing angle θ of the compaction plate 30 is changed so that one side (one end edge) is in contact with the rock convex portion R. Then, the vibration exciter 31 is activated to vibrate the positioned compaction plate 30 in the normal direction to compact the position directly below the compaction plate 30.

Next, the plate-type compaction machine 1 expands and contracts the movable arm member 3 as shown by the dotted line while maintaining the position of reference numeral 1a, and moves the position of the compaction plate 30 to an adjacent position along the circumference of the rock convex portion R. .. Next, by abutting the compaction plate 30 moved to the adjacent position against the bedrock convex portion R, the compaction plate 30 is pressed so that one side (one end edge) of the compaction plate 30 is in contact with the bedrock convex portion R. Change the angle θ. Then, the vibration exciter 31 is activated to compact the position directly below the compaction plate 30 positioned at the adjacent position. In this way, the plate-type compaction machine 1 can compact the compaction area E adjacent to the rock convex portion R within the reach of the movable arm member 3 without moving from the position of reference numeral 1a.

After the compaction within the reach of the movable arm member 3 is completed in reference numeral 1a, the plate type compaction machine 1 is moved to the position of reference numeral 1b. Then, by abutting the compaction plate 30 at the tip of the movable arm member 3 against the bedrock convex portion R, the compaction plate 30 is pushed so that one side (one end edge) of the compaction plate 30 is in contact with the bedrock convex portion R. Change the contact angle θ. Then, the vibration exciter 31 is activated to compact the position directly under the compaction plate 30.

Next, the plate-type compaction machine 1 expands and contracts the movable arm member 3 as shown by the dotted line while keeping the position of reference numeral 1b, and moves the position of the compaction plate 30 to an adjacent position along the circumference of the rock convex portion R. , The pressing angle θ of the compaction plate 30 is changed so that it comes into contact with the rock convex portion R by contacting the rock convex portion R, and the vibration exciter 31 is activated to directly under the compaction plate 30 positioned at an adjacent position. Compact. Even at the position of reference numeral 1b, the compaction area E adjacent to the rock convex portion R can be compacted within the reach of the movable arm member 3 without moving the plate type compaction machine 1.

Further, after the compaction within the reach of the movable arm member 3 is completed at reference numeral 1b, the plate type compaction machine 1 is sequentially moved to the positions of reference numerals 1c to 1e, and the plate type compaction machine 1 is moved at the moved positions 1c to 1e. 1 can compact the compaction area E adjacent to the rock convex portion R within the reach of the movable arm member 3 without moving it. In this way, by providing the rotation support mechanism 40 and rotatably supporting the compaction plate 30 around the normal axis P, the embankment area E adjacent to the rock convex portion R having a complicated topography can also be constructed. It is no longer necessary to change the posture (position and angle) of the machine 1 and the movable arm member 3 many times, and by changing the minimum number of times, it is possible to make a complicated terrain adjacent to the rock convex portion R in a short time. The embankment area E can be compacted without omission.

In the examples of FIGS. 2B and 2C, a method of changing the angle of the compaction plate 30 by pressing the edge of the compaction plate 30 against the wall surface W or the rock convex portion R has been described. The part to be pressed is not necessarily limited to the edge of the compaction plate 30, but any part of the compaction plate 30 is abutted (contacted) with the wall surface W, the rock convex portion R or the surface of the embankment area E. The pressing angle θ of the compaction plate 30 can be changed by the operation of the construction machine 1.

Further, in the embodiment of FIG. 2C in which the compaction area E adjacent to the rock convex portion R is compacted, a method of sequentially moving the plate type compaction machine 1 to the positions of reference numerals 1a to 1e and compacting the plate type compaction machine 1 has been described. However, in reality, the postures (positions and angles) of the construction machine 1 and the movable arm member 3 are appropriately moved in order to compact the entire area adjacent to the rock convex portion R. Even at that time, by providing the rotation support mechanism 40 to rotatably support the compaction plate 30, changes in the postures (positions and angles) of the construction machine 1 and the movable arm member 3 can be minimized. , The compaction quality can be improved by minimizing the change of the construction machine 1 and the movable arm member 3.

In the compaction attachment device 10 provided with the rotation support mechanism 40 as shown in the illustrated example, when the vibration support device 31 for vibrating the compaction plate 30 in the normal direction is provided, the rotation support mechanism 40 is based on the vibration support device 31. May affect vibration. Therefore, it is conceivable that the rotation support mechanism 40 includes a rotation lock mechanism (not shown) that temporarily stops the rotation of the compaction plate 30, and the influence on the vibration exciting device 31 is suppressed by temporarily stopping the rotation. However, as shown in FIGS. 1B and 1C, the vibrating device 31 is connected to the compaction plate 30, and the rotation support mechanism 40 is arranged between the joint 20 and the vibrating device 31 to rotate. The present inventor has been able to experimentally confirm that the vibration caused by the vibration generating device 31 is hardly affected by the rotation support mechanism 40 even if the locking mechanism or the like is not provided. That is, the compaction density of RCD concrete after compaction using the compaction attachment device 10 shown in FIGS. 1 (B) and 1 (C) and the conventional compaction attachment device 12 shown in FIG. 3 (B) are used. When an experiment was conducted to compare the compaction density of RCD concrete after compaction, both were almost the same density.

Further, in the compaction attachment device 10 provided with the rotation support mechanism 40, a rotation drive device (not shown) that drives the rotation of the compaction plate 30 can also be included. For example, a power source that drives the rotation of the compaction plate 30 around the normal axis P, and a control mechanism that controls the rotation angle of the compaction plate 30 in response to a signal input from the driver's seat 4 of the construction machine 1, for example. The rotary drive device including the above is mounted on the compaction attachment device 10. However, if the rotation support mechanism 40 shown in FIGS. 1B and 1C is used, any part of the compaction plate 30 can be formed on the wall surface W, the bedrock convex portion R, or the embankment without providing a rotation drive device or the like. The rotation angle θ around the normal axis P of the compaction plate 30 due to the operation of the construction machine 1 that abuts (contacts) the surface of the area E (bending operation of the movable arm member 3, turning operation of the swivel table 2, etc.). It was possible to experimentally confirm that the value can be changed.

According to the present invention, the pressing position and the angle θ of the compaction plate 30 against the embankment area E can be arbitrarily changed independently of the postures of the construction machine 1 and the movable arm member 3, so that the wall surfaces W1 and W2 Even in the embankment area E surrounded by, the entire embankment area E can be reliably compacted without generating a compaction impossible area D. In addition, even in the embankment area E where the terrain is complicated and adjacent to the bedrock convex portion R such as a riverbed or an abutment, it is possible to compact the construction machine 1 and the movable arm member 3 without changing the postures many times. Therefore, improvement of work efficiency and improvement of construction quality can be expected. Moreover, the density of the compaction area E after compaction is about the same as that of the conventional one, and it is possible to efficiently compact the compaction area E in a short time as compared with the conventional compaction work.

In this way, it is possible to achieve the object of the present invention, "a method and a compaction attachment device capable of efficiently compacting even in an embankment area adjacent to a wall surface or a rock convex portion" without generating a compaction impossible area. can.

Although the present invention has been described above with reference to the construction site of the RCD method in a concrete dam, the application of the present invention is not limited to the RCD method, and the present invention is applied to compaction work in general construction work. It is also possible to do. Recently, when constructing civil engineering structures such as dams, embankments, and roads, the ground materials (earth and sand and crushing materials) procured at the collection sites such as the ground near the site are used as the materials for civil engineering structures (CSG). : A construction method (CSG construction method) used as a Cemented Sand and Gravel) has been developed. Sometimes. The present invention can be effectively applied to such a CSG method. For example, by applying the present invention to the embankment area E of CSG adjacent to a wall surface or a rock convex portion, the above-mentioned effect of the present invention can be obtained. It can be expected to be achieved.

1 ... Construction machine 2 ... Swing table 2a ... Moving part (caterpillar) 2b ... Counter weight 3 ... Movable arm member 4 ... Driver's seat 5 ... Boom 5a ... Boom drive cylinder 5b ... Joint 6 ... Arm 6a ... Arm drive cylinder 6b ... Joint 7 ... Attachment drive mechanism 7a ... Drive cylinder 7b, 7c ... Rod 7d ... Joint 10 ... Compaction attachment 12 ... Compaction attachment 20 ... Joint 21a, 21b ... Bracket 22, 23 ... Support pin 30 ... Compaction plate 30a ... Pressing surface 31 ... Vibration device 34 ... Housing 35 ... Connecting plates 36, 37 ... Holding plates 38a, 38b ... Elastic bearings 40 ... Rotational bearing mechanism 41 ... Rotating shaft 41a ... Stopper for preventing slipping out 42 ... Rotating shaft base 43 ... Bearing portion 43a ... Rotation angle limiting stopper 44 ... Bearing base E ... Filling area S ... Filling material W ... Wall surface R ... Bedrock convex part D ... Uncompacted area O ... Swing table center P ... Normal direction axis (compacting plate) Center of rotation)

Claims (3)

When compacting the filling area adjacent to the wall surface or the convex part of the bedrock, the compaction plate is vibrated in the normal direction on the side opposite to the pressing surface of the flat compaction plate pressed against the surface of the filling area. The device is connected, and the vibration device is attached to the tip of the movable arm member of a construction machine with a movable arm member via a rotation support mechanism that rotatably supports the compaction plate around the normal axis. rotation support mechanism including a rotational angle limiting stopper for limiting the rotation angle of the compaction plate in the range of -180 ° to 180 °, while the cable of the exciter device can be prevented from entangled to the rotation supporting mechanism, the clamping A filling plate formed by abutting any part of the compaction plate against the wall surface or the convex portion of the bedrock and applying a force to the compaction plate in a direction intersecting the normal axis to rotate the compaction plate to compact the filling area. How to compact the area. A joint connected to the tip of the movable arm member of a construction machine with a movable arm member, a flat compaction plate pressed against the surface of the compaction area to be compacted, and a pressing surface of the compaction plate against the filling area. A vibration device that is connected to the opposite side and vibrates the compaction plate in the normal direction, and a compaction plate that is interposed between the joint and the vibration device so that the compaction plate can rotate around the axis in the normal direction. It is equipped with a rotation support mechanism to support, and the rotation support mechanism includes a rotation angle limiting stopper that limits the rotation angle of the compaction plate within the range of -180 ° to 180 °, and the filling area adjacent to the wall surface or the rock convex part is provided. At the time of compaction, while preventing the cable of the vibration device from being entangled with the rotation support mechanism, any part of the compaction plate is abutted against the wall surface or the convex portion of the bedrock to the compaction plate in the normal direction axis. A compaction attachment device that compacts the filling area by rotating the compaction plate by applying a force in the direction that intersects with. In the device of claim 2 , the rotary support mechanism includes a rotary shaft in the normal direction of the compaction plate and a bearing portion that rotatably supports the other end of the rotary shaft, and the rotary shaft is connected to the exciting device. Tightening that can be fixed to a plate and the bearing portion to the bottom surface of the joint portion, or the rotating shaft can be fixed to the bottom surface of the joint portion and the bearing portion can be fixed to the connecting plate of the vibration exciter. Hardening attachment device.

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