JP5283493B2 - Paving material compaction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compacting method leaving no compaction impossible part even if there exists a stepped structure in a construction zone. <P>SOLUTION: A stepped plate 1 having a bottom face as a compaction surface includes a base with a thickness not smaller than a height from the upper face P2 of a paving material to the upper face of the stepped structure, and a downward slope extended from the base. The stepped plate 1 is disposed in a paving material portion which becomes the compaction impossible part adjacent to the stepped structure J so that the end face of the base abuts on the side of the stepped structure J. The paving material at a lower part is compacted through the stepped plate 1 when a rolling pressure roller straddles the stepped plate 1. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a technique for compacting paving materials such as a spread asphalt mixture and concrete.

  A self-propelled compacting machine such as a road roller is used for compacting the asphalt mixture spread on the roadbed or bridge deck. At that time, for example, when an existing step structure exists in the construction section, such as an expansion / contraction device (joint) between bridge girders in a bridge, a portion that cannot be compacted is generated at a position adjacent to the step structure. That is, as shown in FIG. 6, when the expansion and contraction device extends in the width direction on the floor slab during the paving work of the bridge, the road roller that is progressing while compacting the asphalt mixture spread as a base layer When the rolling roller passes over the expansion / contraction device, a portion where the compaction roller cannot contact is inevitably generated at the corner portion of the asphalt mixture adjacent to the expansion / contraction device.

  For such places where compaction is impossible, after the construction by the load roller is finished, a separate compaction construction is performed with a vibration compactor or the like (for example, Patent Document 1).

Japanese Utility Model Publication No. 05-040308

  In the above conventional method, the number of times that the vibration compactor is applied must be considerably increased in order to compact a portion that cannot be compacted to the same extent as a compacted portion by a load roller other than the portion. In addition, after applying the road roller once, it is necessary to perform another construction by manpower or an apparatus such as Patent Document 1, so that work efficiency is not good.

  The present invention pays attention to this point, and proposes a compaction method that does not leave a portion that cannot be compacted even when there is a step structure in the construction section.

  The pavement compaction method proposed here to solve the above problems is a pavement compaction method in which the pavement material spread over the construction section where the step structure exists is compacted with a rolling roller. And a base portion having a thickness equal to or higher than the height from the upper surface of the pavement material to the upper surface of the stepped structure, and a slope portion of a downhill extending from the base portion, and the bottom surface is a compacted surface A step plate is disposed on the pavement portion adjacent to the step structure so that the end face of the base is in contact with the side portion of the step structure, and the compaction roller is disposed on the pavement portion. The pavement material below is compacted through the step plate when getting over the step plate.

  According to the paving material compaction method according to this proposal, the step plate can be preliminarily applied to a portion where compaction is impossible, and the portion can be compacted with a rolling roller. In other words, even if there is a step structure in the construction section, the rolling roller can be applied without leaving a place where it cannot be compacted, so there is no need for separate construction using a vibration compactor, etc., as in the conventional construction method, improving work efficiency. To do.

  1 and 2 show a first embodiment of a step plate used in a paving material compaction method. The illustrated step plate 1 is an example used when a telescopic device J is already provided as a step structure in a construction section, and is disposed in contact with a side portion of the telescopic device J. The telescopic device J is, for example, a finger joint provided between the bridge girders of the bridge, and extends in the width direction of the bridge. In addition, although an example in which the expansion and contraction device is already installed in the construction section is shown here as a step structure, in addition, for example, when re-paving after cutting off a part of the existing asphalt pavement and performing work such as water pipe embedding The present invention is also applicable to a step generated by cutting existing asphalt pavement or the like (in this case, the remaining pavement becomes a stepped structure).

  In the step plate 1, the thickness h of the base 1a is set to be equal to or higher than the height from the upper surface P1 of the paving material spread as a base layer to the upper surface P2 of the expansion device J as shown in FIG. By setting the thickness h to such a size, the rolling roller over the expansion device J does not collide with the corners of the expansion device J, so that it is possible to prevent fouling, breakage, and noise generation. A downhill slope portion 1b extends from the base portion 1a. In this embodiment, the slope portion 1b starts immediately from the end surface of the base portion 1a. The width w of the step plate 1 in the width direction is the same for both the base portion 1a and the slope portion 1b, and is formed at a width that allows at least one or more rolling rollers provided in the load roller to pass at a time. However, the present invention is not limited to this, and a plurality of step plates 1 having a short width w may be connected in the width direction to pass the rolling roller.

  The step plate 1 according to the first embodiment has a right-angled triangular cross section when viewed from the width direction, that is, the width direction. The right triangle is formed so that the ratio between the length d of the base and the thickness (height) h falls within the range of d: h = 5: 1 to 20: 1. If the length d of the base is shorter than this, the slope becomes too short, so that the level difference is not eliminated and a portion that cannot be compacted remains. Moreover, if the length d of the base is longer than this, the tip of the slope portion 1b becomes thin and brittle, which is not preferable.

  The bottom surface 1c of the step plate 1 including the bottom of the right triangle is a flat compact surface and is in close contact with the pavement material surface P1. In the case of this embodiment, since the pavement material surface P1 is flat, the bottom surface 1c is a flat surface. However, the surface is not limited to be flat. If the pavement material surface is not flat, it can be shaped according to this. .

  Such a step plate 1 is disposed such that the end surface of the base 1a is in contact with the side of the expansion device J. As a result, the bottom surface 1c, which is a compaction surface, is in close contact with the portion where the compaction is not possible, which is the corner portion of the pavement material adjacent to the expansion device J. Therefore, when the rolling roller gets over the step plate 1, the pressure is applied to the lower pavement material via the step plate 1, and the pavement material at that location is compacted in the same manner as the other locations. That is, the compaction can be performed with the rolling roller without leaving a portion where the compaction is impossible.

  FIG. 3 shows two modified examples of the step plate 1 in a cross section in the width direction. In the embodiment shown in FIG. 3A, a base portion 1a having a horizontally long cross section is formed, and a downhill slope portion 1b is extended from the base portion 1a having the thickness h. That is, in this example, the base 1a is formed with a predetermined length in the traveling direction of the rolling roller. In this case, the base portion 1a is formed so that the slope portion 1b is not inclined so that a portion that cannot be compacted is formed. On the other hand, in the embodiment of FIG. 3B, a plurality of (in the illustrated example, five sheets) having a plate thickness thinner than the height from the pavement material upper surface P1 to the telescopic device upper surface P2 and different lengths d in the traveling direction of the rolling roller ) Of the flat plate members 2 to 6 are stacked in the vertical direction to have a thickness h. The illustrated flat plate members 2 to 6 have a thickness per sheet of h / 5 and are stacked from the bottom to the top in the order of a long length d, that is, a flat surface. And since each flat plate member 2-6 has accumulated the end surface side which contact | connects the side part of the expansion-contraction apparatus J so that it may form the end surface of the base 1a, the step-like slope part 1b is formed in the opposite side. Is done. In addition, the width w of the width direction of each flat plate member 2-6 is the same.

  FIG. 4 shows an embodiment of the step plate 1 suitable when the telescopic device J is disposed obliquely with respect to the width direction (with respect to the traveling direction of the vehicle) when viewed from above. . When the step plate 1 as in the first embodiment is used in the construction section in which the expansion device J is inclined, the step plate 1 is also disposed obliquely along the expansion device J. On the other hand, since the compaction roller travels along the traveling direction of the vehicle, that is, in the direction orthogonal to the width direction, when the step plate 1 is disposed obliquely, the compaction roller is stepped from one side thereof. The user starts riding on the slope portion 1b of the plate 1 and rides up while tilting. It is not preferable for the finishing accuracy to tilt the rolling roller with respect to the surface of the pavement, so this situation should be avoided if possible. Therefore, in the construction section where the telescopic device J is inclined, the step plate 1 having the base 1a formed obliquely as shown in FIG. 4 is used.

  That is, the base portion 1a of the step plate 1 of the present embodiment is formed so as to become longer in the direction of travel of the rolling roller from one side to the other side, and forms a right triangle when viewed from above. It is formed as follows. Thereby, when the end surface of the base portion 1a is inclined with respect to the width direction and the end surface is brought into contact with the side portion of the expansion device J, the slope portion 1b has the width direction parallel to the width direction and Orthogonal to the direction of travel. Therefore, the rolling roller can ride on the step plate 1 without tilting.

  FIG. 5 shows an embodiment of the step plate 1 that can be used when a circular step structure such as a manhole is in the construction section. The base 1a of the step plate 1 of this embodiment has a predetermined length in the traveling direction of the rolling plate, and has a semicircular shape when viewed from above by denting the end surface along the outer shape of the manhole. A recess 1d is formed. If the two step plates 1 are arranged so that the concave portion 1d is brought into contact with the side portion of the manhole and sandwiched from both sides of the manhole, it is possible to prevent the occurrence of a portion that cannot be compacted around the entire manhole.

  The step plate 1 of each embodiment as described above can be made of iron, but is preferably made of wood or resin (natural resin or synthetic resin) because the arrangement / removal operation is facilitated.

The perspective view which showed the level | step difference plate of 1st Embodiment. Sectional drawing which showed the level | step difference plate of 1st Embodiment arrange | positioned in the construction area. Sectional drawing which showed the level | step difference plate of 2nd and 3rd embodiment. The perspective view which showed the level | step difference plate of 4th Embodiment. The perspective view which showed the level | step difference plate of 5th Embodiment. The figure explaining the location which cannot be compacted adjacent to the expansion-contraction apparatus on a bridge.

Explanation of symbols

1 Step plate 1a Base portion 1b Slope portion 1c Bottom surface (compact surface)

Claims (4)

A pavement material compaction method in which a pavement material spread on a construction section where a step structure exists is compacted with a rolling roller,
A step plate having a base portion having a thickness equal to or higher than a height from the upper surface of the pavement material to the upper surface of the step structure, and a downhill slope portion extending from the base portion, and having a bottom surface as a compacted surface The
An end surface of the base is in contact with a side portion of the step structure, and is disposed on a portion of the pavement material that becomes a non-consolidated portion adjacent to the step structure,
A method for compacting a pavement material, characterized in that when the rolling roller gets over the step plate, the pavement material below is compacted through the step plate. The step plate is
The ratio of the length of the base and the thickness (the length of the base: thickness) in the cross-sectional shape viewed from the side with respect to the rolling roller traveling direction is in the range of 5: 1 to 20: 1. The method for compacting a paving material according to claim 1. The step plate is
A plurality of flat plate members having a plate thickness thinner than the height from the upper surface of the pavement material to the upper surface of the step structure and different lengths in the rolling roller traveling direction,
The method for compacting a pavement according to claim 1 or 2, wherein the rolling roller is formed by stacking from the bottom to the top in order from the longest in the traveling direction.   The method for compacting a pavement material according to any one of claims 1 to 3, wherein the step plate is made of wood or resin.

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