JP7715383B2 - Slope crushed stone laying structure and slope protection structure - Google Patents

Description

The present invention relates to a crushed stone laying structure for slopes and a slope protection structure.

When constructing a slope protection structure, such as a cladding block construction method, the slope is first shaped and then crushed stone is laid on top of it. Such crushed stone laying structures and slope protection structures are well known, as disclosed in Patent Document 1 (JP 7-138969 A) and Patent Document 2 (JP Patent No. 5,449,295 A).

Japanese Unexamined Patent Publication No. 7-138969 Patent No. 5449295

In the configurations disclosed in Patent Documents 1 and 2, the slope of the slope is gentle, so crushed stone can be laid appropriately on the slope. However, when the slope is steeper, at 15% or more, the crushed stone laid on the slope cannot maintain a uniform layer thickness due to the action of gravity, which is an issue.

The present invention therefore aims to provide a slope crushed stone laying structure and slope protection structure that makes it possible to lay crushed stone in a uniform layer thickness on a slope, even on a steep slope.

In other words, the present invention is a slope crushed stone laying structure characterized by comprising a group of partition blocks arranged in the slope length direction of a slope, the group of partition blocks being arranged at a required interval in a direction perpendicular to the slope length direction within the same plane as the slope, a covering body arranged across each of the upper surfaces of the partition block rows, and crushed stone filled in the area surrounded by the slope , the group of partition block rows and the covering body, the partition blocks being fixed to the slope with anchor pins for partition blocks, and the covering body being fixed to the slope with anchor pins for covering body .

This makes it possible to lay crushed stone in a uniform layer thickness on slopes, even on steep slopes.

Furthermore, it is preferable that the sectional blocks are formed in a rectangular parallelepiped shape, and that both ends of the upper surface in the vertical direction are formed with connector mounting recesses for arranging connectors that connect adjacent sectional blocks, and insertion holes for the sectional block anchor pins, that the connector mounting recesses have connector mounting fasteners embedded therein for securing the connectors, and that the upper surface of the sectional block is further formed in the middle in the vertical direction with mounting recesses for the cover anchor pins across the width.

This makes it possible to lay crushed stone in a uniform layer thickness on the slope in a more stable manner, even on steep slopes.

Furthermore, it is preferable that the partition blocks be made of porous concrete that has higher permeability than the portion filled with crushed stone.

This means that even if the crushed stone laying area contains dividing blocks other than crushed stone, it will not reduce permeability and will prevent a decrease in the functionality of the crushed stone layer.

Another slope protection structure invention features a foundation placed at the foot of the slope; a group of segmental block rows, each consisting of a plurality of segmental blocks arranged in the slope length direction of the slope, arranged at a required interval in a direction perpendicular to the slope length direction within the same plane as the slope; a covering body placed across the top surfaces of each of the segmental block rows; and crushed stone filled in the area surrounded by the slope, the segmental block row group, and the covering body, with the position at which the segmental block rows are arranged aligned with the position of the legs of slope protection blocks arranged starting from the foundation, and the legs of the slope protection blocks placed via the covering body on the top surface of the segmental block row.

This makes it possible to construct slope protection structures with crushed stone laid in uniform layers on steep slopes.

It is also preferable that the division blocks are fixed to the slope with division block anchor pins, and the covering body is fixed to the slope with covering body anchor pins.

Furthermore, the sectional blocks are formed in a rectangular parallelepiped shape, and at both ends of the top surface in the vertical direction, connector mounting recesses for arranging connectors that connect adjacent sectional blocks and insertion holes for the sectional block anchor pins are formed, connector mounting fasteners for fixing the connectors are embedded in the connector mounting recesses, and more preferably, mounting recesses for the cover anchor pins are formed across the width in the middle part of the top surface in the vertical direction of the sectional block.

This makes it possible to construct slope protection structures with crushed stone laid in uniform layers on the slope in a more stable manner, even on steep slopes.

Furthermore, it is preferable that the partition blocks be made of porous concrete that has higher permeability than the portion filled with crushed stone.

This means that even if the crushed stone laying area contains dividing blocks made of materials other than crushed stone, the permeability will not be reduced and the functionality of the crushed stone layer will not be reduced.

The configuration of the crushed stone laying structure and slope protection structure of this invention makes it possible to construct a crushed stone laying structure and slope protection structure that allows crushed stone to be laid in a uniform layer thickness on a slope, even on a steep slope.

1A and 1B are a plan view, a cross-sectional view taken along line AA, a cross-sectional view taken along line BB, and a front view of an anchor pin for a cover and an anchor pin for a partition block, respectively, of a partition block used in this embodiment. 1 is a side cross-sectional view showing an example of a procedure for constructing a slope protection block in this embodiment. FIG. FIG. 3 is a side cross-sectional view continuing from FIG. 2 . FIG. 4 is a front view of the direction of arrow IV in FIG. 3 . FIG. 4 is a side cross-sectional view continuing from FIG. 3 . FIG. 6 is a side cross-sectional view continuing from FIG. 5 . 6 is a view equivalent to FIG. 4. FIG. 7 is a side cross-sectional view continuing from FIG. 6. FIG. 9 is a side cross-sectional view continuing from FIG. 8 . 9 is a view equivalent to FIG. 4. FIG. 10 is a side cross-sectional view continuing from FIG. 9 . FIG. 12 is a side cross-sectional view continuing from FIG. 11 . 12 is a view equivalent to FIG. 4.

The specific configuration of the slope crushed stone laying structure 100 and the slope protection structure 200 using the same according to the present invention will be explained below with reference to the drawings.

Figure 1 shows a plan view, an A-A cross-sectional view, and a B-B cross-sectional view of a sectional block arranged in the vertical direction of slope N, as well as a front view of a sectional block anchor pin 20 and a covering body anchor pin 30. The sectional block 10 is a rectangular parallelepiped made of porous concrete with higher permeability than the crushed stone 70 layer described below. Connector attachment recesses 12 are provided at both ends of the top surface in the vertical direction (both ends in the vertical direction in Figure 1). The connector attachment recesses 12 are embedded with female threads 13 serving as connector attachment fasteners for securing connectors 50 that connect adjacent sectional blocks 10, and are drilled with insertion holes 14 for inserting the sectional block anchor pins 20. Two attachment recesses 16 are provided in the middle of the sectional block 10 in the vertical direction for attaching covering body anchor pins 30. The mounting recess 16 is arranged across the width of the section block 10, and its inner width gradually narrows toward the bottom.

As shown in Figure 1, the anchor pin 20 for the segment block is formed as a straight anchor pin. The anchor pin 30 for the cover is formed as an inverted U-shape when viewed from the front. The inner width dimension of the anchor pin 30 for the cover is equal to the width dimension of the segment block 10, and its height dimension is greater than the height dimension of the segment block 10. The anchor pin 30 for the cover is attached to the mounting recess 16 in a position that sandwiches the segment block 10, and the required length range of its tip is inserted into the slope N. The outer diameter dimension of the anchor pin 30 for the cover is formed to be smaller than the depth dimension of the mounting recess 16.

Next, the construction procedure for the crushed stone laying structure 100 for slope protection structure 200 using the same according to this embodiment will be described with reference to Figures 2 to 13. First, as shown in Figure 2, workers shape the slope N and then lay the foundations 40 for the slope protection blocks 110 at the designated location on the slope's toe side. Next, as shown in Figures 3 and 4, workers lay multiple sectional blocks 10 longitudinally along the slope length of the slope N. Adjacent sectional blocks 10 are connected by placing connectors 50 consisting of connecting plates 52 and connecting bolts 54 in the connector mounting recesses 12 and threading the connecting bolts 54 into the female threads 13. Furthermore, workers insert a sectional block anchor pin 20 into the insertion hole 14 of the sectional block 10 closest to the slope's toe and insert the required length of the tip of the sectional block anchor pin 20 into the slope N, thereby securing the sectional block 10 closest to the slope N as shown in Figure 5.

In this way, a plurality of sectional blocks 10 fixed along the slope length direction of the slope N form a sectional block row 17, and a sectional block row group 18 is constructed by arranging a plurality of sectional block rows 17 at required intervals in a direction perpendicular to the slope length direction within the same plane of the slope N. In this embodiment, the sectional block rows 17 are arranged in alignment with the positions of the legs 112 in the width direction (depth direction in the drawing) of the slope protection blocks 110.

Next, as shown in Figures 6 and 7, the worker lays a civil engineering sheet 60 as a covering over each of the sectional block rows 17 that make up the sectional block row group 18. As shown in Figure 6, the civil engineering sheet 60 also spans between the sectional block 10 located closest to the foot of the slope and the upright surface of the foundation 40 on the slope N side, and is also secured to the upright surface on the slope N side of the foundation 40 with concrete nails or the like. Next, the worker sets the covering anchor pins 30 in the mounting recesses 16 of each sectional block 10 from the top side of the civil engineering sheet 60, inserting the required length of the tip of the covering anchor pin 30 into the slope N. Because the depth of the mounting recesses 16 is deeper than the outer dimensions of the covering anchor pins 30, the covering anchor pins 30 will not protrude from the top opening of the mounting recesses 16. In this way, the area surrounded by the slope N, the sectional block row group 18, and the civil engineering sheet 60 is formed as a crushed stone filling space.

Next, as shown in Figure 8, workers pour crushed stone 70 into the opening on the toe side of the crushed stone filling space as backfill material. The crushed stone filling space has open surfaces at both ends along the slope length, but because a foundation 40 is located on the extension of the opening on the toe side of the slope, the poured crushed stone 70 is blocked by the foundation 40, allowing the crushed stone 70 to be filled. Furthermore, because the crushed stone filling space is connected to the space surrounded by the original ground, foundation 40, and civil engineering sheet 60, this area is also filled with crushed stone 70. Because the top surface of the open space parallel to the slope N is covered by the civil engineering sheet 60, the top surface height of the crushed stone 70 is regulated by the civil engineering sheet 60, allowing the construction of a slope crushed stone laying structure 100 in which crushed stone 70 is laid at a uniform thickness on the slope N.

Next, as shown in Figures 9 and 10, workers lay slope protection blocks 110 on top of the slope crushed stone laying structure 100, starting from the foundation 40. As mentioned above, the widthwise placement positions of the legs 112 of the slope protection blocks 110 are aligned with the placement positions of the segmental block rows 17, so the slope protection blocks 110 are laid on top of the segmental block rows 17 via the civil engineering sheet 60. This allows the slope protection blocks 110 to be laid on top of the slope crushed stone laying structure 100 in an extremely stable state. Next, as shown in Figure 11, workers fill the gap between the slope crushed stone laying structure 100 and the slope protection blocks 110 with ready-mixed concrete 120, thereby fixing the slope protection blocks 110 to the slope crushed stone laying structure 100.

Next, as shown in Figures 12 and 13, workers can construct a slope protection structure 200 in which slope protection blocks 110 are laid across the entire slope N by repeatedly laying slope protection blocks 110 and filling with ready-mixed concrete 120 along the slope length direction of the slope N.

The crushed stone laying structure 100 of this embodiment and the slope protection structure 200 using it allow crushed stone 70 to be laid at a uniform thickness even on steep slopes N. This makes it easy to place slope protection blocks 110 on top of the crushed stone 70 and to build foundation concrete (not shown), which is advantageous in that it allows the construction of structures in accordance with the design specifications.

In addition, in this embodiment, only the segment blocks 10 at the position closest to the foot of the slope are fixed to the slope N by the segment block anchor pins 20, but this is not limited to this configuration. Depending on the conditions of the slope N, such as the gradient, and the weight of the slope protection block 110 to be placed, segment blocks 10 within a required range on the foot of the slope or all segment blocks 10 can be fixed to the slope N by the segment block anchor pins 20.

In addition, in this embodiment, the crushed stone 70 of the slope crushed stone laying structure 100 is described as being used as backfill material for the slope protection blocks 110, but the crushed stone 70 is not limited to being used as backfill material, and it is also envisioned that it may be used as part of a foundation or in other ways.

In addition, while this embodiment illustrates an example in which the positions of the legs 112 of the slope protection block 110 are aligned with the positions of the partition block row 17, this is not a limitation. The positions of all legs 112 of the slope protection block 110 do not need to correspond to the partition block row 17; it is sufficient that at least two legs 112 of one slope protection block 110 are placed on the partition block row 17 via the civil engineering sheet 60.

Furthermore, the configuration of this embodiment described above may be appropriately combined with any of the modifications described in the specification or other known configurations.

10: Division block 12: Connector mounting recess 13: Female thread portion 14: Insertion hole 16: Mounting recess
17: row of partition blocks, 18: group of row of partition blocks, 20: anchor pin for partition blocks, 30: anchor pin for covering body, 40: foundation, 50: connector, 52: connecting plate, 54: connecting bolt, 60: civil engineering sheet (covering body)
70: Crushed stone 100: Slope crushed stone laying structure 110: Slope protection block 112: Leg 120: Ready-mixed concrete 200: Slope protection structure N: Slope

Claims (7)

a group of sectional block rows, each row consisting of a plurality of sectional blocks arranged in the slope length direction of a slope, arranged at predetermined intervals in a direction perpendicular to the slope length direction within the same plane as the slope;
a covering body disposed across each of the upper surfaces of the row of partition blocks;
The area surrounded by the slope, the group of division block rows, and the covering body is filled with crushed stone ,
The segment blocks are fixed to the slope by segment block anchor pins,
A crushed stone laying structure for a slope, characterized in that the covering body is fixed to the slope by a covering body anchor pin . The sectional blocks are formed in a rectangular parallelepiped shape, and at both ends of the top surface in the direction of the vertical length, there are formed connector mounting recesses for arranging connectors that connect adjacent sectional blocks together, and insertion holes for the sectional block anchor pins,
A fastener for attaching a connector for fixing the connector is embedded in the connector attachment recess,
2. A crushed stone laying structure for slopes according to claim 1 , characterized in that a recess for mounting the anchor pin for the covering body is formed across the width in the middle part of the slope length direction of the upper surface of the partition block. 3. A crushed stone slope laying structure according to claim 1 , wherein the partition blocks are made of porous concrete having a higher permeability than the portion filled with crushed stone. a foundation disposed on the toe side of the slope;
a group of sectional block rows, each row consisting of a plurality of sectional blocks arranged in the slope length direction of the slope, arranged at predetermined intervals in a direction perpendicular to the slope length direction within the same plane as the slope;
a covering body disposed across each of the upper surfaces of the row of partition blocks;
The area surrounded by the slope, the group of division block rows, and the covering body is filled with crushed stone,
A slope protection structure characterized in that the position at which the row of partition blocks is arranged is aligned with the position of the legs of the slope protection blocks arranged starting from the foundation, and the legs of the slope protection blocks are placed on the upper surface of the row of partition blocks via the covering body. The segment blocks are fixed to the slope by segment block anchor pins,
5. The slope protection structure according to claim 4 , wherein the covering body is fixed to the slope by a covering body anchor pin. The sectional blocks are formed in a rectangular parallelepiped shape, and at both ends of the top surface in the direction of the vertical length, there are formed connector mounting recesses for arranging connectors that connect adjacent sectional blocks together, and insertion holes for the sectional block anchor pins,
A fastener for attaching a connector for fixing the connector is embedded in the connector attachment recess,
6. The slope protection structure according to claim 5 , wherein a recess for mounting the anchor pin for the cover is formed across the width of the upper surface of the partition block in the middle portion in the slope length direction. A slope protection structure as described in any one of claims 4 to 6 , characterized in that the partition blocks are made of porous concrete having a higher permeability than the permeability of the portion filled with crushed stone.