JPH0765314B2 - Steep embankment with vertical gutter drainage and wall and wall unit used for it - Google Patents

Description

Description: “Industrial application field” The present invention relates to a steep slope embankment having a substantially vertically standing wall portion and a vertical gutter drainage hole in the wall portion, and a wall body used therefor and It concerns a wall unit.

“Conventional technology” Recently, especially in high embankments, there is a tendency to make the wall of the embankment steep in order to effectively utilize the limited site.
As a steep slope embankment with such steep walls,
For example, the ones shown in FIGS. 11 and 12 are known.

This steep slope embankment has a wall portion H which is erected on an end portion of the embankment M formed on the substantially horizontal ground L in a state where a plurality of wall surface units 1 are joined at the end portions, and The end portion of the geotextile 2 embedded in the embankment material 3 that is filled behind the wall portion H in a substantially horizontal state has a wall portion H side end portion provided inside the embankment M of the wall portion H. It is embedded in the fixing portion 4 made of a self-hardening connecting material such as the above and fixed to the wall portion H.

In the wall portion H, the foundation 5 is formed by excavating the ground L and pouring in-situ concrete, and the in-situ concrete is placed on the end of the foundation 5 to form the side frame 40 of the wall portion H. In addition to being formed, the plurality of wall surface units 1 are erected on the foundation 5 in a state where adjacent end portions of the wall surface units 1 are in close contact with each other, and the upper and lower wall surface units 1 are arranged in a zigzag manner, and the upper and lower wall units are vertically and horizontally arranged. The wall unit 1 is joined. And, on each wall unit 1 at the uppermost part of the wall portion H, cast-in-place concrete is cast to form a road shoulder 41 having a gentle slope corresponding to the slope of the embankment M, and the road shoulder 41 has a guardrail. G is attached.

Further, each wall unit 1 is formed with a transverse drain hole 10 for draining water, which penetrates in the thickness direction of the wall unit 1, and through this transverse drain hole 10, rainwater accumulated in the embankment M, etc. Is drained to the outer wall side.

[Problems to be Solved by the Invention] However, in the embankment having the wall portion H provided with the transverse drainage holes 10 as described above, the water accumulated in the embankment M becomes
Since the water in the embankment M is reliably drained from the wall directly to the outer surface of the wall portion, the outer wall surface under each transverse drainage hole 10 is contaminated by the earth and sand contained in the drainage. If such dirty water is drained from the upper transverse drainage hole 10, there is a problem that the aesthetics of the outer wall will be impaired.
If the amount of water discharged from the transverse drainage hole 10 (the amount of discharged water) is large, there is a possibility that the facilities and passersby below it may be adversely affected or damaged.

The present invention has been made in view of the above circumstances, and it is possible not only to reliably discharge the water in the embankment but also to suppress the drainage directly discharged from the upper transverse drainage hole to the outer wall surface side as much as possible. An object of the present invention is to provide a steep slope embankment having a vertical gutter drainage hole, a wall body and a wall surface unit used therefor.

"Means for Solving the Problem" The steep slope embankment of the present invention has an end portion of a geotextile in which an embankment material is laid behind a wall portion which is erected substantially vertically, and which is laid in a substantially horizontal state in the embankment material. Is a steep slope embankment fixed to the wall portion, a plurality of transverse drainage holes penetrating in the transverse direction of the wall portion are formed, and a vertical gutter drainage hole communicating the upper and lower transverse drainage holes is formed. It is formed so as to penetrate the inside of the wall portion.

Further, the wall body used for the steep slope embankment of the present invention constitutes a wall portion which is erected substantially vertically, and a plurality of transverse drainage holes penetrating in the transverse direction are continuously provided in the vertical direction, A vertical gutter drainage hole which communicates with all the transverse drainage holes is formed so as to penetrate the inside thereof.

The wall unit used for the steep slope embankment of the present invention is
It is a substantially plate-shaped wall unit, and a plurality of walls are connected to each other by joining at the ends thereof to form a wall portion of the embankment that is erected, and two upper and lower horizontal end portions are connected to each other by the upper and lower connections. A pair of transverse drainage grooves are formed as transverse drainage holes, and a vertical gutter drainage hole that connects the upper and lower transverse drainage grooves is formed so as to penetrate therethrough.

Further, the wall unit used for another steep embankment of the present invention is a substantially plate-shaped wall unit, and a plurality of wall parts of the embankment are erected to be erected by joining at the ends thereof, In addition, at the four corners, horizontal drainage grooves are formed as horizontal drainage holes in groups of four by connecting up, down, left and right, and at the respective left and right vertical end portions, by connecting left and right, there are two pairs. A vertical drain is formed as a vertical gutter drainage hole.

[Operation] In the present invention, an embankment material is laid behind a wall portion that is erected substantially vertically, and the end of the geotextile laid in a substantially horizontal state in the embankment material is fixed to the wall portion. In constructing the sloped embankment, the wall portion or wall unit as described below is used to form the wall portion, thereby forming a plurality of transverse drainage holes penetrating in the transverse direction of the wall portion and in each of the upper and lower traverses. A vertical gutter drainage hole communicating with the drainage hole is formed by penetrating the inside of the wall portion.

The wall body constitutes a wall portion which is erected substantially vertically, and a plurality of transverse drainage holes penetrating in the transverse direction thereof are continuously provided in the vertical direction, and the vertical drainage holes communicating all of the upper and lower transverse drainage holes. The gutter drainage hole is formed so as to penetrate the inside thereof.

Further, the wall unit is a substantially plate-shaped wall unit, constituting a wall portion of the embankment that is erected by connecting a plurality by the end of the wall unit, and at the upper and lower horizontal end, The vertical drainage holes that connect the upper and lower horizontal drainage channels are formed through the interior of the vertical horizontal drainage channels, which are formed by connecting the upper and lower horizontal drainage holes in pairs. It is a thing.

Further, the other wall unit is a substantially plate-shaped wall unit, which constitutes a wall portion of the embankment that is erected by joining a plurality of the wall units by joining at the ends thereof, and at the four corners of the wall unit. The horizontal drainage grooves are formed as a horizontal drainage hole in groups of four by connecting with each other, and at the right and left vertical end parts, a pair of vertical drainage holes are formed by connecting left and right. A vertical drain is formed.

And by constructing a wall portion standing upright substantially vertically using such a wall body or wall unit, the end of the geotextile laid in a substantially horizontal state in the embankment behind it is the embankment of the wall portion. When a steep slope embankment having a structure fixed on the inside is constructed, a vertical gutter drainage hole having a plurality of transverse drainage holes penetrating in the transverse direction of the wall portion and connecting the upper and lower transverse drainage holes A wall portion having

In a steep sloped embankment with such a vertical gutter drainage hole, it usually flows from the inside of the embankment into each transverse drainage hole in the wall due to rain or the like, and the water flowing into each transverse drainage hole flows into the vertical gutter drainage hole. Therefore, the water will be drained from the bottom transverse drainage hole. When the amount of water flowing into each transverse drainage hole is large, the water flowing in from each transverse drainage hole is drained directly to the outer wall surface side without passing through the downflow drainage hole.

[Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

The wall surface unit 1 of this embodiment is, as shown in FIG.
It is a rectangular plate that is erected to form an outer wall surface of the embankment by connecting multiple pieces by joining at the periphery, and reinforcing materials such as reinforcing bars or fiber grids are placed inside it. It is a panel-shaped precast concrete that is reinforced and has ribs 6 formed at the peripheral portion and the central portion on the inner wall surface side that is the inside of the embankment when the wall portion of the embankment is formed. Then, on the rib 6 at the lower end of the wall unit 1, a rod-shaped fixing joint member 30 having a tip bent upward is horizontally embedded in a state where it is partially embedded inside the embankment of the wall unit 1. A plurality are provided at intervals.

A convex portion 7 is formed at a lower end of the wall unit 1 in a substantially central portion in the plate thickness direction, and a protrusion 7 is formed so as to project downward over substantially the entire length of the lower end of the wall unit 1 in the longitudinal direction. A concave portion 8 having a shape into which the convex portion 7 can be fitted is formed substantially at the center of the upper end portion in the plate thickness direction over substantially the entire length of the upper end portion of the wall surface unit 1 in the longitudinal direction.

At the four corners of each wall unit 1 (see the enlarged view of the lower left corner shown in FIG. 2) and at the central portions of the upper and lower ends, transverse drainage grooves 9 that penetrate in the thickness direction of the wall unit 1 are formed.
Is formed, and when a plurality of wall surface units 1 are joined to form a wall portion, the horizontal drainage grooves 9 at the four corners of each wall surface unit 1 are combined in pairs, and the horizontal drainage water at the upper and lower ends is formed. The grooves 9 are combined in pairs so that transverse drainage holes 10 (see FIGS. 3 and 4) for draining water through the wall portion are formed at the respective positions.

Further, vertical gutter drainage grooves 11 extending in the vertical direction are formed at the right and left vertical end portions of the wall surface units 1, and the vertical gutters of the wall surface units 1 are joined by joining the adjacent wall surface units 1. The drainage grooves 11 and 11 are combined to form a vertical gutter drainage hole 12 (see FIGS. 3 and 4) that connects the transverse drainage holes 10 formed above and below the drainage grooves 11 and 11, respectively. . Further, a sleeve 12a such as a pipe made of vinyl chloride is embedded in the rib 6 at the center of each wall unit 1, and the inside of the rib 6 is vertically penetrated by this sleeve 12a, so that the wall unit The cross drainage groove 11 at the center of the upper end and the cross drainage groove 11 at the center of the lower end of 1 communicate with each other, thereby forming a vertical gutter drain hole 12 in the sleeve 12a.

Further, in order to join the wall surface units 1 to the ribs 6 at the upper and lower horizontal end portions of the wall surface units 1, respectively,
A plurality of (four in the figure) through holes 15 for inserting bolts are formed so as to penetrate in the up-down direction, and each rib 6 at each of the left and right vertical end portions of the wall surface unit 1 is also adjacent to each wall surface unit. A through hole 15 for inserting a bolt for joining 1 and 1 is formed penetrating in the lateral direction.

As the geotextile 2, a geofabric such as a woven fabric or a non-woven fabric or a geonet may be used, but a geogrid such as a so-called polymer grid or fiber grid formed by polymerizing a polymer material in a lattice shape is preferably used. It is better to use the fiber grid among the geogrids.

Specifically, this fiber grid has a structure in which fiber bundles composed of a plurality of aligned continuous fibers intersect with each other to form a lattice, and each fiber of the fiber bundles is bound by a resin material. In addition, it is a lattice-like reinforcing material having excellent mechanical properties such as strength, tensile rigidity, shearing rigidity, and creep characteristics.

Also, as a kind of such a fiber grid, which shows a particularly excellent reinforcing effect in stabilizing the embankment when embedded in a layered manner in the embankment, was filed as Japanese Patent Application No. 1-189737. There is a grid reinforcement.

This lattice-shaped reinforcing material, one or more fiber bundles in the main axis direction composed of a plurality of aligned fibers, and two or more fiber bundles extending in the other direction cross each other to form a lattice, Those fiber bundles are bound by a resin material.

And, if such a grid-like reinforcing member is composed of, for example, a single-layer fiber bundle extending in the principal axis direction and a two-layer fiber bundle extending in the other direction orthogonal to this, the intersection portion thereof Is a cross-sectional shape of a three-layer structure in which a fiber bundle extending in the main axis direction and a fiber bundle extending in the other direction orthogonal to the main axis direction are laminated, and the outermost layer at the intersection is the other direction. Of the fiber bundle, the bulge of the intersection is crushed by press molding, the distance between the adjacent intersections in the main axis direction is more than the distance between the adjacent intersections in the other direction. Is also getting bigger.

As the fibers mainly constituting the lattice-like reinforcing material, glass fibers and carbon fibers which are lightweight and have high strength are suitable, but other fibers such as organic fibers, ceramic fibers and metal fibers are preferable if necessary. Etc. may be used. Also, these fibers may be used in an appropriate combination.

Further, as the resin material for binding the fibers of the fiber bundle, for example, vinyl ester resin or the like, which has good adhesiveness to the fibers and has sufficient strength itself, is suitable. Other resin materials may be used. Examples of other resin materials include unsaturated polyester resins, epoxy resins, and phenol resins.

The ratio of the fiber and the resin material is appropriately determined in consideration of the type and strength of the fiber, and further the usage pattern of the lattice reinforcing material, for example, the fiber is a glass fiber, the resin material is a vinyl ester resin. If the fiber is 30-70% by volume
It is desirable to consider it so that it is about 20 to 60% when the fiber is pitch-based carbon fiber, for example. When the ratio of the fibers is the above or less, the strength of the lattice-like reinforcing material is remarkably reduced, while if the proportion of the fibers is increased, a high-strength lattice-like reinforcing material can be obtained,
If the proportion is too high, molding becomes difficult, which is not preferable.

Next, a steep slope embankment formed by using the wall surface unit 1 will be described with reference to FIGS. 3 to 5.

This steep embankment, as shown in FIGS. 3 and 4,
At the end of the embankment M formed on the substantially horizontal ground L, there is a wall H that is erected in a state in which a plurality of wall surface units 1 are joined at the ends, and The end on the wall H side of the geotextile 2 embedded in the backfill filled embankment 3 in a substantially horizontal state has a self-hardening connecting material such as soil cement provided inside the embankment M of the wall H. It is embedded in the fixing portion 4 and is fixed to the wall portion H.

As the self-hardening connecting material, hard-mixed soil mortar or soil cement prepared by mixing cement-based solidifying material with earth and sand obtained near the site is used.
D Hard concrete such as concrete, lime-mixed reinforced soil, etc. may also be used, or ordinary concrete, mortar, cement paste or other cement-based solidifying material, or early-strength mortar or other early-strength cement-based solidifying material. You can use such as.

The wall 5 has a foundation 5 formed by digging down the ground L and pouring in-situ concrete.
The side frame 40 of the wall portion H is formed by pouring cast-in-place concrete on the end portions of the wall portions, and the wall portions 1 are erected on the foundation 5 in a state where the adjacent end portions are in close contact with each other. The wall surface units 1 and 1 below, and the projections 7 at the lower ends of the wall surface units 1 above the wall surface units 1 and 1, respectively.
The upper and lower wall surface units 1 are arranged in a staggered manner in a state of being fitted together, and the adjacent wall surface units 1 are bolted and nuted by utilizing the through holes 15, 15 of the left and right ribs 6, 6 of each wall surface unit 1. Adjacent wall surface units 1 are joined by being stopped, and bolts 16 are inserted into the through holes 15 of the upper and lower ribs 6 of each wall surface unit 1 to insert the bolts.
The upper and lower wall surface units 1 and 1 are joined by fastening a nut 17 to 16. And, on each wall unit 1 at the uppermost part of the wall portion H, cast-in-place concrete is cast to form a road shoulder 41 having a gentle slope corresponding to the slope of the embankment M, and the road shoulder 41 has a guardrail. G is attached.

Further, as shown in FIG. 4, a wood piece 32 is arranged at the upper edge of the rib 6 at the lower end of each wall unit 1 on the inside embankment side in contact with the upper edge of the rib 6, And the rib 6
Reinforcing bar 3 such as round steel on the fixing joint member 30 provided above
1, 31 are placed, the ends of the geotextile 2 are placed on the reinforcing bars 31, 31 and the wood piece 32, and the L-shaped material made of vinyl chloride is placed on the wood piece 32 with the geotextile 2 being sandwiched. 33 is nailed 34, and a self-hardening connecting material is placed inside the L-shaped material 33 and the wood piece 32 to form the fixing portion 4 on the rib 6, and the fixing joint member 30, Reinforcing bars 31, 31 and the end portion of the geotextile 2 are embedded and the end portion of the geotextile 2 is fixed on the rib 6 at the lower end portion of each wall surface unit 1.

Then, in this steep slope embankment, as shown in FIG. 5, four transverse drainage grooves 9 at the four corners of each wall surface unit 1 are combined in a set, and two transverse drainage grooves 9 at the center of the upper and lower ends are formed. A plurality of transverse drainage holes 10 which are combined in one set and penetrate in the transverse direction of the wall portion H are formed at equal intervals on the upper, lower, left and right sides of the wall portion H, and the rib 6 at the central portion of each wall surface unit 1 is formed. The vertical gutter drainage hole 12 that penetrates the inside in the vertical direction is provided in the wall unit 1.
Of the horizontal drainage holes 10 located at the center of the upper end of each of the vertical drainage grooves 11 at the vertical ends of the adjacent wall units 1 are connected to each other. Vertical gutter drainage holes 12 that are combined in a set and penetrate vertically in the left and right wall portions H of each wall surface unit 1 are formed, and these vertical gutter drainage holes 12 are provided in each of the wall surface units 1 located above and below the vertical gutter drainage hole 12. The transverse drainage holes 10, 10 at the four corners communicate with each other.

When constructing such a steep slope embankment, as shown in FIG. 3, the position where the wall portion H of the ground L is to be constructed is dug in advance and the cast-in-place concrete is placed in that portion. While the base 5 is provided by the above, the recess 8 is formed at the position where the wall portion of the upper surface of the base 5 is to be erected, and the lower part of the anchor bolt 14 is located inside the embankment M from the position where the recess 8 is formed. Install it in a buried state.

After the foundation 5 is provided on the ground L in this way, the foundation 5
Fit the convex portion 7 at the lower end of the wall surface unit 1 into the concave portion 8 of
And, the anchor bolt 14 on the foundation 5 is inserted into the through hole 15 formed in the rib 6 at the lower end of the wall surface unit 1,
The bottom wall unit 1 is mounted on the foundation 5 by fastening a nut 17 to the anchor bolt 14. Then, the geotextile 2 is laid on the ground L behind the wall unit 1, and the wall portion H side of the geotextile 2 on the fixing joint member 30 provided on the rib 6 at the lower end of the wall unit 1 is provided. By mounting a self-hardening connecting material on the ribs 6 to form the fixing portion 4 with the end portion placed, the fixing joint member 30 and the end portion of the geotextile 2 are embedded in the fixing portion 4. The end portion of the geotextile 2 is fixed to the wall surface unit 1.

After mounting the bottom wall unit 1 on the foundation 5 in this way, the embankment material 3 is piled up to a position slightly higher than the upper end of the bottom wall unit 1, and then the embankment material 3
After the upper part of the wall surface is compacted and compacted to the same level as the upper end of the wall surface unit 1, the geotextile 2 is laid on the upper part of the embankment material 3. After doing this, the fourth
As shown in the figure, the recess 8 at the upper end of the wall unit 1
The upper and lower ribs 6, 6 of each wall unit 1, 1 are brought into close contact with each other by fitting the convex portion 7 of the lower end portion of another wall unit 1 to the through holes 15, 15 of the respective ribs 6, 6. The upper and lower wall units 1, 1 are joined by inserting the bolt 16 and fastening the nut 17 to the bolt 16.

After mounting the second wall unit 1 from the bottom in this way, the geotextile 2 is laid on the embankment material 3 behind the wall unit 1 and the rib 6 at the lower end of each wall unit 1 is on the inner side of the embankment. A piece of wood 32 is arranged on the upper edge portion in a state of being in contact with the upper edge portion of the rib 6, and on the fixing joint member 30 provided on the rib 6, rebars 31, 31 such as round steel are provided.
Place the end of the geotextile 2 on the reinforcing bars 31, 31 and the piece of wood 32, and clamp the vinyl textile L-shaped material 33 on the piece of wood 32 with the geotextile 2 sandwiched. 34. And after doing this,
A self-hardening connecting material such as soil cement is cast on the inside of the L-shaped member 33 and the wood piece 32 to form the fixing portion 4 on the rib 6, whereby the fixing joint member 30 and the reinforcing bar are provided in the fixing portion 4. The end portions of 31, 31 and the geotextile 2 are embedded, and the end portions of the geotextile 2 are fixed on the ribs 6 at the lower ends of the wall surface units 1.

Then, the wall portion H is constructed by connecting the plurality of wall surface units 1 in the upward and lateral directions in this way, and at this time, the wall surface units 1 at the same height are connected to the wall surface units below it. Each time all the wall units 1 and the wall units 1 adjacent to each other are connected to each other, the embankment material 3 is placed behind the wall units 3 to perform rolling compaction, and by repeating these operations, the embankment M up to a predetermined height is parallel to the wall portion H. To create.

Then, at that time, a vinyl chloride pipe that is half-divided in the transverse drainage groove 9 and the vertical gutter drainage groove 11 located on the side portion of the wall portion H that is assembled by connecting the wall surface units 1 is installed. A horizontal drainage hole 10 and a vertical gutter drainage hole 12 are formed, and a formwork is vertically arranged on the outside of the end of the foundation 5 along the side part of the wall portion H on the outside thereof. The side frame 40 of the wall H is formed by pouring concrete. In addition, after assembling each wall surface unit 1 located at the uppermost part of the wall portion H, a mold is placed on the upper part of the wall unit 1 and the cast-in-place concrete is poured into the mold to form the road shoulder 41. In addition, the lower part of the guardrail G is embedded in the upper part of the cast-in-place concrete poured at that time so that the guardrail G can be extended along the road shoulder 41.

In such a steep slope embankment, as described above, the fiber grid having excellent mechanical characteristics such as strength, tensile rigidity, shear rigidity and creep characteristics is sandwiched between the wall units 1 at their connecting portions. Since the fiber grid (geotextile 2) is connected and embedded in the embankment M, the wall portion H is prevented from collapsing to the outside due to the pullout resistance of the fiber grid. Is kept upright, which ensures excellent stability over a long period regardless of the height of the embankment M.

Further, in this steep slope embankment, as shown in FIG. 5, the transverse drainage grooves 9 at the four corners of each wall surface unit 1 are combined in a set of four, and the transverse drainage grooves 9 at the central portions of the upper and lower ends are formed. A plurality of transverse drainage holes 10 which are combined in pairs and penetrate in the transverse direction of the wall portion H are formed at equal intervals on the upper, lower, left and right sides of the wall portion H, and a rib at the central portion of each wall unit 1 is formed. The vertical gutter drainage hole 12 penetrating in the vertical direction in
Of the horizontal drainage holes 10 located at the center of the upper end of each of the vertical drainage grooves 11 at the vertical ends of the adjacent wall units 1 are connected to each other. Vertical gutter drainage holes 12 that are combined in a set and penetrate vertically in the left and right wall portions H of each wall surface unit 1 are formed, and these vertical gutter drainage holes 12 are provided in each of the wall surface units 1 located above and below the vertical gutter drainage hole 12. Since the transverse drainage holes 10, 10 at the four corners are communicated with each other, the water accumulated in the embankment M due to rain or the like usually flows from the transverse drainage holes 10 into the vertical gutter drainage hole 12 communicating therewith, and the bottom traverse is conducted. The water is drained from the drain hole 10, and therefore, the wall surface of the wall portion H may be soiled with dirt or the like that flows out together with the drain water to impair the appearance, or the drain water may adversely affect facilities or passersby outside the wall portion H. Absent. Moreover, when the amount of drainage from each transverse drainage hole 10 is large and exceeds the allowable flow rate of the downflow drainage hole 12, the water is drained directly from each transverse drainage hole 10 to the outer wall surface side, regardless of the amount of drainage. Will be drained effectively,
Moreover, even if the vertical gutter drainage hole 12 is clogged with soil or the like, the water will be drained smoothly.

Further, in this steep slope embankment, as shown in FIG. 4, the wood piece 32 is attached to the upper edge of the rib 6 at the lower end of each wall unit 1 on the inner side of the embankment in contact with the upper edge of the rib 6. The end portion of the geotextile 2 is placed on the wood piece 32, and the L-shaped material 33 made of vinyl chloride is nailed to the wood piece 32 with the end portion of the geotextile 2 sandwiched.
Then, a self-hardening connecting material is placed inside the L-shaped member 33 and the wood piece 32 to form the fixing portion 4 on the rib 6, and the end portion of the geotextile 2 is embedded in the fixing portion 4. Since the embankment M is submerged in the state, the shear crack caused by the subsidence of the embankment M causes the shear crack due to the subsidence of the embankment M along the vertical surface of the L-shaped member 33 to the fixing portion on the lower side of the geotextile 2. 4 is generated on the inner side of the embankment, so that even if the geotextile 2 in the embankment M sinks, the sinking amount of the geotextile 2 is absorbed by the deformation and falling of the wood piece 32, and therefore the geotextile 2 Is not cut by shearing forces.

In this embodiment, as shown in FIG. 5, since the wall surface units 1 forming the wall portion H are arranged in a staggered manner,
At the side portion of the wall portion H, it is necessary to use every other wall unit 1 having a horizontal length of half the normal length, but as shown in FIG. The wall portions H may be arranged so as to be placed directly on top of each other without shifting to the left and right, and in that case, the wall portion H can be configured by using only the same wall surface unit 1.

Next, a second embodiment of the present invention will be described with reference to FIGS. 7 to 9.

In this embodiment, as shown in FIG. 7, in constructing the wall portion of the embankment, a wall body 50 made of precast concrete is formed in a rectangular plate shape having a height dimension corresponding to the height of the wall portion. A plurality of the wall bodies 50 are connected by joining at the left and right ends to form a wall portion.

The wall body 50 has an inverted T-shaped cross section including a flat plate portion 51 forming a wall surface and a base portion 52 formed by expanding the lower end portion thereof. A plurality of fixing joint members 30 are provided horizontally at equal intervals at a plurality of levels inside the embankment. Each fixing joint member 30 is provided in a state that its rear end is embedded inside the embankment of the wall body 50, and has a rod-like shape that horizontally protrudes into the embankment inside, and its tip is It is bent upward at a right angle.

Further, joint fittings 53 are provided at a plurality of positions on each of the left and right ends of the vertical surface on the inside of the embankment of the flat plate portion 51 and on each of the left and right ends of the upper surface of the foundation part 52 on the inside of the embankment. As shown in FIG. 8, the joint fitting 53 is composed of an L-shaped plate member 54 and an anchor portion 55 welded to the L-shaped plate member 54. A bolt is attached to the joint plate portion of the L-shaped plate member 54. The hole 56 is formed. The anchor parts 55 of the joint fitting 53 are provided in a state of being embedded in the left and right end portions of each wall body 50, and when connecting the adjacent wall bodies 50, 50, the corresponding joint fitting 53 is provided. With the joint surfaces of the L-shaped plate members 54, 54 of 53, 53 in close contact with each other, the wall bodies 50 are connected by fastening bolts and nuts using the bolt holes 56, 56 of the joint plate portions. There is.

Further, in the central portion of the flat plate portion 51, as shown in FIG. 7, a vertical gutter drainage hole 12 penetrating vertically is formed, and a plurality of vertical gutter drainage holes 12 are formed. Transverse drainage holes 10 penetrating in the transverse direction of the flat plate portion 51 at predetermined intervals are formed in the level, and these upper and lower transverse drainage holes 10 are formed.
The vertical gutter drainage hole 12 communicates with 10.

As shown in FIG. 9, a steep slope embankment formed by using such a wall body 50 has a plurality of wall bodies 50 on the left and right at the end of the embankment M formed on the substantially horizontal ground L. A wall portion H having a structure of being joined at each end portion is constructed, and the end portion on the wall portion H side of the geotextile 2 embedded in the embankment material 3 filled behind the wall portion H in a substantially horizontal state is It is embedded in the fixing portion 4 made of a self-hardening connecting material such as soil cement provided inside the embankment M of the wall portion H and fixed to the wall portion H.

The wall portion H is formed by digging the ground L in a groove shape and arranging the wall body 50 there.
By burying, the flat plate portions 51 of the plurality of wall bodies 50 are erected in an adjacent state so as to form a wall surface, and the left and right end portions of the adjacent wall bodies 50, 50 are in close contact with each other. And the bolt holes of the respective fittings 53, 53 on the left and right of each of the wall bodies 50, 50
The respective joint fittings 53, 53 are fixed by bolts and nuts using 56, 56 so that adjacent wall bodies 50 are joined together.

Next, a third embodiment of the present invention will be described with reference to FIG.

In this embodiment, as shown in FIG.
Is constructed of cast-in-place concrete.

Further, the wall portion H is formed integrally with the foundation 5 on the foundation 5 embedded in the ground L, and has a tapered cross section in which the wall thickness becomes thinner toward the top. ,
A plurality of fixing joint members 30 are provided at a plurality of levels inside the embankment at equal intervals in the horizontal direction. In FIG. 10, reference numeral D is a road provided on the embankment M, G is a guardrail provided on the shoulder of the road D, and S is a drainage gutter.

Further, the wall H has a plurality of vertical gutter drain holes 12 penetrating the inside thereof in the vertical direction at predetermined intervals in the extending direction of the wall H, and is orthogonal to the vertical gutter drain holes 12. A plurality of horizontal drainage holes 10 penetrating in the transverse direction of the wall portion H are formed at predetermined intervals, and the vertical drainage drain holes 12 communicate with the upper and lower horizontal drainage holes 10.

In addition, in the steep slope embankment of each said Example, although the geotextile 2 is laid in the embankment material 3 in a horizontal state, it is not necessarily required to lay the geotextile 2 horizontally, for example, the geotextile 2 in the embankment material 3 is It does not matter even if it is laid with a slope so that the rear part becomes lower.

"Effect of the invention" According to the steep slope embankment having the vertical gutter drainage hole of the present invention, the embankment material is embeded behind the substantially vertically standing wall portion and laid in the embankment material in a substantially horizontal state. In a steep slope embankment in which the end portion of the geotextile is fixed to the wall portion, a plurality of transverse drainage holes penetrating in the transverse direction of the wall portion are formed,
In addition, since the vertical gutter drainage hole that communicates with the upper and lower transverse drainage holes is formed so as to penetrate through the inside of the wall portion, the water accumulated in the embankment due to rain or the like usually communicates with it from the transverse drainage holes. It will flow into the vertical gutter drainage hole and be drained from the bottom transverse drainage hole. Therefore, the wall surface of the wall part will be soiled with dirt and the like and spoil the appearance, or the drainage will be outside the wall part H. It does not adversely affect people passing by. In addition, when the amount of drainage from each transverse drainage hole exceeds the allowable flow rate of the downflow drainage hole, it is drained directly to the outer wall surface from each transverse drainage hole, so it is effective regardless of the amount of drainage. It will be drained, and even if the vertical gutter drainage hole is clogged with earth and sand, it will be drained smoothly. Further, even when the outflow soil particles are clogged in the drain hole, the determination of the clogging section can be judged from the outside, so that the inside of the drain hole can be easily cleaned.

Further, according to the wall body used for the steep slope embankment of the present invention, a plurality of transverse drainage holes that constitute a substantially vertically standing wall portion and penetrate in the transverse direction are continuously provided in the vertical direction. Since a vertical gutter drainage hole that connects all of the upper and lower transverse drainage holes is formed so as to penetrate therethrough, the wall body is made of precast concrete, and by connecting it at each of the left and right ends, the embankment is formed. Cross section drainage for draining the water inside the embankment when the wall part of the embankment is constructed by constructing the wall part of the embankment or by forming the wall body with cast-in-place concrete to make it the wall part of the embankment. It is possible to form a plurality of holes in the wall portion and to form a vertical gutter drainage hole that connects the upper and lower transverse drainage holes.

Further, according to the wall unit used for the steep slope embankment of the present invention, the wall part of the embankment which is substantially plate-like and is erected by joining a plurality of ends thereof is connected to each other, and each of the upper and lower walls is formed. At the horizontal end, two pairs of vertical drainages are formed as horizontal drainage drains by connecting them vertically, and vertical drainage drains that connect the upper and lower horizontal drainage drains penetrate the inside. Since a plurality of wall units are assembled to form a wall portion of the embankment, it is possible to form a plurality of transverse drainage holes in the wall portion for draining water in the embankment. It is possible to form a vertical gutter drainage hole that communicates with each transverse drainage hole.

Further, according to another wall unit used for the steep slope embankment of the present invention, the wall portion of the embankment which is substantially plate-shaped and is erected by joining a plurality of end portions thereof is connected, and At the four corners, horizontal drainage grooves are formed as horizontal drainage holes in groups of four by connecting vertically and horizontally, and at the left and right vertical ends, by connecting left and right, two pairs each are formed vertically. Since a vertical gutter drainage groove that is a gutter drainage hole is formed, when assembling a plurality of wall surface units to form a wall portion of the embankment,
A plurality of transverse drainage holes for draining water in the embankment can be formed in the wall portion, and a vertical gutter drainage hole communicating with the upper and lower transverse drainage holes can be formed.

[Brief description of drawings]

1 to 6 are views showing a first embodiment of the present invention, wherein FIG. 1 is a perspective view of a wall unit, and FIG. 2 is an enlarged view of a lower left corner of the wall unit in FIG. , Fig. 3 is a side sectional view of a steep slope embankment using the same wall unit, Fig. 4 is a detailed sectional view of a wall portion of the steep slope embankment and a fixing portion of the geotextile, and Fig. 5 is a steep slope embankment. FIG. 6 is a front view in which a part of the wall portion is broken, and FIG. 6 is a front view of a steep slope embankment in which the arrangement of the wall unit is changed. 7 to 9 are views showing a second embodiment of the present invention, FIG. 7 is a perspective view of a wall body and its joint portion, and FIG. 8 is a perspective view showing a joint metal fitting and its joint state. Fig. 9 is a side sectional view of a steep slope embankment using a wall. FIG. 10 is a view showing a third embodiment of the present invention and is a side sectional view of a steep slope embankment in which a wall body is constructed by cast-in-place concrete. 11 and 12 are views showing a steep slope embankment using a conventional wall unit,
FIG. 11 is a front view and FIG. 12 is a side sectional view. 1 ... Wall unit, 2 ... Geotextile, 3 ... Embankment material, 4 ... Fixing part, 5 ... Foundation, 6 ... Rib, 7 ... Convex part, 8 ... Recessed part, 9 ... Transverse drainage groove , 10 …… transverse drainage hole, 11 …… vertical gutter drainage groove, 12 …… vertical gutter drainage hole, 12a …… sleeve, 14 …… anchor bolt, 15 …… through hole, 16 …… bolt, 17 …… nut , 30 …… Anchoring joint member, 31 …… Reinforcing bar, 32 …… Wood piece, 33 …… L-shaped material, 34 …… Nail, 40 …… Side frame, 41 …… Road shoulder, 50 …… Wall body, 51 …… Flat plate part, 52 ... Foundation part, 53 ... Joint fitting, 54 ... L type plate material, 55 ... Anchor part, 56 ... Bolt hole, L ... Ground, M ... Embankment, H ... Wall part, G ... Guardrail, D ... Road, S ... Gutter.

Claims (4)

[Claims] 1. A steep embankment obtained by embedding an embankment material behind a wall portion which is erected substantially vertically and fixing the end of the geotextile laid in the embankment material in a substantially horizontal state on the wall portion. And a plurality of transverse drainage holes penetrating in the transverse direction of the wall portion are formed, and a vertical gutter drainage hole communicating the upper and lower transverse drainage holes is formed penetrating the inside of the wall portion. A steep slope embankment with a vertical gutter drainage hole. 2. A wall body used for a steep slope embankment as set forth in claim 1, comprising a wall portion standing substantially vertically and having a plurality of transverse drainage holes penetrating in the transverse direction in the vertical direction. A wall body having a vertical gutter drainage hole which is continuously provided and communicates with all of the upper and lower transverse drainage holes and which penetrates the inside thereof. 3. A substantially plate-shaped wall unit used for a steep slope embankment as set forth in claim 1, wherein a plurality of wall units of the embankment are erected by joining at the ends thereof, and At the upper and lower horizontal end portions, horizontal drainage grooves are formed by connecting them vertically to form horizontal drainage holes, and vertical drainage holes that connect the upper and lower horizontal drainage channels are formed. A wall unit formed by penetrating the inside. 4. A substantially plate-shaped wall unit used for the steep slope embankment according to claim 1, wherein a plurality of wall units of the embankment are erected by joining at the ends thereof, and , Four horizontal drainage grooves are formed at the four corners by connecting them vertically and horizontally to form horizontal drainage holes, and at the left and right vertical end portions, two horizontal drainage pairs are formed. The wall unit is characterized in that a vertical drain is formed as a vertical gutter drainage hole.