JPH03156026A - Steep-sloped banking equipped with downspout drain outlet, and wall body and wall surface unit therefor - Google Patents

Abstract

PURPOSE:To prevent the surface of a wall body from being stained by drainage by a method wherein traversal drain outlets and downspout drain outlets are provided in a wall body that is made up by connecting one after another a plurality of wall surface units vertically and horizontally, and the traversal drain outlets are connected one another with each one of the downspout drain outlets positioned above and below. CONSTITUTION:A lowermost wall surface unit 1 is placed over a foundation 5. Then a geotextile 2 is laid on the ground L in the rear of the wall surface unit, and banking materials 3 are piled up over the geotextile and the geotextile 2 is further laid thereon. A wall body H is then built with a plurality of wall surface units 1 joined one after another in both the vertical and the horizontal directions, and the banking M in a specified height is made is parallel with the building of the wall. In the traversal drain trenches 9 and downspout drain trenches 11 provided to the side of the wall body H, traversal drain outlets 10 and downspout drain outlets 12 are formed with halved pipes fitted thereto from the outside. The traversal drain outlets 10 are connected one another with each one of the downspout drain outlets 12 positioned above and below, and drainage is made through the traversal drain outlet 10 positioned in the bottom. Thereby the surface of the wall body can be prevented from being stained by the drainage.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a steep slope embankment having a substantially vertically erected wall and having a downpipe drainage hole in the wall, and a wall used therefor. This relates to a wall unit.

``Conventional technology'' In recent years, especially in high embankments, there has been a tendency to make the walls of the embankments steeper in order to make effective use of limited land.
As a steep embankment with such a steep wall,
For example, those shown in FIGS. 11 and 12 are known.

This steep-slope embankment has a wall H that is erected at the end of an embankment M built on substantially horizontal ground, with a plurality of wall units 1 joined at their ends, and , the end of the wall part H side of the noo textile 2 buried in the embankment material 3 filled in the back of the wall part H in a substantially horizontal state is provided on the inside side of the embankment M of the wall part H. It is embedded in a fixing section 4 made of a self-hardening connecting material such as soil cement and fixed to the wall section H.

For the wall H, a foundation 5 is formed by digging into the ground and pouring cast-in-place concrete, and the cast-in-place concrete is placed on the end of the foundation 5 to form the side framework 40 of the wall H. At the same time, a plurality of wall units 1 are erected on the foundation 5 with their adjacent ends in close contact with each other, and each of the upper, lower, left and right wall units 1 is arranged in a staggered manner. It has a structure in which wall units 1 are joined together. Then, on each wall unit L at the top of this wall H, cast-in-place concrete is placed to form a road shoulder 41 with a gentle slope corresponding to the slope of the embankment M, and this shoulder 41 has a guard rail. G is attached.

In addition, each wall unit 1 is formed with a cross drainage hole IO for draining water that penetrates in the thickness direction of the wall unit 1, and rainwater accumulated in the embankment M is drained from the cross drainage hole IO. The water is drained towards the outside wall.

``Problem to be solved by the invention'' However, as mentioned above, the wall section H provided with the cross drainage hole IO
In the embankment with 100 mA, the water accumulated in the embankment M is drained directly from the cross drainage holes IO to the outer surface of the wall. Since the external wall surface becomes dirty with the earth and sand contained in the drainage, there is a problem that the aesthetic appearance of the external wall surface is impaired, especially when such dirty water is drained from the upper cross drainage hole IO. Amount of water discharged from drainage hole l/0 (drainage 1i
), there is a risk of adverse effects or damage to facilities below, passersby, etc.

This invention was made in view of the above circumstances, and it not only ensures that the water in the embankment is drained, but also suppresses as much as possible the water that is discharged directly from the upper cross drainage hole to the outer wall side. The object of the present invention is to provide a steeply sloped embankment having downspout drainage holes, and a wall body and wall unit used therefor.

[Means for Solving the Problems j The steep slope embankment of the present invention includes embankment materials piled up behind a wall section erected approximately vertically, and the ends of geotextiles laid approximately horizontally within the embankment materials. is a steeply sloped embankment in which a wall is fixed to the wall, a plurality of transverse drainage holes are formed passing through the wall in the transverse direction, and a downpipe drainage hole is provided that communicates each of the upper and lower transverse drainage holes. It is formed by penetrating the inside of the wall.

Further, the wall body used for the steep slope embankment of the present invention constitutes a wall section that is erected substantially vertically, and has a plurality of cross drainage holes that penetrate in the transverse direction and are arranged in a row in the vertical direction. A vertical gutter drain hole is formed through the interior of the drain hole, which communicates all the cross drain holes.

In addition, the wall unit used for the steep slope embankment of this invention is
A substantially plate-shaped wall unit with 1. Multiple pieces are connected by joining at their ends to form an erected embankment wall,
In addition, at each of the upper and lower horizontal ends, a pair of transverse drainage grooves are formed by connecting the upper and lower parts to form a transverse drainage hole, and a downpipe drainage hole is provided to communicate the upper and lower transverse drainage grooves. It is formed by penetrating the inside thereof.

Further, the wall unit used for the steep slope embankment of the pond of the present invention is a substantially plate-shaped wall unit, and a plurality of wall units are connected by joining at the ends to constitute the wall of the embankment, In addition, at the four corners, a set of four horizontal drainage holes are formed by connecting the upper, lower, left, and right sides, and two horizontal drainage holes are formed at each vertical end of the left and right ends by connecting the left and right sides. A vertical drain groove is formed in pairs to serve as a downspout drainage hole.

"Function" In this invention, an embankment material is piled up behind a wall section that is erected substantially vertically, and the end portion of the nootextile laid in a substantially horizontal state within the embankment material is fixed to the wall section. When constructing a steep slope embankment, by configuring the wall using the following wall bodies or wall units, a plurality of cross drainage holes penetrating the wall in the transverse direction are formed, and each of the upper and lower A downspout drain hole communicating with the cross drain hole is formed through the interior of the wall.

The above-mentioned wall constitutes a wall section that stands approximately vertically, and has a plurality of horizontal drainage holes that penetrate in the horizontal direction and are vertically arranged in series, and all of the upper and lower horizontal drainage holes are connected vertically. A gutter drainage hole is formed through the inside of the gutter.

Further, the above-mentioned wall unit is a substantially plate-shaped wall unit, and a plurality of units are connected by joining at the ends to constitute an erected embankment wall, and each of the upper and lower horizontal ends ,
By connecting the upper and lower parts, a set of two transverse drainage grooves are formed as a transverse drainage hole, and a downspout drainage hole that communicates each of the upper and lower transverse drainage grooves is formed by penetrating the inside of the vertical gutter drainage hole. It is something.

In addition, the other wall units are approximately plate-shaped wall units, in which a plurality of wall units are connected by joining at the ends to form an erected embankment wall, and the four corners are provided with By connecting each side, a set of four cross drain holes are formed to form a cross drainage hole, and by connecting the right and left sides, a set of two each forms a downspout drainage hole at each vertical end. A vertical drainage ditch is formed.

By constructing a substantially vertically erected wall using such a wall or wall unit, the end of the geotextile laid in a substantially horizontal state in the embankment behind it can be placed in the embankment of the wall. If a steeply sloped embankment with a structure fixed on the inside is created, a downpipe drainage hole having a plurality of cross drainage holes penetrating the wall in the transverse direction and communicating the upper and lower cross drainage holes. The wall section will be constructed with a

In steep-slope embankments with such downspout drainage holes, water normally flows from the inside of the embankment into each of the cross-drainage holes in the wall due to rain, etc., and water that flows into these cross-drainage holes flows into the downspout drainage holes. The water will be drained from the lowest horizontal drainage hole. Moreover, when the amount of water flowing into each cross drainage hole is large, the water flowing from each cross drainage hole is directly drained to the outer wall surface side without passing through the downspout drainage hole.

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

The wall unit I of this embodiment, as shown in FIG.
It has a rectangular plate shape, and is erected in a state in which multiple pieces are connected by joining at the peripheral part to form the outer wall surface of the embankment, and reinforcing materials such as reinforcing bars or fiber grids are arranged inside. It is a panel-shaped precast concrete that is striated and has ribs 6 formed at the peripheral edge and center of the inner wall surface that becomes the inside of the embankment when the wall of the embankment is constructed. Then, on the rib 6 at the lower end of the wall unit l, a rod-shaped fixing joint member 30 whose tip is bent upward is horizontally aligned with a part embedded inside the embankment of the wall unit l. Multiple locations are provided at intervals.

A convex portion 7 that protrudes downward over approximately the entire length of the lower end of the wall unit 1 in the longitudinal direction is formed at approximately the center in the thickness direction of the lower end of the wall unit 1.
A recess 8 having a shape into which the protrusion 7 can be fitted is formed approximately at the center of the upper end in the thickness direction, extending over approximately the entire length of the upper end of the wall unit l in the longitudinal direction.

At the four corners of each wall unit l (see the enlarged view of the lower left corner shown in FIG. 2) and at the center of each upper and lower end, there are transverse drainage grooves 9 that penetrate through the wall unit l in the thickness direction. is formed, and when a plurality of wall units l are joined to form a wall, the cross drainage grooves 9 at the four corners of each wall unit l are combined in sets of four, and the cross drainage grooves at the upper and lower ends are The grooves 9 are combined in pairs, and a transverse drainage hole 10 (third
(see Fig. 4 and Fig. 4).

In addition, downpipe drainage grooves 11 extending in the vertical direction are formed at the left and right vertical ends of each of the wall units I, and each of the adjacent wall units I! By joining each wall unit I
The vertical gutter drainage grooves 11 and 11 are combined to form a vertical gutter drainage hole 12 (see Figures 3 and 4) that communicates with each of the horizontal drainage holes IO and 10 formed above and below it. It looks like it is. 'Furthermore, each of the above wall units l
A sleeve 12a such as a vinyl chloride pipe is embedded in the rib 6 at the center of the sleeve 12. The inside of the rib 6 is vertically penetrated by the rib 6, and the transverse drainage groove 11 at the center of the upper end of the wall unit l communicates with the transverse drainage groove ll at the center of the lower end. A gutter drainage hole 12 is formed.

Further, each rib 6 at the upper and lower horizontal ends of each wall unit l is provided with a
A plurality of (four in the figure) through-holes 15 for inserting bolts are formed vertically penetrating each other, and each rib 6 at each of the left and right vertical ends of the wall unit 1 is also formed in each adjacent wall unit. A through hole 15 for inserting a bolt for joining the parts 1 and 1 is formed to pass through in the lateral direction.

As the geotextile 2, it is possible to use geofabricates or geonets made of woven or nonwoven fabrics, but it is preferable to use geogrids such as so-called polymer grids or fiber grids formed from polymeric materials in a lattice shape. Among these geogrids, it is especially desirable to use fiber grids.

Specifically, this fiber grid has a structure in which fiber bundles made of a plurality of aligned continuous fibers cross each other to form a lattice shape, and each fiber of the fiber bundles is bound by a resin material. It is a lattice-like reinforcing material with excellent mechanical properties such as strength, tensile rigidity, shear rigidity, and creep properties.

In addition, it is a kind of fiber grid that has a particularly excellent reinforcing effect in stabilizing the embankment when buried in layers in the embankment.
There is a lattice reinforcement material filed as No. 189737.

This lattice-shaped reinforcing material has a lattice-like shape in which one or more layers of fiber bundles in the main axis direction and two or more layers of fiber bundles extending in the other direction cross each other, and are made of a plurality of aligned fibers. These fiber bundles are bound together with a resin material.

Then, if such a lattice-like reinforcing material is composed of, for example, one layer of fiber bundles extending in the main axis direction and two layers of fiber bundles extending in the other direction perpendicular to this, The intersection □ has 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 perpendicular to the main axis direction are laminated. The outermost layer is made of fibers/fiber bundles in the other direction, and the bulges at the intersections are crushed by press molding, and the distance between adjacent intersections in the main axis direction is equal to that of the adjacent fibers in the other direction. greater than the spacing between each matching intersection.

The fibers that form the main body of this lattice-like reinforcing material are preferably lightweight and high-strength glass fibers, carbon fibers, fibers, etc., but if necessary, other fibers such as organic fibers, ceramic fibers, metal fibers, etc. Fibers or the like may also be used. Further, these fibers may be used in appropriate combination.

Further, as the resin material for binding each fiber of the fiber bundle, for example, vinyl ester resin, which has good adhesiveness to the fibers and has sufficient strength itself, is suitable.
Pond resin materials may be used depending on the type of fiber used. Examples of other resin materials include unsaturated polyester resins, epoxy resins, and phenolic resins.

The ratio of the fibers to the resin material is appropriately determined taking into consideration the type and strength of the fibers, as well as the form of use of the lattice-like reinforcing material. For example, if the fibers are glass fibers and the resin material is vinyl ester resin, If the fiber volume ratio is 30 to 7
If the fiber is pitch-based carbon fiber, for example, it is desirable to consider it to be about 20 to 60%. If the proportion of fibers is less than the above, the strength of this lattice-like reinforcement material will be significantly reduced.On the other hand, if the proportion of fibers is increased, a lattice-like reinforcement material with higher strength can be obtained, but if the proportion is too high, It becomes difficult to mold,
Undesirable.

Next, a steeply sloped embankment constructed using such a wall unit 1 will be explained with reference to FIGS. 3 to 5.

This steep slope embankment, as shown in Figures 3 and 4,
At the end of the embankment M built on a substantially horizontal ground, there is a wall H that is erected with a plurality of wall units l joined at their ends, and The end of the geotextile 2 on the wall H side, which is buried in the embankment material 3 filled in the back in a substantially horizontal state, is connected to a self-hardening connecting material such as soil cement provided on the inside of the embankment M of the wall H. It is embedded in a fixing section 4 consisting of a wall section H and fixed to the wall section H.

As the above-mentioned self-hardening connecting material, hard-mixed fill mortar or soil cement, which is made by mixing earth and sand obtained near the site with a cement-based hardening agent, etc., is used.
Hard-mixed concrete such as RCD concrete, lime-mixed reinforced concrete, etc. may be used, as well as ordinary concrete, cement-based hardening agents such as mortar, cement paste, or early-strengthening cement-based assimilated materials such as early-strengthening mortar. It is okay to use something like.

The wall portion H has a foundation 5 formed by digging the ground and placing cast-in-place concrete.
Cast-in-place concrete is placed on the end of the wall H to form the side framework 40 of the wall H, and a plurality of wall units 1 are erected on the foundation 5 with their adjacent ends in close contact with each other. installed, and each wall unit below! , l, the upper and lower wall units I are arranged in a staggered manner with the convex part 7 at the lower end of each wall unit 1 above fitted into the recess 8 at the upper end of each wall unit l, and rib 6.6
The adjacent wall units 1 are joined by bolting and nutting the adjacent wall units 1 using the through holes 15.15 of the through holes 15 of the upper and lower ribs 6.6 of each wall unit l. The upper and lower wall units 1, 1 are connected by inserting a bolt 16 into the bolt 15 and tightening a nut 17 to the bolt 16. Then, on each wall unit L at the top of this wall H, cast-in-place concrete is placed to form a road shoulder 41 with a gentle slope corresponding to the slope of the embankment M, and this road shoulder 41 has a guard rail. G is attached.

Further, as shown in FIG. 4, a piece of wood 32 is placed on the upper edge of the rib 6 at the lower end of each wall unit l on the inside of the embankment so as to be in contact with the upper edge of the rib 6. Further, reinforcing bars 31, 31 such as round steel are placed on the fixing joint member 30 provided on the rib 6, and the end of the geotextile 2 is placed on the reinforcing bars 31, 31 and the wood piece 32, and A vinyl chloride cross section 33 is nailed 34 onto the wooden piece 32 with the geotextile 2 sandwiched therein, and a self-hardening connecting material is cast inside the L-shaped section 33 and the wooden piece 32 to form the rib. An anchoring part 4 is formed on the anchoring part 6, and the anchoring joint member 30, reinforcing bars 31, 31, and the end of the geotextile 2 are embedded in the anchoring part 4, so that the end of the geotextile 2 is connected to the lower end of each wall unit 1. rib 6
fixed on top.

In this steeply sloped embankment, as shown in Fig. 5, the cross drainage grooves 9 at the four corners of each wall unit 1 are combined in sets of four, and the cross drainage grooves 9 at the center of the upper and lower ends are combined into two pairs. A plurality of transverse drainage holes IO are formed at equal intervals on the upper, lower, left and right sides of the wall H, and the ribs 6 at the center of each wall unit L are combined in sets and pass through the wall H in the transverse direction.
A vertical gutter drainage hole 12 that vertically penetrates the inside of the wall unit 1 connects the cross drainage hole IO located at the center of the upper end of the wall unit 1 with the cross drainage hole IO located at the center of the lower end, and connects each adjacent wall surface. Downspout drainage W#ll at each vertical end of unit l are combined in pairs to form downspout drainage holes 12 that penetrate vertically through the left and right walls H of each wall unit l. Each vertical gutter drain hole 12 communicates with each horizontal drain hole 1O11O at the four corners of each wall unit I located above and below.

When constructing such a steeply sloped embankment, as shown in Figure 3, the location where the wall section H of the ground is to be constructed should be dug in advance, and cast-in-place concrete should be placed in that location. At the same time, a recess 8 is formed at the position where the wall on the upper surface of the foundation 5 should be erected, and the lower part of the anchor bolt 14 is placed inside the embankment M from the position where the recess 8 is formed. Install it in a buried state.

After setting the foundation 5 on the ground in this way, the foundation 5
Fit the convex part 7 at the lower end of the wall unit l into the concave part 8,
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 unit 1, and the nut 17 is fastened to the anchor bolt 14. Install wall unit l. Then, the geotextile 2 is laid on the ground behind this wall unit l, and the wall unit l
With the end of the geotextile 2 on the wall H side placed on the fixing joint member 30 provided on the rib 6 at the lower end of the anchoring part 4, a self-hardening connecting material is cast onto the rib 6. By forming the fixing joint member 30 in the fixing section 4,
Then, the end of the geotextile 2 is buried and fixed to the wall unit 1.

In this way, the lowest wall unit is placed on foundation 5! After installing the embankment material 3, fill it up to a position slightly higher than the upper end of the lowest wall unit 1, and then
After compacting the upper part of the wall unit 1 by compacting it to the same level as the upper end of the wall unit 1, the geotextile 2 is laid on top of the embankment material 3. After doing this, the fourth
As shown in the figure, the four parts 8 of the upper end of the wall unit I
By fitting the protrusion 7 at the lower end of another wall unit l into each wall unit 11! The upper and lower ribs 6.6 are brought into close contact with each other, and then the through holes 15, I
5, insert the bolt 16 into the bolt 16, and then tighten the nut 17
By fastening the upper and lower wall units! , 1 are joined.

After installing the second wall unit l from the bottom in this way, the geotextile 2 is laid on the embankment material 3 before and after the wall unit l mentioned above, and each wall unit! A piece of wood 32 is placed on the upper line of the lower end of the rib 6 on the inside of the embankment, in contact with the upper edge of the rib 6, and a round steel piece is placed on the fixing joint member 30 provided on the rib 6. Reinforcing bars such as 3
1.31, and these reinforcing bars 31, 31 and the above wooden piece 3
The end portion of the geotextile 2 is placed on top of the geotextile 2, and a vinyl chloride shape material 33 is nailed 34 onto the wood piece 32 with the geotextile 2 sandwiched therebetween. After doing this, this L-shaped member 33 and the wood piece 3
2, a self-hardening connecting material such as soil cement is placed inside the rib 6 to form an anchoring part 4, and the anchoring joint member 30, reinforcing bars 31, 31, and geotextile 2 are thereby formed in the anchoring part 4. Embed the ends of the geotextile 2
An end portion of the wall unit 1 is fixed on the rib 6 at the lower end of each wall unit l.

In this way, the wall H is constructed by connecting the plurality of wall units l upwardly and laterally, and at that time, each wall unit l of the same height is connected to each wall unit below it. 1 and adjacent wall units 1, pile up the embankment material 3 behind it and perform compaction, and by repeating these operations, the embankment M up to a predetermined height can be made parallel to the wall H. We will continue to create it.

At that time, on the side of the wall H that is assembled by connecting each wall unit L, half-split vinyl chloride pipes are covered in the cross drainage groove 9 and downspout drainage groove 11 located on the side. At the same time, formwork is placed vertically from above the end of the foundation 5 to the side of the wall H on the outside of the cross drainage hole lO and the downspout drainage hole 12, The side framework 40 of the wall portion H is formed by pouring concrete. Moreover, after each wall unit 1 located at the top of the wall H is assembled, a road shoulder 41 is formed by placing a formwork on the top and pouring cast-in-place concrete into the formwork. , and a guardrail G is placed on top of the cast-in-place concrete placed at that time.
By embedding the lower part of the guardrail G
is extended along the road shoulder 41.

In such steep slope embankments, fiber grids having excellent mechanical properties such as strength, tensile rigidity, shear rigidity, and creep properties as described above are sandwiched between the wall units 1 at their joints. Since the structure is such that this fiber grid (Noo Textile 2) is buried in the embankment M, the wall part is prevented from collapsing to the outside of the embankment M due to the pull-out resistance of the fiber grid. H is maintained in an upright state, thereby ensuring excellent stability over a long period of time regardless of the height of the embankment M.

In addition, in this steeply sloped embankment, as shown in Fig. 5, the transverse drainage grooves 9 at the four corners of each wall unit l are combined in sets of four, and the transverse drainage grooves 9 at the center of the upper and lower ends are doubled. A plurality of transverse drainage holes 1O are formed in pairs and pass through the wall I4 in the transverse direction, and are formed at equal intervals on the top, bottom, left and right sides of the wall H, and a rib 6 at the center of each wall unit 1.
A vertical gutter drainage hole 12 that vertically penetrates the inside of the wall unit 1 communicates with the cross drainage hole IO located at the center of the upper end of the wall unit 1 and the cross drainage hole IO located at the center of the lower end, and each adjacent wall surface The downspout drainage holes 12 at the vertical ends of each unit L are combined in pairs to form downspout drainage holes 12 that penetrate in the vertical direction of the left and right walls H of each wall unit 1. Since the downspout drainage hole 12 communicates with each of the horizontal drainage holes 1011O at the four corners of each wall unit l located above and below it, water that accumulates in the embankment M due to rain or the like is normally drained from each horizontal drainage hole 10. Communicating downspout drainage hole 12
As a result, the wall surface of the wall H may be soiled with earth and sand flowing out with the drainage water, spoiling its aesthetic appearance, or the drainage water may flow into the wall H.
There will be no negative impact on outside facilities or passersby. Furthermore, if the amount of water discharged from each cross drainage hole ■0 is large and exceeds the allowable flow rate of the downspout drainage hole 12, the water will be drained directly from each cross drainage hole IO to the outside wall side, so regardless of the amount of water discharged, The water will be drained effectively, and the downspout drainage hole 1
2 is clogged with earth and sand, the water can be drained without any problem.

Furthermore, in this steeply sloped embankment, as shown in FIG. 4, a piece of wood 32 is placed at the upper edge of the rib 6 at the lower end of each wall unit l on the inside of the embankment, in contact with the upper lined part of the rib 6. Then, the end of the geotextile 2 is placed on one of the pieces of wood 32, and an L-shaped member 33 made of hinyl chloride is nailed to the top of the piece of wood 32 with the end of the geotextile 2 sandwiched between them. A self-hardening connecting material is cast inside this L-shaped member 33 and the wood piece 32, and the fixing portion 4 is placed on the rib 6.
is formed, and the above-mentioned nootextile 2 is formed in the fixing part 4.
Since the ends of the molded material 33 are fixed in a buried state, even if the embankment M sinks with respect to the wall H, shear cracks due to the settling of the embankment M will occur along the vertical plane of the shaped material 33. This will occur on the inside of the embankment rather than the anchoring part 4 on the lower side of the geotextile 2, so that even if the geotextile 2 in the embankment M sinks, the amount of sinking of the geotextile 2 will be absorbed by the deformation and falling off of the wood piece 32. The geotextile 2 is therefore not cut by shearing forces.

In addition, in this embodiment, as shown in FIG.
On the sides of the wall H, it is necessary to use wall units 1 whose horizontal length is half the normal length, but every other wall unit 1 on the upper and lower sides is used, as shown in FIG. They may be arranged so as to be placed directly above each other without shifting to the left or right, and in that case, the wall portion H can be constructed using only the same wall unit l.

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 embankment wall, a precast concrete wall 50 formed into a rectangular plate shape with a height corresponding to the height of the wall is used. A plurality of the wall bodies 50 are connected at the left and right ends to form a wall part.

The wall body 50 has an inverted T-shaped cross section, which is composed of a flat plate part 51 forming a wall surface and a base part 52 formed by widening the lower end of the flat plate part 51. A plurality of fixing joint members 30 are provided at equal intervals in the horizontal direction at a plurality of levels inside the embankment. Each anchoring joint member 30 is provided with its rear end embedded inside the embankment of the wall body 50, and is a bar-shaped member that projects horizontally into the embankment. is bent upward at a right angle.

Furthermore, joint fittings 53 are provided at a plurality of locations on each left and right end of the vertical surface of the flat plate portion 51 on the inside of the embankment, and at each left and right end of the upper surface of the foundation portion 52 on the inside of the embankment. As shown in FIG.
A bolt hole 56 is formed in the joint plate portion of the mold plate material 54 described above. and,
The anchor portions 55 of the joint fittings 53 are embedded in the left and right ends of each wall body 50, and when connecting the adjacent wall bodies 50.50, the corresponding joint fittings 55
With the joint surfaces of the L-shaped plates 54 and 54 of 3.53 in close contact, each wall body 50 is connected by tightening bolts and nuts using the bolt holes 56 and 56 of each joint plate part. There is.

Further, as shown in FIG. 7, in the central part of the flat plate part 51, a downpipe drainage hole 12 is formed that penetrates therein in the vertical direction, and a plurality of downpipe drainage holes 12 are formed orthogonally to the downpipe drainage hole 12. Cross drainage holes 10 passing through the flat plate portion 51 in the transverse direction are formed at predetermined intervals on the level, and the vertical gutter drainage hole 12 communicates with each of the upper and lower cross drainage holes 10.

As shown in FIG. 9, a steeply sloped embankment constructed using such wall bodies 50 is constructed by placing a plurality of walls 50 on the left and right sides at the end of an embankment M constructed on substantially horizontal ground. The end of the geotextile 2 on the side of the wall H side is constructed such that the wall H is connected at each end, and the geotextile 2 is buried in an approximately horizontal state in the embankment material 3 filled behind the wall H. The section is embedded in a fixing section 4 made of a self-hardening connecting material such as soil cement, which is provided inside the embankment M of the wall section H, and is fixed to the wall section H.

The wall H is constructed by digging the ground into a trench and embedding the wall 50 there, so that the flat plate parts 51 of the plurality of walls 50 are placed next to each other to form a wall surface. death,
With the left and right ends of the adjacent wall bodies 50.50 in close contact, connect each joint using the bolt holes 56.56 of the left and right joint fittings 53.53 of each of the wall bodies 50.50. Adjacent wall bodies 50 are connected by fittings 53, 53 with bolts and nuts.

Next, a third embodiment of the present invention will be described with reference to FIG. 1θ.

In this embodiment, as shown in Fig. 1θ, the wall H of the embankment M is constructed of cast-in-place concrete.

The wall portion H is formed integrally with the foundation 5 at the upper part of the foundation 5 embedded in the ground, and has a tapered cross section in which the wall thickness becomes thinner at the top. hand,
A plurality of fixing joint members 30 are provided at equal intervals in the horizontal direction at a plurality of levels inside the embankment. In addition, the code in Figure 1O is the road installed on the embankment M, G is the guardrail installed on the shoulder of the road, and S is the road installed on the shoulder of the road.
is a drainage ditch.

Further, in the wall H, a plurality of downpipe drainage holes 12 are formed at predetermined intervals in the extending direction of the wall H, penetrating the inside thereof in the vertical direction, and each of these downpipe drainage holes 12 is orthogonal to the wall H. Cross drainage holes 10 passing through the wall H in the transverse direction are formed at predetermined intervals on a plurality of levels, and each downspout drainage hole 12 communicates with each of the upper and lower cross drainage holes 10.

In addition, in the steep slope embankment of each of the above embodiments, the geotextile 2 is laid horizontally in the embankment material 3, but it is not necessarily necessary to lay the geotextile 2 horizontally, for example, the geotextile 2 in the embankment material 3 is , it is also possible to lay it on a slope so that the rear side is lower.

"Effects of the Invention" According to the steep slope embankment having downspout drainage holes of the present invention, the embankment material is piled up behind the wall section erected approximately vertically, and the embankment material is laid in an approximately horizontal state within the embankment material. In a steep slope embankment in which the end of the geotextile is fixed to the wall, a plurality of transverse drainage holes are formed that penetrate in the transverse direction of the wall,
In addition, downspout drainage holes that communicate with each of the upper and lower cross drainage holes are formed through the interior of the wall, so water that accumulates in the embankment due to rain or the like normally flows through each of the cross drainage holes and communicates with it. Drainage flows into the downspout drainage hole and is discharged from the lowest cross-drainage hole, and as a result, the wall surface becomes dirty with soil and sand that flows out with the drainage water, spoiling its appearance, and the drainage water may damage the facilities outside the wall H. There will be no negative impact on pedestrians or passersby. Furthermore, if the amount of water discharged from each cross-drainage hole is large and exceeds the allowable flow rate of the downspout drainage hole, the water will be drained directly from each cross-drainage hole to the outside wall, so it will be effective regardless of the amount of water discharged. The water will be drained, and even if the downspout drainage hole is clogged with earth and sand, the water will be drained without any problem. Furthermore, even if the drain hole is clogged with drained soil particles, the clogged area can be determined from the outside, so 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 cross drainage holes are arranged in a vertical direction and constitute a wall section that stands approximately vertically, and penetrate in the cross direction thereof. A downpipe drainage hole that communicates all the upper and lower cross drainage holes is formed through the inside of the wall, so the wall is made of precast concrete and connected at the left and right ends to create an embankment. Cross-drainage that drains water in the embankment when the wall of the embankment is constructed by constructing a wall or by forming the wall with cast-in-place concrete and using it as the wall of the embankment. A plurality of holes can be formed in the wall, and a downspout drainage hole can be formed that communicates 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 unit is approximately plate-shaped, and a plurality of units are connected by joining at the ends to constitute the wall of the embankment, and each of the upper and lower At the horizontal end, cross drainage grooves are formed in sets of two cross drainage holes by connecting the upper and lower sides, and downspout drainage holes that communicate with each of the upper and lower cross drainage grooves pass through the inside. Therefore, when a wall of an embankment is constructed by assembling a plurality of wall units, it is possible to form a plurality of cross drainage holes in the wall for draining water in the embankment, and A downspout drainage hole may be formed communicating each cross drainage hole.

Further, according to another wall unit used for the steep slope embankment of the present invention, a plurality of units are connected at the ends of the substantially plate-shaped wall unit to form an upright embankment wall, and At the four corners, a set of four cross drain holes are formed by connecting the top, bottom, left and right, and at each vertical end on the left and right, a set of two vertical holes are formed by connecting the left and right sides. Vertical drainage channels are formed to serve as gutter drainage holes, so when multiple wall units are assembled to form an embankment wall, multiple cross drainage holes are formed in the wall to drain water within the embankment. In addition, it is possible to form a downspout drainage hole that communicates the upper and lower transverse drainage holes.

[Brief explanation of the drawing]

1 to 6 are views showing a first embodiment of the present invention, in which FIG. 1 is a perspective view of a wall unit, and FIG. 2 is an enlarged view of the lower left corner of the wall unit in FIG. 1. , 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 the anchorage between the wall part of the steep slope embankment and the nootextile, and Fig. 5 is a side sectional view of the same steep slope embankment. FIG. 6 is a front view of a steeply sloped embankment with a different arrangement of wall units. 7 to 9 are diagrams showing a second embodiment of the present invention, in which FIG. 7 is a perspective view of a wall and a joint thereof, and FIG. 8 is a perspective view showing a joint fitting and its joint state. Figure 95J is a side sectional view of a steep slope embankment using walls. FIG. 1O is a diagram showing a third embodiment of the present invention, and is a side sectional view of a steeply sloped embankment whose walls are constructed with cast-in-place concrete. 11 and 12 are diagrams showing a steep slope embankment using a conventional wall unit, with FIG. 11 being a front view and FIG. 12 being a side sectional view. 1... Wall unit, 2... Geotextile, 3... Embankment material, 4... Anchoring section, 5... Foundation, 6... ...Rip, 7...Protrusion, 8...Concave part, 9...Cross drainage groove, 0...Cross drainage hole, 1... ... Downpipe drainage groove, 2 ... Downpipe drainage hole, 2a ... Sleeve, 4 ... Anchor bolt, 5 ... Through hole, 6... Bolt, 7... Nut, 0... Fixing joint member, l... Reinforcement bar, 2... Wood piece, 3... ... L-shaped member, 4 ... Nail, O ... Side framework, l ... Road shoulder, 0 ... Wall, l ... ... Flat plate part, 2 ... Foundation part, 3 ... Joint fittings, 4 ... L-shaped plate material, 55 ... Part of anchor, 56. ... Bolt hole, L ... Ground, M ... Embankment, H ... Wall, G ... Guardrail, D ... ...Road, S...Gutter.

Claims (4)

[Claims] (1) Embankment materials are piled up behind a wall that stands approximately vertically,
A steeply sloped embankment in which the ends of geotextiles laid in a substantially horizontal state in the embankment material are fixed to the wall part, and a plurality of transverse drainage holes are formed that penetrate in the transverse direction of the wall part, A steep slope embankment having a downspout drainage hole, characterized in that a downspout drainage hole that communicates the upper and lower transverse drainage holes is formed penetrating the inside of the wall. (2) A wall body used for the steep slope embankment described in paragraph 1,
It constitutes a wall that stands approximately vertically, and has a plurality of cross drainage holes that penetrate the wall in the vertical direction, and a downpipe drainage hole that communicates all of the upper and lower cross drainage holes. A wall body characterized by being formed through the interior thereof. (3) A substantially plate-shaped wall unit used for the steep slope embankment described in paragraph 1, which constitutes a wall of the embankment by connecting a plurality of units by joining at their ends, and At each horizontal end, a pair of transverse drainage grooves are formed by connecting the upper and lower parts to form a transverse drainage hole, and downspout drainage holes that communicate with each of the upper and lower transverse drainage grooves are formed inside. A wall unit characterized by being formed through the wall. (4) A substantially plate-shaped wall unit used for the steep slope embankment described in paragraph 1, in which a plurality of wall units are connected by joining at the ends to constitute an upright embankment wall, and At the four corners, a set of four cross drain holes are formed by connecting the top, bottom, left and right, and at each vertical end on the left and right, a set of two vertical holes are formed by connecting the left and right sides. A wall unit characterized by being formed with a vertical drainage groove that serves as a gutter drainage hole.