JPH03187414A - Steep slope banking - Google Patents

Abstract

PURPOSE:To maintain excellent stability for a long period of time, even if the wall part is steep and high, by embedding the geotextiles laid in the banking materials behind the wall part into selfhardening fixing materials so as to be fixed to each other. CONSTITUTION:In the inside of banking materials 3 stacked on the ground G behind a steep wall part H, geotextiles 2 which have been fixed to the wall part H are nearly horizontally laid leaving a vertical space between them. Then, the geotextiles 2 are adjacently embedded into selfhardening fixing materials 13 in appropriate positions in the banking materials 3 behind the wall part H so as to be fixed to each other. And behind the wall part H, stay bankings 6 which have been structurally integrated with the wall part H in such a state that they have been surrounded by the upper and lower geotextiles are formed. Thus, the earth pressure from the interior of the banking M can be restrained on the inside of the wall part H, enabling the end part of the banking M to be very strongly supported.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a steeply sloped embankment having a steeply sloped wall, and a geotextile is laid in the embankment material behind the steeply sloped wall.

"Conventional technology" M in Figure 7 shows an embankment constructed using the conventional construction method.

That is, in order to create the embankment M, the geotextile 2 is laid on the ground G, and the sandbags 2 forming the wall surface 3a of the embankment M are
After piling up the sandbags 20 in three layers, for example, on top of the geotextile 2, the embankment material 3 is piled up on top of the geotextile 2 and compacted to a predetermined height, and then the end of the geotextile 2 is rolled up to cover the sandbag 20, and then By repeating the above steps and overlapping the sandbags 20 and the embankment material 3 behind them, the sandbags 20 form the wall H and the embankment M behind them is created.

"Problems to be Solved by the Invention" By the way, in the embankment M in which the wall portion is formed using the sandbags 20 as described above, if the height of the embankment M is increased significantly or if the wall surface 3a is steeply sloped, geotextile In addition to the fact that the contact surfaces of the sandbags 2 and 2 are slippery, and the sandbags 20 are not firmly fixed to the geotextile 2, the displacement of the wall surface 3a over time due to the deformation and movement of the sandbags 20 itself becomes large. In the conventional embankment structure,
Since the displacement of the wall surface 3a over time cannot be sufficiently suppressed, problems such as a lack of long-term stability of the embankment M itself may occur.

This invention was made in view of the above circumstances, and has a steeply sloped wall that does not take up much land, and has excellent stability and reliability over a long period of time regardless of its height. The purpose of this project is to provide a steeply sloped embankment that is easy to construct and can shorten the construction period.

"Means for Solving the Problems" The steep slope embankment of the present invention has a steep wall part, a geotextile is laid in the embankment material piled up on the ground behind the steep wall part, and the geotextile is placed in the wall part. A steeply sloped embankment that is anchored to the wall, where the nootextiles that are anchored at spaced positions above and below the wall are close to each other at any position in the embankment material behind the wall. It is embedded in a self-hardening fixing material and fixed therein.

"Function" The steep slope embankment of the present invention has a steep wall part, a geotextile is laid in the embankment material piled up on the ground behind the wall part, and the geotextile is fixed to the wall part and , the geotextiles fixed at spaced apart positions on the top and bottom of the wall are embedded and fixed in a self-hardening material in close proximity to each other at arbitrary positions in the embankment material behind the wall. By doing so, a backfill is formed behind the wall that is structurally integrated with the wall and surrounded by the upper and lower geotextiles, and this backfill is connected to the geotextile in the embankment material behind it. By acting as a huge supported sandbag structure, the backing embankment suppresses the earth pressure from inside the embankment inside the wall and extremely firmly supports the end of the embankment. Therefore, in this steeply sloped embankment, the displacement over time of the outer wall surface of the wall portion becomes extremely small, and its stability becomes extremely high, and the stability of the embankment itself also becomes extremely high.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.

FIG. 1 is a diagram showing an embodiment of a steep slope embankment according to the present invention, and in this figure, reference numeral M indicates an embankment constructed on an existing ground G.

As shown in Fig. 1, this steep-slope embankment consists of embankment material 3 such as earth and sand being compacted onto the ground G, and a plurality of geotextiles 2 in the embankment material 3 are vertically spaced apart. Sandbags 2 are laid apart, and a plurality of sandbags 2 are placed at the ends.
0 are piled up in layers, and the sandbags 20 are substantially overlapped in the vertical direction with a slight incline toward the inside of the embankment to form a steeply sloped wall H.

In this steep slope embankment, each geotextile 2 is laid in a substantially horizontal state at intervals vertically in the embankment material 3 along the top surface of the soil r120 on the ground G and every sixth layer above it. It is temporarily fixed to the embankment material 3 with the U-bin 4 at a position separated by a predetermined distance from the wall H to the rear of the embankment M, and is moved through the embankment material 3 toward the wall H on the side of the wall H from the temporarily fixed position. It is laid diagonally upward, and on the wall H, between the upper and lower sandbags 20 and 20 at a level that is 206 layers of sandbags higher than the level at which the geotextile 2 is laid at the temporary fixing position with the U-bin 4 mentioned above. It's wedged in.

The outer surface of each geotextile 2 is bent downward along the upper end surface of the sandbag 20 below, and the six layers of sandbags 20 below are attached to the outer surface of the wall H. The embankment M is placed along the lower end surface of the lowest sandbag 20 of the six layers of sandbags 20 mentioned above.
The sandbag 20 and the sandbag 20 below are bent inward.
(or ground G).

Further, each of the geotextiles 2 is superimposed on the geotextile 2 laid below between the bottom sandbag 20 and the sandbag 20 below it among the six layers of sandbags 20, Furthermore, the end of the geotextile 2 is temporarily fixed by the U pin 4 at a predetermined distance from the wall H to the rear of the embankment M,
The geotextile 2 temporarily fixed to the above-mentioned U pin 4
It is temporarily fixed to the embankment material 3 by the U-pin 4 while overlapping the lower surface of the middle part, and a self-hardening fixing material 13 is driven at the temporary fixing position by the U-pin 4 to be fixed to the wall part H in a predetermined manner. A fixing section extending horizontally in a strip shape is formed at a distance apart, and the middle part and the lower end of the Noo textile 2 are buried and fixed together with the U-bin 4 in this fixing section. There is.

Therefore, in this steep slope embankment, behind the wall H,
Wall H sandwiched between upper and lower geotextiles 2.2
A retaining embankment 6 is formed that is structurally integrated with the retaining embankment 6, and this retaining embankment 6 acts as a huge sandbag structure supported by the geotextile 2 in the embankment material 3 behind it, so that the retaining embankment 6 becomes an embankment. The edge of the embankment M is extremely firmly supported by suppressing the soil from inside the wall H inside the wall H.

In addition, in this embodiment, the geotextile 2.2, which is sandwiched between the upper and lower sandbags 20.20 in the above-mentioned wall portion H in a state where they are stacked in two layers, is temporarily fixed to the lower sandbag 20 by the U pin 4, and Each of those sandbags 20.20
It is fixed by a self-hardening fixing material 13 interposed therebetween.

Further, among the sandbags 2o in each of the six layers, an anchor 5 is attached between the third layer ±lI20 and the fourth layer sandbag 20. This anchor 5 is made of steel,
For example, as shown in FIG. 2, a rod-shaped base 5a and its base 5
The upper and lower ends of the base 5a are connected to the top of the third layer of soil 1120 and the fourth layer of sandbag 2, respectively.
o, and the above-mentioned hanging part 5b protrudes from between the sandbags 20.2o to the wall surface, and is hung while attracting the geotextile 2 that covers and holds the outer surface of the wall part. are doing.

In addition to the anchor 5 shown in FIG. 2, the anchor 5 shown in FIG. 3 may be used.

This anchor 5 has a base portion 5a and a hooking portion 5b like the anchor 5 shown in FIG. It has a structure in which a stop portion 5b is formed.

The above-mentioned self-hardening fixing material 13 is also filled between the third layer sandbag 20 and the fourth layer sandbag 20, and the self-hardening fixing material 13 and the base portion 5a of the anchor 5 The third and fourth layer sandbags 5.5 and the anchor 5.5 and sandbag 20.20 are fixedly fixed.

As the above-mentioned self-hardening fixing material 13, hard-mixed soil mortar or fill cement, which is made by mixing cement-based hardening agent with earth and sand obtained near the site, is used, as well as hard-mixed concrete such as RCD concrete, lime Mixing treatment reinforcement may be used, or ordinary concrete, mortar, cement paste, or other cement-based solidifying agents, or early-strengthening cement-based solidifying agents such as early-strengthening mortar may be used.

Furthermore, as the geotextile 2, geofabrics such as woven fabrics and nonwoven fabrics or geonets may be used, but preferably geogrids such as so-called polymer grids or fiber grids formed from polymeric materials in a lattice shape are preferably used. Among these geogrids, it is particularly 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-shaped reinforcing material with excellent mechanical properties such as strength, tensile rigidity, shear rigidity, and creep properties.

Next, a method for constructing such a steeply sloped embankment will be explained.

First, as shown in Fig. 5, one end of the geotextile 2 is positioned at a predetermined distance from the planned position for forming the wall H on the existing ground G on which the embankment is to be constructed, toward the inside of the embankment, and With one end of the geotextile 2 temporarily fixed to the ground G by a U-bin 4, the geotextile 2 is laid on the ground G to the side of the wall H, and further extended to the outside of the planned position where the wall H is to be formed. Then, as shown in FIG. soil W20 and third layer sandbag 20
20 sandbags up to the third layer.
Fill the embankment material 3 up to the height of the third layer of sandbags 20 on the ground G behind the wall H formed by the above-mentioned temporary fixing position of the U-bin 4 on the side of the wall H, and fill it as necessary. The embankment material 3 is compacted.

After this, the center of the upper part of the third layer sandbag 20 is recessed in a groove shape along the extending direction of the wall H to form a recess, and the anchor shown in FIG. 2 is inserted into the recess. Insert the base 5a of the anchor 5 and attach its lower end, and attach the hooking part 5b of the anchor 5 to the third layer of soil! With the upper end of I20 protruding toward the wall surface, lift the geotextile 2 extending from below the -th layer sandbag 20 to the outer surface side of the wall H and bend it upward along the lower end surface of the outer surface side of the sandbag 20. By doing so, the sandbags 20 are stood up along the wall surface of the wall H in a state in which the sandbags 20 are kept tightly in contact with the sandbags 20, and
The anchor 5 is hooked onto the hook portion 5b of the anchor 5.

Then, the self-hardening fixing material 13 is further filled into the recess of the third layer sandbag 20, and the fourth layer sandbag 20 is inserted into the upper end of the base 5a of the anchor 5 on the sandbag 20. Layered soil! By recessing the center of the lower surface of I20 into a groove shape and filling the recess with the above-mentioned self-hardening fixing material 13, the fourth layer of sandbags 20 is stacked on top of the third layer of sandbags 20. , each of those sandbags 2
0°20 to the anchor 5 and the self-hardening fixing material 13
Fix it by fixing it.

After doing this, as shown in FIG. 6, the fifth layer of sandbags 20 and the sixth layer of sandbags 20 are stacked in a staggered manner on top of the fourth layer of sandbags 20 described above. At the same time, the embankment material 3 is further piled up on the embankment material 3 behind the wall H formed by the sandbags 20 up to the sixth layer, and the upper surface of the embankment material 3 is moved from the wall H side to the temporary fixing position of the U pin 4. A retaining embankment 6 having a triangular cross-section slanting diagonally downward is formed, and the retaining embankment 6 is further compacted.

Furthermore, since the above-mentioned backing embankment 6 is a part where compaction is likely to be insufficient, it is desirable to use good quality sandy soil as the embankment material 3 for this part. When used, a drainage layer made of a sandy layer or a drainage sheet (such as a nonwoven fabric sheet) may be provided along the lower surface of the geotextile 2 as a drainage means for draining water from the retaining earth 6.

After doing this, the end of the geotextile 2, which is hung by the above-mentioned anchor 5, is lifted up and raised along the wall surface of the wall H consisting of the sandbags 20 up to the sixth layer, and The geotextile 2 is bent toward the inside of the embankment along the upper end surface of the sandbag 20 to cover the sixth layer of the sandbag 20, and the U-bin 4 is placed over the top of the geotextile 2 and onto the top of the sandbag 20. The geotextile 2 is fixed to the sandbag 20 by inserting the geotextile 2 into the sandbag 20, and the geotextile 2 is made to cover the upper surface of the backing embankment 6 and extend to the temporary fixing position of the U pin 4 in the ground G, and further,
The end of the geotextile 2 is temporarily fixed on the ground G in a state where it is superimposed on the middle part of the geotextile 2 on the ground G by replacing the U pin 4 at the temporary fixing position of the U pin 4.

Then, after fixing the geotextile 2 at the same position as the temporary fixing position of the U pin 4 on the ground G with the middle part and end part of the geotextile 2 overlapped, the U pin 4 is
By placing the self-hardening fixing material I3 at a fixed position,
A fixing section is formed that extends horizontally in a strip shape along a position separated from the wall H by a predetermined distance, and the U pin 4 is attached to the middle part of the geotextile 2 and the lower end thereof to the fixing section.
Bury the whole thing and let it settle.

After doing this, as shown in FIG.
By piling up the embankment material 3 behind and then rolling the embankment material 3, a -th embankment layer is formed. Then, one end of a geotextile 2 other than the geotextile 2 is located at a predetermined distance from the wall H on this −th embankment layer toward the inside of the embankment, and one end of the geotextile 2 is is temporarily fixed on the embankment layer with U pin 4,
The geotextile 2 is laid on the wall H side, and with the geotextile 2 partially overlapped on the geotextile 2 on the sixth layer sandbag 2o, one end of the geotextile 2 is placed on the sixth layer. The wall portion H of the sandbag 20 is made to extend toward the outer surface side.

After doing this, the two geotextiles 2.2 superimposed on the sixth layer of sandbag 20 are replaced with the U-bin 4 in which the -th layer of geotextile 2 is temporarily fixed on top of the sandbag 20. While fixing the soil! 12
A recess is formed in the center of the top of the geotextile 0, and while filling this recess with the self-hardening fixing material 13 to the extent that the top surface of the geotextile 2 is covered, the seventh layer of sandbags 20 is stacked on top of the sandbag 20, and the self-hardening fixing material is filled. 13 is sandwiched between each upper and lower sandbag 20.20.

In this way, the seventh layer of soil 11f is placed on the sixth layer of sandbags 20.
After arranging a plurality of sandbags 20 in a row, as shown in FIG. The ground G behind the wall H formed by the sandbags 20 up to
Embankment material 3 is piled up to the height of the ninth layer of sandbags 20 on the side of wall H from the temporary fixing position of the above U-pin 4, and the embankment material 3 is compacted as necessary.

After doing this, the center of the upper part of the ninth layer sandbag 2o mentioned above is recessed in the shape of a groove along the extending direction of the wall part 4 to form a recess, and the base 5a of the anchor 5 is inserted into the recess. Insert the lower end and attach the hook 5 of the anchor 5.
With b protruding 2 degrees from the top of the ninth layer of sandbag toward the wall, the seventh layer of soil! By lifting the geotextile 2 extending from below I20 toward the outer surface of the wall H and bending it upward along the lower end surface of the outer surface of the sandbag 2o, the sandbag 2o can be tightly fitted along the wall surface of the wall H. The anchor 5 is held in contact with the anchor 5 and then raised, and is hooked onto the hook portion 5b of the anchor 5.

Then, the self-hardening fixing material 13 is further filled into the recess of the ninth layer sandbag 20, and the tenth layer sandbag 20 is inserted into the upper end of the base 5a of the anchor 5 on the sandbag 20, and Layered soil! By stacking the tenth layer sandbag 20 on top of the ninth layer sandbag 20 with the center of the lower surface of the sandbag 120 made into a groove so that the inside of the recess is filled with the above-mentioned self-hardening fixing material I3. , each of those sandbags 2
0.20 for the anchor 5 and the self-hardening fixing material 13
Fix it by fixing it.

In this way, the process similar to the above-mentioned process is repeated, and the second and third embankment layers and the upper embankment layer are sequentially formed on the -th embankment layer. ,
By stacking six layers of sandbags 20 in parallel at the end of each embankment layer, an embankment M as shown in FIG. 1 is created in parallel with the wall H thereof.

In addition, in the case of this embodiment, the lower geotextile 2 may be laid longer toward the rear of the embankment M in the anchoring part, and the ends of the geotextile 2 may be overlapped on the upper side. good.

FIG. 9 is a diagram showing a steep slope embankment according to a second embodiment of the present invention, in which a third embankment layer is created. Similarly, each geotextile 2, which is laid substantially horizontally in the embankment material 3 at intervals above and below, is constructed of sandbags 20 in every sixth layer from the bottom on the wall H, and the soil above them! I20, each of these geotextiles 2 is placed in the wall H with the six layers of sandbags 20 below it being put together.
It is attached along the outer surface of the

However, in this steeply sloped embankment, as shown in FIG.
One end of the geotextile 2, which is sandwiched under the embankment M and extends to the inside of the embankment M, is laid obliquely upward toward a position a predetermined distance away from the wall H to the rear of the embankment M. At that position, it is temporarily fixed to the embankment material 3 by the U pin 4 in a state that it is overlapped under the middle part of the geotextile 2, and the middle part of the geotextile 2 and the end below it are fixed together with the U pin 4. is buried in a fixing material made of the self-hardening fixing material 13, and when building such a steep slope embankment, for example, the construction of the third embankment layer is shown in FIG. 9. To explain, sandbags are stacked up to the height of the third embankment layer in advance and wall H is
At the same time, embankment materials 3 are piled up on the embankment layers up to the second layer behind the wall H, except for the triangular cross-sectional part where the backing embankment 6 is to be formed. , and six layers of soil from the outside of the wall H! It is preferable that both sides of the geotextile 2 attached to the earthen wall 120 are rolled up so as not to interfere with the embankment work of the embankment M, and each is tied to the inside of the sandbag 20 using U pins 4, clips 7, etc.

In this second embodiment as well, the lower geotextile 2 may be laid longer toward the rear of the embankment M in the fixing section, and the ends of the geotextile 2 may be overlapped on the upper side. good.

FIG. 1O is a diagram showing a steep slope embankment according to a third embodiment of the present invention.

The steep slope embankment of this embodiment, like the steep slope embankment of the first embodiment and the steep slope embankment of the second embodiment, has a plurality of geotextiles 2 on the ground G and in the embankment material 3 thereon at vertical intervals. Each geotextile 2 is sandwiched between each sandbag 20 of every sixth layer from the bottom and the sandbag 20 above it on the wall H, and each of the six layers is laid together in a substantially horizontal state. A geotextile 2 is attached to the sandbag 20 along the outer surface of the wall H.

However, in this steep embankment, as shown in Figure 10,
It is laid in a substantially horizontal state in the embankment material 3 behind the wall H in a state where it is sandwiched between the sandbags 20 of every sixth layer from the bottom and the sandbags 20 above it. The geotextile 2 and the geotextile 2 laid diagonally downward from the top of the six layers of sandbags 20 above it to the inside of the embankment M, and the embankment from the bottom of the six layers of sandbags 20 below the geotextile 2. A geotextile 2 laid obliquely upward toward the inside of the M is fixed to a fixing section made of a self-hardening fixing material 13 formed along a position spaced apart from the wall H by a predetermined pressure.

FIG. 11 is a diagram showing a steep slope embankment according to a fourth embodiment of the present invention.

The steep slope embankment of this embodiment is similar to the steep slope embankment of the first embodiment, in which a plurality of geotextiles 2 are laid on the ground G and in the embankment material 3 thereon in a substantially horizontal state at intervals vertically. Each geotextile 2 has a sandbag 20 on every sixth layer from the bottom and a sandbag 20 above it on the wall H.
20 sandbags sandwiched between the
A geotextile 2 is pasted along the outer surface of the wall H.

However, in this steeply sloped embankment, as shown in Figure 11,
The geotextile 2, which is wrapped around the lower six layers of sandbags 20 and sandwiched between the upper sandbags 20, 20, is wrapped around the upper six layers of sandbags 20 and sandwiched between the above sandbags 20, 20. It extends approximately horizontally for a predetermined distance to the inside of the embankment M along the lower side of the inserted geotextile 2, and the U pin 4 and the self-support It is fixed and fixed in the embankment material 3 by the hard anchoring material 13, and is laid diagonally downward from that position to the inside of the embankment M, and the end thereof is overlaid on the upper side of the geotextile 2 below. 4 and the self-hardening fixing material 13, the geotextile 2 is fixed behind the wall H.
The cross-sectional shape of the retaining embankment 6 formed between the upper and lower sides is not triangular but rectangular.

In addition, according to the steep slope embankments of the first, second, third, and fourth embodiments described above, behind each of the six layers of sandbags 20 that are stacked vertically to form the wall H, A retaining embankment 6 is formed which is structurally integrated with the six layers of sandbags 20 while being surrounded from above and below by the geotextile 2,
This backing embankment 6 acts as a huge sandbag supported by the geotextile 2 in the embankment material 3 behind it, and the upper and lower six layers of sandbags 20 are fixed and fixed to each other by the self-hardening anchoring material 13. Therefore, the upper and lower huge sandbags formed by the above-mentioned backing embankment 6 are integrated and act as a huge sandbag structure,
As a result, the huge sandbag structure suppresses the earth pressure from inside the embankment M on the inside of the wall H, and supports the end of the embankment M extremely firmly.

FIG. 12 is a diagram showing a steeply sloped embankment according to a fifth embodiment of the present invention, and the figure shows the construction of the third embankment layer.

In the steep slope embankment of this embodiment, instead of using the sandbags 20 as in the above-mentioned embodiments, a plurality of wall units 8 are connected at the upper, lower, left and right ends, and the lower part is attached to the foundation 9 to form a wall. H is configured.

In this steep slope embankment, the anchoring joint metal fitting IO attached to the foundation 9 and the upper rib of the wall unit 8
, the geotextile 2 is laid in a substantially horizontal state in the embankment material 3 behind the wall H through the self-hardening fixing material 13, and another geotextile is placed on the end of the geotextile 2 in each self-hardening fixing material 13. The geotextile 2 is fixed in the self-hardening fixing material 13 with one end of the geotextile 2 overlapped with the U pin 4, and the geotextile 2 is laid diagonally upward toward the inside of the embankment M, and the geotextile 2 is 2
The other end of the U
It is fixed and fixed by the pin 4 and the self-hardening fixing material 13, and thereby the geotextile 2 in the above-mentioned inclined state
A retaining embankment 6 having a triangular cross section is formed on the side of the wall H.

When constructing such a steeply sloped embankment, for example, the construction of the third embankment layer will be explained with reference to FIG. 12.The wall unit 8 is assembled on the foundation 9 in advance, H is formed, and the embankment material 3 is held on the embankment layer up to the second layer behind the wall H, excluding the triangular cross-sectional part where the backing embankment 6 is to be formed. The geotextile 2 for forming the backing embankment 6, which is fixed and fixed to the fixing joint fitting 10 inside the wall H located at the top of the second embankment layer via a self-hardening fixing material, is rolled up by the clip 7. In this state, use another clip 7 to attach the fixing joint metal fitting I on the inside of the wall part ■4 located at the top of the third embankment layer.
It is tied to O so that it does not interfere with the construction of embankment M.

FIG. 13 is a diagram showing a steeply sloped embankment according to a sixth embodiment of the present invention.

In the steep slope embankment of this embodiment, the wall portion H is formed of cast-in-place concrete.

In this steeply sloped embankment, fixing joint fittings 10 are attached to the inside of the wall H at equal intervals up and down, and the geotextile 2 is attached to each of these fixing fittings 10 via a self-hardening fixing material 13. The self-hardening anchoring materials 13 are laid in a substantially horizontal state in the embankment material 3 behind H, and two different self-hardening anchoring materials 13 are placed on the upper and lower ends of the above-mentioned substantially horizontal geotextile 2, respectively. Geotextile 2.
2 are embedded with one end thereof overlapped. Of the two geotextiles 2, the upper geotextile 2 is laid obliquely upward toward the inside of the embankment M, and the other end is overlapped with the lower side of the substantially horizontal geotextile 2 above it. The geotextile 2 on the lower side is laid in an inclined state diagonally downward to the inside of the embankment M, and the other end is By being fixed and fixed by the U-bin 4 and the self-hardening fixing material 13 in a superimposed state on the upper side of the substantially horizontal geotextile 2 below, the wall H side of each of the geotextiles 2', 2 in the above-mentioned inclined state An embankment 6 having a triangular cross section is formed in the area.

In addition, according to the steep slope embankments of the fifth and sixth embodiments described above,
Behind the wall H formed of precast concrete or cast-in-place concrete, there are a plurality of retaining embankments 6 that are structurally integrated with the wall H while being surrounded by upper and lower geotextiles 2 and adjacent to each other vertically. formed,
These retaining embankments 6 act as gigantic sandbags supported by the geotextile 2 in the embankment Its behind, and the upper and lower gigantic sandbags formed by the retaining embankments 6 are also integrated into a gigantic sandbag. Since the huge sandbag structure acts as a sandbag structure, the earth pressure from inside the embankment M is suppressed inside the wall H, and the end of the embankment M is extremely strongly supported.

"Effect of the invention" According to the steep slope embankment of this invention, it has a steep wall part,
A geotextile is laid in the embankment material piled up on the ground behind it, and the geotextile is fixed to the above-mentioned wall, and each geotextile is fixed at each position spaced apart above and below the wall. They are embedded and fixed in the self-hardening anchoring material in close proximity to each other at arbitrary positions in the embankment material behind the wall, so that they are surrounded by the upper and lower geotextiles behind the wall. A retaining embankment is formed that is structurally integrated with the wall, and this retaining embankment acts as a huge sandbag structure supported by the geotextile in the embankment material behind it, thereby preventing water from inside the embankment. The earth pressure is suppressed inside the wall and the edge of the embankment is extremely strongly supported. Therefore, in this steeply sloped embankment, the displacement over time of the outer wall surface of the wall portion becomes extremely small, and its stability becomes extremely high, and the stability of the embankment itself also becomes extremely high.

Therefore, with this steeply sloped embankment, sufficient stability is ensured even if the wall is sloped to a steeper slope than the three-division method (glue), which was impossible to achieve with conventional embankments.

In addition, with this steep slope embankment, the increased stability of the walls increases the rigidity of the entire embankment, which reduces the amount of embankment settlement and effectively reduces ground surface deformation due to uneven settlement. This contributes to improving the construction quality of the embankment, and creates an embankment structure with excellent load dispersion effects because the embankment, geotextile, and wall can work together as one.
From this point of view as well, deformation of the embankment is effectively suppressed to prevent collapse of the embankment, contributing to safety, construction reliability, and durability.

Therefore, when creating such a steeply sloped embankment, it is possible to efficiently utilize the limited site and make effective use of the embankment area, and in addition to being simple in construction, Since it is possible to ensure excellent construction quality, stability, and reliability of construction over a long period of time regardless of the height of the embankment, it has an extremely large contribution to make in the construction industry.

[Brief explanation of drawings]

1 to 8 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is a side sectional view of the end of a steep slope embankment, and FIG.
The figure is a perspective view showing an example of an anchor used in a steep slope embankment.
Figure 3 is a perspective view showing another example of an anchor, Figure 4 is a vertical sectional view of the wall, Figure 5 is a side sectional view showing the fourth layer of sandbags stacked up, and Figure 6 is a perspective view showing another example of an anchor. Figure 7 is a side sectional view showing the formation of up to the sixth layer of sandbags and the backing embankment behind it, Figure 7 is a side sectional view showing the formation of the sandbags up to the seventh layer and the first embankment layer, and Figure 8. The figure is a side sectional view showing the tenth layer of sandbags stacked up. FIG. 9 is a diagram showing a steeply sloped embankment according to a second embodiment of the present invention, and is a side sectional view showing the construction of the third embankment layer. FIG. 10 is a side sectional view of the end of a steeply sloped embankment according to a third embodiment of the present invention. FIG. 11 is a side sectional view of the end of a steeply sloped embankment according to a fourth embodiment of the present invention. FIG. 12 is a diagram showing a steeply sloped embankment according to a fifth embodiment of the present invention, and is a side sectional view showing the construction of the third embankment layer. FIG. 13 is a side sectional view of the end of a steeply sloped embankment according to a sixth embodiment of the present invention. FIG. 14 is a side sectional view of the end of a conventional embankment. 3... Embankment material, 4... U pin, 5... Anchor 6... Retaining embankment, 7... Clip, 8... ... Wall unit, 9 ... Foundation, ■0 ... Fixing joint fittings, 13 ... Self-hardening fixing material, 15 ... 5 pin, 16 ... Geotextile, 20 ... Sandbag, G ... Ground, M ... Embankment, H ... Wall.

Claims (1)

[Claims] A steeply sloped embankment having a steeply sloped wall, in which a geotextile is laid in an embankment material piled up on the ground behind the wall, and the geotextile is fixed to the wall,
The geotextiles fixed at respective positions spaced apart above and below the wall are embedded and fixed in a self-hardening material in close proximity to each other at arbitrary positions in the embankment material behind the wall. A steeply sloped embankment characterized by