JPH03180617A - Bank of sharp gradient - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a steeply sloped board in which a steeply sloped wall portion is formed by stacking one summer's top in a layered manner.

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

In other words, 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 placed on top of the ground G.
After cleaning the soil in three layers, for example, at a time, 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. Then, by repeating the above steps and superimposing the sandbag 20 and the embankment material 3 behind it, the wall 1-1 is formed by the sandbag 20 and the embankment M behind it 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 slippery contact surfaces of the sandbags 2 and 2, 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 embankment itself increases, but in this case, with such a conventional embankment structure, it is not possible to sufficiently suppress the displacement of the wall surface 3a over time, so the stability of the embankment M itself There is a risk that problems such as lack of quality 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 over a long period of time regardless of its height. The purpose is to construct a steeply sloped embankment as an embankment, which is easy to construct and can shorten the construction period.

A steep slope embankment of the present invention includes embankment materials piled up on the ground, a plurality of sandbags piled up in layers at the end thereof to form a wall portion, and the above-mentioned A plurality of geotextiles are laid at intervals vertically in the embankment, and each of the geotextiles wraps the above-mentioned sandbags in several layers from the outside side of the wall to cover it, and one end of the geotextile The geotextile and the geotextile laid above or below are sandwiched between the upper and lower sandbags, and are fixed by a self-hardening fixing material interposed between the sandbags.

"Function" In the steep slope embankment of the present invention, each geotextile laid vertically at intervals in the embankment material wraps several layers of sandbags on the wall part from the outside surface of the wall part, and covers it. One end of the geotextile and the geotextile laid above or below it are sandwiched between the upper and lower sandbags, and fixed using a self-hardening fixing material interposed between the sandbags. As a result, the geotextiles on the outer side of the wall are attracted to the outer wall surface, the slack is adjusted, and the geotextiles are made to adhere to each other, and the self-hardening material bonds the geotextiles above and below each other and each other. The shifting of the sandbags from each other is completely prevented, and the temporal displacement of the outer wall surface due to deformation or movement of the sandbags themselves is extremely small, and the stability of the wall is therefore extremely high.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

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.
The sandbags 20 are piled up in layers, and the sandbags 20 are substantially overlapped in the vertical direction with a slight inclination toward the inside of the embankment, forming a steeply sloped wall section (■).

Each of the above-mentioned geotextiles 2 extends approximately horizontally toward the rear of the embankment M along the ground G and the upper part of the sandbags 20 of every fourth layer from the bottom stacked on top of the ground G. nW sandbags 20, bent upward at the lower end of each sandbag 20 on the outer wall side,
The four layers of sandbags 20 above are wrapped together, and the top of the four layers of sandbags 20 bends toward the inside of the embankment M, and the soil! 12
0 and the sandbag 20 above it, with its end portion overlapped with the geotextile 2 above. And each of those geotextiles 2.2 is U
Self-hardening fixing material fixed to the lower sandbag 20 by mold pins 1 and interposed between the upper and lower sandbags 20 and 20! It is established by 3.

An anchor 5 is attached between the second layer sandbag 20 and the third layer sandbag 20 of each of the four layers of sandbags 20. The anchor 5 is made of steel and has a substantially J-shape, for example, as shown in FIG. , the upper and lower ends of the base 5a are the upper part of the second layer sandbag 20 and the third layer sandbag 2, respectively.
0, and the above-mentioned hanging part 5b protrudes from between the sandbags 20 and 20 to the wall surface, and attracts the geotextile 2 that covers and holds the outer surface of the wall part. It's stuck on. 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.

And between the second layer sandbag 20 and the third layer sandbag 20 is the above-mentioned self-hardening fixing material! 3, and the second and third layer sandbags 5.5 and the anchor 5.5 and the sandbag 20° 20 are fixed and fixed by this self-hardening fixing material 13 and the base 5a of the anchor 5. has been done.

As the above-mentioned self-hardening fixing material 13, hard-mixed fill mortar or fill cement made by mixing a cement-based hardening agent with earth and sand obtained near the site, 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 ura 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, a geotextile 2 is laid on the existing ground G on which the embankment M is to be created, and one end of the geotextile 2 is placed at the position where the wall I is to be constructed. Then, the earthwork materials 3 are successively piled up on the geotextile 2 from the rear to the front, until the wall H on the geotextile 2 is located at the position where it is to be constructed. By arranging a plurality of first-layer sandbags 20 in a bent manner and stacking the second-layer sandbags 20 in a staggered manner on top of the first layer of sandbags 20, as shown in FIG. The formation of wall part II and the filling of embankment material 3 on the ground G behind it were performed in parallel, whereby the first embankment layer described later was formed in advance to half the height, and then, The upper part of the filled embankment material 3 is rolled 4 degrees.

After doing this, the second layer of soil mentioned above! The center of the upper part of 120 is recessed in the shape of a groove along the extending direction of wall part ■4 to form a recess, and the soil! ! For example, insert the base 5a of the anchor 5 shown in FIG.
The above-mentioned first layer of soil is in a state where it protrudes from the top end of 0 to the wall surface! Lift up the geotextile 2 extending from below I20 to the outer surface of wall H and bend it upward from the lower end of the first layer of soil 920! '11], the wall part (4) is raised along the wall surface of the wall part (4) in a state in which it is stuck tightly in contact with the soil 1120, and the hanging part 5b of the anchor 5 is
Let it hang on. And then there's the second layer of soil! I20
At the same time, a third layer of sandbag 20 is inserted into the upper end of the base 5a of the anchor 5 on the sandbag 20, and the center of the lower surface of the third layer of sandbag 20 is in the groove. The third layer of sandbag 20 is filled with the above-mentioned self-hardening fixing material 13, and then the third layer of sandbag 20 is filled with the second layer of soil! By stacking them on I20, each of the sandbags 20.20 is fixed and fixed by the base 5a of the anchor 5 and the self-hardening constant Mu I3.

After doing this, further embankment materials 3 are successively piled up from the back to the front on top of the embankment material 3 that has been filled to half the height of the first embankment layer described above, as shown in Fig. 6. By stacking the fourth layer of sandbags 20 on top of the third layer of sandbags 20 described above in a staggered manner as shown in FIG.
The formation of the wall H using the sandbags 20 up to the fourth layer and the filling of embankment material 3 onto the ground G behind it are performed in parallel, thereby forming the first embankment layer to be described later.
The top of each embankment layer is compacted.

After forming the -th layer of embankment in this way, lift the end of the geotextile 2 suspended by the above-mentioned anchor 5 and stand it up along the wall surface of the wall H made of soil lA20 up to the fourth layer. The ends of the geotextile 2 are raised and bent toward the inside of the embankment M along the upper end surface of the fourth layer sandbag 20 so that the end of the geotextile 2 is covered with the upper surface of the fourth layer sandbag 20. It is extended onto the upper surface of the wall H of the embankment layer and temporarily fixed with a U-shaped pin 4.

After doing this, the upper center of the fourth layer sandbag 20 is recessed to form a recess, and a geotextile 2 other than the above geotextile 2 whose end is exposed above the sandbag 20 is placed. Lay it on the first embankment layer mentioned above,
With the geotextile 2 partially overlaid on the geotextile 2 on the fourth layer of soil i20, one end of the geotextile 2 is attached to the fourth layer of sandbag 2.
0 by a predetermined length. After doing this, the two layers of geotextile 2.2 stacked on top of the fourth layer of sandbags 20 are placed on top of the soil! While replacing and fixing the U-pin 4 to which the -th layer of Nootextile 2 is temporarily attached to the upper part of I20, a recess is formed in the center of the upper part of the sandbag 20, and the self-hardening fixing material 13 is placed in this recess. The fifth layer of soil is placed on top of the sandbag 20 while filling it to the extent that the top surface of the sandbag is covered! 20 are piled up and the self-hardening fixing material 13 is interposed between each of the upper and lower sandbags 20 and 20.

After doing this, by repeating the same process as explained above, the second and third layers of embankment and the upper layer of embankment are placed on top of the first layer of embankment. Four layers of soil are formed at the end of each embankment layer in sequence! 120 in parallel, an embankment M as shown in Fig. 1 is created in parallel with the wall H.

According to the steep slope embankment of this embodiment, the geotextile 2 is laid in the embankment material 3, and the sandbags 20 stacked in layers at the ends of the earthbags 20 are grouped into four layers by the geotextile 2. The ends of the geotextile 2 are sandwiched between the upper and lower sandbags 20120 and fixed to the sandbags 20 with U-shaped pins 4, and the upper and lower sandbags 20.20
The upper and lower geotextiles 2 are fixed and fixed to each other by the self-hardening fixing material 13, and the 6 soils of the above four layers are fixed together! 20 middle-layer sandbags out of 120.
20 is fixed by the anchor 5 and the self-hardening fixing material 13, and the geotextile 2 on the wall surface of the wall 11 is attracted to the wall H and can be properly adjusted so that there is no slack during construction. Displacement over time such as displacement and deformation of I20 is prevented, and the stability of the wall portion H is extremely increased.

"Effects of the Invention" According to the steep slope embankment of the present invention, the embankment material is piled up on the ground, and a plurality of sandbags are piled up in layers at the end thereof to form a wall part, and the embankment material is A plurality of geotextiles are laid vertically at intervals, and each geotextile wraps the sandbags in several layers from the outside of the wall to cover them, and one end of the geotextile and the upper or The Nootextile laid down below is sandwiched between the upper and lower sandbags, and is fixed by the self-hardening material interposed between the sandbags, so that the wall surface of the wall is fixed. The geotextile is attracted to the wall and aligned in a perfectly adjusted state with no slack, and the self-hardening material prevents the sandbags above and below the sandbags and the geotextiles above and below from shifting or deforming from each other. This prevents deformation over time, resulting in increased stability of the wall. For this reason, with this steep slope embankment, 3.
Sufficient stability will be ensured even if the wall is sloped to a steeper slope than the slope.

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, as well as creating an embankment structure with excellent load fraction effects as the embankment, geotextile, and wall can work together as one.
From this point of view as well, it effectively suppresses the deformation of the embankment, prevents the embankment from collapsing, and contributes to safety and construction reliability.

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]

Figures 1 to 6 are views showing one embodiment of the present invention, in which Figure 1 is a side sectional view of the end of a steeply sloped embankment, and Figure 2 is an example of an anchor used in a steeply sloped embankment. Fig. 3 is a perspective view showing another example of an anchor, Fig. 4 is a vertical cross-sectional view of a wall, and Fig. 5 is a perspective view of a steep slope embankment up to half the height of the first embankment layer. FIG. 6 is a side sectional view showing the stage in which the first embankment layer has been formed in the steep slope embankment construction process. FIG. 7 is a side sectional view of the end of a conventional embankment. 3... Embankment material, 4... U-shaped pin, 5... Anchor 13... Self-hardening fixing material, 15... Pin, 16... Geotextile, 20... Sandbag, 21... Foundation, G... Ground, M... Embankment, 1]... ...Wall section.

Claims (1)

[Claims] Embankment material is piled up on the ground, and a plurality of sandbags are piled up in layers at the end thereof to form a wall, and a plurality of geotextiles are laid vertically at intervals in the embankment material, Each of these geotextiles wraps several layers of the sandbags together from the outside of the wall and covers them.
In addition, one end of the geotextile and the geotextile laid above or below it are sandwiched between the upper and lower sandbags, and the self-hardening anchorage material is inserted between the sandbags. Steep slope embankment characterized by being firmly established.