JP3563381B2 - Slope stabilization method and slope stabilization structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and structure for stabilizing a slope by reinforcing a slope such as an embankment, a cut, a natural slope, etc., and inserts a pressing member installed on the slope into the ground by penetrating the pressing member. The present invention relates to a method of stabilizing the ground by fixing to a slope with an anchor material such as an anchor or a rock bolt.
[0002]
[Prior art]
As a method of reinforcing slopes such as embankments, cuts, and natural slopes, for example, a method of fixing a cross-shaped concrete block to a slope with an anchor has been proposed in recent years and has been widely adopted in practice.
[0003]
Also, in view of the fact that concrete blocks are heavy in weight, Japanese Patent Application Laid-Open No. H11-158877 proposes a lightweight pressing member made of cast iron in order to improve workability.
[0004]
[Problems to be solved by the invention]
On the other hand, there has been a demand for greening the slope as much as possible in accordance with recent changes in environmental consciousness.
[0005]
Therefore, an object of the present invention is to provide a slope stabilization method and a structure thereof that hide a pressing member that tends to give an artificial sensation, and that does not cause runoff or collapse of a material forming a coating layer.
[0006]
[Means for Solving the Problems]
The present invention that has solved the above problems is as described below.
<Invention according to claim 1>
A method of stabilizing the ground by fixing the pressing member installed on the slope to the slope by penetrating the anchor material into the center and inserting it into the ground and fixing the head thereof,
The pressing member has a bottom plate portion facing the slope, and a central reinforcing rib portion at a central portion and a reinforcing rib portion at a peripheral portion thereof, which protrude toward the near side, respectively, and these are integrated. Formed
And it is a member that presses against the slope and is fixed in a tension state by the anchor material, and the tension of the anchor acts on the bottom plate portion,
A plurality of the pressing members are arranged at intervals and fixed to the slope, respectively, and the whole including the peripheral portion or the central portion, and the permeable fiber covering and covering the slope between the pressing members. A slope stabilization method characterized by forming a coating layer mixed with water and planning vegetation.
[0007]
(Effect)
The ground member is stabilized by fixing the pressing member installed on the slope surface to the slope surface with an anchor material penetrating through the member and inserted into the ground surface. Here, in the present invention, particularly as the pressing member,It has a bottom plate facing the slope, a central reinforcing rib at the center, and a reinforcing rib at the periphery, each of which protrudes toward the front, and are formed integrally with each other.Since it is used, it is lighter than a concrete block, the load of transportation is reduced, and the workability at the time of installation can be improved.
[0008]
In the present invention,A plurality of the pressing members are arranged at intervals and fixed to the slope, respectively, and the whole including the peripheral portion or the central portion, and the permeable fiber covering and covering the slope between the pressing members. To form a coating layer mixed with and promote vegetation. Greening can also be achieved in the installation region of the pressing member, so that the pressing member is inconspicuous or hidden by plants and the presence of the pressing member cannot be recognized.
[0009]
And characteristically,Central reinforcing ribs at the center and reinforcing ribs at the peripheryIs projected toward the front side, so that it becomes a wall of the material for forming the coating layer, so that the flow of the material for forming the coating layer is prevented. On the other hand, as long as the concrete block is used, even if the covering layer is formed so as to cover the upper surface, it is easily speculated that the upper surface of the concrete block becomes a slipping surface and easily runs off during rainfall. I can do it. The effect is remarkable when the reinforcing rib portion has a plate shape.
[0010]
When a concrete block is used, the top surface of the concrete block needs to be thickly coated in order to prevent the runoff of the coating layer. And has an excellent runoff prevention effect, so that the thickness of the coating layer can be reduced. Therefore, the amount of the coating layer forming material used is reduced, which is economical.
In addition,By forming a water permeable hole that passes through the back surface of the bottom plate, it is possible to prevent plants from withering.
[0011]
On the other hand, since the entire pressing member is covered and covered by the coating layer, when the pressing member is made of metal such as cast iron, the coating layer exhibits a rust-preventive effect, which is preferable.
[0012]
<Invention according to claim 2>
The fiber is a continuous filamentThe slope stabilization method according to claim 1.
[0013]
(Effect)
When continuous long fibers are mixed, the effect of preventing runoff becomes high. That is, since the soil adheres to the continuous fibers and is held by the frictional force, the runoff of the soil is prevented.
[0014]
<Invention of Claim 3>
The fiber is short or longThe slope stabilization method according to claim 1.
[0015]
<Invention of Claim 4>
The slope stabilization method according to any one of claims 1 to 3, wherein the covering layer is formed by forming a permeable guest soil layer and a surface layer thereon.
[0016]
(Effect)
Due to the formation of the permeable soil layer and the surface layer, respectively, the greening can be surely achieved even in the installation region of the pressing member, and the pressing member is inconspicuous or hidden by plants so that the presence of the pressing member can not be recognized .
[0017]
<Invention according to claim 5>
The soil layer has a permeability of 10^-Fivecm / sec or more soil cement, and the surface layer is an organic growth base layerClaim 4The slope stabilization method described.
[0018]
(Effect)
When soil cement is used in forming the soil layer, the dispersion of particles can be substantially prevented, there is almost no runoff, and the water permeability is 10%.^-FiveWhen the soil cement is at least cm / sec and the surface layer is an organic growth base layer, the growth conditions of the plant are sufficient.
[0019]
<Invention of claim 6>
At least one of the soil layer and surface layer6. The fiber according to claim 4, wherein a fiber is mixed.The slope stabilization method described.
[0020]
(Effect)
When continuous fibers are mixed into at least one of the soil layer and the surface layer, the effect of preventing runoff becomes high. That is, since the soil adheres to the continuous fibers and is held by the frictional force, the runoff of the soil is prevented.
[0021]
<Invention of claim 7>
An annular central reinforcing rib portion at a central portion of the pressing member, and a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center are integrated with the bottom plate portion. The central reinforcing rib portion is a fixing portion of the head of the anchor,
The radiation reinforcing rib portion and the central reinforcing rib portion form a substantially endless annular wall, and a covering layer is formed in a space open upward surrounded by the annular wall.Claims 1-6The slope stabilization method according to any one of the above.
[0022]
(Effect)
By forming an annular central reinforcing rib portion at the center of the pressing member and forming a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center. Thus, the pressing member has a proof stress capable of withstanding a large anchor load. In this case, the radiation reinforcing rib portion and the central reinforcing rib portion form a substantially endless annular wall, and by forming a coating layer in a space open upward surrounded by the annular wall, The runoff of the coating layer can be prevented.
[0023]
<Invention of Claim 8>
An annular central reinforcing rib portion at a central portion of the pressing member, and a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center are integrated with the bottom plate portion. The central reinforcing rib portion is a fixing portion of the head of the anchor,
The radial reinforcing rib portion extends substantially continuously from the intersection with the central reinforcing rib portion in the radial direction toward the end while gradually reducing the overhang height.Claims 1-7The slope stabilization method according to any one of the above.
[0024]
(Effect)
When the radial reinforcing rib portion extends substantially continuously from the intersection with the central reinforcing rib portion in the radial direction while gradually decreasing the projecting height toward the end, the coating formed outside the pressing member The layer and the coating layer formed on the radiation reinforcing rib portion can be made continuous or connected.
[0025]
<Invention according to claim 9>
The pressing member installed on the slope is a structure fixed to the slope by inserting the anchor material in the center part and inserting it into the ground to fix the head,
The pressing member has a bottom plate portion facing the slope, and a central reinforcing rib portion at a central portion and a reinforcing rib portion at a peripheral portion thereof, which protrude toward the near side, respectively, and these are integrated. Formed
And it is a member that presses against the slope and is fixed in a tension state by the anchor material, and the tension of the anchor acts on the bottom plate portion,
A plurality of the pressing members are arranged at intervals and are respectively fixed to the slopes, and the entirety including the entire peripheral portion or the central portion, and the water-permeable fibers covering and covering the slopes between the pressing members. A slope stabilizing structure, wherein a mixed coating layer is formed and vegetation is achieved.
(Effect)
The same operation and effect as those of the first aspect are obtained.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
<Embodiment of construction>
FIG. 1 shows a cross-sectional view of the first embodiment. That is, the pressing member 10 installed on the slope G is fixed to the slope G by the anchor material 1 penetrating therethrough and inserted into the ground, thereby stabilizing the ground. The covering layer 4 is formed on the slope G so as to cover the peripheral portions of the pressing members 10 and 10. The anchor member 1 is fixed by an anchor portion 2 such as mortar injection or the like, and the pressing member 10 is fixed to the ground while a tension is applied between the anchor member 1 and the fixing seat 3.
[0027]
The first embodiment of the pressing member 10 used at this time is shown in more detail in FIGS. The pressing member 10 is made of cast iron and is integrally formed by casting. The pressing member 10 has a substantially square bottom plate portion 11 that faces the slope G directly or via a base material, and the sole plate portion 11 alone has insufficient rigidity. Therefore, the reinforcing member 12 is reinforced in order to increase the strength at the time of applying the anchor tension, and the central reinforcing rib portion 12 located at the central portion for securing sufficient rigidity as the entire pressing member 10 and protrudes around the central portion. Peripheral reinforcing ribs 13 formed on the peripheral portion.
[0028]
The central reinforcing ribs 12 are formed in a rectangular shape and protrude in an annular shape toward the front (in a direction away from the slope), and the peripheral reinforcing ribs 13 configure the other three sides of the square having one side common to the central reinforcing ribs 12. . Therefore, the peripheral reinforcing ribs 13 on three adjacent sides and one side of the central reinforcing rib 12 form an endless annular wall.
[0029]
The central portion 11a of the bottom plate portion 11 on which the tension of the anchor directly acts is thicker than the peripheral portion. An anchor material through hole 19 through which the anchor material 1 is inserted is formed in the central portion 11a.
[0030]
On the other hand, a water transmission hole 15 is formed in a bottom plate portion surrounded by one side of the central reinforcing rib portion 12 and the peripheral reinforcing rib portion 13 and a peripheral bottom plate portion, and further, each central reinforcing rib portion 12 and each peripheral portion are formed. Water permeable holes 14 that penetrate and are connected to the lower surface of the pressing body 10 are formed in the lower part of the center of the reinforcing ribs 13. Further, at the four lower surfaces of the bottom plate portion 11 corresponding to the intersections of the central reinforcing rib portions 12, anti-slip portions 16, 16,... Are formed, and when the pressing body 10 is installed on the slope G, We are trying to prevent slippage.
[0031]
On the other hand, as shown in FIGS. 3 and 4, among the peripheral reinforcing ribs 13, parallel radial reinforcing ribs 13 a, 13 a extending radially from the intersection with the central reinforcing rib 12 are substantially formed. It extends toward the end while gradually reducing the overhang height.
[0032]
<Second embodiment>
The shape of the pressing member is not limited to the above-described square in plan view, but may be a circle, a triangle, a polygon having five or more corners, or the like. Accordingly, the arrangement of the central reinforcing rib portion 12 and the peripheral reinforcing rib portion 13 can be changed. As another example, a pressing member 20 according to the second embodiment shown in FIGS.
[0033]
The pressing member 20 used in the second embodiment is different from the pressing member 10 of the first embodiment in a cross shape, and has a bottom plate portion 21 in contact with the slope G, and a bottom plate portion 21. Are provided with an annular central reinforcing rib portion 22 for reinforcing the central portion of the base member, and peripheral reinforcing rib portions 23 including a radiation reinforcing rib portion 23a. The bottom plate 21 and the reinforcing ribs 22, 23 are integrally formed of cast iron.
[0034]
In this embodiment, the central portion 21a of the bottom plate portion 21 is devised so that the angle between the pressing member 20 and the anchor member 2 (the insertion angle of the anchor member 1) can be selected. That is, an annular protrusion 21b having an anchor material through-hole 29 and protruding forward is formed in the central portion 21a, and the upper end surface 21c of the protrusion 21b has a shape along the spherical surface. ing. By setting the fixing seat 3 of the anchor member 1 to a spherical surface on the side of the slope, the fixing seat 3 can be fixed at that position while selecting the insertion angle of the anchor member 1.
[0035]
Except for the central portion 21a of the bottom plate portion 21, a large number (a total of 20) of water permeable holes 25 are formed in each peripheral portion. Further, water permeation holes passing through the back surface at both sides (eight places) of the intersection of the four reinforcing ribs of the protruding part 21b and the central reinforcing rib part 22 and at each corner part (4 places × 4) of each peripheral reinforcing rib part 23. 24 are formed. Water permeation holes 26 are formed at the intermediate bottom of each of the peripheral reinforcing ribs 23 so as to pass therethrough.
[0036]
<Third embodiment>
8 to 10 show a pressing member 30 according to a third embodiment, in which a bottom plate portion 31 that contacts a sloped surface G having a rounded corner and a substantially square shape, and a center of the bottom plate portion 31. And a peripheral reinforcing rib portion 33 including a radial reinforcing rib portion 33a extending radially in a cross shape toward four corners of the bottom plate portion 31. The bottom plate 31 and the reinforcing ribs 32, 33... Are integrally formed of cast iron.
[0037]
The peripheral reinforcing ribs 33 form the other three sides of the square that share one side of the central reinforcing ribs 32. Therefore, the peripheral reinforcing ribs 33 on three adjacent sides and one side of the central reinforcing ribs 32 form an endless annular wall. Further, in this example, connecting ribs 34A connecting the radiation reinforcing ribs 33a, 33a to each other, and connecting ribs 34B connecting the central reinforcing rib 32 and the peripheral reinforcing rib 33 facing one side thereof are formed. I have.
[0038]
Also in this example, the parallel radial reinforcing ribs 33a, 33a extending in the radial direction from the intersection with the central reinforcing rib 32 extend substantially continuously toward the end while gradually reducing the overhang height. are doing. The same applies to the connecting rib 34B.
[0039]
Further, a portion around the corner of the central reinforcing rib portion 32, a portion where the central reinforcing rib portion 32 and the connecting rib 34B intersect, a portion where the connecting rib 34A and the radiation reinforcing rib portion 33a intersect, the connecting rib 34B and the peripheral portion around the end portion. 33, in the central reinforcing rib portion 32, in both sides of the connecting wall 31c between the projecting portion 31b forming the anchor material through hole 39 and the central reinforcing rib portion 32, and in the space surrounded by the ribs. A large number of water permeable holes 35 are formed in the bottom plate portion 31 on the back side. A water communication hole 36 is formed in the wall of the radiation reinforcing rib 33a.
[0040]
<Fourth embodiment>
FIGS. 11 and 12 show a pressing member 40 according to the fourth embodiment, in which a bottom plate portion 41 that contacts a sloped surface G having a rounded corner and a substantially square shape, and a center of the bottom plate portion 41. A circular annular central reinforcing rib portion 42 for reinforcing the portion, a radial reinforcing rib portion 43a as a peripheral reinforcing rib portion extending radially toward the center of the four corners and sides of the bottom plate portion 41, and an outer shape of the bottom plate portion 41 Are provided with intermediate reinforcing ribs 44 in an annular shape of a substantially square shape concentrically rounded. The bottom plate 41, the radiation reinforcing rib 43a, and the intermediate reinforcing rib 44 are integrally formed of cast iron.
[0041]
Also in this example, the radial reinforcing ribs 43a, 43a extending in the radial direction from the intersection with the central reinforcing rib 42 extend substantially continuously toward the end while gradually decreasing the overhang height. I have.
[0042]
Further, the intersection between the central reinforcing rib 42 and the radiation reinforcing rib 43a, the intersection between the peripheral annular reinforcing rib 44 and the radiation reinforcing rib 43a, both end portions of the radiation reinforcing rib 43a, and the central reinforcing rib 42. In addition to the concave portions between the connecting walls 41c between the protruding portions 41b forming the through holes 49 of the anchor material and the central reinforcing rib portions 42, the bottom plate portion 41 is formed inside and outside the space surrounded by the ribs. A large number of water permeable holes 45 are formed on the back side of the round and oval shape in plan view. A water communication hole 46 is formed in the wall of the radiation reinforcing rib 43a.
[0043]
<Other matters and form of construction>
The pressing member in the present invention is a member for pressing against the slope G and fixing it in a tensioned state by the anchor material. Therefore, a sufficient lower surface area is required for pressing. For this purpose, 50 cm square or more (0.25 m^TwoAbove). Therefore, it should be noted that the pressing member is different from the anchor tension member or the locking bolt fixing member having a small cross section which is used by being installed on the concrete block surface.
[0044]
The material of the pressing member is preferably made of metal, and particularly preferably made of cast iron because molding and formation of holes are easy. The type of cast iron is not limited at all. For example, gray cast iron (plain cast iron, high-grade cast iron), spheroidal graphite cast iron (ductile cast iron, nodular cast iron), black-core malleable cast iron (malleable cast, malleable), white-core malleable cast iron, pearlite malleable cast iron, low alloy Cast iron, acicular cast iron, nihard cast iron, high chromium cast iron, niresist cast iron, high silicon cast iron, aluminum cast iron, chilled cast iron and the like can be used. As the pressing member, any other suitable material can be used, and in addition to casting, a unit plate can be assembled into a predetermined shape by welding or bolts. Therefore, “integration” of the bottom plate portion and the rib portion in the present invention has a meaning including a more joined form such as welding.
[0045]
At the time of construction, if the first pressing member 10 shown in FIG. 1 is employed, as described below, the peripheral portions of the pressing members 10 are substantially covered by the pressing members 10. That is, while covering the bottom plate 1 at least between the peripheral reinforcing ribs (in the embodiment, four rectangular portions surrounded by one side of the central reinforcing rib 12 and the peripheral reinforcing ribs 13...) The coating layer 4 is formed. The entire pressing member 10 (that is, including the central portion) can be completely covered with the coating layer 4. However, it is desirable to expose the head of the anchor material 1 and the fixing seat 3 or the head (rust-proof) cap 5 also in order to confirm the position during maintenance.
[0046]
thisThe coating layer 4 is a greenable layerIs more preferable. Therefore, it is a water-permeable covering layer. Although not limited to the formation mode of the greening layer, the water permeability is 10^-Fivecm / sec or more soil layer, for example, a water permeability of 10^-Fivecm / sec or more. The soil layer may be sand, cement-mixed sand, or sand mixed with a polymer binder in addition to the soil (which may be locally generated soil). Sand and / or earth and sand 1m when soil cement layer is used^ThreeIt is desirable to set the ratio of cement per unit to 20 to 80 kg. In addition to the soil layer alone, it is desirable to form an organic growth base layer on the surface of the soil layer for plant growth. Examples of the material of the growth base layer include composts of felled trees and chips, organic soil conditioners, fertilizers, and the like. More specifically, peat moss as an organic soil improver, bark compost as a main raw material, and a mixture of a polymer-based and inorganic soil improver, fertilizer, binder, seeds, and the like can be given. .
[0047]
In addition, fibers can be mixed into the soil layer to form a fiber-mixed soil layer. The fibers mixed into the fiber-mixed soil layer may be short fibers or long fibers, but it is preferable to mix continuous long fibers. When the continuous fiber is mixed, for example, as shown in FIG. 13, as shown in FIG. It is recommended that the air be introduced, be passed through the fiber pressure feeding hose 107 by compressed air by the compressor 106, and be blown toward the slope G from the blowing nozzle 108 at the tip.
[0048]
It is preferable to use a bulky yarn as the continuous filament. Examples of the material include resins of various series such as polyester, polyamide, acrylic, polyvinyl alcohol, polypropylene, polyethylene, polyvinyl chloride, polyvinylidene chloride, and acetate. It is also effective to use a conjugate yarn, particularly a bonded yarn. When a bulky yarn of this type is used, the friction area between the fibers and the compressed air at the time of feeding the fibers is increased, the transportability is further improved, and the fibers are easily dispersed after spraying. The number of crimps of the bulky yarn is preferably 50 to 9000, particularly preferably 100 to 3,000 per 25 m in JIS L 1015. Also, rather than using a single fiber of total denier as a bulky processed yarn, it is more uniform to spray a bundle of about 2 to 40 fibers of 50 to 1000 d (denier) on the surface to be sprayed. And is excellent in stability of the fiber-incorporated soil layer.
[0049]
The form of the coating layer 4 is appropriate as long as it has a function of protecting the slope. The coating layer 4 is not limited to the entire target area on the slope, and may be partial.
[0050]
Further, as described above, the coating layer 4 can be formed with a plurality of layers as shown in FIG. In the embodiment, a guest soil layer 4A is formed on the slope G so as to substantially cover the pressing member 10, and an organic growth base layer 4B as a surface layer is formed on the guest soil layer 4A. It is. When the continuous long fibers 4f are mixed into the soil layer 4A, the shearing force of the soil layer 4A itself is increased, and the adhesive force (adhesive force) of the forming material of the soil layer 4A is increased, so that the rainfall and the wind may cause the material to flow away. Collapse can be prevented. Short fibers, long fibers, or continuous long fibers can be mixed into the growth base layer 4B.
[0051]
The coating layer 4, the soil layer 4A, and the growth base layer 4B may be formed by spraying, spraying, or the like, instead of spraying. The thickness of the coating layer 4 is desirably 10 cm or more in a mode of vegetation. Therefore, the thickness of the soil layer 4A is desirably 10 cm to 50 cm, preferably 20 cm to 30 cm, and the thickness of the growth base layer 4 B is desirably 1 cm to 7 cm.
[0052]
On the other hand, when the thickness of the covering layer 4 is smaller than the projecting height of the central reinforcing rib of the pressing member, the pressing Although the entire member is hidden by the covering layer 4, the central reinforcing rib portion is partially exposed to the outside, but does not significantly reduce the appearance. In this case, if necessary, only the pressing member and its vicinity can be made thicker than the surrounding slope to cover almost the entire pressing member.
[0053]
On the other hand, as shown in FIG. 15, each space opened by the reinforcing rib portion of the pressing member 10 and opened to the near side is filled with the soil layer 4A, and on the soil layer 4A and the slope G, For example, an organic growth base layer 4B as a surface layer having a thickness of, for example, 3 to 10 cm can be formed, and vegetation can be vegetated over the entire area.
[0054]
In the above embodiment, vegetation soil may be used instead of the soil layer 4A.
[0055]
The reinforcing rib portion of the pressing member is not limited to the above-described plate shape, and may be various overhanging projections or the like.
[0056]
When the pressing members are arranged adjacent to each other, they can be connected to each other by, for example, a reinforcing bar. When the pressing member is made of steel, this connection can be performed by welding or an appropriate metal fitting. It is desirable that this type of connecting material is also hidden by the covering layer 4. This embodiment is shown in FIG. That is, the pressing members 20, 20,... Are arranged adjacently in a lattice shape, for example (only a pair of adjacent arrangements are shown in the drawing), and the pressing members 20, 20 are made of steel having male threads formed at both ends. The connecting members 50 and nuts are connected to cover the entire pressing members 20, 20,... And the outside of the pressing members 20, 20,... To form a water-permeable covering layer.
[0057]
By connecting the pressing members 20, 20 by the connecting member 50, even if the fixing of one pressing member 20 to the ground becomes unstable for some reason, the other pressing members 20 are As long as fixing is achieved, there is no instability, and stable support of the ground can be achieved by the pressing member groups 20, 20... In addition, by performing the connection, when a certain anchor comes off, the falling of the pressing member 20 is prevented because the other pressing member 20 is fixed to the ground by the anchor.
[0058]
From the same viewpoint of preventing the pressing member from dropping and stably fixing, as shown in FIG. 17, for example, when the pressing member 10 according to the first embodiment is taken as an example, the pressing member 10 is formed on the bottom plate 11. The auxiliary fixing member 6 such as a lock bolt or an anchor pin can be driven into the ground at the required position or number of the water permeable holes 15.
[0059]
As can be seen from the above-described process, it is desirable that the pressing member be as low in overhang height as possible and hidden as much as possible by vegetation. However, in order to press and support against collapse of the ground, the pressing member needs to have rigidity enough to withstand anchor anchoring.
[0060]
For this purpose, an annular central reinforcing rib portion is formed at the center of the bottom plate portion, and a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center. The central reinforcing rib portion and the radiation reinforcing rib portion are formed integrally with the bottom plate portion, and the inside of the central reinforcing rib portion is preferably a fixing portion of a head of an anchor, and has a desirable structure as a pressing member. is there.
[0061]
The present inventors, regarding the structure, in order to reduce the overhang height of the reinforcing ribs so as to hide as much as possible by vegetation, and to reduce the weight from the viewpoint of loading on slopes and installation. As shown in the above embodiments, the intersection between the central reinforcing ribs 12, 22, 32, 42 and the radiation reinforcing ribs 13a, 23a, 33a, 43a has substantially the same overhang height H. The radiation reinforcing ribs 13a, 23a, 33a, 43a extend from the intersection in the radial direction substantially continuously and with a length Lf extending toward the end while gradually decreasing the overhang height. Was found to be desirable. If the overhang height is reduced substantially continuously in the radial direction, integration with the surrounding coating layer can be easily achieved.
[0062]
Furthermore, it has been found that the relationship between the overhang height H and the extension length Lf is desirably within the region Z in FIG. As shown in FIG. 18, the allowable supporting force of the ground of the pressing member is 250 KN / m.^TwoThe extension length Lf is sequentially changed in three stages for the level, and the areas where the required overhang height H is obtained are S1, S2 and S3 at that time, and 150 KN / m^TwoFor the level, the extension length Lf is sequentially changed in three stages, and the areas where the necessary overhang height H is obtained are S4, S5 and S6 at that time, and the integrated area of these areas is the area Z in FIG. is there.
[0063]
Here, in each of the embodiments, two radiation reinforcing ribs 13a, 23a, and 33a are formed in parallel with each other, but can be regarded as one radiation reinforcing rib in structural calculation. Therefore, the radiation reinforcing rib 43a can be handled in the same manner. The connecting ribs 34 and the intermediate reinforcing ribs 44 can be neglected in calculation from the viewpoint of the present invention.
[0064]
Of course, it is possible to use the one at a position outside the area Z, but the one at that position is an area that cannot simultaneously satisfy the condition of light weight and the condition that the overhang height of the reinforcing rib portion is low and hidden by vegetation as much as possible. It is.
[0065]
When the one in the area Z is used, only the peripheral reinforcing ribs are left, and only the peripheral reinforcing ribs, and the water-permeable covering layer is formed by covering and covering the slope outside the pressing member. In general, the entire pressing member is less noticeable due to the vegetation.
[0066]
By the way, in order for the roots of the plants to crawl on the ground, the opening areas of the water permeable holes 14, 15, 24, 25, 35, 45 formed in the bottom plate of each pressing member are 7 to 80 cm.^TwoIs preferred. If necessary, before or after the installation of the pressing member on the slope, if a drilling hole with a depth of about 20 to 50 cm is formed in the ground at the necessary water permeation hole, the root of the vegetation or plant Development can be promoted.
[0067]
【The invention's effect】
As described above, according to the present invention, it is possible to hide the pressing member that tends to give an artificial sensation, and furthermore, there is an advantage that the material for forming the coating layer does not flow or collapse.Pressing member installation area In this case, greening can be achieved, and the pressing member is inconspicuous or hidden by plants, so that the presence of the pressing member cannot be recognized.
[Brief description of the drawings]
FIG. 1 is a sectional view of a construction mode.
FIG. 2 is a plan view of a first pressing member.
FIG. 3 is an arrow view of a portion corresponding to line AA in FIG. 2;
FIG. 4 is an arrow view of a portion corresponding to line BB in FIG. 2;
FIG. 5 is a plan view of a second pressing member.
FIG. 6 is a front view of FIG. 5;
7 is an arrow view of a portion corresponding to the line AA in FIG. 5;
FIG. 8 is a plan view of a third pressing member.
FIG. 9 is a side view thereof.
FIG. 10 is an arrow view of a portion corresponding to line 10-10.
FIG. 11 is a plan view of a fourth pressing member.
FIG. 12 is a cross-sectional view taken along a center line.
FIG. 13 is an explanatory diagram of a method of forming a fiber mixing layer (coating layer).
FIG. 14 is a sectional view of another construction mode.
FIG. 15 is a sectional view of another construction mode.
FIG. 16 is a plan view showing the connection between the pressing members.
FIG. 17 is a sectional view of still another construction mode.
FIG. 18 is an explanatory diagram showing a preferable range of a relationship between an overhang height H and an extension length Lf for each allowable supporting force level of the ground of the pressing member.
FIG. 19 is an explanatory diagram showing a preferable range of a relationship between an overhang height H and an extension length Lf.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Anchor material, 2 ... Anchor part, 3 ... Anchoring seat, 4 ... Coating layer, 4A ... Growth base material layer, 4B ... Soil layer, 4f ... Continuous fiber, 10 ... Pressing member, 11 ... Bottom plate part 11a ... Bottom plate Central portion, 12: Central reinforcing rib portion, 13: Peripheral reinforcing rib portion, 13a: Radiation reinforcing rib portion, 14, 15, 24, 25, 26, 35, 36, 45: Water permeable hole, 16: Non-slip portion, 19 ... anchor material through hole, 20 ... pressing member, 21 ... bottom plate part 21a ... bottom plate central part, 22 ... central reinforcing rib part, 23 ... peripheral reinforcing rib part, 21b ... protruding part, 21c ... upper end face, 24, 25, 26, water permeation holes, 29, anchor material through holes, 30, pressing members, 40, pressing members, G, slopes.

Claims (9)

A method of stabilizing the ground by fixing the pressing member installed on the slope to the slope by penetrating the anchor material into the center and inserting it into the ground and fixing the head thereof,
The pressing member has a bottom plate portion facing the slope, and a central reinforcing rib portion at a central portion and a reinforcing rib portion at a peripheral portion thereof, which protrude toward the near side, respectively, and these are integrated. Formed
And it is a member that presses against the slope and is fixed in a tension state by the anchor material, and the tension of the anchor acts on the bottom plate portion,
A plurality of the pressing members are arranged at intervals and fixed to the slope, respectively, and the whole including the peripheral portion or the central portion, and the permeable fiber covering and covering the slope between the pressing members. A slope stabilization method characterized by forming a coating layer mixed with water and vegetation. The slope stabilization method according to claim 1, wherein the fiber is a continuous filament. The slope stabilization method according to claim 1, wherein the fibers are short fibers or long fibers. The slope stabilization method according to any one of claims 1 to 3, wherein the covering layer is formed by forming a permeable guest soil layer and a surface layer thereon. The slope stabilization method according to claim 4, wherein the guest soil layer is a soil cement having a water permeability of 10 ^-5 cm / sec or more, and the surface layer is an organic growth base layer. The slope stabilization method according to claim 4 or 5, wherein fibers are mixed in at least one of the soil layer and the surface layer. An annular central reinforcing rib portion at a central portion of the pressing member, and a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center are integrated with the bottom plate portion. The central reinforcing rib portion is a fixing portion of the head of the anchor,
7. The radiation reinforcing rib portion and the central reinforcing rib portion form a substantially endless annular wall, and a coating layer is formed in an upwardly open space surrounded by the annular wall. The slope stabilization method according to any one of the above. An annular central reinforcing rib portion at a central portion of the pressing member, and a radial reinforcing rib portion continuous from the central reinforcing rib portion along at least four radial directions substantially uniform around the center are integrated with the bottom plate portion. The central reinforcing rib portion is a fixing portion of the head of the anchor,
8. The method according to claim 1, wherein the radial reinforcing rib portion extends substantially continuously from the intersection with the central reinforcing rib portion in the radial direction toward the end while gradually reducing the overhang height. Or the slope stabilization method according to item 1. The pressing member installed on the slope is a structure fixed to the slope by inserting the anchor material in the center part and inserting it into the ground to fix the head,
The pressing member has a bottom plate portion facing the slope, and a central reinforcing rib portion at a central portion and a reinforcing rib portion at a peripheral portion thereof, which protrude toward the near side, respectively, and these are integrated. Formed
And it is a member that presses against the slope and is fixed in a tension state by the anchor material, and the tension of the anchor acts on the bottom plate portion,
A plurality of the pressing members are arranged at intervals and are respectively fixed to the slopes, and the entirety including the entire peripheral portion or the central portion, and the water-permeable fibers covering and covering the slopes between the pressing members. A slope stabilizing structure, wherein a mixed coating layer is formed and vegetation is achieved.

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