JP2017115303A - Greening method of banking slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To green a banking with a simple construction.SOLUTION: An additional soil 2 is laminated on the surface of a surplus soil 1 in a banking state, and a pile 12 with an outer boundary where a blade is installed spirally is rotated and pressed by a rotary driving device 31. Next, a pipe 21 with a number of water-permeable holes formed on the peripheral surface is connected and fixed to the rear end of the pile 12, and the pipe 21 follows the pile 12 and is rotated and pressed. Regarding a driving angle when the pile 12 and the pipe 21 are rotated and pressed, the pile and the pipe are driven into a slope 2a toward a slanting upper part so that an elevation angle is larger than 0 degree and 10 degrees or less. When the pile 12 and the pipe 21 are driven to a predetermined depth and are advanced, the pile and the pipe are left in the soil. After this, trees are planted in the additional soil 2.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method for greening an embankment slope.

  For example, earth and sand (residual soil) generated at a construction site or factory site may be temporarily placed in the state of being embanked in the vicinity of the site or site.

  However, it is not preferable in view of the landscape, environment, and safety that the remaining soil is temporarily placed in the state of embankment. Depending on the region, the so-called “greening ordinance” states the promotion and obligations of greening, and even if it is a private establishment, a specific greening rate is specified.

  In this regard, although it is not a method for greening such residual soil in the embankment state, as a method for greening the hard slope, a large number of through holes are provided in a hard slope such as a hard rock slope, and a predetermined hole of the through hole is provided. A vegetation cylinder composed of an organic vegetation layer, a fiber bundle body portion, and a void portion is inserted into a through-hole other than the predetermined hole, and several other than the predetermined hole are inserted. A vegetation pocket is formed with a through-hole as one block, and a vegetation base material such as a guest soil is inserted into the pocket for vegetation, and an anchor with blades is placed on a hard slope other than the pocket. On the other hand, it is proposed to form a sand base layer by spraying base sand, and to form an organic vegetation layer and a deep bed layer for vegetation above the sand base layer, and to vegetate and green the entire hard slope. (Patent Document 1).

Japanese Patent No. 2939850

However, such prior art does not first green the embankment directly, and the target slope is a hard slope such as a concrete spray face, a mortar spray face, a retaining wall face, or a hard rock slope face. Therefore, no matter how it is compacted, these hard slopes and embankments have a large difference in hardness and cannot be applied as they are. In addition, in the prior art, first, a large number of through holes are provided, then anchors with blades are placed in the through holes, and a dedicated vegetation cylinder is prepared and inserted to form a vegetation pocket. A vegetation base material such as soil is inserted and then vegetated, and then a sand base layer is formed by spraying the base sand on the part where anchors other than the pockets are placed, and organic vegetation is formed above the sand base layer. It requires a lot of labor and labor, as well as a lot of necessary equipment.
Such a construction method is an excessive construction method for greening the embankment and is not realistic.

  This invention is made | formed in view of this point, and aims at solving the said problem by providing the simple and appropriate construction method suitable for greening a banking.

  In order to achieve the above object, the present invention is a method for greening an embankment slope, in which customer soil is laminated on at least the slope surface of the embankment, and then a reinforcing material having an anchor function is larger than 0 degree and 10 degrees. At the following elevation angle, it is made to enter from the slope side of the customer soil, and subsequently to the reinforcing material, a pipe that is connected to the reinforcing material and has a water-permeable hole formed on the peripheral surface is entered, and at least the reinforcing material reaches the embankment. The pipe entry operation is performed until the entry operation is performed at a plurality of locations on the slope of the customer soil, and then at least one of tree planting or seedling planting is performed on the customer soil.

According to the present invention, the customer soil is laminated on at least the slope surface of the embankment, and then a reinforcing material having an anchor function is entered from the slope side of the customer soil at an elevation angle greater than 0 degree and 10 degrees or less, Subsequent to the reinforcing material, one or more pipes having a perforated hole formed on the peripheral surface are entered, and the pipe is infiltrated at least until the reinforcing material reaches the embankment. After performing at a plurality of places on the slope, at least one of planting or seedling planting is performed on the soil, so that the soil suitable for growing the plant includes a reinforcing material having an anchor function, and The pipe prevents it from slipping off the embankment. Moreover, even if rainwater enters the soil, the pipe with the perforated holes is driven at an elevation angle greater than 0 degrees and 10 degrees or less, that is, tilted downward at an angle of 10 degrees or less when viewed from the soil side. Since it is arranged, the rainwater that has penetrated into the soil is quickly drained to the outside through the pipe, so that the soil is prevented from sliding off from the embankment.
In the present invention, it is necessary that the reinforcing material entering the embankment has drawing resistance, and for example, it is preferable that all of the reinforcing material enter the embankment after construction.

  And the construction itself was also layered at least on the slope surface of the embankment, and then a reinforcing material having an anchor function was entered from the slope side of the soil, and a water-permeable hole was formed on the peripheral surface following the reinforcing material. Since only the pipe is allowed to enter, the labor and labor are reduced compared to the conventional one, and less equipment and equipment are required than before, and if the small-diameter pile is used, the equipment itself can be small.

  It is preferable that the mound slope of the slopes of the embankment and the customer soil is 1: 0.6 to 1: 2.0. Here, the mound slope refers to the height (a) of the slope: horizontal length (b), as will be described in the following embodiments.

  It is preferable that the penetration length of the pipe is longer than the thickness of the customer soil.

  And it is preferable that the thickness which laminates the said customer soil on the said embankment is 0.2-1.4m.

The approach length of the reinforcing material into the embankment is preferably a length that can sufficiently exhibit an anchor function necessary for reinforcement.
Here, the length that can sufficiently exert the anchor function necessary for reinforcement is, for example, the length that the adhesion between the reinforcement and the ground is greater than the tensile force, or if the reinforcement is regarded as a pile, it is more than the tensile force. Also refers to the length that the pull-out resistance of the pile becomes larger.

  According to the present invention, the labor and labor of construction are reduced compared to the conventional one, and the necessary equipment and equipment can be smaller than the conventional one.

It is side surface sectional drawing of the remaining soil of a banking state. It is side surface sectional drawing which shows the state which laminated | stacked customer soil on the surface of the remaining soil of a banking state. It is a side view of a pile used in an embodiment. It is a side view of the pipe used in the embodiment. It is side surface sectional drawing which shows the state which started driving | driving a pile. It is explanatory drawing of the front side by the side of the slope of customer soil which shows the pitch of a driving | running | working part. It is side surface sectional drawing which shows the state which connected the pipe to the rear-end part of the pile and started to drive. It is side surface sectional drawing which shows the state which driven the pile and the pipe for predetermined length, and left these. It is side surface sectional drawing which shows a mode that it planted in the customer soil.

Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a remaining soil 1 in a banking state, and this remaining soil 1 is compacted in advance by a known compacting device such as a roller type or a plate type. It is compacted so that the cone index is, for example, 1200 kN / m ² or more. And the mound inclination (gradient) of the slope 1a is embanked so that it may become 1.2-1.4. Here, the mound slope (gradient) means a value represented by horizontal length (b) / height (a) of the slope 1a shown in FIG.

The customer soil 2 is laminated on the surface of the remaining soil 1. The customer soil 2 is stacked in parallel to the surface of the remaining soil 1, and the slope 2a of the customer soil is also formed on the slope 1a of the remaining soil. After the customer soil 2 is stacked on the remaining soil 1, the customer soil 2 is also compacted by the compaction device. In this case, the cone index soil dressing ^{2, 267kN / m 2 ~1510kN / m} 2, preferably from about 300 kN / ^{m 2.} In addition, the kind of soil used for the customer soil 2 is a soil suitable for growing plants.

  The thickness of the soil soil 2 laminated on the remaining soil 1 is such that the thickness d after compaction is 0.2 m to 1.4 m on the slope 2 a of the soil soil 2 so as to have the cone index as described above. The customer soil 2 is stacked on the remaining soil 1 so that This thickness d is appropriately selected depending on, for example, the type of tree or grass to be planted. The customer soil 2 thickness d is a thickness perpendicular to the surface of the customer soil 2, as shown in FIG.

  Next, the reinforcing material, the approach to the slope of the pipe, and the driving work are performed. The reinforcing material and the pipe used in the present embodiment are as follows.

  First, as a reinforcing material having an anchor function, as shown in FIG. 3, a pile 12 in which blades 11 are spirally formed on the outer periphery of the main body 10 is used. The pile 12 has a so-called auger screw structure in which blades 11 are formed on the outer periphery of a cylindrical main body 10. As for the size of the pile 12 used in the embodiment, for example, the diameter viewed from the axial direction of the blade is 140 to 200 mm, the diameter of the main body 10 is 40 to 90 mm, and the length is 2000 to 3000 mm. Of course, it is not limited to such a size, and can be appropriately selected depending on conditions and the like.

  As shown in FIG. 4, the pipe to be continuously entered into the pile 12 is a cylindrical pipe 21 as a whole, and a large number of water-permeable holes 22 penetrating in the thickness direction of the pipe 21 are formed on the peripheral surface thereof. . In the present embodiment, the water permeable hole 22 has a long hole shape along the axial direction. Of course, the shape of the water-permeable hole 22 is not limited to such a long hole shape. Moreover, in this Embodiment, the aperture ratio with respect to the area of the surrounding surface of the pipe 21 of the water-permeable hole 22 is 5%. The opening ratio can be appropriately selected depending on the conditions of the remaining soil 1 and the customer soil 2.

  The pipe 21 has a diameter of 40 to 90 mm and a length of 2000 to 3000 mm. Of course, it is not limited to such a size, and can be appropriately selected depending on conditions and the like.

  On the inner periphery in the vicinity of the rear end portion 23 of the pipe 21, a locking convex portion 24 that protrudes toward the center is provided. This convex part 24 is for latching with the drive part of rotational drive apparatuses 31, such as the below-mentioned motor, and obtaining a rotational force.

  Then, the pile 12 and the pipe 21 are driven from the slope 2a of the soil 2 into the soil 2 and the remaining soil 1, and first, the pile 12 is driven as shown in FIG. To enter. When driving and making it approach, first, the rear-end part 13 of the pile 12 is set to rotation drive apparatuses 31, such as a motor. And, for example, a gantry having rails or the like is installed outside the slope, the rotary drive device 31 is set on the gantry, and the rotary drive device 31 is operated while the pile 12 is placed on the slope 2a side together with the rotary drive device 31. I will press fit. As a result, the pile 12 is rotationally pressed into the soil 2 from the slope 2a and into the remaining soil 1 from the slope 1a. Note that this placing method is merely an example, and various other known methods can be employed.

  At this time, the driving approach of the pile 12 is driving in the elevation direction, that is, obliquely upward, but as shown in FIG. 5, the driving angle θ is 0 <θ ≦. 10 degrees is preferred.

  In this way, the pile 12 is driven from the inclined surface 2a, and when the pile 12 is driven to a considerable extent, the drive portion of the rotary drive device 31 is once in a state where the rear end portion 13 of the pile 12 has not yet entered the ground. The fixation with the rear end portion 13 of the pile 12 is released, and the leading end portion of the pipe 21 is connected and fixed to the rear end portion 13 of the pile 12. Connection fixing can be selected as appropriate, such as welding or fixing by a fixing member.

  When the connection and fixing of the pile 12 and the pipe 21 are completed, the rear end portion 23 of the pipe 21 and the drive unit of the rotary drive device 31 are fixed, and then the pipe 21 is rotationally press-fitted to enter the ground.

  In this way, the pipes 21 are sequentially added and entered into the ground, and when the total length of the piles 12 and the pipes 21 that have entered the ground reaches a predetermined length, these driving operations are terminated.

  In this case, at least the pile 12 reaches the remaining soil 1, and the rear end portion 23 of the pipe 21 protrudes slightly from the slope 2a as shown in FIG. As shown in FIG. 7, for example, when the pile 12 that has entered the outer periphery of the pile 12 is a pile provided with spiral blades on the outer periphery, all the outer peripheral blades enter the embankment and secure pull-out resistance in the embankment. Good condition. Such a length is determined in consideration of the strength of the remaining soil 1.

  And the pile 12 and the pipe 21 are driven into a staggered arrangement as seen from the slope 2a side, as shown in FIG. At this time, as shown in FIG. 6, the horizontal pitch m of each pile 12, the entry of the pipe 21, and the driven-in portion P is set to 2 to 3 m. Moreover, the space | interval n of the up-and-down stage when driving in zigzag arrangement is set to 2-3 m.

  If the pile 12 and the pipe 21 are made to enter the predetermined length and are left in the remaining soil 1 and the customer soil 2 as described above, if a plant or a seedling such as a desired tree 51 is planted in the customer soil 2 as shown in FIG. Good.

  As described above, according to the present embodiment, first, when viewed from the whole construction, the customer soil 2 is laminated on the remaining soil 1, and then the piles 12 and the pipes 21 are driven in and then the piles 12, Since the pipe 21 can be left in the remaining soil 1 and the customer soil 2 as it is and then a desired tree 51 or the like can be planted in the customer soil 2, the construction as a whole is very simple.

  Moreover, since the pile 12 and the pipe 21 have a relatively small diameter (diameter of 90 mm or less), a simple and small rotary drive device 31 is sufficient for driving them into the ground. Compared to the construction method, much labor and labor are reduced.

  By the way, the remaining soil 1 and the customer soil 2 have greatly different cone indexes, and it is considered that the customer soil 2 slips and collapses due to infiltration of rainwater or the like, but according to the present embodiment, The pile 12 left after driving is provided with a blade 11 spirally on the outer periphery thereof, and these have an anchor function. The pipes 21 are connected and fixed to the piles 12 and are driven into the ground considerably longer than the thickness of the soil 2, and the pipes 21 are formed with a large number of water-permeable holes 22. Since it is driven at an elevation angle, it is left in the ground in the direction of descending to the slopes 1a, 2a side. Therefore, the rainwater that has penetrated into the customer soil 2 is quickly discharged from the permeation hole 22 of the pipe 21 to the outside of the slope 2a. For these reasons, even if rainwater penetrates into the soil 2, the soil 2 is prevented from slipping down from the remaining soil 1 and collapsing the slope.

  In the above-described embodiment, the pile 12 having an anchor function used as a reinforcing material was an auger screw shape in which the blades 11 were spirally provided on the outer periphery of the main body 10, but not limited thereto. The reinforcing material having an anchor function used in the present invention may be any material that can be easily propelled into the ground and has an anchor function by being locked with the ground when left in the ground. .

  Moreover, in the said embodiment, although it constructed for what the remaining soil 1 was embanked, this invention is naturally applicable not only to such remaining soil but to the embankment of general earth and sand, for example.

  INDUSTRIAL APPLICABILITY The present invention is useful when greening the slope of the remaining soil in the filled state.

DESCRIPTION OF SYMBOLS 1 Residual soil 1a Slope 2 Guest soil 2a Slope 10 Main body 11 Blade 12 Pile 13 Rear end part 21 Pipe 22 Water-permeable hole 23 Rear end part 24 Convex part 31 Rotation drive device d Thickness m Pitch n Upper and lower step spacing P

Claims (5)

A method for greening the embankment slope,
Lay the soil on at least the surface of the slope of the embankment,
Then, the reinforcing material having an anchor function is entered from the slope side of the guest soil at an elevation angle of greater than 0 degree and 10 degrees or less,
Following the reinforcing material, the pipe connected with the reinforcing material and having a water-permeable hole formed on the peripheral surface is allowed to enter, and at least the reinforcing material enters the embankment, and the pipe enters the work.
A method for greening an embankment slope, comprising performing at least one of planting or seedling planting on the soil after performing the approach operation at a plurality of locations on the slope of the soil. The method for greening an embankment slope according to claim 1, wherein a mound slope of the embankment and the slope of the customer soil is 0.6 to 2.0. The method for greening an embankment slope according to any one of claims 1 and 2, wherein an entry length of the pipe is longer than a thickness of the guest soil. The method for greening an embankment slope according to any one of claims 1 to 3, wherein the thickness of the customer soil laminated on the embankment is 0.2 to 1.4 m. The length of approach to the embankment of the reinforcing material is a length that can sufficiently exhibit an anchor function necessary for reinforcement, The embankment slope according to any one of claims 1 to 4, Greening method.

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