JP3662500B2 - Slope stabilization method and its reinforcement frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention reinforces and stabilizes the slope of the natural ground by fixedly connecting and supporting the reinforcing frame constructed in a substantially lattice shape on the slope of the natural ground and the like. The present invention relates to a slope stabilization method and its reinforcing frame.
[0002]
[Prior art]
As a so-called slope stabilization method that reinforces and stabilizes natural forms of slopes, slopes (slopes) formed by cuts or embankments, etc. By preliminarily cutting this estimated layer (presumed collapse layer), or by performing embankment after the cutting, etc., a suppressor that creates the slope (slope) to an appropriate gradient that does not easily cause collapse, Or, after cutting the speculative collapse layer, a deterrent that forcibly reinforces the slope by generally constructing a reinforcement frame called a legal frame etc. on the slope in a substantially lattice shape is generally used. Known to.
[0003]
[Problems to be solved by the invention]
However, both of the above-mentioned restraint works and restraint works for slopes such as natural ground suppress the slope collapse by cutting the slope, and thus the natural ground, to a so-called stable layer where slope failure does not occur. Therefore, since it is a deterrent construction method, a large-scale cutting operation on a slope such as a natural ground is required. And since it is not easy to dispose of the soil (cutting soil) generated by cutting the slope, and the cost for the cutting work and disposal tends to be large, this kind of known restraining work and restraining work However, it is inevitable that the workability is reduced and the construction cost is increased.
[0004]
Moreover, the well-known slope stabilization method makes the slope the slope after leveling by cutting, embankment, etc. as the construction object. And, by cutting the slopes of natural ground to the stable layer, plants such as trees that grow naturally on the slopes are inevitably cut and removed, so in the known slope stabilization method, While it is possible to suppress or deter the collapse of the forest, it cannot be denied that it is accompanied by the destruction of the natural environment such as natural ground and the natural landscape.
[0005]
In addition, in the deterrent work etc. which reinforce a slope with a reinforcement frame, the greening construction method which artificially plants an exotic species plant etc. in the exposed part of soil after the reinforcement is also known. However, since this kind of greening is only artificial, there is a possibility that the natural environment or the natural scenery will be uncomfortable when considered in the whole ground.
[0006]
By the way, a formwork composed of a combination of reinforcing bars, wire mesh, etc. is arranged in a plane substantially lattice form on the slope, and a mortar or concrete is sprayed on this formwork to construct a substantially lattice-like reinforcement frame fixedly. The so-called on-site spray slope work is widely known as one of deterrent works that reinforce the slope with a reinforcing frame.
[0007]
In general, the mortar or concrete spraying work in this field spray slope work is performed by an operator who carries the spraying machine. However, the work on the slope is difficult, and the work is carried out with the sprayer. Therefore, it is inevitable that the worker is forced to make a great effort, and the workability is also lowered at the same time.
[0008]
In addition, although the formwork is formed by deformable reinforcing bars and wire mesh, since these deformations are only capable of dealing with relatively gentle irregularities, a known reinforcement frame used for on-site spray slope work, etc. However, it is inevitable that the adaptability to small unevenness or sudden unevenness is inferior. That is, the construction object of a known reinforcing frame is easily limited to a sloped surface made of cut, embankment or the like, and its versatility is inevitable.
[0009]
The present invention is a slope stabilization method that can be constructed without involving cutting of a slope and cutting of a plant, etc., and the slope stabilization method can be appropriately performed, and is excellent in adaptability to a slope and versatility. The purpose is to provide the reinforcement frame.
[0010]
[Means for Solving the Problems]
In order to achieve this object, according to the slope stabilization method of the present invention, a substantially hollow structure having a flexible arrangement in which a plurality of spaced apart parallel flexible wires are covered with a flexible coating material. A mold frame is arranged in a plane substantially lattice shape on a slope such as a natural ground, and a grout material is filled in the mold frame, thereby constructing a substantially grid-like reinforcing frame on a slope such as a natural ground. And by a plurality of supports disposed at intersections of the vertical and horizontal directions of the reinforcing frame, including at least a main support that is cast on a natural ground under a casting length that exceeds the estimated collapse layer of the slope that has been estimated in advance, This slope stabilization method is carried out to connect and support this reinforcing frame fixedly to a natural ground or the like.
[0011]
Further, the reinforcing frame of the present invention is a mold frame that holds a plurality of flexible wires arranged in the vertical and horizontal directions on an inclined surface such as a natural ground, and a plurality of flexible wires so as to be spaced apart from each other. By filling the grout material into a freely-foldable substantially hollow formwork having at least a formed body and a flexible coating material that covers a plurality of spaced apart juxtaposed flexible wires. Has been built.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
In the slope stabilization method according to the present invention, as shown in FIGS. 1 and 2, the reinforcing frame 10 is constructed in a substantially lattice shape on the slope 14 of the natural ground 12, and is placed and built in the natural ground. The reinforcing frame is fixedly connected and supported by the support body 16 (16-1, 16-2) to reinforce and stabilize the slope.
[0014]
Then, as shown in FIG. 3, a flexible hollow material having a flexible arrangement in which a plurality of flexible wire materials 20 that are spaced apart and juxtaposed by a mold forming body 18 are covered with a flexible coating material 22. The reinforcing frame 10 according to the present invention is constructed by filling the mold 24 with the grout material 26.
[0015]
Hereinafter, the slope stabilization method according to the present invention using the reinforcing frame 10 will be schematically described along the steps. As can be seen from FIG. 1 and FIG. 2, here, the slope 14 of the natural form in which the plant such as the tree 28 naturally grows is exemplified as the construction target.
[0016]
In this slope stabilization method, first of all, the depth of a layer that is in danger of collapsing, such as a natural mountain 12, is estimated in advance, and the vertical and horizontal intersection positions of the reinforcing frame 10 in a substantially lattice shape are assumed on the slope 14. To do. Then, a support 16 (16-1, 16-2) for fixedly connecting and supporting the reinforcing frame 10 to the natural ground 12 at the assumed intersection position is previously placed on the natural ground. .
[0017]
Here, as can be seen from FIG. 1, in the present invention, among the supports 16 (16-1, 16-2), the support 16-1 is preliminarily estimated collapse layer (presumed collapse layer) 30. It is the main support that has been cast in the ground and other places with a casting length exceeding. As can be seen from FIG. 2 in addition to FIG. 1, the main support 16-1 has a vertical length and a horizontal intersection of the reinforcing frame 10, and whether or not there is a penetration length, that is, whether or not there is a penetration to the speculative collapse layer 30. The auxiliary support 16-2 is not disposed at an alternate position.
[0018]
As shown in FIG. 1, the main support 16-1 is formed by, for example, fixing and fixing a fixing length defined on the front end side of the tension member 32 to a natural ground 12 or the like with a grout 34. An anchor body such as a so-called ground anchor can be exemplified, but the anchor body itself is well known, and its configuration, construction method, and the like are not the gist of the present invention, so detailed description thereof will be omitted here. .
[0019]
Further, as the auxiliary support 16-2, a known rod-like support such as a so-called anchor pin or a lock bolt can be exemplified.
[0020]
In the procedure in this embodiment in which the vertical and horizontal intersections of the reinforcing frame 10 are preliminarily assumed and the support 16 (16-1, 16-2) is placed in advance at this assumed point, the intersection is located at the position of the support. The reinforcing frame 10 is arranged and constructed so as to be arranged. As can be seen from FIG. 3, in this slope stabilization method, first, a set of a plurality of flexible wires, for example, four flexible wires 20 separated and juxtaposed by the formwork forming body 18. As described above, the flexible wires are arranged so as to intersect with each other in the vertical direction and the horizontal direction of the slope 14.
[0021]
As the flexible wire 20, a flexible wire, for example, a PC steel wire can be used. Then, for example, a mold forming body 18 as a spiral reinforcing bar is arranged around the four PC steel strands (flexible wire) 20, and the PC steel strand is bound to the mold forming body. By connecting and holding together, the framework of the mold 24 having a substantially circular cross section in which the wires of the four PC steels are spaced apart is formed.
[0022]
Next, the PC steel strand 20 and the spiral rebar (former forming body) 18 are covered with a flexible covering material 22 to form a substantially hollow mold 24 having a substantially circular cross section. .
[0023]
As the flexible covering material 22, for example, a bellows-shaped resin tube that can be expanded and contracted can be used.
[0024]
Then, the mold 24 covered with the resin tube (flexible covering material) 22 is filled with a grout material 26, for example, cement milk, for example, by a pumping device or the like, and this is fixed in the mold. At the same time, the support 16 arranged at each intersection, that is, the main support 16-1 and the auxiliary support 16-2 is fixedly connected to the support 16 (not shown) such as an anchor head, for example. By connecting, the plane substantially lattice-like reinforcing frame 10 is fixedly formed and constructed on the slope 14 with respect to the natural ground 12 (see FIGS. 1 to 3).
[0025]
Although detailed description is omitted here, for example, a dedicated intersection mold is provided at the vertical and horizontal intersections of the reinforcing frame 10, and the mold 24 is formed continuously with the intersection mold. Is preferred.
[0026]
As described above, in the slope stabilization method of the present invention, a plurality of (four) PC steel strands 20 which are flexible flexible wires are connected to a flexible bellows-like resin tube 22. By covering with, a form frame 24 of a reinforcing frame that can be bent and arranged freely is formed. In other words, according to the formwork 24 of this reinforcing frame, under the free bending of the PC steel strand 20 and the resin pipe body 22, the unevenness of the slope 14, that is, the formwork along the uneven shape Since the placement, formation, and eventually the reinforcement frame 10 can be easily constructed, the formation and construction object of the reinforcement frame is not limited to the slope that is leveled almost flat. Even uneven slopes can be sufficiently formed and constructed (see FIG. 1).
[0027]
And, because the main support 16-1 of the support 16 (16-1, 16-2) is driven into the ground and the like 12 with a driving length exceeding the estimated collapse layer 30 estimated in advance, Holding of the reinforcing frame 10 against the collapse force (sliding force) of the slope 14 can be sufficiently ensured without cutting the estimated collapse layer.
[0028]
That is, as shown in FIG. 1 and FIG. 2, according to the present invention, the natural form slopes 12 of natural ground such as trees 28 are reinforced without cutting the estimated collapse layer 30. Therefore, it is possible to sufficiently secure the natural environment such as the natural mountain or the natural scenery.
[0029]
And unlike the known tree planting method that artificially plants exotic plants, etc., it is possible to leave plants such as naturally grown trees 28 without cutting them, so the entire natural environment of natural ground 12 And it does not give a sense of incongruity to the natural landscape.
[0030]
Furthermore, the reinforcing frame 10 is not limited to bending deformation in the direction along the unevenness (non-land) of the slope 14, but can be easily and freely bent in the plane direction. That is, as shown in FIG. 2, the reinforcement frame 10 avoids the trees 28 that naturally grow on the slope 14 or partially buried rocks 36, such as the a1 to a4 portions of the reinforcement frame 10, or other necessity. The meandering position can be easily set according to the position of the support 16 (16-1, 16-2) provided at an irregular position as in the b1 part. Therefore, it is possible to form and construct a plane substantially lattice-like reinforcing frame on the slope without cutting trees or removing rocks. Therefore, also from this point, the natural environment of the slope 14 or the natural landscape can be sufficiently secured.
[0031]
In addition, since the natural ground 12 is not cut significantly, a large cutting work on the slope 14 such as the natural ground is unnecessary, and furthermore, the disposal of the soil (cutting soil) generated by the cutting of the slope is unnecessary. Therefore, the improvement of the workability and the reduction of the construction cost can be surely made. As described above, since it is not necessary to cut down the tree 28 existing on the slope 14 and to remove the rock 36, the workability is also improved in this respect.
[0032]
In addition, according to the reinforcing frame 10, it is sufficient to fill the grout material 26 such as cement milk into the mold 24 covered with the resin pipe body 22 by a pumping device or the like. I can be sure. Further, since it is not necessary for the worker to move on the slope 14 with the device or the like, the workability and the safety of the work are surely improved without imposing an excessive burden on the worker. .
[0033]
Here, in the embodiment of the present invention, the PC steel strand 20 is embodied as a flexible wire of the reinforcing frame 10, but it is not limited to this because any wire material that can be bent is sufficient. For example, you may utilize a rope, a chain, etc. as a flexible wire. Further, the number of the flexible wires 20 is four and the cross-sectional shape formed thereby is embodied as a substantially circular shape. However, it is sufficient if the hollow mold 24 can be formed. The cross-sectional shape of the mold frame and thus the reinforcing frame 10 may be formed from a flexible wire to a quadrangle or other polygonal shape.
[0034]
Note that the number of the flexible wires 20 may be appropriately selected depending on the strength required for the reinforcing frame 10 and the like.
[0035]
In the embodiment of the present invention, the main support 16-1 and the auxiliary support 16-2 of the support are alternately arranged. However, it is sufficient to ensure that the main support 16-1 has sufficient support strength of the reinforcing frame 10 with respect to the slope 14, and thus the natural ground 12, etc., and is not limited to this, for example, every second, every third, etc. The main support may be arranged.
[0036]
Furthermore, in the present invention, the planar shape of the reinforcing frame 10 is a substantially lattice shape, but the shape here is only an approximate shape, and flexible wires (PCs) arranged in the vertical and horizontal directions are used. Since it is sufficient to have a planar shape mainly composed of a steel strand (20), it is assumed that even a slight modification of the planar shape is included in the substantially lattice shape here.
[0037]
In this embodiment, the bellows-shaped resin tube 22 is embodied as a flexible covering material for the reinforcing frame 10, but a flexible material that can be bent is sufficient. For example, a woven fabric made of nylon thread or the like that hardly has stretchability and leakage of the grout material 26 may be used as the flexible covering material.
[0038]
Here, in the embodiment of the present invention, the spiral rebar is embodied as the formwork forming body 18, but it is sufficient to be able to hold the separated and juxtaposed PC steel wires 20 at the separated position. For example, a combination of a plurality of ring bodies may be used as the formwork forming body.
[0039]
Further, in this embodiment, the formwork forming body (spiral rebar) 18 is arranged around the PC steel strand 20, but is not limited to this, for example, the inside of a plurality of PC steel strands You may arrange this formwork formation in a position.
[0040]
The above-described embodiments are for explaining the present invention, and do not limit the present invention. All modifications, alterations, and the like within the technical scope of the present invention are included in the present invention. It goes without saying that it is done.
[0041]
【The invention's effect】
As described above, a reinforcing frame composed of a flexible flexible wire rod and a flexible mold frame mainly composed of a flexible covering material is formed and constructed on a slope such as a natural ground. According to the slope stabilization method according to the invention, since natural slopes such as natural growth of plants such as trees can be reinforced without cutting the presumed collapse layer, Ensuring the environment or natural landscape is sufficient.
[0042]
And since it is possible to leave plants, such as a tree which grew naturally, on the slope, without cutting down, it does not give a sense of incongruity to the whole natural environment, such as a natural mountain, and a natural scenery.
[0043]
In addition, this reinforcement frame can easily arrange reinforcement frames avoiding trees that naturally grow on slopes or partially buried rocks, etc. From this point also, the natural environment or natural landscape Is sufficient.
[0044]
In addition, since large ground is not cut, large-scale cutting work on slopes such as ground is unnecessary, and furthermore, disposal of soil (cutting soil) generated by cutting this slope is unnecessary. Improvement of the workability and reduction of the construction cost can be surely achieved.
[0045]
And according to this reinforcement frame, since it is sufficient to fill the grout material into the flexible mold frame covered with the flexible covering material, the work can be facilitated. In addition, since it is not necessary for the worker to move on the slope while carrying the apparatus or the like, the workability and the safety of the work are reliably improved without imposing an excessive burden on the worker.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of a slope showing a slope stabilization method according to the present invention.
FIG. 2 is a schematic plan view of a slope showing the slope stabilization method of the present invention.
FIG. 3 is a schematic perspective view of a reinforcing frame according to the present invention.
[Explanation of symbols]
10 Reinforcement frame
14 slope
16 (16-1,16-2) support (main support, auxiliary support)
18 Formwork
20 Flexible wire (PC steel strand)
22 Flexible coating (resin tube)
24 formwork
26 Grout
30 speculative collapse layer

Claims (2)

A plane substantially lattice-shaped reinforcement frame is constructed on the slope of a natural ground, etc., and this reinforcement frame is fixedly connected to and supported by the natural ground etc. by a predetermined support body that is placed and constructed on the natural ground. In slope stabilization method,
A substantially hollow formwork that can be bent and formed by covering a plurality of spaced apart parallel flexible wires with a flexible covering material is arranged in a substantially grid pattern on a slope such as a natural ground. By filling the mold with grout material, a substantially lattice-shaped reinforcing frame is constructed on a slope such as a natural ground,
This reinforcement is provided by a plurality of supports arranged at the intersections of the longitudinal and lateral directions of the reinforcement frame, including at least a main support that is cast on a natural ground under a cast length that exceeds the estimated collapse layer of the slope that has been estimated in advance. A slope stabilization method characterized in that the frame is fixedly connected to and supported by natural ground. A plurality of flexible wires arranged vertically and horizontally on a slope such as a natural mountain;
A mold forming body that holds a plurality of flexible wires and thereby arranges them in parallel;
A flexible coating covering a plurality of spaced apart juxtaposed flexible wires;
A reinforcing frame formed by filling a grout material in a substantially hollow mold having a bent arrangement and having at least a bent shape.

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