JP2020100988A - Construction method of water-permeable wall for reinforcing sloped face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing a water permeable wall for slope reinforcement, which can easily and inexpensively perform slope reinforcement construction. SOLUTION: A wall front side formwork panel 2a is installed at a position away from the lower end of a ground 1 to be reinforced so that its mold surface is substantially vertical, and a wall front side formwork panel 2a and a wife side mold are installed. The filling space S formed by the frame panel 2b and the ground 1 is filled with ready-mixed concrete, and the ready-mixed concrete is hardened in the filling space S to form a porous concrete wall portion W1 (a water-permeable wall W). W2, W3) were formed. [Selection diagram] Fig. 2

Description

The present invention relates to a method of constructing a permeable wall for slope reinforcement.

A method of constructing a retaining wall using ordinary concrete (RC), a method of using sandbags, a method of using a futon basket, in order to prevent restoration of a slope failure, slope failure, sediment outflow, etc. Block products are commonly used.
As shown in FIG. 9, for example, a retaining wall 300 made of normal concrete (RC) is used when almost permanent repair is performed, and is generally constructed as follows.
(1) Excavate the collapsed part of the slope as needed to expose the ground 100 and level the floor, and then place the base 200.
(2) A rock mass side formwork (not shown) is installed on the rock mass 100 side.
(3) Arrange a drain pipe (not shown).
(4) A front side formwork (not shown) is installed in the state where a separator (not shown) is provided between the formwork side formwork and a retaining wall forming space, and it is necessary between both formworks. Reinforcing bars (not shown) are arranged accordingly.
(5) Concrete is poured into the retaining wall forming space and cured to construct the retaining wall 300 with the drain holes 310.
(6) After removing both molds, a backfilling material 400 such as crushed stone or crushed stone is formed with a backfilling material filling space of a predetermined width between the retaining wall 300 and the ground side, though not shown. A backfill material support panel is erected so as to form a backfill material filling space in the backfill material, and the backfill material support panel is not collapsed while filling the backfill material filling space with the backfill material 400. A part of the backfill soil 500 is filled between the support panel and the ground 100.
Then, while gradually pulling up the backfill material support panel, the backfill material 400 and the backfill soil 500 are gradually piled up upward so that the drainage hole 310 is not blocked, and the back wall material 300 on the natural ground 100 side is retained. Backfilling the backfilling material 400 such as crushed stone or crushed stone along the wall surface and backfilling (7) Construct the top end concrete 410 of the backfilling portion.

However, the retaining wall 300 as described above has many construction procedures and has many restrictions including the concrete thickness.
In addition, concrete is generally constructed with the intention of stabilizing the strength and weight of the structure, but even if the concrete part has strength, there is no strength on the side of the natural ground 100 (unbalance), and cracks and gaps are compared. There is a problem that it easily occurs.
Further, due to the outflow of earth and sand from the drainage hole 310, a space is created on the ground side, and conversely, due to poor drainage, rainwater, spring water, etc. accumulate between the ground 100 and the retaining wall 300, and the retaining wall can collapse. Sex also occurs.

On the other hand, the above-mentioned construction method using sandbags, construction method using a futon basket, and block product have the following problems, respectively.
In other words, the construction method using sandbags has the advantage that it can be installed in a short period of time, but it is only a temporary measure, and the filler inside the sandbags weakens when it contains water, and there is a possibility of re-collapse. However, in the long term, there are problems such as deterioration of the bag body and inferior aesthetics.

The method using a futon basket is a method of putting cobblestone in a basket made of steel wire and arranging it at the earth retaining position.It is mainly used for the purpose of landscape conservation, environmental consideration, drainage of spring water, reduction of river flow velocity, etc. However, in addition to the labor required for construction, there are problems that it is difficult to arrange neatly, and it may be difficult to obtain the stones.
Although the block product can be excellent in strength, it is often impossible to construct immediately because the desired site conditions are not satisfied.

In addition, a method for constructing a porous concrete retaining wall using a special slope bucket attached to a hydraulic excavator (see Patent Document 1) has already been proposed.

That is, according to this construction method, since a porous concrete layer having water permeability is provided along the slope, the drainage hole is not necessary, and the outflow of sediment from the drainage hole is eliminated, so that the porous concrete layer is formed. There is little possibility that a cavity will be formed between the layer and the ground.
In addition, rainwater and spring water enter the porous concrete layer and can be drained through the drainage path through a small gap in the porous concrete layer, so that water does not accumulate between the porous concrete layer and the ground.

Japanese Patent No. 4644646

However, in the above construction method, the raw porous concrete for forming the porous concrete layer can be held along a part of the slope, and a special slope bucket having a structure capable of spraying a quick-setting agent onto the held raw porous concrete. Need to be prepared and costly.
In addition, it is possible to form only a narrow porous concrete layer of the slope bucket width at one time, that is, a porous concrete layer of a small area, and even if a quick-setting agent is used, it takes time and the arm length of the hydraulic excavator is increased. There is a problem that construction can only be done.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for constructing a slope-permeable water-permeable wall that enables easy and inexpensive reinforcement of slopes.

In order to achieve the above object, a method for constructing a permeable wall for slope reinforcement according to the present invention (hereinafter, referred to as "construction method of the present invention") is a front wall surface at a position away from the lower end of the slope to be reinforced. The side form panel is installed so that the mold surface rises at an angle equal to or greater than the inclination angle of the slope, and the raw porous concrete is placed in the filling space formed between the wall front side form panel and the slope. The method is characterized by including a porous concrete wall portion forming step of filling and hardening the raw porous concrete in the filling space to form the porous concrete wall portion.

The construction method of the present invention is not particularly limited, but the porous concrete wall portion forming step may be repeated toward the upper side of the slope to form a plurality of steps of the porous concrete wall portion in a stepwise manner.
By the way, according to the knowledge of the inventor, if the height of the permeable wall to be obtained is 3 m or less, the porous concrete wall portion forming step only needs to be performed once, but if it is higher than that. It is preferable to divide the porous concrete wall portion forming process into a plurality of times.
Of course, even if it is less than 3 m, it may be divided into a plurality of times.

In the construction method of the present invention, it is preferable that the mold surface of the mold frame panel is substantially perpendicular to the horizontal plane.
That is, by making it substantially vertical, the area of the flat surface of the top of the porous concrete wall can be increased, and effective use such as placing a planter on the top can be achieved.

In the construction method of the present invention, a water-permeable road surface that communicates with the lower end of the slope-reinforcing water-permeable wall and that is connected to the drainage path may be provided along the position where the slope-reinforcing water-permeable wall is provided.
That is, rainwater or spring water that has penetrated into the permeable wall for slope reinforcement is smoothly discharged to the drainage path.
The water permeable road surface can be provided at any timing before and after construction of the slope reinforcement water permeable wall.

The construction method of the present invention, before filling the raw porous concrete, one end of the positioning linear material of the form panel to the fixed portion provided between the wall front side form panel and the slope The step of fixing may be included.
That is, the linear material can reliably prevent the wall-front-side formwork panel from being warped or tilted under the load of fresh porous concrete.
If the porous concrete wall is 3 m or less and only one step of the porous concrete wall portion needs to be provided, the above positioning linear member may be omitted.

Further, after the raw porous concrete is hardened, the positioning linear material remains in the permeable wall in an expanded state, so that the permeable wall can be strengthened.
In addition, the above-mentioned filament material means a wire, a reinforcing bar, a cord, etc., and the material and thickness are appropriately determined as necessary, but the material is an alkaline component of cement material, rainwater, spring water, etc. It is preferable to select one having excellent corrosion resistance against the alkaline component or acidic component contained in.

Further, in the construction method of the present invention, in order to increase the strength of the water permeable wall, horizontal streaks or the like may be provided so as to intersect with the positioning linear members.

In the construction method of the present invention, the raw porous concrete may be filled in the filling space in a state in which a drainage performance enhancing material forming a drainage promoting portion is arranged along the slope side of the filling space. ..
That is, if the drainage performance enhancing material is embedded in the porous concrete wall as described above to form the drainage promoting portion, the rainwater or spring water that has penetrated into the porous concrete wall is caused to flow out to the surface side of the porous concrete wall. Without this, the water can be drained more smoothly to the drainage route via the drainage promotion section with high drainage performance.
Even if a large amount of rainwater or spring water mixed with earth and sand flows into the porous concrete wall from the slope side, it does not flow out to the surface side of the porous concrete wall, so the surface of the porous concrete wall can be kept clean for a long time. it can.
In addition, as the drainage performance enhancing material, as a single body, or stacked in a plurality, or embedded in the porous concrete wall in a state of laying a plurality, etc., without impairing the strength of the porous concrete wall, the porous The inside of the concrete wall is not particularly limited as long as it can form a drainage promoting portion having a drainage performance larger than that of porous concrete along the slope, and examples thereof include a perforated pipe, a crushed stone, a crushed stone, and a large crushed stone. Although these may be used in combination, it is preferable to use a perforated pipe in consideration of workability.
The perforated tube is not particularly limited, but it is preferable to arrange a plurality of mesh-like tubes along the slope.

In the construction method of the present invention, a sediment receiving groove, which is recessed from the other top surface, may be provided along the slope at the end on the slope side of the top of the porous concrete wall.
That is, when installing up to the middle of the slope to reinforce the permeable wall, when rainwater or spring mixed with earth and sand flows down along the slope above the permeable wall, rainwater or spring mixed with earth and sand First, it flows into the earth receiving groove. Then, the water permeates into the permeable wall from the bottom and side wall surface of the sediment receiving groove and is drained, but the sediment remains in the sediment receiving groove.
Therefore, it is possible to prevent the sand and sand from flowing into the wall surface from the top end of the water permeable wall and keep the wall surface of the water permeable wall clean.
It should be noted that the sediment collected in the sediment receiving groove may be regularly removed.

The construction method of the present invention arranges a decorative layer forming form panel so as to form a decorative layer forming material filling space between the rising surface of the polar concrete wall portion, and in the decorative layer forming material space, A resin binder and a decorative layer forming material containing natural stone may be poured and the resin binder may be cured to form a water permeable decorative layer.
Further, the decorative layer forming material may be spread evenly on the top end to provide the decorative layer.

The water-permeable decorative layer improves the design of the water-permeable porous concrete wall portion and can protect the water-permeable porous concrete wall portion.
The resin binder is not particularly limited, but examples thereof include a one-component urethane resin and a two-component epoxy resin.

In the present invention, the pouring of the raw porous concrete may be performed by injecting it into the filling space using a hopper (also referred to as a raw concrete bucket or a baccan), so that the transportation cost can be reduced and the stockyard can be small. become.

In the present invention, the raw porous concrete, the strength of the wall required at the construction site, depending on various conditions such as porosity, the type of aggregate, the particle size, the amount of water, the amount of cement, etc. are appropriately determined. It is preferable to use a formulation that can be supplied from the plant and has high workability.

As the aggregate, crushed stone is generally used, but since it can contribute to environmental protection, instead of crushed stone or mixed with crushed stone, crushed recycled material such as waste plastic, waste brick, waste roof tile, etc. Alternatively, wood chips, bamboo chips, crushed roots, etc. can be used as required.
When crushed stone is used as the aggregate as described above, it is not particularly limited, but it is No. 5 crushed stone (13 to 20 mm), No. 6 crushed stone (5 to 13 mm), No. 7 crushed stone (2.5 to 5 mm) and these. Mixtures are preferred.

The porosity of the porous concrete wall is not particularly limited, but is preferably 15% to 35%, more preferably 20 to 30%.
That is, if the porosity is too low, water permeability may be insufficient, and if the porosity is too high, strength may be insufficient.

In the present invention, the porosity is proposed by the volume pressure method (Journal of the Japanese Society of Architectural Structural Engineering, Vol. 75, No. 650, p1043-1050, July 2008), JCI (Concrete Engineering Association). It is measured using the volumetric method described in the draft standard (porosity test method for porous concrete (draft)).

According to the construction method of the present invention, as described above, the mold frame panel is installed at a position apart from the lower end of the slope to be reinforced so that the mold surface rises at an angle equal to or greater than the inclination angle of the slope, Since the raw porous concrete is filled in the filling space between the panel and the slope and the raw porous concrete is hardened in the filling space to form the porous concrete wall portion, the conventional retention It is not necessary to provide a drain hole like a wall.
That is, spring water or the like from the slope side enters the porous concrete wall portion and is smoothly drained through the gap between the aggregates.
In addition, water does not accumulate on the slope side of the wall, and it is possible to prevent the sediment from flowing out to the wall surface side, the wall surface is contaminated by the outflow of sediment, and the sediment flows into roads and the like, causing a traffic obstacle. Can be prevented.

Moreover, it is only necessary to install the formwork panel on the front side of the wall, and since the fresh porous concrete has less fluidity than the ready-mixed concrete of ordinary concrete, a large load is applied to the formwork panel from the ground side at the time of filling. Since it is not necessary to support the formwork panel, the construction cost can be considerably reduced as compared with the ordinary concrete retaining wall.

It is sectional drawing seen from the side direction of the natural ground explaining the installation state of the 1st stage|mold frame panel of 1st Embodiment of the construction method of this invention. It is sectional drawing seen from the side surface direction of the formwork panel explaining the state which poured the raw porous concrete between the formwork panel and the ground as a post process of FIG. It is a typical sectional view explaining the process of explaining the state which formed the porous concrete wall part of the 2nd step on the porous concrete wall part of the 1st step. It is the schematic diagram which looked at the installation structure of the formwork panel which forms the porous concrete wall part of the 2nd step on the porous concrete wall part of the 1st step from the slanting upper direction. It is a schematic diagram showing the cross section seen from the side direction of the natural ground explaining the process of forming the porous concrete wall part of the 3rd step on the porous concrete wall part of the 2nd step. It is a figure explaining the state which formed the water permeable road surface along the water permeable wall. It is a figure explaining the process of providing a decorative layer on the rising surface of a water permeable wall. It is a 2nd embodiment of the construction method of this invention, Comprising: It is a schematic diagram showing the state before it was filled with the raw porous concrete of the porous concrete wall part of the 2nd step from the ground side view. .. It is a figure explaining the conventional normal concrete retaining wall.

Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.
1 to 7 show a first embodiment of a construction method of the present invention in the order of steps thereof.

That is, this construction method can form the slope reinforcing water permeable wall (hereinafter, referred to as “water permeable wall”) W as follows.
(1) By removing the soil and rubble from the slope failure, as shown in FIG. 1, the ground 1 having the slope is exposed and the ground where the lower surface of the permeable wall contacts is ground.
(2) If necessary, a thin cement film is formed on the surface of the natural ground 1 to the extent that sediment flow from the natural ground 1 before construction due to rainwater or the like can be prevented.
The cement coating can be obtained, for example, by sprinkling a thin cement liquid with rain or the like.
(3) A support pile P1 is driven into a ground between the wall front side formwork panel 2a, which will be described later, on the ground between the ground 1 and the top end of the support panel P1 so as to project from the GL by about 50 cm, if necessary.
The depth of driving the support pile K1 may be about 30 cm to 1 m, though it depends on the strength of the ground.
The pitch of the support piles K1 in the longitudinal direction of the wall is not particularly limited, but may be 1 m to 1.5 m.
The support pile K1 is not particularly limited as long as it can prevent the displacement of the porous concrete wall W described later, but for example, a concrete pile of 10 cm square can be mentioned.
(4) The anchor 5a is driven into the natural ground 1, and one end of the form panel supporting linear material (hereinafter referred to as "linear material") 6 is fixed to the natural ground 1 via the anchor 5a.
The above-mentioned filament material 6 includes a filament material, a filament material, and may be any of metal, resin, and composite material, but with respect to the alkaline component of cement and the alkaline component or acid component contained in rainwater or spring water. It is preferable to use a material having high corrosion resistance.
The water permeable wall W has a low height of 3 m or less, and when the height of only one step of the porous concrete wall W1 is sufficient, the anchor 5a and the linear member 6 may be omitted.
(5) The wall front side formwork panel 2a is supported between the ground 1 and the support 3 by the support pipe 3a and the horizontal support pipe 3b, and both end portions are closed by the wife side formwork panel 2b to fill the space. Form S.
The interval between the wall front side formwork panel 2a and the natural ground 1 is not particularly limited as long as the slope collapse of the natural ground 1 can be prevented, but the obtained first porous concrete wall portion W1 (second porous concrete wall portion W2). The third porous concrete wall W3) is preferably provided at intervals such that the thickness is 50 cm or more.
In addition, the support pipe 3a is provided substantially vertically and, as will be described later, above the upper end of the wall front side formwork panel 2a so that the second stage wall front side formwork panel 2a can be firmly supported. It has a length that sticks out. The interval between the pillar pipes 3a is appropriately determined according to an expected load applied to the front wall of the wall side formwork panel 2a when the raw porous concrete is filled.
(6) The support 3 is supported by the external support 4a whose lower end is fixed to the anchor 5a driven into the ground.
(7) The other end of the linear member 6 is penetrated through the wall front side formwork panel 2a, and the two horizontal support pipes 3b are faced between the two horizontal support pipes via the fixture 61. It is supported by the pipe 3b.
In such a state, the mold surface of the wall front side mold panel 2a is erected substantially perpendicular to the horizontal surface (including a case where it is slightly deviated from the vertical due to a construction error).
(8) Although not shown, raw porous concrete that has been premixed in a factory or the like and transported by a mixer truck or the like on the spot is fed from a hopper (not shown) (also referred to as raw concrete bucket or bakcan) As shown in FIG. 2, it is poured into the filling space S.
Before pouring the raw porous concrete, perforated pipes are arranged vertically and horizontally along the slope of the natural ground 1 to improve drainage so that the surface of the porous concrete wall W does not flow water mixed with earth and sand. Alternatively, as shown by a chain double-dashed line in FIG. 2, the drainage performance enhancing material may be added to the natural ground 1 side along the natural ground 1 to form the drainage promoting portion 10. ..
(9) The top of the poured raw porous concrete is leveled.
(10) The raw porous concrete is cured and hardened (about 1 day) to obtain the first porous concrete wall W1 of the first stage.
In addition, if necessary, before the green porous concrete for the first porous concrete wall portion W1 is cured and hardened, as shown in FIGS. 2 and 3, a support pile K2 such as a reinforcing bar has an upper end with the first porous concrete. It is embedded so as to project from the upper end of the wall portion W1, or is driven into the top end of the hardened first porous concrete wall portion.
(11) After the first-stage first porous concrete wall portion W1 is cured and hardened, as shown in FIGS. 3 and 4, the first-stage wall front side mold panel 2a and the wife-side mold panel 2b are left. In the state, on the first porous concrete wall portion W1 of the first stage, the lower end of the wall front side formwork panel 2a of the second stage is positioned as follows, except for the first stage The wall front side form panel 2a and the wife side form panel 2b of the second stage are installed in the same manner as the wall front side form panel 2a.
That is, the second wall front side formwork panel 2a includes a horizontal square bar 4c provided along the first-stage support pipe 3a and a horizontal square member 4c provided along the second-stage support pipe 3a. The space regulating corner member 4b is intermittently fitted between the corner member 4c and the corner member 4c, and the lower end is positioned.
The interval of the interval regulation square members 4b is not particularly limited, but is preferably 1 m to 1.5 m pitch.
(12) After installing the wall front side formwork panel 2a and the wife side formwork panel 2b, the second wall front side formwork panel 2a, the wifeside formwork panel 2b, the natural ground 1 and the first porous concrete wall The second-stage filling space S formed by the portion W1 is filled with fresh porous concrete in the same manner as in the first stage, and is cured and cured (about 1 day), so that the second-stage second concrete wall W2 in the second stage is filled. To get
If necessary, before the green porous concrete for the second porous concrete wall portion W2 is cured and hardened, as shown in FIGS. 3 and 4, the support pile K3 such as a reinforcing bar has the upper end of the first porous concrete. It is embedded so as to project from the upper end of the wall portion W1, or is driven into the top end of the hardened first porous concrete wall portion.
(13) Similarly to the second porous concrete wall W2 of the second step, as shown in FIG. 5, the third porous concrete wall W3 of the third step is obtained.
(14) As shown in FIG. 5, a part of the top of the third porous concrete wall W3 along the natural ground 1 is cut out to form the earth and sand receiving groove 7.
The earth and sand receiving groove 7 may be formed at the same time when the third porous concrete wall W3 is formed by forming a mold.
(15) As shown in FIG. 6, after removing all the formwork panels 2a, 2b, a perforated pipe 81 is embedded along the lower end of the water permeable wall W to form a water permeable road surface 8 made of porous concrete. Form.
(16) As shown in FIG. 7, the makeup layer forming material filling space S2 is formed between the rising surface and the thickness of the makeup layer to be obtained (for example, 1.5 to 2 cm). The form layer panel 2c for the decorative layer is installed along the rising surface of the 1-porous concrete wall W1.
Note that the decorative layer form panel 2c has a mold surface having a releasability of the decorative layer forming material 9.
(17) As shown in FIG. 7, the decorative layer forming material filling space S2 is filled with the decorative layer forming material 9.
The decorative layer forming material 9 is not particularly limited, but, for example, a binder resin in which a natural stone material is dispersed is used.
(18) Although not shown, a decorative layer is formed along the rising surfaces of the second porous concrete wall W2 and the third porous concrete wall W3 in the same manner as the first porous concrete wall W1.
(19) Although not shown, a decorative layer forming material is spread on the top ends of the first porous concrete wall portion W1, the second porous concrete wall portion W2, and the third porous concrete wall portion W3 to make the top end. A decorative layer is formed so as to cover.

According to the construction method described above, the water permeability that reinforces the slope of the natural ground 1 only by pouring the fresh porous concrete into the filling space S formed between the wall front side formwork panel 2a and the natural ground 1 by pouring. The wall W can be easily constructed.
Moreover, since the raw porous concrete is in a hardened state with sufficient strength in about one day, when the slope is collapsed due to a landslide or the like, the slope can be quickly reinforced.

Further, green porous concrete has a lower fluidity than ordinary green concrete, and thus is hard to spread in the horizontal direction and easily forms lumps.
Therefore, when the fresh porous concrete is filled, the load applied to the wall front side form panel 2a and the wife side form panel 2b can be small, so that the wall front side form panel 2a and the wife side form panel 2b can be used. The strength of the structural material that supports the structure can be reduced, and the construction cost can be reduced.

Further, since the wall front side formwork panel 2a is erected substantially vertically, the top end of the obtained porous concrete wall portion W1 (W2, W3) can be made flat, and the top end of the article such as a planter can be made flat. It can be effectively used as a mounting part.

Furthermore, the water permeable wall W is excellent in water permeability, and rainwater and spring water from the natural ground 1 side pass through the water permeable wall W and are smoothly drained.
Therefore, even if the drainage hole is not provided as in the conventional retaining wall, water does not accumulate on the ground 1 side of the water permeable wall W, and the outflow of earth and sand to the wall surface side can be prevented, and the wall surface It is possible to prevent pollution due to the outflow of water, and to prevent traffic damage caused by the inflow of earth and sand onto roads and the like.

Further, since the earth and sand receiving groove 7 is provided along the natural ground 1 between the top end of the porous concrete wall portion W3 at the uppermost stage and the natural ground 1, the natural rock above the water permeable wall W is grounded. When rainwater or spring water mixed with earth and sand flows down along the slope No. 1, rainwater or spring water mixed with earth and sand first flows into the sediment receiving groove. Then, the water permeates into the permeable wall from the bottom and side wall surface of the sediment receiving groove and is drained, but the sediment remains in the sediment receiving groove.
Therefore, it is possible to prevent the sand and sand from flowing into the wall surface from the top end of the water permeable wall W and keep the wall surface of the water permeable wall clean.

Further, the water-permeable wall W obtained by the above-described construction method has the linear member 6 fixed to the natural ground 1 by the anchor 5a inside, so that the water-permeable wall W is firmly supported by the natural ground 1. ..

In addition, although a part of a large rock may protrude from the natural ground 1, in this construction method, it is possible to embed it in the water permeable wall W including the protruding portion of the rock.
Further, an anchor may be driven into the protruding portion of the rock to enhance the anchor effect.

FIG. 8 shows a second embodiment of the construction method of the present invention.
As shown in FIG. 8, this construction method uses a linear material with anchors at one end in advance as a linear material for supporting the wall front side formwork panel 2a for constructing the porous concrete wall portion W2 (W3) of the second stage or more. The material is the same as that of the above-described first embodiment, except that the material 60 is used for construction as follows.

That is, in this construction method, the first wall front side mold panel 2a is supported by the anchor 5a and the linear member 6 driven into the natural ground 1 as in the first embodiment.
Then, before filling the first-stage (second-stage) filling space S with green porous concrete, the open end side of the linear material 60 with anchors where the anchor 5c is not provided is arranged outside the filling space S. In this state, the anchor 5c is supported at a predetermined position in the filling space S for forming the first porous concrete wall W1 (second porous concrete wall W2) of the first stage (second stage), for example, by a horizontal streak or the like. Make it fixed.

Next, fresh porous concrete is formed in the filling space S to form a first porous concrete wall portion W1 (second porous concrete wall portion W2) in the same manner as in the first embodiment, and the anchor 5c is used as the first porous concrete wall portion W1. It is embedded and fixed in the (second porous concrete wall W2).

Then, the second-stage (third-stage) wall front side formwork panel 2a is erected on the first porous concrete wall portion W1 (second porous concrete wall portion W2), and the open end of the wire material 60 with an anchor is provided. The side is faced between the horizontal support pipes 3b of the second-stage (third-stage) support structure 3 and fixed by the fixture 61.
After that, similarly, fresh porous concrete is filled in the second-stage (third-stage) filling space S.

According to this construction method, when forming the porous concrete wall portion W2 (W3) of the second and subsequent stages, it is not necessary to drive the anchor 5a into the natural ground 1 and the workability is improved.

The present invention is not limited to the above embodiment.
For example, in the above-mentioned embodiment, the construction method of the present invention was used for repairing and reinforcing a slope that caused a slope failure due to a landslide, etc. It can also be used when the drainage of sediment and outflow of weeds is troublesome on the banks such as cultivated land, and when the drainage function of the retaining wall and the surroundings is important due to continuous spring and running water.

In the above-described embodiment, since the porous concrete wall portion is provided in a staircase shape, the support pipe of the supporting work has a length protruding above the upper end of the formwork panel. However, when only one stage is provided, It does not have to protrude above the top edge of the frame panel.
In the above-described embodiment, the water-permeable road surface is provided after the water-permeable wall is constructed, but the water-permeable road surface may be provided before the water-permeable wall is constructed, and there is no water-permeable road surface. I don't mind.

In the above embodiment, the decorative layer is provided along the rising surface and the top surface of each porous concrete wall portion, but the decorative layer may not be provided or may be provided only on the rising surface. I do not care.
In the second embodiment described above, the anchor portion of the wire material with anchors is first embedded and fixed in the lower porous concrete wall portion, and then the open end side of the wire material with anchors is attached between the horizontal support pipes for supporting work. It was designed to fix the open end side of the wire material with anchors through the through hole, but before filling the lower filling space with fresh porous concrete, the front side of the wall that forms the next filling space After vertically supporting the formwork panel by supporting work, the open end side of the wire material with anchors is passed between the horizontal support pipes supporting the formwork panel on the front wall side of the next stage, and is temporarily fixed with the fixture. After the anchor part is supported and fixed at a predetermined position in the lower filling space, the lower filling space may be filled with fresh porous concrete and the anchor part may be embedded and fixed.

W Slope Reinforcing Wall W1 First Porous Concrete Wall W2 Second Porous Concrete Wall W3 Third Porous Concrete Wall S Filling Space K1, K2, K3 Support Piles 1 Ground 2a Wall Front Side Form Panel 2b Wife Side form panel 2c Form layer panel 3 for decorative layer Support 3a Strut pipe 3b Horizontal support pipe 4a External support 4b Spacing bar 4c Horizontal bar 5a, 5c Anchor 6 Form bar support wire 60 Anchor wire 61 Fixing Tool 7 Sediment Receiving Groove 8 Water-permeable Road Surface 81 Perforated Tube 9 Decorative Layer Forming Material 10 Drainage Promotion Section

Claims (7)

A method of constructing a permeable wall for slope reinforcement comprising at least a porous concrete wall portion formed by porous concrete,
The wall front side formwork panel is installed at a position away from the lower end of the slope to be reinforced so that the mold surface rises at an angle equal to or greater than the slope angle of the slope, and the wall front side formwork panel and the slope surface Characterized in that it includes a porous concrete wall portion forming step of filling a raw porous concrete in a filling space formed between and, and curing the raw porous concrete in the filling space to form the porous concrete wall portion. Construction method of permeable wall for slope reinforcement. The method for constructing a permeable wall for slope slope reinforcement according to claim 1, wherein the porous concrete wall portion forming step is repeated toward the upper side of the slope to form a plurality of stages of the porous concrete wall portion in a stepwise manner. The method for constructing a permeable wall for slope slope reinforcement according to claim 1 or 2, wherein the mold surface of the wall front side formwork panel is made substantially perpendicular to a horizontal plane. 4. A road surface forming step of providing a water permeable road surface that communicates with a lower end of the slope water permeable wall along the position where the slope reinforcement water permeable wall is provided and that also connects to a drainage path. The method for constructing a permeable wall for slope reinforcement according to any one of claims. The raw porous concrete is filled into the filling space in a state where a drainage performance enhancing material forming a drainage promoting portion is arranged along the slope side of the filling space in the porous concrete wall portion forming step. ~ The method for constructing a permeable wall for slope reinforcement according to claim 4. 6. The slope-permeable water permeability according to claim 1, wherein a sediment receiving groove, which is recessed from the top end surface, is provided at an end of the uppermost slope end of the porous concrete wall along the slope surface. How to build a wall. The decorative layer forming form panel is arranged so as to form a decorative layer forming material filling space between the rising surface of the polar concrete wall portion, a resin binder, and a decorative layer forming material containing natural stone, A method comprising pouring into a makeup layer forming material space, curing the resin binder in the makeup layer forming material space, and forming a water-permeable makeup layer along a rising surface of the porous concrete wall portion. The method for constructing a permeable wall for slope reinforcement according to claim 6.

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