JP2016191272A - Construction method for slope structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for a slope structure enables the slope structure to be constructed in a short period of time by eliminating burdensome work such as installation of a filling concrete mold, at the same time reducing material costs and therefore reducing construction costs.SOLUTION: A construction method for a slope structure (an erosion control weir 1') is for constructing a structure having a slope by forming a slope surface (an upstream-side slope body 3) by laying a plurality of protective panels 30 next to each other, and filling a filler material 2 inside the protective panel 30 that forms the slope. The construction method for the slope structure includes the following steps: a wire net cutting step in which a wire net 6 is cut to suit a gap space Y formed on an outer side of the slope between a side edge X at each tier of the protective panel 30 laid in tiers and a ground G on which the erosion control weir 1' is to be installed; a wire net erection step in which the cut wire net 6 is erected in a direction almost orthogonal to the slope surface at the side edge X; and an out-of-the-slope-surface filling step in which an external filler material 2' is filled in a part outside of the slope surface to the wire net 6 that has been erected.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a method for constructing a slope structure in which a plurality of protection panels are arranged side by side to form a slope, and a slope structure is constructed by filling a filler in the protection panel forming the slope.

  Conventionally, civil engineering structures (slope structures) having slopes such as dams and retaining walls are generally concrete structures constructed by placing concrete. For example, Patent Document 1 discloses a construction method for a civil engineering structure in which a steel sheet pile is used as an outer wall material that also serves as a concrete formwork and is filled with concrete inside (Patent Document 1 claims). (See claim 1 of the scope, paragraph [0018] of the specification, FIG. 1 of the drawings, etc.).

  However, in recent years, when these structures are constructed by excavating natural ground, the cost of transporting the earth and sand generated by excavation and the disposal cost for temporary storage, etc. can increase and lead to environmental destruction In order to reduce the amount of earth and sand generated as much as possible, a slope is formed by arranging multiple protective panels side by side, and soil cement that is a mixture of earth and sand generated by excavation and cement milk is formed to protect the slope. A construction method of a slope structure for constructing a slope structure filled in a panel has been proposed.

  In the slope structure construction method for constructing the slope structure by filling such soil cement or the like, as described in paragraph [0016] of the specification of Patent Document 2, the natural ground and the external protective material are used. It takes a lot of work days to install the formwork of the stuffed concrete 120, the curing period of the concrete, the formwork dismantling etc. There was a problem.

  In order to solve such a problem, Patent Document 2 discloses a construction method of a sabo dam that constructs a sabo dam by coating an upstream side surface and a downstream side surface of a dam body with an external protection material, and the external protection material Forming a foundation leveling concrete that supports the lower end of the base, a step of assembling the external protection material on the foundation leveling concrete, and a step of forming a gap between the external protection material and the ground And a step of placing an inner member between the outer protective materials, and the padding is substantially the same shape as a gap between the ground and the outer protective material, and the face plate A vertical plate connected to the side edge of the outer plate, a horizontal plate connected to the upper edge of the face plate and the upper end of the vertical plate, the lower end of the external protective material not connected to the foundation leveling concrete is Method for constructing a sabo dam connected to the interleaved horizontal plate It is disclosed (claim 7 of the claims of Patent Document 2, specification paragraphs [0040] and [0049], figures 7, see FIG. 9, etc.).

  According to the construction method of the sabo dam described in Patent Document 2, in each construction process of the sabo dam, the ratio of the number of days required for construction, such as formwork installation, concrete placement, curing, removal of formwork, etc. of the interstitial concrete is It is said that there is an advantage that a sabo dam can be constructed in a short period of time because there is no process for forming a high concrete space and only a simple space is attached.

  However, in the construction method of the sabo dam described in Patent Document 2, it is necessary to create a face plate 22 having substantially the same shape as the gap 20 between the natural ground and the external protective materials 14 and 16 as the space 20. The gap on the steep slope is measured, and there is a problem that it is difficult to process the face plate 22 of the padding 20 made of steel plates on the spot according to the measurement result. In addition, it takes time for processing and also requires a vertical plate 24 and a horizontal plate 26 made of steel, and the material cost of the padding 20 is high, resulting in an increase in construction cost.

JP 2002-221933 A JP, 2014-190100, A

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to omit a time-consuming work such as setting up a formwork of a compacted concrete in a short period of time. It is another object of the present invention to provide a method for constructing a slope structure that can construct a slope structure and can reduce a material cost by reducing a construction cost.

  According to a first aspect of the present invention, there is provided a slope structure having a slope by forming a slope by arranging a plurality of protection panels and filling the protective panel forming the slope with a filler. A method for constructing a slope structure to be constructed, wherein a gap is formed on the outside of the slope between a side edge of each stage of the protection panel arranged side by side and a natural ground on which the slope structure is installed. A wire mesh cutting step for cutting the wire mesh in accordance with the space, a wire mesh standing step for standing the cut wire mesh in a direction substantially perpendicular to the slope at the side end, and the standing wire mesh outside the slope. A slope external filling step of filling the external filler.

  The construction method of a slope structure according to a second aspect of the invention is that in the first aspect, in the slope external filling step, the same filler as the filler filled in the protective panel is filled outside the slope as the external filler. It is characterized by doing.

  A method for constructing a slope structure according to a third aspect of the present invention is the first aspect of the invention according to the first aspect or the second aspect, wherein the leveling concrete is a foundation for mounting the protective panel on the external filler filled in the slope external filling step. It is characterized by having an intermediate foundation leveling concrete placing process.

  In the construction method of the slope structure according to the fourth invention, in the invention of any one of the first invention to the third invention, a steel panel that is bent to enhance bending rigidity is used as the protective panel. It is characterized by.

  According to a fifth aspect of the present invention, there is provided a slope structure according to any one of the first to fourth inventions, wherein the soil cement obtained by mixing solidified material with earth and sand is used as the filler and / or the external filler. It is used.

  According to the first to fifth inventions, it is possible to construct a slope structure in a short period of time by omitting time-consuming work such as setting up and disassembling of formwork of the space-filled concrete, which has been necessary in the past, and Material costs can be reduced and building costs can be reduced. Moreover, since it is a wire mesh that is installed in the wire mesh erection process, it is less expensive than a steel plate or the like, and the installation cost can be reduced as a discarded frame. In addition, since the wire mesh is cut in the wire mesh cutting step, it can be cut manually by using a wire cutter or a nipper. For this reason, it is not necessary to install a gas cylinder for fusing or to draw a power source for a cutting cutter. In addition, in the external filling process, the external filler can be dammed with a wire mesh, and rainwater can escape from the gaps in the wire mesh, so there is no risk of rainwater collecting during construction and hindering work in the subsequent process. .

  In particular, according to the second invention, in the slope external filling step, the same filler as that filled in the protective panel is filled as the external filler on the outside of the slope, so that the external filler is different from the filler. In addition, it is possible to carry out the slope external filling process continuously with the filling material filling process in which the protective panel is filled with the filling material, and the filling material and the external filling continuously in the rolling process of the next process. The material can be rolled and compacted. For this reason, a slope structure can be constructed in a shorter period of time.

  In particular, according to the third aspect of the present invention, it is possible to reduce the material cost by reducing the concrete to be placed from the conventional concrete, and to vibrate by the wind as compared with the case where the protective panel (slope structure) is mounted on the steel material. Without this, the protective panel can be stably supported.

  In particular, according to the fourth invention, a steel panel that has been bent to enhance bending rigidity is used as a protective panel, so that the material cost is reduced by using a light and inexpensive steel panel for the required strength. Not only can this be done, but also the installation cost of the slope structure can be further reduced by reducing the size of the crane and other lifting equipment used when installing the protective panel. Furthermore, it is also possible to carry out lifting and attachment work manually by carrying one by one.

  In particular, according to the fifth invention, since the soil cement in which the solidified material is mixed with the earth and sand is used as the filler and / or the external filler, the transportation cost for transporting the earth and sand generated by excavation and the disposal cost of the earth and sand, etc. The cost can be reduced. Moreover, environmental destruction can also be prevented.

It is the perspective view which looked at the slope structure constructed | assembled by the construction method of the slope structure which concerns on embodiment of this invention from the upstream of the valley (sawa). It is a vertical sectional view which shows the structure of the slope structure same as the above. It is a perspective view which cuts a part from the downstream and shows the state which is not filled with a filler in order to demonstrate the structure of a slope structure same as the above. It is a back surface perspective view which mainly shows the structure of the upstream slope body of a slope structure same as the above. It is drawing which shows the steel sheet pile which comprises an upstream slope body same as the above, A figure is a front view which arranged the longitudinal direction of the steel sheet pile vertically, and B figure is a plane which shows the fore which is the upper end surface of the longitudinal direction of a steel sheet pile FIG. It is a perspective view which shows the state which installed the 1st-stage steel sheet pile of the upstream slope body of FIG. It is a back surface perspective view which mainly shows the structure of the downstream slope body of the slope structure of FIG. It is drawing which shows the concrete panel which comprises a downstream slope body same as the above, A figure is a front view which has arrange | positioned the longitudinal direction of a concrete panel sideways, B figure is a right side which shows the fore which is the right end surface of the longitudinal direction of a steel sheet pile FIG. It is drawing which shows other embodiment of a concrete panel same as the above, A figure is a front view which turned the longitudinal direction of the concrete panel sideways, B figure is a right view which shows the fore which is the right end surface of the longitudinal direction of a steel sheet pile. is there. It is a perspective view which shows the state which looked at the construction middle of the slope structure same as the above from the back surface side of the downstream slope body. It is an upstream elevation which shows the upstream slope of the slope structure which concerns on another embodiment of this invention. It is a downstream elevation which shows the downstream slope of a slope structure same as the above. It is a vertical sectional view which shows the structure of the slope structure same as the above. It is a flowchart of the construction method of the slope structure which concerns on embodiment of this invention. It is process explanatory drawing which shows the natural ground excavation process of the construction method of a slope structure same as the above. It is process explanatory drawing which shows the foundation leveling concrete placement process of the construction method of a slope structure same as the above. It is process explanatory drawing which shows the protection panel assembly process of the construction method of a slope structure same as the above, and a filler filling process. It is process explanatory drawing which shows the wire-mesh cutting process of the construction method of a slope structure same as the above, a wire-mesh standing process, a slope external filling process, etc. It is a perspective view which shows the wire-mesh standing process of the construction method of a slope structure same as the above, the slope external filling process, etc.

  Hereinafter, a method for constructing a slope structure according to an embodiment of the present invention will be described in detail with reference to the drawings.

[Configuration of slope structure]
First, the structure of the slope structure constructed | assembled with the construction method of the slope structure based on embodiment of this invention is demonstrated using FIGS. As shown in FIG. 1, a sabo dam provided to prevent a debris flow in a valley will be described as an example of the slope structure according to the embodiment.

  As shown in FIG. 1 and the like, a sabo dam 1 that is a slope structure according to the present embodiment is a soil in which a levee body 10 having a substantially trapezoidal cross section is constructed so as to dam a river flowing through a valley. It is a cement gravity type impervious sabo dam, and an overflow section 11 is provided near the center of the river to flow water downstream.

  As shown in FIG. 2, the sabo dam 1 includes a filler 2 that is an inner member constituting the interior of the dam body 10, an upstream slope body 3 that covers and protects the outer surface of the dam body 10, and a downstream slope. It is comprised from the body 4 and the top end concrete 5 etc. which are the capping concrete which covers and protects the top end surface of the top part of the bank body 10. FIG.

<Filler>
The filler 2 according to the present embodiment is so-called soil cement, and the generated earth and sand generated by excavation and the like in the field are mixed with stirring, and between the upstream slope body 3 and the downstream slope body 4. Filled. This filler 2 stably maintains the predetermined shape of the dam body 10 by solidifying the hydrate while containing the particles of the earth and sand by the hydration reaction between the moisture contained in the generated earth and the cement component of the solidifying material. In addition, it occupies most of the weight of the dam body 10 and has a function to counteract debris flow with its weight.

  The generated earth and sand is sieved to adjust the particle size, and the moisture content is measured to determine the composition of the solidified material. A crusher run or the like may be mixed in the filler 2 as necessary.

  Since the solidifying material according to the present embodiment is inexpensive and generates a relatively small amount of heat due to a chemical reaction, a cement-based solidifying material is used. However, the solidifying material according to the present invention may be a lime-based solidifying material, or a special soil solidifying material or a polymer flocculant may be used according to the generated earth and sand. In short, the solidifying material according to the present invention is applicable as long as it encloses and solidifies particles of the generated earth and sand.

  As described above, the soil cement is exemplified as the filler 2 according to the present embodiment. However, the filler according to the present invention only needs to have a weight capable of resisting debris flow, and therefore it is possible to use only earth and sand. Moreover, although construction cost becomes high, you may cast concrete as a filler like the invention described in patent document 1. FIG.

  Thus, since the soil cement is used as the filler 2 according to the present embodiment, it is possible to reduce costs such as transportation costs for transporting the generated sediment generated by excavation and disposal costs for the sediment. Moreover, environmental destruction can also be prevented.

<Upstream slope body>
As shown in FIGS. 3 and 4, the upstream slope body 3 of the sabo dam 1 is protected so that a plurality of protective panels 30 covering and protecting the outer surface and the leg portions of these protective panels 30 are not bent. A single foundation beam 31 to be supported, a plurality of angle members 32 attached to the foundation beam 31 to support the upstream inclined body 3 at a predetermined inclination angle, and the abdomen of the protective panel 30 are not bent. In this way, it is composed of a plurality of erected members 33 that are supported in this manner, a single levee member 34 that is provided along the upper end of the protective panel 30, and the like.

(Protective panel)
The protection panel 30 according to the present embodiment used for the upstream slope body 3 is required for the reason that the strength capable of withstanding the impact load of the debris flow is required and the weight is capable of being transported and attached by human power. The lightweight steel sheet pile shown in FIG. 5 is adopted. This lightweight steel sheet pile is a lightweight steel sheet pile having a thickness of 4 mm made of general structural rolled steel (SS400), and the outer surface is coated for rust prevention.

  As shown in FIG. 6 and the like, this protective panel 30 has a horse-paste shape in which the upper and lower ends are staggered so that the longitudinal ends are aligned and there is no strong weak point, and the convex and concave surfaces are alternately arranged. It is attached to become. The protection panels 30 are joined to each other so that the ends (left and right edges) of the light steel sheet pile shown in FIG.

  Of course, other steel panels such as a deck plate and a corrugated steel plate that are bent to increase the bending rigidity can be suitably used for this protective panel, even if it is not a lightweight steel sheet pile. By using a light and inexpensive steel panel for the required strength as a protective panel, not only can the material cost be reduced, but also the slopes due to the downsizing of cranes and other hoists used to install the protective panel The installation cost of the structure can be further reduced. Furthermore, it is also possible to carry out lifting and attachment work manually by carrying one by one.

  However, a panel material made of a material other than steel, such as a resin panel, can be used for the protective panel as long as it has a desired strength.

(Foundation beam)
The foundation beam 31 is a grooved steel (125 × 65 × 6 × 8) made of general structural rolled steel (SS400) whose outer surface is coated for rust prevention. As shown in FIG. It fixes to the foundation leveling concrete F1 which consists of the below-mentioned angle material 32 and reinforced concrete. The foundation beams 31 are connected to each other by joining the ends of the foundation beams 31 at a joining angle made of angle steel (L-65 × 65 × 6).

(Angle material)
The angle member 32 is a member in which angle steel (L-65 × 65 × 6) made of rolled steel for general structure (SS400) whose outer surface is coated for rust prevention is combined in a triangular shape for protection. It is comprised from the pillar material 32a along the panel 30, the connecting material 32b attached along the foundation leveling concrete F1, and the support material 32c which is the diagonal material which connects these pillar materials 32a and the connecting material 32b. In addition, the angle member 32 has a function of installing the upstream side slope body 3 on the foundation leveling concrete F1 at a predetermined angle by fixing the connecting material 32b to the foundation leveling concrete F1 with an anchor bolt.

(Upset material)
The anti-raised material 33 is made of angle steel (L-75 × 75 × 6) made of general structural rolled steel (SS400) whose outer surface is coated for rust prevention. It is provided over. The angling member 33 has a function of stopping the protective panel 30 and preventing the protective panel 30 from swelling to the upstream side or from being dented to the downstream side. Further, the flank members 33 are connected to each other by joining the end portions of the butt members 33 with a joining plate made of 6 mm thick steel strip (PL-6 × 119 × 513.4). doing.

(Anchor material)
In addition, as shown in FIG. 4 and the like, an anchor member 35 in which a hook is formed by bending at the tip of the deformed reinforcing bar (SD295) of D19 is provided on the bulging member 33 at predetermined intervals. Projected to the inside. The anchor material 35 has a function of fixing the angling material 33 to the filler 2 and preventing the connection body of the plurality of protective panels 30 together with the angling material 33 from expanding to the outside (upstream side). ing.

(Bank material)
The embankment material 34 is a grooved steel (125 × 65 × 6 × 8) made of general structural rolled steel (SS400) whose outer surface is coated for rust prevention and covers the upper end of the protective panel 30. Thus, it has a function of increasing the bending strength of the upper end of the entire upstream slope body 3. The bank material 34 will be described in detail later.

<Downstream slope>
As shown in FIG. 3 and FIG. 7, the downstream slope body 4 of the sabo dam 1 has a plurality of protective panels 40 that cover and protect the outer surface, and leg portions at the left and right ends of these protective panels 40. A plurality of support angles 41 that are fixed at an inclination angle, a plurality of upper and lower connecting members 42 that connect the protective panels 40 up and down, and a plurality of pacies 43 that are left and right connecting members that connect the protective panels 40 side to side. Etc.

(Protective panel)
The protection panel 40 according to the present embodiment used for the downstream slope body 4 has a high design property in FIG. 8 because the debris flow is unlikely to be directly hit and the surface is always visible from the downstream area. The concrete panels shown are adopted. The concrete panel is a rectangular panel (width 1495 × height 1020) that is horizontally long and made of reinforced concrete having a thickness of 150 mm, and hooks 40a for holding anchor materials 44 described below are installed near the four corners of the back surface. ing.

  Also, as shown in FIGS. 10 and 7, etc., the protective panel 40 also has upper and lower ends that are staggered so that the upper and lower ends of the panels are aligned and there is no weak point in strength. It is attached to a horse.

  In addition, as a protection panel, although the surface (side surface used as a downstream side) demonstrated and demonstrated the thing of the smooth surface type, as shown in FIG. 9, the masonry pattern type protection panel 40 'which improved the designability further is shown. It can also be. Moreover, it is good also as a steel panel by which bending processing, such as the same steel sheet pile as the above-mentioned protection panel 30, was carried out. Furthermore, since it is a protective panel installed on the downstream side, there is no need to consider river erosion and the like, so an expanded panel provided with a large number of holes can be used to improve drainage.

(Support angle)
The support angle 41 is a member in which angle steel (L-125 × 75 × 7) made of general structural rolled steel (SS400) whose outer surface is coated for rust prevention is combined in a triangular shape to protect it. A column material 41a having a length of 480 mm along the panel 40, a base material 41b having a length of 480 mm attached along the foundation leveling concrete F2, and a diagonal material having a length of 600 mm connecting the column material 41a and the base material 41b. 41c and the like. Further, as shown in FIG. 7, the support angle 41 has a base material 41b fixed to the foundation leveling concrete F2 with anchor bolts so that the first-stage protective panel 40 is placed on the foundation leveling concrete F2 made of reinforced concrete. Has a function of being installed at a predetermined angle.

(Upper and lower connecting material)
The upper and lower connecting member 42 is a member having a length of 810 mm made of angle steel (L-125 × 75 × 7) made of general structural rolled steel (SS400) whose outer surface is coated for rust prevention. As shown in FIG. 7, the upper and lower protection panels 40 are connected to each other by being bolted to an insert embedded in the back surface of the protection panel 40. Note that two inserts are embedded in each panel to prevent rotation.

(Left and right connecting material)
7 is a flat steel (4.5 x 60 x 280) with a thickness of 4.5mm made of general structural rolled steel (SS400) whose outer surface is coated to prevent rust. As shown in FIG. 3, the left and right protection panels 40 are connected to each other by being bolted to an insert embedded in the back surface of the protection panel 40.

(Anchor material)
The anchor material 44 is a member made of a D16 deformed reinforcing bar (SD295) and having hooks formed at both ends by bending. The anchor member 44 has one hook hooked on the hook 40a of the protective panel 40 and the other hook inserted into the filler 2 to fix the protective panel 40 to the filler 2 to make a plurality of sheets. It has the function which prevents that the connection body of this protection panel 40 swells outside (upstream side).

[Slope structure construction method]
Next, the construction method of the slope structure which concerns on embodiment of this invention is demonstrated using FIGS. As shown in FIGS. 11 to 13, the case where a sabo dam 1 ′ similar to the above sabo dam 1 is constructed as a slope structure will be described. In addition, the same structure as the sabo dam 1 is attached | subjected with the same code | symbol, and description is abbreviate | omitted. 11 is an upstream elevation view mainly showing the upstream slope of the sabo dam 1 ′, and FIG. 12 is a downstream elevation view mainly showing the downstream slope of the sabo dam 1 ′. Fig. 2 is a vertical sectional view of the sabo dam 1 '. In short, the sabo dam 1 'and the sabo dam 1 are different only in the combination of the protection panels and the shapes of the dam body 10' and the dam body 10.

(1) Natural ground excavation step As shown in FIG. 14, first, natural ground G is excavated into a predetermined shape shown in FIGS. 15 and 16 in accordance with the design of the sabo dam 1 ′.

(2) Foundation leveling concrete placing process Then, the position of the upstream slope body 3 and the downstream slope body 4 is determined by surveying, etc., a temporary frame is installed, a predetermined deformed reinforcing bar is placed, Concrete is placed in the frame, and the above-mentioned foundation leveled concrete F1 and F2 are placed below each of the upstream slope body 3 and the downstream slope body 4 (see FIGS. 15 and 16). . Thereafter, the temporary frame is removed.

(3) Protection panel assembling step Next, the angle members 32 and the support angles 41 are set on the concrete F1 and F2, and the protection panels 30 and 40 are alternately mounted side by side in a horse-paste shape, and are attached to the upstream inclined body. 3 and the first stage of the downstream sloped body 4 are assembled (see also FIGS. 6 and 10). At this time, after the protection panel 30 is lifted to the vicinity of the top of the dam body 10 by a crane or a heavy machine, it is lightweight and can be manually installed by an operator. In addition, since the protection panel 40 is heavy, it installs using lifting equipment, such as a hanging jig and a crane according to the design method gradient.

(4) Filling material filling process Next, from the construction site of the sabo dam 1 ', the filling material 2 made of the above-mentioned soil cement mixed with the generated earth and sand and the solidified material is brought in by a dump truck or the like in a separate yard. The filling material 2 is filled up to the height of the anchor materials 35 and 44 and spread with a bulldozer or a backhoe.

(5) Wire mesh cutting process Moreover, in the construction method of the slope structure according to the present embodiment, the wire mesh 6 is erected in a direction substantially orthogonal to the upstream slope body 3 in the next process in parallel with the filler filling process. Therefore, at the side end X of each step of the protection panels 30 arranged side by side as shown in FIG. 11, as shown in FIGS. 17 to 19, the outside of the extension line of the ground slope G and the upstream slope body 3 The wire mesh 6 is cut into an inverted trapezoidal shape (see the alternate long and short dash line in FIG. 17, see FIG. 19) in accordance with the gap space Y formed between the two.

  At this time, since the wire mesh 6 is cut, it can be cut manually by using a metal cutter or a nipper. For this reason, there is an advantage that it is not necessary to install a gas cylinder for fusing or to draw a power source for a cutting cutter.

  The wire mesh 6 according to the present embodiment is an expanded metal formed of a steel plate, but has strength and rigidity sufficient to withstand the earth pressure of the external filler 2 ′ integrally with a support rod 7 described later. In addition, as long as it is easy to cut by human power, other wire meshes such as a lath mesh, a welded wire mesh, and a crimp wire mesh can be substituted.

(6) Wire mesh erecting step And, as shown in FIG. 19 and FIG. 18, the upstream slant body 3 at the side end X (see FIG. 11, etc.) It is erected in a direction substantially perpendicular to the slope of the outer wall of the outer filling material 2 ′. Here, “substantially orthogonal” does not mean that the wire mesh 6 is set up parallel to or along the slope of the upstream slope body 3 but is installed in a direction where the surfaces of the metal mesh 6 to be set up are orthogonal to each other. Does not mean strictly vertical.

  At this time, in order to resist earth pressure on the outside of the wire mesh 6 (outside the gap space Y), the support rods 7 are installed in a lattice shape and supported. For the support rod 7 according to the present embodiment, inexpensive deformed reinforcing bars (SD295) of about D13 to D19 are adopted, but any rod material that can resist earth pressure can be adopted regardless of the material. .

  Moreover, in the construction method of the slope structure according to the present embodiment, the wire mesh 6 and the support bar 7 are fixed by welding, but of course, they may be fixed by a binding wire, an annealed iron wire, or the like. Alternatively, it may be fixed with a binding band made of resin.

  Thus, by standing the wire mesh 6 at the side end X, one surface of the gap space Y (see FIG. 19 and the like) formed between the natural ground G and the outside of the extension line of the upstream slope body 3 is formed. It can be dammed with the wire mesh 6, and all other surfaces of the gap space Y are surrounded by the natural ground G, so that it is not necessary to install another formwork. In addition, when placing the interstitial concrete by the conventional construction method, since it was before filling with the filler as the timing of placing, a formwork was also required at the end of the levee body.

  In addition, since the metal mesh 6 is installed as a discarded frame, rainwater can escape from the gaps of the metal mesh 6, and there is no possibility that the rainwater accumulates during construction and hinders the work of the subsequent process.

(7) Slope exterior filling process Next, in the construction method of the slope structure according to the present embodiment, the wire mesh 6 erected in the wire mesh erection process is used as a discarded frame and is outside the slope of the upstream slope body 3. The external space 2 ′ is filled up to the wire mesh 6 in the gap space Y (see FIG. 19 and the like).

  This external filler 2 'is the same soil cement as the filler 2 described above, but since the strength is not required more than the internal filler in the protective panel 30, only the generated sediment without mixing the solidifying material is sufficient. is there. However, although the material cost for mixing the solidifying material and the like becomes high, the external slope filling process can be performed continuously with the filling material filling process by using the same material as the external filling material 2 ′ and the filling material 2. , Work efficiency is improved.

(8) Rolling step Next, the filler 2 is run on a spread roller 2 and an external filler 2 'by a vibrating roller or a bulldozer to roll and compact the filler 2. Of course, you may roll with a rolling machine, a ramma, etc.

(9) Anchor material installation process Next, the anchor materials 35 and 44 are mounted (set) on the filler 2 that has been compacted by compaction, and one end is attached to the protection panels 30 and 40. In addition, as shown in FIG. 17, since the installation height of the protection panel 40 and the anchor materials 35 and 44 of the protection panel 30 is different, the filler 2 is filled in a plurality of times. It is not necessary to perform the rolling step at every timing of anchor material installation. The number of times required for rolling and compacting may be appropriately determined from the thickness, viscosity, etc. of the filler 2.

  Next, the protective panel assembling step → filler filling step → slope external filling step → rolling step → anchor material installation step is repeated in the second and third steps of the upstream slope body 3.

(10) Intermediate foundation leveling concrete placing process And, as shown in FIG. 18 and the like, the filling of the external filler 2 'is performed up to the height of the intermediate foundation leveling concrete F3 installed below each step of the protective panel 30. When it is done, a temporary frame is installed in the same manner as the foundation leveling concrete F1, a predetermined deformed reinforcing bar is arranged, and the concrete of the intermediate foundation leveling concrete F3 made of reinforced concrete is placed.

(11) Forming process After that, the uppermost protection panel assembly process → filling material filling process → slope external filling process → rolling pressure process → anchor material installation process is performed, and the upper direction is along the upper end of the protection panel 30 (40) Install the formwork of the top concrete 5 that extends to In addition, since the embankment material 34 which has a plane on the upper surface is installed in the upstream slope body 3, it is possible to efficiently perform the installation work of the mold having a right angle to the plane of the embankment material 34. it can. For this reason, a mold installation operation can be performed in a short time.

(12) Top-end concrete placing step Next, concrete is placed in the mold set in the previous step, and the top-end concrete 5 that protects the top end of the filler 2 from rainwater erosion is constructed.

(13) Temporary material removal process Next, temporary materials, such as the formwork of the top concrete 5 and a temporary scaffold, are removed, and construction of sabo dam 1 'which is a slope structure is complete | finished.

  According to the construction method of the slope structure according to the embodiment of the present invention described above, the slope structure can be obtained in a short period of time by omitting time-consuming operations such as installing and disassembling the formwork of the space-filled concrete which has been necessary in the past. Can be built. Moreover, it can be set as the intermediate foundation leveling concrete F3 which reduced the capacity | capacitance of the concrete cast | casted from the conventional filling concrete, and material cost can be reduced.

  Moreover, according to the construction method of the slope structure according to the present embodiment, the concrete formwork that has been conventionally required is obtained by using the wire mesh 6 made of expanded metal and the support rod 7 made of deformed reinforcing bars (steel bar) as a discarded frame. The work cost can be greatly reduced.

  In addition, according to the construction method of the slope structure according to the present embodiment, the invention also requires an equivalent to intermediate foundation leveling concrete, even compared to the steel plate of the invention described in Patent Document 2. In view of this, the construction method of the slope structure according to the present embodiment, which does not require any labor for processing the steel material or the like with only the material costs of the wire mesh 6, the support rod 7, and the external filler 2 ', is the sabo dam that is a slope structure. Clearly, 1 'building costs can be significantly reduced.

  Moreover, according to the construction method of the slope structure according to the present embodiment, as in the invention described in Patent Document 2, vibration is caused by wind as compared with the case where the protective panel 30 (upstream slope body 3) is attached on the steel material. The protective panel 30 can be stably supported without the need to do so.

  As described above, the construction method of the slope structure according to the embodiment of the present invention and the slope structure constructed by the method have been described in detail. However, any of the above-described or illustrated embodiments is specific for carrying out the present invention. However, the technical scope of the present invention should not be interpreted in a limited manner.

  In particular, the slope structure having two slopes of the upstream slope body and the downstream slope body has been described as an example of the slope structure, but the slope structure having a slope only on one side, such as a retaining wall of a river bank. It can also be applied to.

  Moreover, although the sabo dam was mentioned as an example, the use of a slope structure is not restricted to sabo etc., It can apply to various uses, such as a normal dam and a retaining wall. In short, the present invention can be applied to slope structures having slopes on one side.

1,1 ': Sabo dam (slope structure)
10, 10 ': Embankment 11, 11': Overflow part 2: Filling material 2 ': External filling material 3: Upstream slope body 30: Protection panel 31: Foundation beam 32: Angle material 33: Uprising material 34 : Embankment material PL: Flat steel plate 35: Anchor material 4: Downstream inclined body 40, 40 ′: Protection panel 40 a, 40 a ′: Hook 41: Support angle 42: Vertical connection material 43: Paci (left and right connection material)
44: Anchor material 5: Top end concrete 6: Wire mesh 7: Support bars F1, F2: Foundation leveling concrete F3: Intermediate foundation leveling concrete G: Natural mountain X: Side edge Y of protection panel: Gap space

Claims (5)

A method for constructing a slope structure in which a plurality of protective panels are arranged side by side to form a slope, and a structure having a slope is constructed by filling a filler in the protective panel forming the slope,
A wire mesh cutting step of cutting a wire mesh in accordance with a gap space formed on the outer side of the slope between the side edge of each step of the protection panel arranged side by side and the ground where the slope structure is installed; A wire mesh standing step for standing the cut wire mesh in a direction substantially perpendicular to the slope at the side end, and a slope external filling step for filling an external filler on the outside of the slope to the standing wire mesh, A method for constructing a slope structure characterized by comprising: The method for constructing a slope structure according to claim 1, wherein, in the slope external filling step, the same filler as the filler filled in the protective panel is filled outside the slope as the external filler. . 2. An intermediate foundation leveling concrete placing step for placing foundation leveling concrete as a foundation on which the protective panel is installed on the external filler filled in the slope outside filling step. Or the construction method of the slope structure of 2. The method for constructing a slope structure according to any one of claims 1 to 3, wherein a steel panel bent to enhance bending rigidity is used as the protective panel. The method for constructing a slope structure according to any one of claims 1 to 4, wherein a soil cement obtained by mixing solidification material with earth and sand is used as the filler and / or the external filler.

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