JP6463197B2 - Construction method of slope structure - Google Patents

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.

  For example, Patent Document 2 discloses a sabo dam construction method for constructing a sabo dam by covering an upstream side surface and a downstream side surface of a dam body with an external protection material, and a foundation for supporting the lower end portion of the external protection material. A step of forming a leveled concrete, a step of assembling the external protective material on the basic leveled concrete, a step of forming a space between the external protective material and a natural ground, and the external protective material. And a method for constructing a sabo dam provided with an inner member (soil cement) interposed therebetween (claim 7 of patent document 2 and paragraph [0040] of the specification). [0049] See FIGS. 7 and 9 of the drawings).

  However, in the conventional sabo dam construction method such as the sabo dam construction method described in Patent Document 2, when the protective concrete 28 is placed on the top of the dam body 12, the protective concrete 28 is not yet placed. A pillar made of a single pipe or the like was driven into the top of the dam to install a handrail and a fence to prevent it from falling, and a safety belt was hung on the installed handrail and the fence, and a formwork for the protective concrete 28 was built. . For this reason, pulling out or cutting the handrails and fence posts after placing the concrete, and the return work such as filling the holes with the posts again with concrete etc. has occurred, and there was a problem that work efficiency was poor .

  Further, when the formwork for the protective concrete 28 is built, there is a problem that the work cannot be performed from the outside of the surface where the concrete is placed, and the work efficiency of the work for assembling the formwork is poor. Although it was not impossible to build a conventional framework scaffold or single-pipe scaffold on an external protective material that is a slope, the scaffold is efficiently installed in a short time on the external protective material that is built sequentially. It was difficult to do and was hardly implemented.

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

  Therefore, the present invention has been devised in view of the above-described problems, and an object of the present invention is to provide a method for constructing a slope structure capable of constructing a slope structure efficiently in a short time. There is to do.

  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, comprising: a support bracket fixing step for fixing a plurality of support brackets in the vicinity of upper ends of the plurality of protection panels arranged side by side in the lateral direction; and an upper end of the protection panel A plurality of single-pipe pipes connected to each other and spanned between the support brackets and fixed, and a plurality of scaffold brackets are hung on the connected single-pipe pipes. A bracket scaffolding temporary step of laying a scaffolding scaffolding over a scaffolding plate, and a formwork installation for installing a formwork extending upward along the upper end of the protective panel using the bracket scaffolding And extent, characterized in that it comprises a crest concreting step of pouring concrete into the mold in order to build a crest concrete the crest to protect against erosion of rainwater of the filler.

  In the construction method of the slope structure according to the second invention, in the first invention, in the support metal fitting fixing step, a levee material made of a steel material covering the upper ends of the plurality of protection panels and having a flat surface on the upper surface is installed. The support metal fitting is fixed through the flat steel plate projecting downward from the bank material and the protective panel.

  A construction method of a slope structure according to a third invention is characterized in that, in the first invention or the second invention, in the bracket scaffolding temporary installation step, a handrail for preventing the fall is installed on the tip side of the scaffold bracket.

  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.

  In the construction method of the slope structure according to the fifth invention, in any one of the first to fourth inventions, a soil cement obtained by mixing a solidified material with earth and sand is used as the filler. And

  According to the first to fifth inventions, the bracket scaffold can be efficiently assembled in a short time along the upper end of the protective panel that forms the slope, and the bracket scaffold is used as a work space for the ceiling concrete. The formwork can be built along the protective panel from the outside of the slope. For this reason, it is possible to perform the work of placing the top end concrete formwork, placing concrete, removing the formwork, and removing temporary materials such as scaffolds and handrails very efficiently. Therefore, the work time of the whole construction work of a slope structure can be shortened, and the installation cost of a slope structure can be reduced significantly. Further, the bracket scaffold can be used as a destination for tying up the passage and the curing sheet when placing the top concrete, and the convenience during placing and curing the top concrete is improved.

  In particular, according to the second invention, since the embankment material having a flat surface is installed on the upper surface, the work of installing the ceiling concrete after that can be performed more efficiently and smoothly. Work can be done in a short time. For this reason, the installation cost of the slope structure can be further reduced.

  In particular, according to the third invention, since the handrail for preventing the fall is installed, not only the risk of falling during the work is reduced, but also the tip side of the scaffold bracket, that is, a ceiling different from the conventional handrail. Since there is a handrail for preventing the fall on the side other than the side where the end concrete formwork is installed, it does not get in the way when the formwork is installed, and the formwork installation work can be performed efficiently.

  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, it is possible to reduce costs such as a transportation cost for transporting the earth and sand generated by excavation and a disposal cost of the earth and sand. Can do. 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 a vertical sectional view which shows the bracket scaffold used for the construction method of the slope structure which concerns on embodiment of this invention. FIG. 4 is a vertical sectional view mainly showing a support structure of the bracket scaffold same as above by enlarging a part of the upper part of the upstream slope of the slope structure of FIG. 3. It is an elevation view which expands and shows the upper part of an upstream slope same as the above. It is a top view which expands and shows the upper part of an upstream slope same as the above. It is a side view which shows the scaffold bracket of FIG. It is a side view which shows the handrail of FIG. 11 with which the front-end | tip of a scaffold bracket same as the above is mounted | worn. It is a flowchart of the construction method of the slope structure which concerns on embodiment of this invention.

  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>
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. This concrete panel is a rectangular panel (width 1495 × height 1020) made of reinforced concrete having a thickness of 150 mm in elevation, and hooks 40a for holding anchor materials 44 described later 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).

[Bracket scaffold]
Next, the bracket scaffold used for the construction method of the slope structure which concerns on embodiment of this invention using FIGS. 11-16 is demonstrated.

  As shown in FIG. 11, the bracket scaffold 7 according to the embodiment includes a plurality of support fittings 70 that support the bracket scaffold 7, and one single tube that is spanned between the plurality of support fittings 70 and clamped. A pipe 71, a plurality of scaffold brackets 72 suspended from the single pipe 71 at a predetermined interval, a scaffold plate 73 spanned between the plurality of scaffold brackets 72, and a suspension bracket 72. It comprises a plurality of handrail columns 74 provided, and two upper and lower handrail pipes 75 spanned between the plurality of handrail columns 74.

(Support bracket)
As shown in FIGS. 12 to 14, the support fitting 70 is an angle piece of about 100 mm in length made of angle steel (L-125 × 125 × 12) made of general structural rolled steel (SS400) and around the bolt In order to reinforce, the flat steel plate PL suspended downward from the inside of the top surface of the levee material 34 is used as a back plate, and one side (one outer surface) of the angle is slightly spaced from the upper end of the protective panel 30. Bolted into position.

  Further, a fixed clamp 70a is fixed to the upper surface near the tip of the other side of the angle of the support fitting 70, and a single pipe 71 described later is clamped and fixed by the fixed clamp 70a.

(Single pipe)
The single pipe 71 is a general single pipe made of a general structural carbon steel pipe (STK500) having a diameter of 48.6 mm and a thickness of 2.4 mm, and a plurality of single pipes 71 having a length of about 1.0 m to 6.0 m. Are joined by a joint or the like in the longitudinal direction to form one single pipe along the bank material 34.

(Scaffold bracket)
As shown in FIG. 15, the scaffold bracket 72 is a member in which angle steel (L-65 × 65 × 6) made of general structural rolled steel (SS400) is combined in a triangular shape, and a horizontal member 72 a extending horizontally. And a vertical member 72b that hangs downward from the base end side of the horizontal member 72a, and an oblique member 72c that connects the horizontal member 72a and the vertical member 72b. The horizontal member 72a, the vertical member 72b, and the diagonal member 72c are connected to each other by rivets to form a base of the bracket.

  A U-shaped hook 72d corresponding to a diameter of 48.6 mm is fixed to the upper part of the vertical member 72b so as to be hooked to the single pipe 71, and the lower part of the vertical member 72b is in contact with the protective panel 30 and is a scaffold. A strut member 72e for preventing the rotation of the bracket 72 is provided so as to protrude in the horizontal direction.

  In addition, on the top surface of the front end of the horizontal member 72a, a column connecting pin 72f for fitting the handrail column 74 is suspended upward. A J-shaped locking pin 72g that can be pulled out and retracted in the horizontal direction by a spring is attached to the column connecting pin 72f. The rail pin 72g is locked to the lower portion of the railing column 74 by locking the locking pin 72g. 74 is not inadvertently dropped.

(Scaffolding board)
The scaffold plate 73 is a general lightweight long scaffold plate made of a plated steel plate having a width of 240 mm × thickness of about 40 mm and a length of 2 m to 4 m. The scaffold plate 73 is hung on the single pipe 71 with an interval of about 2 m. It is bridged between a plurality of scaffold brackets 72 and used as a scaffold (see FIG. 11).

(Handrail support)
As shown in FIG. 16, the handrail support 74 is a general handrail support made of a general structural carbon steel pipe (STK500) having a diameter of 2.4 mm and a diameter of 42.7 mm. The handrail support 74 is fitted to the aforementioned support connecting pin 72f. used. A universal clamp 74a is riveted to the handrail post 74 near the upper end and near the center, and a handrail pipe 75 having two upper and lower stages is attached.

(Handrail pipe)
The handrail pipe 75 is a general single-pipe pipe made of a general structural carbon steel pipe (STK500) having a diameter of 48.6 mm, which is the same as the single-pipe pipe 71, and is a worker who works on the scaffold plate 73. Has a function as a fence for preventing fall that prevents the fall from the bracket scaffold 7.

[Slope structure construction method]
Next, the construction method of the slope structure according to the embodiment of the present invention will be described with reference to FIG. The case where the above-mentioned sabo dam 1 is constructed as a slope structure will be described.

(1) Foundation leveling concrete placement process First, the position of the upstream slope body 3 and the downstream slope body 4 is determined by surveying, etc., a temporary frame is installed, and 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 the upstream side slope body 3 and the downstream side slope body 4, respectively. Thereafter, the temporary frame is removed.

(2) 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 attached to the upstream slope body. 3 and the first stage of the downstream inclined body 4 are assembled (see 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.

(3) Filling material filling process Next, with 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 in a separate yard is carried in by a dump truck, Fill the filler 2 up to the height of the anchors 35 and 44 and spread it with a bulldozer or backhoe.

(4) Rolling step Next, the filler 2 is crushed and compacted by running with a vibrating roller or a bulldozer on the spread filler 2. Of course, you may roll with a rolling machine, a ramma, etc.

(5) 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.

  Next, the upstream slope surface 3 and the downstream slope body 4 in the second and third steps, the protective panel assembly process → filler filling process → rolling process → anchor material installation process are repeated, and the upstream slope After assembling the uppermost protective panels 30 and 40 of the body 3 and the downstream slope body 4, the filling material filling step → the rolling step is performed, and after the curing period during which the filling material 2 is cured, the process proceeds to the next step. Of course, it is possible to omit the curing period in consideration of the work time (period) required after the next process.

(6) Support metal fitting fixing process Next, the some support metal fitting 70 is fixed at intervals in the horizontal direction in the vicinity of the upper end of the uppermost protection panel 30 arranged side by side. In the support fixture fixing step of the construction method of the slope structure according to the present embodiment, the above-described flat steel plate PL is used as a back plate to reinforce the periphery of the bolt, and one side of the angle of the support fixture 70 is set to the upper end of the protective panel 30. The bolts are fixed by bolting with M16 bolts at a position slightly spaced from each other.

  Note that the support metal fitting 70 may be fixed to the embankment material 34 without being bolted to the protective panel 30 or the flat steel plate PL. Of course, not only the upstream side slope body 3 but also the downstream side slope body 4 has a similar support fitting hooked on the upper end of the protective panel 40, or a female screw corresponding to a bolt such as M16 is embedded in the protective panel 40 in advance with an insert. Or, a through hole for inserting a bolt may be provided, and a support metal of a different form from the support metal 70 may be fixed to the protective panel 40.

(7) Single pipe pipe installation step Next, a plurality of single pipe pipes 71 are connected together using a common single pipe pipe joint along the upper end of the protective panel 30 (40), and a plurality of support brackets are connected. It spans between 70 and it fixes using the fixed clamp 70a.

(8) Bracket Scaffold Temporary Step Next, the U-shaped hooks 72d are hooked on the single pipe 71 connected in the previous step, and a plurality of scaffold brackets 72 are installed at predetermined intervals (about 2 m) in the lateral direction. . Then, the scaffold plate 73 is bridged between the scaffold brackets 72. Of course, two scaffolding plates 73 may be installed side by side.

  Thereafter, a handrail support 74 is fitted to a support connecting pin 72f provided on the distal end side of the scaffold bracket 72, and a handrail pipe 75 extending in two upper and lower stages is fixed to a universal clamp 74a of the handrail support 74 to prevent the fall. Install the handrail.

(9) Formwork installation process Next, the formwork of the top concrete 5 extended upwards along the upper end of the protection panel 30 (40) is installed using the bracket scaffold 7 installed in the previous process. 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.

(10) Ceiling concrete placing step Next, the concrete is placed in the mold set in the previous step to construct the ceiling concrete 5 that protects the ceiling of the filler 2 from erosion of rainwater.

(11) Temporary Material Removal Step Next, the temporary material such as the top end concrete 5 and the bracket scaffold 7 are removed to complete the construction of the sabo dam 1 which is a slope structure.

  According to the construction method of the slope structure according to the embodiment of the present invention described above, the bracket scaffold 7 can be easily and quickly installed outside the upstream slope body 3 (downstream slope body 4). The formwork of the top concrete 5 can be built along the protective panel 30 (40) from the outside of the slope using the bracket scaffold 7.

  In addition, the bracket scaffold 7 can be used as a piping route for pump cars, a passage for workers, and a work space when placing concrete on the top end concrete 5 and can be leveled without riding on the placed concrete. The work of leveling the top edge of the top edge concrete 5 is also facilitated. Moreover, the bracket scaffold 7 can be used as a point to which the curing sheet after placing the top concrete 5 is bound, and the convenience during placing and curing the top concrete 5 is improved. Furthermore, it can be used as a passage or a work space when the mold is disassembled and carried out, and the work time can be shortened.

  Therefore, according to the construction method of the slope structure according to the embodiment of the present invention, the work of installing the formwork of the top concrete 5, placing the concrete, removing the formwork, and removing the temporary materials for the scaffolding and the handrail Can be performed very efficiently. For this reason, the work time of the construction work of the sabo dam 1 can be shortened, and the installation cost of the sabo dam 1 can be reduced significantly.

  Moreover, according to the construction method of the slope structure according to the embodiment of the present invention, since the handrail for preventing the fall is installed as the bracket scaffold 7, not only the risk of falling during the work is reduced, but also the scaffold bracket 72. Since there is a handrail for fall prevention on the tip side of the roof, that is, the side where the formwork of the top concrete 5 is not installed, it does not get in the way when installing the formwork, and the formwork installation work is more efficient It can be carried out.

  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 another dam and a retaining wall. In short, the present invention can be applied to a slope structure having a slope on at least one surface.

1: Sabo dam (slope structure)
DESCRIPTION OF SYMBOLS 10: Bank body 11: Overflow part 2: 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 40a, 40a': Hook 41: Support angle 42: Up and down connecting material 43: Passy (left and right connecting material)
44: Anchor material 5: Top concrete 7: Bracket scaffold 70: Support metal fitting 70a: Fixing clamp 71: Single pipe 72: Scaffold bracket 72d: U-shaped hook 72e: Placing bar 72f: Strut connecting pin 72g: Locking pin 73 : Scaffold plate 74: Handrail post 74a: Swivel clamp 75: Handrail pipes F1 and F2: Foundation leveling concrete

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 support bracket fixing step of fixing a plurality of support brackets in the vicinity of the upper ends of the plurality of protection panels arranged side by side, and a plurality of single pipes are connected along the upper ends of the protection panels. A single pipe pipe laying step that spans and fixes between the support brackets, a plurality of scaffold brackets are hooked on the connected single pipe pipes, and a scaffold plate is temporarily built by spanning a scaffold plate between the scaffold brackets. A bracket scaffolding temporary process, a mold installation process for installing a mold extending upward along the upper end of the protective panel using the bracket scaffold, and a ceiling for protecting the top edge of the filler from rainwater erosion. A method for constructing a slope structure, comprising: a top concrete placing step for placing concrete in the formwork to construct edge concrete. In the support fixture fixing step, a flat steel plate covering the upper ends of a plurality of the protection panels and having a flat surface on the upper surface is installed, and a flat steel plate projecting downward from the bank material and the protection panel The method for constructing a slope structure according to claim 1, wherein the support metal fitting is fixed through the wall. The method for constructing a slope structure according to claim 1 or 2, wherein, in the bracket scaffold temporary step, a handrail for fall prevention is installed on a distal end side of the scaffold bracket. 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 in which a solidifying material is mixed with earth and sand is used as the filler.

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