JP5657985B2 - Fall protection fence, retaining structure, and construction method of retaining structure - Google Patents

Description

  The present invention relates to a fall protection fence, a earth retaining structure including the fall protection fence, and a method for constructing the earth retaining structure.

  Earth retaining structures are installed to prevent landslides or sediment runoff on slopes in mountainous areas, or to revet a river. Such a retaining structure may be stacked high depending on the installation location, and the slope may be steep. If the earth retaining structure becomes high and the slope becomes steep, the construction work becomes dangerous, so it is necessary to ensure the safety of the worker.

  Several techniques have been proposed so far to ensure the safety of workers when constructing earth retaining structures. For example, Patent Document 1 discloses one of them. That is, Patent Document 1 includes a plurality of support rods installed in parallel on the shoulder side of a sloped embankment that is sequentially layered and handrails installed between the support rods. A locking part that protrudes from the slope of the inclined embankment is formed at the tip of the anchor body that is driven and fixed to each embankment surface, and a locking part that can be locked to the locking part is formed on the support rod. The fall prevention fence characterized by this is disclosed.

JP-A-9-170235

  However, in the technique disclosed in Patent Document 1, it is necessary to install an anchor body, which requires extra costs to produce the anchor body, and requires extra effort to install the anchor body. Since the anchor body remains installed in the retaining structure as it is even after the retaining structure is completed, there are problems such as undesirable landscape.

  Then, this invention makes it a subject to provide the fall protection fence excellent in economical efficiency, workability | operativity, and landscape property, the earth retaining structure provided with this fall protection fence, and the construction method of this earth retaining structure. To do.

  The present invention will be described below.

  A first aspect of the present invention includes a banking structure and a wall-shaped member installed on the slope side of the banking structure, and the wall-shaped member is installed in a substantially horizontal manner along the slope. A fall protection fence used in a earth retaining structure having members, which is attached to a plurality of bundle pillars, handrails built between the plurality of bundle pillars, and can be locked to a reinforcing member And a falling protection fence.

  In the present invention, the “banking structure” means a structure having a layer formed by compacting a banking material. The “banking material” is not particularly limited as long as it is used as banking, and locally generated soil such as sand and clay can be used.

  A second aspect of the present invention includes a banking structure, a wall surface material installed on a slope side of the banking structure, and a fall protection fence locked to the wall surface material, and the wall surface material is a slope surface. The fall protection fence has a plurality of bundle pillars, a handrail laid between the plurality of bundle pillars, and is attached to the bundle pillar and is reinforced. An earth retaining structure including a locking member that can be locked to the member.

  A third aspect of the present invention includes a banking structure, a wall surface material installed on a slope side of the banking structure, and a fall protection fence locked to the wall surface material. A method for constructing an earth retaining structure having a bar-shaped reinforcing member installed substantially horizontally along a surface, the embankment structure producing step for producing an embankment structure using a wall material and an embankment material, and a wall surface A fall protection fence locking process for locking the fall protection fence to the material, and the fall protection fence includes a plurality of bundle pillars, a handrail constructed between the plurality of bundle pillars, and a bundle pillar. And a retaining member that can be locked to the reinforcing member, and the falling protection fence locking step is a step of locking the falling protection fence to the reinforcing member by the locking member. Is the method.

  ADVANTAGE OF THE INVENTION According to this invention, the fall protection fence excellent in economical efficiency, workability | operativity, and landscape property, the earth retaining structure provided with this fall protection fence, and the construction method of this earth retaining structure can be provided.

It is a figure which shows roughly the cross section of the earth retaining structure provided with the fall protection fence of this invention concerning one embodiment. It is the figure which looked at a part of the earth retaining structure shown in FIG. 1 from the slope side. It is a figure which shows roughly the clamp with a hook which is an example of a locking member.

  The above-described operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these embodiments.

<Fall protection fence>
Drawing 1 is a figure showing roughly the section of the direction perpendicular to the longitudinal direction of earth retaining structure 100 provided with fall protection fence 10 of the present invention concerning one embodiment. Note that the longitudinal direction means a direction parallel to the horizontal plane and the slope of the retaining structure. In FIG. 1 and other figures described below, reference numerals may be omitted in order to prevent the figure from becoming complicated. FIG. 2 is a view of a part of the earth retaining structure 100 as seen from the slope side.

  The fall protection fence 10 shown in FIG. 1 is used in the earth retaining structure 100. The earth retaining structure 100 includes a banking structure 30, and a wall surface material 40 is installed on the slope side of the banking structure 30. Moreover, the wall surface material 40 is provided with the rod-shaped reinforcement member 41 installed substantially horizontally along the slope. A more detailed description of the earth retaining structure 100 will be given later.

  The fall protection fence 10 includes a plurality of bundle pillars 11, a handrail 12 laid between the plurality of bundle pillars 11, a locking member 15 that is attached to the bundle pillar 11 and can be locked to the reinforcing member 41. It has.

  The locking member 15 includes a locking portion that can be locked to the reinforcing member 41 and a fixing portion that can fix the bundle pillar 11. As such a locking member 15, for example, an existing clamp with a hook as shown in FIG. 3 can be used.

  FIG. 3A is a top view schematically showing the hooked clamp 15. FIG. 3B is a view of the hooked clamp 15 seen from the direction of the arrow x shown in FIG. In FIG. 3, the locations where the reinforcing members 41 and the bundle pillars 11 are arranged when using the hooked clamp 15 are indicated by broken lines.

  The clamp 15 with a hook shown in FIG. 3 includes a locking portion (hook) 15 a that can be locked to the reinforcing member 41 and a fixing portion 15 b that can fix the bundle pillar 11. The locking member 15 can be locked to the reinforcing member 41 by hooking the hook 15 a to the reinforcing member 41. The fixed portion 15b includes a first arm 15c and a second arm 15d that are rotatably connected by a shaft 15e, a bolt 15f, and a nut 15g that is screwed to the bolt 15f. The bolt 15f is provided penetrating through an end portion of the first arm 15c opposite to the side where the shaft 15e is provided and an end portion of the second arm 15d opposite to the side where the shaft 15e is provided. Yes. The interval y can be adjusted by tightening or loosening the nut 15g screwed to the bolt 15f, and the bundle column 11 is sandwiched between the first arm 15c and the second arm 15d. 11 can be fixed.

  The bundle pillar 11 is locked by a locking member 15 so that it does not come off the reinforcing member 41 even if a predetermined load is applied to the bundle pillar 11 or the handrail 12. The positions of the bundle pillar 11 and the handrail 12 are fixed to each other by a fixing member 13 so that the handrail 12 and the bundle pillar 11 do not come off even when a predetermined load is applied to the handrail 12. As the fixing member 13, for example, a member in which two annular parts that can fix the columnar bodies are integrated and the directions of the columnar bodies that can be fixed by the two annular parts are orthogonal to each other is used. Can do. The bundle pillar 11, the handrail 12, the fixing member 13, and the locking member 15 are not particularly limited as long as they have a strength that can withstand a predetermined load applied to the bundle pillar 11 or the handrail 12. Here, the “predetermined load” is appropriately set according to the installation location and application of the fall protection fence 10, and the specific value is not particularly limited. As the bundle pillar 11 and the handrail 12, for example, a steel pipe or the like can be used.

  Since the fall protection fence 10 can use an existing member as the locking member 15 as described above, it is not necessary to separately prepare a special member for the installation of the fall protection fence 10, and the cost is excellent. Moreover, the engagement fall guard fence 10 is easy to attach to and remove from the wall surface material 40 by using the locking member 15, and is excellent in workability. Furthermore, since the fall protection fence 10 can be removed without leaving any members on the embankment structure 30 after the fabrication of the embankment structure 30 is completed, the fall protection fence 10 is also excellent in landscape.

<Retaining structure>
The earth retaining structure of the present invention includes the fall protection fence of the present invention. The earth retaining structure 100 of the present invention will be described below by taking the earth retaining structure 100 shown in FIGS. 1 and 2 as an example.

  As shown in FIG. 1, the earth retaining structure 100 includes a banking structure 30 having a wall surface material 40 and a fall protection fence 10 that is locked to the wall surface material 40.

(Fill structure 30)
The banking structure 30 is a structure formed by stacking a plurality of layers 31 formed by compacting a banking material 32. The embankment material 32 is not particularly limited as long as it is used as a embankment material, and locally generated soil such as sand and clay can be used.

  The wall surface material 40 is a member constituting the slope of the embankment structure 30. The entire slope of the embankment structure 30 can be configured by arranging a plurality of wall materials 40 in the vertical and horizontal directions (vertical direction and back / front direction in FIG. 1). As a specific example of the wall surface material 40, a steel mesh-like member having a substantially L-shaped cross section perpendicular to the longitudinal direction at the time of installation can be given. As what is marketed by such a steel wall surface material, the EXS panel, EXC panel, EG panel, etc. by Mitsubishi Resin Co., Ltd. can be mentioned, for example. The wall materials 40 adjacent to each other in the vertical and horizontal directions are preferably fixed to each other. The method for fixing the adjacent wall materials 40 is not particularly limited, and a conventional method can be used.

  Further, the wall surface material 40 includes a rod-shaped reinforcing member 41 that is installed substantially horizontally along the slope of the embankment structure 30. The reinforcing member 41 is a member provided to increase the rigidity of the wall surface material 40. By providing the reinforcing member 41, deformation of the wall surface material 40 can be suppressed when the embankment material 32 is compacted or when a load is applied after the embankment structure 30 is produced.

  The reinforcing member 41 can be fixed to the wall surface material 40 using, for example, an oblique tie material 45 or the like. More specifically, first, a plurality of convex portions 46 through which the rod-shaped body can be passed are provided in the longitudinal direction at the bottom of the wall surface material 40, and the connecting rod 47 is passed through the convex portions 46. Then, the bottom portion of the wall surface material 40 and the oblique tie material 45 are connected by hooking one end of the oblique tie material 45 on the connecting rod 47. On the other hand, the other end of the slant tie member 45 protrudes to the outside of the wall material 40 configured in a mesh shape, and the reinforcing member 41 disposed in the longitudinal direction outside the wall member 40 is hooked on the other end of the slant tie member 45. Thus, the reinforcing member 41 can be fixed to the wall surface material 40.

  Thus, the embankment structure 30 is configured with a slope using the wall surface material 40 provided with the reinforcing member 41, and other configurations are not particularly limited, and are configured similarly to the conventional embankment structure. be able to.

  As shown in FIG. 1, a greening mat 44 is preferably provided inside the wall surface material 40. By setting it as this form, it can prevent that the embankment material 32 leaks from the wall surface material 40 side.

  Moreover, it is preferable that the reinforcing material 33 is embed | buried between the layers 31 comprised by compacting the embankment material 32. FIG. As the reinforcing material 33, the thing similar to what is used for the conventional embankment structure can be used. For example, a tencer manufactured by Mitsubishi Plastics, Inc. can be used.

  The reinforcing member 33 has one end connected to the wall surface member 40 and the other end fixed to the upper surface of the ground 50 or the lower layer 31. A method for fixing the reinforcing member 33 to the upper surface of the ground 50 or the lower layer 31 is not particularly limited, and a method similar to the conventional method can be used. For example, it can be fixed with a pile or the like. The connection method between the wall surface material 40 and the reinforcing material 33 is not particularly limited, and a conventional method can be used.

  1 and 2 exemplify a form in which the embankment structure 30 includes three layers 31a, 31b, and 31c. However, the present invention is not limited to such a form, and what is the embankment structure? It may be composed of layers. Moreover, the structure of the top surface 34 of a banking structure is not specifically limited, It can be set as the structure similar to the conventional banking structure.

<Construction method of earth retaining structure>
The construction method of the earth retaining structure of the present invention includes an embankment structure producing process for producing an embankment structure and a fall protection fence locking process for installing the fall protection fence of the present invention. With reference to FIG. 1, the construction method of the retaining structure of the present invention will be described by taking the retaining structure 100 as an example.

  First, the embankment structure production process for producing the embankment structure 30 will be described. When producing the embankment structure 30, the lowest layer 31a of the embankment structure 30 is produced first. Specifically, the wall surface material 40 and the reinforcing material 33 are installed on the ground 50 whose surface is leveled. At this time, the wall surface material 40 and the reinforcing material 33 are connected. Thereafter, a layer 31 a having a predetermined height is formed on the reinforcing member 33 by compacting the embankment material 32.

  Next, the wall surface material 40 and the reinforcing material 33 are installed on the layer 31a produced in the previous step. At this time, the wall surface material 40 and the reinforcing material 33 are connected. Moreover, the wall surface materials 40 piled up and down are also connected. Thereafter, a layer 31 b having a predetermined height is formed on the reinforcing material 33 by compacting the embankment material 32.

  Thus, the embankment structure 30 can be produced by repeating the process of producing the layer 31 having a predetermined height. In addition, the formation method of the upper surface (top | upper surface) of the layer 31c which is the uppermost layer of the embankment structure 30 is not specifically limited, It can be made the same with the conventional embankment structure.

  The fall protection fence locking step is performed in parallel with the embankment structure manufacturing step. That is, in the process of producing the embankment structure 30 as described above, the fall protection fence 10 is locked to the wall surface material 40 when the embankment structure 30 being produced is at a predetermined height. Here, the “predetermined height” is not specifically limited, and means a height at which a fall protection fence is required.

  After the fall protection fence 10 is locked to the wall surface material 40, the banking structure 30 is further increased by continuing to produce the banking structure 30, and the locked fall protection fence 10 cannot fully protect the operator. In such a case, the fall protection fence 10 is re-installed on the upper wall material 40. For example, the fall protection fence 10 can be re-installed on the upper wall surface member 40 simply by pulling up the fall protection fence 10 and locking the locking member 15 to one or more upper reinforcing members 41. The operation of re-installing the fall protection fence 10 is simple.

  Thus, according to the present invention, the earth retaining structure 100 can be safely constructed by producing the embankment structure 30 while re-installing the fall protection fence 10.

  In accordance with “Technical Standards for Fall Prevention Equipment” established by the Temporary Industrial Association, the strength demonstration test of the fall protection fence of the present invention was performed as described below.

  First, an embankment structure 30 having a slope of a slope of 1: 0.3 was produced. An EXC panel manufactured by Mitsubishi Plastics, Inc. was used for the wall surface material 40. Thereafter, a fall protection fence 10 using a single pipe having a diameter of 50 mm as the bundle pillar 11 and the handrail 12 and using a clamp with a hook as the locking member 15 (made by Heiwa Giken Co., Ltd., curing clamp “F-HCR”), The reinforcing member 41 was attached. At this time, two locking members 15 were provided in one bundle pillar 11, and the installation interval of the two locking members 15 was 626 mm.

  A load meter is attached to the fall protection fence 10 installed as described above, and an intermediate portion (midpoint of the span) between the bundle pillar 11 of the handrail 12 and the bundle pillar 11 adjacent to the bundle pillar 11 or the handrail 12 A load was applied to a portion where the bundle pillar 11 was fixed (a bundle pillar and a handrail node). The loads thus applied are shown in Table 1 as “actual measurement values”.

  In Table 1, the “work position” is a place where a load is applied as described above. The “type” and “load value considering the safety factor” are those described in “Technical Standards for Fall Prevention Equipment” established by the Temporary Industrial Association. The safety factor is 1.8 or more for the first type and 2.3 or more for the second type.

  As shown in Table 1, the fall guard fence of the present invention is safe at the midpoint of the span and at the nodes of the bundle pillars and handrails according to the “Technical Standard for Fall Prevention Equipment” established by the Temporary Industrial Association. The strength exceeded the load value considering the rate.

  The present invention has been described above with reference to embodiments that are presently practical and preferred. However, the present invention is not limited to the embodiments disclosed in the specification of the present application, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification. It is to be understood that the fall protection fence, the earth retaining structure, and the method of constructing the fall protection fence with such changes are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Fall protection fence 11 Bunch pillar 12 Handrail 13 Fixing member 15 Locking member 15a Locking part 15b Fixing part 30 Embankment structure 31 Layer 32 Filling material 33 Reinforcement material 40 Wall material 41 Reinforcement member 50 Ground 100 Earth retaining structure

Claims (6)

And embankment structure, and a wall material that is placed on the slope side of the該盛soil structure, have a reinforcing bar-shaped member disposed substantially horizontally along the wall surface member is the slope face, reinforcing member there a tumble safety barrier for use in earth retaining structures that are anchored to one end of the diagonal tie member connected to the bottom of the wall member,
A plurality of bundle pillars, a handrail laid between the plurality of bundle pillars, and a locking member attached to the bundle pillar and latchable to the reinforcing member,
The fall protection fence, wherein the locking member is attached to two locations of the one bundle pillar in accordance with the interval of the reinforcing member. A banking structure, a wall material installed on the slope side of the banking structure, and a fall protection fence locked to the wall material,
The wall member has a rod-shaped reinforcing member installed substantially horizontally along the slope , and the reinforcing member is locked to one end of a slant tie member connected to the bottom of the wall member;
The fall protection fence includes a plurality of bundle pillars, a handrail laid between the plurality of bundle pillars, and a locking member attached to the bundle pillar and latchable to the reinforcing member. The earth retaining structure is characterized in that the locking members are attached to two portions of the one bundle pillar in accordance with the interval between the reinforcing members. A banking structure, a wall surface material installed on the slope side of the banking structure, and a fall protection fence locked to the wall material, the wall material installed substantially horizontally along the slope surface have a reinforcing rod-like member which is directed to a construction method of earth retaining structures reinforcing member is engaged at one end of the diagonal tie member connected to the bottom of the wall member,
The embankment structure production process for producing the embankment structure using the wall surface material and the embankment material,
A fall protection fence locking step for locking the fall protection fence to the wall surface material,
The fall protection fence includes a plurality of bundle pillars, a handrail laid between the plurality of bundle pillars, and a locking member attached to the bundle pillar and latchable to the reinforcing member. The locking member is attached to two locations of the one bundle pillar in accordance with the interval between the reinforcing members,
The method for constructing a retaining structure, wherein the fall protection fence locking step is a step of locking the fall protection fence to the reinforcing member by the locking member. The fall protection fence according to claim 1, wherein the locking member is a clamp with a hook, the bundle column is attached to a clamp portion, and the hook portion can be locked to the reinforcing member. The earth retaining structure according to claim 2, wherein the locking member is a clamp with a hook, the bundle column is attached to a clamp portion, and the hook portion can be locked to the reinforcing member. The locking member is a clamp with a hook, the bundle column is attached to a clamp part, and the hook part can be locked to the reinforcing member. In the fall protection fence locking step, the hook part The construction method of the earth retaining structure according to claim 3, wherein the retaining member is locked to the reinforcing member.

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