JP2011214222A - Lower earth retaining wall structure of temporary fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower earth retaining wall structure of a temporary fence capable of preventing the sediment in a site from extruding to the outside of the site through the gap between the lower end edge of the temporary fence and a ground surface by a simple configuration.SOLUTION: A fence post 13 is supported by a post pile 15 driven into a ground surface 20 on the rear side of the temporary fence 11 to prevent the temporary fence 11 from falling. The lower earth retaining wall structure 10 includes a sheet sheath member 16 which is installed on the lower rear side of the sheet fence member 12 parallel to each other while being supported on the post piles 15 at both ends and the insertion hole 16a of which is opened downward and an earth retaining plate member 17 loosely fitted to the sheet sheath member 16 so as to be vertically moved. The earth retaining plate member 17 covers the gap 21 between the lower end of the sheet fence member 12 and the ground surface 20 by coming into contact with the ground surface 20 at the lower end edge 17a thereof by its own weight while the upper part 17b thereof is inserted into the sheet sheath member 16 from the insertion hole 16a.

Description

  The present invention relates to a lower earth retaining wall structure of a temporary fence, and in particular, a temporary installation comprising a plurality of fence posts that are erected from a ground surface via a jack base, and a planar fence member that is supported and attached to the fence posts. The present invention relates to a lower earth retaining wall structure of a temporary fence used by being attached to a fence.

  At civil engineering and building construction sites and various outdoor event venues, etc., around construction sites and event venues for the purpose of preventing accidents during construction and holding, crime prevention, blindfolding, etc. In many cases, the assembly type temporary fence is provided.

  The temporary fence is assembled by attaching a planar fence member supported by a plurality of fence posts that are erected from the ground surface via a jack base having a male threaded portion for enabling height adjustment. It is general (see, for example, Patent Document 1 and Patent Document 2). In addition, these temporary fences are designed to support the fence posts directly or via a conservative pillar or the like on the pillar pile driven into the ground on the back side of the temporary fences in order to prevent the body from falling forward and backward. Yes.

JP 2002-129529 A Japanese Patent Laid-Open No. 2005-139689

  In the above-mentioned temporary fence, since the fence column is erected from the ground surface via the jack base, a gap is maintained between the lower edge of the planar fence member attached to the fence column and the ground surface. Will be. On the other hand, various civil works such as excavation, embankment, and backfilling are carried out on the site, for example, at the construction site of civil engineering and construction work. However, in order to use the site as widely as possible, it is generated by excavation, for example. When temporarily placing the earth and sand on the peripheral edge along the temporary fence in the site, the temporarily placed earth and sand is placed on the site via the gap between the lower edge of the surface fence member and the ground surface. There is a risk of protruding outside.

  The present invention effectively prevents the earth and sand in the site surrounded by the temporary fence from protruding outside the site via the space between the lower edge of the planar fence member and the ground surface with a simple configuration. It aims at providing the lower earth retaining wall structure of the temporary fence which can be done.

  The present invention is erected from a ground surface via a jack base, and is attached to each of a plurality of fence posts arranged at a predetermined interval and both ends supported between adjacent fence posts. A temporary fence composed of a planar fence member, wherein the temporary fence is a lower earth retaining wall structure for covering a gap portion between a lower end of the planar fence member and a ground surface, and the fence column includes the temporary fence By supporting the pillar fence driven into the ground surface on the back side of the fence, the temporary fence is prevented from falling, and both ends are supported by the pillar pile, and the planar fence member A planar sheath member that is provided side by side on the lower back side of the housing, and an earth retaining plate member that is loosely fitted to the planar sheath member so as to be slidable up and down. The earth retaining plate member is in a state in which the upper end is inserted into the planar sheath member from the insertion port, and the lower edge of the planar fence member is brought into contact with the ground surface by its own weight. The above-mentioned object is achieved by providing a lower earth retaining wall structure of a temporary fence that covers the space between the two.

  Further, in the lower earth retaining wall structure of the temporary fence according to the present invention, a guide rail member having a rail groove opened to the side extends in the longitudinal direction on the side edge portion of the back surface of the planar sheath member. Between the pair of adjacent planar fence members adjacent to each other, by dropping the gap adjustment plate by locking the side end portions to the pair of guide rail members provided at the respective side edge portions, It is preferable to cover a gap between the pair of adjacent retaining plate members.

  Further, the lower earth retaining wall structure of the temporary fence of the present invention projects from the side edge portion of the planar sheath member to the planar fence member side, and is provided with fixing plate pieces, respectively. It is preferable that both end portions of the planar sheath member are supported and fixed to the pillar pile via a piece.

  According to the lower earth retaining wall structure of the temporary fence of the present invention, the earth and sand in the site surrounded by the temporary fence is passed through the space between the lower edge of the planar fence member and the ground surface with a simple configuration. Can be effectively prevented from protruding outside the site.

It is a front view of the temporary fence in which the lower earth retaining wall structure which concerns on preferable one Embodiment of this invention is provided. It is sectional drawing which abbreviate | omits the planar fence member along AA of FIG. 1 explaining the structure of the lower earth retaining wall structure which concerns on preferable one Embodiment of this invention. FIG. 5 is a schematic cross-sectional view taken along the line BB in FIG. 1 for explaining the configuration of the lower earth retaining wall structure according to a preferred embodiment of the present invention. It is a side view of a planar sheath member and an earth retaining plate member. It is a front view of the temporary fence attached to the ground surface which inclines.

  As shown in FIG. 1, a lower earth retaining wall structure 10 of a temporary fence according to a preferred embodiment of the present invention is an assembly type provided around a site in a building construction site of a building such as a residential building, for example. Temporary fence 11 is provided as a structure for preventing earth and sand such as excavated earth and sand in the site from protruding from the space portion 21 between the ground surface 20 below the planar fence member 12 and the ground fence 20. Is. In other words, the plurality of fence posts 13 constituting the temporary fence 11 are erected from the ground surface 20 via the jack base 14 so that the height can be adjusted, and both ends are supported by the fence posts 13 and attached. Since the surface fence member 12 to be formed is attached in a state of being floated from the ground surface 20, for example, temporary installation in the site is performed via the space portion 21 below the surface fence member 12. In order to prevent the excavated earth and sand temporarily placed on the peripheral portion along the fence 11 from protruding outside the site, the lower earth retaining wall structure 10 of the temporary fence of the present embodiment is provided.

  The lower earth retaining wall structure 10 of the temporary fence according to the present embodiment is erected from the ground surface 20 via the jack base 14, and has a plurality of fence posts 13 arranged at predetermined intervals and adjacent to each other. In the temporary fence 11 composed of the planar fence members 12 that are attached to both ends supported between the fence posts 13 to be covered, the gap portion 21 between the lower end of the planar fence member 12 and the ground surface 20 is covered. 2 and 3, the fence post 13 is supported by a post pile 15 driven into the ground surface 20 on the back side of the temporary fence 11. The lower earth retaining wall structure 10 supports both ends of the pillar pile 15 so as to prevent the body from falling down (inside and outside the site). A planar sheath member 16 having an insertion opening 16a (see FIG. 4) opened downward, and a retaining plate that is loosely fitted to the planar sheath member 16 so as to be slidable up and down. The earth retaining plate member 17 is made of a planar fence by bringing the lower end edge portion 17a into contact with the ground surface 20 by its own weight with the upper portion 17b inserted into the planar sheath member 16 from the insertion port 16a. The gap portion 21 between the lower end of the member 12 and the ground surface 20 is covered.

  In the present embodiment, the guide rail members 18 having the rail grooves 18a open to the side are provided in the side edge portions on both sides of the back surface of the planar sheath member 16 so as to extend in the vertical direction. , Between the adjacent pair of planar fence members 12, by locking the side end portions on both sides to a pair of guide rail members 18 provided on each side edge portion, and dropping the gap adjustment plate 19, The gap between the adjacent pair of retaining plate members 17 is covered.

  In this embodiment, each fence support | pillar 13 which comprises the temporary fence 11 consists of a metal pipe member of the hollow cylinder shape of about (phi) 50mm, for example, and has a length of about 150 cm, for example. Each fence post 13 is erected from the ground surface 20 via the jack base 14 by inserting a known male screw rod 14a of the jack base 14 into the lower end opening, and is also supported by a support sleeve 14b screwed to the male screw rod 14a. By rotating (see FIG. 2) and moving the support sleeve 14b up and down along the male screw rod 14a, the heights of the fence columns 13 can be adjusted. Further, a plurality of fence posts 13 are erected and arranged at predetermined intervals of, for example, about 160 to 170 cm corresponding to the width of the planar fence member 12 along the boundary line of the site. Between the pillars 13, the planar fence members 12 are respectively attached by supporting both ends to the fence pillars 13 through known engagement means.

  As shown in FIG. 1, each planar fence member 12 constituting the temporary fence 11 includes a rectangular fence frame 12a, and a protective member 12b attached to the inside of the fence frame 12a with a peripheral edge supported by the fence frame 12a. A protective net or a protective panel is used as the protective member 12b. In the present embodiment, the fence frame 12a is partitioned into two upper and lower stages by a transverse frame 12c, and a protective net is attached to the upper part and a protective panel is attached to the lower part.

  Moreover, in this embodiment, the fence support | pillar 13 is directly supported by the support | pillar pile 15 driven in the ground surface 20 of the back side (site inner side) of the temporary fence 11, as shown in FIG. Eleven sites are prevented from falling in and out. That is, the pillar pile 15 is made of, for example, a single pipe, and is driven into the inside of the site near the fence pillar 13 so as to stand in parallel with each fence pillar 13. The fence struts 13 are firmly supported and fixed at the upper and lower two positions above the jack base 14 by using a known single pipe pipe clamping member 22 to the driven pillar pile 15.

  And in this embodiment, the lower earth retaining wall structure 10 of the temporary fence is erected in parallel with the fence column 13 and supported at both ends of the column pile 15 as shown in FIG. The planar sheath member 16 and the earth retaining plate member 17 which is loosely fitted to the planar sheath member 16 so as to be slidable up and down are configured.

  The planar sheath member 16 has a lateral width of, for example, about 160 to 170 cm, which is substantially the same as the planar fence member 12, for example, and is higher than the height of the interval portion 21 between the lower end of the planar fence member 12 and the ground surface 20. As a large vertical width, for example, a pair of rectangular metal thin plates having a vertical width of about 20 to 30 cm, for example, is overlapped with an interval of, for example, about 20 to 30 mm, and one length serving as the insertion port 16a. By integrally joining the three peripheral portions excluding the side portions, a hollow portion capable of loosely fitting the earth retaining plate member 17 is held inside.

  Moreover, in this embodiment, the guide rail member 18 which has a flat U-shaped cross-sectional shape on the side edge part of the both sides on the back side used as the surface inside the site | surface of the planar sheath member 16 is a surface. The sheath member 16 is attached so as to extend in the longitudinal direction parallel to the short side portion. The guide rail member 18 has a length of, for example, about 20 to 30 cm corresponding to the length (vertical width) of the short side portion of the planar sheath member 16, and has a width of, for example, about 100 mm. In a state where the inner rail groove 18a having a U-shaped cross-section is opened toward the side which is the adjacent planar sheath member 16 side by joining or the like, the substantially total length in the height direction of the planar sheath member 16 It is attached over.

  In addition, the guide rail member 18 can also be joined to the planar sheath member 16 by a single point system so as to be rotatable by bolt joining or the like. Accordingly, the guide rail member 18 can be appropriately tilted with respect to the planar sheath member 16, and when the ground surface 20 on which the temporary fence 11 is installed is tilted, a gap corresponding to this is provided. The adjustment plate 19 can be dropped in an oblique direction.

  Further, in the present embodiment, fixing plate pieces 23 are respectively provided so as to protrude from the edge portions on both sides of the planar sheath member 16 to the planar fence member 12 side which is the outside of the site. Both end portions of the planar sheath member 16 are supported and fixed to the pillar pile 15 via the plate piece 23. That is, as shown in FIG. 4, the fixing plate piece 23 is made of, for example, a strip-shaped metal plate, and one end thereof is welded to the surface that is the surface outside the site of the planar sheath member 16. Thus, it is attached in two steps to the upper end corner and the lower end corner of the planar sheath member 16 in a state of vertically projecting from the surface to the outside of the site.

  In addition, bolt fastening holes 24 are formed in the distal end portions of the respective fixing plate pieces 23 on the side opposite to the joining end portions to the planar sheath member 16. In this bolt fastening hole 24, a male screw bolt 25a of a clamp member 25 with a double-sided bolt for a known single pipe pipe (see FIG. 3) fixed to the mounting height position of the fixing plate piece 23 in the pillar pile 15 is provided. Is inserted and tightened by the wing nut 26, the planar sheath member 16 is supported by the support pile 15 and spaced from the planar fence member 12 by, for example, about 60 mm. The members 12 are mounted side by side on the lower back side.

  The earth retaining plate member 17 that is loosely fitted to the planar sheath member 16 has a lateral width that is smaller than the lateral width of the planar sheath member 16, for example, about 158 to 168 cm, and is substantially equal to the longitudinal width of the planar sheath member 16. A rectangular metal thin plate member having a vertical width of about 19 to 29 cm, for example. The earth retaining plate member 17 is placed between the lower end of the planar fence member 12 and the ground surface 20 by bringing the lower edge 17a into contact with the ground surface 20 by its own weight with the upper portion inserted into the planar sheath member 16. It protrudes from the planar sheath member 16 with a protruding length corresponding to the height of the interval portion 21, and covers the interval portion 21 below the planar fence member 12. In addition, the earth retaining plate member 17 has a width smaller than the width of the planar sheath member 16 and is loosely fitted in the hollow inside thereof, whereby the ground surface 20 on which the temporary fence 11 is installed. Is inclined, the bottom edge 17a can be brought into contact with the ground surface 20 in a state in which the earth retaining plate member 17 is inclined correspondingly.

  The gap adjusting plate 19 dropped into the gap between the pair of adjacent earth retaining plate members 17 has a width of about 20 to 30 cm, for example, and is similar to the vertical width of the planar sheath member 16, for example, 30 to 40 cm. It is a rectangular metal thin plate member having a vertical length of about. The gap adjusting plate 19 engages the side end portions on both sides with the rail grooves 18a of the pair of guide rail members 18 provided between the pair of adjacent planar sheath members 16, respectively. In the state, it is slidable up and down along the guide rail member 18. The gap adjusting plate 19 has a lateral width that is longer than the interval between the pair of guide rail members 18 on both sides and shorter than the interval between the deepest portions of the pair of rail grooves 18a on both sides. The guide rail member 18 is loosely fitted. When the ground adjustment surface 19 on which the temporary fence 11 is installed is inclined because the clearance adjustment plate 19 is loosely fitted between the pair of guide rail members 18, the clearance adjustment plate 19 is associated with this. In the state which inclined, the clearance gap between a pair of adjacent planar sheath member 16 and the earth retaining plate member 17 is covered from a back side, and a lower end edge part can be made to contact the ground surface 20 now. .

  And according to the lower earth retaining wall structure 10 of the temporary fence of this embodiment, both ends are supported by the pillar pile 15 driven into the ground surface 20 on the back side of the fence pillar 13, and the earth retaining plate member 17 is By covering the space | interval part 21 between the lower end of the planar fence member 12 and the ground surface 20 with the earth retaining plate member 17 by the simple structure which only attaches the planar sheath member 16 mounted loosely, for example, a site It is possible to effectively prevent the excavated earth and sand temporarily placed at the peripheral portion along the temporary fence 11 inside from protruding outside the site.

  In addition, according to the present embodiment, between the adjacent pair of planar fence members 12, the side end portions on both sides are respectively engaged with the pair of guide rail members 18 provided on the side edge portions, and the gap By dropping the adjustment plate 19, the gap between the pair of adjacent earth retaining plate members 17 is covered, so that it is possible to more effectively avoid the earth and sand on the site from protruding outside the site. become.

  Therefore, according to the lower earth retaining wall structure 10 of the temporary fence according to the present embodiment, the earth and sand in the site surrounded by the temporary fence 11 can be formed by a simple configuration so that the lower edge of the planar fence member 12 and the ground surface 20 It is possible to effectively prevent the outside of the site from protruding through the space portion 21 between the two.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the lower earth retaining wall structure according to the present invention is a temporary fence provided around various other sites such as a construction site for civil engineering, a construction site for civil engineering, and various event venues. It can be attached to and used. Moreover, it is not always necessary to provide a gap adjusting plate that covers the gap between a pair of adjacent retaining plate members. Furthermore, for example, as shown in FIG. 5, when the temporary fence 11 is provided on the ground surface 20 with a steep slope, a pair of fence posts 13 are disposed on both sides of each planar fence member 12. However, by driving the pillar piles 15 into the ground surface 20 on the back side of each fence pillar 13, the lower earth retaining wall structure by the planar sheath member and the earth retaining plate member can be easily formed as in the above embodiment. Can be provided.

DESCRIPTION OF SYMBOLS 10 Lower earth retaining wall structure of temporary fence 11 Temporary fence 12 Plane fence member 13 Fence support | pillar 14 Jack base 15 Post pile 16 Plane sheath member 16a Insertion slot 17 Dust plate member 18 Guide rail member 18a Rail groove 19 Gap adjustment plate 20 Ground surface 21 Spacing portion 22, 25 Clamp member 23 Fixing plate piece 24 Bolt fastening hole

Claims (3)

A planar fence member installed from a ground surface via a jack base and having a plurality of fence posts arranged at a predetermined interval and supporting both ends between adjacent fence posts. In the temporary fence consisting of the lower fence retaining wall structure of the temporary fence for covering the interval portion between the lower end of the planar fence member and the ground surface,
The fence post is designed to prevent the temporary fence from falling down by being supported by a post pile driven into the ground surface on the back side of the temporary fence,
A planar sheath member having both ends supported by the pillar pile and arranged side by side on the lower back side of the planar fence member, with an insertion opening opening downward, and the planar sheath member It consists of a retaining plate member loosely fitted so that it can slide up and down,
The earth retaining plate member is inserted into the planar sheath member from the insertion opening, and the lower edge of the earth retaining plate member is brought into contact with the ground surface by its own weight, so that the lower end of the planar fence member and the ground surface The lower earth retaining wall structure of the temporary fence that covers the space between them. A guide rail member having a rail groove opened sideways is provided on the side edge portion of the back surface of the planar sheath member so as to extend in the vertical direction, and a pair of adjacent planar fence members. Between the adjacent retaining plate members by locking the side end portions on both sides to a pair of guide rail members provided on each side edge portion and dropping the gap adjusting plate The lower earth retaining wall structure of the temporary fence according to claim 1, wherein Projecting from the side edge portion of the planar sheath member to the planar fence member side, fixing plate pieces are respectively provided, and both ends of the planar sheath member are connected to the support column via the fixing plate pieces. The lower earth retaining wall structure of a temporary fence according to claim 1 or 2, which is supported and fixed to a pile.

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