JP2008031740A - Guard fence against collapsed sediment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard fence against collapsed sediment which can prevent the fall of the collapsed sediment to a road etc. by stopping the collapsed sediment. <P>SOLUTION: This guard fence 1 against the collapsed sediment prevents the fall of the collapsed sediment. Supports 2 and 3 are erected at an interval; rope materials 4 and 4 are laid at vertical intervals between the supports 2 and 3; a protective surface 7 is formed; and the vertical interval between the lower rope materials 4 and 4 is set shorter than the vertical interval between the upper rope materials 4 and 4. A falling stone can be captured by the protective surface 7 in the range of the height of the supports 2 and 2, and the collapsed sediment can be captured by a lower portion of the protective surface 7. Thus, since the impact force of the collapsed sediment is stopped by shortening the interval between the lower rope materials 4 and 4, the guard fence can also cope with the collapsed sediment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a collapsed earth and sand protective fence that is constructed on a slope portion of a mountainside and receives collapsed earth and sand and prevents falling on a road or the like.

  Conventionally, as this kind of collapsible sediment protection fence, various retaining walls made of concrete or iron that stop the collapsible sediment such as steep slopes, landslides, cut surfaces, and rock fall are known, gravity type, There are a stand-by type, a leaning type, and the like, and any type is formed by on-site cocleat (for example, Patent Document 1). In this way, the retaining wall formed of concrete can stop the collapsed sediment and rock fall, but it cannot prevent the generation of the collapsed sediment, so it is used in combination with the slope stabilization structure. For example, as an anchor for slope stabilization used in a slope stabilization structure, as in the case where a lock bolt is used as an anchor shaft body, the anchor shaft is inserted into the ground as it is, or a deformed PC steel rod is used as an anchor shaft. There is known a body that forms a body and is fitted with a sheath made of polyethylene or the like to form a free length (for example, Patent Document 2).

  Also, without using the retaining wall, the pressing member installed on the slope is inserted into the ground through the anchor material in the center, and the head is fixed to fix the ground on the slope. A slope stabilizing structure for stabilization (for example, Patent Document 3) is also known.

On the other hand, a steel pipe pile used as a landslide deterrent pile or earth retaining pile, wherein the outer steel pipe and the inner steel pipe are arranged concentrically with each other along the same axis, and between the outer steel pipe and the inner steel pipe A double-pipe structure (for example, Patent Document 4) in which concrete is filled in the annular gap is also known.
JP 2004-278081 A JP-A-6-146277 JP 2004-44384 A JP-A-8-184037

  In the combination of Patent Document 1 and Patent Document 2 described above, falling rocks can be stopped by the retaining wall. However, in the construction, the anchor wall is placed and the slope is reinforced to construct the retaining wall. The property is bad and the construction period becomes longer. Moreover, in the slope stabilization structure of the said patent document 3, since it is necessary to drive an anchor to the whole slope, a construction range is wide and a construction period also becomes long.

  On the other hand, in the method of placing steel pipe piles, landslides and slope failures can be suppressed, but roads cannot be protected from falling rocks when falling rocks occur on the slopes.

  Therefore, the present invention aims to provide a collapsed earth and sand protective fence that can receive the collapsed earth and prevent it from falling onto a road or the like, and in addition, suppresses the occurrence of collapsed earth and sand due to landslides and slope failures. The purpose is to provide a debris protection fence that can be used.

  The invention of claim 1 is a collapsible earth and sand protection fence for preventing the fall of collapsible earth and sand, and supports are installed upright at intervals, and a rope member is erected between these columns at intervals up and down and a protective surface is provided. The upper and lower rope members have a lower vertical distance than the upper rope member.

  In the invention according to claim 2, the vertical distance of the lower rope material is narrower than the upper rope material.

  According to a third aspect of the present invention, the support column protrudes from the moving layer, and the lower portion of the support column is built in the immovable layer.

  According to a fourth aspect of the present invention, the support column comprises a support column upper part and a support column lower part which are vertically divided.

  According to a fifth aspect of the present invention, a receiving tube portion for inserting and fixing the lower end of the upper portion of the column is provided above the lower portion of the column.

  In the invention of claim 6, the upper portions of the columns are connected by a connecting rod.

  According to a seventh aspect of the present invention, when the rope member is gripped by a shock absorber, the shock absorber is connected to the support column, and the rope member slides against the shock absorber when a predetermined tensile force is applied to the rope member. It moves.

  According to the configuration of the first aspect, the falling rock can be captured by the protective surface in the height range of the support column, and the collapsible sediment is captured at the lower part of the protective surface. After receiving the impact force, the collapsed sediment can be deposited on the protective surface in the height range of the column.

  Moreover, according to the structure of Claim 2, since it can catch by the protective surface of the height range of a support | pillar with respect to falling rock, and it catches in the lower part of a protective surface with respect to collapsed earth, By narrowing the interval, it is captured at the lower part of the protective surface. After receiving the impact force of the collapsible sediment at the lower part of the protective surface, the collapsible sediment can be deposited on the protective surface in the height range of the column. It is possible to receive the impact force of and effectively cope with the collapsed sediment.

  Moreover, according to the structure of Claim 3, the support | pillar which built the lower part in the immovable layer acts as a landslide suppression pile, and can suppress collapse of the moving layer which provided the support | pillar.

  Moreover, according to the structure of Claim 4, since a support | pillar upper part and a support | pillar lower part are integrated and a support | pillar is comprised, a long support | pillar can be divided and conveyed and carried into a support | pillar lower part and a support | pillar upper part, Stable strength can be obtained by driving the struts up to the non-moving layer even in unstable places where there is a possibility of collapse.

  According to the fifth aspect of the present invention, by inserting and fixing the lower end of the upper portion of the column to the receiving tube portion, the upper portion of the column and the lower portion of the column can be integrated, and the lower portion of the column is fixed to the installation location. Thus, the support column can be erected. In addition, since the receiving tube portion is integrally provided in advance at the lower portion of the column, the upper portion of the column and the lower portion of the column can be firmly integrated by securing the bonding strength between the receiving tube portion and the upper portion of the column.

  Moreover, according to the structure of Claim 6, while connecting the upper part of each support | pillar with a connection rod, while being able to raise the connection strength of each support | pillar, strength improvement is improved by the portal type structure of a support | pillar and a connection rod. Figured.

  Moreover, according to the structure of Claim 7, when a protective fence receives collapsed earth and sand, rock fall, etc. and tensile force is added to a rope material, an impact force will be absorbed by a rope material sliding with respect to a buffer metal fitting. The

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a collapsed sediment protection fence different from the conventional one, an unprecedented collapsed sediment protection fence is obtained, and each of the collapsed sediment protection fences is described.

  Embodiments of the protective fence according to the present invention will be described below with reference to FIGS. The guard fence 1 has a plurality of intermediate pipe struts (intermediate struts) 3, 3... Arranged at intervals between terminal pipe struts (terminal struts) 2, 2 arranged on both sides. In addition, the rope members 4 in the horizontal direction are installed in multiple stages at intervals in the vertical direction, and a wire mesh 5 knitted with a metal wire is stretched on the front side as a protective mesh body, and the protective surface is formed by the rope material 4 and the wire mesh 5. 7 is constituted. And these support | pillars 2 and 3 are built in the vertical hole Y1 drilled in the slope Y of the mountainside. The wire mesh 5 is stretched in front of the rope material 4. The rope material 4 is a wire rope or the like. In this example, four intermediate pipe struts 3, 3, 3, 3 are arranged between the terminal pipe struts 2, 2. In this embodiment, six units 2, 3, 3, 3, 3, and 2 are provided as a unit, and the columns 3, 3, and 3 are provided on the right side of the column 2 of the right terminal in FIG. , 3 and 2 constitute the protective fence 1. That is, the second end pipe strut 2 from the right in FIG. 1 also serves as the end pipe strut of the right unit (not shown).

  The terminal pipe strut 2 and the intermediate pipe strut 3 are built on the slope Y or the like, and the built-in terminal pipe strut 2 and the intermediate pipe strut 3 are connected to each other by a connecting rod 6, and the intermediate pipe struts 3, 3 are Are connected to each other by a connecting rod 6. The terminal pipe strut 2, the intermediate pipe strut 3, and the connecting rod 6 are formed of steel pipes having a circular cross-sectional shape. For such terminal pipe struts 2 and intermediate pipe struts 3, load-resistant materials are used.

  In the present invention, the connecting rod 6 has a circular cross section, and the connecting rod 6 is preferably a filled steel pipe filled with concrete or non-shrinkable mortar 11 inside the steel pipe, and the end of the connecting rod 6 is formed. The terminal pipe strut 2 and the intermediate pipe strut 3 are connected to the end pipe support 2 and the intermediate pipe support 3 so as to be rotatable in the front-rear direction and the up-down direction.

  First, with reference to FIGS. 1 to 5, the rotation coupling mechanism 13 provided in the intermediate pipe column 3 will be described. The rotation coupling mechanism 13 is rotatably fitted on the upper portion of the intermediate pipe column 3. A support cap 14, a connecting outer cylinder 15 for inserting and connecting the end of the connecting rod 6, and a rotating connecting part 16, 16A for connecting the support cap 14 and the connecting outer cylinder 15 so as to be rotatable in the vertical direction. With.

  The connecting outer cylinder portion 15 is closed on the column side by a closing end 151, and a semi-cylindrical portion 152 on the opening side on the opposite column side is detachably provided, and the end 6A of the connecting rod 6 is connected to the connecting outer cylinder portion 15. Is inserted and the semi-cylindrical part 152 is fastened to the connecting outer cylinder part 15, whereby the connecting rod 6 is fastened and fixed to the connecting outer cylinder part 15.

  The rotation connecting portion 16A includes a lateral pivot 17 made of a bolt or the like that rotatably connects the support cap 14 and the connecting outer cylinder portion 15.

  Therefore, the connecting outer cylinder portions 15 on both sides with respect to the intermediate pipe support 3 rotate in the vertical direction around the pivot 17 and can rotate in the front-rear direction around the support cap 14.

  Next, as shown in FIGS. 4 and 5, the pivot coupling mechanism 12 has a column cap 14 coupled to the terminal pipe column 2 so as to be capable of plane rotation. The portion 15 rotates in the vertical direction about the pivot 17 and can be rotated in the front-rear direction about the support cap 14.

  It should be noted that by adjusting the amount of insertion of the end of the connecting rod 6 into the connecting outer cylinder portion 18, the connecting rod 6 can be adjusted in accordance with the distance between the columns 2, 3, and 3.

  Further, as shown in FIG. 6, on the front side of the outer periphery of the end pipe support 2, there are provided in multiple upper and lower mounting portions 21 for connecting the ends of the rope material 4. Is formed. The end of the rope member 4 is slidably connected to the end pipe support 2 by a buffer 23.

  As shown in FIGS. 7 to 9, the shock absorber 23 includes a box 31 that houses the rope member 4 and a plurality of protrusions 32 that press the rope member 4 housed in the box 31. And a fastener 39 that fastens the box 31 and the pressing tool 33. The fastener 39 includes a bolt 39A, a washer 39B, and a nut 39C. As shown in FIGS. 7 and 8, the box 31 includes an attachment hole 34 for attaching the shock absorber 23 to the columns 2 and 3 using U bolts 40 and the like, a gripping groove 35 for pressing the rope material 4, The grip groove 35 has a guide groove 36 for guiding the rope material 4, a recess-shaped escape portion 37 for releasing a plurality of projections 32 of the pressing tool 33, and a hole for passing a bolt 39 A for pressing the pressing tool 33. . On the bolt insertion side of the box 31 is provided a detent projection 38 that serves as a detent for the bolt 39A. The pressing tool 33 is provided with a plurality of protrusions 32 on one side of a plate or block, and presses the rope material 4 against the box 1. A plurality of the protruding portions 32 are arranged in the longitudinal direction of the rope member 4. When the rope member 4 is pressed against the protrusion 32 of the pressing tool 33, the pressing surface 32 </ b> A is set in a semicircular shape so that the direction of the acting force is directed toward the center of the rope member 4. Combined with the shape, the strands of the rope material 4 do not protrude from the groove. The box body 31 and the pressing tool 33 constitute a grip body for gripping the rope material 4.

  Then, the rope member 4 is accommodated in the grip groove 35 of the box body 31 and the pressing surface 32A of the protrusion 32 of the pressing tool 33 is placed on the rope member 4 so that the pressing force can be exerted from the back side of the box body. The bolt 39A is passed through, communicated with the pressing tool 33, and tightened through a washer 39B and a nut 39C. At this time, the head of the bolt 39A hits the anti-rotation protrusion 38, and co-rotation is avoided. The rope member 4 is guided by the trumpet-shaped portion of the guide groove 36, and the rope member 4 is pushed into the center portion of the groove by the semicircular pressing surface 32A of the protrusion 32 of the pressing tool 33. The gripping force of the rope member 4 is determined by the tightening force of the nut 39B that presses the pressing tool 33. Further, the middle of the U-bolt 40 is inserted into the mounting holes 34, 34, and nuts 41, 41 are screwed into both end portions 40T, 40T.

  When an impact force is applied to the rope member 4 due to factors such as falling rocks or colliding with collapsible earth and sand in such a protective fence provided with the shock absorber 23, this impact force acts on the rope member 4 as a tension. The tension is transmitted to the buffer 23. The rope member 4 is gripped by the frictional resistance between the pressing surface 32A of the protrusion 32 of the pressing tool 33 and the gripping groove 35 of the box 31. Therefore, when the tension acting on the rope member 4 is equal to or less than the set frictional force, the rope member 4 does not slide. When the tension acting on the rope material 4 exceeds the set friction force, the rope material 4 starts to slide, and the impact energy is effectively attenuated by the sliding friction resistance.

  In the buffer 23, as shown in FIG. 8, the box 39 upper surface 31A is clamped with the box 39 and the pressing tool 33 gripping the rope member 4 with a predetermined frictional resistance. There is a gap K between the lower surface 33A of the pressing tool 33, and there is a gap between the pressing surface 32A of the projection 32 and the upper end 35A of the holding groove 35, that is, tightening is further performed in the holding state. It has a tightening allowance. Therefore, in this example, the shock absorber 23 that can set the frictional resistance by adjusting the tightening force of the fastener 39 is used.

  As shown in FIGS. 5 and 6, a stopper 42 that can be locked to the shock absorber 23 is provided at the end of the rope member 4. The stopper 42 tightens the rope member 4. The box 31 and the pressing tool 33 are locked.

  In the figure, reference numeral 51 denotes an attachment member for attaching the wire mesh 5 to the rope member 4. A coil is used for the attachment member 51. The horizontal rope member 4 is inserted into this coil, and the coil is rotated to engage with the wire mesh 5. It has stopped. In the figure, 52 is an interval holding member for the rope members 4, 4... Provided in multiple upper and lower stages. A vertical rope member 52 A and the like are suspended from the connecting rod 6, and the vertical rope member 52 A and the rope member 4 are connected. It is connected by a binding tool 52B. Thus, by connecting the rope material 4 in a plurality of stages with the vertical rope material 52A, the rope material 4 can be integrated and impact energy such as falling rocks can be dispersed in the plurality of rope materials 4 and the impact absorbing effect can be enhanced. . Reference numeral 61 in the figure denotes an engaging portion provided on the support column 3, and the rope member 4 is engaged therewith.

  Next, the load-bearing material 101 used for the support columns 2 and 3 will be described. As shown in FIGS. 9 to 11, the load-bearing material 101 has an inner steel pipe having a circular cross section with a space in the outer steel pipe 102 having a circular cross section. 103 is inserted and arranged, and a plurality of reinforcing steel bars 104 are arranged between the outer steel pipe 102 and the inner steel pipe 103, and the outer filling between the outer steel pipe 102 and the inner steel pipe 103 in which the reinforcing steel bars 104 are arranged. The space 105 is filled with a non-shrinking mortar 106 as a filler, and the inner filling space 107 inside the inner steel pipe 103 is filled with the non-shrinking mortar 106 and cured.

  The reinforcing steel bar 104 is a deformed steel bar, and has a trapezoidal screw part 111 as an unevenness on the outer periphery thereof in the entire length direction. In addition, on the outer periphery of the reinforcing steel rod 104, plane portions 112, 112 continuous in the length direction are provided on both sides of the cross section, and the trapezoidal screw portion 111 is cut off on the plane portion 112, and both sides of the diametrical direction are provided. The flat portions 112 and 112 are parallel.

  The interval between the flat portions 112 of the reinforcing steel rod 104 is set slightly narrower than the interval between the inner surface of the outer steel tube 102 and the outer surface of the inner steel tube 103. Three or more reinforcing steel rods 104 are arranged in the outer filling space 105. In this example, four reinforcing steel rods 104, 104A, 104A, 104A are arranged in the outer filling space 105 at equal intervals in the circumferential direction. And the adjacent reinforcing steel bars 104, 104A, 104A, 104A are at a position that makes an angle of 90 degrees in the circumferential direction. The reinforcing steel rod 104A has the same configuration as the reinforcing steel rod 104 except for the arrangement position. Further, the reinforcing steel rods 104, 104 are arranged next to the reinforcing steel rod 104, and the three reinforcing steel rods 104, 104, 104 are arranged at an angle of 30 degrees in the circumferential direction.

  Next, the manufacturing method of the load bearing material 101 will be described. First, as shown in FIG. 10, the reinforcing steel rods 104, 104, 104, 104A, 104A, 104A are fixed to the outer surface of the inner steel pipe 103. In this case, one flat portion 112 is fixed along the outer surface of the inner steel pipe 103 by welding or the like. In this manner, the inner steel pipe 103 to which the reinforcing steel bars 104, 104, 104, 104A, 104A, 104A are fixed is inserted into the outer steel pipe 102. In this case, the inner steel pipe 103 is inserted into the outer steel pipe 102 with the flat portions 112 of the plurality of reinforcing steel rods 104, 104, 104, 104 A, 104 A, 104 A along the inner surface of the outer steel pipe 102. be able to. Then, after insertion, the steel pipes 102 and 103 are arranged with one end side facing upward, and the non-shrinkable mortar 106 is filled into the outer filling space 105 and the inner filling space 107 from the upper opening, and the load-carrying material is cured. 101 is obtained. Note that the load-bearing material 101 before filling with the filler may be plated with zinc or the like.

  Next, the characteristic configuration of the present embodiment will be described. The slope Y is a place where there is a risk of occurrence of landslides and landslides due to landslides and slope failures in addition to falling rocks. As shown in FIG. Is installed in the lower part of the slope Y, and the rope members 4, 4... Provided in the upper and lower multi-stages of the protective fence 1 have a vertical distance between the rope members 4, 4, 4, 4, 4 in the sixth step from the bottom. The height of the rope material 4 in the sixth step from the bottom is about 1 meter or more from the slope Y, and the columns 2, 3 are More than twice its height H.

  In the protective fence 1 installed on such a slope Y, falling rocks fall while rolling on the slope Y, while collapsible earth and sand fall along the slope Y, so that they collide with the lower part of the protective fence 1. On the other hand, in the present embodiment, the distance between the lower rope members 4 and 4 can be narrowed, and the collapsed earth and sand on the slope Y can be captured by the rope members 4 and 4 and the wire mesh 5. As a modification, the rope members 4, 4... At all stages may be equally spaced.

  As described above, in this embodiment, in the collapsible earth and sand protection fence 1 for preventing the fall of the collapsible earth and sand, the columns 2 and 3 are erected at intervals, and the ropes are vertically spaced between these columns 2 and 3. Since the materials 4 and 4 are installed and the protective surface 7 is provided, the falling rocks can be captured by the protective surface 7 in the height range of the columns 2 and 2, and the collapsed earth and sand can be captured below the protective surface 7. Since it captures, after receiving the impact force of the collapsed sediment at the lower part of the protective surface 7, the collapsed sediment can be deposited on the protective surface 7 in the height range of the columns 2, 3.

  As described above, in this embodiment, in the collapsible sediment protection fence 1 for preventing the fall of the collapsible sediment, the columns 2 and 3 are erected at intervals, and the columns 2 and 3 are spaced vertically. In addition, the rope members 4 and 4 are installed and the protective surface 7 is provided, and the upper and lower rope members 4 and 4 are narrower than the upper rope members 4 and 4, so that the height of the supports 2 and 2 is high against falling rocks. It can be captured by the protective surface 7 in the range, and for the collapsed sediment, it is captured at the lower part of the protective surface 7, so by receiving the impact force of the collapsed sediment by narrowing the distance between the lower rope members 4, 4, It can cope with collapsed earth and sand effectively.

  Further, in this embodiment, since the upper portions of the support columns 2, 3, 3 are connected by the connecting rods, the upper portions of the support columns 2, 3, 3, 2 are connected by the connecting rod 6, thereby , 3, 3, 2 can be increased, and the portal structure of the support columns 2, 3, 3, 2 and the connecting rod 6 can improve the strength.

  As described above, in this embodiment, the rope member 4 is gripped by the shock absorber 23, the shock absorber 23 is connected to the support 2, and when a predetermined tensile force is applied to the rope member 4, Since the rope material 4 slides, when the protective fence 1 receives falling rocks, collapsing earth and sand, and the tensile force is applied to the rope material 4, the rope material 4 slides against the shock absorber 23, so that the impact force is reduced. Can be absorbed.

  Further, as an effect on the embodiment, since the terminal support column 2 is provided with the holes 22 capable of connecting the shock absorbers 23, 23 on both sides, the terminal support column 2 that connects the shock absorber 23 only on one side (the right side in FIG. 1). ) And the pipe portions of the terminal struts 2 (second from the left side in FIG. 1) connecting the shock absorbers 23, 23 on both sides can be used as the same structure.

  Further, as an effect of the embodiment, the support rods 6 are provided with the rotation connecting mechanisms 12 and 13 for connecting the end portions of the connecting rods 6 to the support columns 2 and 3 so as to be capable of rotating in the front-rear direction and in the vertical direction. , 3 is connected so as to be pivotable in the front-rear direction and the up-down direction. Can be absorbed and the damage of the support | pillars 2 and 3 can be suppressed.

  Further, as an effect of the embodiment, the connecting rod 6 is a filled steel pipe filled with a non-shrink mortar (not shown) serving as a filling material, and the rotation connecting mechanisms 12 and 13 are provided at the end portion 6A of the connecting rod 6. Because it has a connecting outer cylinder part 15 for inserting and connecting the pipe, the use of a filled steel pipe for the connecting rod 6 can provide excellent deformation performance, improve the shock absorption capacity, and the rotating connecting mechanisms 12 and 13 can be connected. Since the outer cylinder portion 15 is provided, the connecting outer cylinder portion 15 is rotatably connected to the support columns 2 and 3, and the end portion of the connecting rod 6 is inserted into the connecting outer cylinder portion 15 to be connected. After the end of the connecting rod 6 is inserted and arranged in the cylindrical portion 18, the connecting outer cylindrical portion 15 may be connected to the columns 2 and 3, and the connecting operation of the connecting rod 6 to the columns 2 and 3 can be easily performed. it can.

  Further, hereinafter, as an effect on the embodiment of the load bearing material 101, the support upper portion 2U and the support lower portion 2S are composed of the load bearing material 101, and the load bearing material 101 is disposed in the outer steel pipe 102 and the outer steel pipe 102. The inner steel pipe 103, the reinforcing steel rod 104 arranged between the outer steel pipe 102 and the inner steel pipe 103, and the non-shrink mortar 106 filled between the outer steel pipe 102 and the inner steel pipe 103, The non-shrink mortar 106 is restrained by the inner and outer steel pipes 102, 103, the compressive stress is improved, and the reinforcing steel rods 104, 104, 104 between the outer and inner steel pipes 102, 103 are made the tensile region side. The reinforcing steel rods 104, 104, 104 can improve the tensile stress on the tensile region side against the tensile force caused by bending, and can effectively improve the stress against the load. Moreover, the steel pipes 102, 103 and the steel By combining with the rods 104, 104, 104, the load-bearing material 101 for the column 2 can be easily configured. It can be. Further, since the reinforcing steel rod 104 has the trapezoidal screw portion 111 that is uneven on the outer periphery, the adhesion between the reinforcing steel rod 104 and the non-shrink mortar 106 is improved by the trapezoidal screw portion 111, and the reinforcing steel rod 104 and the non-shrink mortar 106 can be integrated. Further, since the reinforcing steel rod 104 has the flat portions 112 and 112 that are continuous in the length direction on both sides, it is easy to fix to the steel pipes 102 and 103 using the flat portions 112 and 112, and the flat portion 112 is The surface is in contact with the steel pipes 102 and 103, and the operation of inserting the inner steel pipe 103 into the outer steel pipe 102 during manufacture becomes easy. In addition, since three or more reinforcing steel bars 104 and 104A are fixed to the inner surface of the outer steel pipe 102 or the outer surface of the inner steel pipe 103, the inner steel pipe 103 is inserted into the outer steel pipe 102. Therefore, the inner steel pipe 103 is inserted into the outer steel pipe 102 and the inner steel pipe 103 is easily inserted and positioned in the cross-sectional direction, and the manufacturing process can be simplified. Here, the reason why the number of reinforcing steel bars 104, 104A is three or more is that if the inner steel pipe 103 is supported and positioned by the reinforcing steel bars 104, 104A, there are three or more reinforcing steel bars 104, 104A. This is because the three reinforcing steel bars 104, 104A, and 10A can be positioned at a position that forms an angle of 120 degrees in the circumferential direction. Further, since the four reinforcing steel bars 104, 104A, 104A, 104A are arranged at a position that makes an angle of 90 degrees in the circumferential direction, the steel pipes 102, 103 can be positioned with certainty.

  FIGS. 12-17 shows Example 2 of this invention, attaches | subjects the same code | symbol to the same part as the said Example 1, and abbreviate | omits the detailed description, In this example, in this example, said support | pillar 2, 3 is formed by connecting a column upper portion 2U and a column lower portion 2S which are divided into two vertically, and the load bearing material 101 is used for the column lower portion 2S and the column upper portion 2U.

  A receiving tube portion 211 made of a steel pipe is integrally provided on the upper portion of the support lower portion 2S, and the upper end of the receiving tube portion 211 is open. In the state where the upper end of the support column lower part 2S is arranged at the center in the length direction of the receiving tube part 211, the lower end 211S of the receiving tube part 211 is welded to the outer surface of the support column lower part 2S, and the outer surface of the support column lower part 2S A clearance S is provided between the inner surface of the receiving tube portion 211 and the dimension of the clearance S is 10 mm or less. That is, the inner diameter of the receiving tube portion 211 is formed to be larger than the outer diameter of the support lower portion 2S. The support lower part 2S is plated after the receiving tube portion 211 is provided, and the support upper part 2U is plated after the plating joint 213 is provided.

  A saddle joint 212 is provided at the upper end of the receiving tube portion 211, and a saddle joint 213 is provided on the outer surface of the upper column 2 </ b> U corresponding to the saddle joint 212. A plurality of air vent holes 213A are also formed. Bolt insertion holes 214 and 214 are formed at equal intervals in the circumferential direction in these flange joints 212 and 213, and the lower part of the upper column 2 </ b> U is inserted into the receiving tube portion 211, and packing 215 is inserted into these flange joints 212 and 213. The bolts 216 are inserted into the bolt insertion holes 214 in a state where they are overlapped with each other, and nuts are screwed together to join them. In the state where the flange joints 212 and 213 are overlapped, a gap in the length direction is formed between the lower end of the column upper part 2U and the upper end of the column lower part 2S, and this gap S is 15 mm or less, preferably 10 mm. However, the column upper portion 2U can be angle-adjusted with respect to the column lower portion 2S by the gap in the length direction and the gap S between the receiving tube portion 211 and the column upper portion 2U. In this case, for example, the angle can be adjusted by inserting a spacer (not shown) at an appropriate position between the flange joints 212 and 213.

  Further, a thick part 217 is provided on the outer surface of the receiving cylinder part 211 at the substantially center in the length direction. The thick portion 217 is disposed across the gap in the length direction between the lower end of the column upper part 2U and the upper end of the column lower part 2S. Note that the receiving tube portion 211, the thick portion 217, and the flange joints 212 and 213 are made of steel.

  Further, holes 221 and 221 communicating with the gap S are formed on both sides of the lower portion of the receiving tube portion 211, and female screw portions are formed in these holes 221 and 221. A filling tube 222 is connected to one of the holes 221. A bent portion 223 bent at approximately 90 degrees is provided at the lower end of the filling tube 222, and an end portion of the bent portion 223 is screwed into the hole 221. The straight portion 224 of the filling tube 222 is It extends upward along the outer periphery of the receiving tube portion 211, and the upper end thereof reaches near the upper end of the receiving tube portion 211, and is filled with a filler injection hole 226 under the flange joint 212 by an elbow 225 of approximately 90 degrees provided at the upper end. Is facing outwards. In addition, a plug 227 having a male screw is detachably screwed into the other hole 221.

  As a bonding agent 218 as a filler to be filled in the gap S, an epoxy resin, preferably an epoxy adhesive using a bisphenol A type epoxy resin, is used for the base range, and it is a two-component consisting of a main agent and a curing agent. Wet surface curing type is used.

  Next, the construction method and the like of the protective fence 1 will be described focusing on the columns 2 and 3. First, a case where the lower column 2S is installed at the installation location and then the upper column 2U is connected will be described. As shown in FIG. 12 and the like, a mounting hole is provided on the slope Y of the mountain where the protective fence 1 is installed. Y1 is drilled, and a boring is used for the drilling, and the support lower part 2S is inserted into the mounting hole Y1 and built. In this case, the slope Y in which the pillars 2 and 3 are built is a landslide zone, forming a formation composed of the moving layer 8 and the immovable layer 9 below, and forming the mounting hole Y1 until reaching the immovable layer 9, The lower parts of the columns 2 and 3 are built in the immovable layer 9.

  If there is a gap between the mounting hole Y1 and the lower column 2S, the lower hole 2S is fixed to the installation place by filling the gap with a filler for the mounting hole. Thus, in the construction of the columns 2 and 3, the long columns 2 and 3 can be constructed separately from the column lower portion 2S and the column upper portion 2U, and the installation workability at the site can be improved. . Further, in the case where the columns 2 and 3 before filling the non-shrink mortar 106 are plated, the column upper portion 2U and column lower portion 2S are shorter than the one, so that the plating process can be easily performed.

  After the construction of the lower column 2S is finished in this way, the upper column 2U is constructed continuously or with time. First, the packing 215 is overlaid on the flange joint 212, the lower end of the upper column 2U is inserted into the receiving tube 211, and the flange joint 213 is overlaid on the flange joint 212. 2U is adjusted and the joints 212 and 213 are temporarily fixed by tightening the bolts 216 and nuts. Then, the bonding agent 218 is filled into the gap S from the filler injection hole 226. In this case, the plug 227 can be removed and the filling state of the bonding agent 218 can be confirmed. After the confirmation, the hole 221 is closed by the plug 227. Also, the bonding agent 218 filled from the filler injection hole 226 is filled into the gap S from the hole 221 at the lower end of the receiving tube portion 211, and the internal air is discharged to the outside through the air vent hole 213A along with the filling. The space between the lower end of the upper column 2U and the upper end of the lower column 2S is filled up to the upper portion of the receiving tube 211.

  Then, as the bonding agent 218 is cured, the support upper part 2U and the support lower part 2S are integrated, and the support pillars 2 and 3 are formed. In this case, since the pulling force is also obtained by the bonding with the bonding agent 218, the bonding of the joints 212 and 213 can be released. In addition, by using a wet surface curing type epoxy adhesive as the bonding agent 218, the construction can be performed even in a site where moisture treatment is difficult.

  It should be noted that the pillar lower part 2S and the pillar upper part 2U may be connected to each other before installation at the installation place. In this case, the pillar lower part 2S and the pillar upper part 2U are separately carried to the installation place or the vicinity thereof. It becomes easy to carry and carry them in, and the column lower part 2S and the column upper part 2U can be integrated at a place suitable for work in the installation place or in the vicinity thereof.

  Note that the column lower portion 2S and the column upper portion 2U may be connected to each other in a factory or the like other than the installation location or the vicinity thereof. In this case, since the long column 2 is divided into the column lower part 2S and the column upper part 2U and manufactured, it is not subject to restrictions such as plating treatment, and is manufactured in a place suitable for work. The struts 2, 3) can be manufactured.

  As described above, in this embodiment, the support columns 2 and 3 protrude from the moving layer 8 and the lower portions of the support columns 2 and 3 are built in the non-moving layer 9. , 3 acts as a landslide suppression pile, and the collapse of the moving layer 8 provided with the columns 2 and 3 can be suppressed.

  Further, in this embodiment, since the support columns 2 and 3 are divided into the upper and lower support columns 2U and the support column lower part 2S, the support columns 2U and the support column lower part 2S are integrated to form the support columns 2 and 3. The long pillars 2 and 3 can be transported and loaded separately into the pillar lower part 2S and the pillar upper part 2U, and the pillars 2 and 3 can be moved to the fixed layer 9 even in unstable places where there is a possibility of sediment collapse. Stable strength can be obtained.

  In this way, in this embodiment, in the support column 2 that connects the support column lower part 2S fixed to the base slope Y and the support column upper part 2U provided on the support column lower part 2S, the support column upper part 2U above the support column lower part 2S. Since the receiving tube portion 211 for inserting and fixing the lower end of the column is provided, by inserting and fixing the lower end of the column upper portion 2U to the tube receiving portion 211, the column upper portion 2U and the column lower portion 2S can be integrated. By fixing 2S at the installation location, the columns 2 and 3 of the protective fence 1 as a protective body can be erected. Since the receiving tube portion 211 is integrally provided in advance on the support column lower portion 2S, the support column portion 211 and the support column lower portion 2S are firmly integrated with each other by ensuring the bonding strength between the receiving tube portion 211 and the support column upper portion 2U. Can be Moreover, the long support | pillars 2 and 3 can be conveyed and carried in divided into the support | pillar lower part 2S and the support | pillar upper part 2U, and the installation workability | operativity in the field can be improved. Further, in the case of plating the support 2, the support upper part 2 </ b> U and the support lower part 2 </ b> S are shorter than the integrated object, so that the plating process can be easily performed. Furthermore, the support | pillar upper part 2U can be standardized and manufactured previously by dividing | segmenting into the support | pillar upper part 2U and the support | pillar lower part 2S.

  In addition, as an effect of the embodiment related to the support columns 2 and 3, the support column lower portion 2S and the support column lower portion 2S are formed by the bonding agent 118 filled between the outer surface of the support column lower portion 2S inserted into the receiving tube portion 211 and the inner surface of the receiving tube portion 211. Since the upper column 2U is bonded, the upper column 2U can be bonded to the receiving tube portion 211 with a predetermined strength by the bonding agent 218. Further, since the lower column 2S and the receiving tube 211 are joined by the joints 213 and 212, the lower column 2S and the upper column 2U can be temporarily joined by the joints 13 and 12. Further, the lower end of the support column upper part 2U and the upper end of the support column lower part 2S are arranged in the receiving tube part 211, and the wall receiving part 211 has a thick part corresponding to the lower end of the support column upper part 2U and the upper end of the support column lower part 2S. Since 217 is formed, the support is discontinuous between the lower end of the support upper part 2U and the upper end of the support lower part 2S. By forming the thick part 217 in the receiving tube part 211 corresponding to this point, , Strength can be ensured.

  In addition, as an effect on other embodiments, the bonding agent 218 is a two-component adhesive comprising an epoxy resin, preferably an epoxy adhesive using a bisphenol A type epoxy resin for the base range, and comprising a main agent and a curing agent. Since the wet surface-curing type is used, the on-site adhesion can be ensured, and the bonding strength can be obtained faster than mortar or the like. Further, a bent portion 223 bent at approximately 90 degrees is provided at the lower end of the filling tube 222, and an end portion of the bent portion 223 is screwed into the hole 221. Since the filler injection hole 226 is above the position close to the upper side of the gap S, the bonding agent 218 injected into the filler injection hole 226 is filled into the gap S by its own weight. In addition, the gap S is narrower than that of a conventional filler such as mortar, and the gap S is 15 mm or less.

  18 to 19 show a third embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. A modification of the load-bearing material 101 used in the above is shown, and a reinforcing body 120 is inserted and fixed in the inner steel pipe 103 and fixed to the inner steel pipe 103, and then the non-shrink mortar 106 is filled and cured. It is. In the reinforcing body 120, three reinforcing ribs 121, 121, 121 made of plate material are arranged in a substantially equilateral triangle, and strip steel plates 122, 122, 122 are formed on the top portions 121S, 121S, 121S of the reinforcing ribs 121, 121, 121. It is made by welding. The width W of the strip-shaped steel plate 122 is twice or more the thickness T of the reinforcing rib 121. Further, the strip-shaped steel plates 122, 122, 122 of the reinforcing body 120 are attached to be able to be inserted through the inner surface of the inner steel pipe 103 through a slight gap. At the time of manufacturing, after assembling the reinforcing body 120, the reinforcing body 120 is inserted and arranged from one side opening of the inner steel pipe 103, and the reinforcing body 120 is welded and fixed to the inner surface of the inner steel pipe 103 at the opening side where the welding rod reaches. After that, the non-shrink mortar 106 is filled inside. Further, as shown in FIG. 19, the end portion of the reinforcing rib 121 is fixed to the belt-shaped steel plate 122 by the welded portion 123. One of the reinforcing ribs 121, 121, 121 is positioned on the side of the reinforcing steel rods 104, 104, 104, which is a tensile region when a load is applied, and one apex 121S is positioned on the compression region side.

  As described above, this embodiment also has the same operations and effects as the above embodiments.

  Also, in this example, reinforcing ribs 121, 121, 121 having a triangular cross section are provided inside the inner steel pipe 103 having a circular cross section, and two vertices 121S of the reinforcing ribs 121, 121, 121 are provided in the tensile region of the steel pipe. Since the non-shrinking mortar 106, which is an internal cement mixture, is constrained in the cross section by the reinforcing ribs 121, 121, 121 inside the steel pipe 102, the compressive stress is improved, and the reinforcing ribs 121, Since there are ribs 121 connecting the two apexes 121S and 121S of 121, the tensile stress on the tensile region side is improved against the tensile force generated by bending, and the stress against the load can be effectively improved.

  FIG. 20 shows a fourth embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. In this example, concrete is provided below the protective fence 1. A protective surface 301 is provided. This concrete protective surface 301 is made of cast-in-place concrete with the lower parts of the columns 2 and 3 (on the slope Y) embedded. It can be received by the concrete protective surface 301.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, the number and arrangement of reinforcing steel bars can be selected as appropriate. Further, the unevenness of the reinforcing steel rod may be not only the screw-shaped one shown in the embodiment, but also unevenness due to the longitudinal protrusions, etc. If the adhesion between the reinforcing steel rod and the filler can be improved, various unevennesses are possible. Can be used.

It is a front view of the protection fence which shows Example 1 of this invention. It is a top view same as the above. It is a side view same as the above. It is a front view of the principal part of a protection fence same as the above. It is a top view of the principal part of a protection fence same as the above. It is a top view of the principal part of a terminal support | pillar same as the above. It is drawing of the principal part of a shock absorber same as the above, FIG. 7 (A) is a front view, FIG.7 (B) is a side view. It is sectional drawing of the principal part of a shock absorber same as the above. It is sectional drawing of a support | pillar same as the above. It is sectional drawing of the outer side steel pipe which fixed the reinforcement steel rod same as the above. FIG. 11 (A) is a front view, and FIG. 11 (B) is a side view. It is a side view of the protection fence which shows Example 2 of this invention. It is a longitudinal cross-sectional view which shows the joining state of a support | pillar same as the above. It is a plane sectional view showing a joined state same as the above. FIG. 4 is a cross-sectional view around the receiving tube portion. It is a top view of a receiving cylinder part same as the above. FIG. 17A is a plan sectional view and FIG. 17B is a longitudinal sectional view showing the lower end side of the lower part of the column. It is sectional drawing of the support | pillar which shows Example 3 of this invention. It is sectional drawing of the principal part of a reinforcement body same as the above. It is a side view of the protection fence which shows Example 4 of this invention.

Explanation of symbols

1 Guard fence 2 Terminal pipe support (support)
3 Intermediate pipe support (support)
2U Column upper part 2S Column lower part 4 Rope material 5 Wire mesh 6 Connecting rod 7 Protective surface 8 Moving layer 9 Non-moving layer
23 Shock absorber Y Slope Y1 Vertical hole

Claims (7)

In the collapsible sediment protection fence that prevents the fall of collapsible sediment, a column is set up at intervals, and a rope material is installed between these columns at intervals above and below, and a protective surface is provided. Collapse earth and sand protection fence. The collapsed earth protection fence according to claim 1, wherein the upper and lower rope members have a narrower vertical distance than the lower rope member. 3. The collapsed earth protection fence according to claim 1 or 2, wherein the support column protrudes from the moving layer and the lower part of the support column is built in the immovable layer. The collapsed earth protection fence according to any one of claims 1 to 3, wherein the support column is composed of a support column upper part and a support column lower part that are divided vertically. The collapsible earth and sand protection fence according to claim 4, wherein a receiving cylinder portion for inserting and fixing a lower end of the upper portion of the support column is provided on an upper side of the lower portion of the support column. The collapsed earth protection fence according to any one of claims 1 to 5, wherein upper portions of the columns are connected by a connecting rod. The rope material is gripped by a shock absorber, the shock absorber is connected to the support, and the rope material slides with respect to the shock absorber when a predetermined tensile force is applied to the rope material. The protective fence of any one of 1-6.

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