JP2009002023A - Prop for protective structure against avalanche and falling rock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prop for a protective structure against avalanche and falling rocks allowing a worker to transport and carry the prop into construction site easily and capable of improving the efficiency of the work at construction site accompanied with excavation and ensuring satisfactory strength in a connection section for connecting an upper part with a lower part of the prop. <P>SOLUTION: This prop 2 is constituted by connecting the lower part 2S with the upper part 2U of the prop and providing a plurality of PC steel bars 21, 21A continuously in the inside of the lower part 2S and the inside of the upper part 2U of the prop. By connecting the lower part 2S with the upper part 2U of the prop in this way and providing a plurality of PC steel bars 21, 21A continuously in the inside of them, satisfactory strength in the connection section can be ensured. By fixing the lower part 2S of the prop in an installation place, the prop 2 for a protective fence 1 being the protective structure can be erected. Furthermore, since thickness of the prop 2 is not increased in the connection part of the lower part 2S and the upper part 2U of the prop, size of diameter of a dug hole in which the prop 2 is inserted is not increased. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support for a protection body such as an avalanche or falling rock such as a protection fence.

  Conventionally, protective fences have been known that are constructed on slopes of mountainsides and receive falling rocks and snow, etc., to prevent falling and inflowing on roads, etc.For example, vertical holes are provided at intervals on slopes of mountainsides. There has been proposed a protective fence such as a rock fall (for example, Patent Document 1) in which pipe struts that are drilled and built in the vertical holes are arranged side by side, and a wire mesh is stretched along with a plurality of cables on each of the pipe struts.

  In addition, a protective fence in which a support net is installed in a plurality of vertical holes drilled at intervals on the setting surface, and a protection net is stretched together with a plurality of cable bodies that are installed with a vertical space between the support columns. (For example, Patent Document 2), or a filled steel pipe for protection structures such as rock fall and avalanche filled with non-shrink mortar which is a mixed material mixed with cement, and this filled steel pipe is fixed to the foundation (for example, Patent Document 3) It has been known.

  In addition, as a means to absorb impacts such as falling rocks by converting them into frictional energy, support columns are provided at predetermined intervals, and horizontal rope materials are moored in a state that allows horizontal sliding between each support column. Both ends of the cable are fixed, shielded between wires by a wire net hooked on a horizontal rope material, and an extra length portion formed by polymerizing the rope material in the middle of the horizontal rope material, and an extra length portion. A buffer that absorbs tension by extending the extra length of the horizontal rope material while maintaining a constant frictional force when a tension higher than the set tension is applied to the horizontal rope material due to the clamping device that clamps with a constant force A shock absorbing fence (for example, Patent Document 4 and Patent Document 5) in which a slab is formed has been proposed.

  In addition, in the shock absorbing pile, a buried cylindrical body, a pile main body inserted into the cylindrical body so that the upper part protrudes on the ground, and a space between the cylindrical body and the pile main body are filled. There exist some (for example, patent documents 6) provided with the filler.

In addition, in order to improve the strength of the pillars of this type of rockfall and avalanche protective body, a plurality of reinforcing bars in the length direction are provided inside a single steel pipe having a circular cross section, and these reinforcing bars are arranged in the tensile region of the steel pipe. There is a support (for example, Patent Document 7) provided on the side.
JP-A-7-197423 JP 2002-115213 A JP 2002-266321 A JP-A-6-197423 JP-A-6-33709 JP-A-9-203036 JP 2002-266321 A

  In the protective fence of Patent Document 3, natural disasters such as falling rocks and avalanches can be suppressed by effectively receiving snow and avalanches by the protective fence constructed on the slope. In the absorption fence, the shock can be absorbed by sliding of the buffer portion formed in a part of the horizontal rope material before the impact is transmitted to the support, and the load load of the support can be reduced as compared with the conventional case.

  By the way, even if it provides a buffer part, in this kind of guard fence, in order to improve the strength of a support | pillar, the intensity | strength of a support | pillar greatly needs to improve attachment strength with support | pillar itself. For this reason, the lower part of a support | pillar is built in the vertical hole formed in the foundation, and predetermined attachment strength is obtained.

  And depending on the setting conditions of the protective fence, the pillar may be long.For example, in an avalanche prevention fence, the upper fence height corresponding to snow accumulation and the lower part corresponding to this are required, and the pillar is long. Become. On the other hand, when a steel pipe or the like is used as the material for the support, plating is performed from the aspect of rust prevention.

  In such plating treatment, so-called soaking is performed in which a support is immersed in a plating tank, but there are few plating layers capable of processing a long support, and if the support becomes longer, it is disadvantageous in terms of manufacturing process and manufacturing cost. However, all of the above-mentioned patent documents use an integrated object for a support or a pile, and such a problem is expected.

  In addition, since the support is immersed in the high-temperature plating solution in the plating tank, if the support is distorted due to thermal effects, the product error increases. In addition, the long support column is easily limited by the in-vehicle dimensions, and is also easily restricted at the time of carrying in the field, so that the workability is likely to be deteriorated.

  On the other hand, when viewed from the manufacturing side, the length of the column often varies depending on the conditions and place where the column is used. In order to change according to the site, it is not possible to cope with standard dimensions, and it is necessary to manufacture struts of different lengths each time.

  For this reason, there is a problem in that the support column is produced in a large variety and in small quantities, and a standard product cannot be manufactured in advance, resulting in a delay in delivery and an increase in cost.

  By the way, in patent document 6, although the technique which inserts a pile main body in a cylindrical body is disclosed, when a cylindrical body larger in diameter than a pile main body is used in this way, an excavation hole is matched to this cylindrical body. There is a problem that man-hours and construction costs increase compared to the case of using a normal pile body.

  Furthermore, in Patent Document 7, it is possible to counter the tensile force with a reinforcing bar, but when reinforcing the central side in the length direction with a reinforcing bar with a long column, it has at least a length from the end of the column to the central side. Reinforcing bars must be used, and structural members may be wasted.

  Therefore, the present invention is easy to transport and carry the struts, can improve workability on site with excavation, and can ensure the strength of the connecting portion between the upper portion of the strut and the lower portion of the strut The purpose is to provide a support column for protective bodies such as rockfalls.

  According to the first aspect of the present invention, a plurality of rod-shaped steel materials are continuously connected to the inside of the lower part of the support and the upper part of the support in the support that connects the lower part of the support fixed to the foundation and the upper part of the support provided at the upper part of the support. It is provided.

  According to a second aspect of the present invention, the rod-shaped steel material is provided along the inner surface side of the lower column and the upper column.

  Further, the invention of claim 3 is provided with a thicker tube inside the rod-shaped steel material, continuously inside the lower column and inside the upper column, and thicker than the lower column and the upper column. .

  According to the invention of claim 4, a plurality of the rod-shaped steel members are fixed to the lower portion of the support column and the upper portion of the support column, respectively, and the other reinforcing bar is disposed in the length direction between the rod-shaped steel materials of the lower portion of the support column and the upper portion of the support column. It is inserted from.

  The invention according to claim 5 is such that the lower column and the upper column are joined by a bonding agent filled between the lower column and upper column and the thick tube.

  According to a sixth aspect of the present invention, the PC steel material is disposed on the tension region side of the cross section of the column.

  According to the structure of Claim 1, the support | pillar lower part and the support | pillar upper part are connected, and the intensity | strength of a connection location is securable by providing several rod-shaped steel materials in the inside continuously. And the support | pillar of a protection body can be erected by fixing the lower part of the support | pillar to an installation place. Further, the strut does not become thicker at the connecting portion between the lower strut and the upper strut, and therefore the excavation hole into which the strut is inserted does not have a large diameter.

  In this way, a long column can be transported and carried in divided into a column lower part and a column upper part, and installation workability at the site can be improved. Further, in the case where the support is plated, the upper part of the support and the lower part of the support are shorter than the single body, so that the plating process can be easily performed. Furthermore, the upper part of a support | pillar can be standardized and manufactured beforehand by dividing | segmenting into a support | pillar upper part and a support | pillar lower part.

  Moreover, according to the structure of Claim 2, the cross-sectional performance of a support | pillar improves by arrange | positioning a rod-shaped steel material to the inner surface side.

  Moreover, according to the structure of Claim 3, since a thick tube is located in the connection location of a support | pillar lower part and a support | pillar upper part, a support | pillar lower part and a support | pillar upper part can be connected firmly.

  According to the configuration of claim 4, by inserting the PC steel material fixed to the other between the PC steel materials fixed to one side, the PC steel materials are engaged with each other at intervals, and the upper portion of the support column and the support column The connection point with the lower part is reinforced.

  Moreover, according to the structure of Claim 5, a support | pillar lower part and a support | pillar upper part can be joined with predetermined intensity | strength through a thick tube with a joining agent.

  Moreover, according to the structure of Claim 6, when tensile force is added to the connection location of a support | pillar by avalanches, falling rocks, etc., since PC steel material opposes this, the intensity | strength with respect to an impact can be improved.

  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 the configurations described below are not necessarily essential requirements of the present invention. In each of the examples, by using a different avalanche / falling rock protector support column, conventional avalanche / fall rock protector support columns were obtained, and the avalanche / fall rock protector column was described respectively. To do.

  Embodiment 1 of the protector according to the present invention will be described below with reference to FIGS. Protective fences 1 such as falling rocks and avalanches as protective bodies are arranged in parallel with a plurality of supports 2, 2... And provided with horizontal rope members 3, 3. A space between the support columns 2, 2... Is closed by a net 4 serving as a protective surface.

  Reference numeral 5 in the figure denotes a reserve rope member that connects the upper portion of the support column 2 and the slope Y on the front side of the guard fence 1. One end of the reserve rope member 5 is connected to the upper portion of the support column 2, The other end of 5 is fixed to the slope Y by an anchor 6.

  Next, the details of the support column 2 will be described. The support column 2 is formed by connecting a support column upper part 2U and a support column lower part 2S. As an example, a filled steel pipe 11 is used for the support column lower part 2S and the support column upper part 2U. It is done.

  As shown in FIG. 9 and the like, the filled steel pipe 11 is fixed to the steel pipes 12U and 12S by inserting and arranging a reinforcing body 13 having a substantially triangular cross section in the steel pipes 12U and 12S having a circular cross section as the main body of the columns 2U and 2S. Then, the inside is filled with a filler 14 such as a non-shrink mortar and cured. The reinforcing body 13 has three reinforcing ribs 15, 15, 15 made of plate material arranged in a substantially equilateral triangle, and strip-shaped steel plates 16, 16, 16 are placed on the top portions 15 S, 15 S, 15 S of the reinforcing ribs 15, 15, 15. It is welded. Further, the width W of the strip steel plate 16 is at least twice the thickness T of the reinforcing rib 15. The strip steel plates 16, 16, 16 of the reinforcing body 13 are attached so as to be able to be inserted through the inner surfaces of the steel pipes 12U, 12S through a slight gap. Further, the reinforcing ribs 15, 15, 15 are provided with through holes 18 to facilitate filling of the filler 14. Note that the filler 14 is not shown in FIGS.

  The steel pipe 12U and the steel pipe 12S have the same configuration. The steel pipe 12U is used for the upper column 2U, and the steel pipe 12S is used for the lower column 2S.

  At the time of manufacture, after assembling the reinforcing body 13, the reinforcing body 13 is inserted and arranged from one side opening of the steel pipes 12U and 12S, and the reinforcing bodies 12U and 12S are placed on the inner surface of the steel pipe 12 on the opening side where the welding rods reach. After welding and fixing, the non-shrink filler 14 is filled inside. Further, as shown in FIG. 8, the end portion of the reinforcing rib 15 is fixed to the strip-shaped steel plate 12 by the welded portion 17.

  As shown in FIG. 5 and the like, a plurality of PC steel bars 21, 21A, which are rod-shaped steel members, are fixed along the inner surface of the steel pipe 12S at the tip of the lower column 2S, and the tips of these PC steel bars 21, 21A are fixed. It protrudes from the tip of the steel pipe 12S. In addition, the dimension of the protrusion part of PC steel bars 21 and 21A is about 1/3 of the full length. The PC steel rod 21 is provided on the tension region side of the support column 2, and the PC steel rod 21A is provided on the compression region side of the support column 2, and the PC steel rod 21 and the PC steel rod 21A are the same. It is a configuration.

  The PC steel rods 21 and 21A are fixed to the outer periphery of the steel pipe inner lid 22 at a position that is approximately one third of the length from the base end side. A positioning groove 23 into which 21A is inserted is formed at a predetermined position, and the PC steel rods 21, 21A are fixed by welding or the like in the positioning groove 23 having a substantially semicircular shape.

  In addition, the distal end of the reinforcing body 13 is welded and integrated with the base end side surface of the steel pipe inner lid 22, and in this case, the distal end of the reinforcing rib 15 of the reinforcing body 13 is subjected to groove processing to form the steel pipe inner lid 22 and Weld. Thereby, the PC steel bars 21 and 21A are fixed to the reinforcing body 13 via the steel pipe inner lid 22. Further, arc plate-like spacers 24 and 24A are fixed to the base ends of the PC steel bars 21 and 21A, and the positioning grooves 23 are provided on the outer edges of the spacers 24 and 24A. In the positioning grooves 23, welding is performed. It is fixed by. The spacers 24 and 24A are fixed to the reinforcing body 13.

  And the reinforcement body 13 which integrally provided the PC steel rods 21 and 21A was inserted in the steel pipe 12S, and the tip of the PC steel bars 21 and 21A protruded from the tip of the steel pipe 12S by one third of the total length. Thus, the base end of the reinforcing body 13 is located at the base end of the steel pipe 12S. The steel pipe inner lid 22 and the inner surface of the steel pipe 12S are welded from the distal end side of the steel pipe 12S, and the distal end side and the proximal end side in the steel pipe 12S are partitioned by the steel pipe inner lid 22.

  7 and 10, there is a gap between the inner circumference of the steel pipes 12S and 12U and the outer circumference of the steel pipe inner lid 22 for easy explanation, but the gap is actually closed by welding. .

  And the said filler 14 is filled into the base end side from the steel pipe inner cover 22 in the steel pipe 12S. One of the vertices of the reinforcing ribs 15 and 15 of the reinforcing body 13 is disposed on the compression region side, and the remaining two vertices are disposed on the tension region side.

  On the other hand, the upper column 2U has the same configuration as the lower column 2S except that the arrangement of the positioning groove 23A of the steel pipe inner lid 22 and the spacers 24, 24A is different and the number of the PC steel bars 21, 21A is different. That is, in the lower column 2S, the positioning groove 23 is located at the top of the tension region side and the compression region side with the PC steel bars 21 and 21A, and both sides of the top of the PC steel bars 21 and 21A in the circumferential direction. A plurality of PC steel bars 21 and 21A are arranged at predetermined intervals respectively, and in this example, three PC steel bars 21 and 21A are arranged on both sides in the circumferential direction. On the other hand, in the upper part 2U of the support, three PC steel bars 21 and 21A are arranged on both sides of the top part so as to be positioned between the PC steel bars 21 and 21A of the lower part of the support, and corresponding to this position, A positioning groove 23A is formed in the steel pipe inner lid 22 and the spacers 24, 24A.

  Note that the base end of the PC steel rod 21A arranged at the top in the compression region is up to the steel pipe inner lid 22.

  A thick tube 31 is inserted into the connecting portion between the lower column 2S and the upper column 2U. The thick tube 31 has a through hole 31A and is thicker than the steel tubes 12S and 12U. Has a thickness more than twice that of the steel pipes 12U, 12S, and has an outer diameter along the PC steel bars 21, 21A. Further, compared to the total length from the pipe ends of the steel pipes 12U and 12S to the tip surfaces of the steel pipe inner lids 22 and 22, the thick pipe 31 is formed slightly shorter and in a connected state, A gap is formed between both ends of the thick tube 31 and the front end surfaces of the steel tube inner lids 22 and 22. Further, lids 32, 32 for closing the inside are provided at both ends of the thick tube 31, so that a bonding material to be described later does not enter the inside.

  Further, the steel pipes 12S and 12U of the support lower part 2S and the support upper part 2U are provided with bonding agent injection holes 33 and 33 on the front end side of the steel pipe inner lids 22 and 22, respectively. It is at a position 180 degrees away in the circumferential direction. A pipe material such as a hose (not shown) is connected to each of the injection ports 33 and 33, and after filling the bonding agent 34, a plug as a connection portion (not shown) is screwed and closed.

  As the filler 34, the base range is an epoxy resin, preferably an epoxy adhesive using a bisphenol A type epoxy resin, and is a two-part, wet surface curing type consisting of a main agent and a curing agent. Is used. As described above, by using a wet surface curing type epoxy adhesive as the bonding agent 34, it is possible to perform the construction even in a site where moisture treatment or the like is difficult.

  Next, the connection operation | work of the said support | pillar 2 is demonstrated. First, the thick tube 31 is inserted into one of the support lower part 2S and the support upper part 2U. For example, when the thick tube 31 is inserted into the distal end side of the lower column 2 </ b> S, the PC steel bars 21 and 21 </ b> A protruding from the distal end of the steel tube 12 </ b> S are substantially along the outer surface of the thick tube 31. On the other hand, the PC steel bars 21 and 21A of the upper column 2U are aligned between the PC steel bars 21 and 21A of the lower column 2S, and the PC steel bars 21 and 21A of the upper column 2U are inserted into the lower column 2S. Then, the steel pipes 12U and 12S are inserted to a position where they abut. Thereafter, the hose is used to fill the bonding agent 34 between the steel pipes 12S, 12U and the thick pipe 31 from one inlet 33, and to release the internal air from the other inlet 33.

  Next, the construction method and the like of the protective fence 1 will be described focusing on the support column 2. 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. 1 and the like, a mounting hole is provided on the slope Y of the mountain where the protective fence 1 is installed. 51 is drilled, and a boring is used for the drilling, and the support lower part 2S is inserted into the mounting hole 51 and built.

  If there is a gap between the mounting hole 51 and the lower column 2S, the lower hole 2S is fixed to the installation place by filling the gap 52 with the filler 52 for the mounting hole. Thus, in the construction of the support column 2, the long support column 2 can be constructed separately from the support column lower part 2S and the support column upper part 2U, and the installation workability at the site can be improved. Further, in the case of plating the column 2 before filling with the filler 14, the column upper portion 2U and the column lower portion 2S are shorter than the integrated body, 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 thick tube 31 is inserted into the upper end of the support lower part 2U, the support upper part 2U is lowered toward the support lower part 2S, and the tips of the steel pipes 12U and 12S are brought into contact with each other to be connected. Then, the bonding agent 34 is filled from the injection port 33.

  As the filled bonding agent 34 is cured, the support upper part 2U and the support lower part 2S are integrated. In this case, a pulling force can be obtained by bonding with the bonding agent 43, and by using a wet surface curing type epoxy adhesive as the bonding agent 43, it is possible to perform the construction 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 support 2 is divided into the support lower part 2S and the support upper part 2U and manufactured, it is not subject to restrictions such as plating, and is manufactured in a place suitable for work. And a stable product (post 2) can be manufactured.

  As described above, in this embodiment, in accordance with the first aspect of the present invention, a plurality of bar shapes are provided in the support column 2 that connects the support column lower portion 2S fixed to the base slope Y and the support column upper portion 2U provided on the support column lower portion 2S. Since PC steel bars 21 and 21A, which are steel materials, are continuously provided inside the lower column 2S and the upper column 2U, the lower column 2S and the upper column 2U are connected to each other, and a plurality of PC steel rods are continuously formed inside these columns. By providing 21 and 21A, the strength of the connecting portion can be ensured. And the support | pillar 2 of the protection fence 1 which is a protection body can be erected by fixing the support | pillar lower part 2S to an installation place. Further, the support column 2 does not become thick at the connecting portion between the support column lower part 2S and the support column upper part 2U, and therefore the excavation hole into which the support column 2 is inserted does not have a large diameter.

  In this way, in the present embodiment, the long column 2 can be transported and carried in 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 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 this way, in this embodiment, the PC steel bars 21 and 21A, which are bar-shaped steel materials, are provided along the inner surfaces of the column lower part 2S and the column upper part 2U so as to correspond to the second aspect. Can be improved.

  In this way, in this embodiment, corresponding to claim 3, inside the PC steel bars 21, 21 </ b> A which are bar-shaped steel materials, the inside of the column lower part 2 </ b> S and the inside of the column upper part 2 </ b> U are continuously provided. Since the thick tube 31 is thicker than the 2S and the upper column 2U, the thick tube 31 is located in the connecting portion between the lower column 2S and the upper column 2U, so the lower column 2S and the upper column 2U are firmly Can be linked to.

  In this way, in this embodiment, corresponding to claim 4, a plurality of PC steel bars 21 and 21A, each of which is a rod-shaped steel material, are fixed to the lower column 2S and the upper column 2U, and the lower column 2S and the upper column 2U are fixed. Since the other PC steel bar 21, 21A is inserted between the PC steel bars 21, 21A from the length direction, the PC steel bar fixed to the other side between the PC steel bars 21, 21A fixed to the other side By inserting 21 and 21A, as shown in FIG. 4 and the like, both PC steel bars 21 and 21A are engaged with each other at an interval, and the connecting portion between the upper column 2U and the lower column 2S is reinforced.

  In this way, in this embodiment, the lower column and the upper column are joined by the bonding agent 34 filled between the lower column 2S and the upper column 2U and the thick tube 31 corresponding to claim 5. The support 34 can join the support lower part 2S and the support upper part 2U with a predetermined strength through the thick tube 31.

  In this way, in this embodiment, corresponding to claim 6, the PC steel bars 21 and 21A are arranged on the tensile region side of the cross section of the support column 2, so that the connection of the support column 2 by avalanches, falling rocks, etc. When a tensile force is applied to a location, the PC steel rods 21 and 21A counteract this, so the strength against impact can be improved.

  Further, as an effect of the embodiment, since the steel pipe inner lid 22 and the spacers 24, 24A as positioning means for positioning the plurality of PC steel bars 21, 21A are provided, the plurality of PC steel bars 21, 21A are positioned, and a plurality of PC steel bars 21, 21A are positioned. The PC steel bars 21 and 21A can be engaged with each other so that the lower column 2S and the upper column 2U can be easily connected.

  In addition, as an effect on the embodiment, an epoxy resin using an epoxy resin, preferably a bisphenol A type epoxy resin, is used for the base range, and is a two-part, wet surface-curing type comprising a main agent and a curing agent. Since a material is used, the on-site adhesion can be secured, and the bonding strength can be obtained faster than mortar and the like.

  Further, as an effect of the embodiment of the filled steel pipe 11, the support upper part 2U and the support lower part 2S are composed of the filled steel pipe 11 provided with the reinforcing body 13, and the cross section of the steel pipes 12U and 12S is reinforced with a triangular cross section. Since the ribs 15, 15, and 15 are provided inscribed, and the two apexes 15S of the reinforcing ribs 15, 15, and 15 are arranged on the tensile region side of the steel pipe, the cross section is provided by the reinforcing ribs 15, 15, and 15 inside the steel pipe 12. In this case, the filler 14 which is the cement mixture inside is restrained, the compressive stress is improved, and the rib 15 which connects the two vertices 15S and 15S of the reinforcing ribs 15 and 15 is provided on the tensile region side. The tensile stress on the tensile region side is improved against the tensile force, and the stress with respect to the load can be effectively improved.

  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, a thick tube may be inserted into the upper part of the support first and then connected to the lower part of the support. Moreover, in the Example, although the example which built the support | pillar in natural grounds, such as a slope, the support | pillar may be built in the installation surface which provided the foundations, such as concrete.

It is sectional drawing of the protector which shows one Example of this invention. It is sectional drawing of the connection location of a support | pillar upper part and a support | pillar lower part same as the above. It is a sectional view of a thick tube same as the above. It is AA sectional drawing of FIG. 2 same as the above. It is sectional drawing of a support | pillar upper part or a support | pillar lower part same as the above. FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. FIG. 6 is a cross-sectional view taken along the line CC of FIG. FIG. 6 is a sectional view taken along the line DD of FIG. It is sectional drawing of a filling steel pipe same as the above. It is sectional drawing of the principal part of a support | pillar upper part same as the above.

Explanation of symbols

1 Guard fence (protector)
2 Prop 2U Prop upper part 2S Prop lower part
11 Filled steel pipe
12U, 12S steel pipe
21 PC steel bar (bar-like steel, tension area side)
21A PC steel bar (bar-shaped steel, compression zone side)
31 Thick tube
32 lid
34 Bonding agent

Claims (6)

In a column connecting a column lower part fixed to a foundation and a column upper part provided at an upper part of the column lower part, a plurality of rod-shaped steel materials are continuously provided inside the column lower part and the column upper part. A prop of protective body such as avalanche and rock fall. 2. The support column for an avalanche / falling rock protection body according to claim 1, wherein the rod-shaped steel material is provided along the inner surface side of the support column lower part and the support column upper part. 3. An avalanche tube according to claim 2, wherein a thicker tube is provided inside the rod-shaped steel material and continuously from the inside of the lower part of the support and the inside of the upper part of the support, and thicker than the lower part of the support and the upper part of the support. Prop of protective body such as rock fall. A plurality of the steel bars are fixed to the lower part of the support and the upper part of the support, respectively, and the other reinforcing bar is inserted from the length direction between the lower part of the support and the upper part of the support. Paragraph of protective body such as avalanche and falling rock according to Item 3. 5. The support column for an avalanche / falling rock protection body according to claim 3, wherein the support column and the support column are bonded to each other with a bonding agent filled between the column support and the support column. . The said PC steel material is arrange | positioned at the tension | pulling area | region side of a support | pillar cross section, The support | pillar of protection bodies, such as an avalanche and falling rock, of any one of Claims 2-5 characterized by the above-mentioned.

Images