JP2006283523A - Column structure and column with guardrail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple column structure improving absorption performance of collision energy. <P>SOLUTION: In the column structure, an inner steel pipe 5 or shaped steel 11 is provided inside an outer steel pipe 4 for a column separately at an interval from the outer steel pipe 4. Part of a space or a whole space surrounded with the outer steel pipe 4 and the inner steel pipe 5 or the shaped steel 11 is filled with slag or sediments 8. The inner steel pipe 5 or the shaped steel 11 is provided for part of or overall axial directions of the inside of the outer steel pipe 4. In this column with guardrails, single shaped steel or a plurality of pieces of shaped steel are, as guardrails, mounted to the outer steel pipe 4 in the column structure in right-angled directions with respect to the outer steel pipe 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a strut structure having a collision energy absorption function and a strut with a guard rail used in road structures and railway structures such as struts and struts with guard rails.

  Conventionally, as a support provided with a collision energy absorbing function, (1) a structure in which sand is tightly packed in a support is known (for example, see Patent Document 1).

  In addition, (2) it is possible to fix the projecting state by inserting a support column so that it can be moved up and down in a sheath pipe buried in the ground, raising the support column and projecting it to the ground and then turning. In the column for stopping the car, a locking piece is provided at the upper part of the inner peripheral surface of the sheath tube, a lifting groove and a locking groove are provided on the outer peripheral surface of the large-diameter portion provided at the lower part of the column, and a communication groove is provided at the lower end side thereof There is also known a vehicle stop strut that is provided and formed and rotated after the strut is raised so that the locking piece passes through the elevating groove, and the locking piece is engaged with the locking groove and fixed. (For example, refer to Patent Document 2). In such a structure, although the raising / lowering operation can be performed, there is a problem in that the lower structure of the support and the sheath upper structure are complicated and the structure of the support becomes complicated.

  Also, (3) a mounting body into which an anchor bolt is inserted and a columnar lane separator are supported by a block body made of a synthetic resin that is elongated in one direction so as to be installed along a median strip of a road. A support hole is drilled, and an anchor bolt inserted into the mounting hole is screwed to an anchor nut embedded in the road surface to attach the block body to the road surface, and the lower portion of the lane marking is inserted into the support hole. There is also known a block for a median strip in which a lane separator is supported upright on a block body (see, for example, Patent Document 3).

(4) In a collision energy absorbing member that absorbs collision energy at the time of automobile collision among metal automobile body frame structural members, a partition wall is formed by one or a plurality of circular tubes and square tubes inserted inside the circular tube. A collision energy absorbing member having a formed closed cross-sectional shape is also known (see, for example, Patent Document 4).
Japanese Patent Application Laid-Open No. 9-242034 Japanese Patent Laid-Open No. 2003-96731 JP 2002-146730 A JP 2003-137129 A

  As described in (1) above, there is a problem that there is a limit to the energy absorption performance at the time of automobile collision only by filling the pillar with sand, and in the case of using synthetic resin as in (3), the collision energy absorption performance. When the outer steel pipe and the inner steel pipe are in contact with each other as in the above (4), there is a problem that these collisions are impossible and there is a limit to the absorption performance of the collision energy.

  It is an object of the present invention to provide (A) a strut structure and a guard rail-supported column that can improve the absorption performance of collision energy more than the conventional case, and (B) have a simple structure.

  In order to advantageously solve the above-described problem, in the support structure of the first invention, in the support structure having a collision energy absorbing function, an inner steel pipe or a shaped steel is in contact with the outer steel pipe inside the outer steel pipe for the support. It is characterized by being provided with an interval so as not to.

  Further, in the second invention, in the column structure of the first invention, a slag, earth or sand, urethane, rubber, wood or a part of or a whole space surrounded by the outer steel pipe and the inner steel pipe or the shape steel It is characterized in that it is filled with at least one of the substances made of stone.

  According to a third aspect of the invention, in the support structure of the first or second aspect of the invention, the inner steel pipe or the shaped steel is provided on a part of the axial direction inside the outer steel pipe or substantially over the entire length. And

  According to a fourth aspect of the present invention, in the support structure according to the first to third aspects, when the outer steel pipe is deformed by an external force, the outer steel pipe is sequentially supported by the inner steel pipe or the shape steel arranged on the inner side.

  Moreover, in the support | pillar with a guard rail of 5th invention, a single shape steel or several shape steel is used as a guard rail in the orthogonal | vertical direction to the said outer steel pipe in the outer steel pipe in the support | pillar structure in any one of 1st invention-4th invention. It is characterized by being installed.

  According to the present invention, the outer steel pipe and the inner steel pipe or the shaped steel arranged inside thereof are in the initial state a strut structure that is laterally spaced apart, that is, the outer steel pipe and the inner steel pipe ( (Or shaped steel) shows three behaviors by not contacting: (1) deformation of the outer steel pipe, (2) collision between the outer steel pipe and the inner steel pipe (or shape steel), and (3) deformation of the inner steel pipe. As a result, the collision energy absorption performance can be enhanced. Furthermore, by providing at least one of slag, earth and sand (especially sand), urethane, rubber, wooden or stone in these spaces, the impact is transmitted to slag and earth and sand, and slag and earth and sand ( For example, at least any one of materials such as sand), urethane, rubber, wood or stone collides and dissipates, so that the absorption performance can be further improved. Deformation (especially buckling) of outer and inner steel pipes (or shaped steel) by providing at least one of slag, earth and sand, urethane, rubber, wood or stone inside the outer steel pipe ) And a sound absorption effect. In addition, when the outer steel pipe is deformed by an external force such as a collision of a vehicle or the like, the outer steel pipe is supported by the inner steel pipe or the shape steel sequentially arranged on the inner side, so that it can be supported while efficiently absorbing the collision energy. Furthermore, in the strut structure of the present invention, or in a strut with a guard rail in which a single section or a plurality of sections is attached in a direction perpendicular to the outer steel pipe, a guard rail such as a strut or a single section or a plurality of sections is interposed. Thus, it is possible to absorb the collision energy of the automobile or the like and to support the buffer by the support structure.

    Next, the present invention will be described in detail based on the illustrated embodiment.

  1, FIG. 2 (a), FIG. 3 and FIG. 4 show the column structure of one embodiment of the present invention, and FIG. 1 (a) is a longitudinal front view showing a state where the upper column is raised, (B) is a vertical front view which shows the state which stored the upper support | pillar. FIG. 2A is a cross-sectional view taken along line AA in FIG.

  This form shows a retractable support column 20, and the retractable retractable support column 20 is a steel or concrete lower casing tube having an upper support column 1 that can be moved up and down and a storage recess 2. 3. A bottom plate 3 a is provided at the bottom of the lower sheath tube 3.

  The upper support column 1 includes a circular outer steel pipe 4 and a circular inner steel pipe 5, and the inner steel pipe 5 is placed in the outer steel pipe 4 in a state where the outer peripheral portion of the lower end thereof is fixed to the steel bottom plate 6 by welding. It arrange | positions concentrically and the baseplate 6 and the outer steel pipe 4 are being fixed by welding etc. In the present invention, it is important that the inner surface of the outer steel pipe 4 and the outer surface of the inner steel pipe 5 (in the embodiment described later, shaped steel) are spaced apart.

  At the lower part of the inner steel pipe 5 and the outer steel pipe 4, a horizontal through hole having a horizontal center axis intersecting the vertical axis centers of the inner steel pipe 5 and the outer steel pipe 4 in the vertical direction is provided so as to penetrate these horizontal through holes. A steel tubular fixing member 7 is disposed through the steel tubular fixing member 7 and the steel tubular fixing member 7 and the outer steel pipe 4 are fixed by welding. Moreover, the upper end part of the outer steel pipe 4 is fixed by welding etc. as needed by screw-fitting the cap 4a.

  The end portion of the steel tubular fixing member 7 is appropriately fixed from the outside of the outer steel pipe 4 by welding or the like, and the steel tubular fixing member 7 and the inner steel pipe 5 are attached to and detached from the upper end portion of the outer steel pipe 4 as described above. In the case of a possible lid shape, the inner steel pipe 5 and the steel tubular fixing member 7 are fixed from the inside of the outer steel pipe 4 by welding or the like.

  In the illustrated form, the inner steel pipe 5 is provided over almost the entire length in the vertical direction of the space in the outer steel pipe 4, but the inner steel pipe 5 is an intermediate part such as the center in the vertical direction of the space in the outer steel pipe 4. That is, the inner steel pipe 5 may be provided in a part of the space in the vertical direction inside the outer steel pipe 4, or the inner steel pipe 5 may be provided continuously over substantially the entire vertical space. In the form in which the lower part of the inner steel pipe 5 is fixed to the bottom plate 6, the inner steel pipe 5 is raised from the bottom plate 6. The lower part of the inner steel pipe 5 is fixed to the outer steel pipe 4 via the bottom plate 6 or the cylindrical fixing member 7, and the upper part is a cantilever type with a free end.

  In the illustrated embodiment, the space between the inner surface of the outer steel pipe 4 and the outer surface of the inner steel pipe 5 and the inner space of the inner steel pipe 5 are at least any of materials made of slag, earth and sand, urethane, rubber, wood or stone. The single substance 8 is filled as a shock absorbing material, a shock transmission material, a member that suppresses deformation of the outer steel pipe 4 or the inner steel pipe 5 (or a shape steel described later), and a sound absorbing member.

  The inner steel pipe 5 may be a square steel pipe 9 as shown in FIG. 2B, or may be a grooved steel 10 instead of the inner steel pipe 5 as shown in FIG. In the case of the shape steel 11 such as the square steel pipe 9 or the grooved steel 10, the lower end portion is fixed to the bottom plate 6 by welding. Further, in the case of the grooved steel 10 as the shape steel 11, a horizontal through hole is provided so as to penetrate the web 11a, and the tubular fixing member 7 is disposed so as to penetrate the horizontal through hole of the web 11a.

  The inner wall of the space such as the storage recess 2 provided in the lower sheath tube 3 embedded in the ground such as the median separation zone or the road belt 12 or the like applies the impact force generated at the time of the automobile collision to the upper support column 1 and the lower sheath tube 3. It is desirable that the wall of the storage space, which is the inner peripheral surface of the storage hole provided in the ground, is made strong so that it can be transmitted to the ground or the road belt 12 via the base and the support pressure by the steel pipe can be transmitted. The wall material for forming the storage hole is preferably a steel storage lower sheath tube 3 having a larger diameter than the outer steel tube 4 or a concrete support wall. In addition, as the insertion length into the storage space below the upper support column 1, the cylindrical fixing member 7 and the cylindrical fixing member 7 are connected to the tubular support member 7 so as to ensure an embedding length of about 1/5 or more of the entire length of the upper support column 1 so as to ensure support pressure. The support member 14 to be inserted is installed on the upper column 1.

  At the upper end portion of the outer steel pipe 4, there is a suspension member 15 for pulling up again after dropping the outer steel pipe 4 in order to store it. The suspension member 15 is configured such that the top end of the suspension member 15 can be stored at the level of the road belt 12 so that the upper support column 1 is settled in the storage space and does not become an obstacle to a vehicle traveling on the road surface. . In addition, a concave portion may be provided in the upper end portion of the outer steel pipe 4 so that the suspension member 15 does not protrude from the upper end portion of the outer steel pipe 4 so that the upper end of the suspension member 15 does not protrude from the upper surface of the outer steel pipe 4.

  As described above, the cylindrical fixing member 7 is fixed to the outer steel pipe 4, and a small-diameter steel pipe 7a can be used as shown in FIG. 9 (a), or FIG. 9 (b). A square steel pipe 7b may be used as shown, or a cylindrical fixing member 7 such as a flat rectangular cross-section member 7c may be used as shown in FIGS. 9 (c) and 10 (a). . Alternatively, as shown in FIG. 10 (b), a short cylindrical fixing member 7d is welded to the lateral through-holes of the outer steel pipe 4 and the inner steel pipe 5 at both ends in the radial direction of the outer steel pipe 4 and the inner steel pipe 5, respectively. It may be fixed.

  In the state where the cylindrical fixing member 7 in the upper support column 1 is at a level higher than the ground level, the support member 14 having a cross section smaller than the inner diameter of the cylindrical fixing member 7 is penetrated into the cylindrical fixing member 7. By placing both ends of the support member 14 disposed and projecting outward in the radial direction of the upper column 1 on rollers 16 such as a rod-like member interposed on the upper surface of the ground, the upper column 1 is predetermined via the support member 14. Supporting the elevated level of. The roller 16 makes it easy to pull out or insert the support member 14 as shown by arrows in FIGS.

  Therefore, the own weight of the upper column 1 is transmitted to the ground via the cylindrical fixing member 7, the support member 14 and the rollers 16. Since the support member 14 is not a member that acts greatly at the time of a collision of an automobile or the like, it is only necessary to be able to resist only the weight of the upper support column, and therefore it is not necessary to have a large cross-sectional shape.

  The support member 14 is composed of a reinforcing bar, a round bar, or a flat plate, and is provided with a ring-shaped grip portion 17 for inserting or pulling out at one end portion of these members. When the support member 14 is in close contact with the cylindrical fixing member 7 and it is difficult for the support member 14 to operate, as shown in FIG. 12, the cylindrical fixing member 7 and the support member 14 are obliquely arranged with respect to the ground surface. By doing so, the vertical force by the dead weight of the upper support | pillar 1 or the supporting member 14 can be reduced. In such a form, the outer steel pipe 4 and the inner steel pipe 5 (or the shaped steel, etc.) are provided with inclined horizontal through holes of different levels, and the cylindrical fixing member 7 is arranged over these, and the outer steel pipe 4 is welded or the like. And so on.

  As shown in FIG. 11, the support member 14 itself may have a wheel 18 instead of the roller 16. In this case, the wheel 18 can be inserted through the internal space through which the cylindrical fixing member 7 passes. It is necessary to make it a large through-hole. If the support member 14 is disposed at an inclination or the wheels 18 are provided on the support member 14, the insertion or withdrawal operation of the support member 14 can be facilitated.

  The support member 14 may be a reinforcing bar or a reinforcing bar in terms of simplifying the support structure and reducing the adhesion area between the cylindrical fixing member 7 and the support member 14 and facilitating the insertion and extraction of the support member 14. It is desirable to use a rod-shaped member made of a steel rod or the like.

  As shown in FIG. 10 (b), a plurality of cylindrical fixing members 7 may be provided partially on both sides in the radial direction so as to extend over the outer steel pipe 4 and the inner steel pipe 5, and the upper strut 1 A plurality of support members 14 supporting the above may be installed. In the case where a plurality of the cylindrical fixing members 7 or the support members 14 are provided, although not shown, they may be provided at intervals in the circumferential direction of the outer steel pipe 4 and the inner steel pipe 5.

  5 and 6 show a column structure according to another embodiment of the present invention. The difference from the above embodiment is that the outer steel pipe 4 or the inner steel pipe 5 is made of slag, earth or sand, or urethane. However, the structure is the same as that of the above embodiment except that the material is not filled with rubber, wood or stone.

  In this embodiment, when a car or the like collides with the outer steel pipe 4, if the deformation of the outer steel pipe 4 comes into contact with the inner steel pipe 5 (or the shaped steel 11), the inner surface of the outer steel pipe 4 becomes the inner steel pipe 5 (or the shaped steel). 11) and the outer steel pipe 4 or the inner steel pipe 5 (or the shape steel 11) jointly absorbs energy at the time of a collision of an automobile or the like while deforming.

  FIGS. 7 and 8 show a strut structure according to another embodiment of the present invention. The difference from FIGS. 5 and 6A and 6B is that the outer shape of the inner steel pipe 5 is smaller. Although the point which has arrange | positioned the inner steel pipe 5 is different, the other structure is the same as that of the said embodiment. The innermost inner steel pipe 5 is also provided with a lateral through-hole for penetrating the cylindrical fixing member 7 so that the support member 14 can be penetratingly disposed as necessary. When the interval between the two inner steel pipes 5 is narrow and welding is difficult, the cylindrical fixing member 7 is welded and fixed only to the outer steel pipe 4, and the two inner steel pipes 5 are not welded to the horizontal through holes provided. You can just pass it through.

  In this embodiment, when an automobile or the like collides with the outer steel pipe 4, if the deformation of the outer steel pipe 4 comes into contact with the inner steel pipe 5 (or the shape steel 11), the inner surface of the outer steel pipe 4 is the intermediate inner steel pipe 5 (or The outer steel pipe 4 or the intermediate inner steel pipe 5 is jointly deformed and absorbs energy at the time of a collision of an automobile or the like. Further, when the deformation of the intermediate inner steel pipe 5 comes into contact with the innermost inner steel pipe 5, the outer steel pipe 4, the intermediate inner steel pipe 5 and the innermost inner steel pipe 5 are jointly deformed, Absorb energy at the time of collision. A shape steel may be arranged in place of the innermost inner steel pipe 5. As described above, when the outer steel pipe is deformed by an external force such as a collision of the vehicle or the like, it can be supported while efficiently absorbing the collision energy of the vehicle or the like if it is supported by the inner steel pipe or the shape steel arranged sequentially inside.

  In addition, although illustration is abbreviate | omitted, in the form which replaces the inner steel pipe 5, and the shape steel 11 is arrange | positioned, you may make it arrange | position the innermost shape steel smaller than the groove | channel in the groove | channel of the shape steel 11. It is preferable to arrange them so as to be concentric with the outer steel pipe 4 because there is no directionality in all lateral directions. In addition, although illustration is abbreviate | omitted, also in each said embodiment which is not filled with slag or earth and sand 8, it is good also as a deformation | transformation form with which slag or earth and sand 8 are filled into the partial space in the upper support | pillar 1, or the whole space.

  As a lower structure for supporting the upper support column 1, the lower sheath tube 3, the concrete sheath tube as in the embodiment, or the lower sheath tube 3 in the block-shaped concrete foundation 3 b as shown in FIG. 13. It may be a composite structure in which is embedded.

  As described above, in the strut structure of the present invention, the outer steel pipe 4 and the inner steel pipe 5 (or the section steel 11) are installed apart from each other, that is, the outer steel pipe 4 and the inner steel pipe 5 (or the section steel 11) are in contact with each other. By not doing, by exhibiting three behaviors: (1) deformation of the outer steel pipe 4, (2) collision between the outer steel pipe 4 and the inner steel pipe 5 (or shape steel), and (3) deformation of the inner steel pipe 5 Impact energy absorption performance can be improved. In addition, slag and earth and sand (especially sand, gravel) 8 or urethane, rubber, wooden, and stone substances (preferably finely crushed substances) are provided in these spaces to reduce the impact of slag and earth and sand. (Especially sand, gravel) 8 and the like, and the slag and earth and sand 8 collide and dissipate, so that further improvement in absorption performance can be achieved. By providing the slag and earth and sand 8 inside the outer steel pipe 4, deformation (particularly buckling) of the outer steel pipe 4 and the inner steel pipe 5 (or the shaped steel 11) can be suppressed, and a sound absorbing effect can be obtained.

  When comparing the energy absorption performance of each of the above embodiments, (1) the inner steel pipe 5 or the shape steel 11 is provided in one space or the entire space of the outer steel pipe 4 so as not to contact the outer steel pipe 4, and the steel pipe and the inner steel pipe Or, a structure in which slag or earth and sand are provided in the space surrounded by the shape steel, and (2) a structure in which the inner steel pipe or the shape steel is provided so as not to contact the steel pipe in one space or the entire space inside the steel pipe. Is obtained.

  By setting the thickness of the outer steel pipe 4 or the inner steel pipe 5 and the shape steel 11 to be relatively thin (for example, 4 mm or less), the outer steel pipe 4 or the inner steel pipe 5 is easily deformed when the automobile collides, and the outer steel pipe 4 Or when the deformation energy of the inner steel pipe 5 becomes large, a large collision energy can be absorbed. The outer steel pipe 4, the inner steel pipe 5, and the shaped steel 11 may be formed by any forming by hot rolling and cold working. In addition, because steel pipes and shaped steel, which are steel products, are used, the strength and deformation performance are high, and the occupied area of the member (steel pipe) can be rationalized, so that collision energy can be absorbed within a limited area. .

  The particle size of the slag and earth and sand 8 is preferably a size that can be easily installed inside the outer steel pipe 4 or the inner steel pipe 5. For example, when the inner steel pipe 5 having a diameter of 101.6 mm and a thickness t = 3.2 mm is installed inside the outer steel pipe 4 having a diameter of φ165.2 mm and a thickness t = 3.8 mm, the maximum particle size is set to 28 mm or less. It is desirable for installation. Further, it is desirable that the gap between the outer steel pipe 4 and the inner steel pipe 5 or the inner steel pipe 5 is made as large as possible in order to facilitate movement of slag and sand. As the slag, various steel slags such as stones and granules may be used.

  Next, with reference to FIG. 14, a description will be given of a form in which the retractable support 20 having the support structure of the present invention is used as a support for a temporary median in a temporary lane or the like of a road structure. A lower sheath tube (not shown) and the like are embedded and arranged in series at intervals in the longitudinal direction of the central separation band 19, and the upper support column 1 is erected so as to protrude from the lower sheath tube. In this way, the retractable support column 20 alone may be arranged in series.

  FIGS. 15 to 19 show an embodiment of a support post with a guard rail of the present invention, FIG. 15 is a schematic perspective view, and FIG. 16 is a schematic side view showing a form in which a guard rail such as a shape steel is provided across the support post. FIG. 17 is a schematic side view showing a form in which guard rails such as shaped steel are provided stepwise across the column, FIG. 18 is a schematic side view showing another form, and FIG. 19 is another example in which guard rails such as shaped steel are provided. It is a schematic front view which shows the form.

  FIG. 15 conceptually shows a configuration in which the retractable struts 20 are installed in series at intervals and the guard rail 21 is provided across the adjacent retractable struts 20. As shown in FIG. 16, the upper struts adjacent to each other in the longitudinal direction of the road so that the grooved steel 21a serves as the guard rail 21 and the groove portions of the grooved steel 21a face each other on the upper strut 1 side on both sides of the outer steel pipe 4 in the upper strut 1. 1, the upper columns 1 are arranged at intervals in the vertical direction so that the flanges 22 of the channel steels 21a come into contact with the upper columns 1 and the flat webs 23 face the road. Therefore, the upper column 1 is fixed to the upper column 1 by bolts 24. As described above, the grooved steel 21a is arranged in two upper and lower stages so as to cope with collisions of various vehicles having different vehicle heights.

  In the form shown in FIG. 17, two channel steels 21a arranged above and below the outer steel pipe 4 in the upper support column 1 are arranged close to each other in the vertical direction so as to straddle the web outer surface of the two channel steels 21a. The end of the flange 22 of the outer grooved steel 21b is placed in contact with the bolt 24 inserted through the web of the grooved steel 21a and the grooved steel 21b into the female screw hole of the outer steel pipe 4 and fixed in a lateral direction. The other guide rail 21 is the same as that of the above embodiment. When the guide rail 21 having such a two-stage structure is used, the rigidity of the guard rail 21 can be increased, so that the bearing performance during a collision of an automobile or the like can be improved.

  In the form shown in FIG. 18, the outer steel pipe 4 of the upper support column 1 is arranged so that the webs 23 of the guard rail 21 made of a pair of channel steels 21 a are in contact with each other or close to each other. One or both of the channel steels 21 a are fixed by welding, and the webs 23 of the channel steels 21 a are integrated with each other by bolts and nuts 24. In this case, since there are few dimensions protruding in the road width direction from the upper support column 1, it is possible to easily cope with a narrow central separation zone and a road.

  In the form shown in FIG. 19, an end plate 25 for mounting is provided in the longitudinal direction of the channel steel 21 a, and is inserted into the bolt insertion hole of the mounting end plate 25 and screwed into the female screw hole of the outer steel pipe 4. The form in which the grooved steel 21a as the guardrail 21 is attached by the bolt 24 is shown. As described above, when the end plate 25 for attachment is provided at the end portion of the guard rail 21 in the longitudinal direction of the member, the end plate 25 is attached to the upper support column 1 or the grooved steel 21a is welded to the outer steel pipe 4. Even when fixed, it can be held.

  According to each of the embodiments described above, a simple column structure that enables quick and easy removal while improving the absorption performance of collision energy at the time of a vehicle collision is obtained. Such a column structure is a road structure, particularly FIG. And it is preferable to apply to a median strip structure that can contribute to the prevention of collision accidents on a high-standard road of provisional two lanes as shown in FIG. It can also contribute to prevention of vehicle deviation in the railway structure.

  According to each of the embodiments as described above, (1) it is possible to satisfy the performance required for the median strip of the provisional two lanes, and (2) at the time of a reliable collision within a limited width It is possible to absorb the shock of the road, prevent it from jumping out to the oncoming lane, and it is necessary to widen the road (about 1.5m is required) to provide a known median strip normally used in 4 lanes, which is enormous However, the post structure of the present invention can cope with the low cost, and (3) The emergency vehicle in an emergency enters the oncoming lane by lowering and storing the upper support column. It is also possible. (4) In addition, there is an effect that (4) it is easy to remove in the future four-lanes.

Next, an example about weight reduction of the support | pillar structure of this invention is demonstrated.
(Calculation prerequisites)
Outer steel pipe outer diameter: φ165.2mm (thickness: t = 3.8mm)
Inner steel pipe outer diameter: φ101.6mm (thickness: t = 3.2mm)
Upper strut height: 1.6m (inner, embedded length 0.4m for lower sheath tube)

Slag density: 26 kN / m ³ (filling rate 74%)
Sediment density: 17 kN / m ³ (porosity 100%)
(The particle size distribution is constant and the particle size is not considered)
(Result of weight reduction)
If the mass of a steel column with a solid cross section is 100%,
1) Double pipe only (no filling): 14%
2) Slag 100% filling: 46%
3) Slag 80% filling: 40%
4) Earth and sand 100% filling: 35%
5) Earth and sand 80% filling: 31%

Here, when the density of the steel support is 7.85 g / cm ³ ,
Mass of steel support with solid cross section: about 270kg
Outer steel pipe support mass: Approximately 24.4 kg,
Inner steel pipe support mass: Approximately 12.5 kg
Slag mass at 100% filling: about 90kg
Sediment mass at 100% filling: Approximately 60 kg
The steel pillar with a solid cross section cannot be installed by human power, but with the double-pipe upper column of the present invention, it is approximately 37 kg. Then, even when filling slag, it becomes possible to install the upper support column without using heavy machinery or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a strut structure according to an embodiment of the present invention, in which (a) is a partially cut longitudinal front view showing a state in which an upper strut is raised, and (b) is a longitudinal front view showing a state in which an upper strut is stored. FIG. 1A is a cross-sectional view taken along line AA in FIG. 1A, FIG. 1B is a view corresponding to the cross section taken along line AA in FIG. 1A when the inner steel pipe is a square steel pipe, and FIG. It is a figure equivalent to the AA line cross section of Fig.1 (a) at the time of replacing with an inner steel pipe and using it as a channel steel. It is a description perspective view when storing an upper support | pillar. It is a description perspective view when storing an upper support | pillar. 4A and 4B show a column structure according to another embodiment of the present invention, in which FIG. 5A is a partially cut longitudinal front view showing a state where the upper column is raised, and FIG. 5B is a diagram showing a state where the upper column is stored. It is a part notch vertical front view. 5A is a cross-sectional view taken along line BB in FIG. 5A, FIG. 5B is a view corresponding to the cross section taken along line BB in FIG. 5A when the inner steel pipe is a square steel pipe, and FIG. It is a figure corresponded to the BB line cross section of Fig.5 (a) at the time of replacing with an inner steel pipe and using a grooved steel. 4A and 4B show a column structure according to another embodiment of the present invention, in which FIG. 5A is a partially cut longitudinal front view showing a state where the upper column is raised, and FIG. 5B is a diagram showing a state where the upper column is stored. It is a part notch vertical front view. (A) is the CC sectional view taken on the line of Fig.7 (a), (b) is a figure equivalent to the CC sectional view of Fig.7 (a) at the time of making an inner steel pipe into a square steel pipe. It shows the form of various cylindrical fixing members that connect the outer steel pipe and the inner steel pipe, (a) is a longitudinal side view showing the form of a small diameter steel pipe, (b) is a longitudinal side view showing the form of a square steel pipe FIG. 1C is a longitudinal side view showing a rectangular steel pipe having a rectangular cross section. (A) is a transverse plan view in the form of FIG. 9 (c), (b) shows a form using a cylindrical fixing member that uses a short steel pipe on both sides inside the outer steel pipe to fix the outer steel pipe and the inner steel pipe. It is a cross-sectional plan view The plate-shaped support member which has a running wheel is shown, Comprising: (a) is a side view, (b) is a top view. It is a schematic front view which shows the deformation | transformation form of a supporting member, and the state which is using the supporting member. It is explanatory drawing for demonstrating the lower sheath pipe for support provided in the ground. It is a schematic perspective view which shows the state which has arrange | positioned the support | pillar provided with the support | pillar structure of this invention in the center of the road body of 2 lanes at intervals. It is a schematic perspective view which shows the state which provided guard rails, such as a shape steel, over the support | pillar provided with the support | pillar structure of this invention. It is a schematic side view which shows the form which provides guard rails, such as a shape steel, over the support | pillar provided with the support | pillar structure of this invention. It is a schematic side view which shows the form which provides guard rails, such as a shape steel, in step shape over the support | pillar provided with the support | pillar structure of this invention. It is a schematic side view which shows the other form which provides guard rails, such as a shape steel, over the support | pillar provided with the support | pillar structure of this invention. It is a schematic front view which shows the other form which provides guard rails, such as a shape steel, over the support | pillar provided with the support | pillar structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper support | pillar 2 Recessed recess 3 Lower sheath pipe 3a Bottom plate 3b Concrete base 4 Outer steel pipe 4a Cap 5 Inner steel pipe 6 Bottom plate 7 Cylindrical fixing member 7a Small diameter steel pipe 7b Square steel pipe 7c Flat rectangular cross-sectional shape member 8 Slag or earth and sand 9 Square Steel Pipe 10 Groove Steel 11 Shape Steel 11a Web 12 Ground or Road Belt 14 Support Member 15 Lifting Member 16 Roller 17 Grasp 18 Wheel 19 Center Separation Belt 20 Retractable Column 21 Guard Rail 21a Channel Steel 22 Outer Channel Steel 23 Web 24 Bolt or Bolt / Nut 25 End plate for mounting

Claims (5)

  A strut structure having a collision energy absorbing function, wherein the strut structure is provided inside the outer steel pipe for the strut so that an inner steel pipe or a shaped steel is not in contact with the outer steel pipe.   At least one of slag, earth and sand, urethane, rubber, wood, or stone is filled in a part or all of the space surrounded by the outer steel pipe and the inner steel pipe or the shape steel. The support structure according to claim 1, wherein   The strut structure according to claim 1 or 2, wherein the inner steel pipe or the shaped steel is provided on the inner side of the outer steel pipe in a part of the axial direction or substantially over the entire length.   The strut structure according to any one of claims 1 to 3, wherein when the outer steel pipe is deformed by an external force, the outer steel pipe is supported by the inner steel pipe or the shape steel sequentially arranged inside.   A strut with a guard rail, wherein a single section or a plurality of sections are attached to the outer steel pipe in the strut structure according to any one of claims 1 to 4 as a guard rail in a direction perpendicular to the outer steel pipe. .

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