JP5306530B1 - Protective fence reinforcement structure - Google Patents

Abstract

The present invention provides a reinforcing structure for a protective fence that can prevent or reduce deformation or damage of a support by relaxing impact energy acting on the support itself.
A plurality of support pillars 12, 12, and 12 are installed at predetermined intervals on an installation surface, and a protection surface body 16 that locks a fallen object is supported by these support pillars 12, 12, and each support pillar 12, 12 is supported. , A column protection member 18 for column protection is installed in the vicinity of the 12 mountain sides. The protective surface body 16 has a plurality of horizontal rope members 13 extending in the vertical direction extending between the support columns 12, 12, and 12, and a coil-like engagement member 21 is attached to each of the horizontal rope members 13. Thus, the buffer housings 19 of the column protection members 18 are engaged so as to be relatively slidable in the rope length direction.
[Selection] Figure 1

Description

  The present invention relates to a reinforcing structure for a protective fence against falling objects such as falling rocks.

  Conventionally, as a protective fence that protects roads, structures, people, etc. from falling objects such as avalanches and rockfalls, rockfall protection with a support post fixed on the upper surface of the retaining wall, and a rope and guard net attached to this support post At the fence, remove the rope and guard net from the support, cover the support with a cylindrical pipe, attach the lower end of this pipe to the retaining wall with a pipe mounting bracket, fill the hollow part of the pipe with mortar, and add the support and pipe. There is a reinforcement structure that reinforces the column by fixing the two together and attaches a new cable and guard net to the pipe (for example, see Patent Document 1).

JP 2002-047617 A

  Such conventional technology is designed to take into consideration that falling objects such as earth and sand and falling rocks directly collide with the guard post. When excessive falling objects collide directly, mainly by bending deformation of the pillar. The collision energy must be absorbed.

  However, when the bending deformation of the support column becomes a remarkable plastic deformation, for example, the road 1 curved in an arc shape like a rockfall protection fence installed on a slope of a mountainous area as shown in FIG. In the protective surface structure in which a plurality of support pillars 2, 3, and 4 are installed along the mountain side, and a protective surface body 5 such as a wire rope material provided in a plurality of vertical directions by these support pillars 2, 3, and 4 is stretched. Falling rock 6 that falls on the slope of the mountain side from the direction of the arrow directly collides with the support 3 of the falling rock protection fence, and the support 3 is deformed or displaced on the road 1 side due to the collision energy, and is located, for example, at the place indicated by the support 3a. In the case of deviation, the tension of the protective surface body 5 is loosened as shown by a two-dot chain line in FIG. 25, and the protective surface body 5, a device that absorbs collision energy when tension is generated on the protective surface body, Adjacent Energy absorption due to bending deformation of the pillar can not be expected, it will have to absorb energy respective post 2, 3 and 4 alone.

  In particular, as shown in Patent Document 1, the structure that reinforces the strut with mortar is a work that removes the rope and guard net from the strut to reinforce the strut, or replaces the existing strut with a large diameter and thicker one. There is a problem that these operations are not easy and expensive.

  The present invention has been made in view of the above points, and has a protective fence reinforcing structure that can mitigate impact energy acting on the column itself, prevent or reduce plastic deformation and damage of the column, and can be easily constructed. The purpose is to provide.

According to the first aspect of the present invention, there are provided a plurality of support columns installed at intervals on the installation surface, a protective surface body that is supported by these support columns to lock the falling objects, and the proximity of each support column on the falling object collision side. And a supporting member for protecting the supporting column from a fallen object at each position, and the protective surface body includes a plurality of horizontal rope members in the vertical direction provided between the supporting columns. The horizontal rope member is a reinforcing structure for a protective fence provided so as to be slidable in the rope length direction with respect to the column and the column protection member .

The invention described in claim 2, in reinforcing structure of a safety barrier according to claim 1, strut protection member rope length for the horizontal rope materials vertical plural stages which are stretched between several posts It is provided with a plurality of upper and lower engaging members which are engaged so as to be relatively slidable in the direction.

  According to a third aspect of the present invention, the support member in the reinforcement structure for the protective fence according to the first or second aspect is a shock-absorbing casing in which a padding frame is filled with a filling material.

  According to a fourth aspect of the present invention, the column protection members in the reinforcing structure of the protective fence according to any one of the first to third aspects can be stacked in a plurality of stages in the vertical direction.

  According to a fifth aspect of the present invention, in the protective fence reinforcing structure according to any one of the first to fourth aspects, a cushioning material disposed between the support column and the support column protection member is provided.

  According to a sixth aspect of the present invention, the cushioning material in the reinforcing fence reinforcing structure according to the fifth aspect is formed of a synthetic resin foam.

  According to a seventh aspect of the present invention, in the protective fence reinforcing structure according to any one of the first to fourth aspects, a mountain-side protective surface provided separately from the protective surface between the columns between the mountain-sides of the column protective members; A movable support column is provided that is movably disposed between the protection surface body between the support columns and the mountain-side protection surface body and is engaged with the protection surface body between the support columns in a plurality of vertical directions.

  According to an eighth aspect of the present invention, the saddle-like frame body in the protective fence reinforcing structure according to the third aspect is provided so as to be able to be lifted in a state in which the filling material is contained.

  In a ninth aspect of the present invention, the support member in the reinforcing structure for a protective fence according to the first aspect is such that the inside of a cylindrical body erected along the support is filled with a filling material.

  According to a tenth aspect of the present invention, the tubular body in the reinforcing structure for a protective fence according to the ninth aspect is a corrugated pipe having a corrugated portion.

  According to the eleventh aspect of the present invention, the filling material for the column protection member in the reinforcing structure of the protective fence according to the third or ninth aspect is housed in a bag-like body that can be lifted.

  According to a twelfth aspect of the present invention, the filling material for the column protection member in the reinforcement structure for the protective fence according to the third aspect is housed in a wire mesh container reinforced by a rebar that can be lifted.

  According to a thirteenth aspect of the present invention, the filling material of the column protection member in the reinforcing structure of the protective fence according to the third aspect is a synthetic resin foam.

  According to a fourteenth aspect of the present invention, the protective face body in the reinforcing structure of the protective fence according to the first aspect has a vertical spacing member provided between a plurality of horizontal rope members in the vertical direction, and a column protection The member is connected to the support column or the spacing member by a coupling member, and the horizontal rope member is slidable in the rope length direction with respect to the support column and the support column protection member.

  According to a fifteenth aspect of the present invention, in the reinforcement structure for the protective fence according to any one of the first to fourteenth aspects, the struts involved in the collision are such that the energy absorbed by the struts is less than the energy that can be absorbed by the struts. The mass of the protective member is determined.

  The invention described in claim 16 is the protective fence reinforcement structure according to any one of claims 1 to 14, wherein an impact force at which the energy absorbed by the column is equal to the energy that can be absorbed by the column is defined as an allowable impact force. The specifications of the column protection member are determined so that the expected impact force of the fallen object is less than the allowable impact force.

According to the first aspect of the present invention, the impact energy due to falling objects such as falling rocks is absorbed by the support member, so that the impact acting on the support from the falling object is mitigated to prevent plastic deformation, damage and collapse of the support. Alternatively, since the column protection member is installed at a position close to the falling object collision side of each column, construction can be easily performed. In addition, the horizontal rope material of multiple steps in the vertical direction of the protective face body is slidable in the rope length direction with respect to the support column and the support material of the support column, so even if a load is applied to one part of the horizontal rope material The load can be absorbed by the deformation over the entire length of the horizontal rope member, the load concentrated locally on the horizontal rope member can be reduced, and the durability of the horizontal rope member can be improved.

  According to the invention of claim 2, the rope length of the horizontal rope member is secured to the column protection member by the engagement member of the vertical direction multiple steps with respect to the horizontal rope material of the multiple levels in the vertical direction stretched between the multiple columns. Because it is engaged so that it can slide relatively in the vertical direction, the impact of falling objects such as falling rocks by the tension of the horizontal rope material in multiple vertical directions is suppressed without suppressing the sliding movement in the rope length direction. It can absorb power effectively. Also, in the event of an earthquake, the column protection member is stable because the displacement of the support column is restrained against shaking in the direction of the mountains and valleys. Since it is restrained, it will not fall over and stability can be secured.

  According to the invention of claim 3, by using a buffer housing filled with a filling material such as crushed stone in the rod-shaped frame body as a column protection member, an economical and robust column protection member can be provided, Various types of buffer housing can be used according to the usage environment and installation conditions of the construction site.

  According to the fourth aspect of the present invention, since the column protection members can be stacked in a plurality of stages in the vertical direction, it is easy to support the column protection members according to the desired column height suitable for the usage environment and installation conditions of the construction site. Can be configured.

  According to the fifth aspect of the present invention, since the shock force due to falling objects such as falling rocks can be directly prevented from being applied to the column by the column protection member, a protective fence having excellent durability can be constructed.

  According to the invention of claim 6, by using a synthetic resin foam such as polystyrene foam or polyethylene foam as a cushioning material, the impact energy of the fallen object can be reduced by an inexpensive cushioning material, and the impact force acting on the column can be reduced. Can be kept to a minimum.

  According to invention of Claim 7, the impact force which acted on the mountain side protection surface body provided between the mountain sides of a support | pillar protection member is made to carry out the up-down direction by the movable support | pillar engaged with the protection surface body between support | pillars in the up-down direction several steps. Dispersed and absorbed by the entire protective face between the pillars, it is possible to prevent the impact force from concentrating only on specific locations where falling objects such as falling rocks collide, and damage or deterioration of the protective fence due to the concentration of impact force Can be prevented or reduced.

  According to the invention described in claim 8, since the bowl-shaped frame containing the filling material can be lifted by a construction machine or the like, it is easy to assemble at the time of construction, or to be disassembled or reassembled at the time of repair. Can do.

  According to the ninth aspect of the present invention, the construction and maintenance management is simple because it is configured to fill the inside of the cylindrical body standing along the support column, and unlike the casing. In addition, there is no possibility that the filling material jumps out of the gap between the casings when the falling object collides, and the column protection member can be kept in the initial state even against a strong impact.

  According to the tenth aspect of the present invention, by using the corrugated pipe and filling the inside with the filling material, the collision energy of the fallen object can be absorbed by the deformation of the corrugated portion of the corrugated pipe.

  According to the eleventh aspect of the invention, since the filling material stored in the bag-like body can be lifted by a construction machine or the like, it is easy to assemble at the time of construction, or to be disassembled or reassembled at the time of repair. The work efficiency at the time of these work can be improved.

  According to the twelfth aspect of the present invention, since the filling material stored in the wire mesh container reinforced by the reinforcing bar can be lifted by a construction machine or the like, it is possible to assemble at the time of construction, or to be disassembled or reassembled at the time of repair. Can be easily performed, and the working efficiency during these operations can be improved.

  According to the thirteenth aspect of the present invention, when the filling material for the column protection member is a synthetic resin foam, it is easy to handle the column protection member.

  According to the fourteenth aspect of the present invention, when the column protection member is connected to the column or the spacing member by the coupling member, the connection position in the vertical direction can be freely selected as compared to the case where the column protection member is connected to the horizontal rope member. it can. Furthermore, when the strut protection member is connected to the strut, the horizontal rope material is not restrained, so the flexibility of the horizontal rope material is large, and the horizontal rope material is slidable. The durability of the rope material can be improved.

  According to the invention of claim 15, since the mass of the column protection member involved in the collision is determined so that the energy absorbed by the column is equal to or less than the energy that can be absorbed by the column, the specification of the column protection member is determined from this mass. Can be easily changed.

  According to the sixteenth aspect of the present invention, the impact force at which the energy absorbed by the support column is equal to the energy that can be absorbed by the support column is defined as the allowable impact force, and the predicted impact force of the fallen object is less than the allowable impact force. Since the specifications of the column protection member are determined, the impact force of the fallen object can be appropriately controlled by this column protection member.

It is a perspective view which shows 1st Embodiment of the reinforcement structure of the protection fence which concerns on this invention. It is a side view of a reinforcement structure same as the above. It is a top view of a reinforcement structure same as the above. It is a side view which shows 2nd Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a top view of a reinforcement structure same as the above. It is a top view which shows 3rd Embodiment of the reinforcement structure of the protection fence which concerns on this invention. It is a top view which shows 4th Embodiment of the reinforcement structure of the protection fence which concerns on this invention, (a) shows the installation attitude | position of the support | pillar protection member, (b) is the inclination of the support | pillar protection member after a falling object collision Indicates posture. It is a top view which shows 5th Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a top view which shows 6th Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a front view of a reinforcement structure same as the above. It is a top view which shows 7th Embodiment of the reinforcement structure of the protection fence which concerns on this invention, (a) shows the installation attitude | position of the support | pillar protection member, (b) is a deformation | transformation of the support | pillar protection member after a fallen object collision Indicates posture. It is a disassembled perspective view which shows an example of the buffer housing in each said embodiment. It is a disassembled perspective view which shows the other example of the buffer housing in each said embodiment. It is side sectional drawing which shows 8th Embodiment of the reinforcement structure of the protection fence which concerns on this invention. It is a top view of a reinforcement structure same as the above. It is a sectional side view which shows 9th Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a top view which shows 10th Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a top view which shows the buffering effect of a reinforcement structure same as the above. It is a top view which shows 11th Embodiment of the reinforcement structure of the guard fence which concerns on this invention. It is a reference figure for understanding the method 1 which determines the specification of a support | pillar protection member by determining the energy absorbed by a support | pillar. It is a model figure for data collection for understanding the method 2 which determines the specification of the support | pillar protection member by determining the energy absorbed by a support | pillar. It is a collection data display characteristic figure for understanding technique No. 2. It is a support | pillar model figure for understanding the method # 2. It is an energy conversion figure for understanding method 2. It is a top view which shows the construction example of the conventional protective fence.

  The present invention will be described in detail based on a plurality of preferred embodiments with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims.

(First embodiment)
As shown in FIG. 1 to FIG. 3, a protective fence 10 that is an impact absorbing fence against a falling object has a ground surface below an inclined surface 11 a such as a mountain as an installation surface 11. , 12, 12 are erected almost vertically and in parallel.

  The plurality of struts 12, 12, 12 are made of H-shaped steel, concrete columns, steel pipes or concrete-filled steel pipes, etc. In this embodiment, steel pipes having the same shape and high rigidity are used, and the lower part 12u of the struts is installed on the installation surface 11. It is embedded in and fixed.

  Further, horizontal rope members 13 and 13 are provided between the columns 12, 12 and 12 in the upper and lower stages. The space between the columns 12, 12, and 12 is shielded by the wire mesh 14. Further, the wire mesh 14 is coupled to the horizontal rope members 13 and 13 by a coupling material such as a band wire. In addition, the horizontal rope members 13 and 13 are engaged with the vertical spacing members 15, respectively, so that even when a falling object collides, the spacing between the upper and lower horizontal rope members 13 and 13 is increased. It is a structure that can prevent falling objects from passing through.

  A protective face 16 is formed by the horizontal rope member 13, the wire mesh 14 and the spacing member 15.

  The struts 12, 12, and 12 may be fixed with the lower part built into the ground as described above, or may be fixed to a concrete foundation, etc. You may fix with the rope rope material of the valley side which is a mountain side.

  These struts 12, 12, 12 are provided with a plurality of rope locking members 17 for locking the respective horizontal rope members 13. These rope locking members 17 are configured by locking hooks or the like for locking the respective horizontal rope members 13 or 13, or welding steel materials having a diameter through which the respective horizontal rope members 13 and 13 can be inserted. Are fixed to the respective struts 12, 12, 12, and allow the lateral rope members 13, 13 to move in the rope length direction.

  In the protection fence 10 thus installed, in this embodiment, the column protection member 18 is installed on the front side of the mountain side of the columns 12, 12, 12. This column protection member 18 is constructed by stacking a buffer housing 19 such as a gabion filled with a filling material 19b such as crushed stone in a bowl-shaped frame 19a formed in a bowl shape by iron wires such as a wire mesh in a plurality of vertical directions. However, the column protection member includes a bag-shaped body filled with crushed stone or earth and sand.

  The support member 18 is arranged at the front of the mountain side of the support 12, 12, 12 so that when there is a fallen object 20 such as a falling rock from the slope as shown by the falling direction X, the support member 18 Thus, it is possible to prevent the collision energy from being directly applied to the columns 12, 12, and 12. In addition, it is preferable to arrange | position the support | pillar protection member 18 on the peak side of all the support | pillars 12, 12, and 12, in FIG. 1, illustration of the support | pillar protection member 18 is abbreviate | omitted in the center support | pillar 12 for description.

  The filling material 19b of the buffer housing 19 can be used at low cost because various materials such as earth and sand, crushed stones obtained by crushing rocks, and recycled concrete such as waste can be used. Can be manufactured. And since it is a heavy object that is not slippery and can withstand the collision energy of the fallen object 20, it should be installed close to the front of the columns 12, 12, 12 without being buried in the ground of the installation surface 11. It has a function as a column protection member.

  As shown in FIG. 2 and FIG. 3, the strut protection member 18 of the present embodiment is connected to each lateral rope member 13 via a coil-shaped engagement member 21 on a joint surface 19 g facing each strut 12 side. The wire mesh 14 is engaged. In the engaging member 21, in order to maintain a stable installation state of each column 12 and the column protection member 18 even when a disaster such as an earthquake occurs, the buffer case 19 is joined in a plurality of stages in the vertical direction. Therefore, it is a coil spring shape that does not hinder the operation of the lateral rope member 13 having the lateral tension.

  That is, the horizontal rope member 13 is slidable in the rope length direction relative to the rope locking member 17 of the column 12 and the engagement member 21 of the column protection member 18, and therefore, the horizontal rope Even when a load is applied to one part of the material 13, it becomes possible to absorb the load by deformation over the entire length of the horizontal rope material 13, reducing the load concentrated on the local side of the horizontal rope material 13, Durability can be improved.

  As described above, in the present embodiment, a plurality of support columns 12 are provided on the installation surface 11 as an installation surface at predetermined intervals on the left and right sides, and the horizontal rope members 13 are provided in a plurality of stages in the vertical direction, that is, in multiple stages. In the protective fence 10, the strut protection member 18 is arranged on the mountain side of the strut 12, so the impact energy due to falling objects 20 such as falling rocks on the strut 12 is absorbed by the protective strut protection member 18 and is applied to each strut 12. Construction is possible because it can mitigate impact, prevent or reduce plastic deformation, damage and collapse of each strut 12, and install the strut protection member 18 along each strut 12 in the proximity of the falling object collision side of each strut 12. Can be done easily.

  As described above, in the present embodiment, in the protective fence 10 provided with the protective face body 16 composed of the horizontal rope members 13 and the wire mesh 14 in a plurality of vertical directions, the horizontal rope material 13 and the support column are disposed via the wire mesh 14. Coiled engagement members 21 that connect the respective buffer housings 19 of the protection member 18 are provided, and the strut protection members 18 are connected to the lateral rope members 13 of the protection fence 10 by these engagement members 21 with a rope length. Because it is engaged so that it can be slid relative to the direction, falling rocks etc. due to the tension of the horizontal rope material 13 in the vertical direction without suppressing the sliding movement of the horizontal rope material 13 in the rope length direction The impact force of the falling object 20 can be effectively absorbed.

  Also, in the event of an earthquake, the column protection member 18 is stable because the displacement of the column protection member 18 is restrained against shaking in the direction of the mountains and valleys. Since the displacement is constrained, it does not fall over and stability can be ensured.

  Furthermore, in this embodiment, since the buffer casing 19 of the support column protection member 18 can be stacked in a plurality of stages in the vertical direction, the desired height of the support column 12 that matches the use environment and installation conditions of the construction site. A strut protection member 18 can be configured according to the height.

(Second Embodiment)
4 and 5 show a second embodiment of the present invention, where the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and other parts are described in detail. In other words, as shown by the falling direction X, the cushioning material 22 in the case where there is a fallen object 20 from the slope on the mountain side is used as a cushioning pad such as a plurality of gabions constituting the pillars 12, 12, 12 and the pillar protection member 18. It is located at an intermediate site with the body 19.

  This cushioning material 22 is a foamable synthetic resin block formed into a block shape with a synthetic resin foam, and is provided along the column protection member 18 installed close to the front surface of the mountain side of each column 12, In this configuration, the contact surface 23 is attached. As the molding material of the cushioning material 22, various synthetic resin foams such as foamed polystyrene, foamed polyethylene, foamed polypropylene, and foamed urethane can be used. Further, the cushioning material 22 is more than the support guard member 18 to be attached. It is molded to a thin thickness.

  The strut protection member 18 according to the present embodiment is connected to each lateral rope member 13 and the like via a connecting member 21a such as a wire inserted into the shock absorber 22, and is buffered between the protection face body 16 and the strut protection member 18. The material 22 is held.

  By configuring as described above, even if the fallen object 20 collides with the front surface of the column protection member 18 formed by stacking a plurality of buffer housings 19, the shock energy is buffered by the buffer material 22. Thus, it is possible to prevent or reduce bending deformation due to the impact of each support column 12, and to further improve the strength and stability of the entire protective fence 10 including each support column 12. Note that the longitudinal dimension of the column protection member 18 is set larger than the longitudinal dimension of the cushioning material 22.

  Thus, in the present embodiment, since the cushioning material 22 is arranged between the support column protection member 18 and the support column 12, the buffer material 22 can directly apply the impact force due to the fallen object 20 such as falling rocks to the support column 12. Since it can be prevented, a protective fence 10 with excellent durability can be constructed.

  Further, in this embodiment, since the synthetic resin foam such as polystyrene foam and polyethylene foam is used as the buffer material 22, the shock energy of the falling object 20 can be reduced by the inexpensive buffer material 22, and The acting impact force can be kept to a minimum.

(Third embodiment)
FIG. 6 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiment, the detailed description thereof will be omitted, and other parts will be described in detail.

  In the embodiment shown in FIG. 6, the impact of the fallen object 20 is received on the side of the protective fence 10 by changing the shape of the column protection member 18 installed on the mountain side front surface of each column 12 according to the use environment and installation conditions. Thus, the configuration is such that the impact energy to each column 12 can be reduced.

  The column protection member 18 shown in FIG. 6 is provided with buffer casings 19V such as a plurality of gabions that constitute the column protection member 18 formed in a triangular column shape with a pointed end on the mountain side provided in a plurality of stages in the vertical direction. In addition, when falling objects 20 such as earth and sand or falling rocks fall toward each column 12, impact energy can be received in the left-right direction with the tip portion 19Vt as a boundary.

  The buffer housing 19V is obtained by filling the inside of a bowl-shaped frame 19a with a filling material 19b such as crushed stone, and with the tip portion 19Vt as an upper portion, as shown in FIG. The rope-side contact surface 19Vu, which is the bottom portion, is arranged so as to face the mountain-side front portion of each column 12 with the protective surface body 16 in between.

  Then, as shown in FIG. 6, the fallen object 20 moves by colliding with the left contact surface 19Vl which is the left side portion of the buffer housing 19V by the buffer housing 19V formed into a triangular shape. It is swept away in the direction Y and is buffered by the horizontal rope member 13 or the wire mesh 14 part connected to the horizontal rope member 13.

  As described above, the buffer housing 19V of the present embodiment has a symmetrical isosceles triangle shape having the right contact surface 19Vr and the left contact surface 19Vl. By making contact with either the right contact surface 19Vr or the left contact surface 19Vl on the right and left sides, the impact energy is absorbed and then passed to the protective surface body 16, and the impact energy is transferred to the support column 12 and the buffer housing 19V. And can be shared by the entire protective face 16.

  The tip end portion 19Vt of the buffer housing 19V may be disposed in an inverted triangular shape with respect to the mountain side, which is positioned on each column 12 side.

(Fourth embodiment)
FIG. 7 shows a fourth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiment, the detailed description thereof will be omitted, and other parts will be described in detail.

  The buffer housing 19W such as a plurality of gabions constituting the column protection member 18 shown in FIG. 7 is formed into an isosceles trapezoidal quadrangular prism in a plan view in which the opposite sides of the upper bottom portion 19Wt and the lower bottom portion 19Wu are parallel. In the present embodiment, the lower bottom 19Wu is disposed in the reverse direction toward the mountain side. Further, the buffer housing 19W is arranged so that the upper bottom portion 19Wt faces the front side of the mountain side of each support column 12 with the protective surface body 16 in between, and the right side portion 19Wr and the left side portion 19Wl which are the left and right sides are equal. It is composed of an equal leg having a length.

  Next, the operation will be described. As shown in FIG. 7A, when the fallen object 20 falls from the mountain-side slope toward the support column 12 in the fall direction X, the trapezoidal buffer housing 19W comes into contact with the fallen object. When an impact is applied to the right end portion of the lower bottom portion 19Wu that becomes the surface, the buffer housing 19W cushions the impact, while the upper bottom portion 19Wt and the right side portion 19Wr are placed on the column 12 as shown in FIG. The direction of the buffer housing 19W is turned rightward while largely bending the nearby protective face body 16 toward the valley side. Then, as shown in FIG. 7B, the fallen object 20 whose impact has been reduced by the support member 18 is received in the moving direction Y on the right side toward the mountain side, and the horizontal rope member of the protective surface 16 The impact energy is absorbed by 13 etc.

  At this time, the column protection member 18 is largely inclined toward the valley side due to the collision of the fallen object 20, and the flexible protective surface body 16 composed of the horizontal rope member 13 and the wire mesh 14 has a pressing force from the column protection member 18. The bending part 16a is generated by this, and the impact force is absorbed by this bending part 16a, so that excessive shock energy can be effectively buffered without causing a large impact or damage to the entire support column 12 and the protective face body 16. Can withstand.

(Fifth embodiment)
FIG. 8 shows a fifth embodiment of the present invention. The same parts as those of the above embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and other parts are described in detail.

  In the embodiment shown in FIG. 8, the column protection member 18 is installed by stacking a plurality of buffer housings 19Y formed in a columnar shape in plan view. In this embodiment, each column 12 From the viewpoint of protection, it is desirable that the buffer housing 19Y has a diameter larger than the diameter of each support column 12.

  And when there is a fallen object 20 from the mountain side, even when it falls toward the substantially central part of the column 12, the cylindrical shock absorber 19Y has a cylindrical shape. Even if it collides with any location, the impact energy can be received in either of the left and right directions.

  As described above, the triangular buffer housing 19V, the trapezoidal buffer housing 19W, and the cylindrical buffer housing 19Y described in the third to fifth embodiments are the same as those in the first and second embodiments. In addition, the padding frame 19a is filled with filling material 19b such as earth and sand or rock crushed stone, and is formed into a bowl shape with iron wire such as a wire mesh, and only the outer frame shape is changed However, the load energy applied to the column 12 can be dispersed by adopting a structure that allows the impact energy of the fallen object 20 to flow in the left and right directions by various shapes such as the buffer housing 19V, 19W, or 19Y. And the impact energy absorption effect can be improved.

  Further, the column protection member 18 of the first to fifth embodiments described above has a quadrangular buffer housing 19, a triangular buffer housing 19 </ b> V, a trapezoidal buffer housing 19 </ b> W in plan view as a polyhedron. It is formed in a three-dimensional shape with a cylindrical buffer housing 19Y, etc., and these buffer housings 19, 19V, 19W, 19Y are made by filling a padding material 19b such as crushed stone in a cage frame 19a. As a result, it is possible to provide an economical and robust support member 18 for the strut, and it can be used with various types of shock absorbers according to the usage environment and installation conditions of the construction site. By arranging gabions that can be formed into various shapes, such as polygonal prism shapes made up of polyhedrons such as shapes, cylindrical shapes, etc., the impact energy from the fallen object 20 can be absorbed and an excessive impact applied directly to the column 12 And the structure of the sturdier support member 18 and the protective fence 10 Can be built.

(Sixth embodiment)
9 and 10 show a sixth embodiment of the present invention, in which the same reference numerals are given to the same parts as those in the above-described embodiment, the detailed description thereof is omitted, and other parts are described in detail.

  A rope locking member 17 configured with a hook for locking the valley side lateral rope member 13a on the front side of the mountain side of each column 12, 12 that can be embedded and fixed in the ground, 12 are fixed to a plurality of vertical steps by welding or the like, and the rope side transverse rope member 13a is locked by these rope locking members 17 to form one protective face 16A.

  Further, on the front side of the mountain side of the support columns 12 and 12, similarly to the above-described embodiment, the buffer case 19 in which the filling material 19b such as crushed stone is filled in the inside of the rod-shaped frame 19a has a plurality of vertical stages. Strut protection members 18, 18 that are stacked on each other and engaged with the valley side lateral rope member 13a are disposed.

  Further, mountain-side horizontal rope members 13b are locked in a plurality of levels in the vertical direction on the mountain-side front portions of these column protection members 18, 18, and each column protection member 18 is bonded to these horizontal rope members 13b by a binding material such as a band wire. , 18 are joined together to form a mountain-side protection surface body 16B as the other protection surface body.

  In addition to the above configuration, in the present embodiment, the movable strut that is erected without being buried in the ground between the two wire rope members of the parallel valley side horizontal rope member 13a and the mountain side horizontal rope member 13b described above. 12A is provided. The movable strut 12A is movable in the front-rear direction in a non-fixed state in which the lower portion of the strut is in contact with the installation surface 11, and is locked to the valley side horizontal rope member 13a via a rope locking member 17A. The movable struts 12A are erected one by one between the strut protection members 18, 18.

  As shown in FIG. 9, the movable strut 12A is engaged with the trough-side horizontal rope member 13a in the non-fixed state as described above, so that the falling object 20 collides from the falling direction X from the slope on the mountain side. At that time, the collision energy is first buffered by the mountain side horizontal rope member 13b and the wire mesh 14b that shields it, but if the impact energy of the falling object 20 is excessive, the mountain side horizontal rope member 13b will be greatly bent. The impact energy is also applied to the movable strut 12A, but the movable strut 12A can move to the valley side in response to the impact, and is engaged with the upper and lower multi-level trough side lateral rope members 13a in multiple stages. The shock energy can be dispersed and buffered in the vertical direction.

  In this way, the impact energy is distributed and buffered in the vertical direction of the trough-side horizontal rope member 13a, which is the anti-mountain side, thereby damaging each of the columns 12, 12 and the protection surface body 16 due to the impact applied to a specific location. And deterioration can be prevented.

  As described above, in the present embodiment, the shock absorbers 19 of the column protection members 18, 18 are arranged on the mountain side of the plurality of columns 12, and the mountain side lateral rope member 13b is provided between the mountain sides of these buffer rods 19, Since the movable strut 12A is movably disposed between the mountain side of the buffer housing 19 and the valley side lateral rope member 13a on the anti-mountain side, the mountain side protection face 16B provided between the mountain sides of the column protection members 18, 18 While the applied impact force is dispersed in the vertical direction by the movable support column 12A engaged with the protection surface body 16A between the support columns 12 and 12 in a plurality of vertical directions, the impact force is applied to the entire protection surface body 16A between the support columns 12 and 12. Since it absorbs, it is possible to prevent the impact force from concentrating only on a specific location where the fallen object 20 such as a falling rock collides, and it is possible to prevent or reduce damage or deterioration of the protective fence 10 due to the concentration of the impact force.

  In the above-described embodiment, one movable support 12A is arranged between each support member 18 and 18. However, the present invention is not limited to this. A plurality of movable struts 12 A may be arranged between 18. Further, a wire mesh may be provided also on the valley side horizontal rope member 13a side, and the mountain side and the valley side of the column protection members 18, 18 may be shielded by the wire mesh. Furthermore, in order to improve the strength of the entire protective fence 10, a horizontal spacing member may be provided on the horizontal rope member 13 described in the first embodiment.

(Seventh embodiment)
FIG. 11 shows a seventh embodiment of the present invention, in which the column protection member 18 is formed in an elongated rectangular shape along the protection surface body 16 in a plan view as compared with the first embodiment.

  Then, as shown in FIGS. 11A to 11B, depending on the colliding part of the fallen object 20 colliding with the column protection member 18, not only the impact is received by the column 12, but also the horizontal rope member 13 and the wire mesh 14 Since the pressing force from the column protection member 18 is also applied to the flexible protective surface body 16 and the bending portion 16a is generated, and the impact force is absorbed by the bending portion 16a, the column 12 and the protection surface body 16 Can absorb excessive impact energy effectively.

  Next, FIG. 12 and FIG. 13 show an example of filling of the filling material 19b of the buffer housing 19 in the first to sixth embodiments, and the filling material 19b shown in FIG. The bag 19b2 is housed in a bag 19b2 that can be lifted by a wire 19b1, and is inserted into the bag-shaped frame 19a while being packed in the bag 19b2. Similarly, the filling material 19b shown in FIG. 13 is housed in a wire mesh container 19b5 reinforced by a reinforcing bar 19b4 that can be lifted by a wire 19b3, and is packed in the wire mesh container 19b5. Insert into the frame 19a.

  The hook-shaped frame 19a uses a wire mesh having a coarse mesh, and the wire mesh container 19b5 uses a wire mesh having a finer mesh than the hook-shaped frame 19a.

  In this way, the filling material 19b housed in the bag-like body 19b2 or in the wire mesh container 19b5 reinforced by the reinforcing bar 19b4 can be lifted by a construction machine or the like, so that it can be assembled and repaired during construction. Can be easily disassembled or reassembled, and work efficiency during these operations can be improved.

(Eighth embodiment)
14 and 15 show an eighth embodiment of the present invention, where the same reference numerals are given to the same parts as those in the above-described embodiment, and detailed description thereof will be omitted, and other parts will be described in detail.

  A column protection member 18 is installed along the column 12 on the installation surface 11 below the inclined surface 11a, such as a mountainous area, via the horizontal rope member 13 and the wire mesh 14. The column protection member 18 is provided with a corrugated pipe 25a as a cylindrical body having an upper or lower end opening shape or a bottomed shape along the column 12, and a filling material 25b such as earth and sand or stone is provided inside the corrugated pipe 25a. The corrugated pipe 25a is coupled to the support column 12 by a coupling member 26 such as a plurality of endless wires.

  The corrugated pipe 25a is a corrugated tube or a spiral grooved tube having a circular cross section having a diameter of about 500 to 2000 mm, and has corrugated portions that are repeatedly corrugated in an arcuate or spiral shape over its entire length. Open or bottomed ones are used.

  As the filling material 25b in the corrugated pipe 25a, the material stored in the bag 19b2 that can be lifted by the wire 19b1 shown in FIG. 12 may be applied.

  In this way, by using the corrugated pipe 25a and filling the inside filling material 25b therein, the impact energy of the falling object 20 can be absorbed by deformation of the corrugated portion of the corrugated pipe 25a.

  As the cylindrical body, in addition to the corrugated pipe 25a, a metal tube such as a steel tube having a diameter of about 500 to 2000 mm or a square tube and a resin tube such as FRP may be used.

  Since it is a configuration in which the filling material 25b is filled in the cylindrical body other than the corrugated pipe 25a or the corrugated pipe 25a erected along the support column 12, construction and maintenance are easy, Unlike the case, there is no possibility that the filling material 25b jumps out from the gap of the case at the time of falling object collision, and the support member 18 can be maintained in the initial state against a strong impact.

(Ninth embodiment)
FIG. 16 shows a ninth embodiment which is a modification of the eighth embodiment. A hole 11b is dug in the mountain-side installation surface 11 of the support column 12, and an upper or lower end opening or bottomed corrugate is formed in the hole 11b. The pipe 25a is embedded, the inside filling material 25b is filled therein, and the column protection member 18 is installed, and the impact of the fallen object 20 can be shared on the ground via the column protection member 18.

(Tenth embodiment)
FIGS. 17 and 18 show a tenth embodiment of the present invention, showing a modification in which the buffer housing 19 of the column protection member 18 is coupled to the column 12 by the coupling member 26, as shown in FIG. Each support 12 and each support member 18 are fixed to each support member 12 and each support member 18 by wrapping a connecting member 26 such as an endless wire passing through the protective face member 16 in a plurality of stages in the vertical direction. .

  In this way, when each column protection member 18 is connected to each column 12 by a plurality of vertical coupling members 26, it is more vertically connected than when connected to the horizontal rope member 13. Further, as shown in FIG. 18, since the horizontal rope member 13 is not restrained, the degree of freedom of the horizontal rope member 13 is large. Since it is slidable, it is difficult to place a burden on the horizontal rope member 13, and the durability of the horizontal rope member 13 can be improved.

(Eleventh embodiment)
FIG. 19 shows an eleventh embodiment of the present invention, in which a buffer housing 19 of a column protection member 18 has a shape that can move relatively within a movable range within a predetermined range. A modification example in which the protective surface body 16 is coupled to the longitudinal spacing member 15 by 26A is shown.

  Thus, when the support member 18 is connected to the spacing member 15 by the connecting member 26A, the connecting position in the vertical direction can be freely selected as compared to the case where the support member 18 is connected to the horizontal rope member 13. .

  Next, a method for determining the energy absorbed by the support column 12 and determining the specification of the support member 18 will be described with reference to FIGS.

(Method 1: Method of obtaining the energy absorbed by the strut 12 from the law of conservation of momentum)
Assume that the collision between the fallen object 20 such as a falling rock and the column protection member 18 and the column 12 is a perfect plastic collision, and from the momentum conservation law, the kinetic energy Eo immediately before the collision of the fallen object 20 of mass M (presumable value) The energy sharing rate α, which is the ratio of the energy E absorbed by the support column 12 to) is given by the following equation.

α = 1 / (1 + m / M) (1) Formula M: Mass of fallen object 20 (possible value)
m: Sum of the mass of the column protection member 18 related to the collision and the equivalent mass of the column 12 (however, the mass of the column protection member 18 related to the collision is a mass in the range shown by the oblique lines in FIG. Is ignored if it is smaller than the mass of the column protection member 18 related to the collision, and m = the mass of the column protection member 18 related to the collision may be used.)

The energy E absorbed by the column 12 is
E = α · Eo = Eo / (1 + m / M) (2)

Then, the energy E1 that can be absorbed by the column 12 is obtained for each column 12,
E ≦ E1 (1) The value of m is determined so that the inequality of expression (3) is established, and the specifications (material, width, thickness, etc. of the filling material) of the column protection member 18 related to the collision are determined.

That is, from the equations (2) and (3),
Since Eo / (1 + m / M) ≦ E1 (4), the column protection member 18 related to the collision can be changed by changing the specifications of the column protection member 18 (material, width, thickness, etc. of the filling material). The mass m is adjusted to satisfy the formula (4).

  In other words, the first technique is that when the equivalent mass of the column 12 is sufficiently smaller than the mass of the column protection member 18 involved in the collision, the energy E absorbed by the column 12 is less than the energy E1 that can be absorbed by the column 12. Thus, the mass m of the column protection member 18 related to the collision is determined from the equation (4). The specifications of the column protection member 18 (material, width, thickness, etc. of the filling material) may be determined so that this mass m is obtained.

(Method 2: Method of obtaining the energy absorbed by the column 12 from the constant energy law )
As shown in FIG. 21, a column protection member B is installed on the rigid foundation A, and a falling object collision experiment in which a falling object C is dropped on the column protection member B is performed under various conditions.

  That is, the fall conditions (the mass of the fallen object, the fall height or the drop collision speed) of the fallen object C and the specifications of the column protection member B (the material, width, thickness, etc. of the filling material) are changed. And the relationship with the generated impact force P is measured and arranged in advance.

  For example, the mass of the fallen object C and the fall height are generated for each of various specifications of the column protection member B shown in FIGS. 22 (a), (b), (c),..., (N). A material that is converted into data by measuring the relationship with the impact force P is created and stored in a memory such as a personal computer.

  Then, the design is started, and first, the design fall conditions such as falling rocks that are expected at the place where the column 12 of the protective fence 10 is installed, that is, the expected mass of the fallen object 20 and the fall height (or fall collision speed). The collision action position and action direction are determined.

  Then, as shown in FIG. 23, assuming that the support column 12 is not plastically deformed, the relationship between the impact force P and the displacement δ of the support column 12 at the point where the impact force P acts is obtained.

  As shown in FIG. 24, the actual strut 12 undergoes elasto-plastic deformation having a portion OC that is elastically deformed below the yield load Py and a portion CD that is plastically deformed when the yield load Py is exceeded. Assuming that the maximum displacement maintaining Py is the ultimate displacement δmax, the area of the trapezoid OCDE including the two-point DE corresponding to this ultimate displacement δmax is the energy E1 that can be absorbed by the column 12.

Based on the constant energy law , the allowable elastic displacement δ _Ea is determined so that the area of the trapezoidal OCDE is equal to the area of the triangular OAB formed by the P-δ curve when elastic deformation is assumed. The impact force is an allowable design drop impact force (hereinafter referred to as an allowable impact force) P _Da .

Finally, returning to FIG. 22, the impact force P on the rigid foundation obtained in the falling object collision experiment on the rigid foundation A shown in FIG. 21 is less than the allowable impact force P _{Da with} respect to the design drop condition. Next, the specifications (material, width, thickness, etc. of the filling material) of the column protection member B are determined. For example, the specification of the column protection member B shown in FIG.

In short, Method No. 2 is a data that is obtained by measuring the relationship between the mass of the fallen object C, the fall height, and the generated impact force P for each of the various specifications of the column protection member B in the fallen object collision experiment. It leaves create, design drop impact force from design falling condition of falling objects 20 which are expected to above relationship (hereinafter, simply referred to as impact force) seeking P _D, assuming that the struts 12 do not plastically deform, impact The elastic displacement δ _E of the column 12 with respect to the force P _D is obtained, and the elastic energy E 2 (= P _D · δ _E · 1/2) represented by the area of the triangle OA′B ′ in FIG. The energy that is absorbed by the column 12 when the object 20 collides, and the impact force that the energy E2 absorbed by the column 12 becomes equal to the energy E1 that can be absorbed by the column 12 is the allowable impact force P _Da , strut protective member as impact force P _D is equal to or less than the allowable impact force P _Da Determine 18 specifications (material, width, thickness, etc. of filling material).

(How to use method 1 and 2)
Actually, depending on the combination of the column 12 and the column protection member 18, there are cases where method 1 is appropriate and method 2 is appropriate.

  For example, when the sum m of the mass of the column protection member 18 related to the collision and the equivalent mass of the column 12 is large and the energy sharing ratio α is small, the method 1 is applied, and the buffer effect of the column protection member 18 is high. If the generated impact force P is small, Method 2 is applied. For method 1 and method 2, the one that is advantageous in terms of design may be applied.

  That is, as the filling materials 19b and 25b, synthetic resin foams such as foamed polystyrene, foamed polyethylene, foamed polypropylene, and foamed urethane may be used in addition to crushed stones and rocks. When the filling members 19b and 25b of the support member 18 are made of a synthetic resin foam, the support member 18 is easy to handle.

  In any method, the specifications of the column protection member 18 are determined so that the energy absorbed by the column 12 when the falling object 20 collides is equal to or less than the energy that can be absorbed by the column 12.

  According to the method 1, by determining the mass of the column protection member 18 involved in the collision so that the energy absorbed by the column 12 is equal to or less than the energy that can be absorbed by the column 12, the column protection member 18 is determined from this mass. The specifications (material, width, thickness, etc. of the filling material) can be easily changed. For example, according to the situation of the site where the column 12 is installed, the determined mass can be obtained. The combination of the material of the filling material 19b and the shape, width, and thickness of the column protection member 18 can be freely changed.

According to Method 2, the impact force at which the energy absorbed by the column 12 is equal to the energy that can be absorbed by the column 12 is defined as the allowable impact force P _Da , and the expected impact force P _D of the fallen object 20 is the allowable impact force P by determining the specifications of the strut protective member 18 such that _Da or less, can be appropriately controlled impact force P _D falling objects 20 by the pillar protection member 18.

  In both method 1 and method 2, for convenience of explanation, the specifications of the strut protection member 18 are determined so as to satisfy the design conditions without changing the specifications of the strut 12 (rigidity, strength, and amount of energy that can be absorbed). As described above, in the actual design, the above specifications of the support column 12 are also elements determined by the design.

  As mentioned above, although each embodiment of this invention was explained in full detail, this invention is not limited to each said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, the frame-like frame body 19a constituting the buffer housing 19 may be formed of a hard member such as a curable plastic or a wooden material other than a metal. In addition, from the viewpoint of cost reduction and construction period shortening, it is also possible to use a panel-type assembly type frame-like frame body that can be assembled and filled with a filling material 19b such as crushed stone at the construction site.

  In addition, the present invention is a reinforcing structure that is also applied to an existing protective fence in which a plurality of support columns are installed at intervals, and a protective surface body such as a horizontal rope member is provided between the support columns.

  The present invention can be used by a business operator who manufactures, sells, or constructs a protective fence.

10 Guard fence
11 Installation surface
12 props
12A movable prop
13 Horizontal rope material
15 Spacing material
16 Protective face
16A protective face
16B Mountain side protective face
18 Prop protection member
19 Buffer housing
19V Triangle buffer housing
19W trapezoidal shock absorber
19Y cylindrical shock absorber
19a bowl-shaped frame
19b Filling material
19b2 bag
19b4 rebar
19b5 wire mesh container
20 Falling objects
21 Engagement member
22 cushioning material
25a Corrugated pipe as a tubular body
25b Filling material
26, 26A coupling member

Claims (16)

A plurality of supports installed at intervals on the installation surface;
A protective face that is supported by these columns and locks the fallen object,
A strut protection member that is installed along each strut at a position close to the falling object collision side of each strut and protects the strut from falling objects ,
The protective face body has a horizontal rope material of a plurality of steps in the vertical direction provided between a plurality of support columns,
These horizontal rope members are provided so as to be slidable in the length direction of the rope with respect to the columns and column protection members . Claims, characterized in that it comprises an engagement member in the vertical direction a plurality of stages of engaging so as to be relatively sliding the strut protective member rope longitudinally relative horizontal rope materials up and down direction a plurality of stages Item 1. A reinforcing structure for a protective fence according to item 1. The reinforcing structure for a protective fence according to claim 1 or 2, wherein the support member for the support is a buffer housing in which a filling material is filled in the housing. The reinforcement structure for a protective fence according to any one of claims 1 to 3, wherein the support member for the support is stackable in a plurality of stages in the vertical direction. The reinforcement structure of the protection fence in any one of Claim 1 thru | or 4 provided with the shock absorbing material arrange | positioned between the support | pillar and the support | pillar protection member. 6. The protective fence reinforcement structure according to claim 5, wherein the cushioning material is formed of a synthetic resin foam. A mountain-side protective surface provided separately from the protective surface between the columns between the mountain-side of the column protective members,
The movable support | pillar which was arrange | positioned between the protection face body between support | pillars and the mountain side protection face body, and was engaged with the protection face body between support | pillars by the up-down direction in multiple steps | paragraphs was provided. Or a protective fence reinforcement structure. The reinforcing structure for a protective fence according to claim 3, wherein the bowl-shaped frame body is provided so as to be able to be lifted in a state in which the filling material is contained. The reinforcing structure for a protective fence according to claim 1, wherein the support member for the support is a cylinder body standing upright along the support and filled with a filling material. The reinforcing structure for a protective fence according to claim 9, wherein the tubular body is a corrugated pipe having a corrugated portion. The reinforcing structure for a protective fence according to claim 3 or 9, wherein the filling material of the column protection member is stored in a bag-like body that can be lifted. The reinforcing structure of the protective fence according to claim 3, wherein the filling material of the column protection member is housed in a wire mesh container reinforced by a rebar that can be lifted. The reinforcing structure for a protective fence according to claim 3, wherein the filling material for the support member is a synthetic resin foam. The protective surface body has a vertical spacing member provided between a plurality of horizontal rope members in the vertical direction,
The strut protection member is connected to the strut or spacing member by a coupling member,
The reinforcing structure for a protective fence according to claim 1, wherein the lateral rope member is slidable in the rope length direction with respect to the column and the column protection member. The reinforcement fence reinforcement structure according to any one of claims 1 to 14, wherein the mass of the column protection member involved in the collision is determined so that energy absorbed by the column is equal to or less than energy that can be absorbed by the column. . The impact force at which the energy absorbed by the support is equal to the energy that can be absorbed by the support is defined as the allowable impact force.
The protection fence reinforcement structure according to any one of claims 1 to 14, wherein the specification of the column protection member is determined so that an expected impact force of a fallen object is equal to or less than an allowable impact force.

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