JP2012077496A - Rock fall prevention device and manufacturing method for the same, and energy control type rock fall protective net method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the friction force of a buffer wire part while improving assembling property.SOLUTION: There is provided a buffer implement 11 allowing a buffer wire material part 15 of a rockfall preventing wire material to slide at the occurrence of tension of a predetermined value or more in the rockfall preventing wire material. In the buffer implement 11, first flat plate pieces 25 and second flat plate pieces 26, through which the buffer wire material part 15 penetrates and which are juxtaposed in the lengthwise direction of the buffer wire material part 15 and fixed to the rockfall preventing wire material side, are repeatedly arranged. A first penetration part 41 through which the buffer wire material part 15 penetrates in the first flat plate piece 25 is deviated from a second penetration part 42 through which the buffer wire material part 15 penetrates in the second flat plate piece 26. The buffer wire material part 15 becomes wave-shaped and the buffer wire material part 15 is brought into such a state as if it is bit by corners at contact angles P between parts obliquely upward inclined 15C and the second penetration parts 42.

Description

  The present invention relates to a rockfall prevention device that prevents rockfall from rolling onto a road or the like, a manufacturing method thereof, and an energy-controlled rockfall protection net construction method when rockfall occurs on a slope.

  As a rock fall prevention method to be installed on a slope, conventionally, the entire slope is covered with a protective body of appropriate strength, which is composed of vertical and horizontal ropes assembled in a wire mesh and a grid, and the protective body is a fixing device installed on the slope. A cover-type rock fall protection net construction method is adopted in which the rock fall generated on the slope is sandwiched between the slope and the protection body and guided to the lower side so that it does not roll on the road or the like.

  Or, if there is a rockfall source at the upper part of a long slope, set up multiple pillars horizontally on the slope, and suspend the protective body from the pillar to the slope bottom of the slope to generate rockfall When falling rocks are generated from the source, they are received by the pillars in the opening provided in the upper part of the protective body, and then the falling rocks are sandwiched between the slope and the protective body and guided downward, on the road, etc. There are known pocket-type rockfall protection net construction methods that prevent rolling out.

JP 2010-24729 A

  The following problems have been pointed out in the prior art.

  The cover type rock fall protection net construction method of the prior art is a construction method based on the permissible strength of the protection body composed of a wire net and vertical and horizontal ropes and the energy absorption capacity of the metal net and vertical and horizontal ropes as basic elements.

  Therefore, the effect cannot be exerted against falling rocks of a scale exceeding the allowable strength of the wire mesh and the rope or exceeding the limit of the energy absorption capacity of the wire mesh and the rope. In order to increase the strength of the protective body, the distance between the ropes is narrowed, the number of rope members is increased, or the number of reinforcing ropes is increased to improve the strength. Or cost-effective issues. On the other hand, an unexpected external force may be generated on a slope in a natural environment, and a large impact force is encountered due to unexpected failure energy. When such a situation occurs, there is a concern that a part or the whole of the protective body may be damaged without being able to endure due to an unexpected impact force, resulting in falling rocks.

  The problem to be solved is to provide an energy-controlled rockfall protection net construction method that can control and attenuate the energy of falling rocks in the whole falling rock protection net equipped with an energy control device. Is a point. And this invention was made in order to solve the problems included in the above-mentioned prior art, and improved workability, safety, and impact force of falling rocks below the allowable strength of falling rock protectors. The purpose of this project is to provide an energy-controlled incomplete protection netting method equipped with an energy control device that can be relaxed. In addition, in the rockfall prevention device equipped with a shock absorber that allows sliding of the buffer wire portion connected to the rock fall prevention wire material such as wire rope and wire mesh, the frictional force with the buffer wire portion is increased and the assembly is excellent. It is a point to do.

The invention according to claim 1 provides a plurality of rock fall prevention wires such as rope members and nets on an inclined surface, covers the slope, connects the rock fall prevention wire to a fixture provided on the ground, and the rock fall prevention wire. In a rockfall prevention device provided with a shock absorber that allows sliding of the buffer wire portion of the rockfall prevention wire when a predetermined tension or more is generated,
The buffer device includes the first and second pieces that are fixed to the fixture side and are repeatedly arranged while the buffer wire portion penetrates and is arranged in parallel along the longitudinal direction of the buffer wire portion. The first penetrating portion through which the buffer wire portion in the first piece penetrates is displaced with respect to the second penetrating portion through which the buffer wire portion in the second piece penetrates. Is a rock fall prevention device.

  The invention according to claim 2 is characterized in that the shock absorber is provided with a casing having a base end connected to the fixture side and provided with an insertion hole into which the buffer wire portion is inserted from the front end, and the base from the front end side of the casing. A first flat plate piece and a second flat plate piece arranged side by side in the insertion hole along the end side are repeatedly arranged, and the buffer wire portion in the first flat plate piece penetrates. The rock fall prevention device is characterized by being displaced with respect to the first penetrating portion with respect to the second penetrating portion through which the buffer wire portion of the second flat plate piece penetrates.

  According to a third aspect of the present invention, the casing is cylindrical, and the divided casings divided by the dividing surface including the center line are abutted and fixed integrally, and the first flat plate piece and the second flat plate are fixed. Each of the pieces has a front surface and a back surface perpendicular to the buffer wire portion formed in a substantially elliptical shape or a substantially rectangular shape, and the outer peripheral surfaces of the first flat plate piece and the second flat plate piece are the inner periphery of the casing, respectively. Fitted to the surface, the first penetrating portion is provided in the center of the first flat plate piece, and the second penetrating portion is displaced in the long side direction of the second flat plate piece. The rock fall prevention device according to claim 2, wherein the device is a rock fall prevention device.

  The invention according to claim 4 is characterized in that a spacing retaining ring having a third penetrating portion through which the buffer wire portion passes is interposed between the first flat plate piece and the second flat plate piece. The rock fall prevention device according to any one of claims 1 to 3.

  According to a fifth aspect of the present invention, the casing has a cylindrical shape, and is divided and fixed integrally by abutting a divided casing divided vertically with the insertion hole by a dividing surface including a center line thereof. The second flat plate piece has a front surface orthogonal to the buffer wire portion and a back surface thereof formed in a substantially elliptical shape or a substantially rectangular shape, and the buffer wire portion is repeated to the first through portion and the second through portion. After the insertion of the first flat plate piece and the second flat plate piece into the divided split insertion holes on the lower side, the buffer wire portion is kept in a horizontal state. The divided casing on the side is integrated with the divided casing on the upper side, and the outer peripheral surfaces of the first flat plate piece and the second flat plate piece are fitted to the inner peripheral surface of the casing, respectively. 1 through portion in the center of the first piece To provided, a method producing rock fall prevention device, characterized in that the second penetrating portion was displaced in the longitudinal direction of the second piece.

  According to the sixth aspect of the present invention, an energy control unit composed of a U-bolt, a connection terminal, a control rope, and a shock-absorbing bracket is connected to a fixture that fixes the vertical and horizontal ropes to the slope. It has a function of deforming into a continuous wave shape and gripping, and when a force exceeding the deformation gripping force in one direction is applied to the shock absorber, the control rope is deformed into a continuous wave shape, An energy-controlled rockfall equipped with an energy control unit that converts the action energy into the energy required to continuously deform the control rope into a wave shape when moving in the direction of generation, and the action energy decay action occurs It is a protective net construction method.

  In the invention of claim 7, the slope is covered with a wire mesh, a rope assembled in a lattice shape is arranged thereon, and the upper end portion of the vertical rope and the both end portions of the horizontal rope are connected to a fixture installed on the slope surface. Connected to the energy control unit, and at the intersection of the vertical and horizontal ropes, a cross metal fitting that deforms and grips the vertical and horizontal ropes into a continuous corrugated shape is arranged. The energy control formula is characterized by the fact that the cross metal fitting is equipped with a cross metal fitting that generates a damping action when the cross metal fitting moves in the direction of the action force while converting it into the energy required to transform it into a continuous wave shape. This is the rock fall protection net construction method.

  The invention according to claim 8 is characterized in that a rockfall guard body composed of a wire mesh covering a slope and a rope assembled in a lattice shape is laid on the slope in two upper and lower stages, and the rockfall guard body divided into two upper and lower stages is The upper and lower rock fall guards are laid on top of each other at a certain rate on top of each other so that the upper paragraph stone guards are on top of each other. Are connected to an energy control unit connected to a fixture installed on the slope, and further, a lower end of the vertical rope of the upper paragraph stone protector and a lowermost lateral rope of the upper paragraph stone protector, Connected with a three-way clip, the horizontal rope of the upper paragraph stone guard is connected to an energy control unit connected to a fixture installed on the slope.

  The lower stage of the defensive protector is laid from the place where it is overlapped with the upper paragraph stone protector at a certain rate to the predetermined part of the slope, and the upper end of the vertical rope of the lower paragraph stone protector is the upper paragraph stone protector The upper end of the vertical rope is connected to a control rope extended from the connected energy control unit via a buffer fitting, and the lower end of the vertical rope is connected to a fixture installed on the slope. The horizontal rope of the lower paragraph stone protector is connected to the energy control unit connected to the fixtures installed on the slope, and the vertical and horizontal ropes are transformed into a continuous wave shape at the intersection of the vertical and horizontal ropes of the upper and lower falling rock guards. When the cross fitting is moved and the cross fitting is moved in the direction of the applied force while converting the vertical and horizontal ropes into the energy required to deform into a continuous wave shape This is an energy-controlled rockfall protection net construction method that is equipped with a cross fitting that generates a damping action.

  In the invention of claim 9, a plurality of support columns are arranged horizontally on a slope, a falling rock protector composed of a wire mesh and vertical and horizontal ropes is suspended from the support column, and both ends of the horizontal rope are installed on the slope. Connected to the energy control unit connected to the fixed fixture, and the crossing part of the vertical and horizontal ropes is arranged with a cross metal fitting that deforms and grips the vertical and horizontal ropes into a continuous corrugation, and a force exceeding the gripping force is applied The cross metal fitting is equipped with a cross metal fitting that generates a damping action when the cross metal fitting moves in the direction of the acting force while converting the vertical and horizontal ropes into energy necessary to transform into a continuous wave shape. This is an energy-controlled rockfall protection net construction method.

  The invention of claim 10 has a plurality of support columns arranged horizontally on a slope, a falling rock protector composed of a wire mesh and vertical and horizontal ropes, suspended from the support columns, and laid to a predetermined location on the slope, Connect both ends of the horizontal rope to the energy control unit connected to the fixture installed on the slope. In addition, a rockfall protection body different from the rockfall protection body described above is superimposed on the lower part of the upper paragraph stone protection body suspended from the support so that it covers from a certain ratio from above, and is laid to a predetermined position on the slope. The both ends of the horizontal rope are connected to an energy control unit connected to a fixture installed on the slope. Moreover, the upper end part of the vertical rope of the lower paragraph stone protector is connected to the control rope connected to the support via a buffer fitting, and the end part of the vertical rope is connected to a fixture installed on the slope.

  At the intersection of the vertical and horizontal ropes of the upper and lower rockfall protection bodies, a cross fitting is arranged that grips the vertical and horizontal ropes by transforming them into a continuous corrugation, and when a force greater than the gripping force is applied, the vertical and horizontal ropes are continuous. An energy-controlled rockfall protection net equipped with a cross fitting that generates a damping action when the cross fitting moves in the direction of the acting force while converting it into the energy required to transform it into a corrugated shape. It is a construction method.

  The invention of claim 11 is the energy-controlled rockfall protection net construction method according to any one of claims 6 to 9, wherein the vertical and horizontal ropes are fixed to the slope in order to fix the vertical and horizontal ropes to the slope. The energy control unit is connected to the energy control unit, and the vertical and horizontal ropes are fixed to the energy control unit. Equipped with an energy control unit that causes the action force to be attenuated when moving in the direction of the action force while converting the control rope into the energy required to transform the control rope into a continuous wave shape. It is an energy-controlled rockfall protection net construction method.

  According to the first aspect of the present invention, the buffer wire portion is guided by one of the penetrating portions by penetrating the first penetrating portion and the second penetrating portion in a deviated state repeatedly into a corrugated shape. Friction is reliably generated at the other penetrating portion where the buffer wire portion is displaced, and sliding of the buffer wire portion of the rock fall prevention wire material can be allowed when a predetermined tension or more is generated.

  According to the invention of claim 2, the buffer wire portion is repeatedly formed in a wave shape by penetrating the first through portion and the second through portion which are in a deviated state in the casing. Friction is surely generated at the other penetrating portion where the guided buffer wire portion is displaced, and the sliding wire portion of the rock fall prevention wire member can be allowed to slide when a predetermined tension or more is generated. it can.

  According to invention of Claim 3, a 1st flat plate piece and a 2nd flat plate piece are formed in a substantially elliptical shape or a substantially rectangular shape, and a 1st flat plate piece and a 2nd flat plate piece are casings. It can be positioned and fitted inside.

  According to invention of Claim 4, it will be in a fixed state reliably in a casing and the reduction | decrease of the said friction can be prevented.

  According to invention of Claim 5, after inserting a buffer wire part repeatedly in a 1st penetration part and a 2nd penetration part, the 1st flat plate piece and the 2nd flat plate piece are arranged in parallel. Before the buffer wire portion is kept in a horizontal state and the first flat plate piece and the second flat plate piece are accommodated in the insertion holes of the divided casings on the lower side, the second flat plate piece is vertically long. When the upper divided casing is covered with the buffer wire portion, the first flat plate piece, and the second flat plate piece stored in the lower divided casing, the first penetrating portion can be easily covered. On the other hand, the second penetrating portion can be displaced and assembled.

  According to the sixth aspect of the present invention, the continuous wave-shaped sliding of the buffer wire portion can be allowed by the energy control unit to prevent falling rocks.

  According to the seventh aspect of the present invention, rock fall can be prevented by the energy control unit and the cross metal fitting.

  According to the eighth aspect of the present invention, the continuous wave-shaped sliding of the buffer wire portion of the energy control unit can be allowed by the cross metal fitting to prevent falling rocks.

  According to the ninth aspect of the present invention, continuous wave-shaped sliding can be allowed in the energy control unit to prevent falling rocks.

  According to the invention of claim 10, it is possible to prevent falling rocks by allowing continuous wave-shaped sliding in the energy control unit.

  According to the invention of claim 11, it is possible to reliably prevent falling rocks by allowing continuous wave-shaped sliding in the energy control unit.

It is a whole front view which shows Example 1 of this invention. It is a whole perspective view of the energy control unit. It is a disassembled perspective view of the energy control unit from the fixture side. It is a disassembled perspective view of the energy control unit from the connection terminal board side. It is a disassembled perspective view of the buffer device. It is a perspective view of the buffer device. It is a perspective view which shows the assembly order of the buffer device. It is sectional drawing before the assembly of the buffer device. It is sectional drawing of the assembly state of the buffer device. It is sectional drawing of the assembly arrangement state of the 1st, 2nd flat plate piece and a space | interval holding | maintenance ring. It is a perspective view which shows the assembly order of the connection terminal. It is a front view of the cross metal fitting. It is a rear view of the cross metal fitting. It is a front view of the cross metal fitting before an assembly same as the above. It is an AA arrow directional view of FIG. 14 same as the above. FIG. 16A is a front view, and FIG. 16B is a side view. FIG. 17A is a front view, and FIG. 17B is a side view. It is a disassembled perspective view which shows Example 2 of this invention. It is a disassembled perspective view which shows Example 3 of this invention. It is a front view after the assembly which shows Example 4 of this invention. It is a front view before the assembly showing Example 4 of the present invention. It is sectional drawing which shows Example 5 of this invention. It is sectional drawing which shows Example 6 of this invention.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. The members constituting the energy-controlled fall protection net construction method of the present invention are, as will be described later, a vertical falling rock prevention wire 1 and a horizontal rope that are vertical ropes. Horizontal rockfall prevention wire 2, wire net 3, lock anchors 5, 6, 7, energy control unit 8, vertical reinforcement rockfall prevention wire 9, horizontal reinforcement rope It consists of a reinforced rock fall prevention wire 10, a cross metal fitting 16, a cross clip 17 and a three-way clip 19.

  Details of each member will be described below. As shown in FIG. 1, a vertical rock fall prevention wire 1 made of wire rope arranged in a lattice shape, a horizontal rock fall prevention wire 2 and a slope cover portion 4 made of a metal mesh as a net 3, and an anchor for fixing the cover portion 4. The upper part, one side and the other side fixing parts 5, 6, 7 and the rockfall energy interposed between the covering part 4 and the fixing parts 5, 6, 7 are controlled and relaxed, and the covering part 4 and the fixing parts 5, 6, 7 , And an energy control unit 8 that protects against the impact force of falling rocks. As illustrated in FIG. 2, the energy control unit 8 includes a connection terminal 12, an anchor connection U bolt 13, a rope connection bolt 14, a buffer wire portion 15 that is a control rope, and a shock absorber 11 that is a buffer fitting. This energy control unit 8 has a function of holding the buffer wire 11 by deforming the buffer wire portion 15 into a continuous wave shape inside the shock absorber 11 with the shock absorber 11 as a unit component, When this tension is applied, the force is moved in the direction in which the tension is generated while converting the force into energy that deforms the buffer wire portion 15 into a continuous wave shape.

  Then, one side end of the sideways rock fall prevention wire 2 and the other side end are driven into an inclined surface (ground) and fixed to one side of the anchor and the other side fixtures 6 and 7, respectively, to prevent the vertical fall rockfall. The upper end side of the wire rod 1 is connected to an upper fixture 5 such as an anchor that is driven and fixed to an inclined surface (ground) to prevent the floating stone from falling onto a road or the like.

  Further, a vertical reinforcing rock fall prevention wire 9 is arranged in parallel with the vertical rock fall prevention wire 1 in the middle of a pair of left and right vertical rock fall prevention wires 1 adjacent to each other. Further, a lateral reinforcing rock fall prevention wire 10 is arranged in parallel with the lateral rock fall prevention wire 2 in the middle of a pair of upper and lower horizontal fall rock prevention wires 2 adjacent to each other.

  The vertical energy control unit 8 is connected to the upper end side of the vertical rock fall prevention wire 1. As shown in FIG. 2, the energy control unit 8 includes a buffer device 11, a connection terminal 12, an anchor connection U bolt 13, a rope connection bolt 14, and a buffer wire member 15 that is a buffer wire member 15. Similarly, the energy control unit 8 is mounted on one side and the other side of the sideways falling rock prevention wire 2.

  In the energy control unit 8, when a falling rock occurs in the net 3, when a predetermined load is applied to the shock absorber 11, the shock absorber 11 starts moving along the shock absorbing wire member 15 in the load direction, and is vertically oriented. While falling rock energy exceeding a predetermined load is acting on the rock fall prevention wire 1 and the like, the movement continues while maintaining the predetermined load, and by moving, the rock falling energy is converted into the moving energy of the buffer 11 and falling rock It has the function of controlling and attenuating energy. The shock absorber 11 stops moving when the rock fall energy acting on the vertical rock fall prevention wire 1 or the like is below a predetermined load or disappears.

  The upper fixing portion 5 is connected to the base end 11A side of the shock absorber 11 via a buffer wire member 15, a connection terminal 12, and a U bolt 13, and the tip 11B of the shock absorber 11 is connected via a rope connection bolt 14. The upper end 1 </ b> A side that is the end of the vertically falling rock prevention wire 1 is connected.

  A cross metal fitting 16 serving as a cross-shaped sliding guide metal fitting is disposed at the intersection of the vertical reinforcing rock fall prevention wire 9 and the horizontal rock fall prevention wire 2. As shown in Japanese Patent Application Laid-Open No. 2010-24729 by the same inventor, the cross metal fitting 16 crosses the vertically reinforced falling rock prevention wire 9 and the transverse falling rock prevention wire 2 having frictional resistance in the longitudinal direction. It can be done.

  A cross clip 17 serving as a cross-shaped fixing metal fitting is disposed at an intersection other than the cross metal fitting 16 such as the vertical reinforcement rock fall prevention wire 9 and the horizontal rock fall prevention wire 2 or the horizontal reinforcement rock fall prevention wire 10.

  There are three points at the intersection of the upper end of the vertically reinforced rock fall prevention wire 9 and the uppermost horizontal rock fall prevention wire 2, the intersection of the lower end of the vertical reinforcement rock fall prevention wire 9 and the lowermost horizontal rock fall prevention wire 2, etc. A three-way clip 19 called a fixing bracket or the like is arranged. The three-way clip 19 can fix the ends of the vertically reinforced rock fall prevention wire rod 9 and the lateral reinforcement rock fall prevention wire rod 10.

  Further, an anchor connection U-bolt 13 is connected to a connection jig 21 fixed to the upper fixture 5 via an anchor nut 20, and the connection terminals 12 are nuts at both ends of the anchor connection U-bolt 13. It is fixed via 13A, and the base end 15A side of the buffer wire portion 15 is connected to the connection terminal 12. The tip 15B of the buffer wire portion 15 is inserted into the buffer device 11 in front of the connection terminal 12.

  An upper end portion 1A of the vertically falling rock prevention wire 1 is connected to a connection terminal 22, and the connection terminal 22 is connected to a casing 24 of the shock absorber 11 via a pair of left and right connection bolts 14. The shock absorber 11 includes a substantially cylindrical casing 24, a first flat plate piece 25, which is a piece called a piece or the like housed in the casing 24 in a state of being arranged in parallel in the longitudinal direction of the casing 24, A flat plate piece 26 is provided. The casing 24 is provided with a penetrating portion 27 that forms an insertion hole through which the buffer wire portion 15 penetrates on a center line X in the longitudinal direction. And the circular cross-sectional areas of the proximal end side port 28 and the distal end side port 29 of the penetrating portion 27 on the distal end side are the sectional areas of the penetrating portion 27 between the proximal end side port 28 and the distal end side port 29 (intermediate through portion described later) 37) and the cross section of the penetrating portion 27 is formed in an elliptical shape. The casing 24 is divided into two vertically by dividing surfaces 30 and 31 including the center line X, and has a pair of divided casings 32 and 33. These divided casings 32 and 33 can be coupled with bolts and nuts 34 as connecting tools at the four corners of the opposed divided surfaces 32 and 33, and the pair of divided casings 32 and 33 have rope connection bolts respectively. A receiving hole 35 through which 14 passes is provided, and the bolt 14 that has passed through is fixed to and connected to the receiving hole 35 by a nut 36. The intermediate through portion 37 having an elliptical cross section located between the proximal end side port 28 and the distal end side port 29 in the through portion 27 has a long diameter Y which is the long side of the cross section, and the dividing direction of the pair of divided casings 32 and 33 Therefore, the minor axis Z, which is the short side of the cross section, coincides with the dividing surfaces 30 and 31.

  A plurality of first flat plate pieces 25 and second flat plate pieces 26 arranged in parallel with the intermediate through portion 37 are repeatedly stored along the center line X. A space holding ring 38 called a spacer or the like, a second flat plate piece 26, a space holding ring 38, a first flat plate piece 25, a space holding ring 38, a second flat plate along the base end side port 28 It arrange | positions repeatedly like the piece 26, the space | interval holding ring 38, the 1st flat plate piece 25 ....

  The first flat plate piece 25 and the second flat plate piece 26 have a flat plate shape with a thin thickness in the center line X direction, and the outer peripheral surfaces 25A and 26A of the orthogonal surface and the back surface thereof are intermediate through portions. It is formed in an elliptical shape congruent with the cross section of the intermediate through portion 37 so as to be fitted to the inner peripheral surface 40 of 37. And the 1st penetration part 41 which the buffer wire part 15 penetrates in the center of the 1st flat plate piece 25, ie, the intersection of the long diameter Y and the short diameter Z, is formed in the centerline X direction.

  Further, a first through portion 41 through which the buffer wire member 15 can penetrate is formed in the center of the first flat plate piece 25, that is, on the center line X. A second penetrating portion 42 is provided that is displaced from the center of the second flat plate piece 26, that is, parallel to the center line X. The diameter of the second penetrating portion 42 is the same as the diameter of the first penetrating portion 41, and the diameter of the first penetrating portion 41, the diameter of the second penetrating portion 42, and the buffer wire member 15 have substantially the same diameter, and the buffer wire member 15 is in a fitted state with almost no gap between the first through portion 41 and the second through portion 42, and the buffer wire member 15 is in the first through portion. The part 41 and the second penetrating part 42 can slide. In the embodiment, the deviation is in the direction of the major axis Y from the center (center line X), and the deviation length H is formed approximately half of the diameter of the second through portion 42.

  Further, the spacing ring 38 has a flat plate shape with a small thickness in the direction of the center line X, and the orthogonal front surface and the back surface thereof are circular, and the third penetration through which the buffer wire portion 15 is loosely inserted in the center. A portion 43 is provided, and the diameter of the third through portion 43 is larger than those of the first through portion 41 and the second through portion 42, and the outer diameter of the spacing ring 38 is short. It is the same or smaller than Z. In the embodiment, the outer diameter of the spacing ring 38 is shorter than the length of the minor axis Z direction, and the center of the spacing ring 38 accommodated in the intermediate through portion 37 is always displaced from the center line X, as will be described later. Further, the buffer wire member 15 can be arranged obliquely upward or obliquely downward.

  In the embodiment, three first flat plate pieces 25, four second flat plate pieces 26, and eight interval holding rings 38 are arranged, and the total length in the center line X direction ( The total length) is the same as the length of the intermediate penetrating portion 37 in the direction of the center line X, and there is no large gap in the direction of the center line X.

  The assembling of the shock absorber 11 is performed by previously connecting the distal end 15B of the buffer wire portion 15 to be connected to the connection terminal 12 with the base end 15A, the third penetrating portion 43 of the spacing ring 38, and the second flat plate piece 26. The second penetrating part 42, the third penetrating part 43 of the spacing ring, the first penetrating part 41 of the first flat plate piece 25, the third penetrating part 43 of the spacing ring 38, the second flat plate The second penetrating portion 42 of the piece 26, the third penetrating portion 43 of the spacing ring 38, the first penetrating portion 41 of the first flat plate piece 25, are inserted in this order, and the buffer wire portion 15 is inserted. A group in which the spacing rings 38 are arranged on both sides is formed. In the case where the buffer wire portion 15 is in a horizontal state and this group is arranged in parallel, the first flat plate piece 25, the second flat plate piece 26, and the interval retaining ring 38 as shown in FIG. Is a state suspended from the buffer wire portion 15, and in this suspended state, the first penetrating portion 41 is disposed at the center of the first flat plate piece 25, so the first flat plate piece The buffer wire portion 15 penetrates through the center of 25. On the other hand, the second penetrating portion 42 is deviated to one of the long diameters Y of the second flat plate piece 26, so that the center of gravity of the second flat plate pieces 26 is deviated to the other of the long diameter Y. Therefore, in the suspended state, one of the long diameters Y faces upward, and the other of the long diameters Y faces downward. The diameter of the third penetrating portion 43 is somewhat larger than that of the buffer wire member 15, and therefore the buffer wire member 15 is loosely inserted into the third penetrating portion 43. Is in a state where it is eccentric with respect to the buffer wire member 15 and hangs down.

  Next, a group of the first flat plate piece 25, the second flat plate piece 26 and the spacing ring 38 arranged in series along the buffer wire portion 15 is sandwiched between a pair of divided casings 32 and 33, and One and the other of the group of outer peripheral surfaces 25A and 26A, in the embodiment, the lower side of the outer peripheral surfaces 25A and 26A and the upper side of the outer peripheral surfaces 25A and 26A are divided into the intermediate through portion 37 of the divided casing 32 on the lower side and the divided on the upper side. When fitted into the intermediate through portion 37 of the casing 33, the upper portion of the first outer peripheral surface 25A of the first flat plate piece 25 comes into contact with the inner peripheral surface 40 of the intermediate through portion 37 of the divided casing 32 positioned above. In addition, the lower part of the second outer peripheral surface 26A of the second flat plate piece 26 abuts on the inner peripheral surface 40 of the intermediate through portion 37 of the divided casing 33 positioned below. At this time, the buffer wire portion 15 is linear, and in this state, no large friction occurs between the buffer wire portion 15 and the first flat plate piece 25 and the second flat plate piece 26.

  Next, as shown in FIG. 9, the first outer peripheral surface of the first flat plate piece 25 is formed by tightening the four corners of the pair of split casings 32, 33 with bolts and nuts 34 and narrowing the pair of split surfaces 30, 31. The upper and lower portions of 25A abut against the inner peripheral surface 40 of the intermediate through portion 37 of the pair of split casings 32 and 33, respectively, and the first flat plate piece 25 is fitted into the intermediate through portion 37 of the casing 24. At the same time, the upper and lower portions of the second outer peripheral surface 26A of the second flat plate piece 26 are in contact with the inner peripheral surface 40 of the intermediate through portion 37 of the pair of upper and lower divided casings 32 and 33, respectively. The piece 26 is fitted into the intermediate through portion 37 of the casing 24. As a result, only the second penetrating portion 42 is displaced upward from the center line X of the shock absorber 11 (deviation length H) so that the shock absorber 11 is gripped by the shock absorber 11. It has become.

  For this reason, the buffer wire portion 15, which is linear, is transferred from the distal end side port 29 on the center line X of the shock absorber 11 to the second through portion 42 via the third through portion 43 of the spacing ring 38. Further, when reaching the first through portion 41 via another adjacent third through portion 43, the second penetrating portion 42 is displaced through the obliquely upward portion 15C. Further, when the second penetrating portion 42 reaches the first penetrating portion 41 via the third penetrating portion 43, the buffer wire portion 15 in the third penetrating portion 43 passes through the diagonally downward portion 15D. . As described above, in the third through portion 43 before and after the second through portion 42, the obliquely upward portion 15C and the obliquely downward portion 15D of the shock absorber 11 are repeatedly arranged. The contact angle portion P between the obliquely upward portion 15C and the second penetration portion 42, the contact angle portion Q between the obliquely downward portion 15D and the second penetration portion 42, the oblique downward portion 15D and the first penetration portion 41, In the contact corner portion R, the contact corner portion S between the first penetrating portion 41 and the next obliquely upward portion 15C, etc., the buffer wire portion 15 bites into the corner portion and generates a high frictional force. Can do.

  As shown in FIG. 11, for example, the connection terminal 12 of the buffer wire portion 15 includes a socket 44 and a wedge-shaped plug 45 which are connection terminals 12 to which the buffer wire portion 15 is connected. Then, the wire rope as the buffer wire portion 15 is inserted into the socket 44, and then the plug 45 is attached to the wire rope at the end face of the wire rope, and further inserted into the socket 44 with the plug 45 attached to the wire rope. Then, a bolt and a support plate plug press-fitting device 46 are attached to the socket 44, the nut 46A is tightened with an impact wrench (not shown), the plug 45 and the socket 44 are crimped, and the plug press-fitting device 46 is removed from the socket 44. To do. In such a processing method of the connection terminal 12, the construction is easy, the connection strength is high, the connection can be surely performed, and a high strength member is obtained.

  Next, the cross metal fitting 16 will be described with reference to FIGS. This cross metal fitting 16 is arranged at the intersection of the vertically oriented rock fall prevention wire rod 9 and the lateral reinforcement rock fall prevention wire rod 10 arranged in a lattice shape, and as described above, Japanese Patent Application Laid-Open No. 2010-24729 by the same inventors. As shown in the official gazette, in the analysis results in the dynamic tensile test, for example, the rock falls along the vertical rock fall prevention wire 1 and the horizontal rock fall prevention wire 2 on which an average load of 22 KN acts. Is converted to kinetic energy, and the rock fall energy is attenuated.

  Cross clip 17 is composed of a cross-shaped metal fitting and four wire clips 50. After attaching the main metal fitting to the crossing portion of the rope, attach the metal fitting and the rope with the wire clip. Is.

  The cross metal fitting 16 is for gripping the rock fall prevention wire rods 1 and 2 at the intersection of the rock fall prevention wire rods 1 and 2 by deforming them into a continuous corrugated shape, The cross metal fitting 16 moves in the direction of the acting force while converting the rock fall prevention wires 1 and 2 into energy necessary to transform into a continuous wave shape.

  The cross metal fitting 16 includes a pair of first metal fittings 61 and second metal fittings 71 as shown in FIGS. 12 to 16, and the first and second metal fittings 61, 71 are used to prevent falling rock prevention wires 1, 1 in the intersecting direction. 2 is pinched respectively.

  In FIG. 14, the first metal fitting 61 shown at the bottom has one side portion 62 and the other side portion 63 that are substantially orthogonal to each other, and similarly, the second metal fitting 72 is similar to the one side portion 72 that is substantially orthogonal to the other side portion. The side part 73 is integrally formed, and the one side part 62 and the other side part 63 of the first metal fitting respectively have mating surfaces 62M and 63M, and corresponding to these mating surfaces 62M and 63M, The other side portion 73 and the one side portion 72 have mating surfaces 73M and 72M, respectively. The mating surfaces 63M and 72M are substantially orthogonal to the mating surfaces 62M and 73M.

  A through hole 61K is formed in the first metal fitting 61 between the one side portion 62 and the other side portion 63 in a direction intersecting with the alignment 62M, 63M. The second metal fitting 71 corresponds to the through hole 61K. A through hole 71K is formed between the one side portion 72 and the other side portion 73 in a direction intersecting with the combined portions 72M and 73M. The through holes 61K and 71K and the mating surfaces 62M, 63M, 72M and 73M form an angle of approximately 45 degrees.

  On one side 62 of the first metal fitting 61, guide ridges 64, 65, 64 are projected outwardly along the mating surface 62M, and spaced apart on both sides of the central guide ridge 65, Guide protrusions 64 and 64 are provided. On the other hand, on the other side portion 73 of the second metal fitting 71, guide protrusions 64 and 64 protrude outward along the mating surface 73M. These guide protrusions 64 and 64 are spaced apart from each other. The guide ridges 64, 65 and the guide ridges 65, 64 of the mating surface 62M are disposed at corresponding positions.

  On the other hand, one side portion 72 of the second metal fitting 71 is provided with guide ridges 64, 65, 64 projecting outward along the mating surface 72M, and spaced apart on both sides of the central guide ridge 65. The guide protrusions 64 and 64 are provided. On the other hand, on the other side portion 63 of the first metal fitting 61, guide protrusions 64 and 64 protrude outward along the mating surface 63M. These guide protrusions 64 and 64 are spaced apart from each other. The guide ridges 64, 65 and the guide ridges 65, 64 of the mating surface 72M are disposed at corresponding positions.

  As shown in FIG. 16, the guide ridge 64 has a curved sliding surface 64B at the bottom of the recess 64A, and as shown in FIG. 17, the guide ridge 65 is formed at the bottom of the recess 65A. It has a curved sliding surface 65B. Further, in the assembled state, the distance between one sliding surface 64B, 65B, 64B and the other sliding surface 64B, 64B is narrower than the diameter of the rock fall prevention wire 3.

  In the figure, reference numeral 81 denotes a bolt inserted into the through holes 61K and 71K, and a nut 82 is screwed to the tip.

  The mating surfaces 62M and 73M are aligned with each other, and the falling rock prevention wire 1 in one direction is arranged between the guide projections 64, 65, 64 on the mating surface 62M side and the guide projections 64, 64 on the mating surface 73M side. 2 and sandwiching the mating surfaces 63M and 72M, the falling rocks in the other direction between the guide projections 64 and 64 on the mating surface 63M side and the guide projections 64, 65 and 64 on the mating surface 72M side When the prevention wires 1 and 2 are sandwiched, the bolt 81 is inserted into the through holes 61K and 71K, and the nut 82 is tightened, as shown in FIGS. 12 and 13, the mating surfaces 62M and 73M and the mating surfaces 63M and 72M are aligned. It moves in the approaching direction, and the falling rock prevention wires 1 and 2 are deformed by the one sliding face 64B, 65B, 64B and the other sliding face 64B, 64B, and the sliding face 64B, 65B and falling rock A high frictional force is generated between the preventing wires 1 and 2. As shown in FIG. 16 and FIG. 17, there are gaps between the mating surfaces 62M and 73M and between the mating surfaces 63M and 72M in the tightened state, and therefore, the tightening torque of the nut 82 should be adjusted. Thus, the rock fall prevention wire 3 can be gripped with an arbitrary frictional force.

  Also, since the rock fall prevention wires 1 and 2 in the crossing direction are gripped independently between the mating surfaces 62M and 73M and between the mating surfaces 63M and 72M, the individual rock fall prevention wires 1 and 2 are compared with the conventional ones. It can be gripped with a predetermined frictional force. The impact energy can be effectively absorbed by the falling rock prevention wires 1 and 2 sliding against the guide protrusions 64 and 65.

  Next, the operation of the above configuration will be described. In assembling the energy control unit 8, the buffer wire member 15 has a first flat plate piece 25 that is a central hole piece, a second flat plate piece 26 that is an eccentric hole piece in the order shown in FIG. The control part consisting of the ring 38 is inserted through. Next, in a state where the buffer wire member 15 and the control part are mounted, the control part is mounted in the intermediate through portion 37 which is a part storage groove of the divided casing 33 below the buffer device 11. Next, they are overlapped and united so as to cover with a split casing 32 above the pair of the same type. The divided casings 32 and 33 of the combined shock absorber 11 are connected by bolts and nuts 34, and the tension control ability is adjusted by the tightening torque of the nuts.

  The shock absorber 11 is composed of two identical metal fittings as a pair, and the buffer wire member 15 into which a control part such as the first flat plate piece 25 is inserted into the pair of split casings 32 and 33 is connected to the intermediate through portion 37. After being stored, the four bolts and nuts 34 are fixed with a predetermined torque. Then, the energy control unit 8 is connected to the upper end 1A side of the vertically falling rock prevention wire 1 and this connection is made with a connection terminal 12 mounted on the vertically falling rock prevention wire 1 as shown in FIG. The shock absorber 11 is connected to the rope connection bolt 14 consisting of all screw bolts and the nut 14A.

  And in the construction method, the slope is covered with a rockfall protective body made of rockfall prevention wire rods 1 and 2 made of ropes assembled in a grid with a wire mesh 3 covering the slope, and the upper end of the vertical rockfall prevention wire rod 1 and the sideways rockfall prevention. Both ends of the wire 2 are connected to an energy control unit 8 connected to fixed parts 5, 6 and 7 installed on the slope. Cross metal fittings 16 are arranged at the intersections of the rockfall prevention wires 1 and 2 assembled in a grid, and vertical and horizontal reinforcing rockfall prevention wires 9 and 10 are arranged in a lattice between the rockfall prevention wires 1 and 2 assembled in a lattice. To do. Then, a cross clip 17 is arranged at the intersection of the vertical and horizontal reinforcing rock fall prevention wires 9, 10 assembled in a lattice shape, and both ends of the rock fall prevention wire 1 and the rock fall prevention wire 1 at the lowest stage and the rock fall prevention wire 1. The rockfall prevention wire 2 at the top and the lowermost stage, and the both ends of the reinforced rockfall prevention wire 10 and the rockfall prevention wire 1 at the left and right ends are connected by a three-way clip 19.

  After connecting the vertical rockfall prevention wire 1 and the horizontal rockfall prevention wire 2 to the energy control unit 8 in this way, the vertical rockfall prevention wire 1 and the horizontal rockfall prevention wire 2 are obtained by reducing the tightening of the nut 14A of the connection bolt 14. It has a function to adjust the slack and tension of the.

  Connection between the energy control unit 8 and the fixing portions 5, 6, and 7 as anchors is performed as follows. As shown in FIG. 3, the energy control unit 8 is connected to the fixing portions 5, 6, and 7 through the connection jig 21 by the connection terminal 12 and the anchor connection U bolt 13 of the energy control unit 8.

  After connecting the vertical and horizontal wire ropes to the energy control unit 8, by adjusting the nut 21 of the anchor connection U-bolt 13, the function of adjusting the slack and tension of the vertical rock fall prevention wire 1 and the horizontal rock fall prevention wire 2 is adjusted. Have. A first flat plate piece 25 which is an elliptical “center hole piece” having a first through portion 41 for allowing the buffer wire member 15 to pass through in the center, three in the embodiment, and a long diameter from the center of the piece. In the embodiment, the second flat plate piece 26 which is an elliptical “eccentric hole piece” having a second penetrating portion for penetrating the buffer wire member 15 at a location eccentric in the long side direction which is the Y direction, The interval holding ring 38 for holding the interval between the four frames and the frames and the interval between the frames at both ends and the shock absorber 11 is composed of eight in the embodiment.

  The reason why both the first flat plate piece 25 that is the central hole piece and the second flat plate piece 26 that is the eccentric hole piece is elliptical is to align the direction of the second flat plate piece 26 that is the eccentric hole piece. This is a rational method and has the purpose of reducing the weight of the first flat plate piece 25 and the second flat plate piece 26.

  On the other hand, as shown in FIG. 10, the first flat plate piece 25, the second flat plate piece 26, and the intermediate through portion 37 that is a storage groove for the shock absorber 11 are formed into an elliptical shape, thereby forming an eccentric hole piece. By physically preventing the second flat plate piece 26 from being tilted when it is set in the groove of the shock absorber 11, the first flat plate piece 25 serving as the stop hole piece and the second flat plate piece serving as the eccentric hole piece are provided. By preventing the flat plate piece 26 from being tilted when it is set in the groove of the shock absorber 11, the errors in the through holes of the first flat plate piece 25 and the second flat plate piece 26 are made reasonably uniform. I can do it. The state where a group of control parts are inserted into the buffer wire member 15 is a state in which a step is generated at the apex of the central hole piece and the eccentric hole piece. In such a state, the buffer wire member 15 is in a straight state, but when the divided casings 32 and 33 of the upper and lower shock absorbers 11 are tightened with bolts and nuts 34, the center hole piece and the eccentric hole piece are in the state shown in FIG. As shown in FIG. 9, the buffer wire member 15 is also deformed into a wave shape.

  Therefore, when a load due to rock fall energy occurs on the vertical rock fall prevention wire 1 and the horizontal rock fall prevention wire 2, the shock absorber 11 connected to the vertical rock fall prevention wire 1 and the horizontal rock fall prevention wire 2 shows the buffer wire member 15. As shown in FIG. 9, it moves along the buffer wire member 15 while being deformed into a wave shape.

  At this time, a function of controlling and attenuating the rockfall energy is generated by converting the rockfall energy into energy that the shock absorber 11 moves while deforming the buffer wire member 15 into a wave shape.

  Thus, when falling rocks are generated and a tension of a predetermined level or more is generated in the falling rock prevention net 3, the vertical falling rock preventing wire 1 arranged in a lattice shape, and the lateral falling rock preventing wire 2, a shock absorber 11 provided at the end portion. , The casing 24 of the shock absorber 11 moves to the opposite side of the upper fixing portion 5 with respect to the shock absorbing wire portion 15. Further, it moves in the opposite direction to the one-side fixture 6 and in the opposite direction to the other-side fixture 7. When the casing 24 is moved, the impact energy of falling rocks can be absorbed by the frictional sliding between the buffer wire portion 15 and the plurality of second flat plate pieces 26, etc., and the vertical falling rock prevention wire 1 and the horizontal falling rock prevention wire 2 can be absorbed. Can be prevented, the loads acting on the anchors 5, 6, and 7 serving as anchors can be controlled to a certain limit, and breakage or the like can be avoided.

  Also, the rock mass can be stopped on the slope 1 while absorbing the falling energy of the rock mass by the above-described units such as the shock absorber 11 using the frictional sliding, the connection terminal 12 and the anchor connection U bolt 13. The mass can be guided to a safe place at the end of the structure to prevent the rock from jumping onto the road or colliding with a facility.

  As described above, in the above-described embodiment, the energy control unit 8 includes the connection terminal 12, the anchor connection U bolt 13, the rope connection bolt 14, the buffer wire portion 15 as a control rope, and the shock absorber 11 as a buffer fitting. In this way, it is possible to connect to the upper, one side and other side fixing parts 5, 6 and 7 which are lock anchors previously installed on the slope alone via the anchor connection U-bolt 13, and the energy control unit. 8 can be manufactured in advance at the factory and quality control can be performed. As a result, on-site assembly work and work for managing humidity can be reduced.

  Further, the fixed portions 5, 6, which are provided with a rock fall prevention wire rod such as a vertical rock fall prevention wire rod 1, a lateral rock fall prevention wire rod 2, a net 3 etc. on the inclined surface to cover the inclined surface, and the rock fall prevention wire rod is provided on the ground. 7 and a shock absorber 11 that allows sliding of the buffer wire portion 15 of the rock fall prevention wire when a predetermined tension is applied to the rock fall prevention wire. 3 is controlled by the energy control unit 8 to prevent the occurrence of damage, breakage, damage, etc. of the rock fall protective material placed on the slope by controlling the rock fall energy. In the process of falling while sandwiched between PC nets, it has a function to prevent falling rock disasters by capturing it on the slope while gradual decay of rockfall energy, or landing safely on a flat side of the road .

  The merit of the energy control function unit 8 is that it is only necessary to replace the unit 8 in which the movement has occurred in the shock absorber 11 in order to recover the current state after the falling rocks are generated in the PC net. The direction falling rock prevention wire 1, the side falling rock prevention wire 2, the longitudinal reinforcement falling rock prevention wire 9, and the side reinforcement falling rock prevention wire 10 do not need to be replaced because they are not damaged or broken by the function of the energy control unit 8. Moreover, since the rock fall energy can be controlled between 50 KN and 60 KN, for example, the load acting on the fixing portions 5, 6, and 7 serving as anchors is the same level, so that the anchors are not pulled out or damaged. Furthermore, quality control is performed at the factory because it is a factory-produced product, and no on-site management is required.

  The shock absorbing device 11 is fixed to the vertical rock fall prevention wire 1 and the horizontal rock fall prevention wire 2 side while the buffer wire portion 15 penetrates and is arranged in parallel along the longitudinal direction of the buffer wire portion 15. The flat plate piece 25 and the second flat plate piece 26 are repeatedly arranged, and the second flat plate piece 25 in the first flat plate piece 25 penetrates the buffer wire portion 15 through the second penetrating portion 41. By providing a displacement with respect to the second penetration part 42 through which the buffer wire part 15 in the flat plate piece 26 penetrates, a wave shape is formed between the buffer wire part 15 and the second penetration part 42. It is possible to reliably generate friction.

  The shock absorber 11 includes a casing 24 provided with a penetrating portion 27 into which the buffer wire portion 15 is inserted, and a first portion that is juxtaposed to the intermediate penetrating portion 37 along the center line X of the casing 24. The flat plate piece 25 and the second flat plate piece 26 are repeatedly arranged, and the second flat plate piece is opposed to the first penetrating portion 41 through which the buffer wire portion 15 in the first flat plate piece 25 penetrates. The buffer wire portion 15 and the second through portion that are wave-like in the state of being housed in the casing 24 by being displaced with respect to the second through portion 42 through which the buffer wire portion 15 in 26 passes. It is possible to generate friction with 42.

  Further, the casing 24 has a cylindrical shape, and the divided casings 32 and 33 divided by the divided surfaces 30 and 31 including the center line X are abutted and fixed integrally. Each of the flat plate pieces 26 has a front surface and a back surface perpendicular to the buffer wire portion 15 formed in a substantially elliptical shape, and has outer peripheral surfaces 25A and 26A of the first flat plate piece 25 and the second flat plate piece 26, respectively. Each is fitted into the inner peripheral surface 40 of the casing 24, the first penetrating portion 41 is provided at the center of the first flat plate piece 25, and the second penetrating portion 42 is the length of the second flat plate piece 26. The first flat plate piece 25 and the second flat plate piece 26 can be accurately stored in the casing 24 by being displaced in the side Y direction. As a result, the first through-portion 41 and the first flat plate piece 26 can be stored. The predetermined displacement length H can be reliably set for the second penetration portion 42 that is displaced from the penetration portion 41.

  Moreover, the second retaining plate 38 is interposed between the first flat plate piece 25 and the second flat plate piece 26 by interposing a spacing ring 38 having a third through portion 43 through which the buffer wire portion 15 passes. By interposing the third through portion 43 without penetrating the buffer wire portion 15 directly from the through portion 42 to the first through portion 41, the first oblique upward portion 15C, the first oblique downward portion 15D, etc. By relaxing the inclination angle, it is possible to prevent breakage of the buffer wire portion 15 at the corner, further breakage and the like.

  Further, the casing 24 has a cylindrical shape, and the divided casings 32 and 33 which are vertically divided together with the penetrating portion 37 by the dividing surfaces 30 and 31 including the center line X are abutted and fixed integrally to each other. The flat plate piece 25 and the second flat plate piece 26 are each formed in a substantially elliptical shape with the surface orthogonal to the buffer wire portion 15 and the back surface thereof, and the buffer wire portion 15 is formed into a first penetrating portion 41 and a second penetrating portion. After being repeatedly inserted into the portion 42, the buffer wire portion 15 is kept in a horizontal state, and the first flat plate piece 25 and the second flat plate piece 26 are penetrated through the divided casing 33 on the lower side of the division. 27, after the upper divided casing 32 is put on the lower divided casing 33 and integrated, the outer peripheral surfaces 25A and 26A of the first flat plate piece 25 and the second flat plate piece 26 are integrated. Are respectively fitted to the inner peripheral surface 40 of the casing 24, and the first through-portion 41 is connected to the first through-hole 41. A group of buffer wire portions 15 set in advance by disposing the second penetrating portion 42 in the long side direction (major-diameter direction Y) of the second flat plate piece 26 provided at the center of the flat plate piece 25 Is set in the split casing 33, and further covered with the split casing 32, and then the split casings 32 and 33 are fixed together so that the second penetrating portion 42 can be easily displaced to the first penetrating portion 41. Can be assembled.

  In addition, the rock fall energy control function can be controlled within the range of about 50 KN to 60 KN per 8 energy control units within the range of the fall rock fall experiment result performed in actual size according to the magnitude of rock fall energy. found. Further, it was found from the rock fall experiment conducted on the actual size as described above that the energy control unit 8 can attenuate about 80% of rock fall energy.

  Furthermore, the energy control which consists of the fixing part 5,6,7 which fixes the rock fall prevention wires 1 and 2 which are vertical and horizontal ropes to a slope, the U bolt 13, the connection terminal 12, the buffer wire member 15 which is a control rope, and the buffer metal fitting 11 The buffer metal fitting 11 has a function of deforming and gripping the buffer wire member 15 as a control rope into a continuous wave shape inside the buffer metal fitting 11, and the buffer metal fitting 11 has a deformation gripping force in one direction. When the above force is applied, when the buffer wire member 15 as the control rope is deformed into a continuous wave shape, the movement energy is continuously changed into a wave shape when moving in the direction of the generation of the action force. An energy-controlled rockfall protection netting method equipped with an energy control unit that converts the energy required for deformation and generates an action energy damping action to prevent falling rocks when tension exceeds a predetermined level. A continuous corrugated sliding of cushioning wire portion 15 by allowing the energy control unit, it is possible to prevent the falling rocks.

  Further, the slope 3 is covered with a mesh 3 that is a wire mesh, and rock fall prevention wires 1 and 2 that are ropes assembled in a lattice shape are arranged on the slope, and the upper end 1A and the horizontal rope that are vertical rope fall prevention wires 1 are arranged. Energy control composed of U-bolts 13, connecting terminals 12, buffer wire members 15 as control ropes, and shock-absorbing metal fittings 11 at both ends of the rock fall prevention wire 2 connected to fixed portions 5, 6 and 7 installed on the slope. Connected to the unit 8, and at the intersection of the rock fall prevention wires 1 and 2 that are vertical and horizontal ropes, a cross metal fitting 16 is arranged to hold the rock fall prevention wires 1 and 2 by deforming them into a continuous corrugated shape. When the above force is applied, when the cross metal fitting 16 moves in the direction of the action force while converting the rock fall prevention wires 1 and 2 that are vertical and horizontal ropes into energy necessary to transform into a continuous corrugated shape, Cross metal fittings 16 that damp action force By installing, when a predetermined tension or more is generated, the cross metal fitting 16 allows continuous wave-shaped sliding of the buffer wire portion 15 of the energy control unit 8 in the rock fall prevention wires 1 and 2 to prevent falling rocks. Prevention can be achieved.

  Moreover, in order to fix the rock fall prevention wires 1 and 2 which are the vertical and horizontal ropes to the slope, an energy control unit 8 is connected to the fixing portions 5, 6 and 7 installed on the slope, and the energy control unit 8, when rock fall prevention wires 1 and 2 are fixed, and when a certain force or more is applied to each rock fall prevention wires 1 and 2, the energy connected to the fixing portions 5, 6 and 7 installed on the slopes of the relevant places In the control unit 8, energy control in which a damping action of the acting force occurs when moving in the direction of the acting force while converting the buffer wire portion 15, which is a control rope, into energy necessary to transform it into a continuous wave shape. Equipped with the unit 8 can reliably prevent falling rocks.

  Other embodiments will be described below. In addition, the same code | symbol is attached | subjected to the same part as the said Example 1, and the detailed description is abbreviate | omitted.

  As shown in FIG. 18, the frame may be circular. The first flat plate piece 25 ′ provided with the first penetrating portion 41 ′ and the second flat plate piece 26 ′ provided with the second through portion 42 ′ having the displacement length H are referred to as Example 1. This is the same case.

  In the third embodiment shown in FIG. 19, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In Example 3, the front and back surfaces of the first flat plate piece 25 ″ and the second flat plate piece 26 ″ are formed in a rectangular shape, and the first penetrating portion 41 ″ is used as the first flat plate piece. A penetrating portion formed in the casing 24, which is provided between the front and back center portions of the piece 25 ″, and the second penetrating portion 42 ″ is displaced to one side in the long side direction from the central portion. The cross section of 27 intermediate penetration part is also formed in the rectangle so that the 1st flat plate piece 25 '' and the 2nd flat plate piece 26 '' may fit. The deviation length is H ′.

  Therefore, in a state where the first flat plate piece 25 ″ and the second flat plate piece 26 ″ are fitted to the intermediate through portion 37, the first through portion 41 ″ is on the center line X. The second through-hole 42 ″ is deviated from the center line X. As a result, the buffer wire portion is arranged in a casing 24 wave shape, and the same effect as that of the first embodiment can be achieved. .

In Example 4 shown in FIGS. 20 and 21, the mesh cover 3 that is a wire mesh that covers the slope and the slope cover portion that is the rock fall prevention body made of the rock fall prevention wires 1 and 2 made of ropes assembled in a lattice shape are arranged in two vertical directions. The upper slope covering portion 4A, which is an upper paragraph stone prevention body divided into steps, and divided into two upper and lower stages, and the lower slope covering portion 4B, which is a lower paragraph stone prevention body, are fixed at predetermined positions on the slope. The upper slope covering portion 4A and the lower slope covering portion 4B are laid on top of each other so that the upper slope covering portion 4A faces down, and the upper end portion 1A of the vertically falling rock prevention wire 1 of the upper slope covering portion 4A and Both ends of the sideways falling rock prevention wire 2 are connected to the energy control unit 8 connected to the fixing portions 5, 6 and 7 installed on the slope, respectively, and further, the vertical rockfall prevention wire of the upper slope covering portion 4A. 1B lower end 1B and upper slope cover The lowermost lateral rock fall prevention wire 2X, which is the lowermost lateral rope of A, is connected by a three-way clip 19, and the lateral rock fall prevention wire 2 of the upper slope covering portion 4A is joined to the fixing portions 6 and 7 installed on the slope. Connected to the energy control unit 8,
The lower slope covering portion 4B, which is a lowering protection body, is a vertical rope of the lower slope covering portion 4B, which is laid from a place overlapped with the upper slope covering portion 4A at a certain ratio to a predetermined portion of the slope. The upper end 1A ′ of the vertically falling rock prevention wire 1 ′ is a control rope extending from the energy control unit 8 connected to the upper end 1A of the rock falling prevention wire 1 of the upper slope covering portion 4A as shown by the alternate long and short dash line. It is connected to the wire portion 15 via a shock absorber 11 that is a shock absorber. Further, the lower end portion 1B of the vertically falling rock prevention wire 1 is connected to a fixed portion (not shown) installed on the slope, and both ends of the horizontally falling rock prevention wire 2 'of the lower slope covering portion 4B are installed on the slope. Connected to the energy control unit 8 ′ connected to the fixed portions 6 ′ and 7 ′, and at the intersection of the vertical and horizontal rock fall prevention wires 1, 2, 1 ′ and 2 ′ of the upper slope covering portion 4 </ b> A and the lower slope covering portion 4 </ b> B. Is arranged with cross metal fittings 16 and 16 'for deforming and holding the vertical and horizontal rock fall prevention wires 1, 2, 1' and 2 'into continuous corrugations, respectively, When the cross metal fittings 16 and 16 'move in the direction of the acting force while converting the preventing wires 1, 2, 1', and 2 'into energy necessary for deforming into a continuous wave shape, the acting force is attenuated. Equipped with generating energy control units 8, 8 '.

  In the figure, reference numeral 51 is a holding rope, 52 is an interval holding rope, 53 is a suspension rope (suspending rope) that forms a part of the rockfall prevention wire 1 on the energy control unit 8 side, and the energy control unit 8 and the rockfall It is interposed between the preventive wire 1 and the relay fitting 54.

  In the fourth embodiment as well, when a tension higher than a predetermined value is generated, the continuous corrugation of the buffer wire portion 15 of the energy control unit 8, 8 'in the rock fall prevention wire 1, 2, 1', 2 'is performed. Sliding can be allowed by the cross metal fittings 16 and 16 'to prevent falling rocks.

  In Example 5 shown in FIG. 22, there is a rockfall source above the slope, and it is installed when there is sufficient space on the side of the road. A plurality of columns 71 are arranged horizontally on the slope. A slope cover 4, which is a rock fall prevention body composed of a wire mesh 3 and a rock fall prevention wire 1, 2, which is a vertical and horizontal rope, is suspended from the column 71, and both ends of the rock fall prevention wire 2 are on the slope. A cross fitting 16 that is connected to an energy control unit 8 that is connected to a fixed portion 6 installed on the rock, and that is formed by deforming and holding the rockfall prevention wires 1 and 2 into a continuous corrugated shape at the intersection of the rockfall prevention wires 1 and 2. When the cross metal fitting 16 moves in the direction of the acting force while converting the rock fall prevention wires 1 and 2 into energy necessary to transform into a continuous corrugated shape when a force greater than the gripping force is applied. , Energy that produces a damping effect Ghee control unit 8'' is intended to equip between the top of the upper portion of the fixed portion 5 and the support 71.

  Therefore, in the fifth embodiment, falling rocks can be held by the lower slope covering portion 4 on the road side, and continuous wave-shaped sliding is allowed in the energy control unit 8 ″. Can do.

In Example 6 shown in FIG. 23, there is a rockfall source above the slope and it is installed when there is not enough space on the side of the road. A plurality of support columns 71 are arranged horizontally on the slope. A slope covering portion 4A, which is an upper rock fall prevention body composed of a wire mesh 3 and a rock fall prevention wire 1 and 2 being vertical and horizontal ropes, is suspended from the column 71 and laid to a predetermined location on the slope. The both ends of the rock fall prevention wire 2 that is a horizontal rope are connected to the energy control unit 8 connected to the fixed portion 6 installed on the slope, and the lower slope covering portion 4B, which is the upper part of the other rock fall protection body, is The upper slope covering portion 4A suspended from 71 is overlapped at a certain rate so as to be covered from above, laid to a predetermined position on the slope, and both ends of the rock fall prevention wire 2 'as a horizontal rope are Energy fixed on the slope The upper end 1A ′ of the rock fall prevention wire 1 ′ of the lower slope cover 4B connected to the control unit 8 ′ is connected to the buffer wire 15 which is a control rope connected to the support 71 through a shock absorber 11 which is a shock absorber. The lower end 1B ′ of the vertical rope is connected to a fixed part 72 installed on the slope,
Falling rock prevention wires 1, 2, 1 ', 2' are continuously connected to the intersections of falling rock prevention wires 1, 2, 1 ', 2' of the upper and lower slope covering portions 4A and 4B. If a cross metal fitting (not shown) that is deformed and gripped into a corrugated shape is arranged and a force greater than the gripping force is applied, the rockfall prevention wires 1, 2, 1 ', 2' are deformed into a continuous corrugated shape. When the cross fitting moves in the direction of the acting force, the energy control unit 8 ″ that generates a damping effect of the acting force is placed between the upper fixing portion 5 and the upper portion of the column 71 while converting the energy to the energy required for the operation. To be equipped.

  Therefore, in the fifth embodiment, falling rocks can be held by the lower slope covering portion 4B on the road side, and continuous wave-shaped sliding is allowed in the energy control unit 8 ″. Can do.

  As described above, the rock fall prevention device according to the present invention can be applied to various uses.

1 Longitudinal rock fall prevention wire (vertical rope)
1A Upper end 2 Sideways rock fall prevention wire (lateral rope)
3 Net (net)
4 Slope cover (falling rock prevention body)
4A Upper paragraph stone protector 4B Lower paragraph stone protector 5, 6, 7 Fixing part (fixture)
8 8 ′ 8 ″ Energy control unit
11 Shock absorber (buffer fitting)
12 Connection terminal
13 U bolt
15 Buffer wire section (control rope)
16 Cross bracket
19 Three-way clip
24 casing
25 First flat plate piece
26 Second flat plate piece
25A, 26A outer peripheral surface
30, 31 Dividing plane
32, 33 Split casing
38 Spacing ring
40 Inner surface
41 First penetration
42 Second penetration
43 Third penetration
71 Prop H Deflection length

Claims (11)

A plurality of rope fall prevention wires such as rope members and nets are provided on the sloped surface to cover the sloped surface, and the rock fall prevention wire is connected to a fixture provided on the ground. In the rockfall prevention device provided with a shock absorber that allows sliding of the buffer wire portion of the rockfall prevention wire when
The buffer device includes the first and second pieces that are fixed to the fixture side and are repeatedly arranged while the buffer wire portion penetrates and is arranged in parallel along the longitudinal direction of the buffer wire portion. The first penetrating portion through which the buffer wire portion in the first piece penetrates is displaced with respect to the second penetrating portion through which the buffer wire portion in the second piece penetrates. A rock fall prevention device. A plurality of rope fall prevention wires such as rope members and nets are provided on the sloped surface to cover the sloped surface, and the rock fall prevention wire is connected to a fixture provided on the ground. A shock absorber that allows sliding of the shock absorbing wire portion of the rock fall prevention wire when
The shock absorber includes a casing having a proximal end connected to the fixture side and provided with an insertion hole into which the buffer wire portion is inserted from the distal end side, and the insertion from the distal end side of the casing along the proximal end side. A first flat plate piece and a second flat plate piece arranged side by side in a fitted state in a hole are repeatedly arranged, and the first through portion through which the buffer wire portion in the first flat plate piece penetrates. The rock fall prevention device is characterized by being displaced with respect to the second penetrating portion through which the buffer wire portion of the second flat plate piece penetrates.   The casing has a cylindrical shape and is fixed integrally by abutting a divided casing divided by a dividing surface including a center line thereof, and the first flat plate piece and the second flat plate piece are respectively the buffer wire members. The front surface and the back surface orthogonal to the part are formed in a substantially elliptical shape or a substantially rectangular shape, and the outer peripheral surfaces of the first flat plate piece and the second flat plate piece are respectively fitted on the inner peripheral surface of the casing, The first penetrating portion is provided at the center of the first flat plate piece, and the second penetrating portion is displaced in the long side direction of the second flat plate piece. Rock fall prevention device.   4. The space retaining ring having a third through portion through which the buffer wire portion penetrates is interposed between the first flat plate piece and the second flat plate piece. 5. The rock fall prevention device according to claim 1. A plurality of rope fall prevention wires such as rope members and nets are provided on the sloped surface to cover the sloped surface, and the rock fall prevention wire is connected to a fixture provided on the ground. A shock absorber that allows sliding of the shock absorbing wire portion of the rock fall prevention wire when
The shock absorber includes a casing having a proximal end connected to the fixture side and provided with an insertion hole into which the buffer wire portion is inserted from the distal end side, and the insertion from the distal end side of the casing along the proximal end side. A first flat plate piece and a second flat plate piece arranged side by side in a fitted state in a hole are repeatedly arranged, and the first through portion through which the buffer wire portion in the first flat plate piece penetrates. A rock fall prevention device that is displaced with respect to the second penetrating portion through which the buffer wire portion of the second flat plate piece penetrates,
The casing has a cylindrical shape and is fixed integrally by abutting a divided casing divided vertically with the insertion hole by a dividing surface including a center line thereof, and the first flat plate piece and the second flat plate piece. Each of the front surface and the back surface thereof orthogonal to the buffer wire portion is formed into a substantially elliptical shape or a substantially rectangular shape, and the buffer wire portion is repeatedly inserted into the first through portion and the second through portion, and then the buffer portion is inserted. After the wire portion is kept in a horizontal state, the first flat plate piece and the second flat plate piece are accommodated in the insertion hole of the divided lower divided casing, and then the upper side of the lower divided casing. And the outer peripheral surfaces of the first flat plate piece and the second flat plate piece are fitted into the inner peripheral surface of the casing, respectively, and the first through portion is connected to the first through portion. Provided at the center of one piece, the second Method of manufacturing a rock fall prevention device, characterized in that a through portion is offset in the longitudinal direction of the second piece.   An energy control unit consisting of U-bolts, connection terminals, control ropes, and buffer fittings is connected to a fixture that fixes the vertical and horizontal ropes on the slope, and the buffer fittings deform the control rope into a continuous wave shape inside the buffer fittings. When moving in the direction in which the acting force is generated while the control rope is deformed into a continuous wave shape when a force greater than the deformation gripping force in one direction is applied to the buffer metal fitting An energy-controlled rockfall protection net construction method equipped with an energy control unit that converts the action energy into the energy required to continuously transform the control rope into a wave shape, causing the action energy to decay.   Cover the slope with a wire mesh, place a rope assembled in a lattice shape on it, connect the upper end of the vertical rope and both ends of the horizontal rope to the energy control unit connected to the fixture installed on the slope, In addition, a cross metal fitting that deforms and grips the vertical and horizontal ropes into a continuous wave shape is arranged at the intersection of the vertical and horizontal ropes, and when a force greater than the gripping force is applied, the vertical and horizontal ropes are deformed into a continuous wave shape. An energy-controlled rockfall protection net construction method that is equipped with a cross metal fitting that generates a damping action when the cross metal fitting moves in the direction of the acting force while converting the energy into the energy required. A rockfall guard made up of a wire mesh covering the slope and a rope assembled in a lattice shape is laid on the slope in two steps, and the rockfall guard divided into two steps is fixed at a predetermined location on the slope. The upper and lower rockfall guards are laid on top of each other so that the upper paragraph stone guard is on the bottom, and the upper end of the vertical rope and the both ends of the horizontal rope of the upper paragraph stone guard are placed on the slope. Connected to the energy control unit connected to the fixture installed in the above, further connecting the lower end of the vertical rope of the upper paragraph stone protector and the lowermost lateral rope of the upper paragraph stone protector with a three-way clip, The horizontal rope of the upper paragraph stone protector is connected to the energy control unit connected to the fixture installed on the slope,
The lower stage of the defensive protector is laid from the place where it is overlapped with the upper paragraph stone protector at a certain rate to the predetermined part of the slope, and the upper end of the vertical rope of the lower paragraph stone protector is the upper paragraph stone protector The upper end of the vertical rope is connected to a control rope extended from the connected energy control unit via a buffer fitting, and the lower end of the vertical rope is connected to a fixture installed on the slope. The horizontal rope of the lower paragraph stone protector is connected to the energy control unit connected to the fixtures installed on the slope, and the vertical and horizontal ropes are transformed into a continuous wave shape at the intersection of the vertical and horizontal ropes of the upper and lower falling rock guards. When the cross fitting is moved and the cross fitting is moved in the direction of the applied force while converting the vertical and horizontal ropes into the energy required to deform into a continuous wave shape An energy-controlled rockfall protection net construction method that is equipped with a cross fitting that generates a damping action.   Energy that connects multiple pillars horizontally on a slope, suspends a rockfall guard consisting of a wire mesh and vertical and horizontal ropes from the pillar, and connects both ends of the horizontal rope to a fixture installed on the slope. Connected to the control unit, and at the intersection of the vertical and horizontal ropes, a cross metal fitting is arranged that deforms and grips the vertical and horizontal ropes into a continuous corrugated shape. An energy-controlled rockfall protection net equipped with a cross fitting that generates a damping action when the cross fitting moves in the direction of the acting force while converting it into the energy required to transform it into a corrugated shape. Construction method. A plurality of support pillars are set up side by side on the slope, and a rockfall guard composed of a wire mesh and vertical and horizontal ropes is suspended from the support pillar and laid to a predetermined location on the slope. Connected to the energy control unit connected to the fixture installed above, and a rockfall guard that is different from the rockfall guard body above the rockfall guard on the upper stage suspended from the column at a certain rate. Lay up to a predetermined position on the slope, and connect both ends of the horizontal rope to the energy control unit connected to the fixture installed on the slope, and the vertical rope of the lower paragraph stone protector The upper end is connected to the control rope connected to the support via a shock absorber, and the end of the vertical rope is connected to a fixture installed on the slope.
At the intersection of the vertical and horizontal ropes of the upper and lower rockfall protection bodies, a cross fitting is arranged that grips the vertical and horizontal ropes by transforming them into a continuous corrugation, and when a force greater than the gripping force is applied, the vertical and horizontal ropes are continuous. An energy-controlled rockfall protection net equipped with a cross fitting that generates a damping action when the cross fitting moves in the direction of the acting force while converting it into the energy required to transform it into a corrugated shape. Construction method.   In the energy control type rockfall protection net construction method according to any one of claims 6 to 9, in order to fix the vertical and horizontal ropes to the slope, the energy control unit is attached to a fixture installed on the slope. When the vertical and horizontal ropes are fixed to the energy control unit and a force exceeding a predetermined level is applied to each vertical and horizontal rope, the control ropes are connected to the fixtures installed on the slopes of the relevant locations. Energy-controlled rockfall protection, which is equipped with an energy control unit that generates a damping action when moving in the direction of the action force, while converting the energy into the energy required to transform it into a continuous wave shape Net work method.

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