JPH0742117A - Rock fall protection net construction method and pocket forming stanchion for rock fall protection net - Google Patents

Abstract

PURPOSE:To improve the execution property, rock fall protection performance, and reliability. CONSTITUTION:Many vertical/horizontal reinforcing ropes 2, right/left vertical ropes 5, an upper end horizontal rope 6a, and multiple lower half horizontal ropes 6b are assembled to reinforce a wire net 1, and pocket forming stanchions 7 are timbered by suspension ropes 8a, 8b and erected on both side slopes (b) of a valley-like section (a) respectively. Upper end sections of the right/left vertical ropes 5 are connected to the upper sections of the stanchions 7, both side sections of the upper end horizontal rope 6a anchored 9a on both side slopes (b) are guided and supported on the stanchions 7, and the upper section of the wire net l is used as a curtain section to form a rock fall reception pocket. Both end sections of the lower half horizontal ropes 6b are anchored 9b respectively on both side slopes (b), the lower half section of the wire net 1 is installed on the valley-like section (a) to construct a rock fall protection net 10, and the rock fall protection nets 10 are constructed in multiple stages at a vertical interval on the valley-like section (a).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a rockfall protection net which is constructed in a swath or the like close to a road or the like and where there is a risk of rockfall, and a pillar for forming a pocket thereof.

[0002]

2. Description of the Related Art Conventional rockfall protection nets are roughly classified into a cover type and a pocket type, and a cover type rockfall protection net is constructed by incorporating a large number of vertical ropes (wire ropes) into a wide-area wire mesh at a horizontal interval of about 3 m. In addition, multiple horizontal ropes (wire ropes) are installed at long vertical intervals, the upper end of each vertical rope is anchored to the upper part of the slope where there is a risk of falling rocks, etc., and the wire mesh hangs down on the slope. It is constructed by anchoring both ends of each horizontal rope on both sides of the rope with appropriate means, and its wire mesh is easy to fit on the slope due to its flexibility and toughness, covering the entire slope and elastically receiving the rockfall to receive the rockfall energy. It is a protective facility for falling rocks, etc. that effectively absorbs it and prevents it from turning into rocks and flying stones. In addition, a pocket-type rockfall protection net has a large number of pocket-forming struts installed on the upper part of the slope with a horizontal interval, and the upper ends of the vertical ropes incorporated in the wire mesh are connected to the upper part of the stanchion, respectively. The upper part of the rope is arranged like a curtain to form a rockfall receiving pocket, and it is constructed by anchoring both ends of a plurality of horizontal ropes that are installed in the wire net with a vertical interval on both sides of the slope. It has become a protection facility for falling rocks, etc., and has the feature that it can be constructed on a small scale by shortening the vertical length compared to the cover type.

[0003]

The conventional pocket-type rockfall protection net has a pocket function for receiving rockfall above as compared with the cover type as described above, and it can be constructed on a relatively small scale to save construction cost. However, if rockfall is concentrated and is built in a swath that creates a relatively large amount of rockfall energy, it will be difficult to build a pocket formation pillar in the swath, and the rockfall will Since the pillars are easily damaged by collision, and the rock fall energy is absorbed mainly by the wire mesh only, there is a limit to the ability to absorb the rock fall energy, and there is a problem that it is necessary to form the wire mesh long.

The present invention was developed in order to solve the above-mentioned problems. The object of the present invention is to reinforce wire mesh with vertical and horizontal reinforcing ropes, etc. A pillar is built, and the right and left vertical ropes of the wire mesh and the horizontal rope at the upper end are supported on the upper part of the pillar, and the rockfall protection net construction method and rockfall protection net that improve the workability and the rockfall receiving protection performance, reliability and cost reduction are provided. Providing a post for forming a pocket.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a wire net is provided with a large number of vertical and horizontal reinforcing ropes, a left and right vertical rope, an upper end horizontal rope, and a plurality of lower half horizontal ropes for reinforcement. The pillars for forming the pockets are supported by hanging ropes, etc., and the upper ends of the left and right vertical ropes are connected to the upper parts of the pillars. The upper part of the wire net is used as a curtain to support the guide to form a rockfall receiving pocket, and both ends of each lower half horizontal rope are anchored to the slopes on both sides, and the lower half of the wire net is laid on a swath, etc. By constructing a protective net, it reinforces the wire mesh and
Easily and accurately construct pocket forming columns, wire nets, etc. to improve workability and rockfall receiving protection performance, reliability,
The facility is small in size to enable cost savings.

Further, the rockfall protection nets described above are constructed in a plurality of stages with a vertical interval in a swath or the like so that each rockfall protection net can be made even smaller to facilitate the construction, and the rockfall protection nets can be comprehensively received. The protection performance and reliability are further enhanced.
Further, in the above-mentioned pocket forming strut, the lower end of the strut is hingedly connected to an anchor so that it can be tilted in one direction, and a plurality of rope connecting brackets are arranged around the upper part of the strut, and the upper end of the strut is A guide metal fitting that guides and supports the upper-end horizontal rope at a right angle to the tilting direction is arranged on the upper part of the wire net that forms a rockfall receiving pocket by tilting the column and supporting the guides on both sides of the upper-end horizontal rope. It cushions the impact on the curtain and reduces the eccentric load on the columns, further improving rockfall support protection and reliability.

[0007]

[Function] The wire mesh is reinforced by incorporating vertical and horizontal reinforcing ropes, left and right vertical ropes, upper end horizontal ropes and a plurality of lower half horizontal ropes, and the pillars for forming the pockets are supported by hanging ropes on both slopes of the swath and the like. It can be easily and accurately built, and by supporting the left and right vertical ropes at the upper part of the pillar and guiding both sides of the upper end horizontal rope at the upper end, the curtain part on the upper part of the wire mesh where the rockfall receiving pocket is formed is It has been constructed with high accuracy, has toughness and appropriate elasticity, and has excellent rockfall energy absorption performance, that is, rockfall reception performance and reliability.In addition, it is laid in swaths etc. with multiple lower half horizontal ropes. The lower half of the wire net has excellent rockfall receiving performance and reliability, and the rockfall receiving protection performance is effectively enhanced.
Therefore, the length of the wire mesh can be shortened and the construction cost can be reduced because the construction can be performed on a small scale.

Further, by constructing the rockfall protection nets in a plurality of stages in a stream-like portion or the like, each rockfall protection net can be made even smaller in size and easily constructed, and the rockfall receiving protection performance and reliability can be comprehensively improved. Further enhanced. Further, in the above-mentioned pocket forming pillar, the lower end of this pillar is hingedly connected to the anchor plate so that the pillar can be tilted in the inclination direction of the swath, etc., and the upper ends of the left and right vertical ropes are supported by the upper part of the pillar. By supporting slidably guide both sides of the upper end horizontal rope at the upper end, shocks applied to the left and right vertical ropes and the upper end horizontal rope are buffered and the eccentric load of the column is reduced to form a rockfall receiving pocket. The curtain on the top of the wire net further enhances the rockfall protection performance and reliability.

[0009]

1 and 2 show a first embodiment of a rockfall protection net construction method of the present invention, a second embodiment thereof in FIG. 3, an embodiment of a pocket forming strut in FIG. 4, and an anchor in FIG. An example is shown. In the figure, “a” is, for example, a swath that is close to the road R or the like and is likely to have rockfalls, “b” is a slope on both sides of the swath, “1” is a wire mesh,
Is a vertical / horizontal reinforcing rope vertically and horizontally incorporated in the wire netting 1, 4 is a clamp arranged at a connecting portion or an intersection of each rope, 5 is a left and right vertical rope installed on both sides of the wire netting 1, and 6a is an upper end portion of the wire netting 1. The upper end horizontal rope incorporated in the, 6b is a plurality of lower half horizontal ropes installed in the lower half of the wire netting 1 at a vertical interval, and 7 is a pillar that forms a rockfall receiving pocket with the upper part of the wire netting 1 as a curtain part , 8a and 8b are suspension ropes and side ropes that support the support column 7, 9a and 9b are anchors (anchor fittings), and 10 is a rockfall protection net constructed in the a-shaped portion a, etc., as shown in FIGS. The first embodiment is a wire mesh 1.
In addition to the many vertical and horizontal reinforcing ropes 2, the left and right vertical ropes 5, the upper end horizontal ropes 6a, and the plurality of lower half horizontal ropes 6b are incorporated and reinforced, and the pillars 7 for forming pockets are formed on the slopes b on both sides of the swath portion etc. Are supported by suspending ropes 8a and 8b, and the upper ends of the left and right vertical ropes 5 are connected to the upper portions of the columns 7, and both sides of the upper horizontal ropes 6a anchored on both side slopes b are attached to the columns 7. The upper part of the wire netting 1 is supported as a curtain by using the upper part of the wire netting 1 as a curtain to form a rockfall receiving pocket. It is a rockfall protection net construction method in which the rockfall protection net 10 is constructed by laying on a portion a and the like.

The second embodiment shown in FIG. 3 is characterized in that in the rockfall protection net construction method described above, the rockfall protection nets 10 are arranged in a plurality of steps at a vertical interval on a ridge portion or the like a. It is a falling rock protection net construction method.

Further, the pocket forming column 7 shown in FIG.
7a is a plurality of anchor bolts 7b and is a slope b.
An anchor fixedly attached to the anchor plate, 7c is a post connected to the anchor plate 7a by a pin bolt so that it can be tilted in one direction, and a hinge connection 7d is provided. 7e is a rope connection bracket projecting forward and backward and left and right above the support post 7c. 7c is a guide metal fitting made of a U-shaped shank protruding with a pin bolt 7g. In the embodiment of FIG. 4, the lower end portion of the pillar 7c of the pocket forming pillar 7 used in the rockfall protection net construction method is used. Is hinged on the anchor 7a so that it can be tilted in one direction, and a plurality of rope connecting brackets 7e are arranged around the upper portion of the column 7c.
A guide metal fitting 7f for guiding and supporting the upper end horizontal rope 6a substantially at right angles to the tilting direction is provided at the upper end of the rock fall protection net 10 for forming a pocket.

More specifically, as shown in FIGS. 1 and 2, the wire net 1 is formed to have a width corresponding to the groove portion a by means such as connecting in the width direction, and its length is shortened as compared with the conventional example. It In addition, the wire mesh 1 includes vertical and horizontal reinforcing ropes (wire ropes).
2 on the entire surface at vertical and horizontal intervals of about 1 m, right and left vertical ropes (wire ropes) 5 on both sides, the upper edge is bent and upper end horizontal ropes (wire ropes) 6a are installed, and multiple lower half horizontal ropes The (wire rope) 6b is incorporated in the lower half of the rope at appropriate vertical intervals, and the connecting portions and intersecting portions of these ropes are connected and fixed by appropriate clamps 4 to reinforce and have excellent toughness. The falling rock protection performance is improved.

As shown in FIG. 4, the pocket forming column 7 includes an anchor 7a, an anchor bolt 7b, and a column 7.
c, rope connecting bracket 7e, and guide fitting 7f
The anchor 7a is strongly fixed to the solid ground on the slopes b on both sides with a plurality of anchor bolts 7b (filling special cement to increase the anchor strength), and the anchor 7a
The lower end of the column 7c is hinged 7d on the upper side and built so that it can be tilted in one direction (inclination direction F of the ridged portion a), and the suspension rope (wire rope) 8a anchored above the slope b is attached to the upper portion of the column 7c. The rope connecting bracket 7e is connected to the rope connecting bracket 7e by an appropriate means, and the pair of left and right side ropes (wire ropes) 8b anchored 9b are similarly connected to and supported by the rope connecting bracket 7e above the pillar 7c.
The upper ends of the left and right vertical ropes 5 of the wire mesh 1 are similarly connected to the rope connecting bracket 7e on the upper side of the c
The guide metal fitting 7f at the upper end is inserted through both sides of the upper end lateral rope 5 to slidably guide and support it (a direction substantially perpendicular to the inclination direction F), and the length of the column 7c is equal to the swath portion a and both sides. It is set according to the height difference between the slope b and
The upper part of the wire netting 1 is held at an appropriate height and arranged in a curtain shape to form a rockfall receiving pocket.

The anchor 9a is, for example, as shown in FIG. 5, anchor main body 9c strongly fixed on the slope b by a plurality of anchor bolts 9d (filled with special cement), and fixed on the anchor main body 9c. A rope terminal formed of a connecting plate 9e with a bolt hole 9f, etc., an anchor main body 9c being fixed on an inclined surface b with an anchor bolt 9d, and the upper end portion of the hanging rope 8a being provided with a turn backpack or the like and being clip-fastened. The structure is such that the parts are bolted to the connecting plate 9e, and various mechanisms are applied as necessary.
Also, various mechanisms are similarly applied to the anchor 9b.

In the rockfall protection net 10 described above, as shown in FIGS. 1 and 2, the longitudinal and lateral reinforcing ropes 2, the left and right longitudinal ropes 5, the upper end lateral ropes 6a and the plurality of lower half lateral ropes 6 are attached to the wire mesh 1.
b is built in and reinforced, and the pillars 7 for forming a pocket are built in the slopes b on both sides of the swath a so that they can be tilted (inclination direction F).
The suspension ropes 8a and the side ropes 8b anchored 9a, 9b above and on both sides of the slope b are connected to and supported by a rope connecting bracket 7e on the upper part of the column 7c by an appropriate means, and the upper ends of the left and right vertical ropes 5 are respectively supported. In the same way as connecting to the rope connecting bracket 7e on the upper part of the pillar 7, both sides of the upper end horizontal rope 6a can be slid through the guide metal fittings 7f on each pillar 7 (almost at right angles to the inclination direction F). The guide 9 is supported and the tip of the guide is anchored to the slope b by an anchor 9a.
Then, the upper part of the wire netting 1 is arranged at an appropriate height on the swath portion a to form a rockfall receiving pocket as a curtain portion, and further, both ends of each lower half horizontal rope 6b are anchored to both side slopes b.
Then, the lower half of the wire netting 1 is laid on the swath portion a, and a rockfall protection net 10 is constructed in the swath portion a.

As described above, the wire netting 1 of the present invention is remarkably reinforced by the vertical and horizontal reinforcing ropes 2, the left and right vertical ropes 5, the upper end horizontal ropes 6a and the lower half horizontal ropes 6b, and the pillars 7 for forming the pocket are swollen. It is built easily and firmly and accurately on the solid ground on both slopes b of a, etc., and is supported by hanging ropes 8a and side ropes 8b. Both ends of the upper end horizontal rope 6a are slidably guided and supported by the upper end of the wire mesh 1
The upper part is easily and precisely constructed as a curtain part forming a rockfall receiving pocket, and the impacts on the left and right vertical ropes 5 and the upper end horizontal ropes 6a are effectively buffered by the tilting of the column 7 and the slidable guide support. The eccentric load acting on both struts 7 as a torsional deformation force is remarkably reduced, and the curtain part of the rockfall receiving pocket formed on the upper part of the wire netting 1 has excellent toughness and moderate elasticity, and falls. A relatively large amount of falling rock energy of falling rocks is effectively absorbed to obtain excellent falling rock receiving performance and reliability, and a wire net 1 laid on a swath portion a by a plurality of lower half horizontal ropes 6b. Rockfall is effectively received by the lower half part of the rockfall, and the impact of rockfall support and reliability are significantly improved, with almost no collision of rockfall pillars and improved durability. There. Therefore, the length of the wire mesh 1 can be shortened to about half, and the wire mesh 1 can be constructed on a remarkably small scale, resulting in a significant reduction in construction cost.

Further, as in the second embodiment shown in FIG. 3, the rockfall protection nets 10 are arranged in a plurality of stages corresponding to the length, the inclination, and the bending of the swaths etc. The rockfall protection net 10 can be constructed on a smaller scale, is easily constructed, saves cost, and overall has improved rockfall protection performance and reliability.

Further, the column 7 for forming a pocket is easily and strongly built on the slopes b on both sides with high precision as described above, and the impact load of the wire net 1 caused by falling rocks causes the column to tilt (tilt) due to the hinge connection 7d. Direction F) and the slidable guide support between the upper end of the column and both sides of the upper end lateral rope 6a effectively reduce the eccentric load applied to the column, and deformation of the column such as bending and twisting is significantly reduced. The pocket forming performance, that is, the rockfall receiving protection performance and the reliability are further effectively improved by effectively preventing and stabilizing the axial force of the column.

Incidentally, the concrete structure of the pillar for forming a pocket, the anchor, etc. is not necessarily limited to the illustrated example, and various designs are possible.

[0020]

According to the present invention, the wire net is incorporated and reinforced by vertical and horizontal reinforcing ropes, left and right vertical ropes, upper end horizontal ropes and a plurality of lower half horizontal ropes, and the pillars for forming a pocket are formed on slopes on both sides such as a swath. Formed on the upper part of the wire mesh by supporting it with a hanging rope etc. and easily and precisely built, and supporting the left and right vertical ropes on the upper part of the pillar and slidably guiding both sides of the upper end horizontal rope on the upper end part. The curtain part of the rockfall receiving pocket that has excellent toughness and appropriate elasticity is added to enhance the rockfall receiving performance and reliability, and the wire mesh laid on the swath part with multiple lower half horizontal ropes. The lower half effectively receives rockfalls, and there is almost no collision of propelled rockfalls, and durability is improved, and rockfall protection performance and reliability are significantly improved. Therefore, the length of the wire mesh can be shortened, and the wire mesh can be constructed on a small scale, and the construction cost can be significantly reduced.

Further, by constructing the rockfall protection nets in a plurality of stages in a streamlike portion, the rockfall protection nets can be easily installed in a smaller scale, and the rockfall protection performance and reliability can be comprehensively improved. Is further enhanced. Further, in the above-mentioned pocket forming strut, the lower end of the strut is hingedly connected to the anchor plate so that it can be tilted in an inclined direction such as a swab, and the upper end of this strut slides both sides of the upper end horizontal rope. By supporting the guides as much as possible, the impact applied to the curtain is cushioned and the eccentric load of the columns is reduced, further enhancing the rockfall receiving protection performance and reliability.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a side view in the direction of arrow XX in FIG.

FIG. 3 is a side view showing a second embodiment.

FIG. 4 is a side view (A) and a front view (B) showing an embodiment of a pocket forming column.

FIG. 5 is a side view (A) and a plan view (B) showing an embodiment of an anchor.

[Explanation of symbols]

 1 Wire Mesh 2 Vertical and Horizontal Reinforcement Rope 5 Left and Right Vertical Rope 6a Upper End Horizontal Rope 6b Lower Half Horizontal Rope 7,7c Strut 7a Anchor (for Strut) 7d Hinge Connection 7e Connection Bracket 7f Guide Bracket 8a Suspended Rope 8b Side Rope 9a, 9b Anchor 10 Rockfall protection net a Sewage part b Both sides slope

Claims (3)

[Claims] 1. A plurality of vertical and horizontal reinforcing ropes, left and right vertical ropes, upper end horizontal ropes and a plurality of lower half horizontal ropes are incorporated and reinforced in a wire net, and columns for forming pockets are formed on slopes on both sides such as a swath. Built with support by hanging ropes,
The upper ends of the left and right vertical ropes are connected to the upper parts of the columns, and the upper ends of the horizontal ropes anchored to the slopes on both sides are guided and supported on the columns to form the upper part of the wire mesh as a curtain part to form a rockfall receiving pocket. A rockfall protection net construction method characterized in that both ends of each lower half horizontal rope are anchored to both side slopes, respectively, and the lower half of the wire net is laid on a swath to construct a rockfall protection net. 2. The rockfall protection net construction method according to claim 1, wherein said rockfall protection net is constructed in a plurality of stages with vertical intervals in a sewage portion or the like. 3. A pocket forming strut used in the falling rock protection net construction method according to claim 1 or 2, wherein the lower end of the strut is hinged to an anchor so that it can be tilted in one direction. A plurality of brackets for connecting the ropes are arranged around the upper part of the column, and a guide metal fitting for guiding and supporting the upper end horizontal rope at a right angle to the tilt direction is arranged at the upper end of the column. A prop for forming a pocket for rockfall protection nets.