CN218990210U - Passive flexible protective net - Google Patents

Abstract

The utility model discloses a passive flexible protective net, which comprises an annular net, a grid, a steel column system and a fixing system, wherein the annular net comprises a vertical annular net and an unfolding annular net connected with two sides of the vertical annular net, the fixing system is arranged on two sides of the steel column system and penetrates through the steel column system, the steel column system is arranged around the unfolding annular net and the inner side of the vertical annular net, the grid is arranged between the annular net and the steel column system, the steel column system comprises a segmented column arranged at the central axis position of the vertical annular net, middle columns arranged on two sides of the segmented column and end columns arranged on the outer side of the middle columns, the end columns, the middle columns and the segmented column are all fixed on a base, and anchor rod holes are formed in the base and are fixed on the ground through bolt anchor rods. The passive flexible protective net adopting the structure has the advantages of simple structure, strong protective performance and convenience for field assembly.

Description

Passive flexible protective net

Technical Field

The utility model relates to the technical field of protective nets, in particular to a passive protective net.

Background

In geological disaster prevention engineering, two modes of an active protection net and a passive protection net are adopted for protection, the active protection net is a protection tool which is formed by covering and wrapping various flexible nets mainly comprising steel wire rope nets on a slope or rock to be protected, restricting weathering and peeling or damage of a slope rock soil body and dangerous rock collapse, and controlling falling rocks in a certain movement range to protect pedestrians and vehicles from safely passing through. But the active protection net has high manufacturing cost and is not suitable for mountain steep mountains. The passive protection consists of four main parts, namely a steel wire rope net, an annular net, (an iron wire grid is added when small rocks fall down to be intercepted), a fixing system (an anchor rod, an anchor rope, a base and a supporting rope) decompression ring and a steel column. The steel column and the steel wire rope net are connected and combined to form a whole to form surface protection for the protected area, thereby preventing falling of collapsed rock soil bodies and playing a role in slope protection. The method is suitable for mountain steep mountains with buffer zones beside the building facilities, and can intercept rock collapse, flying stones, avalanche and debris flow outside the building facilities, so as to avoid damage of disasters to the building facilities. The passive protective net in the current market has complex structure, is inconvenient to install and is easy to damage due to the impact of larger stones.

Disclosure of Invention

The utility model aims to provide a passive flexible protective net which is simple in structure, strong in protective performance and convenient for field assembly.

In order to achieve the above object, the present utility model provides a passive flexible protection net, the structure of which comprises an annular net, a grating, a steel column system and a fixing system, wherein the annular net comprises a vertical annular net and an unfolding annular net connected with two sides of the vertical annular net, the fixing system is arranged at two sides of the steel column system and penetrates through the steel column system, the steel column system is arranged around the unfolding annular net and the inner side of the vertical annular net, and the grating is arranged between the annular net and the steel column system;

the steel column system comprises a segmented column arranged at the central axis position of the vertical ring-shaped net, middle columns arranged at two sides of the segmented column and end columns arranged at the outer sides of the middle columns, wherein the end columns, the middle columns and the segmented column are all fixed on a base, anchor rod holes are formed in the base, and the steel column system is fixed on the ground through bolt anchor rods;

the fixing system comprises an upward-pulling anchor rope, an upper supporting rope, an upper parallel rope, a lower supporting rope, a lower parallel rope, a buffer rope and a transverse constraint rope, wherein one end of the upper supporting rope and one end of the upper parallel rope sequentially pass through the end post, the middle post is fixed on the ground through an energy dissipation piece, the other end of the upper supporting rope and one end of the lower parallel rope are fixed on the segmented post through an energy dissipation piece, one end of the lower supporting rope and one end of the lower parallel rope sequentially pass through the end post, the middle post and the segmented post are fixed on the ground through an energy dissipation piece, the other end of the lower supporting rope bypasses a segmented post guide wheel at the bottom to be fixed on the ground, one end of the transverse constraint rope passes through the unfolding annular net and the vertical annular net through the end post and is fixed on the ground through the energy dissipation piece, and the other end of the transverse constraint rope is connected to the segmented post;

the segmented column is provided with a segmented column side-pull anchor rope and a buffer snap ring, and buffer ropes are arranged at the top and the bottom of the segmented column.

Preferably, six groups of end guiding wheels are arranged on the end post, the upper part of the end guiding wheel at the top is connected with the pull-up anchor rope, one side far away from the unfolding annular net is connected with the side pull anchor rope, one side close to the unfolding annular net is connected with the post top limiting rope, the lower end is transversely connected with two upper supporting ropes and one parallel rope, the middle end guiding wheel is transversely connected with the transverse constraint rope, and the lower end of the end guiding wheel at the bottom is transversely connected with two lower supporting ropes and one parallel rope.

Preferably, the top and the bottom of the middle column are both provided with middle guide wheels, the upper part of the middle guide wheels at the top is connected with the pull-up anchor rope, the lower part of the middle guide wheels passes through the column top limiting rope, the upper supporting rope and the upper parallel rope, the lower part of the middle guide wheels at the bottom passes through the lower supporting rope and the lower parallel rope, and the bottom of the middle column is provided with an anti-toppling rope on a steep slope with a slope angle smaller than 50 degrees.

Preferably, six groups of segment guide wheels are arranged on the segment column, the upper part of the segment guide wheel at the top is connected with the pull-up anchor rope, two sides of the segment guide wheel at the top are connected with the column top limit rope and the segment column side pull anchor rope, and the segment guide wheel at the top is connected with the upper parallel rope, the upper support rope and the plumb rope through the energy dissipation piece, and the lower part of the segment guide wheel at the top is connected with the segment column middle reinforcing pull anchor rope; the segmented guide wheel in the middle part is connected with the segmented column side pull anchor rope and is connected with the transverse constraint rope through the energy dissipation piece; the lower parallel ropes and the lower support ropes bypass the segmented guide wheels at the bottom end.

Preferably, the pull-up anchor ropes pass through the top ends of the end posts, the middle posts and the segmented posts and are fixed on the slope, and the distance between the pull-up anchor ropes is 150cm.

Preferably, the sectional column side-pulling anchor ropes pass through the sectional guide wheels and are fixed on the slope, and the distance between the sectional column side-pulling anchor ropes is 150cm.

Preferably, when the rock slope angle is not more than 30 degrees, the included angles formed by the end post, the middle post and the segmented post and the slope surface are all 105 degrees; when the rock slope angle is greater than 30 degrees, the included angles formed by the end post, the middle post and the sectional post and the slope surface are all 75 degrees.

Preferably, the loop breaking force of the expanded endless network and the loop of the drop endless network is greater than 160kN.

Preferably, the energy absorbing capacity of the energy dissipater is greater than 550kJ over a range of operating loads less than 280kN and displacement release of 2500 mm.

Preferably, the number of the transverse restraint ropes is 4, and the number of the side pull anchor ropes of the segmented column is 4.

Therefore, the passive flexible protective net adopting the structure has the following beneficial effects:

1. the guide wheel device is arranged on the steel column, so that the steel column is convenient to install, simple and convenient.

2. The segmentation post both sides set up the ring net that hangs down, the expansion ring net that hangs down ring net both sides are connected, and the impact force that the realization brought can be alleviated to the setting of ring net that hangs down to a great extent, lets entire system bearing capacity reinforcing.

3. The transverse constraint rope spans the whole device, so that the falling pressure of the falling rocks is equally distributed, the situation that the falling rocks fall to damage the annular net is avoided, and the protection performance is strong.

4. The design and the adoption of the energy dissipation ring further improve the impact resistance of the system, and compared with a rigid interception and slurry-built retaining wall, the original construction process is changed, and the construction period and funds are reduced.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a passive flexible protection net according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a foundation framework of a passive flexible protection network according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a passive flexible protection network embodiment of the present utility model in which lateral restraint lines are attached to segmented column side pull anchor lines;

FIG. 4 is a schematic view of an embodiment of a passive flexible protection network according to the present utility model;

FIG. 5 is a plan view of a tie-down and support structure of a passive flexible protection network embodiment of the present utility model;

FIG. 6 is a system cross-sectional view of an embodiment of a passive flexible protection network of the present utility model;

FIG. 7 is a cross-sectional view of a steel column concrete foundation of an embodiment of a passive flexible protection network of the present utility model;

FIG. 8 is a top view of a central steel column concrete foundation of one embodiment of a passive flexible protection network of the present utility model;

FIG. 9 is a top view of an end and segmented steel column concrete foundation of one embodiment of a passive flexible protection network of the present utility model;

FIG. 10 is a side view of an end post of one embodiment of a passive flexible protection network of the present utility model;

FIG. 11 is a segmented column side view of one embodiment of a passive flexible protection network of the present utility model;

FIG. 12 is a schematic view of a loop-shaped network connection of a passive flexible protection network embodiment of the present utility model;

FIG. 13 is a schematic view of an end guide wheel connection at the top of a passive flexible protection network embodiment of the present utility model;

FIG. 14 is a schematic diagram of a center guide wheel connection at the top of a passive flexible protection network embodiment of the present utility model;

FIG. 15 is a schematic view of a segment guiding wheel connection at the top end of a passive flexible protection network embodiment of the present utility model;

FIG. 16 is a schematic illustration of a segment guide wheel connection in the middle of a passive flexible protection network embodiment of the present utility model;

FIG. 17 is a front view of a segmented guide wheel at the bottom of one embodiment of a passive flexible guard network of the present utility model;

FIG. 18 is a top view of a segmented guide wheel at the bottom of one embodiment of a passive flexible guard net of the present utility model.

Wherein: 1. an upper support rope; 2. a parallel rope is arranged on the upper part; 3. a lower support rope; 4. a lower parallel rope; 5. side pulling anchor ropes; 6. the middle of the segment is reinforced with a pulling anchor rope; 7. the anchor rope is pulled by the side of the sectional column; 8. a side hanging rope; 9. a plumb line; 10. pulling up the anchor rope; 11. an anti-toppling rope; 12. a wire rope anchor rod; 13. a column top limit rope; 14. Buffer ropes at the sections; 15. a lateral restraint rope; 16. an endless wire; 161. a drop ring net; 162 unrolling the endless web; 17. an end post; 18. a middle column; 19. a segmented column; 20. a base; 21. an energy dissipation member; 22. A guide wheel; 23. anchor bolts; 24. a grille; 25. a buffer snap ring; 26. and (5) shackle.

Detailed Description

The technical scheme of the utility model is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

The utility model provides a passive flexible protective net, which comprises a ring net 16, a grid 24, a steel column system and a fixing system, wherein the ring net 16 comprises a vertical ring net 161 and an unfolding ring net 162 connected with two sides of the vertical ring net 161, the fixing system is arranged on two sides of the steel column system and penetrates through the steel column system, the steel column system is arranged around the unfolding ring net 162 and the inner side of the vertical ring net 161, and the grid 24 is arranged between the ring net 16 and the steel column system;

the steel column system comprises a segmented column 19 arranged at the central axis of the vertical ring-shaped net, middle columns 18 arranged at two sides of the segmented column 19 and end columns 17 arranged at the outer sides of the middle columns 18, wherein the end columns 17, the middle columns 18 and the segmented column 19 are all fixed on a base 20, anchor rod holes are formed in the base 20, and the steel column system is fixed on the ground through bolt anchor rods 23;

the fixing system comprises an upward-pulling anchor rope 10, an upper supporting rope 1, an upper parallel rope 2, a lower supporting rope 3, a lower parallel rope 4, a buffer rope 14 and a transverse constraint rope 15, wherein one ends of the upper supporting rope 1 and the upper parallel rope 2 sequentially pass through an end post 17, a middle post 18 and an energy dissipation piece 21 to be fixed on the ground, the other ends of the upper supporting rope 1 and the upper parallel rope 2 are fixedly arranged on a segmented post 19, one ends of the lower supporting rope 3 and the lower parallel rope 4 sequentially pass through the end post 17, the middle post 18 and the segmented post 19 and are fixedly arranged on the ground through the energy dissipation piece 21, the other ends of the lower supporting rope and the lower parallel rope 4 bypass the segmented post guide wheels at the bottom to be fixed on the ground, one ends of the transverse constraint rope pass through an unfolding annular net and a vertical annular net through the end post and are fixedly arranged on the ground through the energy dissipation piece 21, and the other ends of the transverse constraint rope are connected to the segmented post 19;

the segmented column is provided with a segmented column side pull anchor rope 7 and a buffer snap ring 25, and buffer ropes 14 are arranged at the top and the bottom of the segmented column.

Six groups of end guide wheels are arranged on the end post 17, a pull-up anchor rope 10 is connected above the end guide wheels (shown in figure 13) at the top end, a side pull anchor rope 5 is connected on the side far away from the unfolding annular net, a post top limit rope 13 is connected on the side close to the unfolding annular net, two upper support ropes 1 and one parallel rope 2 are transversely connected at the lower end, a transverse constraint rope 15 is transversely connected with the middle end guide wheels, and two lower support ropes 3 and one lower parallel rope 4 are transversely connected at the lower end of the end guide wheels at the bottom end.

The top and the bottom of the middle column 18 are both provided with middle guiding wheels, the upper part of the middle guiding wheel (as shown in fig. 14) at the top is connected with the pull-up anchor rope 10, the lower part of the middle guiding wheel passes through the column top limiting rope 13, the upper supporting rope 1 and the upper parallel rope 2, the lower part of the middle guiding wheel at the bottom passes through the lower supporting rope 3 and the lower parallel rope 4, and the bottom of the middle column 18 is provided with an anti-toppling rope 11 on a steep slope with a slope angle smaller than 50 degrees.

Six groups of segment guide wheels are arranged on the segment column 19, a pull-up anchor rope 10 is connected above the segment guide wheels (shown in figure 15) at the top end, column top limit ropes 13 and segment column side pull anchor ropes 7 are connected to two sides of the segment guide wheels at the top end, the segment guide wheels are connected with an upper parallel rope 1, an upper support 2 rope and a plumb rope 9 through energy dissipation members 21, and a segment column middle reinforcing pull anchor rope 6 is connected below the segment guide wheels at the top end; the middle section guiding wheel (as shown in figure 16) is connected with the section column side pulling anchor rope 7 and is connected with the transverse constraint rope 15 through the energy dissipation piece 21; the lower parallel ropes 4 and the lower support ropes 3 pass around the segmented guiding wheels at the bottom end (see fig. 17).

The pull-up anchor lines 10 pass through the top ends of the end posts 17, the middle post 18 and the segmented posts 19 and are fixed on the slope, and the space between the pull-up anchor lines 10 is 150cm (as shown in figure 10).

The sectional column side-pull anchor ropes 7 pass through the sectional guide wheels and are fixed on the slope, and the distance between the sectional column side-pull anchor ropes 7 is 150cm (as shown in figure 11).

When the rock slope angle is not more than 30 degrees, the included angles formed by the end post 17, the middle post 18, the segmented post 19 and the slope surface are all 105 degrees; when the rock slope angle is greater than 30 degrees, the included angles formed by the end post 17, the middle post 18 and the sectional post 19 and the slope surface are all 75 degrees.

The loop breaking force of the expanded endless wire 162 and the drop endless wire 161 is greater than 160kN. The sample web was greater than 25% of the actual web size, and the present example used an R16/3/300 ring web.

The energy absorbing capacity of the energy dissipater is greater than 550kJ over a range of operating loads less than 280kN and displacement release of 2500 mm.

The number of the transverse restraint ropes 15 is 4, and the number of the sectional column side pull anchor ropes 7 is 4.

Ring network connection description: (1) The top and bottom net rows within the vertical ropes 9 on both sides of the segmented column are only connected with the buffer ropes 14, within this range are the additional flexible net and the longitudinal strips corresponding to the 5 top and bottom net rows of adjacent meshes on both sides. (2) Four top and bottom net rows on two sides of the rest steel columns (only the inner sides are arranged at the end columns) are connected with the parallel ropes only. (3) The rest of the top-bottom net rings are only connected with the supporting ropes, and the supporting ropes and the parallel ropes in the area are combined by shackle at intervals of 3-4 net rings from the inner side of the first net ring. (4) The transverse restraint ropes 15 pass through all the along-the-way net rings, and the end parts are connected to the U-shaped energy dissipation parts connected with the side pull anchor rods or the middle hanging seats of the segmented columns.

The installation flow comprises the following steps:

1. the standard diagram (shown in figure 1) is installed according to the arrangement, and the anchor rod holes are measured and positioned according to the actual topography of the site.

2. And drilling holes according to the design, inserting an anchor rod into the anchor rod hole, and pouring cement mortar or pure cement paste with the strength grade not lower than M20.

3. The base 20 is installed, the slope angle is measured, when the slope angle is smaller than or equal to 30 degrees, the included angle formed by the steel column and the slope surface is 105 degrees, and the steel column and the side-pull anchor ropes 5 are fixed; when the slope angle is larger than 30 degrees, the included angle formed by the steel column and the slope surface is 75 degrees, and the steel column and the side pull anchor ropes 5 are fixed.

4. The U-shaped energy dissipaters 21 are each connected to their respective wire rope anchors 12 by a shackle and their positions are measured to secure the wire rope anchors 12 to the slope.

5. An upper supporting rope 1 and an upper parallel rope 2 are installed, one end of the upper parallel rope is fixed on a steel wire rope anchor rod 12 through an energy dissipation piece 21, the middle of the upper parallel rope passes through an end column and a middle column, and the other end of the upper parallel rope is fixed on a segmented column 19 through a shackle (the same is installed in the opposite direction); one end of the lower supporting rope 3 and the lower parallel rope 4 are fixed on the steel wire rope anchor rod 12 through the energy dissipation piece 21, the middle part of the lower supporting rope passes through the end column and the middle column, the winding device of the sectional column is wound, and the other end of the lower supporting rope is fixed on the steel wire rope anchor rod 12 through the energy dissipation piece 21 (the same installation opposite direction).

6. The selective procedure: the transverse restraint ropes 15 can be installed before the annular net 16 is unfolded or after connection is completed, the transverse restraint ropes 15 which are combined with the upper support ropes 1 or the lower support ropes 3 and connected to the U-shaped energy dissipation elements 21 are led out, the transverse restraint ropes 15 are folded from the ascending side of the net sheet to the beginning of the net ring to be hung, transversely penetrate through the net ring along the way to the ending, and are folded from the ascending side of the net sheet to the U-shaped energy dissipation elements 21 connected to the other end of the corresponding support ropes, if the annular net is not unfolded in place, the transverse restraint ropes 15 are temporarily and fixedly connected, and if the annular net connection is completed, the transverse restraint ropes 15 are tensioned and fixedly connected by rope clamps.

7. The ring net 16 and the grille 24 are installed.

8. Checking and debugging (mainly checking the following items, if the requirements are not met, appropriate adjustment or rework should be performed):

(1) Whether the orientation of the steel column deviates from the vertical surface obviously, namely whether the steel column deviates to the left and the right sides obviously.

(2) Whether the upper support line 1, the upper parallel line 2, the lower support line 3, the lower parallel line 4, the lateral restraint line 15, the side pull anchor line 5, etc. are connected to the correct anchor rods.

(3) Whether the wire rope on the roof and base 20 is properly threaded or not.

(4) Whether the number and the orientation of the rope clamps are correct or not, and whether the fastening degree is proper or not.

(5) The number of the holes for hanging the support ropes on the two sides of the column top and the base 20 is correct, the net is correctly connected to the upper support rope 1, the upper parallel rope 2, the lower support rope 3, the lower parallel rope 4 and the buffer rope 14, and the transverse constraint rope 15 is correctly hung.

(6) Whether the connection between the meshes is correct or not, and whether the boundary meshes are correctly connected to the edge hanging ropes 8 or not.

(7) Whether the sagging of the upper support line 1 is less than 3% of the column pitch.

Therefore, the passive flexible protective net adopting the structure has the advantages of simple structure, strong protective performance and convenience for field assembly.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims (10)

1. A passive flexible protective net, characterized in that: the steel column system is arranged around the inner sides of the unfolding annular net and the vertical annular net, and the grille is arranged between the annular net and the steel column system;

the steel column system comprises a segmented column arranged at the central axis position of the vertical ring-shaped net, middle columns arranged at two sides of the segmented column and end columns arranged at the outer sides of the middle columns, wherein the end columns, the middle columns and the segmented column are all fixed on a base, anchor rod holes are formed in the base, and the steel column system is fixed on the ground through bolt anchor rods;

the fixing system comprises an upward-pulling anchor rope, an upper supporting rope, an upper parallel rope, a lower supporting rope, a lower parallel rope, a buffer rope and a transverse constraint rope, wherein one end of the upper supporting rope and one end of the upper parallel rope sequentially pass through the end post, the middle post is fixed on the ground through an energy dissipation piece, the other end of the upper supporting rope and one end of the lower parallel rope are fixed on the segmented post through an energy dissipation piece, the lower supporting rope and one end of the lower parallel rope sequentially pass through the end post, the middle post and the segmented post are fixed on the ground through an energy dissipation piece, the other end of the lower parallel rope bypasses a bottom segmented post guide wheel to be fixed on the ground, one end of the transverse constraint rope passes through the unfolding annular net and the vertical annular net through the end post and is fixed on the ground through an energy dissipation piece, and the other end of the transverse constraint rope is connected on the segmented post;

the segmented column is provided with a segmented column side-pull anchor rope and a buffer snap ring, and buffer ropes are arranged at the top and the bottom of the segmented column.

2. A passive flexible protection network according to claim 1, characterized in that: six groups of end guide wheels are arranged on the end post, the upper part of the end guide wheel at the top is connected with the pull-up anchor rope, one side far away from the unfolding annular net is connected with the side pull anchor rope, one side close to the unfolding annular net is connected with a post top limit rope, the lower end is transversely connected with two upper supporting ropes and one parallel rope, the middle end guide wheel is transversely connected with the transverse constraint rope, and the lower end of the end guide wheel at the bottom is transversely connected with two lower supporting ropes and one lower parallel rope.

3. A passive flexible protection network according to claim 2, characterized in that: the top and the bottom of the intermediate column are both provided with middle guide wheels, the upper part of the middle guide wheels at the top is connected with the pull-up anchor rope, the lower part of the middle guide wheels passes through the column top limiting rope, the upper supporting rope and the upper parallel rope, the lower part of the middle guide wheels at the bottom passes through the lower supporting rope and the lower parallel rope, and the bottom of the intermediate column is provided with an anti-toppling rope on a steep slope with a slope angle smaller than 50 degrees.

4. A passive flexible protection network according to claim 3, characterized in that: six groups of segment guide wheels are arranged on the segment column, the upper part of the segment guide wheel at the top is connected with the pull-up anchor rope, two sides of the segment guide wheel at the top are connected with the column top limit rope and the segment column side pull anchor rope, and the segment guide wheel at the top is connected with the upper parallel rope, the upper supporting rope and the plumb rope through the energy dissipation piece, and the lower part of the segment guide wheel at the top is connected with the segment column middle reinforcing pull anchor rope; the segmented guide wheel in the middle part is connected with the segmented column side pull anchor rope and is connected with the transverse constraint rope through the energy dissipation piece; the lower parallel ropes and the lower support ropes bypass the segmented guide wheels at the bottom end.

5. The passive flexible protection network of claim 4, wherein: the pull-up anchor ropes penetrate through the top ends of the end posts, the middle posts and the segmented posts and are fixed on the slope, and the distance between the pull-up anchor ropes is 150cm.

6. A passive flexible protection network according to claim 5, characterized in that: the sectional column side-pull anchor ropes penetrate through the sectional guide wheels and are fixed on the slope, and the distance between the sectional column side-pull anchor ropes is 150cm.

7. The passive flexible protection network of claim 6, wherein: when the rock slope angle is not more than 30 degrees, the included angles formed by the end column, the middle column and the sectional column and the slope are all 105 degrees; when the rock slope angle is greater than 30 degrees, the included angles formed by the end post, the middle post and the sectional post and the slope surface are all 75 degrees.

8. The passive flexible protection network of claim 7, wherein: the ring chain breaking force of the expanded endless network and the vertical endless network is greater than 160kN.

9. The passive flexible protection network of claim 8, wherein: the energy absorbing capacity of the energy dissipater is greater than 550kJ over a range of operating loads less than 280kN and displacement release of 2500 mm.

10. A passive flexible protection network according to claim 9, characterized in that: the number of the transverse constraint ropes is 4, and the number of the sectional column side-pull anchor ropes is 4.

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