Suspension cable type large-energy-level flexible protection system

Abstract

The suspension cable type large-energy-level flexible protection system comprises a flexible net piece and a transverse main rope, the top of the flexible net piece is connected with the transverse main rope, and the two ends of the transverse main rope are suspended and not connected with a slope body; the flexible protection system further comprises a top main cable and a plurality of longitudinal suspension cables arranged at intervals, the top main cable is a catenary and is transversely arranged above the transverse main rope, the two ends of the top main cable are connected to the slope body, the transverse main rope is connected with the top main cable through the longitudinal suspension cables, the flexible mesh is suspended below the top main cable, and the longitudinal suspension cables are connected to the slope body. In addition, the transverse main rope roughly tends to horizontally extend under the tensioning effect of the longitudinal suspension inhaul cables. The top main cable in a catenary form is matched with the longitudinal suspension cable, the problem of gravity sagging of the large-span flexible mesh and the transverse main rope is thoroughly solved, it is guaranteed that the transverse main rope tends to be horizontal all the time, and then it is guaranteed that the flexible mesh is evenly stressed and can cover a large-span groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope protection engineering, and particularly relates to a suspension type large-energy-level flexible protection system. BACKGROUND

[0002] Rockfall, collapse and debris flow disasters have the characteristics of suddenness and randomness, large scale and high destructiveness, which pose a serious threat to transportation infrastructure and human activities. Common protection structures such as passive protection nets, active protection nets, retaining walls and debris flow blocking dams do not have the characteristics of large-span and large-energy-level impact energy dissipation. The passive protection net has a limited protection energy level, and it is difficult and costly to maintain and clean. None of the above can meet the protection requirements under large-span and large-energy-level impact, and the existing large-energy-level flexible protection system has the problem of gravity sagging in the middle region of the horizontal main rope during installation (see Figure 1 ), and the energy dissipation capacity of the existing large-energy-level flexible protection system is also insufficient.

[0003] To this end, the applicant proposes a suspension type large-energy-level flexible protection system for large-span and large-energy-level slope protection engineering to solve the problem of easy sagging of the horizontal main rope during installation of the existing large-energy-level flexible protection system. SUMMARY

[0004] The technical problem to be solved by the present application is to improve the existing large-energy-level flexible protection system to solve the problem of uneven stress on the structure caused by easy sagging of the horizontal main rope during installation of the large-energy-level protection system.

[0005] The technical solution adopted by the present application to solve the technical problem is that the present application provides a suspension type large-energy-level flexible protection system, which comprises a flexible net and a horizontal main rope, the top of the flexible net is connected with the horizontal main rope, and the two ends of the horizontal main rope are suspended and not connected with the slope body, characterized in that it further comprises a top main cable and a plurality of spaced longitudinal suspension cables.

[0006] The top main cable is a catenary line, which is horizontally arranged above the horizontal main rope and connected to the slope body at both ends; the horizontal main rope is connected to the top main cable through a plurality of longitudinal suspension cables, so that the flexible net is suspended below the top main cable; and the horizontal main rope is approximately horizontally extended under the tension of each longitudinal suspension cable.

[0007] Further, the suspension type large-energy-level flexible protection system further comprises pile bodies fixed on the slope bodies on both sides of the flexible net respectively.

[0008] The two sides of the top main cable are connected to the slope body after crossing the top of the corresponding pile body, forming the catenary; and the top main cable is slidable relative to the top of the pile body.

[0009] Further, the top of the pile body is provided with a first pulley; the top main cable passes through the wheel groove of the first pulley when crossing the top of the pile body, forming a cooperative relationship with the first pulley.

[0010] Further, the two sides of the top main cable are each provided with a first energy dissipation device.

[0011] Further, the first energy dissipation device includes a fixing member and an energy dissipation member;

[0012] The fixing member is anchored to the slope body by a first anchor rod;

[0013] One end of the energy dissipation member is connected to the end of the top main cable, which can move relative to the fixing member under the action of the top main cable and achieve energy dissipation by plastic deformation.

[0014] Further, a pin shaft is arranged in the cavity of the fixing member;

[0015] The energy dissipation member is a long strip-shaped steel member, the part away from the top main cable extends into the cavity of the fixing member and forms a folded structure around the pin shaft.

[0016] Further, the longitudinal suspension cable is fixedly connected with the top main cable and the horizontal main rope by a friction type fastener.

[0017] Further, the friction type fastener includes a first clamping plate and a second clamping plate;

[0018] The first clamping plate and the second clamping plate are spliced together and fixedly connected by a bolt, clamping the top main cable or the horizontal main rope; wherein the second clamping plate is provided with a steel rope connecting hole for connecting the longitudinal suspension cable.

[0019] Further, the suspension cable type large energy level flexible protection system further includes side steel ropes;

[0020] The two sides of the flexible mesh are each provided with the side steel ropes, which are connected to the side edges of the flexible mesh after passing around the second anchor rod and the third anchor rod corresponding to the upper and lower sides of the flexible mesh and anchored to the slope body, for limiting the displacement amplitude of the side edges of the flexible mesh.

[0021] Further, the top of the second anchor rod and the third anchor rod is provided with a second pulley, and the side steel rope passes through the wheel groove of the second pulley when passing through the top of the second anchor rod and the third anchor rod, and forms a cooperation relationship with the second pulley.

[0022] Wherein, the side steel rope is further provided with a second energy dissipation device between the second anchor rod and the third anchor rod.

[0023] The beneficial effects of the present application are:

[0024] (1) The top main cable in the form of catenary line cooperates with the longitudinal suspension cable, completely eliminates the gravity sagging problem of large-span flexible mesh and transverse main rope, ensures that the transverse main rope always tends to be horizontal, and further ensures that the flexible mesh is uniformly stressed, and can cover a larger span (hundred-meter level) trench;

[0025] (2) It has a multi-stage energy dissipation mechanism, which is respectively: (I) when the flexible mesh responds to interception, the energy is absorbed by the elastic deformation of the flexible mesh itself; (II) when the flexible mesh responds to interception, the transverse main rope transmits the load to the top main cable through the longitudinal suspension cable, which causes the instantaneous displacement of the top main cable along the catenary line direction, triggering the first energy dissipation device to absorb energy; (III) when the flexible mesh responds to interception, the side steel rope absorbs energy through the second energy dissipation device;

[0026] (3) The top main cable is guided by the first pulley with the top of the pile, and the side steel rope is guided by the second pulley, which can greatly reduce the friction resistance, ensure the smoothness of the load transmission path, avoid local overload, and prolong the overall life of the flexible protection system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a display diagram of the existing large energy level flexible protection system installation, and the middle region of the transverse main rope appears due to gravity sagging problem;

[0028] Figure 2 is a structure display diagram of the suspension cable type large energy level flexible protection system provided by the present application during installation;

[0029] Figure 3 is an external structure diagram of the first energy dissipation device in the present application;

[0030] Figure 4 is Figure 3 the internal structure display diagram of the first energy dissipation device;

[0031] Figure 5 is a structure display diagram of the first pulley in the present application;

[0032] Figure 6 is a structure display diagram of the second pulley in the present application;

[0033] Figure 7 is the effect display diagram of the friction type fastener clamping on the top main cable or transverse main rope in the application. DETAILED DESCRIPTION

[0034] The application will be further described in detail below in combination with specific embodiments, but the embodiments of the application are not limited thereto.

[0035] Figure 2 A suspension cable type large energy level flexible protection system provided by the application is shown, which is usually installed at a mountain groove where rockfall, collapse, debris flow and other disasters are prone to occur, and through the flexible net 100, rockfall is intercepted, the impact kinetic energy of rockfall is absorbed, and the horizontal displacement of rockfall is limited to protect the safety of target buildings, roads, railways and other infrastructures and personnel.

[0036] In the application, the flexible net 100 is suspended and connected to the transverse main rope 200 at the top. Since the width of some mountain grooves is relatively large, the span of the flexible net 100 must also be set relatively large, which can reach dozens of meters or even hundreds of meters, so that the central region of the flexible net 100 and the transverse main rope 200 will sag due to gravity, which will cause local structural changes of the flexible net 100 and uneven stress problems.

[0037] To this end, in order to avoid the above problems, in the patent, the two ends of the transverse main rope 200 are designed in a suspended form and are not directly connected to the slope body. Then a top main cable 300 is arranged above the transverse main rope 200, the top main cable 300 is a catenary line, and the two ends thereof are connected to the slope body; after the top main cable 300 is arranged, the transverse main rope 200 is connected to the top main cable 300 through a plurality of longitudinal suspension cables 400, the flexible net 100 is suspended below the top main cable 300, and by reasonably controlling the spacing and length of each transverse main rope 200 and utilizing the tensioning effect of each longitudinal suspension cable 400, the sagging of the transverse main rope 200 is limited, so that it is approximately horizontally extended, and then the problem that the flexible net 100 below sags due to gravity and causes local structural changes and uneven stress problems can be avoided.

[0038] Since the top main cable 300 is a catenary line, the lengths of the longitudinal suspension cables 400 are not consistent when designed, the closer to the middle, the shorter, and the closer to the two sides, the longer, and the longitudinal suspension cables 400 can be arranged at equal intervals. The specific length of each longitudinal suspension cable 400 is calculated according to specific conditions, and the calculation condition is that the transverse main rope 200 is kept horizontally extended.

[0039] The catenary line in the application refers to the curved state of the top main cable 300 under its own weight when it is supported at both ends in a uniform gravitational field.

[0040] The present application also provides a pile 510 on the slope of the two sides of the flexible net 100, for supporting the top main cable 300. The two sides of the top main cable 300 are connected to the slope from the top of the corresponding pile 510, forming the catenary. And the top main cable 300 is slidable relative to the top of the pile 510, specifically, the top of the pile 510 is provided with a first pulley 520, and the top main cable 300 passes through the wheel groove of the first pulley 520 when crossing the top of the pile 510, and forms a rolling friction cooperation with the first pulley 520, so as to reduce the friction resistance when the top main cable 300 moves.

[0041] The structure of the first pulley 520 is as shown in Figure 5 , which is rotatably arranged on the first mounting seat 530 and fixed on the top of the pile 510 through the first mounting seat 530.

[0042] In terms of energy consumption, the present application provides a first energy consumption device 610 on each side of the top main cable 300. When intercepting the response, the flexible net 100 deforms and transmits the force to the top main cable 300 through each transverse main rope 200, and the top main cable 300 transmits the force to the first energy consumption device 610 on both sides, realizing energy dissipation.

[0043] In a preferred embodiment, referring to Figure 2 , Figure 3 and Figure 4 , the first energy consumption device 610 includes a fixing member 611 and an energy consumption member 612. The fixing member 611 is anchored to the slope by a first anchor rod 620. One end of the energy consumption member 612 is connected to the end of the top main cable 300, and the energy consumption member 612 can move relative to the fixing member 611 under the action of the top main cable 300 and realize energy consumption by plastic deformation.

[0044] Specifically, the fixing member 611 includes a bottom plate 611b and a cavity 611a above the bottom plate 611b. The bottom plate 611b is fixed to the slope surface by the first anchor rod 620, and a pin shaft 630 is arranged in the cavity 611a. The energy consumption member 612 is a long strip steel member (such as a reinforcing bar), one end of which is connected to the end of the top main cable 300, and the part away from the top main cable 300 extends into the cavity 611a and forms a folded structure around the pin shaft 630. The first energy consumption device 610 is directly connected between the slope surface and the top main cable 300, and has the advantage of being easy to replace after starting.

[0045] The present application is arranged at a mountain groove, and the falling rocks falling from above the groove are intercepted by the flexible net 100, and when the falling rocks hit the flexible net 100, the interception response occurs, at this time, the flexible net 100 deforms, the transverse main rope 200 deforms, the deformation of the transverse main rope 200 transmits the force to the top main cable 300 through the longitudinal suspension cable 400, so that the top main cable 300 instantaneously displaces, and the instantaneous displacement of the top main cable 300 drives the movement of the energy consumption piece 612 through the connection, when the energy consumption piece 612 moves, the energy consumption piece 612 in the cavity 611a moves close to the pin shaft 630, and in the moving process, the energy consumption piece 612 is extruded by the pin shaft 630 and plastically deforms, so that the plastic deformation of the energy consumption piece 612 can be used to dissipate energy.

[0046] In a preferred embodiment, referring to Figure 1 , the upper and lower ends of the longitudinal suspension cable 400 are fixedly connected with the top main cable 300 or the transverse main rope 200 through the friction type fastener 700.

[0047] Specifically, referring to Figure 7 , the friction type fastener 700 comprises a first clamping plate 710 and a second clamping plate 720. The first clamping plate 710 and the second clamping plate 720 are provided with a semicircular groove respectively, and the two are spliced together and fixedly connected through a bolt 730, so that the top main cable 300 or the transverse main rope 200 is clamped in the two semicircular grooves, and the purpose of fixed connection through friction is achieved. The second clamping plate 720 is used to be connected with the longitudinal suspension cable 400, and is provided with a steel rope connecting hole 721 for connecting the longitudinal suspension cable 400, and when connected, the end of the longitudinal suspension cable 400 passes through the steel rope connecting hole 721 and forms a back segment, and then the back segment and the non-back segment are locked through a corresponding locking member, so that the connection between the longitudinal suspension cable 400 and the friction type fastener 700 is achieved.

[0048] The above-mentioned friction type fastener 700 has the characteristics of simple structure, convenient installation and disassembly, and can realize the quick connection or disassembly of the longitudinal suspension cable 400 and the top main cable 300 or the transverse main rope 200, and the connection effect is stable and reliable.

[0049] In a preferred embodiment of the present application, the suspension cable type large energy level flexible protection system further comprises a side steel rope 810. Referring to Figure 1 , the two sides of the flexible net 100 are provided with the side steel rope 810, the side steel rope 810 is connected with the side edge of the flexible net 100 after passing through the second anchor rod 820 and the third anchor rod 830 corresponding to the upper and lower sides of the flexible net 100 and anchored on the slope body, and is used for limiting the displacement amplitude of the side edge of the flexible net 100.

[0050] In an embodiment, the partial section of the side steel cable 810 is arranged side by side with the boundary rope of the side edge of the flexible net 100, and the connection and fixation of the two are realized by the lock buckle, so as to achieve the purpose of limiting the displacement amplitude of the side edge of the flexible net 100 by the side steel cable 810.

[0051] In another embodiment, the longitudinal suspension cable 400 on both sides can also be extended to be connected with the bottom corner position of the flexible net 100. When the side steel cable 810 is connected, the extended part of the longitudinal suspension cable 400 is first connected with the boundary rope of the side edge of the flexible net 100, and then the side steel cable 810 is connected and fixed with the extended part of the longitudinal suspension cable 400, so as to also achieve the purpose of limiting the displacement amplitude of the side edge of the flexible net 100 by the side steel cable 810.

[0052] In addition, referring to Figure 1 , the top of the second anchor rod 820 and the third anchor rod 830 is provided with a second pulley 840, and the side steel cable 810 passes through the wheel groove of the second pulley 840 when passing through the top of the second anchor rod 820 and the third anchor rod 830, and forms a rolling friction cooperation with the second pulley 840, so as to reduce the friction resistance when the side steel cable 810 moves. The structure of the second pulley 840 is as shown in Figure 6 , which is rotatably arranged on the second mounting seat 860 and fixed on the top of the second anchor rod 820 or the third anchor rod 830 through the second mounting seat 860

[0053] Among them, the side steel cable 810 is also provided with a second energy dissipation device 850 between the second anchor rod 820 and the third anchor rod 830, and the second energy dissipation device 850 can be a pressure relief ring or other energy dissipation device commonly used in passive protection systems.

[0054] The above-mentioned side steel cable 810 and the second energy dissipation device 850 can limit the displacement amplitude of the net from both sides of the flexible net 100 when the flexible net 100 responds to interception, and simultaneously realize energy dissipation.

[0055] The suspension cable type large energy level flexible protection system of the present application uses the top main cable 300 of the catenary structure as the core bearing member, suspends the large-span flexible net 100 above the mountain groove, and forms a high-efficiency interception barrier. The system works cooperatively through the following mechanisms to realize large-span and large-energy-level impact protection.

[0056] (1) Suspension cable bearing and gravity balance:

[0057] The top main cable 300 spans the groove in a catenary form, is anchored to the slope body after passing over the top of the pile body 510, and forms a slidable support through the first pulley 520. The longitudinal suspension cable 400 is arranged in a non-equal length according to the catenary curvature (short in the middle and long on both sides), and suspends the horizontal main rope 200 at multiple points below the top main cable 300. This design utilizes the natural mechanical properties of the catenary to convert the gravity load of the flexible mesh 100 and the horizontal main rope 200 into axial tension of the top main cable 300, and forcibly keeps the horizontal main rope 200 horizontally extended through the tensioning action of the longitudinal suspension cable 400, thereby completely eliminating the sagging deformation problem caused by large span in the traditional system.

[0058] (2) Multi-stage energy dissipation mechanism:

[0059] When the rockfall impacts the flexible mesh 100, the system dissipates the impact kinetic energy through three stages.

[0060] First-stage energy dissipation: The flexible mesh 100 absorbs the initial impact energy through elastic deformation and disperses the load to the horizontal main rope 200;

[0061] Second-stage energy dissipation: The horizontal main rope 200 transmits the load to the top main cable 300 through the longitudinal suspension cable 400, causing instantaneous displacement of the top main cable 300 along the catenary direction, triggering the first energy dissipation device 610, so that the energy dissipation piece 612 plastically bends and deforms under the constraint of the pin shaft 630 in the fixing piece 611, and dissipates energy through metal yield;

[0062] Third-stage energy dissipation: The side steel rope 810 absorbs energy through the second energy dissipation device 850 (such as a pressure relief ring), limits the lateral displacement amplitude of the flexible mesh 100, and prevents local tearing.

[0063] (3) Friction optimization:

[0064] The rolling friction cooperation between the top main cable 300 and the first pulley 520, and the rolling friction cooperation between the side steel rope 810 and the second pulley 840 greatly reduces the friction resistance of the system during impact, ensuring the smoothness of the load transmission path.

[0065] In summary, the application reconstructs the mechanical transmission path of the traditional flexible protection system, takes “gravity pre-tensioning-multi-stage energy dissipation-friction optimization” as the core principle, realizes the collaborative optimization of large span and large energy level impact protection, and significantly improves the reliability and durability of the system.

[0066] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A suspension-type high-energy flexible protection system, comprising a flexible mesh (100) and a transverse main rope (200), wherein the top of the flexible mesh (100) is connected to the transverse main rope (200), and both ends of the transverse main rope (200) are suspended and not connected to the slope, characterized in that, It also includes a top main cable (300) and multiple spaced longitudinal suspension cables (400). The top main cable (300) is a catenary, which is laid horizontally above the horizontal main rope (200) and connected to the slope at both ends; the horizontal main rope (200) is connected to the top main cable (300) through multiple longitudinal suspension cables (400), so that the flexible net (100) is suspended below the top main cable (300); and the horizontal main rope (200) tends to extend horizontally under the tension of each of the longitudinal suspension cables (400).

2. The suspension-type high-energy flexible protection system according to claim 1, characterized in that, It also includes piles (510) that are fixed on the slopes on both sides of the flexible mesh (100). The top main cable (300) crosses over the top of the corresponding pile (510) on both sides and connects to the slope to form the catenary; and the top main cable (300) is slidable relative to the top of the pile (510).

3. The suspension-type high-energy flexible protection system according to claim 2, characterized in that, The top of the pile (510) is provided with a first pulley (520); when the top main cable (300) crosses over the top of the pile (510), it passes through the groove of the first pulley (520) and forms a cooperative relationship with the first pulley (520).

4. The suspension-type high-energy flexible protection system according to claim 3, characterized in that, The top main cable (300) is equipped with a first energy dissipation device (610) on both sides.

5. A suspension-type high-energy flexible protection system according to claim 4, characterized in that, The first energy-consuming device (610) includes a fixing member (611) and an energy-consuming member (612). The fastener (611) is anchored to the slope by the first anchor rod (620); One end of the energy-consuming component (612) is connected to the end of the top main cable (300), and it can move relative to the fixing component (611) under the force of the top main cable (300) moving and consume energy by undergoing plastic deformation.

6. A suspension-type high-energy flexible protection system according to claim 4, characterized in that, A pin (630) is provided in the cavity (611a) of the fastener (611). The energy-consuming component (612) is a long strip of steel, the part of which extends into the cavity (611a) of the fixing component (611) and bypasses the pin (630) to form a folded structure.

7. A suspension-type high-energy flexible protection system according to any one of claims 1 to 6, characterized in that, The longitudinal suspension cable (400) is fixedly connected to the top main cable (300) and the transverse main rope (200) by friction fasteners (700).

8. A suspension-type high-energy flexible protection system according to claim 7, characterized in that, The friction fastener (700) includes a first clamping plate (710) and a second clamping plate (720); The first clamping plate (710) and the second clamping plate (720) are joined together and fastened together by bolts (730) to clamp the top main cable (300) or the transverse main rope (200); wherein, the second clamping plate (720) is provided with a steel rope connection hole (721) for connecting the longitudinal suspension cable (400).

9. A suspension-type high-energy flexible protection system according to any one of claims 1 to 6, characterized in that, It also includes side steel ropes (810); Both sides of the flexible mesh (100) are equipped with side steel ropes (810). The side steel ropes (810) pass through the second anchor rods (820) and the third anchor rods (830) that correspond to the upper and lower sides of the flexible mesh (100) and are anchored to the slope, respectively, and are connected to the side of the flexible mesh (100) to limit the displacement of the side of the flexible mesh (100).

10. A suspension-type high-energy flexible protection system according to claim 9, characterized in that, The top of the second anchor rod (820) and the third anchor rod (830) are both provided with a second pulley (840). When the side steel rope (810) passes around the top of the second anchor rod (820) and the third anchor rod (830), it passes through the groove of the second pulley (840) and forms a cooperative relationship with the second pulley (840). The side steel rope (810) is further provided with a second energy dissipation device (850) between the second anchor rod (820) and the third anchor rod (830).

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