Protective device for side slope maintenance

Abstract

The utility model relates to the technical field of side slope maintenance, and particularly discloses a protection device for side slope maintenance. According to the scheme, the auxiliary anchor rod is slidably installed on the main anchor rod, the positioning structure is arranged to lock the sliding position of the auxiliary anchor rod, the protective net can dynamically adjust the relative position of the main anchor rod and the auxiliary anchor rod according to the slope gradient, and therefore the included angle between the protective net and the slope surface is changed. When the slope gradient is steep and the falling rock splashing height is large, an operator can slide the auxiliary anchor rods outwards along the sliding grooves of the main anchor rods, the included angle between the protective net and the slope surface is increased, the covering range of the protective net is expanded upwards at the moment, and broken stones splashed at the high position are effectively intercepted; on the contrary, for a gentle slope or attached slope rolling stone scene, the auxiliary anchor rods slide inwards to reduce the included angle, the protective net is attached to the slope surface more tightly, and the retarding effect on low-altitude rolling stones is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope maintenance, in particular to a protection device for slope maintenance. BACKGROUND

[0002] Slope is a common structure form in highway, railway, mine and other engineering, which is prone to instability under the influence of natural weathering, rain erosion or human disturbance and other factors. Slope maintenance is an important link to ensure engineering safety, but there are often safety hazards such as rockfall and local collapse during maintenance. For example, loose rock mass may suddenly collapse under the action of mechanical vibration or water seepage, posing a direct threat to maintenance personnel and equipment; in addition, the surface fissure development area of the slope is prone to falling debris under the action of wind or temperature change, forming unpredictable falling risk. Therefore, how to protect dynamic risks in real time during maintenance operation has become a key technical problem to improve construction safety.

[0003] At present, slope protection mainly uses fixed protection structure, and the degree of rockfall splashing is closely related to the slope gradient, rock mass fragmentation and collision conditions. In steep slope, the initial speed of rockfall is high, and the bouncing trajectory is complex. The existing fixed protection net may only intercept part of the low-altitude debris due to the fixed inclination, and the high-altitude splashing debris is easy to bypass the edge of the net body, which makes the slope maintenance process have safety risk. CONTENT OF THE INVENTION

[0004] In order to improve the problems existing in the above protection structure, the present application provides a protection device for slope maintenance.

[0005] The protection device for slope maintenance provided by the present application adopts the following technical scheme:

[0006] A protection device for slope maintenance, comprising a plurality of main anchor rods and a plurality of auxiliary anchor rods, each main anchor rod and each auxiliary anchor rod corresponding one by one, one end of the auxiliary anchor rod being slidably installed on the main anchor rod and sliding along the length direction of the main anchor rod, and the main anchor rod being provided with a positioning structure for locking and positioning the sliding of the auxiliary anchor rod;

[0007] Further comprising a protection net, the protection net being arranged on each main anchor rod in turn, and the main anchor rod being provided with a anti-dropping structure for anti-dropping positioning of the protection net.

[0008] By adopting the technical scheme, the auxiliary anchor rod is slidably installed on the main anchor rod, and the positioning structure is arranged to lock the sliding position of the auxiliary anchor rod, so that the relative position of the main anchor rod and the auxiliary anchor rod can be dynamically adjusted according to the slope gradient of the slope, so as to change the included angle between the protective net and the slope surface. When the slope is steep and the flying height of the falling stones is large, the operator can slide the auxiliary anchor rod outward along the sliding groove of the main anchor rod to increase the included angle between the protective net and the slope surface (for example, from 30° to 60°), at this time, the coverage range of the protective net is expanded upward, and the high-position flying stones are effectively intercepted; on the contrary, for the gentle slope or the slope-attached rolling stone scene, the auxiliary anchor rod is slid inward to reduce the included angle (for example, from 60° to 20°), the protective net is more closely attached to the slope surface, and the blocking effect on the low-altitude rolling stones is enhanced. The anti-disengagement structure can always press the edge of the protective net against the main anchor rod to prevent the dislocation of the net body caused by the impact of the falling stones. The structure realizes stepless adjustment of the protection angle, solves the problem of the interception blind area caused by the fixed protection net due to the fixed inclination, and meets the diversified protection needs of different slope gradients.

[0009] Optionally, the positioning structure comprises a sliding block and a threaded locking rod, a sliding groove is formed in the circumferential wall of the main anchor rod along the length direction, the sliding block is rotatably installed at the end of the auxiliary anchor rod and slidably installed in the sliding groove, a through hole is formed in the sliding block, and a plurality of threaded holes penetrating through the sliding groove are formed in the circumferential wall of the main anchor rod along the length direction of the sliding groove.

[0010] By adopting the technical scheme, the positioning structure converts the linear movement of the auxiliary anchor rod into the angle adjustment of the protective net through the sliding cooperation of the sliding block and the sliding groove. When it is necessary to adjust the inclination of the protective net, the sliding block is pushed along the sliding groove of the main anchor rod to drive the auxiliary anchor rod to move synchronously, at this time, the through hole in the sliding block is aligned with the threaded hole in the circumferential wall of the main anchor rod, and the sliding block position can be fixed by inserting the threaded locking rod. For example, when the sliding block slides from the bottom end to the top end of the sliding groove, the auxiliary anchor rod extends outward, so that the included angle between the protective net and the slope surface is increased from 20° to 50°, and the interception height is expanded; conversely, the included angle is reduced. The cooperation of the threaded locking rod penetrating through the through hole and the threaded hole forms a rigid constraint to prevent the sliding block from retreating under the impact of the falling stones. This design realizes accurate locking of the angle through mechanical linkage, ensures the stability of the protective net under dynamic load, simplifies the adjustment operation, and can be completed by one person, which significantly improves the construction efficiency.

[0011] Optionally, the anti-disengagement structure comprises a fixed rod and an anti-disengagement rod, two fixed rods are arranged, and the two fixed rods are fixedly installed on the two circumferential walls of the main anchor rod near the end portion.

[0012] By adopting the technical scheme, in the anti-falling structure, two fixing rods are vertically welded to the end wall of the main anchor rod, and the anti-falling rod is connected with the fixing rod through a hinge point and can rotate 90° around the shaft. When installing the protective net, the anti-falling rod is rotated from the horizontal storage position to the vertical working position, the end of the anti-falling rod is clamped into the buckle ring at the edge of the protective net to form physical limiting. When the rockfall impacts the protective net, the impact force is transmitted to the fixing rod through the anti-falling rod, and then is dispersed to the slope body by the main anchor rod to avoid the net body from falling off the anchor rod. For example, when intercepting large rockfall, the lever action of the anti-falling rod can convert the impact torque into the shearing force of the fixing rod, thereby reducing the risk of pulling out the anchor rod. The structure cooperates the rigid constraint and the lever force transmission to enhance the impact resistance of the protective net, and is especially suitable for high-position and high-energy rockfall scenes.

[0013] Optionally, the main anchor rod is hollow and internally provided with an anchor cable structure for improving the stability of the end of the main anchor rod.

[0014] By adopting the technical scheme, the main anchor rod is designed to be hollow, and the anchor cable structure is arranged inside to enhance the anchoring stability. When the main anchor rod is inserted into the slope body, the inserting rod inside the main anchor rod is contracted in the hollow chamber under the action of the elastic member, at this time, the main anchor rod is preliminarily fixed only by the friction force between the rod body and the rock-soil. When encountering soft soil or strong impact load, the operator triggers the anchor cable structure to make the inserting rod extend out of the through hole and be embedded into the surrounding rock mass to form multi-point anchoring. For example, the inserting rod can be in the form of a barb and is engaged with the rock-soil after being inserted to improve the pull-out resistance by 2-3 times. The hollow structure also allows the grouting material to be poured to further fill the gap between the rod body and the hole wall and to enhance the overall anchoring strength. The design adapts to different geological conditions (such as broken rock mass and loose soil layer) through the dynamic anchoring mechanism to significantly improve the bearing capacity of the main anchor rod.

[0015] Optionally, the anchor cable structure comprises inserting rods, elastic members, pressing rods and pushing blocks, the inserting rods are provided in plurality, the circumferential wall of the main anchor rod is provided with through holes in plurality and spaced apart in the circumferential direction, the inserting rods are slidingly installed in the hollow chamber of the main anchor rod and the ends thereof can extend out of the through holes, the elastic members are provided in plurality and correspond to the inserting rods, are sleeved outside the inserting rods and can make the ends of the inserting rods retract from outside of the main anchor rod into the side wall of the main anchor rod.

[0016] The side wall of the main anchor rod is provided with a containing groove and a limiting groove, one end of the containing groove is communicated with one end of the limiting groove, and the extension direction of the containing groove and the extension direction of the limiting groove are perpendicular to each other, one end of the pressing rod is slidingly installed in the containing groove, the other end is located in the hollow chamber of the main anchor rod and is fixedly connected with the pushing block, the side wall of the pushing block is in the form of a wedge-shaped inclined surface and can push the ends of the inserting rods away from the pushing block, and the ends of the inserting rods away from the pushing block extend out of the main anchor rod through the through holes.

[0017] By adopting the technical scheme, the anchor cable structure is linked with the wedge-shaped slope of the pressing rod and the pushing block, and the insertion rod is driven to extend out of the main anchor rod. When the pressing rod slides along the accommodating groove, the wedge-shaped slope of the pushing block extrudes the end of the insertion rod, overcomes the resistance of the elastic member, and forces the insertion rod to extend out of the through hole. For example, when the pressing rod moves 10 mm, the slope of the pushing block can push the insertion rod out by 30 mm, forming a mechanical gain. After the insertion rod extends out, the barb structure of the insertion rod is embedded in the rock-soil, and the elastic member provides a pre-tightening force to ensure that the insertion rod is in close contact with the rock mass. When the operation is reversed, the pressing rod is reset, and the elastic member pulls the insertion rod to retract, facilitating the recovery of the main anchor rod. The structure realizes efficient extension and retraction of the insertion rod through the composite transmission of the lever and the slope, solves the problem of insufficient anchoring force of the traditional anchor rod in complex geology, and supports repeated use.

[0018] Optionally, the bottom of the main anchor rod and the auxiliary anchor rod is provided with a pointed end.

[0019] By adopting the technical scheme, the bottom of the main anchor rod and the auxiliary anchor rod is designed as a pointed end, which can reduce the end resistance when inserted into the slope. For example, when the angle of the pointed end is 30°, the insertion force can be concentrated to penetrate hard rock layers or dense soil layers, and the insertion efficiency is improved by 40% compared with flat-end anchor rods. The pointed end structure also guides the anchor rod to penetrate the slope along the preset path, avoiding the anchoring failure caused by deviation. For loose accumulation slope, the pointed end design can penetrate the surface floating soil and reach the stable rock layer, ensuring the consistency of the anchoring depth. This design optimizes the shape of the end of the anchor rod, reduces the construction difficulty, and is suitable for various geological conditions.

[0020] In summary, the present application has at least one of the following beneficial technical effects:

[0021] The present application slides the auxiliary anchor rod on the main anchor rod and locks the sliding position of the auxiliary anchor rod by setting a positioning structure, so that the relative position of the main anchor rod and the auxiliary anchor rod can be dynamically adjusted according to the slope of the slope, so as to change the included angle between the protective net and the slope surface. When the slope is steep and the flying height of the falling stones is large, the operator can slide the auxiliary anchor rod outward along the sliding groove of the main anchor rod to increase the included angle between the protective net and the slope surface, so that the coverage range of the protective net is expanded upward to effectively intercept high-position flying stones; on the contrary, for gentle slope or slope-attached rolling stone scene, slide the auxiliary anchor rod inward to reduce the included angle, so that the protective net is more closely attached to the slope surface, thereby enhancing the blocking effect on low-altitude rolling stones.

[0022] In the anti-extraction structure, two fixed rods are vertically welded to the end wall of the main anchor rod, and the anti-extraction rod is connected to the fixed rod through a hinge point and can rotate 90° around the shaft. When installing the protective net, the anti-extraction rod is rotated from the horizontal storage position to the vertical working position, and the end is clamped into the buckle ring at the edge of the protective net to form a physical limit. When the falling stones impact the protective net, the impact force is transmitted to the fixed rod through the anti-extraction rod, and then dispersed to the slope by the main anchor rod, so as to prevent the net body from being extracted from the anchor rod.

[0023] The main anchor rod adopts a hollow design with an internal anchor cable structure to enhance anchoring stability. When the main anchor rod is inserted into the slope, the internal plug rod retracts into the hollow cavity under the action of the elastic element. At this time, the main anchor rod is initially fixed only by the friction between the rod body and the rock and soil. When encountering soft soil or strong impact load, the operator triggers the anchor cable structure, causing the plug rod to extend from the through hole and embed into the surrounding rock, forming multi-point anchoring.

[0024] The anchor cable structure uses the linkage between the pressing rod and the wedge-shaped inclined surface of the push block to drive the insertion rod to extend from the main anchor rod. When the pressing rod slides along the receiving groove, the wedge-shaped inclined surface of the push block squeezes the end of the insertion rod, overcoming the resistance of the elastic element and forcing the insertion rod to extend from the through hole. After the insertion rod extends, its barbed structure embeds into the rock and soil, while the elastic element provides pre-tightening force to ensure that the insertion rod is in close contact with the rock mass. When operating in reverse, the pressing rod resets, and the elastic element pulls the insertion rod back, facilitating the recovery of the main anchor rod. This structure achieves efficient extension and retraction of the insertion rod through the combined transmission of lever and inclined surface, solving the problem of insufficient anchoring force of traditional anchor rods in complex geological conditions, while also supporting reuse. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the protective device in the embodiments of this application;

[0027] Figure 2 yes Figure 1 Schematic diagram of the main anchor bolt and secondary anchor bolt;

[0028] Figure 3 yes Figure 2 Another structural schematic diagram of the main anchor bolt and secondary anchor bolt;

[0029] Figure 4 yes Figure 3 A schematic diagram of the hollow inner cavity of the main anchor bolt.

[0030] Reference numerals: 1. Main anchor bolt; 11. Slide groove; 12. Threaded hole; 13. Receiving groove; 14. Limiting groove; 2. Secondary anchor bolt; 3. Positioning structure; 31. Sliding block; 32. Threaded locking rod; 4. Protective net; 5. Anti-detachment structure; 51. Fixing rod; 52. Anti-detachment rod; 6. Anchor cable structure; 61. Insertion rod; 62. Elastic element; 63. Pressing rod; 64. Pushing block. Detailed Implementation

[0031] The application will be further described below in conjunction with the accompanying drawings. Figures 1-4 The application will be further described below in conjunction with the accompanying drawings.

[0032] The application discloses a protection device for slope maintenance.

[0033] Referring to Figure 1 and Figure 2 The protection device for slope maintenance comprises a plurality of groups of main anchor rods 1 and a plurality of groups of auxiliary anchor rods 2, each main anchor rod 1 and each auxiliary anchor rod 2 correspond to each other, the auxiliary anchor rod 2 is slidably installed at one end of the main anchor rod 1 and slides along the length direction of the main anchor rod 1, and the main anchor rod 1 is provided with a positioning structure 3 for locking and positioning the sliding of the auxiliary anchor rod 2; the protection device further comprises a protective net 4, the protective net 4 is sequentially arranged on each main anchor rod 1, and the main anchor rod 1 is provided with an anti-disengagement structure 5 for anti-disengagement positioning of the protective net 4.

[0034] According to the scheme, the auxiliary anchor rod 2 is slidably installed on the main anchor rod 1, and the positioning structure 3 is arranged to lock the sliding position of the auxiliary anchor rod 2, so that the relative position of the main anchor rod 1 and the auxiliary anchor rod 2 can be dynamically adjusted according to the slope gradient of the protective net 4, and the included angle between the protective net 4 and the slope surface is changed.

[0035] When the slope gradient is steep and the flying height of the falling stones is large, the operator can slide the auxiliary anchor rod 2 outward along the sliding groove 11 of the main anchor rod 1, so as to increase the included angle between the protective net 4 and the slope surface (for example, from 30° to 60°), at this time, the coverage range of the protective net 4 is expanded upward, and the high-position flying stones are effectively intercepted; on the contrary, for the gentle slope or the slope-attached rolling stone scene, the auxiliary anchor rod 2 is slid inward to reduce the included angle (for example, from 60° to 20°), the protective net 4 is more closely attached to the slope surface, and the blocking effect on the low-altitude rolling stones is enhanced.

[0036] The anti-disengagement structure 5 can always press the edge of the protective net 4 against the main anchor rod 1, so as to prevent the net body from being disengaged due to the impact of the falling stones. The structure realizes stepless adjustment of the protection angle, solves the problem of the interception blind area of the fixed protective net 4 caused by the solidification of the inclination angle, and adapts to the diversified protection requirements of different slope gradients.

[0037] Referring to Figure 2 and Figure 3 The positioning structure 3 comprises a sliding block 31 and a threaded locking rod 32, the peripheral wall of the main anchor rod 1 is provided with a sliding groove 11 along the length direction, the sliding block 31 is rotatably installed at the end of the auxiliary anchor rod 2 and slidably installed in the sliding groove 11, a through hole is formed through the sliding block 31, a plurality of threaded holes 12 penetrating through the sliding groove 11 are formed in the peripheral wall of the main anchor rod 1 along the length direction of the sliding groove 11, and the threaded locking rod 32 is positioned and locked to the sliding block 31 after penetrating through any threaded hole 12 and the through hole.

[0038] The positioning structure 3 converts the linear movement of the secondary anchor rod 2 into the angle adjustment of the protective net 4 through the sliding cooperation of the sliding block 31 and the sliding groove 11. When it is necessary to adjust the inclination angle of the protective net 4, the sliding block 31 is pushed along the sliding groove 11 of the primary anchor rod 1 to drive the secondary anchor rod 2 to move synchronously. At this time, the perforation on the sliding block 31 is aligned with the threaded hole 12 on the peripheral wall of the primary anchor rod 1, and the threaded locking rod 32 is inserted to fix the position of the sliding block 31. For example, when the sliding block 31 slides from the bottom end to the top end of the sliding groove 11, the secondary anchor rod 2 extends outward, so that the included angle between the protective net 4 and the slope surface increases from 20° to 50°, and the interception height is expanded. Reverse sliding reduces the included angle.

[0039] The threaded locking rod 32 passes through the perforation and cooperates with the threaded hole 12 to form a rigid constraint to prevent the sliding block 31 from retreating under the impact of falling rocks. This design realizes accurate angle locking through mechanical linkage, ensures the stability of the protective net 4 under dynamic load, and at the same time simplifies the adjustment operation, which can be completed by a single person, significantly improving the construction efficiency.

[0040] Referring to Figure 1 and Figure 2 , the anti-disengagement structure 5 includes two fixed rods 51 and an anti-disengagement rod 52. The two fixed rods 51 are fixedly installed on the two peripheral walls of the primary anchor rod 1 near the end portion, and the anti-disengagement rod 52 is perpendicular to the fixed rod 51 and is rotatably installed on the peripheral wall of the fixed rod 51.

[0041] In the anti-disengagement structure 5, the two fixed rods 51 are perpendicularly welded to the peripheral wall of the end portion of the primary anchor rod 1, and the anti-disengagement rod 52 is connected to the fixed rod 51 through a hinge joint and can rotate 90° around the shaft. When installing the protective net 4, the anti-disengagement rod 52 is rotated from the horizontal storage position to the vertical working position, and the end portion is clamped into the buckle ring at the edge of the protective net 4 to form physical limiting. When the falling rock impacts the protective net 4, the impact force is transmitted to the fixed rod 51 through the anti-disengagement rod 52, and then dispersed to the slope body by the primary anchor rod 1, so as to avoid the disengagement of the net body from the anchor rod.

[0042] For example, when intercepting large falling rocks, the lever action of the anti-disengagement rod 52 can convert the impact moment into the shearing force of the fixed rod 51, reducing the risk of anchor rod pulling out. Through the synergistic effect of rigid constraint and lever force transmission, the anti-disengagement structure 5 enhances the impact resistance of the protective net 4, and is especially suitable for high-position and high-energy falling rock scenes.

[0043] The primary anchor rod 1 is hollow near the middle, and the inside is provided with an anchor cable structure 6 for improving the stability of the end portion of the primary anchor rod 1. Figure 2 , Figure 3 and Figure 4, anchor cable structure 6 includes plug-in rod 61, elastic element 62, press rod 63 and push block 64, plug-in rod 61 is provided with multiple, the circumferential wall of main anchor rod 1 is provided with multiple through holes along the circumferential direction and is spaced apart, each plug-in rod 61 is slidably installed in the hollow chamber of main anchor rod 1, and the end portion can be penetrated by the corresponding through hole, elastic element 62 is provided with multiple groups corresponding to plug-in rod 61, is sleeved on the outside of corresponding plug-in rod 61, can make the end portion of corresponding plug-in rod 61 be withdrawn from the side wall of main anchor rod 1 into the side wall of main anchor rod 1;

[0044] Referring to Figure 3 and Figure 4 , the side wall of main anchor rod 1 is provided with accommodating groove 13 and limiting groove 14, one end of accommodating groove 13 and one end of limiting groove 14 are communicated, and the extension direction of accommodating groove 13 and the extension direction of limiting groove 14 are perpendicular to each other, one end of press rod 63 is slidably installed in accommodating groove 13, the other end is located in the hollow chamber of main anchor rod 1 and is fixedly connected with push block 64, the side wall of push block 64 is wedge-shaped inclined surface, which can push the end of each plug-in rod 61, so that the end of each plug-in rod 61 away from push block 64 is stretched out of main anchor rod 1 from the corresponding through hole.

[0045] Main anchor rod 1 is designed as hollow, and anchor cable structure 6 is arranged inside to enhance anchoring stability. When main anchor rod 1 is inserted into the slope body, the plug-in rod 61 inside is contracted in the hollow chamber under the action of elastic element 62, at this time, main anchor rod 1 is only preliminarily fixed by relying on the friction force between the rod body and the rock-soil. When encountering soft soil or strong impact load, the operator triggers anchor cable structure 6, so that plug-in rod 61 is stretched out of the through hole and embedded in the surrounding rock mass, forming multi-point anchoring. For example, plug-in rod 61 can be barbed, which is engaged with the rock-soil after being penetrated, and the pullout resistance is improved by 2-3 times. The hollow structure also allows the injection of grouting material, further filling the gap between the rod body and the hole wall, and enhancing the overall anchoring strength. This design adapts to different geological conditions (such as broken rock mass and loose soil layer) through a dynamic anchoring mechanism, significantly improving the bearing capacity of main anchor rod 1.

[0046] Anchor cable structure 6 drives plug-in rod 61 to stretch out of main anchor rod 1 through the linkage of press rod 63 and wedge-shaped inclined surface of push block 64. When press rod 63 slides along accommodating groove 13, the wedge-shaped inclined surface of push block 64 presses the end of plug-in rod 61, overcomes the resistance of elastic element 62, and forces plug-in rod 61 to stretch out of the through hole. For example, when press rod 63 moves 10 mm, the inclined surface of push block 64 can push plug-in rod 61 out by 30 mm, forming a mechanical gain. After plug-in rod 61 is stretched out, its barbed structure is embedded in the rock-soil, and elastic element 62 provides pre-tightening force to ensure that plug-in rod 61 is in close contact with the rock mass. When operated in reverse, press rod 63 is reset, and elastic element 62 pulls plug-in rod 61 to retract, which is convenient for the recovery of main anchor rod 1. This structure realizes the efficient extension and retraction of plug-in rod 61 through the composite transmission of lever and inclined surface, solves the problem of insufficient anchoring force of traditional anchor rods in complex geology, and supports repeated use.

[0047] Further, the bottom of the main anchor rod 1 and the secondary anchor rod 2 is provided with a pointed end, which can reduce the end resistance when inserted into the slope body. For example, the pointed end is 30°, which can concentrate the insertion force to penetrate hard rock or dense soil layer, and the insertion efficiency is improved by 40% compared with the flat end anchor rod. The pointed end structure also guides the anchor rod to penetrate the slope body along the preset path, avoiding the anchoring failure caused by deviation. For loose accumulation slope, the pointed end design can penetrate the surface floating soil and reach the stable rock layer, ensuring the consistency of anchoring depth. This design optimizes the end shape of the anchor rod, reduces the construction difficulty, and is suitable for various geological conditions.

[0048] The implementation principle of the protection device for slope maintenance according to an embodiment of the present application is as follows: the secondary anchor rod 2 is slidably installed on the main anchor rod 1, and the positioning structure 3 is arranged to lock the sliding position of the secondary anchor rod 2, so that the protection net 4 can dynamically adjust the relative position of the main anchor rod 1 and the secondary anchor rod 2 according to the slope gradient, thereby changing the included angle between the protection net 4 and the slope surface.

[0049] When the slope is steep and the height of flying rocks is large, the operator can slide the secondary anchor rod 2 outward along the sliding groove 11 of the main anchor rod 1 to increase the included angle between the protection net 4 and the slope surface, at this time, the coverage range of the protection net 4 is expanded upward, effectively intercepting high flying stones; on the contrary, for the gentle slope or the slope rolling stone scene, the secondary anchor rod 2 is slid inward to reduce the included angle, and the protection net 4 is closely attached to the slope surface, thereby enhancing the blocking effect of low altitude rolling stones.

[0050] The above are optional embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A protective device for slope maintenance, characterized in that: It includes multiple sets of main anchor rods (1) and multiple sets of secondary anchor rods (2), each of the main anchor rods (1) and each of the secondary anchor rods (2) corresponds to one another. One end of the secondary anchor rod (2) is slidably installed on the main anchor rod (1) and slides along the length direction of the main anchor rod (1). The main anchor rod (1) is provided with a positioning structure (3) for locking and positioning the sliding of the secondary anchor rod (2). It also includes a protective net (4), which is sequentially arranged on each of the main anchor rods (1), and the main anchor rods (1) are provided with an anti-detachment structure (5) for positioning the protective net (4) to prevent it from detaching.

2. The protective device for slope maintenance according to claim 1, characterized in that: The positioning structure (3) includes a slider (31) and a threaded locking rod (32). The main anchor rod (1) has a groove (11) along its length on its peripheral wall. The slider (31) is rotatably mounted on the end of the secondary anchor rod (2) and slidably mounted in the groove (11). A through hole is provided on the slider (31). Multiple threaded holes (12) are provided on the peripheral wall of the main anchor rod (1) along the length of the groove (11). The threaded locking rod (32) locks the slider (31) after passing through any of the threaded holes (12) and the through hole.

3. The protective device for slope maintenance according to claim 1, characterized in that: The anti-detachment structure (5) includes a fixing rod (51) and an anti-detachment rod (52). There are two fixing rods (51), which are respectively fixedly installed on two peripheral walls near the end of the main anchor rod (1). The anti-detachment rod (52) is perpendicular to the fixing rod (51), and one end is rotatably installed on the peripheral wall of the fixing rod (51).

4. A protective device for slope maintenance according to claim 1, characterized in that: The main anchor rod (1) is located near the hollow center, and an anchor cable structure (6) is provided inside to improve the stability of the insertion at the end of the main anchor rod (1).

5. A protective device for slope maintenance according to claim 4, characterized in that: The anchor structure (6) includes a plug rod (61), an elastic element (62), a pressing rod (63), and a pushing block (64). There are multiple plug rods (61). Multiple through holes are spaced apart along the circumferential direction on the peripheral wall of the main anchor rod (1). Each plug rod (61) is slidably installed in the hollow cavity of the main anchor rod (1), and its end can be passed through the corresponding through hole. There are multiple sets of elastic elements (62) corresponding to the plug rods (61), which are sleeved on the outside of the corresponding plug rods (61) so that the end of the corresponding plug rod (61) can be retracted from the outside of the main anchor rod (1) into the side wall of the main anchor rod (1). The main anchor rod (1) has a receiving groove (13) and a limiting groove (14) on its side wall. One end of the receiving groove (13) and one end of the limiting groove (14) are connected. The extension direction of the receiving groove (13) and the extension direction of the limiting groove (14) are perpendicular to each other. One end of the pressing rod (63) is slidably installed in the receiving groove (13), and the other end is located in the hollow cavity of the main anchor rod (1) and is fixedly connected to the pushing block (64). The side wall of the pushing block (64) is wedge-shaped and can push against the ends of each of the plug rods (61), so that the end of each plug rod (61) away from the pushing block (64) extends out of the main anchor rod (1) through the corresponding through hole.

6. A protective device for slope maintenance according to claim 1, characterized in that: The bottom of the main anchor (1) and the secondary anchor (2) are set with pointed ends.

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