A corrugated steel pipe anti-slip device for steep slope terrain

Abstract

The present invention discloses a corrugated steel pipe anti-slip device for steep slope terrain, belonging to the technical field of pipe culvert fixing. It comprises a corrugated steel pipe, and an anti-slip anchor rod group is arranged on at least one circumference of the corrugated steel pipe, and each anti-slip anchor rod group comprises an anchor rod connected to the spandrels and axils on both sides of the corrugated steel pipe, the two anchor rods at the spandrels are symmetrically arranged and the ends are outwardly turned, and the two anchor rods at the axils are symmetrically arranged and the ends are cohesive; the end of each anchor rod is fixed to the rock and soil of the steep slope at the bottom of the corrugated steel pipe through an anchor body. The present invention adopts the anchor rod principle to achieve anti-slip of the corrugated steel pipe culvert, and has the advantages of fast construction and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of pipe culvert fixing, in particular to an anti-slip device for corrugated steel pipes used in steep slope terrain. Background Art

[0002] As an important part of highway engineering, culverts are important structures in highway drainage systems. Their function is to quickly remove surface water along the highway and ensure the safety of the roadbed. The flow slope of the culvert is classified according to the hydraulic properties. When it is greater than the critical slope, it is a steep slope, otherwise it is a gentle slope.

[0003] Corrugated steel pipes have the advantages of low foundation bearing capacity, convenient and fast construction, good economy, low carbon and environmental protection, etc., so they have been more and more widely used in highway bridge and culvert design in recent years. In mountainous areas, the slope of natural rivers is generally greater than the critical slope of the designed culvert, which leads to the problem of large longitudinal slope at the bottom of corrugated steel pipes.

[0004] Yin Hui from China Power Construction Group Kunming Survey and Design Institute Co., Ltd. and Zhong Pengyun from Yunnan Traffic Safety Research Center of Yunnan Transportation Research Institute Co., Ltd. conducted some research on the application of corrugated steel pipe culverts in steep slopes, and published a paper titled "Research on Anti-slip Design of Corrugated Steel Pipe Culverts on Mountain Highways" in Engineering Technology in 2018. This paper conducted a relatively detailed study on the design and construction of anti-slip piers for corrugated steel pipe culverts located on steep slopes in mountainous areas, and explored the application of corrugated steel pipe culverts on steep slopes in mountainous areas.

[0005] However, the use of anti-slip piers for corrugated steel pipes on steep slopes in mountainous areas requires certain conditions. When the terrain slope reaches a certain value, not only will the anti-slip piers themselves have stability problems on the steep slopes, but the construction of the anti-slip piers will also cause certain damage to the slopes, and the cost is relatively high. Summary of the invention

[0006] The purpose of the present invention is to overcome the above shortcomings and provide a corrugated steel pipe anti-slip device for steep slope terrain, which adopts the anchor rod principle to achieve the anti-slip of the corrugated steel pipe and has the advantages of fast construction and low cost.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A corrugated steel pipe anti-skid device for steep slope terrain comprises a corrugated steel pipe; an anti-skid anchor rod group is arranged on at least one circumference of the corrugated steel pipe, each anti-skid anchor rod group comprises an anchor rod connected to the spandrels and axils on both sides of the corrugated steel pipe, the two anchor rods at the spandrels are symmetrically arranged with their ends turned outward, and the two anchor rods at the axils are symmetrically arranged with their ends turned inward; the end of each anchor rod is fixed in the rock and soil of the steep slope at the bottom of the corrugated steel pipe through an anchor body.

[0009] Furthermore, the axils and the spandrels are symmetrical in position.

[0010] Furthermore, the anchor rod includes a connecting ring, a connecting rod, a tensioner and an anchor rod, the connecting ring is welded to the front end of the connecting rod, both ends of the tensioner have screw holes, the end of the connecting rod and the front end of the anchor rod have threaded sections, the end of the connecting rod and the front end of the anchor rod are respectively threadedly connected to the screw holes at both ends of the tensioner, and tensioner tightening nuts are also provided on the connecting rod threaded sections and the anchor rod threaded sections at both ends of the tensioner.

[0011] Furthermore, an arc-shaped reinforced corrugated steel plate is provided at each position on the corrugated steel pipe connected to the anchor rod, and the arc-shaped reinforced corrugated steel plate covers the crest of the corrugated steel pipe at the connection position and the troughs on both sides of the crest. The arc-shaped reinforced corrugated steel plate is connected to the corrugated steel pipe through three bolts arranged on the crest, and the screw rod of each bolt passes through the pipe wall of the corrugated steel pipe and the arc-shaped reinforced corrugated steel plate in turn. The connecting ring of the anchor rod is sleeved on the end screw rod of the middle bolt and fixed by a locking nut.

[0012] Furthermore, the tensioner comprises two rectangular end steel plates and two rectangular side steel plates, the four steel plates are welded together to form a rectangular frame, and the screw holes at both ends of the tensioner are respectively threaded holes at the centers of the two rectangular end steel plates.

[0013] Furthermore, a plane passing through the axis of the corrugated steel pipe and perpendicular to the horizontal plane is used as a reference plane, and an angle between the projection of the anchor rod in the reference plane and the horizontal plane is greater than an angle between the axis of the corrugated steel pipe and the horizontal plane.

[0014] Furthermore, the projection of the anchor rod at the spandrel in the reference plane is parallel to the projection of the anchor rod at the axil in the reference plane.

[0015] Furthermore, the corrugated steel pipe is a corrugated steel channel or a corrugated steel culvert.

[0016] The beneficial effects of the present invention compared to the prior art are:

[0017] 1. The present invention achieves force balance of the corrugated steel pipe through the tension of the anchor rod, meets the need for anti-slip of the corrugated steel pipe, has the characteristics of simple structure, few components, easy processing, low cost, etc., and is easy to promote and apply.

[0018] 2. The present invention can adapt to various steep terrains by adjusting the tension of the anchor rods, the setting position and the number of anchor rod groups, thus avoiding the problem of insufficient stability of anti-slip facilities such as anti-slip piers and anti-slip keys at steep slopes and damage to the slope surface caused by construction, and has higher safety and reliability.

[0019] 3. When the corrugated steel pipe is located on a steep slope and the present invention is adopted, the length of the corrugated steel pipe can be effectively reduced, thereby reducing the construction cost.

[0020] 4. When the corrugated steel pipe is located on a steep slope and there is poor engineering geology, the present invention can make full use of the strong overall structural characteristics of the corrugated steel pipe structure itself, and appropriately increase the number of positions or length to simultaneously meet the needs of anti-slip and slope reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the anti-slip structure in an embodiment of the present invention.

[0022] Figure 2 for Figure 1 AA view of the .

[0023] Figure 3 for Figure 2 A partial enlarged view of part A.

[0024] Figure 4 for Figure 3 BB view.

[0025] Figure 5 for Figure 4 Schematic diagram of the structure of the medium-reinforced corrugated steel plate.

[0026] Figure 6 for Figure 1 Schematic diagram of the structure of the connecting ring and the connecting rod.

[0027] Figure 7 for Figure 1 Schematic diagram of the structure of the tensioner.

[0028] Figure 8 for Figure 1 Schematic diagram of the structure of the middle loose nut.

[0029] Fig. 9 for Figure 1 Schematic diagram of the structure of the anchor rod in the middle spandrel anchor.

[0030] Fig.10 for Figure 1 Schematic diagram of the structure of the anchor rod in the middle arch anchor.

[0031] Fig.11 Schematic diagram of the anchor body.

[0032] Fig.12 It is a schematic diagram of the force analysis of the anti-slip structure in an embodiment of the present invention.

[0033] Fig.13 Schematic diagram of the force analysis of the anchor body.

[0034] In the figure:

[0035] D-diameter of corrugated steel pipe.

[0036] α1-Angle between the axis of the corrugated steel pipe and the horizontal plane

[0037] α2- Angle between the projection of the anchor in the reference plane and the horizontal plane

[0038] 1-Curved reinforced corrugated steel plate

[0039] 2- round steel connecting anchor rod at the first end

[0040] 2-1-Round steel connecting ring

[0041] 2-2-Round steel connecting rod

[0042] 2-3-Round steel thread segment

[0043] L1- Length of round steel thread section

[0044] d- round steel diameter

[0045] 3-Rectangular frame tensioner

[0046] 3-1 Rectangular frame end steel plate

[0047] 3-2 Rectangular frame side steel plate

[0048] W1-net width inside the rectangular frame tensioner

[0049] L2-net length inside the rectangular frame tensioner

[0050] 4-Tensioner loose nut

[0051] 5- Anchor rod at the upper end of the corrugated steel pipe

[0052] 5-1 Round steel threaded section

[0053] 5-2 Round steel segment

[0054] L2- length of the round steel section of the anchor rod at the upper end of the corrugated steel pipe

[0055] 6- Anchor rod at the lower end of the corrugated steel pipe

[0056] 6-1 Round steel threaded section

[0057] 6-2 Round steel segment

[0058] L3- length of the round steel section of the anchor rod at the lower end of the corrugated steel pipe

[0059] 7-Anchor

[0060] L4- Anchor rod anchor length

[0061] 8-Corrugated steel pipe

[0062] 9-Geotechnical

[0063] 10, 11-High strength bolts

[0064] 12-Lock nut

[0065] 13, 14-Concave and convex gaskets matching high-strength bolts and arc-shaped reinforced corrugated steel plates

[0066] q-uniformly distributed vehicle load

[0067] G- The sum of the weight of vehicles, fill, corrugated steel pipes and water flowing in the pipes

[0068] F-slope angle α1, the sliding force decomposed by G

[0069] When N-slope angle α1, the pressure component decomposed by G

[0070] μ- Friction coefficient between corrugated steel pipe and surrounding soil

[0071] f-corrugated steel pipe anti-slip friction, f = μN

[0072] T-Anchor Rod Reverse Tension

[0073] When N1-angle α1+α1, the pressure component decomposed by T

[0074] When f1-angle α1+α1, the anti-slip force decomposed by T

[0075] f2-the anti-slip friction force of the corrugated steel pipe generated by N1, f2=μN1

[0076] T1- Bond strength between anchor rod and anchor mortar

[0077] T2-Friction between mortar and rock soil. DETAILED DESCRIPTION

[0078] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0079] like Figures 1 to 11 As shown, a corrugated steel pipe anti-skid device for steep slope terrain includes a corrugated steel pipe 8; an anti-skid anchor rod group is provided on at least one circumference of the corrugated steel pipe 8, each anti-skid anchor rod group includes an anchor rod connected to the arch shoulders and arch arms on both sides of the corrugated steel pipe 8, the two anchor rods at the arch shoulders are symmetrically arranged with the ends turned outward, and the two anchor rods at the arch arms are symmetrically arranged with the ends cohesive; the end of each anchor rod is fixed to the rock and soil 9 on the steep slope at the bottom of the corrugated steel pipe through an anchor body 7.

[0080] The anchor rod comprises a round steel connecting ring 2-1, a round steel connecting rod 2-2, a rectangular frame tensioner 3, an anchor rod 5 at the upper end of a corrugated steel pipe, and an anchor rod 6 at the lower end of a corrugated steel pipe. The round steel connecting ring 2-1 is welded to the front end of the round steel connecting rod 2-2. The rectangular frame tensioner 3 comprises two rectangular end face steel plates 3-1 and two rectangular side face steel plates 3-2. The four steel plates are welded together to form a rectangular frame. There is a threaded hole at the center of each of the two rectangular end face steel plates. The end of the round steel connecting rod 2-2 has a round steel threaded section 2-3. The front ends of the anchor rods 5 and 6 both have round steel threaded sections 5-1 and 6-1. The round steel threaded sections 5-1 and 6-1 are followed by round steel sections 5-2 and 6-2. The end of the round steel connecting rod and the front end of the anchor rod are respectively threadedly connected to the threaded holes at the two ends of the tensioner. The threaded sections at the two ends of the tensioner are also provided with tensioner loose nuts 4.

[0081] An arc-shaped reinforced corrugated steel plate 1 is provided at each position on the corrugated steel pipe 8 connected to the anchor rod. The arc-shaped reinforced corrugated steel plate 1 covers the crest of the corrugated steel pipe at the connection position and the troughs on both sides of the crest. The arc-shaped reinforced corrugated steel plate 1 is connected to the corrugated steel pipe through three bolts 10 and 11 arranged on the crest. The screw of each bolt passes through the pipe wall of the corrugated steel pipe and the reinforced corrugated steel plate in turn. The round steel connecting ring 2-1 of the anchor rod is sleeved on the end screw of the middle bolt and fixed by a locking nut 12.

[0082] Furthermore, the axils and the spandrels are symmetrical in position.

[0083] Furthermore, taking a plane passing through the axis of the corrugated steel pipe and perpendicular to the horizontal plane as a reference plane, an angle α2 between the projection of the anchor rod in the reference plane and the horizontal plane is greater than an angle α1 between the axis of the corrugated steel pipe and the horizontal plane.

[0084] Furthermore, the projection of the anchor rod at the spandrel in the reference plane is parallel to the projection of the anchor rod at the axil in the reference plane.

[0085] The functions of each part of the structure are as follows:

[0086] Arc-shaped reinforced corrugated steel plate 1: This component is a rectangular arc-shaped corrugated plate with three holes drilled at the crest. The arc-shaped reinforced corrugated steel plate 1, the corrugated steel pipe 8 and the head round steel connecting anchor rod 2 are connected together by high-strength bolts 10, 11, nuts 12 and convex and concave washers 13, 14. The head round steel connecting anchor rod 2 reduces the internal stress of the corrugated steel pipe 8 through three-point connection, which plays a role of local reinforcement.

[0087] Round steel connecting anchor rod 2 at the head end: This component is composed of a round steel connecting ring 2-1, a round steel connecting rod 2-2 and a round steel threaded section 2-3, wherein the round steel connecting ring 2-1 is connected to the round steel connecting rod 2-2 by welding. The round steel connecting ring 2-1 is composed of a round steel ring and a straight section. The hole diameter of the round steel ring is larger than the nominal diameter of the high-strength bolt 11, and can be directly inserted and tightened by the locking nut 12. The round steel threaded section 2-3 is connected to the rectangular frame tensioner 3 by threading and can be adjusted and tightened by the tensioner loosening nut 4.

[0088] Rectangular frame tensioner 3: The tensioner is composed of two rectangular end steel plates 3-1 and two rectangular side steel plates 3-2, wherein the rectangular end steel plate 3-1 is provided with a threaded hole at its center. The four steel plates are welded to form a rectangular frame structure and can withstand the maximum anchor rod design tension. The two ends of the tensioner are respectively connected to the head end round steel connection anchor rod 2, the corrugated steel pipe upper end anchor rod 5 or the corrugated steel pipe lower end anchor rod 6 by threaded connection, and can be adjusted and tightened by the tensioner loosening nut 4.

[0089] Tensioner loosening nut 4: This nut is matched with the round steel threaded section 2-3 of the head end round steel connecting anchor rod 2 and the round steel threaded section 5-1 of the upper end anchor rod 5 of the corrugated steel pipe or the round steel threaded section 6-1 of the lower end anchor rod 6 of the corrugated steel pipe, and can adjust the tightness and tighten the head end round steel connecting anchor rod 2, the upper end anchor rod 5 of the corrugated steel pipe or the lower end anchor rod 6 of the corrugated steel pipe.

[0090] Anchor rod 5 at the upper end of the corrugated steel pipe: This component is composed of a round steel threaded section 5-1 and a round steel section 5-2. The round steel threaded section 5-1 is connected to the rectangular frame tensioner 3 by threading and can be adjusted and tightened by the tensioner loose nut 4. The end of the round steel section 5-2 enters the anchor body 7, and the anchor rod 5 at the upper end of the corrugated steel pipe is connected to the anchor body 7 by the bond strength of the round steel and the surrounding mortar.

[0091] Anchor rod 6 at the lower end of the corrugated steel pipe: This component is composed of a round steel threaded section 6-1 and a round steel section 6-2. The round steel threaded section 6-1 is connected to the rectangular frame tensioner 3 by threading and can be adjusted and tightened by the tensioner loose nut 4. The end of the round steel section 6-2 enters the anchor body 7, and the anchor rod 6 at the lower end of the corrugated steel pipe is connected to the anchor body 7 by the bond strength of the round steel and the surrounding mortar.

[0092] Anchor body 7: The end L4 of the round steel section 5-2 of the upper end anchor rod 5 of the corrugated steel pipe enters the anchor body 7, and the upper end anchor rod 5 of the corrugated steel pipe is connected to the anchor body 7 through the bond strength between the round steel and the surrounding mortar. The connection principle of the lower end anchor rod 6 of the corrugated steel pipe and the anchor body 7 is the same. The periphery of the anchor body 7 is connected to the rock and soil 9 through bonding force or friction force.

[0093] Corrugated steel pipe 8: The structural body assembled or assembled by corrugated steel plates.

[0094] Rock and soil 9: It is a general term for rock and soil, which plays the role of anchoring the anchor body 7.

[0095] High-strength bolt: plays a connecting role, and the length of high-strength bolt 11 is greater than the length of high-strength bolt 10.

[0096] Locking nut 12: plays a tightening role.

[0097] Concave and convex gaskets 13 and 14 are matched with high-strength bolts and arc-shaped reinforced corrugated steel plates to increase the contact area, increase friction and buffering force, and prevent the bolts from loosening.

[0098] Reference Fig.12 and 13 , the anti-slip principle of this structure is as follows:

[0099] When the corrugated steel pipe is located on a steep slope, under the action of the sum of the weights G of vehicles, fill, corrugated steel pipes and water flowing in the pipe, it is decomposed into a sliding force F and a pressure force N perpendicular to the slope along the slope direction, and the generated anti-slip friction force f of the corrugated steel pipe is Nμ. When f≥F, the corrugated steel pipe does not slip and is in a stable state. Otherwise, the corrugated steel pipe slips and is in an unstable state. In order to prevent the corrugated steel pipe from slipping, one or more anti-slip devices for corrugated steel pipes can be set at appropriate positions behind the sliding direction of the pipe to prevent the corrugated steel pipe from slipping. The device is connected to the head end of the anchor rod through four anti-tension points set symmetrically at the axils and spandrels on both sides of the corrugated steel pipe, and is tightened by a rectangular frame tensioner and a loose nut set in the middle of the anchor rod. Once the corrugated steel pipe slips, a passive anti-tension force T (the tension is opposite to the direction of the sliding force) will be generated to balance it with the remaining sliding force generated by the corrugated steel pipe. The end of the anchor rod is connected to the anchor body to transfer the counter-tension force T to the rock and soil, so that the corrugated steel pipe can be balanced as a whole.

[0100] The anchor body plays a key role in transferring the anti-tension force T of the anchor rod to the rock and soil. The anti-tension force T of the anchor rod is transferred to the mortar through the bond strength between the rod body and the surrounding anchor mortar, and then the anti-tension force T is transferred to the rock and soil outside the anchor body through the bonding force (or friction resistance) around the anchor body drilling hole.

[0101] Here are a few more specific examples:

[0102] Case 1: A corrugated steel pipe 8 with a diameter of 1500 mm is located on a terrain with a slope of 20% (α1 = 11.31°) and is fixed with an anti-slip structure. The diameter of the round steel anchor rod in the anti-slip structure is 25 mm, the anchor rod drilling angle is 15°, and the length of the anchor body 7 is 6000 mm.

[0103] Case 2: A corrugated steel pipe 8 with a diameter of 6000 mm is located on a terrain with a slope of 25% (α1 = 14.03°) and is fixed with an anti-slip structure. The diameter of the round steel anchor rod in the anti-slip structure is 28 mm, the anchor rod drilling angle is 18°, and the length of the anchor body 7 is 8000 mm.

[0104] Case 3: A corrugated steel pipe 8 with a diameter of 10000 mm is located on a terrain with a slope of 30% (α1 = 16.7°) and is fixed with an anti-slip structure. The diameter of the round steel anchor rod in the anti-slip structure is 30 mm, the anchor rod drilling angle is 20°, and the length of the anchor body 7 is 10000 mm.

[0105] The anti-slip structure applies a passive anti-tension force in the opposite direction of the downward force through four anti-tension points symmetrically arranged at the axils and spandrels on both sides of the corrugated steel pipe, thereby preventing the corrugated steel pipe from slipping. Two of the four anti-tension points are arranged symmetrically on each side, respectively located at appropriate positions of the axils and spandrels of the corrugated steel pipe and symmetrically, so as to achieve uniform force on all sides of the corrugated steel pipe structure, reduce pipe deformation, and ensure service life. After the anchor rod is assembled on site and the corrugated steel pipe is tightened, the corrugated steel pipe begins to be backfilled, rolled and put into use. After that, once the corrugated steel pipe slips, since one end of the anchor rod is fastened to the corrugated steel pipe and the other end is locked by the anchor body and rock and soil, a passive anti-tension force in the sliding direction is bound to be generated, and the downward force of the corrugated steel pipe will reach a stable state under the balance of this force.

[0106] When the corrugated steel pipe is located in steep terrain and areas with poor geology, the needs of anti-slip and slope reinforcement can be met by adjusting the anchor length L4 of the round steel section end of the anchor rod at the upper end of the corrugated steel pipe or the lower end of the corrugated steel pipe entering the anchor body, as well as the position and number of the anchor rods.

[0107] The arc-shaped reinforced corrugated steel plate is provided with three drill holes at the wave crest. The tension of the anchor rod on the corrugated steel pipe is reduced by the three-point connection between the arc-shaped reinforced corrugated steel plate and the corrugated steel pipe, thereby playing a role of local reinforcement.

[0108] The round steel threaded section of the round steel connecting anchor rod is connected to the rectangular frame tensioner by threaded connection, and can be adjusted and tightened by the tensioner tightening nut.

[0109] The width of W1 in the rectangular frame tensioner should meet the needs of tightening the tensioner's loose nut, and the length of L2 should be greater than 2 times of L1.

[0110] The round steel section of the anchor rod at the upper end of the corrugated steel pipe or the anchor rod at the lower end of the corrugated steel pipe enters the anchor body, and the round steel section is connected to the anchor body through the bonding force between the round steel and the surrounding mortar. L3 should be greater than L2.

[0111] In summary, the present invention achieves force balance of the corrugated steel pipe through the tension of the anchor rod, meets the need for anti-slip of the corrugated steel pipe, has the characteristics of simple structure, few components, easy processing, low cost, etc., and is an important improvement on the prior art.

Claims

1. A corrugated steel pipe anti-slip device for steep slope terrain, comprising a corrugated steel pipe; characterized in that: An anti-slip anchor rod group is provided on at least one circumference of the corrugated steel pipe, each anti-slip anchor rod group includes an anchor rod connected to the spandrels and axils on both sides of the corrugated steel pipe, the two anchor rods at the spandrels are symmetrically arranged with their ends turned outward, and the two anchor rods at the axils are symmetrically arranged with their ends turned inward; the end of each anchor rod is fixed in the rock and soil of the steep slope at the bottom of the corrugated steel pipe through an anchor body; The axils and the spandrels are symmetrical in position; The anchor rod comprises a connecting ring, a connecting rod, a tensioner and an anchor rod, wherein the connecting ring is welded to the front end of the connecting rod, both ends of the tensioner are provided with screw holes, the end of the connecting rod and the front end of the anchor rod are provided with threaded sections, the end of the connecting rod and the front end of the anchor rod are respectively threadedly connected to the screw holes at both ends of the tensioner, and the threaded sections of the connecting rod and the threaded sections of the anchor rod at both ends of the tensioner are also provided with tensioner loose nuts; A curved reinforced corrugated steel plate is provided at each position on the corrugated steel pipe connected to the anchor rod. The curved reinforced corrugated steel plate covers the crest of the corrugated steel pipe at the connection position and the troughs on both sides of the crest. The curved reinforced corrugated steel plate is connected to the corrugated steel pipe by three bolts arranged on the crest. The screw rod of each bolt passes through the pipe wall of the corrugated steel pipe and the curved reinforced corrugated steel plate in turn. The connecting ring of the anchor rod is sleeved on the end screw rod of the middle bolt and fixed by a locking nut.

2. The anti-slip device for corrugated steel pipes for steep slopes according to claim 1, characterized in that: The tensioner comprises two rectangular end steel plates and two rectangular side steel plates. The four steel plates are welded together to form a rectangular frame. The screw holes at both ends of the tensioner are respectively threaded holes at the centers of the two rectangular end steel plates.

3. The anti-slip device for corrugated steel pipes used in steep slope terrain according to claim 1, characterized in that: A plane passing through the axis of the corrugated steel pipe and perpendicular to the horizontal plane is used as a reference plane, and the angle between the projection of the anchor rod in the reference plane and the horizontal plane is greater than the angle between the axis of the corrugated steel pipe and the horizontal plane.

4. The anti-slip device for corrugated steel pipes for steep slopes according to claim 3, characterized in that: The projection of the anchor rod at the spandrel in the reference plane is parallel to the projection of the anchor rod at the axil in the reference plane.

5. The anti-slip device for corrugated steel pipes used in steep slope terrain according to claim 1, characterized in that: The corrugated steel pipeline is a corrugated steel channel or a corrugated steel culvert.

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