Anchor rod for fixing vegetation blanket on debris flow slope and use method thereof

Abstract

The present application provides an anchor member and a method of use for fixing a vegetation blanket on a debris flow slope, belonging to the technical field of vegetation blankets. The anchor member includes an anchor rod, a first limiting portion and a first wedge assembly, wherein the anchor rod has a lower end and an upper end in the length direction; the first limiting portion is arranged at the lower end, and the distance between the first limiting portion and the center of the anchor rod gradually increases from the upper end to the lower end, so as to form an inclined first limiting surface on the side of the first limiting portion; the first wedge assembly includes a plurality of first wedge portions, and the plurality of first wedge portions are arranged around the periphery of the first limiting portion; the first wedge portion has a first wedge surface that contacts and cooperates with the first limiting surface; when the positions of the plurality of first wedge portions are fixed, the plurality of first wedge portions are limitedly cooperated with the first limiting surface of the first limiting portion to prevent the anchor rod from moving from the lower end to the upper end relative to the first wedge portion. An anchor member with this structure can improve the fixing effect of the vegetation blanket on the debris flow slope.

Description

Technical Field

[0001] The present application relates to the technical field of vegetation blankets, and in particular to an anchor member for fixing vegetation blankets on debris flow slopes and a method of using the anchor member. Background Art

[0002] Debris flow slopes usually face serious soil erosion problems. Laying vegetation blankets on debris flow slopes can effectively slow down rainwater erosion and reduce soil erosion. Existing slope control vegetation blankets are generally not well fixed on slopes with complex terrain, so vegetation blanket fixings are needed. However, the existing fixings for fixing slope control vegetation blankets are usually bare rod structures, which have little friction with the soil and cannot be well fixed on slopes with complex terrain, especially on debris flow slopes. Existing anchor rods have the problem of poor anchoring performance for vegetation blankets. Summary of the invention

[0003] The embodiments of the present application provide an anchor member for fixing a vegetation blanket on a debris flow slope and a method of use, which can improve the fixing effect of the vegetation blanket on the debris flow slope.

[0004] In the first aspect, an embodiment of the present application provides an anchor member for fixing a vegetation blanket on a debris flow slope, the anchor member is used to fix the vegetation blanket, the anchor member includes an anchor rod, a first limiting portion and a first wedge assembly, the anchor rod has a lower end and an upper end in the length direction; the first limiting portion is arranged at the lower end, and the distance between the first limiting portion and the center of the anchor rod gradually increases from the upper end to the lower end, so as to form an inclined first limiting surface on the side of the first limiting portion; the first wedge assembly includes a plurality of first wedge portions, and the plurality of first wedge portions are arranged around the circumference of the first limiting portion; the first wedge portion has a first wedge surface that contacts and cooperates with the first limiting surface; wherein, when the positions of the plurality of first wedge portions are fixed, the plurality of first wedge portions are limitedly cooperated with the first limiting surface of the first limiting portion to prevent the anchor rod from moving from the lower end to the upper end relative to the first wedge portion.

[0005] In this solution, a first limiting portion is provided at the lower end of the anchor rod, and the distance between the first limiting portion and the center of the anchor rod gradually increases, so that an inclined first limiting surface is formed on the side of the first limiting portion at the lower end of the anchor rod. The first wedge assembly includes a plurality of first wedges, and the plurality of first wedges are arranged around the periphery of the first limiting portion. After the first wedge assembly and the anchor rod are inserted into the soil in a relatively fixed manner, the plurality of first wedges of the first wedge assembly are located on the outer periphery of the first limiting portion, and the plurality of first wedges are limitedly matched with each first limiting surface of the first limiting portion. When the anchor rod has a tendency to move outward, since the soil provides resistance and friction to the plurality of first wedges, due to the relationship between the action force and the reaction force, the anchor rod is anchored by the combined force of the extrusion force and friction force of the plurality of first wedges on the first limiting portion of the anchor rod. And as the upward displacement of the anchor rod increases, the anchoring force gradually increases as the rod moves outward, thereby effectively anchoring the anchor rod, and the anchor rod is not easily pulled out, thereby improving the anchoring effect on the vegetation blanket and making the installation stability of the vegetation blanket higher.

[0006] In some embodiments, the anchor rod is formed by stacking at least two sheet-shaped bamboo rods, and the cross-section of the anchor rod is rectangular.

[0007] In the above technical solution, the anchor rod is formed by stacking a plurality of sheet-shaped bamboo rods, which makes it easy to obtain materials and has a low cost, thus facilitating the production and promotion of the anchor rod.

[0008] In some embodiments, the cross-sectional shape of the first limiting portion is an isosceles trapezoid, the first limiting portion has four first limiting surfaces distributed in the circumferential direction, and the number of the first wedge-shaped portions is set to at least two.

[0009] In the above technical solution, the cross-sectional shape of the first limiting part is an isosceles trapezoid, and the first limiting part has four first limiting surfaces distributed in the circumferential direction, that is, the shape of the first limiting part is a quadrangular pyramid. In this way, the first limiting part cooperates with at least two first wedge-shaped parts, so that the multiple first wedge-shaped parts cooperate together, and the at least two first limiting surfaces of the first limiting part are respectively limited and cooperated, so that there are multiple limiting surfaces between the first limiting part and the first wedge-shaped component, so that the circumferential pull-out resistance of the first limiting part at the lower end of the anchor rod is more uniform, the anchor rod will not have weak points, and the anchor rod is not prone to local tipping or tilting, which plays an effective anchoring role for the anchor rod, thereby improving the anchoring effect on the vegetation blanket.

[0010] In some embodiments, the anchor rod component also includes a first limiting ring arranged on the anchor rod, and the first limiting ring is arranged above the first limiting portion and close to the first limiting portion. The first limiting ring is used to provide a blocking force to the multiple first wedge-shaped portions when the anchor rod component is inserted into the soil, so as to prevent the first wedge-shaped portions and the anchor rod from moving relative to each other along the length direction of the anchor rod.

[0011] In the above technical solution, when the first wedge assembly follows the anchor rod to be inserted into the soil, the first wedge portion in the first wedge assembly is subject to the resistance of the soil in the soil layer, and the first wedge portion is prone to relative sliding with the first limiting portion of the anchor rod, and is not inserted into the soil layer together with the anchor rod. By arranging a first limiting ring on the anchor rod, the first limiting ring protrudes outward from the anchor rod, and the first limiting ring can provide a blocking force to the multiple first wedge portions, so that the first wedge portions overcome the resistance of the soil and are inserted into the soil together with the anchor rod in a relatively fixed manner.

[0012] In some embodiments, a second limiting portion is provided at the middle position of the anchor rod, and the distance between the second limiting portion and the center of the anchor rod gradually increases from the upper end to the lower end to form an inclined second limiting surface on the side of the second limiting portion; the anchor rod component also includes a second wedge assembly, the second wedge assembly includes a plurality of second wedge portions, the plurality of second wedge portions are arranged around the circumference of the second limiting portion, and the second wedge portion has a second wedge surface that contacts and cooperates with the second limiting surface; when the positions of the plurality of second wedge portions are fixed, the second wedge portion and the second limiting surface of the second limiting portion are limited and cooperated to prevent the anchor rod from moving from the lower end to the upper end relative to the second wedge portion.

[0013] In the above technical solution, the anchoring capacity of the anchor rod is relatively weak only by relying on the first wedge assembly. Therefore, by setting the second wedge assembly, it can cooperate with the first wedge assembly to further reinforce the anchor rod step by step, and further improve the anchoring capacity of the anchor rod. Specifically, the second wedge assembly includes a plurality of second wedges, and the plurality of second wedges are arranged around the circumference of the second limiting portion. After the second wedge assembly and the anchor rod are inserted into the soil in a relatively fixed manner, the plurality of second wedges of the second wedge assembly are located on the outer circumference of the second limiting portion, and the plurality of second wedges are limitedly matched with each second limiting surface of the second limiting portion. When the anchor rod has a tendency to move outward, since the soil provides resistance and friction to the plurality of first wedges and second wedges, due to the relationship between the action force and the reaction force, the combined force of the extrusion force and friction force of the plurality of first wedges and second wedges on the first limiting portion and the second limiting portion of the anchor rod respectively, further plays the role of anchoring the anchor rod, and realizes the function of secondary locking.

[0014] In some embodiments, the second wedge-shaped portion further includes a vertical surface, which is connected to the second wedge-shaped surface and is located on one side of the lower end of the second wedge-shaped surface.

[0015] In the above technical solution, by setting the vertical surface on the second wedge-shaped part, when the second limiting part starts to contact the vertical surface, it will not play the function of anchoring the anchor rod, and then the anchoring and locking of the anchor rod is divided into two stages. In the first stage, when the anchor rod moves upward, the second limiting part of the anchor rod contacts the vertical surface of the second wedge-shaped part, which will not squeeze the anchor rod, and then it will not play the function of anchoring and locking. The anchor rod only realizes the anchoring and locking of the anchor rod through the first limiting part and the multiple first wedge-shaped parts of the first wedge-shaped assembly. When the anchor rod is in the second stage, that is, when the anchor rod continues to move outward, the second limiting part of the anchor rod contacts the second wedge-shaped surface of the second wedge-shaped part and generates a squeezing force, and the first limiting part of the anchor rod contacts the first wedge-shaped surface of the first wedge-shaped part and generates a squeezing force, which is equivalent to the first wedge assembly and the second wedge assembly jointly playing a secondary superimposed expansion and squeezing on the anchor rod, thereby achieving the purpose of graded lateral expansion reinforcement of the anchor rod and enhancing the reinforcement effect.

[0016] In some embodiments, the cross-sectional shape of the second limiting portion is an isosceles trapezoid, the second limiting portion includes four second limiting surfaces, and the number of the second wedge-shaped portions is correspondingly set to at least two.

[0017] In the above technical solution, the cross-sectional shape of the second limiting part is an isosceles trapezoid, and the second limiting part has four second limiting surfaces distributed in the circumferential direction, that is, the shape of the second limiting part is a quadrangular pyramid. In this way, the second limiting part and the plurality of second wedge-shaped parts are limited and matched, so that the plurality of second wedge-shaped parts cooperate together, and the plurality of second limiting surfaces of the second limiting part are limited and matched respectively, so that the second limiting part and the second wedge-shaped component have a plurality of limiting surfaces to cooperate, so that the circumferential pull-out resistance of the second limiting part on the anchor rod is more uniform, the anchor rod will not have weak points, and the anchor rod is not prone to local tipping or tilting, which plays an effective anchoring role for the anchor rod, thereby improving the anchoring effect on the vegetation blanket.

[0018] In some embodiments, the anchor rod component also includes a second limiting ring arranged on the anchor rod, and the second limiting ring is arranged above the second limiting portion and close to the second limiting portion. The second limiting ring is used to provide a blocking force to the second wedge-shaped portion when the anchor rod component is inserted into the soil to prevent the second wedge-shaped portion and the anchor rod from moving relative to each other along the length direction of the anchor rod.

[0019] In the above technical solution, when the second wedge assembly follows the anchor rod to be inserted into the soil, the second wedge portion in the second wedge assembly is subject to the resistance of the soil in the soil layer, and the second wedge portion is prone to relative sliding with the second limiting portion of the anchor rod, and is not inserted into the soil layer together with the anchor rod. By arranging a second limiting ring on the anchor rod, the second limiting ring protrudes outward from the anchor rod, and the second limiting ring can provide a blocking force to the plurality of second wedge portions, so that the plurality of second wedge portions overcome the resistance of the soil, and are inserted into the soil together with the anchor rod in a relatively fixed manner.

[0020] In some embodiments, the anchor rod is formed by overlapping two sheet-like bamboo rods, and the two bamboo rods are spaced apart at the upper ends of the anchor rod to form a Y-shaped opening, and a tail wedge is inserted into the opening.

[0021] In the above technical solution, by setting the two sheet-like bamboo poles at the upper end of the anchor rod apart from each other, it is convenient to insert the tail wedge into the opening, so that the size of the upper end of the anchor rod becomes larger, which has a certain compression effect on the vegetation blanket and increases the contact area between the anchor rod and the vegetation blanket.

[0022] In some embodiments, the anchor member further includes a pressure plate, which is disposed at the upper end of the anchor and located at the lower side of the tail wedge, and the pressure plate is used to contact the vegetation blanket to press the vegetation blanket against the soil surface.

[0023] In the above technical solution, through the setting of the pressure plate, after the anchor rod is inserted into the soil, the pressure plate is abutted against the vegetation blanket. Under the limiting action of the tail wedge, the pressure plate will not move outward, providing a pressing effect on the vegetation blanket, increasing the contact area between the anchor rod and the vegetation blanket, and improving the fixing effect of the vegetation blanket.

[0024] In the second aspect, an embodiment of the present application also provides a method for using an anchor member for fixing a vegetation blanket on a debris flow slope, the method comprising the following steps: calculating the design tension value of the anchor and the diameter of the anchor according to the soil properties of the debris flow slope; calculating the slope ratio i of the debris flow slope, and calculating the insertion angle α of the anchor into the debris flow slope, where α is the angle between the anchor and the horizontal plane; wherein α=32.5i-4; inserting the anchor into the debris flow slope at the insertion angle α.

[0025] In the above scheme, the stability of the anchor rod inserted into the debris flow slope is affected by many factors. The anchor rod tension design value, anchor rod diameter and anchor rod insertion angle will affect the anchor rod stress state, and thus affect the slope stability of the debris flow slope. This scheme calculates the anchor rod tension design value and anchor rod diameter according to the soil properties of the debris flow slope, and the appropriate insertion angle can optimize the anti-slip effect of the anchor rod. The slope ratio of the slope is obtained by calculation, and then the anchor rod insertion angle is obtained according to the formula, which can improve the anti-slip effect of the anchor rod on the slope.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 An exploded schematic diagram of an anchor member for fixing vegetation blankets on debris flow slopes according to some embodiments of the present application;

[0029] Figure 2 A schematic diagram of the structure of an anchor member for fixing vegetation blankets on debris flow slopes provided in some embodiments of the present application;

[0030] Figure 3 A schematic diagram of the structure of an anchor member for fixing a vegetation blanket on a debris flow slope according to other embodiments of the present application;

[0031] Figure 4 A schematic diagram of the structure of the anchor rods provided in some embodiments of the present application inserted into the soil layer and matched with the vegetation blanket;

[0032] Figure 5 Schematic diagram of the relationship between the slope foot of the arch and the inclination angle of the anchor rod in some embodiments of the present application.

[0033] Icons: 100-anchor member; 10-anchor rod; 11-upper end; 12-lower end; 121-tip; 13-first limiting ring; 14-second limiting ring; 15-opening; 16-tail wedge; 20-first limiting portion; 21-first limiting surface; 30-first wedge assembly; 31-first wedge portion; 310-first wedge surface; 40-second limiting portion; 41-second limiting surface; 50-second wedge assembly; 51-second wedge portion; 510-second wedge surface; 511-vertical surface; 60-pressure plate; 70-latex ring; 200-soil layer; 300-vegetation blanket. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Example

[0040] The present application embodiment provides an anchor member for fixing vegetation blanket on debris flow slope, please refer to Figures 1 to 5The anchor rod 100 is used to fix the vegetation blanket 300. The anchor rod 100 includes an anchor rod 10, a first limiting portion 20 and a first wedge assembly 30. The anchor rod 10 has a lower end 12 and an upper end 11 in the length direction; the first limiting portion 20 is arranged at the lower end 12, and the distance between the first limiting portion 20 and the center of the anchor rod 10 gradually increases from the upper end 11 to the lower end 12, so as to form an inclined first limiting surface 21 on the side of the first limiting portion 20; the first wedge assembly 30 includes a plurality of first wedge portions 31, and the plurality of first wedge portions 31 are arranged around the peripheral side of the first limiting portion 20; the first wedge portion 31 has a first wedge surface 310 contacting and matching with the first limiting surface 21; wherein, when the positions of the plurality of first wedge portions 31 are fixed, the plurality of first wedge portions 31 are limitedly matched with the first limiting surface 21 of the first limiting portion 20 to prevent the anchor rod 10 from moving from the lower end 12 to the upper end 11 relative to the first wedge portion 31.

[0041] In this solution, the first limiting portion 20 is provided at the lower end 12 of the anchor rod 10, and the distance between the first limiting portion 20 and the center of the anchor rod 10 gradually increases, so that an inclined first limiting surface 21 is formed on the side of the first limiting portion 20 at the lower end 12 of the anchor rod 10. The first wedge assembly 30 includes a plurality of first wedge portions 31, and the plurality of first wedge portions 31 are arranged around the circumference of the first limiting portion 20. After the first wedge assembly 30 and the anchor rod 10 are inserted into the soil in a relatively fixed manner, the plurality of first wedge portions 31 of the first wedge assembly 30 are located on the outer circumference of the first limiting portion 20, and the plurality of first wedge portions 31 are limitedly matched with the first limiting surfaces 21 of the first limiting portion 20. When the anchor rod 10 has a tendency to move outward, since the soil provides resistance and friction to the multiple first wedge-shaped parts 31, due to the relationship between the action force and the reaction force, the combined force of the squeezing force and the friction force of the multiple first wedge-shaped parts 31 on the first limit part 20 of the anchor rod 10 is relied on to anchor the anchor rod 10. And as the displacement of the anchor rod 10 moving upward increases, the anchoring force gradually increases with the outward movement of the rod, thereby playing an effective anchoring role for the anchor rod 10, and the anchor rod 10 is not easy to be pulled out, thereby improving the anchoring effect on the vegetation blanket 300, making the installation stability of the vegetation blanket 300 higher.

[0042] The anchor rod 10 may be made of a variety of materials, for example, the anchor rod 10 may be made of steel or bamboo. In this embodiment, the anchor rod 10 is made of bamboo. Figure 3 As shown, the lower end 12 of the anchor rod 10 may be provided with a tip portion 121 , and the tip portion 121 facilitates the anchor rod 10 to be inserted into the soil layer 200 .

[0043] In addition, the shape of the first limiting portion 20 can be a truncated cone, a triangular prism or a quadrangular prism. Optionally, the shape of the first limiting portion 20 is a quadrangular prism.

[0044] In some embodiments, the anchor rod 10 is formed by stacking at least two pieces of bamboo rods, and the cross-section of the anchor rod 10 is rectangular. By stacking multiple pieces of bamboo rods, the material is easy to obtain and the cost is low, which is conducive to the production and promotion of the anchor rod 10.

[0045] Wherein, anchor rod 10 is formed by overlapping two sheet-like bamboo poles. Of course, the two bamboo poles can be fixed by glue or by rubber rings.

[0046] In some embodiments, please refer to Figure 1 , the cross-sectional shape of the first limiting portion 20 is an isosceles trapezoid, the first limiting portion 20 has four first limiting surfaces 21 distributed in the circumferential direction, and the number of the first wedge-shaped portions 31 is set to at least two. By making the cross-sectional shape of the first limiting portion 20 an isosceles trapezoid, the first limiting portion 20 has four first limiting surfaces 21 distributed in the circumferential direction, that is, the shape of the first limiting portion 20 is a quadrangular pyramid. In this way, the first limiting portion 20 is limitedly matched with the plurality of first wedge-shaped portions 31, so that the plurality of first wedge-shaped portions 31 cooperate together, and the plurality of first limiting surfaces 21 of the first limiting portion 20 are limitedly matched respectively, so that there are a plurality of limiting surfaces between the first limiting portion 20 and the first wedge-shaped assembly 30, so that the circumferential pull-out resistance of the first limiting portion 20 at the lower end 12 of the anchor rod 10 is more uniform, the anchor rod 10 will not have a weak point, and the anchor rod 10 is not prone to local tipping or tilting, which plays an effective anchoring role for the anchor rod 10, thereby improving the anchoring effect on the vegetation blanket 300.

[0047] The number of the first wedge-shaped portions 31 may be two or more. When there are two first wedge-shaped portions 31 , the two first wedge-shaped portions 31 are respectively matched with two opposite first limiting surfaces 21 on the first limiting portion 20 .

[0048] When there are four first wedge-shaped portions 31 , the four first wedge-shaped portions 31 are respectively matched with the four first limiting surfaces 21 on the first limiting portion 20 for limiting purposes.

[0049] In some embodiments, please refer to Figure 1The anchor member 100 further includes a first stop ring 13 disposed on the anchor 10. The first stop ring 13 is disposed above and close to the first stop portion 20. The first stop ring 13 is used to provide a blocking force to the plurality of first wedge portions 31 when the anchor member 100 is inserted into the soil, so as to prevent the first wedge portions 31 and the anchor 10 from moving relative to each other along the length direction of the anchor 10. When the first wedge assembly 30 is inserted into the soil following the anchor 10, the first wedge portions 31 in the first wedge assembly 30 are subject to resistance from the soil in the soil layer 200, so that the first wedge portions 31 are prone to relative sliding with the first stop portion 20 of the anchor 10, and are not inserted into the soil layer 200 together with the anchor 10. By arranging a first limiting ring 13 on the anchor rod 10, the first limiting ring 13 protrudes outward from the anchor rod 10, and the first limiting ring 13 can provide a blocking force to the multiple first wedge-shaped portions 31, so that the first wedge-shaped portions 31 overcome the resistance of the soil and are inserted into the soil together with the anchor rod 10 in a relatively fixed manner.

[0050] In some embodiments, please refer to Figure 1 and Figure 2A second limiting portion 40 is provided at the middle position of the anchor rod 10, and the distance between the second limiting portion 40 and the center of the anchor rod 10 gradually increases from the upper end 11 to the lower end 12, so as to form an inclined second limiting surface 41 on the side of the second limiting portion 40; the anchor rod member 100 also includes a second wedge assembly 50, and the second wedge assembly 50 includes a plurality of second wedge portions 51, and the plurality of second wedge portions 51 are arranged around the circumference of the second limiting portion 40, and the second wedge portion 51 has a second wedge surface 510 that contacts and cooperates with the second limiting surface 41; when the positions of the plurality of second wedge portions 51 are fixed, the second wedge portion 51 is limitedly cooperated with the second limiting surface 41 of the second limiting portion 40 to prevent the anchor rod 10 from moving from the lower end 12 to the upper end 11 relative to the second wedge portion 51. The anchoring capacity of the anchor rod 10 is relatively weak only by the first wedge assembly 30. Therefore, the second wedge assembly 50 can cooperate with the first wedge assembly 30 to further reinforce the anchor rod 10 step by step, further improving the reinforcement of the anchoring capacity of the anchor rod 10. Specifically, the second wedge assembly 50 includes a plurality of second wedge portions 51, and the plurality of second wedge portions 51 are arranged around the circumference of the second limiting portion 40. After the second wedge assembly 50 and the anchor rod 10 are inserted into the soil in a relatively fixed manner, the plurality of second wedge portions 51 of the second wedge assembly 50 are located on the outer circumference of the second limiting portion 40, and the plurality of second wedge portions 51 are limitedly matched with the respective second limiting surfaces 41 of the second limiting portion 40. When the anchor rod 10 has a tendency to move outward, since the soil provides resistance and friction to the multiple first wedge-shaped portions 31 and the second wedge-shaped portions 51, due to the relationship between the action force and the reaction force, the multiple first wedge-shaped portions 31 and the second wedge-shaped portions 51 respectively exert a combined force of the squeezing force and the friction force on the first limiting portion 20 and the second limiting portion 40 of the anchor rod 10, thereby further anchoring the anchor rod 10 and realizing the secondary locking function.

[0051] In some embodiments, please refer to Figure 1 and Figure 2The second wedge-shaped portion 51 further includes a vertical surface 511, which is connected to the second wedge-shaped surface 510 and is located on one side of the lower end 12 of the second wedge-shaped surface 510. By setting the vertical surface 511 on the second wedge-shaped portion 51, when the second limiting portion 40 starts to contact with the vertical surface 511, it will not play the function of anchoring the anchor rod 10, and then the anchoring and locking of the anchor rod 10 is divided into two stages. In the first stage, when the anchor rod 10 moves upward, the second limiting portion 40 of the anchor rod 10 contacts with the vertical surface 511 of the second wedge-shaped portion 51, which will not squeeze the anchor rod 10, and thus will not play the function of anchoring and locking. The anchor rod 10 is only limited by the first limiting portion 20 and the plurality of first wedge-shaped portions 31 of the first wedge assembly 30 to achieve the anchoring and locking of the anchor rod 10. When the anchor rod 10 is in the second stage, that is, when the anchor rod 10 continues to move outward, the second limiting portion 40 of the anchor rod 10 contacts the second wedge surface 510 of the second wedge portion 51 and generates an extrusion force, and the first limiting portion 20 of the anchor rod 10 contacts the first wedge surface 310 of the first wedge portion 31 and generates an extrusion force, which is equivalent to the first wedge component 30 and the second wedge component 50 jointly exerting a secondary superimposed expansion and extrusion on the anchor rod 10, thereby achieving the purpose of graded lateral expansion reinforcement of the anchor rod 10 and enhancing the reinforcement effect.

[0052] In some embodiments, please refer to Figure 1 and Figure 2 , the cross-sectional shape of the second limiting portion 40 is an isosceles trapezoid, the second limiting portion 40 includes four second limiting surfaces 41, and the number of the second wedge-shaped portions 51 is set to at least two. By making the cross-sectional shape of the second limiting portion 40 an isosceles trapezoid, the second limiting portion 40 has four second limiting surfaces 41 distributed in the circumferential direction, that is, the shape of the second limiting portion 40 is a quadrangular pyramid. In this way, the second limiting portion 40 is limitedly matched with the plurality of second wedge-shaped portions 51, so that the plurality of second wedge-shaped portions 51 cooperate together, and the plurality of second limiting surfaces 41 of the second limiting portion 40 are limitedly matched respectively, so that there are a plurality of limiting surfaces between the second limiting portion 40 and the second wedge-shaped assembly 50, so that the circumferential pull-out resistance of the second limiting portion 40 on the anchor rod 10 is more uniform, the anchor rod 10 will not have a weak point, and the anchor rod 10 is not prone to local tipping or tilting, which plays an effective anchoring role for the anchor rod 10, thereby improving the anchoring effect on the vegetation blanket 300.

[0053] The number of the second wedge-shaped portions 51 may be two or more. When there are two second wedge-shaped portions 51 , the two second wedge-shaped portions 51 are respectively matched with two opposite second limiting surfaces 41 on the second limiting portion 40 .

[0054] When there are four second wedge-shaped portions 51 , the four second wedge-shaped portions 51 are respectively engaged with the four second limiting surfaces 41 on the second limiting portion 40 .

[0055] In some embodiments, the anchor member 100 further includes a second stop ring 14 disposed on the anchor 10, the second stop ring 14 being disposed above the second stop portion 40 and being disposed close to the second stop portion 40, and the second stop ring 14 being used to provide a blocking force to the second wedge portion 51 when the anchor member 100 is inserted into the soil, so as to prevent the second wedge portion 51 and the anchor 10 from moving relative to each other along the length direction of the anchor 10. When the second wedge assembly 50 is inserted into the soil following the anchor 10, the second wedge portion 51 in the second wedge assembly 50 is subject to the resistance of the soil in the soil layer 200, and the second wedge portion 51 is prone to relative sliding with the second stop portion 40 of the anchor 10, and is not inserted into the soil layer 200 together with the anchor 10. By arranging a second limiting ring 14 on the anchor rod 10, the second limiting ring 14 protrudes outward from the anchor rod 10, and the second limiting ring 14 can provide blocking force to the multiple second wedge-shaped portions 51, so that the multiple second wedge-shaped portions 51 overcome the resistance of the soil and are inserted into the soil together with the anchor rod 10 in a relatively fixed manner.

[0056] In some embodiments, the anchor rod 10 is formed by stacking two pieces of bamboo rods, and the two pieces of bamboo rods are spaced apart at the upper end 11 of the anchor rod 10 to form a Y-shaped opening 15, and the opening 15 is inserted with a tail wedge 16. By arranging the two pieces of bamboo rods at the upper end 11 of the anchor rod 10 at a distance, it is convenient to insert the tail wedge 16 at the opening 15, so that the size of the upper end 11 of the anchor rod 10 becomes larger, which has a certain compression effect on the vegetation blanket 300, and increases the contact area between the anchor rod 10 and the vegetation blanket 300.

[0057] Among them, a latex ring 70 may be provided at the upper end 11 of the anchor rod 10, and the latex ring 70 is used to clamp the tail wedge 16. In order to limit the latex ring 70 from sliding on the anchor rod 10 in a direction away from the upper end 11 of the anchor rod 10, a limiting groove is correspondingly provided on the outer circumference of the anchor rod 10, and the latex ring 70 is embedded in the limiting groove, and the limiting groove can prevent the latex ring 70 from sliding on the anchor rod 10. Of course, a pin shaft may also be provided at the upper end of the anchor rod 10, and the pin shaft penetrates the anchor rod 10 and the tail wedge 16, and the tail wedge 16 is fixed to the upper end 11 of the anchor rod 10 through the pin shaft.

[0058] In some embodiments, the anchor member 100 further includes a pressure plate 60, which is disposed at the upper end 11 of the anchor 10 and located at the lower side of the tail wedge 16. The pressure plate 60 is used to contact the vegetation blanket 300 to press the vegetation blanket 300 against the soil surface. By setting the pressure plate 60, after the anchor 10 is inserted into the soil, the pressure plate 60 is abutted against the vegetation blanket 300. Under the limiting effect of the tail wedge 16, the pressure plate 60 will not move outward, providing a pressing effect on the vegetation blanket 300, increasing the contact area between the anchor 10 and the vegetation blanket 300, and improving the fixing effect on the vegetation blanket 300.

[0059] The pressing plate 60 may be a pad, and the shape of the pad may be square, triangular, or circular, etc. The shape of the pressing plate 60 may be determined according to actual conditions.

[0060] An embodiment of the present application also provides a method for using an anchor member for fixing a vegetation blanket on a debris flow slope, the method comprising the following steps: calculating the design tension value of the anchor and the diameter of the anchor according to the soil properties of the debris flow slope; calculating the slope ratio i of the debris flow slope, and calculating the insertion angle α of the anchor into the debris flow slope, where α is the angle between the anchor and the horizontal plane; wherein α=32.5i-4; inserting the anchor into the debris flow slope at the insertion angle α.

[0061] In the above scheme, the stability of the anchor rod inserted into the debris flow slope is affected by many factors. The anchor rod tension design value, anchor rod diameter and anchor rod insertion angle will affect the anchor rod stress state, and thus affect the slope stability of the debris flow slope. This scheme calculates the anchor rod tension design value and anchor rod diameter according to the soil properties of the debris flow slope, and the appropriate insertion angle can optimize the anti-slip effect of the anchor rod. The slope ratio of the slope is obtained by calculation, and then the anchor rod insertion angle is obtained according to the formula, which can improve the anti-slip effect of the anchor rod on the slope.

[0062] The anchor rod of this scheme can be adapted to shallow landslides of slag bodies.

[0063] The following is a detailed description of the design method of the anchor rod in this scheme:

[0064] 1. Anchor anti-slip force formula

[0065] The anti-sliding force of the anchor rod should satisfy the balance between the sliding force of the sliding body and the anti-sliding force:

[0066]

[0067] 1.1 Anchor tensile strength

[0068]

[0069] in:

[0070] : Design value of anchor tension (kN);

[0071] : Angle between the anchor rod and the horizontal plane (°).

[0072] 1.2 Anchor friction

[0073] The friction resistance comes from the shear strength of the anchor section:

[0074]

[0075] in:

[0076] : Anchor diameter (m);

[0077] : Anchorage section length (m);

[0078] : Shear force per unit length of anchoring section (kN / m), ;

[0079] Cohesion (kPa or N / m²);

[0080] Angle of internal friction (°);

[0081] Normal force or normal stress (kPa or N / m²) .

[0082] In summary:

[0083]

[0084] 1.3 Mechanical bite force

[0085] The value is determined according to the shape of the barb of the anchor rod. The patent of this invention is designed to be 3~10kN, as shown in the following table.

[0086] Table 1 Relationship between slope foot and mechanical bite force

[0087] Slope / ° Mechanical bite force / kN 0° 3 10° 3~5.5 20° 5.5~7 30° 7~8.5 40° 8.5~10

[0088] 1.4 Total anti-slip force

[0089] The anchor rod needs to satisfy the balance between the total anti-sliding force and the force of the sliding body:

[0090]

[0091] Cohesion and anti-slip force:

[0092]

[0093] Friction resistance:

[0094]

[0095] Will , , , and Substituting in, we get:

[0096]

[0097] 2. Anchor angle

[0098] Refer to the paper about the insertion angle of the anchor (i.e. the angle between the anchor and the horizontal plane), which has a significant impact on the stress state of the anchor and the stability of the slope. Figure 5 , the appropriate insertion angle can optimize the anti-slip effect of the anchor rod. Under feasible construction conditions, the anchor rod inclination angle should be calculated as follows:

[0099] α=32.5i-4

[0100] in, is the anchor inclination angle, is the inclination angle of the sliding surface (weak structural surface)

[0101] Table 2 Relationship between slope foot and anchor inclination

[0102]

[0103] 3. Anchorage length formula

[0104] Referring to the "Influence of Anchor Rod Length and Slope Ratio on Optimal Anchor Angle", when the anchor angle is 20°~50° and the construction is feasible, the anchor length should be calculated as follows:

[0105] Table 3 Relationship between anchor inclination and anchoring length

[0106]

[0107] 4 Slope stability analysis and calculation

[0108] 4.1 Slope stability coefficient Derivation of

[0109] The stability coefficient calculation of the plane sliding limit equilibrium method is an analytical method for the sliding force formed by the gravity of the rock mass when the rock mass on the slope slides along a single structural surface or weak surface, which is the sliding resistance provided by the cohesion and internal friction angle of the structural surface.

[0110] Slope stability coefficient formula:

[0111]

[0112] in:

[0113] : Sliding surface cohesion (kPa)

[0114] : Sliding surface segment length (m)

[0115] : Normal force on sliding surface,

[0116] : Internal friction angle of sliding surface (°)

[0117] : Sliding body weight (kN)

[0118] : Angle between the sliding surface and the horizontal plane (°)

[0119] 5 Practical Background Calculation Examples

[0120] Taking surface sliding failure as the case background, the total anti-sliding force is calculated based on different soil backgrounds. Take the slope foot 40°, anchor tension 100.000kN anchor diameter 0.016m, sliding body weight 500.000kN, and sliding surface length 10.000m.

[0121] According to the Technical Specification for Geotechnical Anchor and Shotcrete Support Engineering GB 50086-2015, the Technical Code for Building Foundation Pit Support JGJ 120-2012 and general engineering practice, the common values ​​of anchor diameter and tension are as follows:

[0122] Table 4 Common values ​​of anchor diameter and tension

[0123] Anchor rod diameter / mm Design value of anchor tension / kN Scope of application 16 100 Suitable for anchoring light structures or secondary locations 20 200 Widely used in general construction and civil engineering 25 300 Used in structural parts that require higher bearing capacity 32 400 Suitable for heavy structures or special engineering needs

[0124] Table 5 List of rock and soil physical and mechanical properties and structural parameters

[0125]

[0126] Table 6 Calculation results of anchor length and total anti-slip force (considering mechanical bite force)

[0127]

[0128] Table 7 Calculation results of anchor length and total anti-slip force (without considering mechanical bite force)

[0129]

[0130] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0131] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anchor rod for fixing vegetation blanket on debris flow slope, used for fixing vegetation blanket, characterized in that: include: An anchor rod, the anchor rod having a lower end and an upper end in a length direction; A first limiting portion is disposed at the lower end, and in a direction from the upper end to the lower end, a distance between the first limiting portion and the center of the anchor rod gradually increases, so as to form an inclined first limiting surface on a side surface of the first limiting portion; A first wedge assembly is disposed separately from the first limiting portion, the first wedge assembly comprises a plurality of first wedge portions, the plurality of first wedge portions are disposed around the outer circumference of the first limiting portion; the first wedge portion has a first wedge surface that contacts and cooperates with the first limiting surface; Wherein, when the positions of the plurality of first wedge-shaped portions are fixed, the plurality of first wedge-shaped portions are limitedly matched with the first limiting surface of the first limiting portion to prevent the anchor rod from moving from the lower end to the upper end relative to the first wedge-shaped portion; A second limiting portion is provided at the middle of the anchor rod, and the distance between the second limiting portion and the center of the anchor rod gradually increases from the upper end to the lower end, so as to form an inclined second limiting surface on the side of the second limiting portion; The anchor rod also includes a second wedge assembly, the second wedge assembly includes a plurality of second wedge portions, the plurality of second wedge portions are arranged around the circumference of the second limiting portion, and the second wedge portion has a second wedge surface that contacts and cooperates with the second limiting surface; When the positions of the plurality of second wedge-shaped portions are fixed, the second wedge-shaped portion and the second limiting surface of the second limiting portion are limitedly matched to prevent the anchor rod from moving from the lower end to the upper end relative to the second wedge-shaped portion; The second wedge-shaped portion further includes a vertical surface, which is connected to the second wedge-shaped surface and is located on a lower side of the second wedge-shaped surface.

2. The anchor member for fixing vegetation blanket on debris flow slope according to claim 1, characterized in that: The anchor rod is formed by stacking at least two sheet-shaped bamboo rods, and the cross-section of the anchor rod is rectangular.

3. The anchor member for fixing vegetation blanket on debris flow slope according to claim 1, characterized in that: The cross-sectional shape of the first limiting portion is an isosceles trapezoid, and the first limiting portion has four first limiting surfaces distributed in the circumferential direction; The number of the first wedge-shaped portions is set to at least two.

4. The anchor member for fixing vegetation blanket on debris flow slope according to claim 1, characterized in that: The anchor rod component also includes a first limiting ring arranged on the anchor rod, and the first limiting ring is arranged above the first limiting portion and close to the first limiting portion. The first limiting ring is used to provide a blocking force to the multiple first wedge-shaped portions when the anchor rod component is inserted into the soil, so as to prevent the first wedge-shaped assembly and the anchor rod from moving relative to each other along the length direction of the anchor rod.

5. The anchor member for fixing vegetation blanket on debris flow slope according to claim 1, characterized in that: The cross-sectional shape of the second limiting portion is an isosceles trapezoid. The second limiting portion includes four second limiting surfaces distributed in the circumferential direction. The number of the second wedge-shaped portions is set to at least two.

6. The anchor member for fixing vegetation blanket on debris flow slope according to claim 1, characterized in that: The anchor rod component also includes a second limiting ring arranged on the anchor rod, and the second limiting ring is arranged above the second limiting portion and close to the second limiting portion. The second limiting ring is used to provide a blocking force to the second wedge-shaped portion when the anchor rod component is inserted into the soil to prevent the second wedge-shaped portion and the anchor rod from moving relative to each other along the length direction of the anchor rod.

7. The anchor member for fixing vegetation blanket on debris flow slope according to claim 2, characterized in that: The anchor rod is formed by overlapping two sheet-shaped bamboo rods, and the two bamboo rods are spaced apart at the upper ends of the anchor rod to form a Y-shaped opening, wherein a tail wedge is inserted into the opening.

8. A method for using an anchor member for fixing a vegetation blanket on a debris flow slope, based on the anchor member for fixing a vegetation blanket on a debris flow slope according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: According to the soil properties of the debris flow slope, the tension design value and the diameter of the anchor are calculated; Calculate the slope ratio i of the debris flow slope, and calculate the insertion angle α of the anchor rod inserted into the debris flow slope, where α is the angle between the anchor rod and the horizontal plane; wherein α=32.5i-4; the value of i is one of 0.176, 0.364, 0.577, and 0.839; The lower end of the anchor rod is inserted into the debris flow slope at an insertion angle α.

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