Pressure-equalizing pre-stressed anchor cable

Abstract

The utility model discloses a pressure equalizing type pre-stressed anchor cable which comprises a carbon fiber cable, a buffer layer, a steel cable and a sleeve which are sequentially arranged from inside to outside in the radial direction, the buffer layer wraps the radial outer surface of the carbon fiber cable, and the sleeve is arranged on the radial outer surface of the buffer layer in a sleeved mode. The buffer layer is provided with a containing groove, and the steel cable is arranged in the containing groove; the buffer layer is arranged between the carbon fiber rope and the steel rope, so that the carbon fiber rope and the steel rope are not in direct contact, stress between the carbon fiber plate and the reinforcing steel bars can be evenly distributed, and the shear resistance and the tension resistance of the anchor cable are effectively improved; meanwhile, the carbon fiber cable is wrapped by the buffer layer, and the steel cable is stored in the containing groove, so that even if the sleeve of the anchor cable is damaged, the buffer layer can form buffering, the carbon fiber cable and the steel cable cannot be directly exposed, and the stability of the anchor cable in a complex working environment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of slope reinforcement and relates to a pressure-equalizing prestressed anchor cable. Background Art

[0002] Prestressed anchoring technology has become one of the most widely used reinforcement measures in geotechnical engineering. It has the characteristics of large anchoring radius, strong anchoring force, and wide reinforcement range, and plays an important role in the slope reinforcement process. Prestressed carbon fiber anchor cable is a composite material anchor cable with the advantages of light weight and strong tensile strength, and is often used for slope reinforcement.

[0003] Common prestressed carbon fiber anchor cables are those that are equipped with steel cables on the outside of the carbon fiber cables, and then covered with an outer tube sleeve made of PE material for protection. During use, the steel cables are in direct contact with the carbon fiber cables, which causes friction and compression between the two during use, affecting the shear and tensile resistance of the anchor cables. The outer sleeve is also directly mounted on the outside, which results in the outer sleeve being easily broken in actual use, especially when used in rock areas with strong acids and alkalis, after being rubbed, squeezed and corroded by the rock mass, exposing the carbon fiber cable body and the steel cable. In complex working environments, their stability is weakened, which can cause rocks to roll down, posing certain risks.

[0004] In order to solve the above problems, a prestressed anchor cable with better tensile and shear resistance is needed to improve the stability of slope anchoring. Utility Model Content

[0005] In view of this, the utility model provides a pressure-equalizing prestressed anchor cable, in which a buffer layer is arranged between the carbon fiber cable and the steel cable so that the two are not in direct contact, and the stress between the carbon fiber plate and the steel bar can be evenly distributed, thereby effectively improving the shear resistance and tensile resistance of the anchor cable; at the same time, the buffer layer covers the carbon fiber cable, and the accommodating groove accommodates the steel cable, so that even if the casing of the anchor cable of the utility model is damaged, the buffer layer will form a buffer, and the carbon fiber cable and the steel cable will not be directly exposed, thereby improving the stability of the anchor cable in complex working environments.

[0006] The utility model discloses a pressure-equalizing prestressed anchor cable, comprising a carbon fiber cable, a buffer layer, a steel cable and a sleeve which are arranged in sequence from the inside to the outside along the radial direction, wherein the buffer layer is coated on the radial outer surface of the carbon fiber cable, and the sleeve is sleeved on the radial outer surface of the buffer layer; the buffer layer is provided with a receiving groove, and the steel cable is arranged in the receiving groove.

[0007] Furthermore, the buffer layer extends radially outward to form a supporting edge, and the receiving groove is arranged on the supporting edge.

[0008] Furthermore, the notch of the accommodating groove is located on the side wall of the supporting edge, and the accommodating groove has a supporting surface for supporting the steel cable and a guiding surface for assisting the steel cable to enter the accommodating groove, and the supporting surface and the guiding surface are connected by an arc transition so that the accommodating groove has a "C"-shaped structure.

[0009] Furthermore, the support surface is located on the radial inner side of the accommodating groove, and the support surface is a curved surface conforming to the surface of the steel cable.

[0010] Furthermore, the guide surface is located radially outside the accommodating groove, and the guide surface is a curved convex free-form surface conforming to the surface of the steel cable.

[0011] Furthermore, the radial outer end surface of the supporting edge is a supporting surface, and the supporting surface is a curved surface conforming to the inner wall surface of the sleeve, and the supporting surface is arranged to be supported by the inner wall surface of the sleeve.

[0012] Furthermore, the width of the slot of the accommodating groove is L, the diameter of the steel cable is D, and the width L of the slot of the accommodating groove is not less than the diameter D of the steel cable.

[0013] Furthermore, a plurality of the steel cables are evenly arranged along the circumferential direction, the number of the supporting edges is equal to that of the steel cables, and the supporting edges and the steel cables are arranged in a one-to-one correspondence.

[0014] Furthermore, the buffer layer is provided with an installation channel along the central axis, and the carbon fiber cable is installed in the installation channel.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a pressure-equalizing prestressed anchor cable, in which a buffer layer is arranged between the carbon fiber cable and the steel cable so that the two are not in direct contact, and the stress between the carbon fiber plate and the steel bar can be evenly distributed, thereby effectively improving the shear resistance and tensile resistance of the anchor cable; at the same time, the buffer layer covers the carbon fiber cable, and the accommodating groove accommodates the steel cable, so that even if the casing of the anchor cable of the utility model is damaged, the buffer layer can form a buffer, and the carbon fiber cable and the steel cable will not be directly exposed, thereby improving the stability of the anchor cable in a complex working environment; the supporting edges of the buffer layer of the utility model are arranged against the inner wall surface of the casing, and the pressure on the casing can also be effectively dispersed, thereby improving the overall compression resistance and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model

[0018] Figure 2 It is a schematic structural diagram of the buffer layer of the utility model. DETAILED DESCRIPTION

[0019] It should be noted that, in the description of this specification, the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0020] As shown in the figure, an embodiment of the utility model discloses a pressure-equalizing prestressed anchor cable, comprising a carbon fiber cable 1, a buffer layer 3, a steel cable 2 and a sleeve 4 which are arranged in sequence from the inside to the outside along the radial direction, wherein the buffer layer 3 is coated on the radial outer surface of the carbon fiber cable 1, and the sleeve 4 is sleeved on the radial outer surface of the buffer layer 3; the buffer layer 3 is provided with a receiving groove, and the steel cable 2 is arranged in the receiving groove. The sleeve 4 in this embodiment can be made of a material with good corrosion resistance, high strength and high toughness, such as a polyvinylidene fluoride (PVDF) sleeve 4, which can withstand the corrosion of strong acids and strong alkalis in a wide pH range and also has a high temperature tolerance; the buffer layer 3 is made of a soft and flexible foam material such as polyethylene foam (PE foam), which is light and has good mitigation performance. It is arranged between the carbon fiber cable 1 and the steel cable 2 to act as a buffer layer 3 so that the two are not in direct contact, avoiding mutual squeezing or friction between the two during use, and can also evenly disperse the stress between the carbon fiber plate and the steel bar to avoid stress concentration, thereby effectively improving the shear resistance and tensile resistance of the anchor cable; at the same time, the buffer layer 3 covers the carbon fiber cable 1, and the accommodating groove accommodates the steel cable 2, so that even if the sleeve 4 of the anchor cable of the utility model is damaged, the buffer layer 3 will form a buffer, and the carbon fiber cable 1 and the steel cable 2 will not be directly exposed, thereby improving the stability of the anchor cable in a complex working environment.

[0021] In this embodiment, the buffer layer 3 extends radially outward to form a supporting ridge 5, and the receiving groove is arranged on the supporting ridge 5. In this embodiment, the notch of the receiving groove is located on the side wall surface of the supporting ridge 5, and the receiving groove has a supporting surface 7 for supporting the steel cable 2 and a guiding surface 8 for assisting the steel cable 2 to enter the receiving groove. The supporting surface 7 and the guiding surface 8 are connected by an arc transition so that the receiving groove has a "C"-shaped structure. In this embodiment, the supporting surface 7 is located on the radial inner side of the receiving groove, and the supporting surface 7 is a curved surface conforming to the surface of the steel cable 2. The guiding surface 8 is located on the radial outer side of the receiving groove, and the guiding surface 8 is a curved convex free-form surface conforming to the surface of the steel cable 2. As shown in the figure, the accommodating groove is arranged on the supporting edge 5, and its notch is arranged on the side wall surface of the supporting edge 5, so that the accommodating groove can accommodate the steel cable 2 in the groove, and even if the outer tube is damaged, the opening of the notch is not radially outward, thus avoiding direct corrosion to the steel cable 2 and extending the service life of the steel cable 2. The accommodating groove as a whole is a "C"-shaped structure composed of multiple curved surfaces, including a guide surface 8, a supporting surface 7, and a connecting curved surface for connecting the guide surface 8 and the supporting surface 7. The aforementioned three curved surfaces are all inner wall surfaces of the accommodating groove, wherein the guide surface 8 is radially far away from the carbon fiber cable 1, and the supporting surface 7 is radially close to the carbon fiber cable 1, as shown in FIG. Figure 1 and 2 As shown, the guide surface and the support surface 7 are transitionally connected through a connecting curved surface to form a complete accommodating groove. The guide surface 8 is a convex free curved surface, and its curved surface structure facilitates the steel cable 2 to enter the accommodating groove. The convexity here is directed to the position away from the notch. The support surface 7 is a curved surface conforming to the surface of the steel cable 2. Such a configuration makes the contact area between the steel cable 2 and the support surface 7 larger, effectively dispersing the pressure, and also ensuring that the buffer layer 3 can effectively support and protect the steel cable 2.

[0022] In this embodiment, the radial outer end surface of the supporting rib 5 is abutting surface 6, and the abutting surface 6 is a curved surface conforming to the inner wall surface of the sleeve 4, and the abutting surface 6 is disposed against the inner wall surface of the sleeve 4. The abutting surface 6 of the supporting rib 5 is conforming to the inner wall surface of the sleeve 4, so that after the supporting rib 5 abuts against the inner wall surface of the sleeve 4, the contact area between the two can be increased, and the pressure on the sleeve 4 can also be effectively dispersed, thereby improving the overall pressure resistance and wear resistance.

[0023] In this embodiment, the width of the slot of the receiving groove is L, the diameter of the steel cable 2 is D, and the slot width L of the receiving groove is not less than the diameter D of the steel cable 2. The width of the slot is larger than the diameter of the steel cable 2, which makes it easier to install the steel cable 2. In this embodiment, the steel cable 2 is evenly arranged with multiple supporting ridges 5 along the circumferential direction, the number of the supporting ridges 5 is equal to the number of the steel cables 2, and the supporting ridges 5 are arranged one by one with the steel cables 2. As shown in the figure, the steel cables 2 in this embodiment are arranged with four along the circumferential direction, and the supporting ridges 5 are also arranged with four, and each supporting ridge 5 has a receiving groove.

[0024] In this embodiment, the buffer layer 3 is provided with an installation channel 9 along the central axis, and the carbon fiber cable 1 is installed in the installation channel 9. Providing the installation channel 9 can facilitate the installation of the carbon fiber cable 1, and the installation channel 9 is located at the central axis position, so that the force of the carbon fiber cable 1 is more reasonable.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A pressure-equalizing prestressed anchor cable, characterized in that: It comprises a carbon fiber rope, a buffer layer, a steel rope and a sleeve which are arranged in sequence from the inside to the outside in radial direction, wherein the buffer layer is coated on the radial outer surface of the carbon fiber rope, and the sleeve is sleeved on the radial outer surface of the buffer layer; the buffer layer is provided with a receiving groove, and the steel rope is arranged in the receiving groove.

2. The pressure-equalizing prestressed anchor cable according to claim 1, characterized in that: The buffer layer extends radially outward to form a supporting edge, and the receiving groove is arranged on the supporting edge.

3. The pressure-equalizing prestressed anchor cable according to claim 2, characterized in that: The notch of the accommodating groove is located on the side wall of the supporting edge. The accommodating groove has a supporting surface for supporting the steel cable and a guiding surface for assisting the steel cable to enter the accommodating groove. The supporting surface and the guiding surface are connected by an arc transition so that the accommodating groove has a "C"-shaped structure.

4. The pressure-equalizing prestressed anchor cable according to claim 3 is characterized in that: The support surface is located on the radial inner side of the accommodating groove, and the support surface is a curved surface conforming to the surface of the steel cable.

5. The pressure-equalizing prestressed anchor cable according to claim 3 is characterized in that: The guide surface is located on the radial outer side of the accommodating groove, and is a curved convex free-form surface conforming to the surface of the steel cable.

6. The pressure-equalizing prestressed anchor cable according to claim 2, characterized in that: The radial outer end surface of the supporting edge is a supporting surface, and the supporting surface is a curved surface conforming to the inner wall surface of the sleeve, and the supporting surface is arranged to be supported by the inner wall surface of the sleeve.

7. The pressure-equalizing prestressed anchor cable according to claim 3 is characterized in that: The width of the slot of the accommodating groove is L, the diameter of the steel cable is D, and the width L of the slot of the accommodating groove is not less than the diameter D of the steel cable.

8. The pressure-equalizing prestressed anchor cable according to claim 2, characterized in that: A plurality of the steel cables are evenly arranged along the circumferential direction, the number of the supporting edges is equal to that of the steel cables, and the supporting edges and the steel cables are arranged in a one-to-one correspondence.

9. The pressure-equalizing prestressed anchor cable according to claim 1, characterized in that: The buffer layer is provided with an installation channel along the central axis, and the carbon fiber cable is installed in the installation channel.

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