Pre-stressed anchor cable structure

Abstract

The utility model relates to the technical field of slope support, in particular to a pre-stressed anchor cable structure which comprises an anchorage device and an anchor cable, and the anchor cable comprises a plurality of steel strands, a sleeve, a plug, a movable plug and a traction piece. The installation position of the casing pipe is adjusted according to the length needing grouting and anchoring for the first time, then the movable plug moves in the length direction of the casing pipe through the traction piece, and when the movable plug moves, cement mortar in the cement storage space is evenly squeezed and discharged through a plurality of reserved holes in the casing pipe; the anchor cable hole is filled with cement mortar, the cement mortar evenly flows out to the position between the sleeve and the hole wall of the anchor cable hole, the sleeve and the anchor cable hole are solidified together, the anchor cable hole is blocked, finally, grouting is conducted on the anchor cable hole through the grouting pipe, and when the cement mortar is injected to the grout overflow hole and the cement mortar continues to be injected, grouting is conducted. And redundant cement mortar enters the mortar overflow pipe and overflows out of the anchor cable hole from the other end of the mortar overflow pipe, so that a worker is reminded that the anchoring length of first grouting meets the design requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of slope support, in particular to a prestressed anchor cable structure. Background Art

[0002] In the management of slope and landslide projects, anchor cables are widely used and are a common measure in slope and landslide management. When installing and using anchor cables, first drill anchor cable holes on the slope, then insert the anchor cables into the holes, and finally pour cement mortar through the grouting pipe to fix the anchor cables on the slope. When pouring cement mortar, anchor cables are often poured in two times, the purpose is to supplement and complete the first grouting to ensure that the rock and soil around the anchor cables are fully filled and reinforced.

[0003] In the process of injecting cement mortar to fix the anchor cable for the first time, the traditional method to control the anchor length of the anchor cable for the first grouting is to calculate the volume of the borehole to determine the volume of cement mortar to control the anchor length of the first grouting. However, due to reasons such as rock fragmentation and cracks, the injected cement mortar leaks, making it difficult to control the anchor length of the prestressed anchor cable for the first grouting and meeting the design requirements. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a prestressed anchor cable structure, which can be used to visually observe and determine whether the first grouting anchoring length of the anchor cable meets the design requirements when in use.

[0005] The technical scheme adopted by the utility model is as follows: a prestressed anchor cable structure comprises an anchor and an anchor cable, the anchor cable is fixedly arranged at one end of the anchor cable and is passed through the anchor cable hole, the anchor cable comprises a plurality of steel strands, the outer sides of the plurality of steel strands are collectively covered with a sleeve, the inner wall of the sleeve near one end of the anchor cable hole is fixedly connected with a plugging head, the inner wall of the other end of the sleeve is slidably connected with a movable plugging head, the plugging head and the movable plugging head are both provided with an overflow hole, the overflow hole is used for installing an overflow pipe, one end of the overflow pipe is installed in the movable plugging head, and the other end extends out of the anchor cable hole, a cement storage space is formed between the plugging head, the movable plugging head and the sleeve, a reserved hole is arranged on the outer circumferential surface of the sleeve, the reserved hole is connected with the cement storage space, a pulling piece is arranged on the movable plugging head, which is used to pull the movable plugging head to move along the length direction of the sleeve, so that the cement in the cement storage space is squeezed out of the reserved hole to flow out to the space between the sleeve and the anchor cable hole for solidification.

[0006] Compared with the prior art, the beneficial effects of the present invention are:

[0007] The installation position of the sleeve is adjusted according to the length of the first grouting anchoring required, so that when the movable plug is driven to move along the length direction of the sleeve to squeeze out the cement mortar in the cement storage space, the distance between the movable plug and the bottom wall of the anchor hole is the length of the first anchoring grouting. Specifically, when the anchor hole is grouting and anchoring for the first time through the utility model, the movable plug is first moved along the length direction of the sleeve through the pulling member. When the movable plug moves, the cement mortar in the cement storage space is squeezed out evenly through the multiple reserved holes on the sleeve, so that the cement mortar flows out evenly between the sleeve and the wall of the anchor hole, and the sleeve and the anchor hole are solidified together, so as to achieve the effect of sealing the anchor hole, and then grouting is injected into the anchor hole through the grouting pipe. When the cement mortar injection height reaches the overflow hole and continues to be injected, the excess cement mortar enters the overflow pipe and overflows from the other end of the overflow pipe The anchor hole is reminded that the length of the first grouting anchoring has reached the design requirement.

[0008] As a preferred embodiment of the utility model, wire holes are respectively provided on the sealing head and the movable plugging head, and the pulling member includes a pulling wire passed through the two wire holes, one end of the pulling wire is fixedly connected to a limit card, the limit card is located on a side of the movable plugging head away from the sealing head, and the other end of the pulling wire extends out of the anchor hole.

[0009] In this solution, the pulling wire is pulled out of one end of the anchor hole by external force, and when the pulling wire is pulled, it drives the limit card to push the movable plug to move along the length direction of the casing. When the movable plug moves, the cement mortar in the cement storage space is evenly squeezed out through the multiple reserved holes on the casing, so that the cement mortar evenly flows out to between the casing and the wall of the anchor hole, and the casing and the anchor hole are solidified together.

[0010] As a preferred embodiment of the utility model, the plugging head and the movable plugging head are both provided with wiring holes and grouting holes, the wiring holes are used for passing the steel strands, and the grouting holes are used for installing grouting pipes to grout into the anchor holes.

[0011] As a preferred embodiment of the utility model, a guide cap is provided at one end of the anchor cable away from the anchor, and a plurality of tightening rings and wire rings are alternately provided at one end of the anchor cable close to the guide cap along its own length direction, the tightening rings are used to tighten the multiple steel strands inward, and the wire rings are used to stretch the multiple steel strands outward.

[0012] In the present solution, the tightening ring is used to tighten the multiple steel strands inward, and the wire ring is used to stretch the multiple steel strands outward, so that the diameter of the anchor cable where the tightening ring is installed is smaller than other parts, thereby increasing the contact area between the anchor cable and the cement mortar, which is beneficial for the anchor cable to be better combined with the cement mortar, and can reduce the possibility of the anchor cable loosening, making the anchor cable more stable when buried in the cement mortar.

[0013] As a preferred embodiment of the utility model, there are multiple reserved holes, which are circumferentially arranged on the outer circumferential surface of the sleeve, and the distance between the reserved holes and the wall of the anchor hole is less than 10 mm.

[0014] In this solution, the provision of the reserved hole allows cement to flow out of the reserved hole to between the casing and the wall of the anchor hole, thereby solidifying the casing and the anchor hole together, thereby achieving a blocking effect on the anchor hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the overall prestressed anchor cable structure of the utility model.

[0016] Figure 2 The utility model is a schematic diagram of the connection between a plugging head, a movable plugging head and a sleeve of a prestressed anchor cable structure.

[0017] Figure 3 The utility model is a structural schematic diagram of a movable plug of a prestressed anchor cable structure.

[0018] Figure 4 It is a structural schematic diagram of a sleeve of a prestressed anchor cable structure of the utility model.

[0019] The reference numerals include: 1-anchor, 2-anchor cable, 21-steel strand, 22-casing, 23-sealing head, 24-movable plug, 25-overflow hole, 26-wire hole, 27-pulling piece, 271-limiting card, 272-pulling wire, 28-cement storage space, 29-reserved hole, 30-wiring hole, 31-grouting hole, 32-guide cap, 33-tightening ring, 34-wire ring, 35-overflow pipe. DETAILED DESCRIPTION

[0020] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0021] In the description of the present application, the terms "upper", "lower", 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 application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] See also Figure 1 As shown, the present application discloses a prestressed anchor cable structure, including an anchor 1 and an anchor cable 2. The anchor cable 2 is fixed at one end of the anchor 1 and is inserted into the anchor cable hole. The anchor cable 2 includes a plurality of steel strands 21. A guide cap 32 is provided at one end of the anchor cable 2 away from the anchor 1. The guide cap 32 is fixed at the end of the plurality of steel strands 21 away from the anchor 1, and is used to connect the plurality of steel strands 21 while increasing the weight of one end of the anchor cable 2, which is conducive to inserting the anchor cable 2 into the anchor cable hole. The end of the anchor cable 2 close to the guide cap 32 is connected along its own length. A plurality of tightening rings 33 and wire-hanging rings 34 are alternately provided at intervals in the degree direction. The tightening rings 33 are used to tighten the plurality of steel strands 21 inwardly, and the wire-hanging rings 34 are used to stretch the plurality of steel strands 21 outwardly, so that the diameter of the anchor cable 2 at the position where the tightening ring 33 is installed is smaller than that at other positions, thereby increasing the contact area between the anchor cable 2 and the cement mortar, which is beneficial for the anchor cable 2 to be better combined with the cement mortar, and can reduce the possibility of the anchor cable 2 loosening, so that the anchor cable 2 is more stable when buried in the cement mortar.

[0023] See also Figures 1 to 4 As shown, a plurality of steel strands 21 are commonly sheathed with a sleeve 22 on their outer sides. The sleeve 22 is made of polyvinyl chloride material and can be installed on the outer sides of the plurality of steel strands 21 in a bundling manner. A plugging head 23 is fixedly connected to the inner wall of the sleeve 22 at one end close to the anchor hole, and a movable plug 24 is slidably connected to the inner wall of the other end of the sleeve 22. A wiring hole 30 and a grouting hole 31 are provided on the plugging head 23 and the movable plug 24. The wiring hole 30 is used for threading the steel strands 21, and the grouting hole 31 is used for installing a grouting pipe (not shown) to inject grout into the anchor hole. One end of the grouting pipe is close to the guide cap 32, and the other end extends out of the anchor hole.

[0024] See also Figure 2 and Figure 4As shown, the plugging head 23 and the movable plugging head 24 are both provided with overflow holes 25, and the overflow holes 25 are used to install the overflow pipe 35. One end of the overflow pipe 35 is installed in the movable plugging head 24, and the other end extends out of the anchor hole. A cement storage space 28 is formed between the plugging head 23, the movable plugging head 24 and the sleeve 22 for storing cement mortar (plastic state). A reserved hole 29 is provided on the outer circumferential surface of the sleeve 22, and the reserved hole 29 is connected to the cement storage space 28. There are multiple reserved holes 29, and they are circumferentially arranged on the outer circumferential surface of the sleeve 22. The distance from the reserved hole 29 to the wall of the anchor hole is less than 10 mm, so that the cement When the cement mortar flows out from the reserved hole 29 to between the casing 22 and the wall of the anchor hole, the casing 22 and the anchor hole can be solidified together to achieve a sealing effect on the anchor hole. At this time, grouting is injected into the anchor hole through the grouting pipe. When the injection height of the cement mortar reaches the overflow hole 25 and overflows from the overflow pipe 35, the length of the first grouting anchoring reaches the design requirement (the installation position of the casing 22 is adjusted according to the length of the first grouting anchoring. When the movable plug 24 moves along the length direction of the casing 22 to squeeze out the cement mortar in the cement storage space 28, the distance between the movable plug 24 and the bottom wall of the anchor hole is the length of the first anchoring grouting).

[0025] See also Figure 2 and Figure 3 As shown, a pulling member 27 is provided on the movable plug 24, which is used to pull the movable plug 24 to move along the length direction of the casing 22, so as to squeeze the cement in the cement storage space 28 out of the reserved hole 29 to flow out to the space between the casing 22 and the anchor hole for solidification. Wire holes 26 are respectively provided on the plugging head 23 and the movable plug 24, and the pulling member 27 includes a pulling wire 272 passed through the two wire holes 26, one end of the pulling wire 272 is fixedly connected to a limit card 271, and the limit card 271 is cross-shaped. The limit card 271 is located on the side of the movable plug 24 away from the plugging head 23, and the other end of the pulling wire 272 extends out of the anchor hole. Specifically, by pulling one end of the pulling wire 272, the pulling wire 272 pulls the limit card 271 to push the movable plug 24 to move along the length direction of the casing 22, so that the cement in the cement storage space 28 can be squeezed out from the reserved hole 29 to flow between the casing 22 and the anchor hole to solidify, thereby sealing the anchor hole.

[0026] When the prestressed anchor cable structure of the present invention is in use, the installation position of the sleeve 22 is adjusted according to the length of the first grouting anchoring required, so that when the movable plug 24 is driven to move along the length direction of the sleeve 22 to squeeze out the cement mortar in the cement storage space 28, the distance between the movable plug 24 and the bottom wall of the anchor cable hole is the length of the first anchoring grouting. Specifically, when the anchor cable hole is grouting and anchoring for the first time through the present invention, the pulling wire 272 is first pulled out of one end of the anchor cable hole by external force, and when the pulling wire 272 is pulled, it drives the limit card 271 to push the movable plug 24 along the length direction of the sleeve 22 When the movable plug 24 moves, the cement mortar in the cement storage space 28 is evenly squeezed out through the multiple reserved holes 29 on the casing 22, so that the cement mortar evenly flows out to between the casing 22 and the wall of the anchor hole, solidifies the casing 22 and the anchor hole together, and achieves a sealing effect on the anchor hole. Subsequently, grouting is injected into the anchor hole through the grouting pipe. When the cement mortar injection height reaches the overflow hole 25 and continues to be injected, excess cement mortar enters the overflow pipe 35 and overflows from the other end of the overflow pipe 35 out of the anchor hole, thereby reminding the staff that the first grouting anchoring length has reached the design requirement.

[0027] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A prestressed anchor cable structure, comprising an anchor and an anchor cable, wherein the anchor cable is fixed at one end of the anchor cable and passed through an anchor cable hole, and the anchor cable comprises a plurality of steel strands, characterized in that: A sleeve is commonly sheathed on the outer sides of the multiple steel strands, a sealing head is fixedly connected to the inner wall of the sleeve near one end of the anchor hole, and a movable plug is slidably connected to the inner wall of the other end of the sleeve, and overflow holes are provided on the sealing head and the movable plug, and the overflow hole is used to install an overflow pipe, one end of the overflow pipe is installed in the movable plug, and the other end extends out of the anchor hole, and a cement storage space is formed between the sealing head, the movable plug and the sleeve, and a reserved hole is provided on the outer circumferential surface of the sleeve, and the reserved hole is connected with the cement storage space, and a pulling piece is provided on the movable plug for pulling the movable plug to move along the length direction of the sleeve, so as to squeeze the cement in the cement storage space out of the reserved hole to flow out to the space between the sleeve and the anchor hole for solidification.

2. The prestressed anchor cable structure according to claim 1, characterized in that: The sealing head and the movable plug are respectively provided with wire holes, the pulling member comprises a pulling wire passed through the two wire holes, one end of the pulling wire is fixedly connected to a limit card, the limit card is located on a side of the movable plug away from the sealing head, and the other end of the pulling wire extends out of the anchor hole.

3. The prestressed anchor cable structure according to claim 1, characterized in that: The plugging head and the movable plugging head are both provided with wiring holes and grouting holes. The wiring holes are used for passing the steel strands, and the grouting holes are used for installing grouting pipes to inject grout into the anchor cable holes.

4. The prestressed anchor cable structure according to claim 1, characterized in that: A guide cap is provided at one end of the anchor cable away from the anchor, and a plurality of tightening rings and wire rings are alternately provided along its length direction at one end of the anchor cable close to the guide cap. The tightening rings are used to tighten the multiple steel strands inward, and the wire rings are used to stretch the multiple steel strands outward.

5. The prestressed anchor cable structure according to claim 1, characterized in that: There are a plurality of the reserved holes, which are circumferentially arranged on the outer circumferential surface of the sleeve, and the distance between the reserved holes and the wall of the anchor hole is less than 10 mm.

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