An expandable anchor structure and method of construction thereof

Abstract

The application discloses an expandable anchor cable structure and a construction method thereof. The anchor cable structure comprises a steel strand, an anchoring mechanism, a developing mechanism and a grouting pipe. The anchoring mechanism comprises a fixed part, a movable part and the developing mechanism. The fixed part is fixedly installed on the steel strand. The movable part is slidably arranged on the steel strand. The fixed part is provided with a first through hole. The movable part is provided with a second through hole. Distances from each point or line on the inner wall of the second through hole to the central axis of the second through hole are not completely equal. The developing mechanism is movably connected with the movable part. The movable part close to the fixed part can drive the developing mechanism to develop. The grouting pipe can pass through the first through hole and the second through hole. The end of the grouting pipe is provided with a locking part matched with the shape of the second through hole. The anchor cable structure develops outwardly through the developing mechanism, the contact area of the anchoring mechanism to the soil body is increased, and the probability that the anchoring mechanism is pulled out of the anchor hole is reduced. Moreover, the steel strand is elevated through the anchoring mechanism, and the steel strand can be prevented from falling to the inner wall of the anchor hole. The application relates to the technical field of slope reinforcement.

Description

Technical Field

[0001] This application relates to the field of slope reinforcement technology, and in particular to an expandable anchor cable structure and its construction method. Background Technology

[0002] Anchor cables are a common engineering structure used to reinforce slopes. They are formed by injecting cement grout or cement mortar into the anchoring section of high-strength steel strands. After the grout material reaches the designed tension strength, a core jack is used to tension the steel strands and apply a certain prestress. The soil of the slope is further compressed under the force of the anchor cables, thereby increasing the compactness of the soil and improving the stability of the slope.

[0003] The anchor cable structure mainly consists of an anchor head, steel strands, and anchoring components. After prestressing is applied to the steel strands, the outer side of the steel strands is fixed to the slope surface through the anchoring components, while the anchor head on the other side is anchored in the stable slope within the sliding surface. Under the action of external prestressing equipment, the anchor cable structure tightens, directly generating anti-sliding resistance on the sliding surface. The application of prestress increases the anti-sliding frictional resistance, keeping the structural surface in a compressed state, thus improving the overall stability and anti-sliding properties of the slope.

[0004] However, in actual construction, it has been found that current anchors are cylindrical in shape and mainly rely on the injection of cement grout or cement mortar to anchor to the soil. However, they still carry the risk of loosening under significant anchoring forces. Anchor cables typically require the installation of plastic isolation supports every two meters along the steel strand. The anchor cable is then manually placed into the anchor hole using a multi-person delivery method. The purpose of the plastic isolation supports is to elevate the steel strand to reduce its bending within the anchor hole, preventing the steel strand from straightening again during subsequent tensioning and generating lateral forces on the concrete. However, the plastic isolation supports can rub against the soil inside the anchor hole, which is inconvenient for construction and can also loosen the soil inside the anchor hole, affecting the final anchoring effect. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an expandable anchor cable structure that can improve the anchoring stability of the anchor cable, can elevate the steel strand in the anchor hole, and facilitates construction.

[0006] This application also proposes a construction method for the aforementioned expandable anchor cable structure.

[0007] The expandable anchor cable structure according to a first aspect embodiment of this application includes:

[0008] Steel strand;

[0009] An anchoring mechanism includes a fixing member, a movable member, and a deployment mechanism. The fixing member is fixedly installed on the steel strand, and the movable member is slidably disposed on the steel strand. The fixing member has a first through hole, and the movable member has a second through hole. The distances from various points or lines on the inner wall of the second through hole to the central axis of the shape of the second through hole are not completely equal. The deployment mechanism is movably connected to the movable member, and the movable member can drive the deployment mechanism to deploy when it is close to the fixing member.

[0010] A grouting pipe is provided at the end of the grouting pipe, which can pass through the first through hole and the second through hole. The end of the grouting pipe is provided with a locking member that is adapted to the shape of the second through hole. When the locking member is rotated to a state adapted to the second through hole, it can pass through the second through hole. The locking member can also pass through the first through hole.

[0011] The expandable anchor cable structure according to the embodiments of this application has at least the following beneficial effects: by expanding outward through the deployment mechanism, the contact area between the anchoring mechanism and the soil can be increased, reducing the probability of the anchoring mechanism coming out of the anchor hole under tension; and by raising the steel strand through the anchoring mechanism, it can be prevented from falling to the inner wall of the anchor hole.

[0012] According to some embodiments of this application, both the fixing member and the movable member are provided with slots for engaging the steel strand, and the slots of the fixing member are provided with limiting structures to clamp the steel strand.

[0013] According to some embodiments of this application, the fastener and the movable part are provided with multiple slots arranged in a circumferential array, and the steel strands are multiple and are respectively inserted into each of the slots.

[0014] According to some embodiments of this application, the deployment mechanism includes a first link, a second link, and a wing plate. The first link is hinged to the fixed member, the second link is hinged to the movable member, and both the first link and the second link are hinged to the wing plate. The movable member, when close to the fixed member, can drive the first link and the second link to rotate and push the wing plate outward.

[0015] According to some embodiments of this application, there are two first links and two second links, with the two first links arranged in parallel to each other and the two second links arranged in parallel to each other.

[0016] According to some embodiments of this application, the lengths of the first link and the second link are not equal, and the wing plate forms an acute angle with the central axis of the movable component after it is fully extended.

[0017] According to some embodiments of this application, there are multiple deployment mechanisms that are arranged in a circular array around the central axis of the movable component.

[0018] According to some embodiments of this application, the second through hole includes a circular hole and a square hole connected to each other, and the locking member includes a cylindrical portion adapted to the circular hole and a locking portion adapted to the square hole; screwing the grouting pipe can cause the locking member to rotate around the circular hole, and when the locking portion rotates to the square hole, the locking member can pass through the second through hole.

[0019] According to some embodiments of this application, both the fixing member and the moving member are frustum-shaped.

[0020] The construction method according to the second aspect of this application, used for constructing the above-mentioned expandable anchor cable structure, includes the following steps:

[0021] The steel strand and the grouting pipe are inserted into each of the anchoring mechanisms. The locking member of the grouting pipe first passes through the first through hole of the fixing member and then through the second through hole of the movable member.

[0022] Arrange the anchoring mechanisms at equal intervals and fix the fixing members to the steel strands;

[0023] The assembled anchor cable and the grouting pipe are placed into the anchor hole;

[0024] Turn on the external grouting equipment to inject mud into the grouting pipe, while slowly pulling the grouting pipe outward;

[0025] During the process of pulling the grouting pipe outward, the locking member abuts against the second through hole of the movable member, driving the movable member closer to the fixed member, and the unfolding mechanism unfolds outward and abuts against the inner wall of the anchor hole.

[0026] Rotate the grouting pipe to rotate the locking member to a position that matches the second through hole, and continue to pull the grouting pipe outward so that the locking member passes through the second through hole;

[0027] As the grouting pipe moves outward, the locking member then passes through the first through hole, and the current anchoring mechanism is deployed.

[0028] The grouting pipe continues to move outward, driving the next anchoring mechanism to unfold, until all the anchoring mechanisms have been unfolded, and the grouting pipe is pulled out of the anchor hole;

[0029] Wait for the mud in the anchor hole to solidify; the anchoring is now complete.

[0030] The construction method according to the embodiments of this application has at least the following beneficial effects: while grouting is being carried out using the grouting pipe, each anchoring mechanism can be triggered sequentially and deployed during the process of pulling it outward, making the construction process simple and efficient.

[0031] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and form part of the specification. They are used together with the embodiments disclosed in this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0033] Figure 1 This is a three-dimensional view of the expandable anchor cable structure according to the first aspect of this application;

[0034] Figure 2 This is a schematic diagram of the expandable anchor cable structure after deployment, according to the first aspect embodiment of this application;

[0035] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0036] Reference numerals: 100-steel strand, 200-anchoring mechanism, 210-fixing component, 211-first through hole, 220-moving component, 221-second through hole, 2211-round hole, 2212-square hole, 230-deployment mechanism, 231-first connecting rod, 232-second connecting rod, 233-wing plate, 240-slot, 300-anchor head. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0038] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0041] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The anchor cable structure mainly consists of an anchor head, steel strands, and anchoring components. After prestressing is applied to the steel strands, the outer side of the steel strands is fixed to the slope surface through the anchoring components, while the anchor head on the other side is anchored in the stable slope within the sliding surface. Under the action of external prestressing equipment, the anchor cable structure tightens, directly generating anti-sliding resistance on the sliding surface. The application of prestress increases the anti-sliding frictional resistance, keeping the structural surface in a compressed state, thus improving the overall stability and anti-sliding properties of the slope.

[0043] However, in actual construction, it has been found that current anchors are cylindrical in shape and mainly rely on the injection of cement grout or cement mortar to anchor to the soil. However, they still carry the risk of loosening under significant anchoring forces. Anchor cables typically require the installation of plastic isolation supports every two meters along the steel strand. The anchor cable is then manually placed into the anchor hole using a multi-person delivery method. The purpose of the plastic isolation supports is to elevate the steel strand to reduce its bending within the anchor hole, preventing the steel strand from straightening again during subsequent tensioning and generating lateral forces on the concrete. However, the plastic isolation supports can rub against the soil inside the anchor hole, which is inconvenient for construction and can also loosen the soil inside the anchor hole, affecting the final anchoring effect.

[0044] In response, this application proposes an expandable anchor cable structure. By expanding outward through the deployment mechanism 230, the contact area between the anchoring mechanism 200 and the soil can be increased, reducing the probability of the anchoring mechanism 200 coming out of the anchor hole under tension. Moreover, by elevating the steel strand through the anchoring mechanism 200, it can be prevented from falling onto the inner wall of the anchor hole.

[0045] In addition, this application also proposes a construction method for the above-mentioned expandable anchor cable structure. While grouting is being carried out using a grouting pipe, each anchoring mechanism 200 can be triggered sequentially and deployed during the process of pulling it outward. The construction process is simple and efficient.

[0046] Reference Figure 1 and Figure 2 The expandable anchor cable structure in the first aspect embodiment of this application includes a steel strand 100, an anchoring mechanism 200, and a grouting pipe. The steel strand 100 primarily bears tensile stress, and its end is fitted with an anchor head 300 for insertion into the soil. The anchoring mechanism 200 is mounted on the steel strand 100 and is used to anchor the soil in the anchor hole. The grouting pipe passes through each anchoring mechanism 200 and is used to inject and solidify grout within the anchor hole.

[0047] Specifically, refer to Figure 3 The anchoring mechanism 200 includes a fixing member 210, a movable member 220, and an unfolding mechanism 230. The fixing member 210 is fixedly installed on the steel strand 100, and the movable member 220 is slidably mounted on the steel strand 100. The fixing member 210 has a first through hole 211, and the movable member 220 has a second through hole 221. It is worth noting that the distances from various points or lines on the inner wall of the second through hole 221 to the central axis of the second through hole 221 are not completely equal, and the second through hole 221 can be elliptical, square, rhomboid, or other irregular shapes. The unfolding mechanism 230 is movably connected to the movable member 220. When the movable member 220 approaches the fixing member 210, it can drive the unfolding mechanism 230 to unfold, thereby contacting the inner wall of the anchor hole to complete the anchoring function.

[0048] The grouting pipe can pass through the first through hole 211 and the second through hole 221. The end of the grouting pipe is provided with a locking member that is adapted to the shape of the second through hole 221. When the locking member is rotated to a state that is adapted to the second through hole 221, it can pass through the second through hole 221 and the locking member can pass through the first through hole 211.

[0049] The working principle of this expandable anchor cable structure is as follows: The locking member at the end of the grouting pipe passes sequentially through the first through hole 211 of the fixed member 210 and the second through hole 221 of the movable member 220. While grouting, the grouting pipe is continuously pulled outward. The locking member abuts against the second through hole 221 and pulls the movable member 220 closer to the fixed member 210, driving the unfolding mechanism 230 to unfold outward. Then, by rotating the grouting pipe, the locking member is rotated to a position that matches the second through hole 221, so that the locking member can pass through the second through hole 221 and finally pass out through the first through hole 211, completing the separation of the grouting pipe from the anchoring mechanism 200.

[0050] Furthermore, both the fixing member 210 and the movable member 220 are provided with slots 240 for engaging the steel strands 100. The slots 240 of the fixing member 210 are provided with limiting structures to securely engage with the steel strands 100. Moreover, there are multiple slots 240 on both the fixing member 210 and the movable member 220, which are arranged in a circumferential array, and there are multiple steel strands 100, each of which is engaged in a different slot 240.

[0051] Specifically, the deployment mechanism 230 includes a first connecting rod 231, a second connecting rod 232, and a wing plate 233. The first connecting rod 231 is hinged to the fixed member 210, the second connecting rod 232 is hinged to the movable member 220, and both the first connecting rod 231 and the second connecting rod 232 are hinged to the wing plate 233. When the movable member 220 approaches the fixed member 210, it can drive the first connecting rod 231 and the second connecting rod 232 to rotate, and push the wing plate 233 outward, thus completing the deployment of the deployment mechanism 230.

[0052] Furthermore, there are two first connecting rods 231 and two second connecting rods 232, with the two first connecting rods 231 arranged parallel to each other and the two second connecting rods 232 arranged parallel to each other. Increasing the number of first connecting rods 231 and second connecting rods 232 can improve the structural stability of the deployment mechanism 230 and reduce the probability of damage to the deployment mechanism 230 under tensile stress during the anchoring process.

[0053] Optionally, the lengths of the first link 231 and the second link 232 are not equal. After the wing plate 233 is fully extended, it forms an acute angle with the central axis of the movable part 220, so that the outwardly folded wing plate 233 can be inserted into the soil inside the anchor hole, further preventing the anchor cable from coming out.

[0054] Furthermore, there are multiple deployment mechanisms 230, which are arranged in a circular array around the central axis of the movable part 220, so that when each deployment mechanism 230 is deployed, each steel strand 100 and grouting pipe can be erected in the center of the anchor hole.

[0055] The second through hole 221 has a specific structure, including a circular hole and a square hole connected to each other. The locking member includes a cylindrical portion that fits into the circular hole and a locking portion that fits into the square hole. Twisting the grouting pipe allows the locking member to rotate around the circular hole, and when the locking portion rotates to the square hole, the locking member can pass through the second through hole 221.

[0056] Furthermore, both the fixing member 210 and the movable member 220 are frustum-shaped. When the anchoring mechanism 200 is placed into the anchor hole, the frustum-shaped fixing member 210 and the movable member 220 can reduce the friction between their outer surfaces and the inner wall of the anchor hole, thereby facilitating installation.

[0057] A construction method according to a second aspect embodiment of this application, for constructing the aforementioned expandable anchor cable structure, includes the following steps:

[0058] S100. Insert the steel strand 100 and the grouting pipe into each anchoring mechanism 200. The locking part of the grouting pipe first passes through the first through hole 211 of the fixing part 210, and then passes through the second through hole 221 of the movable part 220.

[0059] S200. Arrange the various anchoring mechanisms 200 at equal intervals and fix the fasteners 210 to the steel strands 100;

[0060] S300. Place the assembled anchor cable and grouting pipe into the anchor hole;

[0061] S400. Activate the external grouting equipment to inject grout into the grouting pipe while slowly pulling the grouting pipe outward;

[0062] S500. During the process of pulling the grouting pipe outward, the locking part abuts against the second through hole 221 of the movable part 220, driving the movable part 220 to approach the fixed part 210, and the unfolding mechanism 230 unfolds outward and abuts against the inner wall of the anchor hole.

[0063] S600. Rotate the grouting pipe to make the locking member rotate to a position that matches the second through hole 221, which means the position where the locking member can pass through the second through hole 221. The grouting pipe continues to be pulled outward so that the locking member passes through the second through hole 221.

[0064] S700. As the grouting pipe moves outward, the locking element then passes through the first through hole 211, and the current anchoring mechanism 200 is fully deployed;

[0065] S800. The grouting pipe continues to move outward, driving the next anchoring mechanism 200 to unfold, until all anchoring mechanisms 200 have unfolded, and the grouting pipe is pulled out of the anchor hole;

[0066] S900. Wait for the mud in the anchor hole to solidify; anchoring is complete.

[0067] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An expandable anchor cable structure, characterized in that, include: Steel strand; An anchoring mechanism includes a fixing member, a movable member, and an unfolding mechanism. The fixing member is fixedly installed on the steel strand, and the movable member is slidably disposed on the steel strand. The fixing member has a first through hole, and the movable member has a second through hole. The distances from various points or lines on the inner wall of the second through hole to the central axis of the second through hole are not completely equal. The unfolding mechanism is movably connected to the movable member, and the movable member, when close to the fixing member, can drive the unfolding mechanism to unfold and abut against the inner wall of the anchor hole. A grouting pipe is provided at the end of the grouting pipe, which can pass through the first through hole and the second through hole. The end of the grouting pipe is provided with a locking member that is adapted to the shape of the second through hole. When the locking member is rotated to a state that is adapted to the second through hole, it can pass through the second through hole. The locking member can also pass through the first through hole. The fixing member and the movable member are both provided with slots for engaging the steel strand, and the slot of the fixing member is provided with a limiting structure to clamp it with the steel strand. Both the fixed component and the movable component have multiple slots arranged in a circular array, and the steel strands are multiple and are respectively inserted into each of the slots; Both the fixed component and the movable component are truncated cone-shaped.

2. The expandable anchor cable structure according to claim 1, characterized in that: The deployment mechanism includes a first link, a second link, and a wing plate. The first link is hinged to the fixed member, the second link is hinged to the movable member, and both the first link and the second link are hinged to the wing plate. The movable member, when close to the fixed member, can drive the first link and the second link to rotate and push the wing plate outward.

3. The expandable anchor cable structure according to claim 2, characterized in that: There are two first links and two second links. The two first links are arranged in parallel with each other, and the two second links are arranged in parallel with each other.

4. The expandable anchor cable structure according to claim 2, characterized in that: The lengths of the first link and the second link are not equal, and the wing plate forms an acute angle with the central axis of the movable part after it is fully extended.

5. The expandable anchor cable structure according to any one of claims 2 to 4, characterized in that: The number of the unfolding mechanisms is multiple, and they are arranged in a circular array around the central axis of the movable component.

6. The expandable anchor cable structure according to claim 1, characterized in that: The second through hole includes a circular hole and a square hole connected to each other. The locking member includes a cylindrical part adapted to the circular hole and a locking part adapted to the square hole. Twisting the grouting pipe can cause the locking member to rotate around the circular hole. When the locking part rotates to the square hole, the locking member can pass through the second through hole.

7. A construction method for an expandable anchor cable structure according to any one of claims 1 to 6, characterized in that, include: The steel strand and the grouting pipe are inserted into each of the anchoring mechanisms. The locking member of the grouting pipe first passes through the first through hole of the fixing member and then through the second through hole of the movable member. Arrange the anchoring mechanisms at equal intervals and fix the fixing members to the steel strands; The assembled anchor cable and the grouting pipe are placed into the anchor hole; Turn on the external grouting equipment to inject mud into the grouting pipe, while slowly pulling the grouting pipe outward; During the process of pulling the grouting pipe outward, the locking member abuts against the second through hole of the movable member, driving the movable member closer to the fixed member, and the unfolding mechanism unfolds outward and abuts against the inner wall of the anchor hole. Rotate the grouting pipe to rotate the locking member to a position that matches the second through hole, and continue to pull the grouting pipe outward so that the locking member passes through the second through hole; As the grouting pipe moves outward, the locking member then passes through the first through hole, and the current anchoring mechanism is deployed. The grouting pipe continues to move outward, driving the next anchoring mechanism to unfold, until all the anchoring mechanisms have been unfolded, and the grouting pipe is pulled out of the anchor hole; Wait for the mud in the anchor hole to solidify; the anchoring is now complete.

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