Large-diameter high-strength steel bar anti-floating anchor rod
By using a large-diameter, high-strength steel anti-buoyancy anchor structure, the problems of large reinforcement and complicated steel cage fabrication in traditional anti-buoyancy piles are solved. This achieves balanced mechanical properties and pull-out bearing capacity, controls pile body cracks, and ensures the integrity and safety of the anti-buoyancy anchor.
Patent Information
- Application Number
- CN202520488351.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Traditional anti-buoyancy piles require a large amount of reinforcement and involve complicated steel cage fabrication. The entire length of the pile is prone to cracking under tension, making it difficult to effectively control the deformation and displacement of the anti-buoyancy plate, thus posing potential quality risks.
The anti-buoyancy anchor structure adopts a large-diameter high-strength steel bar, which includes tensile main bars, positioning auxiliary bars and concrete layer. A protective layer is set on the outside of the tensile main bars. High-strength precision rolled threaded steel bars are used instead of ordinary threaded steel bars, eliminating the need for steel cage fabrication. The position of the tensile main bars is determined by the positioning auxiliary bars, and prestress is applied in the concrete layer to control pile cracks.
It achieves balanced mechanical properties, reduces reinforcement requirements, avoids pile cracks, improves pull-out bearing capacity, controls pile deformation, and ensures the integrity and safety of the anti-buoyancy anchor.
Smart Images
Figure CN223907488U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to anti -floating anchor rod technical field, especially in a big diameter high -strength steel bar anti -floating anchor rod. BACKGROUND
[0002] With the continuous development of urbanization, the ground space use rate is nervous, the trend of deep underground space development is more and more obvious. In deep underground space, as the traditional uplift component, the use frequency of anti -floating pile is relatively high, and the traditional anti -floating pile is mainly composed of pile body and steel reinforcement cage. The pile body is a concrete structure, usually round, and the length is determined according to the geological condition and the size of buoyancy. The steel reinforcement cage is arranged in the pile body, and is usually composed of longitudinal stress reinforcement and structural reinforcement. When the underground water level rises and generates buoyancy, the buoyancy is transmitted to the pile body through the longitudinal stress reinforcement, and the whole pile body is subjected to upward tension and is in tension state.
[0003] The traditional anti -floating pile has the problems of large reinforcement amount, long length and complicated steel reinforcement cage manufacturing steps, and the whole pile is in tension due to the full-length bonding of the steel reinforcement cage and the pile body, which can cause cracks in the pile body. At the same time, the traditional anti -floating pile cannot apply prestress, which makes it difficult to effectively control the deformation displacement of the anti -floating plate after the generation of buoyancy, and is easy to cause the deformation of underground structure. UTILITY MODEL CONTENT
[0004] The utility model discloses a big diameter high -strength steel bar anti -floating anchor rod, solve the problem that traditional anti -floating pile has large reinforcement amount, and the steel reinforcement cage manufacturing step is complicated, and the whole length of the pile body is easy to produce crack.
[0005] The utility model discloses a big diameter high -strength steel bar anti -floating anchor rod, solve the problem that traditional anti -floating pile has large reinforcement amount, and the steel reinforcement cage manufacturing step is complicated, and the whole length of the pile body is easy to produce crack.
[0006] A big diameter high -strength steel bar anti -floating anchor rod, including tensioning main reinforcement, positioning auxiliary muscle and concrete layer, the tensioning main reinforcement is evenly spaced along the inside circumferential position of positioning auxiliary muscle, the positioning auxiliary muscle is along the length direction of tensioning main reinforcement, and the outside of tensioning main reinforcement is provided with a protective layer, the positioning auxiliary muscle is arranged in the concrete layer, and at least part of the end of tensioning main reinforcement is arranged in the concrete layer.
[0007] Based on the above-mentioned big diameter high -strength steel bar anti -floating anchor rod structure, the tensioning main reinforcement is high -strength finish rolling screw bar, and the positioning auxiliary muscle is ordinary steel bar.
[0008] Based on the above-mentioned big diameter high -strength steel bar anti -floating anchor rod structure, the structure of positioning auxiliary muscle is circular structure, and the diameter is not less than 20mm, and the spacing of adjacent positioning auxiliary muscle is not less than 1000mm.
[0009] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, the tensile main reinforcement is provided as three, and the central angle of adjacent tensile main reinforcement is 120°.
[0010] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod, characterized in that the protective layer is an isolation sheath, and the size of the isolation sheath is not less than the size of the tensile main reinforcement, so that the tensile main reinforcement can be inserted into the isolation sheath.
[0011] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, the lower end of the tensile main reinforcement is provided with a bearing plate and a locking bolt; the top of the isolation sheath is provided with a locking plate and an anchoring plate; the centers of the bearing plate, the locking plate and the anchoring plate are all provided with threaded holes for cooperation with the tensile main reinforcement.
[0012] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, the bottom position of the isolation sheath is in contact with the bearing plate, the bottom position of the locking plate is in contact with the isolation sheath, and water stop rings are arranged at both ends of the isolation sheath.
[0013] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, a slow-bonding agent is further arranged in the isolation sheath.
[0014] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, the whole concrete layer is in a cylindrical structure, and the size of the concrete layer is not less than 600 mm.
[0015] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, a first spring is arranged on the end of the bearing plate close to the isolation sheath, a second spring is arranged on the end of the locking plate close to the isolation sheath, and the first spring and the second spring are both sleeved outside the isolation sheath.
[0016] Based on the above-mentioned large-diameter high-strength steel anti-floating anchor rod structure, the whole concrete layer is in a cylindrical structure, and the size of the concrete layer is not less than 600 mm.
[0017] 1、In the present application, the position of the tensile main reinforcement can be determined by the positioning auxiliary reinforcement, the mechanical properties of the whole anti-floating anchor rod are more balanced, and the protective layer arranged outside the tensile main reinforcement can prevent the tensile main reinforcement from being bonded with the concrete layer, facilitate prestress application of the tensile main reinforcement, make the whole length of the pile body be in compression, effectively control the pile body cracks, and ensure the integrity of the whole anti-floating anchor rod.
[0018] 2, This scheme adopts high-strength finished rolled threaded steel instead of ordinary threaded steel, generally adopts 2-3 roots, does not need to make steel reinforcement cage, effectively reduces the reinforcement amount, the diameter and the anti-floating pile are equivalent, and the anti-pulling bearing capacity reaches the level of the anti-pulling pile, the product binds the high-strength finished rolled threaded steel to the positioning auxiliary rib, and a large amount of steel welding and other manufacturing steps are saved. These high-strength finished rolled threaded steels and the pile body concrete are in a non-bonding state, prestress can be applied at the top of the pile, the pile body is in compression throughout the length, and the pile body cracks can be effectively controlled. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 It is a schematic view of the overall structure of the utility model;
[0020] Fig. 2 It is a schematic view of the overall structure of the utility model;
[0021] BRIEF DESCRIPTION OF DRAWINGS: 1, tensioning main reinforcement; 2, positioning auxiliary rib; 3, concrete layer; 4, protective layer; 5, bearing plate; 6, locking bolt; 7, locking plate; 8, anchoring plate; 9, water stop ring; 10, first spring; 11, second spring. DETAILED DESCRIPTION
[0022] All features disclosed in this specification, or all steps of any methods or processes disclosed, may be combined in any manner, except where features or steps are mutually exclusive.
[0023] Any feature disclosed in this specification, unless stated otherwise, can be replaced by any equivalent or similar feature, or any feature with the same function. That is, each feature is only an example of a series of equivalent or similar features.
[0024] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0025] In addition, the terms "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features.
[0026] Embodiment 1
[0027] As Figs. 1-2 shown, the utility model provides a technical scheme:
[0028] A large-diameter high-strength steel anti-floating anchor rod, comprising at least but not limited to a tension main reinforcement 1, a positioning auxiliary reinforcement 2 and a concrete layer 3; the tension main reinforcement 1 is uniformly spaced along the inner side circumferential position of the positioning auxiliary reinforcement 2, the positioning auxiliary reinforcement 2 is arranged along the length direction of the tension main reinforcement 1, and a protective layer 4 is arranged on the outer side of the tension main reinforcement 1; the positioning auxiliary reinforcement 2 is arranged in the concrete layer 3, and at least part of the end of the tension main reinforcement 1 is arranged in the concrete layer 3.
[0029] Based on the above structure, in the scheme, the position of the tension main reinforcement 1 can be determined by arranging the positioning auxiliary reinforcement 2, so that the mechanical properties of the entire anti-floating anchor rod are more balanced, and at the same time, the protective layer 4 is arranged on the outer side of the tension main reinforcement 1, so that the tension main reinforcement 1 does not bond with the concrete layer 3, facilitating prestress application to the tension main reinforcement 1 in the later stage, making the pile body full-length compression, effectively controlling the pile body crack, and ensuring the integrity of the entire anti-floating anchor rod.
[0030] As an example, the tension main reinforcement 1 is a high-strength finished rolled threaded steel bar, and the positioning auxiliary reinforcement 2 is an ordinary steel bar.
[0031] The structure of the positioning auxiliary reinforcement 2 is a circular structure, and the diameter can be selected as 22mm or 25mm, and the spacing between adjacent positioning auxiliary reinforcements 2 is not less than 1000mm.
[0032] Based on the above structure, the high-strength finished rolled threaded steel bar is used to replace the ordinary threaded steel bar in the scheme, and a steel reinforcement cage is not needed, so that the reinforcement amount is effectively reduced, the diameter is equivalent to that of an anti-floating pile, and the anti-floating bearing capacity reaches the level of an anti-floating pile. In the scheme, the high-strength finished rolled threaded steel bar is tied to the positioning auxiliary reinforcement 2, so that a large number of steel welding and other manufacturing steps are saved, and the preparation time of the anti-floating anchor rod can be greatly reduced.
[0033] As an example, the tension main reinforcement 1 is arranged as three, and the central angle of adjacent tension main reinforcements 1 is 120°.
[0034] Based on the above structure, the uniformly arranged tension main reinforcement 1 can ensure the mechanical stability of the anti-floating anchor rod, and in the scheme, the number is arranged as three, but the number can be determined according to the required geological conditions and the anti-floating force.
[0035] As an example, the protective layer 4 can be an isolation sheath, and the size of the isolation sheath is not less than the size of the tension main reinforcement 1, so that the tension main reinforcement 1 can be inserted into the isolation sheath.
[0036] Based on the above structure, when the concrete is poured, the isolation sheath can separate the tension main reinforcement 1 from the concrete, and prestress is applied to the tension main reinforcement 1 after forming, so that the pile body crack can be effectively controlled.
[0037] As an example, the lower end of the tension main reinforcement 1 is provided with a bearing plate 5 and a locking bolt 6; the top of the isolation sheath is provided with a locking plate 7 and an anchoring plate 8; the center of the bearing plate 5, the locking plate 7 and the anchoring plate 8 is provided with a threaded hole for matching the tension main reinforcement 1.
[0038] The bottom of the isolation sheath is in contact with the bearing plate 5, the bottom of the locking plate 7 is in contact with the isolation sheath, and the isolation sheath is provided with a water stop ring 9 at both ends, which can be made of rubber.
[0039] Based on the above structure, the bottom of the tension main reinforcement 1 is sleeved on the bearing plate 5 and the locking nut, the position of the bearing plate 5 is locked by the locking nut, the bottom of the isolation sheath is in contact with the bearing plate 5, and the isolation sheath is in contact with the locking plate 7, in the process of rotating the locking plate 7 downward, the water stop ring 9 at both ends of the isolation sheath is deformed under pressure, forming a closed structure, avoiding the grout entering the inside of the isolation sheath during the grouting process, and hindering the tension main reinforcement 1 from being stressed later.
[0040] As an example, a slow-bonding agent can also be provided in the isolation sheath, so that the plugging caused by the support steel bar entering the concrete due to unexpected circumstances can be avoided.
[0041] As an example, the concrete layer 3 is in a cylindrical structure, and the size of the concrete layer 3 is not less than 600mm, and the diameter of the traditional anti-floating anchor rod is usually 300mm-400mm, while the size of the concrete layer 3 is the maximum size of the anti-floating anchor rod, and the size of the concrete layer 3 is set to be larger, so that it can have better anti-floating effect.
[0042] As an example, a first spring 10 is provided on the end of the bearing plate 5 close to the isolation sheath, and a second spring 11 is provided on the end of the locking plate 7 close to the isolation sheath, and the first spring 10 and the second spring 11 are sleeved outside the isolation sheath.
[0043] Based on the above structure, by providing the first spring 10 and the second spring 11 on the bearing plate 5 and the locking plate 7, the stress state of the anchor rod can be adjusted, the deformation can be compensated, and the load fluctuation can be buffered, so as to improve the adaptability and safety of the anti-floating system.
[0044] The preparation process of the present scheme is as follows:
[0045] Reinforcement manufacturing: high-strength finished rolled threaded steel is provided with a protective sleeve or a slow-bonding agent, and the bottom of the steel is provided with a bearing plate 5, and the protective sleeve or the slow-bonding agent is arranged above the bearing plate 5. The manufactured steel is bound to the positioning auxiliary rib 2, which is usually circular, and one rib is arranged at an interval of 1000mm.
[0046] Lowering the reinforcing steel: adopt the drilling equipment to form the hole, the hole diameter is not less than 600mm, then lower the reinforcing steel, place the reinforcing steel at the bottom of the anchor hole.
[0047] Grouting, pouring: grouting or pouring concrete in the anchor hole, make the anchor hole fill the cement grouting body or concrete.
[0048] Applying prestress: after the strength of the anchoring body reaches the design requirement, install the prestress device at the top of the anchor hole, apply the prestress to the head of the reinforcing steel in turn, make the whole length of the anchor rod anchoring body be compressed.
[0049] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement etc. made in the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A large-diameter, high-strength steel anti-buoyancy anchor rod, characterized in that: It includes a main tension bar, a positioning auxiliary bar, and a concrete layer; the main tension bars are evenly spaced along the inner circumferential position of the positioning auxiliary bars, the positioning auxiliary bars are arranged along the length direction of the main tension bars, and a protective layer is provided on the outer side of the main tension bars; the positioning auxiliary bars are arranged in the concrete layer, and at least a portion of the ends of the main tension bars are arranged in the concrete layer.
2. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 1, characterized in that: The tensile main reinforcement is high-strength precision-rolled threaded steel bar, and the positioning auxiliary reinforcement is ordinary steel bar.
3. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 2, characterized in that: The positioning auxiliary ribs are circular with a diameter of not less than 20 mm, and the spacing between adjacent positioning auxiliary ribs is not less than 1000 mm.
4. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 3, characterized in that: The tensile main reinforcement is set to 3 bars, and the central angle between adjacent tensile main reinforcement bars is 120°.
5. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 4, characterized in that: The protective layer is an isolation sleeve, and the size of the isolation sleeve is not smaller than the size of the tension main reinforcement, so that the tension main reinforcement can be inserted into the isolation sleeve.
6. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 5, characterized in that: The lower end of the main tensile reinforcement is provided with a bearing plate and a locking bolt; the top of the isolation sleeve is provided with a locking plate and an anchoring plate; the center of the bearing plate, the locking plate and the anchoring plate are all provided with threaded holes for the main tensile reinforcement to mate with.
7. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 6, characterized in that: The bottom of the isolation sleeve is in contact with the support plate, the bottom of the locking plate is in contact with the isolation sleeve, and water-stop rings are provided at both ends of the isolation sleeve.
8. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 7, characterized in that: The isolation sheath also contains an adhesive retarder.
9. A large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 8, characterized in that: The concrete layer is a cylindrical structure, and the dimensions of the concrete layer are not less than 600mm.
10. The large-diameter high-strength steel anti-buoyancy anchor bolt as described in claim 9, characterized in that: A first spring is provided on the end of the bearing plate near the isolation sleeve, and a second spring is provided on the end of the locking plate near the isolation sleeve. Both the first spring and the second spring are sleeved on the outside of the isolation sleeve.