Pressure type anti-floating anchor rod capable of rapidly applying prestress
By using a pressure-type anti-buoyancy anchor bolt with rapid prestressing and a torsion-shear type high-strength bolt design, the problems of high construction difficulty and difficulty in prestress control of existing anti-buoyancy anchor bolts are solved. This achieves rapid prestressing, simplifies construction, reduces costs, and improves waterproof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-10
AI Technical Summary
Existing anti-buoyancy anchors are difficult and costly to construct in bedrock, and the quality of prestressing is not easy to control. The construction period is also long, making it difficult to meet the anti-buoyancy design requirements.
A pressure-type anti-buoyancy anchor bolt with rapid prestressing is adopted. Through the design of anchor head assembly and torsion-shear type high-strength bolt, prestress is rapidly applied directly to the foundation at the bottom of the building. The anchor bolt assembly includes an anchor head assembly, an anchor bolt assembly, and a bolt head. Taking advantage of the characteristics of torsion-shear type high-strength bolt, the material strength at the connection between the sprite head and the bolt head is designed to be lower than that of the sprite head and the bolt head, thereby controlling the quality of prestressing application.
It enables rapid application of prestress, simplifies construction procedures, reduces construction difficulty, improves waterproof performance, avoids anchor cracks, and reduces project costs.
Smart Images
Figure CN224106401U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of building engineering anti floating construction, more particularly to a pressure type anti floating anchor rod of quick prestress application. BACKGROUND
[0002] When the structural deadweight and the counterweight mode such as building overburden cannot satisfy the water buoyancy of the basement, other water floating resistance measures need to be taken to ensure the stability of the basement. The existing foundation anti floating technical measures include uplift pile anti floating and anti floating anchor rod anti floating. The uplift pile anti floating has a wide range of application and can be used in various foundation environments, and is mostly used in soft soil foundation. The anti floating anchor rod is mostly used in bedrock foundation, and the bearing capacity of the bedrock is relatively high. Generally, a shallow foundation can meet the requirement of foundation bearing capacity, and the structure does not meet the anti floating requirement, so anti floating measures need to be taken. However, it is difficult to use pile machine to form a hole in the bedrock, and special requirements are needed for the pile machine. Therefore, rotary digging pile machines and other pile machine equipment are needed to form a hole, which has certain limitations. Moreover, the cost of the uplift pile anti floating is relatively high, and the construction period is long. Therefore, the pile anti floating is not generally used in the bedrock. The current "building engineering anti floating technical standard" (JGJ476-2019) clearly stipulates the crack design of the anchoring body of the anti floating anchor rod. For the engineering with the anti floating design level of grade A, no tensile stress should be generated in the anchoring body under the standard combination of load effects. For the engineering with the anti floating design level of grade B, the tensile stress in the anchoring body should not be greater than the axial tensile strength of the anchoring body under the standard combination of load effects. According to the above provisions, the anti floating anchor rod should not have cracks during the use stage. The prestressed anti floating anchor rod can meet the above requirements. By applying prestress, the anchoring body maintains a compression state under the action of water buoyancy and does not generate cracks.
[0003] However, the traditional anti floating anchor rod needs to apply prestress to the unbonded steel strand after the anchoring body reaches a certain strength, needs to install a specific prestress device, has a long construction period, and the quality of the prestress application is not easy to control. Moreover, the engineering cost is relatively high.
[0004] Therefore, there is an urgent need for an anti floating anchor rod that can quickly apply prestress and control the quality of the prestress application. UTILITY MODEL CONTENTS
[0005] The utility model provides a pressure type anti floating anchor rod of quick prestress application, which quickly applies prestress to the anchor rod assembly anchored in the foundation of the building bottom through the structural setting of the anchor rod assembly and can efficiently control the quality of the prestress application. The utility model solves the technical problems by adopting the technical scheme of a pressure type anti floating anchor rod of quick prestress application, which can quickly apply prestress to the rod body and comprises an anchor head assembly, an anchor rod assembly and a rod head.
[0006] The anchor head assembly comprises a bolt fastener and a first backing plate, one end of the anchor rod assembly is connected with the bolt fastener through the first backing plate to apply pre-stress on the anchor rod assembly through the bolt fastener, the other end of the anchor rod assembly is connected with the rod head, and both ends of the anchor rod assembly are provided with grout stoppers to prevent external liquid from corroding the anchor rod assembly.
[0007] Preferably, the bolt fastener comprises a torsional shear type high-strength bolt and a nut.
[0008] The nut is matched with the torsional shear type high-strength bolt, one end of the torsional shear type high-strength bolt is a torx head, the other end of the torsional shear type high-strength bolt is a bolt head connected with the anchor rod assembly, the material strength at the connection between the torx head and the bolt head is less than the strength of the torx head and the strength of the bolt head, and the minimum force borne by the material at the connection between the torx head and the bolt head when yielding is equal to the designed pre-stress of the anchor rod assembly.
[0009] Preferably, the anchor rod assembly comprises a pressure block, an anchor rod body and a pouring part.
[0010] The pressure block is arranged in abutment with the first backing plate, one end of the anchor rod body is connected with the bolt fastener through the pressure block, the pouring part is poured to cover the outside of the anchor rod body, the pressure block is connected with the pouring part, a second backing plate is arranged between the pouring part and the rod head, and the other end of the anchor rod body is connected with the rod head through the second backing plate.
[0011] Preferably, not less than three centering supports are uniformly and spacedly arranged in the pouring part, the centering supports are connected with the anchor rod body and can position the position of the anchor rod body.
[0012] Preferably, the anchor rod body comprises a corrugated pipe, a threaded steel and a protective layer.
[0013] The corrugated pipe is sleeved on the threaded steel, the gap between the corrugated pipe and the threaded steel is provided with the protective layer to avoid corrosion, one end of the threaded steel is connected with the bolt fastener through the first backing plate, the other end of the threaded steel is connected with the rod head through the second backing plate, and the length of the threaded steel is greater than the length of the corrugated pipe.
[0014] Preferably, both ends of the corrugated pipe are connected with the sides opposite to the first backing plate and the second backing plate respectively through the grout stoppers to seal the corrugated pipe.
[0015] Preferably, the pressure block comprises a spiral steel and post-poured concrete, the spiral steel is arranged around the end of the anchor rod body close to the first backing plate, and the post-poured concrete is poured to wrap the spiral steel.
[0016] The utility model discloses the beneficial effect is:
[0017] The utility model discloses a quick pressure type anti -floating anchor rod of prestressed force of exerting, and its through the anchor head subassembly to the anchor rod subassembly of anchoring in the building bottom ground is quick to exert prestressed force to the anchoring body under the action of water buoyancy can maintain the compressed state, and no crack is produced. Moreover, through the anchor head subassembly makes full use of the feature of torsional shear type high -strength bolt, and the material strength of the connecting place of the plug head and bolt head is designed to be less than the strength of plug head and the strength of bolt head, so that the plug head of torsional shear type high -strength bolt one end is twisted off after the prestressed force that the bolt fastener exerts reaches the design requirement, thereby the exertion quality of prestressed force is controlled efficiently, and the exertion of prestressed force does not need to carry out through additional prestressed force device, effectively reduces the process of exerting prestressed force, simplifies the construction process, and reduces the construction difficulty. And after the bolt fastener and the backing plate are all constructed, pour the concrete floor again, effectively prevent the seepage of water and further improve the waterproof performance of the pressure type anti -floating anchor rod. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the whole structure schematic diagram of the utility model quick pressure type anti -floating anchor rod of prestressed force of exerting;
[0019] Figure 2 It is the cross section structure schematic diagram of the utility model quick pressure type anti -floating anchor rod of prestressed force of exerting.
[0020] Explanations of the attached drawings: 1, anchor head subassembly;11, torsional shear type high -strength bolt;12, first backing plate;13, second backing plate;
[0021] 2, anchor rod subassembly;21, pressure -bearing block;211, spiral reinforcement;22, anchor rod main body;221, bellows;222, screw thread steel;223, protective layer;23, pouring part;
[0022] 3, rod head;4, centering support;5, stop plug. DETAILED DESCRIPTION
[0023] The utility model is further described below in conjunction with the attached drawings and examples.
[0024] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the utility model to those skilled in the art. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.
[0025] In the description of the embodiments of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.
[0027] As Figure 1 shown, a pressure type anti-floating anchor rod for quickly applying prestress can quickly apply prestress to the rod body, comprising: an anchor head assembly 1, an anchor rod assembly 2 and a rod head 3; the anchor head assembly 1 comprises a bolt fastener and a first pad plate 12, one end of the anchor rod assembly 2 is connected with the bolt fastener through the first pad plate 12 to apply prestress to the anchor rod assembly 2 through the bolt fastener, the other end of the anchor rod assembly 2 is connected with the rod head 3, and the two ends of the anchor rod assembly 2 are provided with grout stoppers 5 to prevent external liquid from corroding the anchor rod assembly 2.
[0028] In this embodiment, the pressure type anti-floating anchor rod is anchored in the foundation at the bottom of the building by penetrating the concrete cushion layer and the waterproof layer of the building bottom plate, and prestress is quickly applied to the anchor rod assembly 2 anchored in the foundation at the bottom of the building through the anchor head assembly 1, so that the anchoring body can maintain a compressed state under the action of water buoyancy and does not produce cracks. Moreover, the prestress applied by the anchor head assembly 1 is easy to control, and the application of prestress does not need to be performed through an additional prestress device, effectively reducing the process of applying prestress, simplifying the construction process and reducing the construction difficulty. The grout stoppers 5 provided at the two ends of the anchor rod assembly 2 further enhance the waterproof performance of the pressure type anti-floating anchor rod, avoiding cracks in the anchoring body under pressure.
[0029] Referring to Figure 1, the bolt fastener comprises a torsional high-strength bolt 11 and a nut; the nut is matched with the torsional high-strength bolt 11, one end of the torsional high-strength bolt 11 is a torx head, the other end of the torsional high-strength bolt 11 is a bolt head connected with the anchor rod assembly 2, the material strength at the connection between the torx head and the bolt head is less than the strength of the torx head and the strength of the bolt head, and the minimum force borne by the material at the connection between the torx head and the bolt head when yielding is equal to the designed prestress of the anchor rod assembly 2.
[0030] In this embodiment, the material strength at the connection between the torx head and the bolt head is designed to be less than the strength of the torx head and the strength of the bolt head by taking full advantage of the characteristics of the torsional high-strength bolt 11, so that the torx head at one end of the torsional high-strength bolt 11 is twisted off when the prestress applied by the bolt fastener reaches the design requirement, thereby efficiently controlling the application quality of the prestress and solving the problem of inconvenient control of the prestress application quality in the prestress application process of the existing anti-floating anchor rod.
[0031] As shown in Figure 1 , the anchor rod assembly 2 comprises a pressure block 21, an anchor rod body 22 and a pouring part 23; the pressure block 21 is arranged in abutment with the first pad plate 12, one end of the anchor rod body 22 passes through the pressure block 21 and is connected with the bolt fastener, the pouring part 23 is poured and covers the outside of the anchor rod body 22, the pressure block 21 is connected with the pouring part 23, the second pad plate 13 is arranged between the pouring part 23 and the rod head 3, and the other end of the anchor rod body 22 passes through the second pad plate 13 and is connected with the rod head 3. The pouring part 23 is uniformly and intervaliy provided with not less than three centering supports 4, the centering supports 4 are connected with the anchor rod body 22 and can position the position of the anchor rod body 22,
[0032] In this embodiment, the pressure type anti-floating anchor rod has the pressure block 21 arranged below the waterproof layer of the building bottom plate, so that the pressure type anti-floating anchor rod can have excellent waterproof performance and avoid penetration corrosion during use. The centering supports 4 uniformly and intervaliy arranged in the pouring part 23 can position and fix the anchor rod body 22, avoiding displacement and movement of the anchor rod body 22 before installation in the concrete pouring of the foundation.
[0033] Further, the anchor rod body 22 comprises a corrugated pipe 221, a threaded steel 222 and a protective layer 223; the corrugated pipe 221 is sleeved on the threaded steel 222, the gap between the corrugated pipe 221 and the threaded steel 222 is provided with the protective layer 223 to avoid corrosion, one end of the threaded steel 222 is connected with the bolt fastener through the first pad plate 12, the other end of the threaded steel 222 is connected with the rod head 3 through the second pad plate 13, and the length of the threaded steel 222 is greater than the length of the corrugated pipe 221. The two ends of the corrugated pipe 221 are connected with the opposite sides of the first pad plate 12 and the second pad plate 13 respectively through the grout stopper 5 to seal the corrugated pipe 221. The pressure bearing block 21 comprises a spiral steel bar 211 and post-poured concrete; the spiral steel bar 211 is arranged around the end of the anchor rod body 22 close to the first pad plate 12, and the post-poured concrete is poured to wrap the spiral steel bar 211.
[0034] In the embodiment, the corrugated pipe 221 is located below the waterproof layer of the building floor, effectively avoiding water seepage in the anchor rod body 22, and the threaded steel 222 passes through the waterproof layer of the building floor and is connected with the bolt fastener, so that the pressure type anti-floating anchor rod can quickly apply prestress to the anchor rod body 22 through the bolt fastener. In a preferred embodiment, the concrete floor is poured after the bolt fastener and the pad plate are both constructed, effectively preventing water seepage from occurring, and further improving the waterproof performance of the pressure type anti-floating anchor rod. Further, the pressure type anti-floating anchor rod is provided with the protective layer 223 in the gap between the corrugated pipe 221 and the threaded steel 222, the protective layer 223 is preferably a protective grease, further protecting the threaded steel 222 between the corrugated pipes 221, avoiding rust of the threaded steel 222 during use, further prolonging the service life of the pressure type anti-floating anchor rod, and ensuring that the anchoring body maintains a pressure state under the action of water buoyancy and does not crack.
[0035] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.
[0036] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A pressure type anti-floating anchor rod capable of quickly applying prestress to a rod body, the pressure type anti-floating anchor rod capable of quickly applying prestress being characterized by, The pressure type anti-floating anchor rod of the quick prestress application comprises an anchor head assembly, an anchor rod assembly and a rod head; The anchor head assembly comprises a bolt fastener and a first pad plate, one end of the anchor rod assembly is connected with the bolt fastener through the first pad plate to apply prestress on the anchor rod assembly by the bolt fastener, the other end of the anchor rod assembly is connected with the rod head, and both ends of the anchor rod assembly are provided with grout stoppers to prevent external liquid from corroding the anchor rod assembly.
2. The fast-applied pre-stressed compression-type anti-floatation anchor rod according to claim 1, characterized in that, The bolt fastener comprises a torsional shear type high-strength bolt and a nut; The nut is matched with the torsional shear type high-strength bolt, one end of the torsional shear type high-strength bolt is a key head, the other end of the torsional shear type high-strength bolt is a bolt head connected with the anchor rod assembly, the material strength at the connection between the key head and the bolt head is less than the strength of the key head and the strength of the bolt head, and the minimum force borne by the material at the connection between the key head and the bolt head when yielding is equal to the designed prestress of the anchor rod assembly.
3. The rapid prestressed pressure-type anti-floating anchor rod according to claim 1, characterized in that, The anchor rod assembly comprises a pressure block, an anchor rod body and a pouring part; The pressure block is arranged against the first pad plate, one end of the anchor rod body is connected with the bolt fastener through the pressure block, the pouring part is poured to cover the outside of the anchor rod body, the pressure block is connected with the pouring part, a second pad plate is arranged between the pouring part and the rod head, and the other end of the anchor rod body is connected with the rod head through the second pad plate.
4. The fast-applied pre-stressed compression-type anti-floatation anchor rod according to claim 3, characterized in that, At least three centering supports are uniformly and interval arranged in the pouring part, the centering supports are connected with the anchor rod body and can position the position of the anchor rod body.
5. The rapid prestressed pressure-type anti-floating anchor rod according to claim 3, characterized in that, The anchor rod body comprises a corrugated pipe, a threaded steel and a protective layer; The corrugated pipe is sleeved on the threaded steel, the gap between the corrugated pipe and the threaded steel is provided with the protective layer to avoid corrosion, one end of the threaded steel is connected with the bolt fastener through the first pad plate, the other end of the threaded steel is connected with the rod head through the second pad plate, and the length of the threaded steel is greater than the length of the corrugated pipe.
6. The fast-applied pre-stressed compression-type anti-floatation anchor rod according to claim 5, characterized in that, Both ends of the corrugated pipe are connected with the sides opposite to the first pad plate and the second pad plate respectively through the grout stoppers to seal the corrugated pipe.
7. The rapid prestressed compression-type anti-floating anchor rod according to claim 3, characterized in that, The pressure block comprises spiral steel and post-poured concrete; the spiral steel is arranged around the end of the anchor rod body close to the first pad plate, and the post-poured concrete is poured to wrap the spiral steel.