A sealing structure, a single-stage anti-buoyancy anchor, and a multi-stage anti-buoyancy anchor.

Abstract

This invention relates to the field of building construction technology, and particularly to a sealing structure, a single-stage anti-buoyancy anchor, and a multi-stage anti-buoyancy anchor. The sealing structure includes a locking component and a sealing component. The locking component is connected to the sealing component via a threaded connection. A sealing sleeve is embedded within the locking component. The locking component is used to lock the steel strand located within the sealing sleeve by compressing the sealing sleeve. The sealing component is used to seal and protect the ends of the steel strand. The sealing structure provided by this invention, through the compression and sealing of the sealing pipe joint, rubber sealing sleeve, sealing expansion clamp, locking nut, and the plastic outer jacket of the unbonded steel strand, forms a closed-loop seal within the entire anchor structure, thereby preventing leakage.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and particularly relates to a sealing structure, a single-stage anti-buoyancy anchor, and a multi-stage anti-buoyancy anchor. Background Technology

[0002] As the world economy enters a stage of rapid development in the 21st century, especially with China's economic growth rate leading the world, my country's infrastructure construction has also achieved unprecedented improvement in mechanisms and technological innovation. With the advent of the era of the country stimulating domestic demand and promoting the large-scale development of infrastructure, pressure-type prestressed anti-buoyancy anchors have established their important position in the field of building foundation engineering in terms of research and development, production, and application.

[0003] Traditional anti-buoyancy anchors come in two types: pressure type and tension type. The base material is ordinary threaded steel bars or precision-rolled threaded steel bars, and sometimes steel strands. Due to the low standards for anti-buoyancy anchors in the early days, their inherent defects gradually became apparent. For example, low anchor pull-out resistance, poor disturbance stability, and weak corrosion and seepage resistance led to safety accidents such as shear fracture, misalignment, cracking, and leakage in the load-bearing beams of building foundations. Based on this, the national standard JGJ476-2019, "Technical Standard for Anti-buoyancy in Building Engineering," was issued, which sets forth corresponding requirements for anchor design and specifies technical requirements for the pull-out resistance, length, corrosion resistance, and seepage resistance of different types of anti-buoyancy anchors in different strata.

[0004] However, existing anchor bolts use welding to fix the steel strands, which can easily lead to leakage during long-term use, causing corrosion of the anchor bolts and affecting their stability. Summary of the Invention

[0005] The purpose of this invention is to provide a sealing structure that addresses the problems mentioned in the background art.

[0006] The present invention is implemented as follows: a sealing structure includes a locking component and a sealing component. The locking component is connected to the sealing component by a threaded connection. A sealing sleeve is embedded in the locking component. The locking component is used to lock the steel strand located in the sealing sleeve by squeezing the sealing sleeve. The sealing component is used to seal and protect the end of the steel strand.

[0007] Preferably, the locking assembly includes a sealing expansion clamp nut and a sealing expansion clamp head. Both the sealing expansion clamp nut and the sealing expansion clamp head are provided with through holes for the steel strand to pass through. The inner side of the sealing expansion clamp nut is provided with threads. The sealing expansion clamp head is sleeved inside the sealing expansion clamp nut, and a sealing sleeve is provided inside the sealing expansion clamp head.

[0008] Preferably, the sealing assembly includes a sealing cover and a sealing tube lower connector. The sealing tube lower connector is a hollow cylindrical structure with openings at both ends, and the sealing cover is a hollow cylindrical structure with an opening at one end. The end of the sealing cover with the opening is fixedly connected to the sealing tube lower connector, and the outer diameter of the end of the sealing tube lower connector away from the sealing cover is provided with an external thread.

[0009] Another objective of this invention is to provide a single-stage anti-buoyancy anchor rod, which includes a fixed-end anchor, a steel strand, a bearing plate, and a guide bracket. One end of the steel strand is fixed by the fixed-end anchor, and the other end is fixed to the bearing plate by the sealing structure described above. The end of the steel strand near the bearing plate is wound with a spiral reinforcement, and the end near the fixed-end anchor is fixed inside the building structure by an outer tube sealing lock head and a water-stop steel plate. The guide bracket is fixedly installed on the end of the bearing plate away from the steel strand.

[0010] Preferably, the end of the guide bracket away from the bearing plate is provided with a tapered guide head.

[0011] Another objective of this invention is to provide a multi-stage anti-buoyancy anchor bolt, comprising a first anchor bolt structure, a third anchor bolt structure, a fixed-end anchor, steel strands, and a guide bracket. The multi-stage anti-buoyancy anchor bolt includes at least one set of third anchor bolt structures, which are connected in series. The first anchor bolt structure is fixedly connected to one end of the series-connected third anchor bolt structures. One end of the steel strand is fixed by the fixed-end anchor, and the other end is fixed to the first and third anchor bolt structures by the sealing structure described above. At least one set of steel strands is fixedly connected to the first anchor bolt structure, and each set of third anchor bolt structures has at least one set of steel strands fixedly connected to it. The guide bracket is fixedly installed at the end of the first anchor bolt structure away from the third anchor bolt structure.

[0012] Preferably, the third anchor structure is the same as the first anchor structure, both including a bearing plate and an isolation bracket. At least one set of sealing structures as described above is fixedly installed on the bearing plate. The outer edge of the bearing plate is provided with a slot for the steel strand to pass through. The isolation bracket is arranged between the steel strands for separating the steel strands.

[0013] Preferably, the end of the guide bracket away from the bearing plate is provided with a tapered guide head.

[0014] The present invention provides a sealing structure that forms a sealed closed loop in the entire anchor bolt structure by pressing and sealing the sealing pipe joint, rubber sealing sleeve, sealing expansion clamp, locking nut and unbonded steel strand plastic jacket, thereby blocking leakage points. Attached Figure Description

[0015] Figure 1 A schematic diagram of a sealing structure provided in an embodiment of the present invention;

[0016] Figure 2 A cross-sectional view of a sealing cover provided in an embodiment of the present invention;

[0017] Figure 3 A cross-sectional view of a sealing tube lower connector provided in an embodiment of the present invention;

[0018] Figure 4 A cross-sectional view of a sealing sleeve provided in an embodiment of the present invention;

[0019] Figure 5 This is a top view of a sealing expansion clamp provided in an embodiment of the present invention;

[0020] Figure 6 A cross-sectional view of a sealing expansion clamp provided in an embodiment of the present invention;

[0021] Figure 7 A cross-sectional view of a sealing expansion nut provided in an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of a single-stage anti-buoyancy anchor provided in an embodiment of the present invention;

[0023] Figure 9 for Figure 8 A magnified view of a section at point A in the middle;

[0024] Figure 10 This is a schematic diagram of a multi-stage anti-buoyancy anchor provided in an embodiment of the present invention;

[0025] Figure 11 for Figure 10 A magnified view of a section at point B in the middle;

[0026] Figure 12 for Figure 10 Sectional view at point AA;

[0027] Figure 13 for Figure 10 Sectional view at point BB;

[0028] Figure 14 for Figure 10 Sectional view at CC;

[0029] Figure 15 for Figure 10 Sectional view at point DD;

[0030] Figure 16 This is a schematic diagram of the structure of the guide bracket provided in an embodiment of the present invention.

[0031] In the attached diagram: 1. Conical guide head; 2. Guide bracket; 3. Central grouting pipe; 4. Sealing cover; 5. Protective medium; 6. Fixed end anchor; 7. Bearing plate; 8. Lower joint of sealing pipe; 9. Sealing sleeve; 10. Sealing expansion clamp; 11. Sealing expansion clamp nut; 12. Spiral reinforcement; 13. Steel strand; 14. Isolation bracket; 15. Outer pipe sealing lock head; 16. Water-stop steel plate; 17. Fixed end anchor; 18. Protective sleeve; 19. Third section anchor structure; 20. Second section anchor structure; 21. First section anchor structure; 22. Transition grouting pipe; 100. Locking assembly; 200. Sealing assembly. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0034] like Figure 1 The diagram shown is a schematic of a sealing structure provided in an embodiment of the present invention. The sealing structure includes a locking component 100 and a sealing component 200. The locking component 100 is connected to the sealing component 200 by a threaded connection. A sealing sleeve 9 is embedded in the locking component 100. The locking component 100 is used to lock the steel strand 13 located in the sealing sleeve 9 by squeezing the sealing sleeve 9. The sealing component 200 is used to seal and protect the end of the steel strand 13.

[0035] like Figure 1 , 4 As shown in Figures 5, 6, and 7, in a preferred embodiment of the present invention, the locking assembly 100 includes a sealing expansion nut 11 and a sealing expansion head 10. Both the sealing expansion nut 11 and the sealing expansion head 10 are provided with through holes for the steel strand to pass through. The inner side of the sealing expansion nut 11 is provided with threads. The sealing expansion head 10 is sleeved on the inner side of the sealing expansion nut 11, and the sealing sleeve 9 is provided on the inner side of the sealing expansion head 10.

[0036] like Figure 1 , 2 As shown in Figure 3, in a preferred embodiment of the present invention, the sealing assembly 200 includes a sealing cover 4 and a sealing tube lower connector 8. The sealing tube lower connector 8 is a hollow cylindrical structure with openings at both ends. The sealing cover 4 is a hollow cylindrical structure with an opening at one end. The end of the sealing cover 4 with the opening is fixedly connected to the sealing tube lower connector 8. The outer diameter of the end of the sealing tube lower connector 8 away from the sealing cover 4 is provided with an external thread.

[0037] In this embodiment, during use, the steel strand 13 is threaded into the sealing sleeve 9. To protect the steel strand 13, a protective sleeve 18 can be installed outside the steel strand 13 to reduce wear on the sealing sleeve 9. Then, the sealing expansion nut 11 is screwed into the lower connector 8 of the sealing tube through the thread. At this time, the sealing expansion nut 11 presses down on the sealing expansion head 10, and the thickness of the sealing expansion head 10 becomes thinner from top to bottom, thereby pressing the sealing sleeve 9 inward, so that the sealing sleeve 9 fits tightly with the steel strand 13 or the protective sleeve 18. At this time, a sealed space is formed in the sealing sleeve 9, the lower connector 8 of the sealing tube, and the sealing cover 4 to seal and protect the steel strand 13. A protective medium 5 can be set in the sealed space to further improve the protective effect.

[0038] like Figure 8 and 9 As shown, this is a single-stage anti-buoyancy anchor provided in an embodiment of the present invention. The single-stage anti-buoyancy anchor includes a fixed-end anchor 17, a steel strand 13, a bearing plate 7, and a guide bracket 2. One end of the steel strand 13 is fixed by the fixed-end anchor 17, and the other end is fixed to the bearing plate 7 by the sealing structure described above. A spiral reinforcement 12 is wound around the end of the steel strand 13 near the bearing plate 7, and the end near the fixed-end anchor 17 is fixed in the building structure by an outer tube sealing lock head 15 and a water-stop steel plate 16. The guide bracket 2 is fixedly installed on the end of the bearing plate 7 away from the steel strand 13.

[0039] like Figure 16 As shown, in a preferred embodiment of the present invention, a tapered guide head 1 is provided at the end of the guide bracket 2 away from the bearing plate 7.

[0040] In this embodiment, during use, one end of the steel strand 13 is fixed using the fixed-end anchor 17, and then the end of the steel strand 13 near the fixed-end anchor 17 is fixed in the building structure using the outer tube sealing lock head 15 and the water-stop steel plate 16. The bearing plate 7 is the bearing plate under the concrete support of the steel strand 13 under the relative force of the anchor and the steel strand 13. The bearing plate 7 has the required resistance to disturbance. The outer tube sealing lock head 15 is composed of multiple sealing elements. It seals the connection part by thread locking and two sets of internal upper and lower sealing rings to block and prevent the foundation water from seeping up through the gaps in the pipe wall. The conical guide head 1 is used to provide guidance for the guide bracket 2. The guide bracket plays a guiding and centering role, increases the pull-out resistance, and avoids insufficient concrete strength at the bearing end caused by sediment in the bottom hole.

[0041] like Figure 10As shown in the figure, a multi-stage anti-buoyancy anchor bolt is provided in an embodiment of the present invention. The multi-stage anti-buoyancy anchor bolt includes a first anchor bolt structure 21, a third anchor bolt structure 19, a fixed end anchor 17, steel strands 13, and a guide bracket 2. The multi-stage anti-buoyancy anchor bolt includes at least one set of third anchor bolt structures 19, and the third anchor bolt structures 19 are connected in series. The first anchor bolt structure 21 is fixedly connected to one end of the series-connected third anchor bolt structures 19. One end of the steel strands 13 is fixed by the fixed end anchor 17, and the other end is fixed to the first anchor bolt structure 21 and the third anchor bolt structure 19 by the sealing structure described above. At least one set of steel strands 13 is fixedly connected to the first anchor bolt structure 21, and each set of third anchor bolt structures 19 has at least one set of steel strands 13 fixedly connected to it. The guide bracket 2 is fixedly installed at the end of the first anchor bolt structure 21 away from the third anchor bolt structure 19.

[0042] like Figure 10 As shown, in a preferred embodiment of the present invention, the third anchor structure 19 has the same structure as the first anchor structure 21, both including a bearing plate 7 and an isolation bracket 14. At least one set of sealing structures as described above is fixedly installed on the bearing plate 7. The outer edge of the bearing plate 7 is provided with a slot for the steel strand 13 to pass through. The isolation bracket 14 is disposed between the steel strands 13 for separating the steel strands 13.

[0043] In this embodiment, as Figure 11 , 12 13, 14, and 15, the multi-stage anti-buoyancy anchor bolts are composed of multiple stages. Since the third anchor bolt structure 19 has the same structure as the first anchor bolt structure 21, the number of first anchor bolt structures 21 can be multiple. The first anchor bolt structure 21 includes a bearing plate 7 and an isolation bracket 14. At least one set of sealing structures as described above is fixedly installed on the bearing plate 7. The sealing structure is used to fix the steel strand 13. The steel strand 13 is fixed by the fixed end anchor 17. The other end of the steel strand 13 is connected to each set of first anchor bolt structures 21, ensuring that at least one set of steel strands is connected to the bearing plate 7 on each first anchor bolt structure 21. For ease of explanation, a three-stage anti-buoyancy anchor bolt is used as an example. From top to bottom, they are the... The three-section anchor structure 19, the second-section anchor structure 20, and the first-section anchor structure 21 have the same structure, each containing a set of bearing plates 7. Six steel strands 13 are fixed using fixed-end anchors 17. Two of the steel strands 13 are connected to the bearing plate 7 in the third-section anchor structure 19 and fixed by a sealing structure. The remaining four steel strands 13 pass through the bearing plate 7 through the slot to the bearing plate 7 in the second-section anchor structure 20, where two more steel strands 13 are fixed. The remaining two steel strands 13 pass through the bearing plate 7 through the slot to the bearing plate 7 in the first-section anchor structure 21 and are fixed by a sealing structure.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seal structure, characterized by The sealing structure includes a locking component and a sealing component. The locking component is connected to the sealing component via a threaded connection. A sealing sleeve is embedded in the locking component. The locking component is used to lock the steel strand located inside the sealing sleeve by squeezing the sealing sleeve. The sealing component is used to seal and protect the ends of the steel strand. The locking assembly includes a sealing expansion clamp nut and a sealing expansion clamp head. Both the sealing expansion clamp nut and the sealing expansion clamp head are provided with through holes for the steel strand to pass through. The inner side of the sealing expansion clamp nut is provided with threads. The sealing expansion clamp head is sleeved inside the sealing expansion clamp nut. The sealing sleeve is provided inside the sealing expansion clamp head. The sealing assembly includes a sealing cover and a sealing tube lower connector. The sealing tube lower connector is a hollow cylindrical structure with openings at both ends. The sealing cover is a hollow cylindrical structure with an opening at one end. The opening end of the sealing cover is fixedly connected to the sealing tube lower connector. The outer diameter of the sealing tube lower connector away from the sealing cover is provided with an external thread. The external thread of the sealing tube lower connector mates with the thread on the inner side of the sealing expansion nut.

2. A single-stage anti-floating anchor rod, characterized by The single-stage anti-buoyancy anchor includes a fixed-end anchor, a steel strand, a bearing plate, and a guide bracket. One end of the steel strand is fixed by the fixed-end anchor, and the other end is fixed to the bearing plate by the sealing structure as described in claim 1. The end of the steel strand near the bearing plate is wound with a spiral reinforcement, and the end near the fixed-end anchor is fixed in the building structure by an outer tube sealing lock head and a water-stop steel plate. The guide bracket is fixedly installed on the end of the bearing plate away from the steel strand.

3. Single-stage anti-floating anchor rod according to claim 2, characterized in that The guide bracket is provided with a tapered guide head at the end away from the bearing plate.

4. A multi-stage anti-buoyancy anchor bolt, characterized in that... The multi-stage anti-buoyancy anchor bolt includes a first anchor bolt structure, a third anchor bolt structure, a fixed-end anchor, steel strands, and a guide bracket. The multi-stage anti-buoyancy anchor bolt includes at least one set of third anchor bolt structures, and the third anchor bolt structures are connected in series. The first anchor bolt structure is fixedly connected to one end of the series-connected third anchor bolt structure. One end of the steel strand is fixed by the fixed-end anchor, and the other end is fixed to the first anchor bolt structure and the third anchor bolt structure by the sealing structure as described in claim 1. At least one set of steel strands is fixedly connected to the first anchor bolt structure, and each set of third anchor bolt structures has at least one set of steel strands fixedly connected to it. The guide bracket is fixedly installed at the end of the first anchor bolt structure away from the third anchor bolt structure.

5. The multi-stage anti-buoyancy anchor bolt according to claim 4, characterized in that... The third anchor structure is the same as the first anchor structure, both including a bearing plate and an isolation bracket. At least one set of sealing structures as described in claim 1 is fixedly installed on the bearing plate. The outer edge of the bearing plate is provided with a slot for the steel strand to pass through. The isolation bracket is set between the steel strands to separate them.

6. The multi-stage anti-buoyancy anchor bolt according to claim 4, characterized in that... The guide bracket is provided with a tapered guide head at the end away from the bearing plate.

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