Waterproof joint structure of anti-floating anchor rod
By designing a multi-layered waterproof structure and a metal load-bearing body, the problem of poor waterproof performance of the anti-buoyancy anchor was solved, achieving a tight fit and waterproof effect between the anti-buoyancy anchor and the concrete base slab, thus enhancing the building's waterproof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN FOREIGN AUTOMOBILE SERVICE CO
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing anti-buoyancy anchors have poor waterproofing performance, and the waterproofing layer is prone to loosening and falling off, causing water to enter the gaps, resulting in uneven stress on the reinforced concrete base slab and easy cracking.
The system employs a multi-layered waterproof structure, including a non-curing waterproof coating layer, a water-swellable waterstop strip, an SBS waterproof layer, and a cement-based penetrating crystalline waterproof coating layer. Combined with a metal support and a conical guide cap, it ensures a tight fit between the anti-buoyancy anchor and the concrete base slab and provides effective waterproofing.
Effective waterproofing was achieved between the anti-buoyancy anchor and the concrete base slab, preventing water seepage, enhancing the waterproofing performance of the joint, and ensuring the stability and waterproofing effect of the building.
Smart Images
Figure CN224338306U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-buoyancy anchor technology, and in particular to a waterproof joint structure for anti-buoyancy anchors. Background Technology
[0002] Anti-buoyancy anchors are a type of anti-buoyancy measure for underground structures in building engineering. Unlike ordinary foundation piles, anti-buoyancy anchors have their own unique properties. The biggest difference between them is that foundation piles are usually compression piles, where the pile body bears the pressure of the building load, and the force is transmitted from the top of the pile to the bottom of the pile. The magnitude of the force on the pile body changes with the change of the building load. On the other hand, anti-buoyancy piles are tension piles, where the force is also transmitted from the top of the pile to the bottom of the pile. The magnitude of the force on the pile body changes with the change of the groundwater level, but the force mechanisms of the two are exactly opposite.
[0003] However, ordinary anti-buoyancy anchors have poor waterproof performance, and the waterproof layer is prone to loosening and falling off, allowing water to enter the gaps of the anti-buoyancy anchors. This causes uneven stress on the reinforced concrete base plate, making it prone to cracking and failing to meet people's usage needs. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a waterproof joint structure for anti-buoyancy anchor rods.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] This utility model discloses a waterproof joint structure for an anti-buoyancy anchor, comprising a reinforced concrete base slab, an anti-buoyancy anchor penetrating the interior of the reinforced concrete base slab, a non-curing waterproof coating layer at the top of the junction between the anti-buoyancy anchor and the reinforced concrete base slab, a sleeve installed outside the anti-buoyancy anchor, and a water-swellable waterproof strip installed on the outside of the sleeve, the water-swellable waterproof strip being located inside the reinforced concrete base slab, a waterproof rubber collar installed at the bottom end of the reinforced concrete base slab, and an SBS waterproof layer installed at the bottom end of the waterproof rubber collar. An SBS waterproofing supplementary layer is provided at the bottom of the layer, and a cement-based penetrating crystalline waterproof coating layer is provided at the bottom of the SBS waterproofing supplementary layer. The bottom of the cement-based penetrating crystalline waterproof coating layer is a concrete cushion layer. A water-swellable waterstop strip is provided inside the concrete cushion layer. A rock layer is provided at the bottom of the concrete cushion layer. A positioning frame fixed to an anti-buoyancy anchor is provided inside the rock layer. A metal support body is provided at the bottom of the anti-buoyancy anchor, and the anti-buoyancy anchor passes through the positioning frame and is connected to the metal support body. A conical guide cap is provided at the end of the metal support body.
[0007] As a preferred technical solution of this utility model, the anti-buoyancy anchor rod is provided with two water-swellable sealing strips on its exterior. One water-swellable sealing strip is located on the outside of the sleeve, and the other water-swellable sealing strip is located on the anti-buoyancy anchor rod, which is used to connect the two sleeve sections on the anti-buoyancy anchor rod.
[0008] As a preferred technical solution of this utility model, a fixing bolt is inserted through the conical guide cap at the bottom of the anti-buoyancy anchor rod to fix the anti-buoyancy anchor rod body.
[0009] As a preferred embodiment of this invention, the interior of the anti-buoyancy anchor rod and the sleeve is filled with lubricating grease.
[0010] As a preferred technical solution of this utility model, a water-swellable waterstop strip is provided at the connection between the anti-buoyancy anchor rod and the metal bearing body and the conical guide cap.
[0011] As a preferred embodiment of this utility model, the anti-buoyancy anchor is a prestressed anchor, and the number of anti-buoyancy anchors is one.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. This utility model secures and stabilizes the anti-buoyancy anchor rod within the rock layer by setting a positioning frame inside the rock layer;
[0014] 2. By setting up a metal load-bearing body and a conical guide cap, it can be ensured that the anti-buoyancy anchor rod is vertical and does not bend inside the rock layer during construction;
[0015] 3. By setting up a cement-based penetrating crystalline waterproof coating layer, an SBS waterproof additional layer, and an SBS waterproof layer, the combined effect of multiple waterproof layers gives the joint between the anti-buoyancy anchor and the rock layer and concrete base plate excellent waterproof performance.
[0016] 4. By setting multiple water-swellable sealing strips, which can expand when exposed to water, the anti-buoyancy anchor rods are tightly bonded to the concrete base plate, the anti-buoyancy anchor rods and the casing, and the concrete base plate, preventing water seepage caused by various phenomena such as the concrete base plate and the inside of the casing.
[0017] 5. By setting waterproof rubber collars, the waterproofing of the anti-buoyancy anchor at the junction of the concrete base and the rock layer is strengthened, preventing water seepage.
[0018] 6. By applying a non-curing waterproof coating layer to the upper part of the concrete base slab and the anchoring point of the anti-buoyancy anchor, water reaching the top of the concrete base slab along the anti-buoyancy anchor cannot penetrate the concrete base slab. Attached Figure Description
[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0020] Figure 1 This is a sectional view of the overall structure of this utility model;
[0021] Figure 2 This is a cross-sectional view of the upper waterproof structure of this utility model, showing more details;
[0022] Figure 3 This is a cross-sectional view of the internal structure of the anti-buoyancy anchor rod located in the rock layer in this utility model;
[0023] In the diagram: 1. Reinforced concrete base slab, 2. Anti-buoyancy anchor, 3. Sleeve, 4. Lower water-swellable waterstop strip, 5. Upper water-swellable waterstop strip, 6. Waterproof rubber collar, 7. Asphalt waterproof sealant, 8. SBS waterproof layer, 9. SBS waterproof additional layer, 10. Cement-based penetrating crystalline waterproof coating, 11. Concrete cushion layer, 12. Water-swellable waterstop strip at the bottom of the waterproof layer, 13. Rock layer, 14. Positioning frame, 15. Metal load-bearing body, 16. Conical guide cap, 17. Fixing bolt, 18. Water-swellable waterstop strip at the bottom of the positioning frame, 19. Lubricating grease, 20. Cement grout, 21. Non-curing waterproof coating, 22. Steel plate, 23. Anchor. Detailed Implementation
[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0025] like Figure 1-3As shown, this utility model provides a waterproof joint structure for an anti-buoyancy anchor rod, including a reinforced concrete base slab 1, an anti-buoyancy anchor rod 2 penetrating the interior of the reinforced concrete base slab 1, a sleeve 3 installed on the exterior of the anti-buoyancy anchor rod 2, and a lower water-swellable sealing strip 4 and an upper water-swellable sealing strip 5 installed on the outer side of the sleeve 3, both of which are located inside the reinforced concrete base slab 1. A waterproof rubber collar 6 is installed at the bottom end of the reinforced concrete base slab 1, and an asphalt waterproof sealant 7 is installed inside the waterproof rubber collar 6. An SBS waterproof layer 8 is installed at the bottom end of the waterproof rubber collar 6, and an SBS waterproof coating is installed at the bottom end of the SBS waterproof layer 8. The bottom of the additional SBS waterproof layer 9 is provided with a cement-based penetrating crystalline waterproof coating 10, thereby forming a cement-based penetrating crystalline waterproof coating layer. The bottom of the cement-based penetrating crystalline waterproof coating 10 is a concrete cushion layer 11. A water-swellable waterproof sealing strip 12 is provided inside the concrete cushion layer 11. A rock layer 13 is provided at the bottom of the concrete cushion layer 11. A positioning frame 14 is provided inside the rock layer 13. The anti-buoyancy anchor 2 is located at the bottom of the rock layer 13 and is provided with a metal support body 15. The anti-buoyancy anchor 2 passes through the positioning frame 14 and is connected to the metal support body 15. A conical guide cap 16 is provided at the end of the metal support body 15.
[0026] The anti-buoyancy anchor 2 is equipped with two water-swellable sealing strips on its exterior. The lower water-swellable sealing strip 4 is located on the outside of the sleeve, and the upper water-swellable sealing strip 5 is located on the anti-buoyancy anchor 2. Before construction, the sleeve 3 needs to be divided and then rejoined. The water-swellable sealing strip 5 is used to connect the divided and rejoined sleeve 3 on the anti-buoyancy anchor. By setting the water-swellable sealing strip, the sleeve 3 and the concrete base slab 1 are tightly fitted to prevent water seepage.
[0027] The bottom tapered guide cap 16 of the anti-buoyancy anchor rod 2 has a fixing bolt 17 inside that tightly fixes the anti-buoyancy anchor rod body. The thread size of the fixing bolt 17 matches the thread size of the anti-buoyancy anchor rod 2.
[0028] Among them, a water-swellable waterstop strip 18 is installed at the bottom of the positioning frame at the connection between the anti-buoyancy anchor rod 2 and the metal bearing body 15 and the conical guide cap 16.
[0029] The anti-buoyancy anchor rod 2 and the sleeve 3 are filled with lubricating grease 19 inside, and are in close contact with the rock layer 13 by injecting cement grout 20 outside.
[0030] In this process, a non-curing waterproof coating 21 is applied to the top of the junction between the anti-buoyancy anchor 2 and the reinforced concrete base slab 1 to form a non-curing waterproof coating layer, thereby ensuring the waterproof effect of the final anti-buoyancy anchor.
[0031] The anti-buoyancy anchor is a prestressed anchor, and there is only one anti-buoyancy anchor, which can effectively ensure the tensioning effect during tensioning.
[0032] Working principle: Specifically, when using this utility model, firstly, a sleeve 3 is added to the anti-buoyancy anchor rod 2, and a 1mm gap is maintained between the sleeve 3 and the anti-buoyancy anchor rod 2, which is filled with lubricating grease 19. Then, the metal carrier 15 is welded to the conical guide cap 16 in advance. Then, the metal carrier 15 and the conical guide cap 16 are connected to the anti-buoyancy anchor rod 2 by fixing bolts 17, and a water-swellable waterstop strip 18 is set at the bottom of the positioning frame at the connection. Then, according to the spacing of the positioning frame, a positioning frame 14 is set on the outside of the anti-buoyancy anchor rod 2 and the sleeve 3. The positioning frame is fastened to the anti-buoyancy anchor rod with screws. Some of the processes of the anti-buoyancy anchor rod 2 are prepared in advance. After the preliminary process is completed, a machine is used to drill holes, and the anti-buoyancy anchor rod 2 is fixed inside the rock layer 13 by the fixed positioning frame 14. Then, cement grout 20 is injected. Next, a concrete cushion layer 11 is installed at the top of the rock layer 13. A waterproof layer bottom water-swellable sealing strip 12 is installed in the concrete cushion layer. A 2mm thick cement-based penetrating crystalline waterproof coating 10 is applied on the concrete cushion layer 11. After the cement-based penetrating crystalline waterproof coating 10 dries, an SBS waterproof supplementary layer 9 is laid. An SBS waterproof layer 8 is laid on top of the SBS waterproof supplementary layer 9. Both the SBS waterproof supplementary layer 9 and the SBS waterproof layer 8 are fully bonded using the hot-melt method. A waterproof rubber collar 6 is installed at the top of the SBS waterproof layer 8. Inside the waterproof rubber collar 6... Asphalt waterproof sealant 7 is applied to enhance the waterproofing effect between the reinforced concrete base slab 1 and the rock layer 13. Water-swellable sealing strips 4 (lower) and 5 (upper) are installed on the outside of the anti-buoyancy anchor rod 2 and sleeve 3. The lower water-swellable sealing strip 4 is located on the outside of the sleeve 3, and the upper water-swellable sealing strip 5 is located on the anti-buoyancy anchor rod 2. Before construction, the sleeve 3 needs to be divided and then joined together. The upper water-swellable sealing strip 5 is used to connect the divided and joined sleeve 3 on the anti-buoyancy anchor rod. Both the lower and upper water-swellable sealing strips 4 and 5 are located inside the reinforced concrete base slab 1. All water-swellable sealing strips are securely tied with wire. After all the above procedures are completed, the reinforcement of the reinforced concrete base slab 1 can be tied and the base slab concrete poured. After the foundation slab concrete is poured, wait until the foundation slab concrete reaches the design strength before tensioning the anti-buoyancy anchor rods. Before tensioning, apply a 2mm thick non-curing waterproof coating 21 to the upper part of the junction between the reinforced concrete foundation slab 1 and the anti-buoyancy anchor rod 2. After drying, place a steel plate 22 on it, place the anchor 23 on the steel plate, tension the anti-buoyancy anchor rods, and then seal the anchor.
[0033] In summary, this utility model, by setting a positioning frame, makes the anti-buoyancy anchor more firmly and stably embedded in the rock layer. By setting a metal load-bearing body and a conical guide cap, it ensures that the anti-buoyancy anchor body remains vertical and without bending within the rock layer during construction. By setting a cement-based penetrating crystalline waterproof coating, an SBS waterproof additional layer, and an SBS waterproof layer, the combined effect of their waterproofing provides excellent waterproofing performance at the joints between the anti-buoyancy anchor and the rock layer and the concrete base slab. By setting a water-swellable waterstop strip, which expands upon contact with water, it ensures a tight fit between the anti-buoyancy anchor and the concrete base slab, between the anti-buoyancy anchor and the casing, and between the anti-buoyancy anchor and the concrete base slab, preventing water seepage from various sources, including the concrete base slab and the inside of the casing. By setting a waterproof rubber collar and asphalt waterproof sealant, it provides stronger waterproofing protection at the interface between the anti-buoyancy anchor and the rock layer, preventing water seepage.
[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A waterproof joint structure for an anti-buoyancy anchor bolt, comprising a reinforced concrete base slab (1), characterized in that, An anti-buoyancy anchor rod (2) penetrates the interior of the reinforced concrete base slab (1). A sleeve (3) is installed on the outside of the anti-buoyancy anchor rod (2). A water-swellable waterstop strip is installed on the outside of the sleeve. The water-swellable waterstop strip is located inside the reinforced concrete base slab (1). A waterproof rubber collar (6) is installed at the bottom end of the reinforced concrete base slab (1). An SBS waterproof layer (8) is installed at the bottom end of the waterproof rubber collar (6). An SBS waterproof additional layer (9) is installed at the bottom end of the SBS waterproof layer (8). A cement-based penetrating crystalline waterproof coating layer is installed at the bottom end of the asphalt waterproof additional layer (9). The bottom of the cement-based penetrating crystalline waterproof coating layer is a concrete cushion layer (11). A water-swellable waterstop strip (12) is installed inside the concrete cushion layer (11). A rock layer (13) is installed at the bottom of the concrete cushion layer (11). A positioning frame (14) fixed on the anti-buoyancy anchor rod (2) is installed inside the rock layer (13). A metal support body (15) is installed at the bottom of the rock layer (13). The anti-buoyancy anchor rod (2) passes through the positioning frame (14) and is connected to the metal support body (15). A conical guide cap (16) is installed at the end of the metal support body (15).
2. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, The anti-buoyancy anchor (2) is provided with two water-swellable sealing strips on the outside. One water-swellable sealing strip is located on the outside of the sleeve (3), and the other water-swellable sealing strip (5) is located on the anti-buoyancy anchor (2). It is used to connect the two sleeves on the anti-buoyancy anchor (2).
3. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, The bottom of the anti-buoyancy anchor (2) has a conical guide cap (16) with a fixing bolt (17) inside for fixing the rod body of the anti-buoyancy anchor (2).
4. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, A water-swellable sealing strip (18) is provided at the connection between the anti-buoyancy anchor (2), the metal bearing body (15), and the conical guide cap (16).
5. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, The interior of the anti-buoyancy anchor (2) and the sleeve (3) is filled with lubricating grease (19).
6. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, The anti-buoyancy anchor (2) is a prestressed anchor, and the number of anti-buoyancy anchors (2) is one.
7. The anti-buoyancy anchor waterproof joint structure according to claim 1, characterized in that, A non-curing waterproof coating layer is provided at the top of the junction between the anti-buoyancy anchor (2) and the reinforced concrete base plate (1).