Anti-floating anchor rod with waterproof function and construction method thereof

Abstract

The invention belongs to the field of underground building engineering, and particularly relates to an anti-floating anchor rod with a waterproof function and a construction method thereof.The anti-floating anchor rod comprises a base layer and an anti-floating anchor rod body, the anti-floating anchor rod body is vertically embedded in the base layer, the base layer is formed by pouring C35 micro-expansion concrete, and the C35 micro-expansion concrete can generate certain expansion in the solidification process; the gap between the base layer and the surrounding soil body can be effectively filled, the compactness and integrity of the base layer are improved, and stable support is provided for the anti-floating anchor rod. According to the anti-floating anchor rod with the waterproof function and the construction method of the anti-floating anchor rod, through the synergistic effect of the self-repairing coating, the blocking layer and the elastic sealing layer of the composite waterproof layer, multiple waterproof barriers are formed. The anti-permeability and the corrosion resistance of the self-repairing coating are improved by adding the nano SiO2 and the zinc powder, the blocking layer of the double-layer HDPE film effectively prevents underground water from permeating, the elastic sealing layer can adapt to deformation of the anchor rod and prevent water from permeating through gaps, and the waterproof effect of the anti-floating anchor rod is greatly enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of underground construction engineering, in particular to an anti-floating anchor rod with waterproof function and a construction method thereof. Background Art

[0002] In underground construction projects, anti-floating anchor rods are key components to solve the anti-floating problem of buildings. However, due to the long-term presence in a complex underground environment, they are affected by multiple factors such as groundwater erosion, chemical corrosion, and mechanical stress, which makes anti-floating anchor rods prone to corrosion and waterproof layer failure, which seriously affects the safety and durability of underground buildings.

[0003] At present, there are many shortcomings in the anti-floating anchor rod waterproofing technology. For example, some waterproof structures are simply designed and cannot effectively resist the penetration of groundwater; some protective materials have poor performance and it is difficult to maintain a stable waterproof effect for a long time. In view of this, we propose an anti-floating anchor rod with waterproof function. Summary of the invention

[0004] The main purpose of the present invention is to provide an anti-floating anchor rod with waterproof function and a construction method thereof, which can solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention proposes an anti-floating anchor rod with waterproof function, comprising a base layer 5 and an anti-floating anchor rod, wherein the anti-floating anchor rod is vertically pre-embedded in the base layer, and the base layer is cast by C35 micro-expansive concrete. The C35 micro-expansive concrete will produce a certain expansion during the solidification process, which can effectively fill the gap between the base layer and the surrounding soil, improve the compactness and integrity of the base layer, and provide stable support for the anti-floating anchor rod, and the interior of the anti-floating anchor rod is provided with a fixing sleeve, and the inner wall of the fixing sleeve is welded with main reinforcement, and the fixing sleeve is made of high-strength steel, and the inner wall thereof is welded with main reinforcement, and the upper surface of the base layer is provided with a stepped groove, and micro-expansive concrete is cast in the stepped groove, and the upper surface of the micro-expansive concrete is provided with a composite waterproof layer, The composite waterproof layer includes a self-repairing coating, a barrier layer and an elastic sealing layer from the inside to the outside. The elastic sealing layer uses butyl rubber sealing material, which can adapt to the slight deformation of the anchor rod and prevent moisture from penetrating through tiny gaps. The upper surface of the composite waterproof layer is provided with a protective layer, which uses fiber-reinforced polymer FRP material to enhance the overall strength and durability of the structure and protect the composite waterproof layer from external force damage. The upper surface of the protective layer is provided with a raft foundation layer, which uses fiber-reinforced concrete. The addition of fibers can improve the crack resistance of concrete, enhance the integrity and durability of the raft foundation layer, and better withstand the load of the upper structure. The upper surface of the base layer is provided with an avoidance ring groove, and the protective layer is avoided through the avoidance ring groove.

[0006] Preferably, the self-repairing coating comprises, by mass ratio, 60% epoxy resin, 5% nano-SiO2, 10% microcapsule corrosion inhibitor, 3% silane coupling agent and 22% curing agent. Nano-SiO2 can fill the pores in the coating to improve the impermeability and density of the coating; the microcapsule corrosion inhibitor can be released in time when the coating is damaged to repair and protect the damaged parts.

[0007] Preferably, the main reinforcement is Φ32mm galvanized threaded steel with a bent top, and the galvanized layer can effectively prevent the main reinforcement from being corroded.

[0008] Preferably, the total depth of the stepped groove is 15 cm, divided into three levels, and the depth of each level is 5 cm. This gradient groove design can increase the contact surface between the filling material and the base layer, so that the micro-expansive concrete can better adapt to different spatial structures during the filling process and improve the filling density. At the same time, when the anchor rod is stressed, the stepped groove can disperse the stress concentration and reduce the damage of the stress to the waterproof layer and the anchor rod.

[0009] Preferably, the barrier layer is made of a double-layer HDPE film, which has good impermeability and chemical stability and can effectively prevent the penetration of groundwater.

[0010] Preferably, 5% zinc powder is additionally added to the self-repairing coating, and the addition of zinc powder further enhances the corrosion resistance of the coating.

[0011] Preferably, two groups of the fixing sleeves are provided, and C40 ordinary Portland cement is poured into the anti-floating anchor rod. By pouring C40 ordinary Portland cement into the anti-floating anchor rod, it is convenient to fix the internal fixing sleeves and the main reinforcement, thereby further enhancing the overall strength and stability of the anti-floating anchor rod.

[0012] The invention provides a construction method for an anti-floating anchor rod with waterproof function, comprising the following steps:

[0013] S1. Anchor rod pre-installation and cushion construction: Anti-floating anchor rods are prefabricated in the factory, and the main reinforcement is galvanized to ensure uniform thickness and reliable quality of the galvanized layer. At the construction site, the foundation is first leveled and compacted, and then the formwork is set up and the C35 micro-expansion concrete of the base is poured. During the concrete pouring process, the anti-floating anchor rods are accurately embedded in accordance with the design requirements to ensure the verticality and position accuracy of the anchor rods, and then the stepped grooves are poured with micro-expansion concrete;

[0014] S2. Spray the self-repairing coating on the surface of the stepped groove and the anti-floating anchor rod to a thickness of 0.3 mm to ensure that the coating is uniform and dense; lay a barrier layer on the outer surface of the self-repairing coating. Before laying, check the surface of the self-repairing coating to ensure that the surface is flat and free of defects, and that the overlap width meets the requirements; apply an elastic sealing layer on the outer surface of the barrier layer to ensure the sealing effect;

[0015] S3. Install a protective layer outside the composite waterproof layer to enhance structural protection; tie up the steel bars of the raft foundation layer and pour fiber-reinforced concrete. After the concrete pouring is completed, vibrate and maintain it to ensure the strength and quality of the raft foundation layer and bury the top of the anti-floating anchor into the raft foundation layer.

[0016] Preferably, when spraying the self-repairing coating in S2, the spraying equipment adopts a high-pressure airless sprayer, the spraying pressure is 0.5 MPa, and the ambient temperature is controlled between 15°C and 30°C.

[0017] Preferably, the barrier layer is laid in S2 by hot-melt welding, and the welding temperature is controlled between 200° C. and 250° C. to ensure a firm overlap.

[0018] The present invention provides an anti-floating anchor rod with waterproof function and a construction method thereof. It has the following beneficial effects:

[0019] (1) The anti-floating anchor rod with waterproof function and the construction method form a multiple waterproof barrier through the synergistic effect of the self-repairing coating, barrier layer and elastic sealing layer of the composite waterproof layer. The addition of nano-SiO2 and zinc powder improves the impermeability and corrosion resistance of the self-repairing coating, the barrier layer of the double-layer HDPE film effectively prevents the penetration of groundwater, and the elastic sealing layer can adapt to the deformation of the anchor rod and prevent water from penetrating through the gap, which greatly enhances the waterproof effect of the anti-floating anchor rod.

[0020] (2) The anti-floating anchor rod with waterproof function and the construction method effectively prevent the corrosion of the main reinforcement by galvanizing the main reinforcement and the effect of microcapsule corrosion inhibitor and zinc powder in the self-repairing coating. The pouring of C40 ordinary silicate cement also enhances the corrosion resistance of the internal structure of the anti-floating anchor rod and prolongs the service life of the anti-floating anchor rod.

[0021] (3) The anti-floating anchor rod and construction method with waterproof function disperse the stress concentration through the design of stepped grooves. The fiber reinforced polymer (FRP) protective layer enhances the overall strength of the structure. The fiber reinforced concrete raft foundation layer improves the crack resistance of the structure, so that the anti-floating anchor rod can work stably for a long time in a complex underground environment and has high durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the raft foundation layer and the base layer of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the protective layer and the anti-floating anchor rod of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the base layer and the stepped groove part of the present invention;

[0027] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the elastic sealing layer and the micro-expansive concrete of the present invention;

[0028] Figure 6 It is a schematic diagram of the partial exploded cross-sectional structure of the self-repairing coating and barrier layer of the present invention.

[0029] Explanation of the accompanying figures: 1. raft foundation layer; 2. protective layer; 3. elastic sealing layer; 4. stepped groove; 5. base layer; 6. main reinforcement; 7. fixing sleeve; 8. avoidance ring groove; 9. micro-expansive concrete; 10. anti-floating anchor rod; 11. self-repairing coating; 12. barrier layer; 13. composite waterproof layer.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 - Figure 6The present invention proposes an anti-floating anchor rod with waterproof function. The anti-floating anchor rod with waterproof function proposed by the present invention comprises a base layer 5 and an anti-floating anchor rod 10. The anti-floating anchor rod 10 is vertically pre-embedded in the base layer 5. The base layer 5 is cast by C35 micro-expansive concrete. The C35 micro-expansive concrete will produce a certain expansion during the solidification process, which can effectively fill the gap between the base layer and the surrounding soil, improve the compactness and integrity of the base layer, and provide stable support for the anti-floating anchor rod. A fixing sleeve 7 is arranged inside the anti-floating anchor rod 10. The inner wall of the fixing sleeve 7 is welded with a main reinforcement 6. The fixing sleeve 7 is made of high-strength steel, and the inner wall thereof is welded with a main reinforcement 6. The upper surface of the base layer 5 is provided with a stepped groove 4. Micro-expansive concrete 9 is cast in the stepped groove 4. A composite waterproof layer is arranged on the upper surface of the micro-expansive concrete 9. 13. The composite waterproof layer 13 includes a self-repairing coating 11, a barrier layer 12 and an elastic sealing layer 3 from the inside to the outside. The elastic sealing layer 3 uses butyl rubber sealing material, which can adapt to the slight deformation of the anchor rod and prevent moisture from penetrating through the tiny gaps. The upper surface of the composite waterproof layer 13 is provided with a protective layer 2. The protective layer 2 uses fiber-reinforced polymer FRP material to enhance the overall strength and durability of the structure and protect the composite waterproof layer from external force damage. The upper surface of the protective layer 2 is provided with a raft foundation layer 1. The raft foundation layer 1 uses fiber-reinforced concrete. The addition of fibers can improve the crack resistance of concrete, enhance the integrity and durability of the raft foundation layer, and better withstand the load of the upper structure. The upper surface of the base layer 5 is provided with an avoidance ring groove 8, and the avoidance ring groove 8 is used to avoid the protective layer 2.

[0033] In an embodiment of the present invention, the self-repairing coating 11 includes 60% epoxy resin, 5% nano-SiO2, 10% microcapsule corrosion inhibitor, 3% silane coupling agent and 22% curing agent by mass ratio. Nano-SiO2 can fill the pores in the coating to improve the impermeability and density of the coating; the microcapsule corrosion inhibitor can be released in time when the coating is damaged to repair and protect the damaged parts. An additional 5% zinc powder is added to the self-repairing coating 11. The addition of zinc powder further enhances the corrosion resistance of the coating. The barrier layer 12 adopts a double-layer HDPE film. The double-layer HDPE film has good impermeability and chemical stability, and can effectively prevent the infiltration of groundwater.

[0034] Preferably, the main reinforcement 6 is Φ32mm galvanized threaded steel with a bent design at the top. The galvanized layer can effectively prevent the main reinforcement from being corroded. The total depth of the stepped groove 4 is 15cm, divided into three levels, and the depth of each level is 5cm. This gradient groove design can increase the contact surface between the filling material and the base layer 5, so that the micro-expansive concrete 9 can better adapt to different spatial structures during the filling process and improve the filling density. At the same time, when the anchor rod is stressed, the stepped groove 4 can disperse the stress concentration and reduce the damage of the stress to the waterproof layer and the anchor rod.

[0035] Preferably, two groups of fixing sleeves 7 are provided, and C40 ordinary Portland cement is poured in the anti-floating anchor rod 10. By pouring C40 ordinary Portland cement in the anti-floating anchor rod 10, it is convenient to fix the internal fixing sleeve 7 and the main reinforcement 6, thereby further enhancing the overall strength and stability of the anti-floating anchor rod.

[0036] See also Figure 1 - Figure 6 The present invention provides a construction method for an anti-floating anchor rod with waterproof function, comprising the following steps:

[0037] S1. Anchor rod pre-installation and cushion construction: The anti-floating anchor rod 10 is prefabricated in the factory, and the main reinforcement 6 is galvanized to ensure that the thickness of the galvanized layer is uniform and the quality is reliable. At the construction site, the foundation is first leveled and compacted, and then the formwork is set up and the C35 micro-expansion concrete of the base layer 5 is poured. During the concrete pouring process, the anti-floating anchor rod 10 is accurately embedded according to the design requirements to ensure the verticality and position accuracy of the anchor rod, and then the stepped groove 4 is poured with micro-expansion concrete 9;

[0038] S2. Spray the self-repairing coating 11 on the surface of the stepped groove 4 and the part where the anti-floating anchor rod 10 passes through, so that its thickness reaches 0.3 mm, and ensure that the coating is uniform and dense; lay the barrier layer 12 on the outer surface of the self-repairing coating 11, and check the surface of the self-repairing coating before laying to ensure that the surface is flat and free of defects, and that the overlap width meets the requirements; apply the elastic sealing layer 3 on the outer surface of the barrier layer 12 to ensure the sealing effect;

[0039] S3. Install a protective layer 2 outside the composite waterproof layer 13 to enhance structural protection; tie up the steel bars of the raft foundation layer 1 and pour fiber-reinforced concrete. After the concrete pouring is completed, vibrate and maintain it to ensure the strength and quality of the raft foundation layer 1 so that the top of the anti-floating anchor rod 10 is buried in the raft foundation layer 1.

[0040] Preferably, when spraying the self-repairing coating 11 in S2, the spraying equipment adopts a high-pressure airless sprayer, the spraying pressure is 0.5 MPa, and the ambient temperature is controlled between 15°C and 30°C.

[0041] Preferably, the barrier layer 12 is laid in S2 by hot-melt welding, and the welding temperature is controlled between 200°C and 250°C to ensure a firm overlap.

[0042] In the present invention, the specific construction steps are

[0043] S1. Anchor bolt pre-installation and cushion construction

[0044] When the anti-floating anchor rod 10 is prefabricated in the factory, the main reinforcement 6 is galvanized. The galvanizing process adopts hot-dip galvanizing method, immersing the main reinforcement 6 in molten zinc liquid to form a uniform and dense galvanized layer on the surface of the main reinforcement 6. The galvanizing process strictly controls parameters such as temperature and time to ensure that the thickness of the galvanized layer is uniform and the quality is reliable. The thickness meets the industry standard requirements and is generally between 80-120μm. After the galvanizing is completed, the main reinforcement 6 is welded to the two sets of fixed sleeves 7. The welding process adopts gas shielded welding. By accurately controlling the welding current, voltage and welding speed, the welding quality is guaranteed, so that the strength of the weld is not lower than the strength of the main reinforcement 6 itself.

[0045] At the construction site, the foundation is first leveled and compacted. Professional earth-moving machinery, such as bulldozers and rollers, is used to compact the loose soil layer on the surface of the foundation to achieve the density required by the design. Then the formwork is supported. The formwork adopts high-strength and high-precision steel formwork to ensure the flatness and verticality of the formwork. The C35 micro-expansive concrete of the base layer 5 is poured. During the concrete mixing process, the mix ratio of raw materials is strictly controlled, and the amount of cement, aggregate, water and admixture is accurately measured using electronic metering equipment. The concrete pouring adopts the layered pouring method, and the pouring thickness of each layer is controlled between 30-50cm. Vibration is carried out by inserting a vibrating rod to ensure that the concrete is dense and has no defects such as honeycombs and pockmarks. During the concrete pouring process, the anti-floating anchor rod 10 is accurately embedded in accordance with the design requirements, and the total station and other measuring equipment are used for positioning to ensure that the verticality deviation of the anchor rod does not exceed 1%, and the position accuracy deviation is controlled within ±20mm.

[0046] After the initial setting of the base concrete, the stepped groove 4 is poured with micro-expansive concrete 9. The mix ratio of the micro-expansive concrete 9 is strictly designed, and the amount of the expansion agent is adjusted according to the actual project conditions, generally between 8% and 12%. During the pouring process, a small vibrating device, such as a flat vibrator, is used to vibrate the micro-expansive concrete 9 to ensure that it is densely filled and closely combined with the base 5 and the anti-floating anchor 10.

[0047] S2. Spraying self-repairing coating and laying barrier layer

[0048] The self-repairing coating 11 is sprayed on the surface of the stepped groove 4 and the part where the anti-floating anchor rod 10 passes through. Before spraying, the surface is strictly cleaned and washed with a high-pressure water gun and polished with sandpaper to remove dust, oil and loose particles on the surface to ensure that the surface is flat and rough to enhance the adhesion of the coating. The spraying equipment uses a high-pressure airless sprayer with a spraying pressure of 0.5MPa and an ambient temperature controlled between 15℃-30℃. During the spraying process, the spray gun is kept vertical to the spraying surface, the distance is controlled between 20-30cm, and the spray gun is moved at a constant speed to make the coating thickness uniform and meet the design requirement of 0.3mm.

[0049] The barrier layer 12 is laid on the outer surface of the self-repairing coating 11. Before laying, the surface of the self-repairing coating is inspected to ensure that there are no defects such as bubbles and cracks on the surface. The double-layer HDPE film is laid using a hot melt welding process. The welding temperature is controlled between 200℃-250℃. The welding speed is adjusted according to the thickness of the HDPE film and the performance of the welding equipment, generally between 0.5-1.5m / min. During the welding process, professional welding detection equipment, such as an ultrasonic detector, is used to conduct real-time detection of the welding quality to ensure that the overlap width meets the requirements, generally not less than 10cm, and the welding is firm without leakage points.

[0050] Apply the elastic sealing layer 3 on the outer surface of the barrier layer 12. Before applying, heat the butyl rubber sealing material to a suitable construction temperature, generally between 60°C and 80°C, to make it have good fluidity and viscosity. Use a special application tool, such as a scraper or a roller, to evenly apply the elastic sealing layer 3 on the surface of the barrier layer 12, and control the application thickness between 2-3mm to ensure the sealing effect and prevent moisture penetration.

[0051] S3. Install the protective layer and pour the raft foundation layer

[0052] The protective layer 2 is installed outside the composite waterproof layer 13. The protective layer 2 uses a prefabricated FRP sheet. During the installation process, a special adhesive is used to tightly bond the FRP sheet to the composite waterproof layer 13. The adhesive is selected according to the characteristics of the FRP material to ensure high bonding strength and good durability. At the same time, bolts or rivets are used to fix the FRP sheet to ensure that the protective layer 2 is firmly installed and forms a whole with the composite waterproof layer 13 to enhance the structural protection capability.

[0053] Tie up the steel bars of the raft foundation layer 1. According to the design requirements, determine the specifications, spacing and tying methods of the steel bars. The intersections of the steel bars are tied firmly with iron wire to ensure the stability of the steel skeleton. During the tying process, set up enough protective layer pads to ensure that the thickness of the protective layer of the steel bars meets the design requirements, generally between 30-50mm. Then pour the fiber reinforced concrete. The fiber content is determined according to the design strength and crack resistance requirements of the concrete, generally between 0.5% and 1.5%. The concrete pouring adopts the method of layered pouring and layered vibration. The pouring thickness of each layer does not exceed 50cm. The concrete is made dense by vibration without defects such as holes and looseness. After the concrete pouring is completed, it is vibrated and cured. The curing adopts the method of sprinkling curing or covering with plastic film curing. The curing time is determined according to the type of concrete and the ambient temperature, generally not less than 7 days, to ensure the strength and quality of the raft foundation layer 1, so that the top of the anti-floating anchor rod 10 is buried in the raft foundation layer 1, and the burying depth meets the design requirements, generally between 30-50cm.

[0054] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An anti-floating anchor rod with waterproof function, comprising a base layer (5) and an anti-floating anchor rod (10), characterized in that: An anti-floating anchor rod (10) is vertically pre-buried in the base layer (5), a fixing sleeve (7) is arranged inside the anti-floating anchor rod (10), a main reinforcement (6) is welded to the inner wall of the fixing sleeve (7), a stepped groove (4) is arranged on the upper surface of the base layer (5), micro-expansive concrete (9) is poured in the stepped groove (4), a composite waterproof layer (13) is arranged on the upper surface of the micro-expansive concrete (9), the composite waterproof layer (13) comprises a self-repairing coating (11), a barrier layer (12) and an elastic sealing layer (3) from the inside to the outside, a protective layer (2) is arranged on the upper surface of the composite waterproof layer (13), a raft foundation layer (1) is arranged on the upper surface of the protective layer (2), and an avoidance ring groove (8) is arranged on the upper surface of the base layer (5).

2. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: The self-repairing coating (11) comprises, by mass ratio, 60% of epoxy resin, 5% of nano-SiO2, 10% of microcapsule corrosion inhibitor, 3% of silane coupling agent and 22% of curing agent.

3. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: The main reinforcement (6) is a Φ32mm galvanized threaded steel bar with a bent top.

4. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: The total depth of the stepped groove (4) is 15 cm, and it is divided into three levels, with a depth of 5 cm for each level.

5. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: The barrier layer (12) is a double-layer HDPE film.

6. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: 5% of zinc powder is additionally added to the self-repairing coating (11).

7. The anti-floating anchor rod with waterproof function according to claim 1, characterized in that: The fixing sleeves (7) are provided in two groups, and C40 ordinary Portland cement is poured into the anti-floating anchor rod (10).

8. A construction method for an anti-floating anchor rod with waterproof function as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, anchor rod pre-installation and cushion layer construction: prefabricate anti-floating anchor rods (10) in the factory, and galvanize the main reinforcement (6); pour C35 micro-expansive concrete of the base layer (5) at the construction site and pre-embed the anti-floating anchor rods (10), and then pour the stepped grooves (4) with micro-expansive concrete (9); S2. Spray the self-repairing coating (11) on the surface of the stepped groove (4) and the part where the anti-floating anchor rod (10) passes through, so that its thickness reaches 0.3 mm; lay a barrier layer (12) on the outer surface of the self-repairing coating (11) to ensure that the overlap width meets the requirements; apply an elastic sealing layer (3) on the outer surface of the barrier layer (12) to ensure the sealing effect; S3, installing a protective layer (2) outside the composite waterproof layer (13) to enhance structural protection; tying up the steel bars of the raft foundation layer (1), pouring fiber-reinforced concrete, and embedding the top of the anti-floating anchor rod (10) into the raft foundation layer (1).

9. The construction method of the anti-floating anchor rod with waterproof function according to claim 8, characterized in that: When spraying the self-repairing coating (11) in S2, the spraying equipment adopts a high-pressure airless sprayer, the spraying pressure is 0.5 MPa, and the ambient temperature is controlled between 15°C and 30°C.

10. The construction method of the anti-floating anchor rod with waterproof function according to claim 8, characterized in that: The barrier layer (12) in S2 is laid using a hot melt welding process, and the welding temperature is controlled between 200° C. and 250° C. to ensure a firm overlap.

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