A waterproof structure for anti-buoyancy anchor bolts

Abstract

This utility model discloses a waterproof structure for anti-buoyancy anchors, comprising: a cement-based penetrating crystalline waterproof coating layer, a base slab waterproof membrane reinforcement layer, a water-swellable rubber waterstop strip, and an asphalt sealant layer. The cement-based penetrating crystalline waterproof coating layer is applied to the concrete surface of the pile head. The base slab waterproof membrane reinforcement layer covers the surface of the cement-based penetrating crystalline waterproof coating layer, extending from the outer wall of the anchor reinforcement to a perimeter of 300mm, forming a continuous, sealed waterproof surface with the asphalt sealant. The rubber waterstop strip is tightly wrapped around the anchor reinforcement, expanding in volume by more than three times upon contact with water, filling the micro-gaps between the reinforcement and the concrete. The asphalt sealant layer is injected from the top surface of the pile head concrete to the waterstop strip, forming a flexible seal with a thickness ≥20mm, adapting to the relative displacement between the anchor and the base slab. This utility model effectively solves the problem of leakage at the pile head of anti-buoyancy anchors, providing an innovative solution for improving the waterproofing quality of underground engineering.

Description

Technical Field

[0001] This utility model relates to the field of waterproofing technology for underground structures in building engineering, and more specifically to a waterproofing structure for anti-buoyancy anchor bolts. This structure, through the synergistic effect of multiple layers of composite waterproofing materials, solves the leakage risks caused by the difficulty of waterproofing construction of traditional anti-buoyancy anchor bolt pile heads, and is suitable for the waterproofing design and construction of anti-buoyancy anchor bolt joints in underground engineering. Background Technology

[0002] In building construction, anti-buoyancy anchors are crucial structural components for resisting the buoyancy of groundwater. The waterproofing of the connection between the pile head and the basement floor slab is a significant challenge. Traditional methods often fail to completely wrap the anchor reinforcement with waterproof membrane due to the dense reinforcement and limited space at the pile head. Furthermore, micro-cracks can easily form at the joint due to concrete shrinkage, leading to leakage risks. Current technologies often employ single waterproof coatings or localized sealing, but these methods suffer from the following problems:

[0003] 1. Insufficient material adaptability: Ordinary waterproof coatings are unable to resist the shear deformation between the anchor rod and the base plate, and are prone to cracking and failure;

[0004] 2. Discontinuous joint sealing: The waterproof membrane cannot form a closed wrap at the pile head, creating leakage channels;

[0005] 3. Poor durability: Long-term groundwater erosion can easily lead to aging and detachment of the sealing material.

[0006] The aforementioned problems make the pile head a major weak point for basement floor slab leakage, and there is an urgent need for a multi-material collaborative and rationally constructed waterproofing system to ensure the reliability and durability of joint waterproofing. Utility Model Content

[0007] To overcome the aforementioned shortcomings of existing technologies, this utility model provides a waterproof structure for anti-floating anchor bolts. Through the synergistic effect of water-swellable rubber waterstop strips, asphalt sealant, cement-based penetrating crystalline waterproof coating, and waterproof membrane, a triple waterproofing system of "dynamic sealing + rigid protection + flexible wrapping" is formed. This structure breaks through the limitations of traditional single-material waterproofing, achieving fully sealed waterproofing at the connection between the pile head and the base slab, significantly improving the joint's impermeability and structural durability, and reducing leakage repair costs.

[0008] The technical solution of this utility model is as follows:

[0009] A waterproof structure for anti-buoyancy anchors includes: a cement-based penetrating crystalline waterproof coating layer, a waterproof membrane reinforcement layer for the base slab, a water-swellable rubber waterstop strip, and an asphalt sealant layer.

[0010] The cement-based penetrating crystalline waterproof coating is applied to the surface of the pile head concrete; the waterproof membrane reinforcement layer of the base plate covers the surface of the cement-based penetrating crystalline waterproof coating, extending from the outer wall of the anchor rod reinforcement to a perimeter of 300mm, forming a continuous and sealed waterproof surface with the asphalt sealant; the rubber waterstop is tightly wrapped around the anchor rod reinforcement, expanding more than 3 times its original volume when exposed to water, filling the micro-gaps between the reinforcement and the concrete; the asphalt sealant sealing layer is injected from the top surface of the pile head concrete to the waterstop, forming a flexible seal with a thickness of ≥20mm to accommodate the relative displacement between the anchor rod and the base plate.

[0011] The cement-based penetrating crystalline waterproof coating has a thickness of ≥1.5mm, and the capillary channels are blocked by the penetration and crystallization of active substances.

[0012] The reinforcing layer of the waterproof membrane on the base slab is made of polymer self-adhesive membrane.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. Multiple waterproof protections: The four layers of material provide dynamic sealing, deformation compensation, rigid impermeability, and overall wrapping, reducing the risk of leakage by more than 90%;

[0015] 2. Ease of construction: Modular structure adapts to complex nodes, requires no special equipment, and improves construction efficiency by 50%;

[0016] 3. Economical and durable: Material costs are reduced by 35% compared to traditional grouting processes, and the service life is the same as the structure's lifespan;

[0017] 4. Deformation resistance: The flexible sealing layer can withstand shear displacement of more than 2mm, avoiding cracking of the waterproof layer due to structural deformation;

[0018] 5. Environmental friendliness: Non-toxic and environmentally friendly materials are used, and the construction process is pollution-free.

[0019] This technology effectively solves the problem of leakage at the head of anti-buoyancy anchor bolts, providing an innovative solution for improving the waterproofing quality of underground engineering projects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1

[0023] like Figure 1 The anti-buoyancy anchor waterproof structure shown includes: a cement-based penetrating crystalline waterproof coating layer 1, a waterproof membrane reinforcement layer for the base plate 2, a water-swellable rubber waterstop strip 3, and an asphalt sealant layer 4.

[0024] The cement-based penetrating crystalline waterproof coating 1 is applied to the surface of the pile head concrete 5; the waterproof membrane reinforcement layer of the base plate covers the surface of the cement-based penetrating crystalline waterproof coating, extending from the outer wall of the anchor rod reinforcement to a perimeter range of 300mm, forming a continuous and sealed waterproof surface with the asphalt sealant; the rubber waterstop strip is tightly wrapped around the anchor rod reinforcement 6, and expands more than 3 times in volume when exposed to water, filling the micro gaps between the reinforcement and the concrete; the asphalt sealant sealing layer is injected from the top surface of the pile head concrete to the waterstop strip, forming a flexible seal with a thickness of ≥20mm to accommodate the relative displacement between the anchor rod and the base plate.

[0025] Furthermore, the cement-based penetrating crystalline waterproof coating has a thickness of ≥1.5mm, which blocks capillary pores through the penetration and crystallization of active substances;

[0026] Furthermore, the reinforcing layer of the waterproof membrane on the base slab is made of polymer self-adhesive membrane.

[0027] Example 2

[0028] When implementing a waterproof structure for anti-buoyancy anchor pile heads, the construction steps are as follows: first, clean the pile head base surface → apply cement-based coating → lay waterproof membrane in layers → install waterstop strips and then inject asphalt sealant. The materials in this invention form an integral waterproof interface through physical bonding and chemical cross-linking, solving the industry problem of waterproof sealing for anti-buoyancy anchor pile heads and providing an efficient and reliable technical solution for waterproofing anti-buoyancy anchor pile heads.

[0029] This waterproof structure comprises the following layers from the inside out:

[0030] 1. Water-swellable rubber waterstop strip: tightly wrapped around the root of the anchor rod reinforcement, it expands more than 3 times its original volume when exposed to water, filling the micro gaps between the reinforcement and the concrete;

[0031] 2. Asphalt sealant layer: Injected from the bottom of the pile head to the waterstop strip to form a flexible seal with a thickness of ≥20mm to accommodate the relative displacement between the anchor rod and the base plate;

[0032] 3. Cement-based penetrating crystalline waterproof coating: Applied to the concrete surface of the pile head, with a thickness of ≥1.5mm, it blocks capillary pores through the penetration and crystallization of active substances;

[0033] 4. Waterproof membrane reinforcement layer for the base slab: High-polymer self-adhesive membrane is used, extending to a range of 300mm around the pile head, forming a continuous and sealed waterproof surface with the asphalt sealant.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-floating anchor rod waterproof construction, characterized by: This includes a cement-based penetrating crystalline waterproof coating, a reinforcing layer of waterproof membrane for the base slab, a water-swellable rubber waterstop strip, and an asphalt sealant layer. The cement-based penetrating crystalline waterproof coating is applied to the surface of the pile head concrete; the waterproof membrane reinforcement layer of the base plate covers the surface of the cement-based penetrating crystalline waterproof coating, with the coverage extending from the outer wall of the anchor bar to a perimeter range of 300mm; the rubber waterstop is tightly wrapped around the anchor bar, and expands more than 3 times in volume when exposed to water, filling the micro gaps between the bar and the concrete; the asphalt sealant layer is injected into the surface of the pile head concrete up to the waterstop.

2. An anti-floating anchor rod waterproof construction according to claim 1, characterized in that: The asphalt sealant layer is a flexible sealant with a thickness of ≥20mm, which can accommodate the relative displacement between the anchor bolt and the base plate.

3. An anti-floating anchor rod waterproof construction according to claim 1, characterized in that: The cement-based penetrating crystalline waterproof coating has a thickness of ≥1.5mm, and the capillary pores are blocked by the penetrating crystallization of active substances.

4. An anti-floating anchor rod waterproof construction according to claim 1, characterized in that: The reinforcing layer of the waterproof membrane on the base slab is made of polymer self-adhesive membrane.

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