A basement bottom plate waterproof system based on micro steel pipe pile reinforcement

Abstract

The utility model discloses a basement bottom plate waterproof system based on micro steel pipe pile reinforcement solves the problem of waterproof layer damage caused by micro steel pipe pile construction. Including column bent cap, its micro steel pipe pile construction area is equipped with enlarged platform above steel pipe pile, and the enlarged platform has water stop strip groove at the internal corner and is equipped with water-swelling water stop strip, and the enlarged platform is equipped with working surface excavation area, and there are micro steel pipe piles and pile filling materials in it, and the excavation surface and the surface of pile filling material have high-performance waterproof paint layer, and the excavation area is filled with shrinkage waterproof concrete. The enlarged platform prolongs the leakage water path, and the waterproof paint penetrates and crystallizes, the water stop strip swells when meeting water, and the waterproof concrete compensates shrinkage, forming a multi-level waterproof system, improving the waterproof reliability and durability of the basement bottom plate, and the construction quality is controllable and long-acting environmental protection, and is suitable for waterproof repair after micro steel pipe pile reinforcement.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing technology, and in particular to a basement floor waterproofing system based on micro steel pipe pile reinforcement. It is mainly used to solve the problem of repair and reconstruction after the original waterproofing system is damaged during the construction of micro steel pipe pile reinforcement of basement floor. Background Technology

[0002] With the continuous development of urban construction, the development and utilization of underground space is becoming increasingly widespread. As an important component of building structure, the waterproofing performance of basements directly affects the overall quality and service life of buildings. In the construction and renovation of basements, micro-steel pipe pile reinforcement technology has been widely used due to its advantages such as convenient construction and strong adaptability, in order to enhance the foundation bearing capacity and improve structural stability.

[0003] However, the construction of micro-steel pipe piles inevitably requires excavation work in the basement floor slab, which severely damages the original waterproofing system. Traditional basement waterproofing systems mainly rely on the waterproofing properties of the concrete itself, as well as additional waterproof membranes and coatings. Concrete's self-waterproofing, through adjusting the concrete mix ratio and adding waterproofing agents, can, to some extent, prevent groundwater infiltration; waterproof membranes and coatings form a continuous waterproof layer on the concrete surface, further enhancing the waterproofing effect. However, during micro-steel pipe pile construction, excavation work disrupts the integrity of the concrete, causing the capillary pores and micro-cracks inside the concrete to connect, reducing its self-waterproofing capacity; at the same time, it cuts through the waterproof membrane and damages the waterproof coating layer, resulting in gaps and leaks in the waterproofing layer. Groundwater can easily seep into the basement through these damaged areas, causing leakage problems.

[0004] Currently, existing technologies have many shortcomings in addressing the repair of waterproofing systems damaged after micro-steel pipe pile construction. The traditional method of using waterstop steel plates in post-cast strips / construction joints of newly built cast-in-place foundations and foundation slabs, while offering good waterproofing, suffers from high costs and construction difficulties in the post-construction repair scenario of micro-steel pipe piles. The installation of waterstop steel plates requires precise positioning and welding, demanding high technical skills from construction personnel, and incurring relatively high material and labor costs. While using waterstop strips instead of waterstop steel plates is relatively simpler, their waterproofing effect is far inferior. Their expansion performance is significantly affected by environmental factors, prone to premature expansion and uneven expansion, failing to effectively prevent groundwater leakage. High-pressure grouting technology, used later, is a remedial measure after leakage has occurred, only sealing existing leakage channels and unable to build an effective comprehensive waterproof barrier in the early stages. Furthermore, the grouting effect is greatly affected by geological conditions and construction techniques, introducing a degree of uncertainty.

[0005] In conclusion, existing waterproofing and repair technologies cannot meet the long-term waterproofing needs of basements after the construction of micro steel pipe piles. There is an urgent need for an innovative, efficient, and reliable waterproofing system to solve the basement leakage problem and improve the functionality and durability of the basement. Utility Model Content

[0006] The purpose of this utility model is to provide a basement floor waterproofing system based on micro steel pipe pile reinforcement. With the help of scientific and reasonable structural design and material selection, it effectively solves the problem of damage to the basement floor waterproofing system caused by micro steel pipe pile construction, builds a reliable and long-lasting waterproofing system, and improves the waterproofing performance and structural durability of the basement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waterproofing system for basement floor slabs reinforced with micro-steel pipe piles, comprising a column basement, a micro-steel pipe pile construction area within the column basement, an enlarged platform above the micro-steel pipe piles within the micro-steel pipe pile construction area, a water-stop groove at the inner corner of the enlarged platform, a water-swellable water-stop strip installed in the water-stop groove, a chiselable area for the steel pipe pile construction work surface on the enlarged platform, micro-steel pipe piles and pile filling material within the chiselable area, a high-performance waterproof coating layer on the surface of the chiselable surface and the pile filling material, and supplementary shrinkage waterproof concrete filling the chiselable area.

[0008] As a further improvement to the technical solution of this utility model, the enlarged platform above the steel pipe pile is a square with a side length of D+a or a circle with a diameter of D+a, where the value of a ranges from 300 to 500 mm; the width f of the waterstop groove is the width of the waterstop plus twice the design thickness of the high-performance waterproof coating, and the height k is half the design thickness of the high-performance waterproof coating.

[0009] As a further improvement to the technical solution of this utility model, the high-performance waterproof coating layer is a cement-based penetrating crystalline waterproof coating layer, or a polyurethane or epoxy polymer waterproof coating; the coating application rate is 1.0-1.8 kg / m². 2 .

[0010] As a further improvement to the technical solution of this utility model, the water-swellable waterstop strip is a slow-expansion type waterstop strip, and a reinforcing fiber mesh is provided inside the waterstop strip.

[0011] As a further improvement to the technical solution of this utility model, the supplementary shrinkage waterproof concrete is mixed with a high-performance expansion crack-resistant agent and a high-performance waterproof additive. The dosage of the high-performance expansion crack-resistant agent is 8-12%, and the dosage of the high-performance waterproof additive is 0.8-1% of the cement weight.

[0012] As a further improvement to the technical solution of this utility model, the surface roughness of the excavation surface and the pile filling material reaches Ra30-50μm.

[0013] This utility model has the following beneficial effects:

[0014] This invention extends the leakage path by setting an enlarged platform and a waterstop groove above the micro steel pipe piles in the construction area of ​​the column foundation, providing an installation position for the water-swellable waterstop strip. Combined with a high-performance waterproof coating layer and supplementary shrinkage waterproof concrete, a multi-layer waterproof system is formed, which effectively improves the waterproof performance of the basement floor slab.

[0015] Cement-based penetrating crystalline high-performance waterproof coatings can form water-insoluble crystals in concrete, sealing micro-cracks and pores, thereby enhancing the concrete's impermeability and self-healing ability, ensuring that the new waterproof layer can seamlessly integrate with the original structure to form a complete waterproof barrier.

[0016] By embedding water-swellable waterstop strips in the grooves of the waterstop strips, when the seepage volume is large or the leakage gaps are large, the high expansion performance of the waterstop strips upon contact with water can effectively prevent basement leakage into the basement. The double waterproofing design of the waterstop strips not only enhances the effectiveness of the waterproof barrier but also improves the waterproofing reliability of the building during long-term use.

[0017] Shrinkage-reducing waterproof concrete exhibits a micro-expansion effect during hardening, compensating for shrinkage caused by hydration and preventing cracks in newly poured areas. Furthermore, the chemical components of the additives penetrate deep into the concrete, reacting with cement hydration substances to form water-insoluble crystals that permanently seal cracks, capillary pores, and voids in the concrete structure, thereby ensuring the integrity and durability of the structure. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the micro steel pipe pile foundation reinforcement model of this utility model;

[0020] Figure 2 This is a schematic diagram of the micro steel pipe pile reinforced foundation of this utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the micro steel pipe pile reinforced foundation of this utility model;

[0022] Figure 4 This is a partial plan view of the excavation location of the miniature steel pipe pile of this utility model;

[0023] Figure 5 This is a partial three-dimensional schematic diagram of the excavation location of the miniature steel pipe pile of this utility model;

[0024] Figure 6 This is a schematic diagram of the excavation process for the construction of the miniature steel pipe pile of this utility model; where: D - diameter of steel sheet pile, (D+a) - width of the enlarged platform excavation, C - height of the enlarged platform excavation, K - height of the waterstop groove excavation, f - width of the waterstop groove excavation, e = a / 2;

[0025] Figure 7 This is a cross-sectional view of the excavation location of the miniature steel pipe pile of this utility model; where: D - diameter of steel sheet pile, (D+a) - width of the enlarged platform excavation, C - height of the enlarged platform excavation, (C+h) - elevation of the pile top positioning, (C+h+d) - elevation of the steel pipe pile filling material positioning;

[0026] Figure 8 This is a structural schematic diagram of a basement floor waterproofing system based on micro steel pipe pile reinforcement according to this utility model.

[0027] In the attached diagram: 1-Basement column; 2-Basement floor slab; 3-Column foundation; 4-Micro steel pipe pile excavation work surface; 5-Enlarged platform above the steel pipe pile; 6-Excavation area of ​​the steel pipe pile construction work surface; 7-Micro steel pipe pile; 8-Waterstop groove; 9-Steel pipe pile filling material; 10-High-performance waterproof coating layer; 11-Water-swellable waterstop strip; 12-Supplemental shrinkage waterproof concrete. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] In this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figures 1 to 8 A waterproofing system for basement floor slabs reinforced with micro steel pipe piles includes a column basement 3, a micro steel pipe pile construction area within the column basement 3, an enlarged platform 5 above the micro steel pipe piles within the micro steel pipe pile construction area, a water-stop groove 8 at the internal corner of the enlarged platform 5, a water-swellable water-stop strip 11 installed in the water-stop groove 8, a steel pipe pile construction work surface excavation area 6 on the enlarged platform 5, micro steel pipe piles 7 and pile filling material 9 within the construction work surface excavation area 6, a high-performance waterproof coating layer 10 on the surface of the excavation surface and the pile filling material 9, and supplementary shrinkage waterproof concrete 12 filling the excavation area.

[0034] Specifically, in this embodiment, the enlarged platform 5 above the steel pipe pile is a square with a side length of D+a or a circle with a diameter of D+a, where a ranges from 300 to 500 mm; the width f of the waterstop groove 8 is the width of the waterstop plus twice the design thickness of the high-performance waterproof coating, and the height k is half the design thickness of the high-performance waterproof coating.

[0035] Specifically, in this embodiment, the high-performance waterproof coating layer 10 is a cement-based penetrating crystalline waterproof coating layer, or a polyurethane or epoxy polymer waterproof coating; the coating application rate is 1.0-1.8 kg / m². 2 .

[0036] Specifically, in this embodiment, the water-swellable waterstop strip 11 is a slow-expanding waterstop strip, and a reinforcing fiber mesh is provided inside the waterstop strip.

[0037] Specifically, in this embodiment, the supplementary shrinkage waterproof concrete 12 incorporates a high-performance expansion crack-resistant agent and a high-performance waterproof additive. The dosage of the high-performance expansion crack-resistant agent is 8-12%, and the dosage of the high-performance waterproof additive is 0.8-1% of the cement weight.

[0038] Specifically, in this embodiment, the surface roughness of the excavation surface and the pile filling material 9 reaches Ra30-50μm.

[0039] The working principle of this utility model:

[0040] In the construction area of ​​the micro steel pipe piles within the column base 3, an enlarged platform 5 and a water-stop groove 8 are excavated above the steel pipe piles. Water-swellable water-stop strips 11 are installed, micro steel pipe piles 7 and pile filling material 9 are constructed, and a high-performance waterproof coating layer 10 is applied to the excavated surface and the surface of the pile filling material 9. Finally, supplementary shrinkage waterproof concrete 12 is poured to form a multi-layer waterproof system, effectively preventing the leakage of groundwater.

[0041] In summary, this utility model has the following beneficial effects:

[0042] This invention extends the leakage path by setting an enlarged platform and a waterstop groove above the micro steel pipe piles in the construction area of ​​the column foundation, providing an installation position for the water-swellable waterstop strip. Combined with a high-performance waterproof coating layer and supplementary shrinkage waterproof concrete, a multi-layer waterproof system is formed, which effectively improves the waterproof performance of the basement floor slab.

[0043] Cement-based penetrating crystalline high-performance waterproof coatings can form water-insoluble crystals in concrete, sealing micro-cracks and pores, thereby enhancing the concrete's impermeability and self-healing ability, ensuring that the new waterproof layer can seamlessly integrate with the original structure to form a complete waterproof barrier.

[0044] By embedding water-swellable waterstop strips in the grooves of the waterstop strips, when the seepage volume is large or the leakage gaps are large, the high expansion performance of the waterstop strips upon contact with water can effectively prevent basement leakage into the basement. The double waterproofing design of the waterstop strips not only enhances the effectiveness of the waterproof barrier but also improves the waterproofing reliability of the building during long-term use.

[0045] Shrinkage-reducing waterproof concrete exhibits a micro-expansion effect during hardening, compensating for shrinkage caused by hydration and preventing cracks in newly poured areas. Furthermore, the chemical components of the additives penetrate deep into the concrete, reacting with cement hydration substances to form water-insoluble crystals that permanently seal cracks, capillary pores, and voids in the concrete structure, thereby ensuring the integrity and durability of the structure.

[0046] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A waterproofing system for basement floor slabs reinforced with micro steel pipe piles, characterized in that: The system includes a column base, within which a micro steel pipe pile construction area is provided. Within the micro steel pipe pile construction area, an enlarged platform is provided above the steel pipe piles. A water-stop groove is provided at the inner corner of the enlarged platform above the steel pipe piles, and a water-swellable water-stop strip is installed within the groove. A steel pipe pile construction work surface excavation area is provided on the enlarged platform above the steel pipe piles. The excavated area contains micro steel pipe piles and pile filling material. A high-performance waterproof coating layer is applied to the surface of the micro steel pipe piles and pile filling material. The excavated area is filled with shrinkage-reducing waterproof concrete.

2. The basement floor waterproofing system based on micro-steel pipe pile reinforcement according to claim 1, characterized in that, The enlarged platform above the steel pipe pile is a square with side length D + a or a circle with diameter D + a, where a ranges from 300 to 500 mm; the width f of the waterstop groove is the width of the waterstop plus twice the design thickness of the high-performance waterproof coating, and the height k is half the design thickness of the high-performance waterproof coating.

3. The basement floor waterproofing system based on micro-steel pipe pile reinforcement according to claim 2, characterized in that: The high-performance waterproof coating layer is a cement-based penetrating crystalline waterproof coating layer, or a polyurethane or epoxy polymer waterproof coating; the coating application rate is 1.0 - 1.8 kg / m².

4. The basement floor waterproofing system based on micro-steel pipe pile reinforcement according to claim 3, characterized in that: The water-swellable waterstop strip is a slow-expansion type waterstop strip, and a reinforcing fiber mesh is installed inside the waterstop strip.

5. A basement floor waterproofing system based on micro-steel pipe pile reinforcement according to claim 1, characterized in that: The surface roughness of the micro steel pipe piles and pile filling materials reaches Ra30-50μm.

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