A waterproof reinforced top sheet structure

Abstract

The application relates to a waterproof reinforced roof structure which can accurately position hidden defects through a crack development layer, and can form a dense repair body by chemically bonding a targeted repair layer with a concrete matrix, thereby significantly improving the self-waterproofing performance of the structure; a composite waterproof layer of a flexible polyurethane coating and a ternary ethylene-propylene coiled material is combined to construct a cooperative defense mechanism of active repair and double barrier, so that the concrete body and the waterproof material are integrated, the leakage path of the water-rich environment is effectively blocked, and the demand for later leakage repair is greatly reduced.

Description

Technical Field

[0001] This utility model relates to a waterproof and reinforced roof slab structure, belonging to the field of building construction technology. Background Technology

[0002] In the construction of subways, railways, and other transportation infrastructure, areas with well-developed water systems and geological types primarily consisting of water-rich soft clay and fine sand strata often have low soil strength and high groundwater levels. Therefore, underground concrete structures require a high level of waterproofing, typically Class I. The common approach is to use a combination of self-waterproofing concrete structure and a fully enclosed flexible waterproofing layer. Structural waterproofing generally relies primarily on the self-waterproofing of the concrete structure, supplemented by other waterproofing methods. However, in practice, the concrete itself is prone to cracking due to improper mix proportions, insufficient compaction, and inadequate curing. In water-rich soft soil areas, these cracks can easily lead to numerous leaks later on, creating significant quality risks and failing to effectively achieve the self-waterproofing effect of the concrete structure. Utility Model Content

[0003] The purpose of this invention is to provide a waterproof and reinforced roof structure to solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waterproof and reinforced roof structure, comprising, from bottom to top, a structural roof slab, a crack development layer, a targeted repair layer, a first waterproof layer, a second waterproof layer, an isolation layer, a concrete protective layer, and a backfill layer. The crack development layer is composed of a liquid polymer waterproof coating and adheres to the surface of the structural roof slab to develop cracks in the substrate. The targeted repair layer is composed of a liquid-powder mixed polymer waterproof coating and covers the crack areas marked by the development layer. The first waterproof layer is a solvent-free polyurethane waterproof coating layer and covers the targeted repair layer. The second waterproof layer is a EPDM butyl rubber self-adhesive waterproof membrane layer, and the second waterproof layer is bonded and composite with the first waterproof layer.

[0005] Furthermore, the thickness of the crack development layer is 0.3-0.5 mm, and the crack development layer forms a dense film layer that is bonded to the concrete matrix.

[0006] Furthermore, the coverage width of the targeted repair layer is greater than the width of the development crack.

[0007] Furthermore, the thickness of the second waterproof layer is greater than that of the first waterproof layer.

[0008] Furthermore, the isolation layer is a polyester nonwoven fabric, which is laid on top of the second waterproof layer.

[0009] Furthermore, the concrete protective layer is a fine aggregate concrete layer, and is internally reinforced with a steel mesh.

[0010] Furthermore, the backfill layer is a compacted clay layer.

[0011] Furthermore, the crack development layer and the targeted repair layer use polymer coatings with the same substrate.

[0012] The beneficial effects of this utility model are as follows: This application accurately locates hidden defects through the crack development layer and uses a targeted repair layer to chemically bond with the concrete matrix to form a dense repair body, which significantly improves the self-waterproofing performance of the structure; combined with the composite waterproof layer of flexible polyurethane coating and EPDM membrane, an active repair and dual barrier synergistic defense mechanism is constructed, which integrates the concrete body and the waterproof material into one, effectively blocking the leakage path in water-rich environments and greatly reducing the need for later leak sealing and maintenance.

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the waterproof reinforcement treatment of the top plate structure shown in one embodiment of this application. Detailed Implementation

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium.

[0019] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0020] Please refer to Figure 1 The waterproof reinforced roof structure shown in one embodiment of this application includes, from bottom to top, a structural roof slab 10, a crack development layer 20, a targeted repair layer 30, a first waterproof layer 40, a second waterproof layer 50, an isolation layer 60, a concrete protective layer 70, and a backfill layer 80. The crack development layer 20 is composed of a liquid polymer waterproof coating and is attached to the surface of the structural roof slab 10 to develop cracks in the substrate. The targeted repair layer 30 is composed of a liquid-powder mixed polymer waterproof coating and covers the crack areas marked by the development layer 20. The first waterproof layer 40 is a solvent-free polyurethane waterproof coating layer and covers the targeted repair layer 30. The second waterproof layer 50 is a EPDM butyl rubber self-adhesive waterproof membrane layer, and the second waterproof layer 50 is bonded and composite with the first waterproof layer 40.

[0021] In one embodiment, the thickness of the crack developing layer 20 is 0.3-0.5 mm, and the crack developing layer 20 forms a dense film layer bonded to the concrete matrix. The crack developing layer 20 is made of liquid polymer coating, which can still penetrate deep into the micro-cracks of concrete in a water-rich environment, form chemical bonds with the concrete matrix, and simultaneously develop the cracks and seal the water seepage channels.

[0022] In one embodiment, the coverage width of the targeted repair layer 30 is greater than the width of the developed crack. This design, with a coverage width greater than the crack width, completely covers the crack propagation area, preventing secondary cracking at the repair edges. The repair material forms a trapezoidal transition interface with the substrate, dispersing load stress. Compared to traditional full-coverage repair solutions, less material is used, making cost control easier.

[0023] In one embodiment, the second waterproof layer 50 is thicker than the first waterproof layer 40. The thinner first layer is better able to adapt to dynamic deformation of the concrete, while the thicker second layer is designed to resist penetration by backfill soil and rock. This thickness gradient design ensures that the membrane layer is fully embedded in the polyurethane coating, forming a mechanically interlocking interface.

[0024] In one embodiment, the isolation layer 60 is a polyester nonwoven fabric, which is laid on top of the second waterproof layer 50. The nonwoven fabric absorbs the curing shrinkage stress of the concrete protective layer 70, preventing the roll material from being pressed into the polyurethane coating and forming a "nail hole effect," and the fiber gaps allow water seepage to be discharged laterally, eliminating the risk of interlayer water leakage.

[0025] In one embodiment, the concrete protective layer 70 is a fine aggregate concrete layer with an internal steel mesh. The built-in steel mesh transforms concentrated loads into uniformly distributed loads, effectively preventing cracking of the concrete layer. The thickness of the fine aggregate concrete is 80 mm, which reduces temperature shrinkage and works in conjunction with the isolation layer 60 to control crack width.

[0026] In one embodiment, backfill layer 80 is a compacted clay layer. The permeability coefficient of the compacted clay is no greater than 1×10⁻⁶. -6 The flow rate of the water can effectively block plant roots from penetrating the soil and slow down the impact of rainstorm runoff.

[0027] In one embodiment, the crack developing layer 20 and the targeted repair layer 30 are polymer coatings with the same substrate. Specifically, the crack developing layer 20 is an SJ-21-II type liquid polymer waterproof coating, and the targeted repair layer 30 is an SJ-21-II type liquid-powder mixed polymer waterproof coating. Since both are polymer coatings with the same substrate, molecular-level interface fusion can be achieved during the repair process. The residual active monomers in the developing layer 20 participate in the curing reaction of the repair layer 30, improving the density of the repair in the crack area.

[0028] This application precisely locates hidden defects through a crack development layer and uses a targeted repair layer to chemically bond with the concrete matrix to form a dense repair body, significantly improving the structure's self-waterproofing performance. Combined with a composite waterproof layer of flexible polyurethane coating and EPDM membrane, it constructs a collaborative defense mechanism of active repair and dual barriers, making the concrete body and waterproof material integrated, effectively blocking the leakage path in water-rich environments, and greatly reducing the need for subsequent leak sealing and repair.

[0029] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A waterproof and reinforced roof slab structure, characterized in that, The waterproof reinforced roof structure includes, from bottom to top, a structural roof slab, a crack development layer, a targeted repair layer, a first waterproof layer, a second waterproof layer, an isolation layer, a concrete protective layer, and a backfill layer. The crack development layer is composed of a liquid polymer waterproof coating and adheres to the surface of the structural roof slab to develop cracks in the substrate. The targeted repair layer is composed of a liquid-powder mixed polymer waterproof coating and covers the crack areas marked by the development layer. The first waterproof layer is a solvent-free polyurethane waterproof coating layer and covers the targeted repair layer. The second waterproof layer is a EPDM butyl rubber self-adhesive waterproof membrane layer, which is bonded and composite with the first waterproof layer.

2. The waterproof and reinforced roof structure as described in claim 1, characterized in that, The thickness of the crack development layer is 0.3-0.5 mm, and the crack development layer forms a dense film layer that is bonded to the concrete matrix.

3. The waterproof and reinforced roof slab structure as described in claim 1, characterized in that, The coverage width of the targeted repair layer is greater than the width of the development crack.

4. The waterproof and reinforced roof structure as described in claim 1, characterized in that, The thickness of the second waterproof layer is greater than that of the first waterproof layer.

5. The waterproof, reinforced treated deck structure of claim 1, wherein, The isolation layer is a polyester nonwoven fabric, which is laid on top of the second waterproof layer.

6. The waterproof reinforced roof structure as described in claim 1, characterized in that, The concrete protective layer is a fine aggregate concrete layer, and is internally reinforced with steel mesh.

7. The waterproof reinforced roof structure as described in claim 1, characterized in that, The backfill layer is a compacted clay layer.

8. The waterproofed reinforced treated deck structure of any one of claims 1-7, wherein, The crack development layer and the targeted repair layer use polymer coatings with the same substrate.

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