Roofing through-wall pipe waterproof joint structure and construction method

Abstract

The application discloses a kind of roof penetrates plate pipeline waterproof node structure and construction method;The structure includes base component, pre-buried sleeve component, gap filling layer, roof structure layer, composite waterproof layer, pipeline insulation layer, top fastening assembly, facade protection layer and sealing assembly.Wing ring waterproof steel sleeve is embedded in roof structure plate, and pipeline and sleeve gap are filled with water-swelling sealing strip.Roof structure layer is sequentially TPO waterproof roll, insulation layer and fine stone concrete leveling layer from bottom to top;Additional layer and self-adhesive SBS waterproof layer are arranged on it, which are laid along horizontal plane and folded along sleeve facade;Pipeline insulation layer is covered on the outer side of SBS layer folding part, and outer side is wrapped with waterproof mortar outer wrapping line foot;Top is fastened with flat steel hoop and bolt, and each junction is filled with building sealant.The application effectively solves the problem of roof pipeline plate penetration leakage through rigid and flexible combination and multi-layer defense structure, and has the advantages of reliable waterproof, long-lasting sealing, controllable construction quality.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a waterproof joint structure for through-slab pipes in a roof and its construction method. Background Technology

[0002] In building roofing projects, pipe penetration points are a weak point in waterproofing. Traditional methods often use simple sealant filling or ordinary sleeves, which are insufficient to cope with the stress and displacement caused by temperature changes, structural settlement, and long-term wind and rain erosion. In existing technologies, the waterproofing layer is prone to cracking and peeling at the pipe roots, and the sealing material is prone to aging and failure, leading to frequent leakage problems and seriously affecting the building's functionality and structural durability.

[0003] Therefore, there is an urgent need for a roof pipe penetration waterproofing and sealing solution with distinct structural layers, scientific material matching, rigid-flexible combination, and multiple layers of protection to effectively solve the leakage problem at the pipe penetration joints in the roof. Summary of the Invention

[0004] This invention aims to overcome the shortcomings of existing technologies and provide a waterproof joint structure for pipe penetrations in roof slabs and its construction method. This structure combines rigid anchoring with flexible sealing by setting multiple layers of waterproofing and sealing, forming a multi-layered, synergistic waterproofing system that effectively disperses stress and adapts to deformation, thereby achieving a long-term, reliable waterproof sealing effect.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A waterproof joint structure for pipes penetrating roof slabs includes:

[0007] The base component includes a bottom formwork and a roof structure panel disposed above the bottom formwork;

[0008] An embedded sleeve assembly includes a through-slab pipe that passes vertically through the roof structure slab, and a waterproof steel sleeve with a wing ring fitted outside the through-slab pipe, wherein the lower wing ring of the waterproof steel sleeve with a wing ring is embedded in the roof structure slab.

[0009] The gap filling layer is a water-swellable waterstop strip that fills the annular gap between the through-plate pipe and the winged waterproof steel sleeve.

[0010] The roof construction layer is laid on the upper surface of the roof structure board and covers the root of the waterproof steel sleeve with wing ring. The roof construction layer includes, from bottom to top, TPO waterproof membrane, roof insulation layer and first fine stone concrete leveling layer.

[0011] A composite waterproof layer is provided on the upper surface of the first fine stone concrete leveling layer, including a self-adhesive SBS waterproof layer laid along the horizontal plane and extended upward along the vertical plane of the waterproof steel sleeve with wing ring, and an additional layer.

[0012] Pipe insulation layer, which covers the outside of the self-adhesive SBS waterproof layer and the upper part of the additional layer;

[0013] A top fastening assembly, comprising a flat steel hoop and bolts for fastening the pipe insulation layer;

[0014] Facade protective layer, wherein the facade protective layer is a waterproof mortar outer molding wrapped around the outside of the pipeline insulation layer, the top fastening components, the self-adhesive SBS waterproof layer and the additional layer facade;

[0015] And a sealing component, which is a building sealant used to fill the upper and lower edges of the flat steel hoop and bolts, and at the inside corner where the waterproof mortar outer molding meets the roof.

[0016] Preferably, the height of the waterproof steel sleeve with wing ring is higher than the upper surface of the first fine stone concrete leveling layer, forming a vertical wall for closing the opening.

[0017] Preferably, the self-adhesive SBS waterproof layer and the additional layer have an arc-shaped transition at the pipe root and extend upward to the top of the waterproof steel sleeve with wing ring and cover the side wall of the through-plate pipe.

[0018] Preferably, the diameter of the through-plate pipe is no more than 300 mm.

[0019] Preferably, the roof structure layer further includes a second fine aggregate concrete leveling layer or a fine aggregate concrete protective layer disposed between the self-adhesive SBS waterproof layer and the additional layer and the waterproof mortar outer molding.

[0020] In addition, this invention also discloses a construction method for a waterproof joint structure for pipes penetrating roof slabs, which includes the following steps based on the above-mentioned waterproof joint structure for pipes penetrating roof slabs:

[0021] S1: When pouring the roof structure slab and bottom formwork, pre-embed waterproof steel sleeves with wing rings;

[0022] S2: Install the through-plate pipe and tightly fill the annular gap between the through-plate pipe and the waterproof steel sleeve with wing ring with water-swellable sealing strip.

[0023] S3: Carry out the construction of each functional layer of the roof, lay TPO waterproof membrane on the roof structure board in sequence, lay the roof insulation layer, and pour the first fine stone concrete leveling layer so that the first fine stone concrete leveling layer covers the roof insulation layer and wraps the root of the waterproof steel sleeve with wing ring.

[0024] S4: A self-adhesive SBS waterproof layer and an additional layer are laid on the surface of the first fine stone concrete leveling layer and the vertical surface of the waterproof steel sleeve with wing ring. The self-adhesive SBS waterproof layer and the additional layer extend beyond the pipe root set range and are rounded at the inside and outside corners.

[0025] S5: A pipe insulation layer is provided on the outside of the self-adhesive SBS waterproof layer and the additional layer, and the pipe insulation layer is fastened to the through-plate pipe using the top fastening component.

[0026] S6: Apply waterproof mortar to the outside of the pipe insulation layer, the top fastening assembly, the self-adhesive SBS waterproof layer and the additional layer to wrap the molding.

[0027] S7: Inject building sealant into the upper and lower openings of the top fastening assembly and at the junction of the waterproof mortar outer molding and the roof structure layer to form a flexible seal;

[0028] S8: Maintenance and Inspection.

[0029] Preferably, in step S4, the length of each side of the self-adhesive SBS waterproof layer and the additional layer extending beyond the pipe root is not less than 250mm.

[0030] Preferably, between step S4 and step S5, a step of pouring a second fine aggregate concrete leveling layer or a fine aggregate concrete protective layer is also included.

[0031] Preferably, in step S6, a special mold for roof cement mortar is used to stretch and apply the waterproof mortar outer molding at the pipe root, and the surface of the waterproof mortar outer molding is smooth and the slope is straight.

[0032] Compared with the prior art, the present invention has at least one of the following advantages or beneficial effects:

[0033] 1. Multiple layers of protection, combining rigidity and flexibility: The structure integrates the rigid anchoring of the waterproof steel sleeve with wing ring, the flexible filling of the water-swellable waterstop strip, the large-area waterproofing of the TPO waterproof membrane, the joint reinforcement of the self-adhesive SBS waterproof layer and additional layers, the elastic sealing of the building sealant, and the mechanical fixing of the flat steel hoop and bolts, forming a multi-layered waterproof sealing system that can effectively adapt to temperature difference deformation and structural settlement.

[0034] 2. Clear structure and controllable construction: The functions of each level are clearly defined, the material specifications and construction requirements are specific, and the construction steps are interconnected and logically clear, providing operable implementation guidance and helping to ensure construction quality.

[0035] 3. Durable and reliable: The bottom water-swellable sealing strip and the top building sealant form an elastic seal from top to bottom. The middle TPO and SBS composite waterproof layer provides the main waterproof function. The pipe insulation layer and waterproof layer are set up in a coordinated manner and protect each other, which significantly improves the long-term durability of the joint in complex environments.

[0036] 4. Wide applicability: The structure and method are based on a clear principle and are applicable to various roof pipes with diameters ≤ 300mm. They can be adapted to the specific pipe material, diameter, and roof structure in the project, making them highly valuable for promotion and application. Attached Figure Description

[0037] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their focus is on illustrating the gist of the invention.

[0038] Figure 1 This is a cross-sectional schematic diagram of the waterproof sealing structure for through-wall pipes in the roof according to the present invention.

[0039] In the diagram: 1. Bottom formwork, 2. Roof structural slab, 3. Waterproof steel sleeve with wing ring, 4. Through-slab pipe, 5. Water-swellable waterstop strip, 6. Building sealant, 7. TPO waterproof membrane, 8. Roof insulation layer, 9. Fine stone concrete leveling layer, 10. SBS waterproof layer and additional layer, 11. Waterproof mortar outer molding, 12. Pipe insulation layer, 13. Flat steel hoop and bolts.

[0040] Specific implementation methods

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "interchange," "sleeve," "connect," "join," and "tightly adhered" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] Example 1

[0045] Please see Figure 1 As shown, the present invention provides a waterproof joint structure for a roof through-slab pipe, including a bottom formwork 1, a roof structural slab 2, a waterproof steel sleeve with a wing ring 3, a through-slab pipe 4, a water-swellable waterstop strip 5, a building sealant 6, a TPO waterproof membrane 7, a roof insulation layer 8, a first fine stone concrete leveling layer 9, a self-adhesive SBS waterproof layer and an additional layer 10, waterproof mortar outer molding 11, a pipe insulation layer 12, and flat steel hoops and bolts 13.

[0046] like Figure 1 As shown, the base components, from bottom to top, include a bottom mold 1 and a roof structure slab 2 placed above the bottom mold 1. The bottom mold 1 is used for casting and shaping the roof structure slab 2, which is a reinforced concrete slab and serves as the load-bearing foundation for the entire roof system.

[0047] like Figure 1 As shown, the pre-embedded sleeve assembly includes a through-slab pipe 4 that vertically passes through the roof structural slab 2, and a winged waterproof steel sleeve 3 fitted over the through-slab pipe 4. The lower wing of the winged waterproof steel sleeve 3 is pre-embedded within the roof structural slab 2, and the wing is anchored integrally with the concrete structure, which enhances the connection strength between the sleeve and the structural slab and forms the first rigid waterproof barrier. The height of the winged waterproof steel sleeve 3 is higher than the upper surface of the first fine stone concrete leveling layer 9, forming a vertical wall for closure, providing a reliable vertical base for the subsequent upward closure of the waterproof layer.

[0048] like Figure 1 As shown, the gap filling layer is a water-swellable waterstop strip 5 that fills the annular gap between the through-plate pipe 4 and the winged waterproof steel sleeve 3. The water-swellable waterstop strip 5 expands in volume when exposed to water, which can tightly fill the gap between the pipe and the sleeve, playing a preliminary flexible water-blocking role and effectively preventing groundwater or rainwater from seeping upward along the outer wall of the pipe.

[0049] like Figure 1As shown, the roof structural layer is laid on the upper surface of the roof structural slab 2 and covers the root of the waterproof steel sleeve 3 with wing ring. From bottom to top, it includes TPO waterproof membrane 7, roof insulation layer 8, and first fine stone concrete leveling layer 9. TPO waterproof membrane 7 (thermoplastic polyolefin waterproof membrane) is laid on the upper surface of the roof structural slab 2 as the bottom large-area waterproof layer, possessing excellent weather resistance, UV resistance, and high and low temperature resistance. The roof insulation layer 8 is laid on top of the TPO waterproof membrane 7 and can be made of extruded polystyrene board, sprayed polyurethane, or other insulation materials. Care should be taken to avoid the sleeve location during laying or to cut and adapt it. The first fine stone concrete leveling layer 9 is poured on top of the roof insulation layer 8, covering the insulation layer and wrapping the root of the waterproof steel sleeve 3 with wing ring, forming a solid base layer and providing a flat and solid working surface for the upper waterproofing layer.

[0050] like Figure 1 As shown, the composite waterproof layer is applied to the upper surface of the first fine aggregate concrete leveling layer 9, comprising a self-adhesive SBS waterproof layer and an additional layer 10, which are laid horizontally and folded upwards along the vertical surface of the waterproof steel sleeve 3 with wing rings. The self-adhesive SBS waterproof layer and the additional layer 10 form a rounded transition at the pipe root to avoid stress concentration at the corners, which could lead to cracking of the membrane. The self-adhesive SBS waterproof layer and the additional layer 10 extend upwards to the top of the waterproof steel sleeve 3 with wing rings and cover the side wall of the through-pipe 4, ensuring sufficient coverage height of the waterproof layer in the vertical direction. The self-adhesive SBS waterproof layer and the additional layer 10 need to extend beyond the pipe root by a certain range, typically not less than 250mm on each side, to enhance the waterproofing capability of the area surrounding the pipe root.

[0051] like Figure 1 As shown, the pipe insulation layer 12 covers the outside of the self-adhesive SBS waterproof layer and the upper part of the additional layer 10, and plays a role in heat preservation and protection for the part of the pipe 4 that passes through the roof. At the same time, its outer side will be wrapped with waterproof mortar molding 11 to form an integrated protection of heat preservation and waterproofing.

[0052] like Figure 1 As shown, the top fastening assembly includes a flat steel hoop and bolts 13 for fastening the pipe insulation layer 12. The flat steel hoop is made of -30×3 flat steel and is fastened with stainless steel bolts to reliably fix the pipe insulation layer 12 to the through-plate pipe 4 and prevent the insulation layer from slipping and falling off.

[0053] like Figure 1 As shown, the facade protective layer consists of waterproof mortar trim 11 wrapped around the exterior of the pipe insulation layer 12, the top fastening components, the self-adhesive SBS waterproof layer, and the additional layer 10. The waterproof mortar trim 11 is formed at the pipe root using a special roof cement mortar mold, resulting in a smooth surface and straight slope, which facilitates rainwater drainage. At the same time, it provides mechanical protection for the internal waterproof and insulation layers, preventing damage from external forces.

[0054] like Figure 1 As shown, the sealing component is a building sealant 6 applied to the upper and lower edges of the flat steel hoop and bolts 13, as well as the inside corner where the waterproof mortar outer molding 11 meets the roof. The building sealant 6 forms the final flexible sealing barrier, effectively sealing any possible micro-gaps and ensuring the overall water tightness of the joint.

[0055] Example 2

[0056] Please see Figure 1 As shown, the present invention provides a construction method for a waterproof joint structure for pipes penetrating roof slabs, comprising the following steps:

[0057] S1. Embedded Sleeves: When pouring the roof structural slab 2 and bottom formwork 1, pre-embed waterproof steel sleeves 3 with wing rings to ensure accurate positioning and secure fixing. The sleeves should be reliably connected to the structural slab reinforcement (e.g., by welding or binding) to prevent displacement during concrete pouring. The centerline of the sleeve should be consistent with the design axis of the through-slab pipe 4.

[0058] S2. Pipe Installation and Sealing: Install the through-plate pipe 4, and tightly fill the annular gap between the through-plate pipe 4 and the winged waterproof steel sleeve 3 with water-swellable sealing strips 5. During filling, ensure that the sealing strips are evenly distributed and densely packed within the annular gap, providing initial flexible water-blocking effect.

[0059] S3. Construction of functional roof layers: Construction of each functional layer of the roof, specifically including:

[0060] S31. Lay TPO waterproof membrane 7 on the roof structural slab 2 as the base layer for large-area waterproofing. The overlap joints of the TPO membrane can be welded using hot air welding to form a high-strength overall seal.

[0061] S32. Lay the roof insulation layer 8 (such as extruded polystyrene board, sprayed polyurethane, etc.). When laying, pay attention to avoiding the sleeve position or cut the insulation board to fit, and ensure that the roof insulation layer is tightly attached to the root of the sleeve.

[0062] S33. Pour the first fine stone concrete leveling layer 9 so that the first fine stone concrete leveling layer 9 covers the roof insulation layer 8 and wraps the root of the waterproof steel sleeve 3 with wing ring, forming a solid base layer.

[0063] S4. Waterproofing Reinforcement: A self-adhesive SBS waterproofing layer and additional layer 10 are applied to the surface of the first fine aggregate concrete leveling layer 9 and the vertical surface of the waterproof steel sleeve 3 with wing rings. The self-adhesive SBS waterproofing layer and additional layer 10 extend beyond the pipe root area (usually no less than 250mm on each side), and rounded corners are used to ensure no hollow areas or curled edges. During application, the layer should be compacted and leveled to ensure a tight bond between the membrane and the substrate.

[0064] S5. Install pipe insulation layer: Install pipe insulation layer 12 on the outside of the self-adhesive SBS waterproof layer and the upper part of the additional layer 10. Secure pipe insulation layer 12 to the through pipe 4 using the top fastening components (flat steel hoop and bolts 13). The flat steel hoop is made of -30×3 flat steel and is fastened with stainless steel bolts to ensure that the insulation layer is firmly installed.

[0065] S6. Construction of External Molding: Apply waterproof mortar external molding 11 to the outside of the pipe insulation layer 12, the top fastening components, the self-adhesive SBS waterproof layer, and the additional layer 10. Use a special roof cement mortar mold to stretch and apply the waterproof mortar external molding 11 at the pipe root. The molding should have a smooth surface and a straight slope to facilitate rainwater drainage and provide effective mechanical protection for the internal waterproof and insulation layers.

[0066] S7. Inject sealant: Inject building sealant 6 at the top and bottom of the top fastening components (flat steel hoop and bolt 13) and at the junction of the waterproof mortar outer molding 11 and the roof structural layer to form a flexible seal. The sealant should be fully filled and firmly bonded to the base layer, ensuring no air bubbles or gaps.

[0067] S8. Curing and Inspection: Protect the completed areas to prevent damage from subsequent processes. After all materials have reached the specified strength or curing time, conduct a comprehensive visual and functional inspection (such as a water spray test) to ensure that the waterproofing effect of the joints meets the design requirements.

[0068] Through the above-mentioned "rigid-flexible combination and multi-layered protection" structure and construction method, the present invention can effectively adapt to temperature difference deformation, completely solve the problem of roof pipe leakage, and has the advantages of reliable waterproofing, long-lasting sealing, controllable construction quality, and easy maintenance.

[0069] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0070] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A waterproof joint structure for pipes penetrating roof slabs, characterized in that, include: The base component includes a bottom formwork and a roof structure panel disposed above the bottom formwork; An embedded sleeve assembly includes a through-slab pipe that passes vertically through the roof structure slab, and a waterproof steel sleeve with a wing ring fitted outside the through-slab pipe, wherein the lower wing ring of the waterproof steel sleeve with a wing ring is embedded in the roof structure slab. The gap filling layer is a water-swellable waterstop strip that fills the annular gap between the through-plate pipe and the winged waterproof steel sleeve. The roof construction layer is laid on the upper surface of the roof structure board and covers the root of the waterproof steel sleeve with wing ring. The roof construction layer includes, from bottom to top, TPO waterproof membrane, roof insulation layer and first fine stone concrete leveling layer. A composite waterproof layer is provided on the upper surface of the first fine stone concrete leveling layer, including a self-adhesive SBS waterproof layer laid along the horizontal plane and extended upward along the vertical plane of the waterproof steel sleeve with wing ring, and an additional layer. Pipe insulation layer, which covers the outside of the self-adhesive SBS waterproof layer and the additional layer; A top fastening assembly, comprising a flat steel hoop and bolts for fastening the pipe insulation layer; The facade protective layer is a waterproof mortar outer molding wrapped around the outside of the facade of the pipe insulation layer, the top fastening components, the self-adhesive SBS waterproof layer, and the additional layer. And a sealing component, which is a building sealant used to fill the upper and lower edges of the flat steel hoop and bolts, and at the inside corner where the waterproof mortar outer molding meets the roof.

2. The waterproof joint structure for through-slab pipes in roofs according to claim 1, characterized in that, The height of the waterproof steel sleeve with wing ring is higher than the upper surface of the first fine stone concrete leveling layer, forming a vertical wall for closing the opening.

3. The waterproof joint structure for roof penetration pipes according to claim 1, characterized in that, The self-adhesive SBS waterproof layer and additional layer transition in an arc shape at the pipe root and extend upward to the top of the waterproof steel sleeve with wing ring and cover the side wall of the through-plate pipe.

4. The waterproof joint structure for roof through-slab pipes according to claim 1, characterized in that, The diameter of the through-plate pipe is no more than 300mm.

5. The waterproof joint structure for roof through-slab pipes according to claim 1, characterized in that, The roof structure layer also includes a second fine aggregate concrete leveling layer or a fine aggregate concrete protective layer disposed between the self-adhesive SBS waterproof layer and the additional layer and the waterproof mortar outer molding.

6. A construction method for a waterproof joint structure for pipes penetrating roof slabs, characterized in that, The roof through-slab waterproof joint structure as described in any one of claims 1 to 5 includes the following steps: S1: When pouring the roof structure slab and bottom formwork, pre-embed waterproof steel sleeves with wing rings; S2: Install the through-plate pipe and tightly fill the annular gap between the through-plate pipe and the waterproof steel sleeve with wing ring with water-swellable sealing strip. S3: Carry out the construction of each functional layer of the roof, lay TPO waterproof membrane on the roof structure board in sequence, lay the roof insulation layer, and pour the first fine stone concrete leveling layer so that the first fine stone concrete leveling layer covers the roof insulation layer and wraps the root of the waterproof steel sleeve with wing ring. S4: A self-adhesive SBS waterproof layer and an additional layer are laid on the surface of the first fine stone concrete leveling layer and the vertical surface of the waterproof steel sleeve with wing ring. The self-adhesive SBS waterproof layer and the additional layer extend beyond the pipe root set range and are rounded at the inside and outside corners. S5: A pipe insulation layer is provided on the outside of the self-adhesive SBS waterproof layer and the additional layer, and the pipe insulation layer is fastened to the through-plate pipe using the top fastening component. S6: Apply waterproof mortar to the outside of the pipe insulation layer, the top fastening assembly, the self-adhesive SBS waterproof layer and the additional layer to wrap the molding. S7: Inject building sealant into the upper and lower openings of the top fastening assembly and at the junction of the waterproof mortar outer molding and the roof structure layer to form a flexible seal; S8: Maintenance and Inspection.

7. The construction method according to claim 6, characterized in that, In step S4, the length of each side of the self-adhesive SBS waterproof layer and the additional layer extending beyond the pipe root shall not be less than 250mm.

8. The construction method according to claim 6, characterized in that, Between step S4 and step S5, there is also a step of pouring a second fine stone concrete leveling layer or a fine stone concrete protective layer.

9. The construction method according to claim 6, characterized in that, In step S6, a special mold for roof cement mortar is used to stretch and apply the waterproof mortar outer molding at the pipe root, and the surface of the waterproof mortar outer molding is smooth and the slope is straight.

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