Joint structure for waterproof method of steel column out of roof

Abstract

The invention relates to the technical field of constructional engineering, and discloses a node structure of a roof steel column waterproof method, which comprises a steel structure column, and a steel column waterproof coating, a thick concrete reverse ridge, a waterproof roll and a protective layer which are sequentially arranged from inside to outside, the thick concrete reverse ridge is arranged around the steel structure column, the waterproof coiled material covers the junction of the thick concrete reverse ridge and the roof panel, the protective layer is arranged on the outer side of the waterproof coiled material, an expansion water stop strip is arranged on the vertical junction face of the steel structure column and the parapet wall, and the outer side of the expansion water stop strip is sealed through waterproof paint. An R50 fillet is arranged at the junction of the thick concrete reverse ridge and the roof panel, and the waterproof roll is laid on the R50 fillet and the surfaces of the adjacent roof panel and the thick concrete reverse ridge. Through cooperation of multiple layers of waterproof structures, the deformation resistance and sealing performance of the waterproof structure are effectively improved, the corrosion risk of the steel column is effectively reduced, and the later maintenance cost of a building can be reduced.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a joint structure for waterproofing a steel column protruding from the roof. Background Technology

[0002] The joint construction of waterproofing for steel columns protruding from the roof refers to the waterproofing structural system designed for the area where the steel structure column protruding upwards from the roof meets the roof surface in a building project. Due to differences in materials between the steel structure and the concrete roof, as well as structural deformation, this joint is prone to becoming a weak point for rainwater leakage, and its waterproofing performance directly affects the safety and durability of the building's interior space. Currently, the existing technology for waterproofing steel columns protruding from the roof typically employs conventional waterproofing methods such as applying waterproof coatings and laying waterproof membranes, along with structural measures such as installing concrete retaining walls. These methods form a waterproof layer at the junction of the steel column and the roof, which to some extent blocks rainwater penetration. At the same time, the concrete retaining walls enhance the waterproofing capacity of the joint, achieving basic waterproofing effects in some building projects. However, due to the differences in chemical properties between steel, concrete, and waterproofing materials, and the fact that steel structures are susceptible to dynamic deflection and deformation caused by factors such as temperature differences and loads during use, existing waterproofing structures cannot maintain a sealing effect for a long time. On the one hand, the waterproofing layer is prone to cracking and peeling under the deformation of the steel structure; on the other hand, traditional joint treatment methods do not provide sufficient protection for detailed structures (such as inside and outside corners and joints), allowing rainwater to still seep in through tiny gaps. Long-term leakage will not only corrode steel columns and reduce structural safety, but also easily cause damage to interior decoration, equipment failure, and other problems, increasing the later maintenance costs and safety hazards of the building. Summary of the Invention

[0003] The purpose of this invention is to provide a joint structure for waterproofing steel columns protruding from the roof, which solves the problems of waterproofing layer failure and joint leakage caused by the difference in properties between steel and building materials and deformation of the steel structure.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A joint structure for waterproofing a steel column protruding from the roof includes a steel column and, from the inside out, the following components are arranged sequentially: a steel column waterproof coating, a thick concrete retaining wall, a waterproof membrane, and a protective layer; the thick concrete retaining wall surrounds the steel column, the waterproof membrane covers the junction of the thick concrete retaining wall and the roof panel, and the protective layer is located on the outside of the waterproof membrane.

[0005] Preferably, an expansion waterstop strip is provided at the vertical interface between the steel structure column and the parapet wall, and the outer side of the expansion waterstop strip is sealed with waterproof coating.

[0006] Preferably, an R50 rounded corner is provided at the junction of the thick concrete curb and the roof panel, and the waterproof membrane is laid on the R50 rounded corner and the surface of the adjacent roof panel and the thick concrete curb.

[0007] Preferably, a sealant is provided at the junction of the roof panel protective layer and the thick concrete inverted retaining wall waterproof membrane.

[0008] Preferably, after the waterproof membrane at the top of the thick concrete sill is sealed with sealant, an aluminum alloy cover plate is installed, and the aluminum alloy cover plate is fixed by iron hoops.

[0009] Preferably, the width of the thick concrete curb is 150mm to 200mm, and the height is 300mm above the finished roof surface.

[0010] Preferably, the construction height of the waterproof coating on the steel columns is 300mm above the finished roof surface, and the waterproof coating on the vertical steel columns and the waterproof coating on the flat concrete roof slab are applied in one go.

[0011] Preferably, the protective layer is an M20 cement mortar protective layer, which is applied to the thick concrete inverted wall facade.

[0012] Preferably, the waterproof membrane and the roof panel are installed in one step, and the waterproof membrane wraps around the thick concrete curb.

[0013] A construction method for the joint structure of a waterproofing process for steel columns protruding from the roof includes the following steps: Step 1: Steel column base treatment: Treat the base of the steel structure column to ensure thorough rust removal; Step 2, First coat of waterproof coating application: After the base layer treatment is completed, apply the waterproof coating to the steel columns. Apply the vertical waterproof coating to the steel columns and the waterproof coating to the flat concrete roof slab at the same time. The application height is 300mm above the finished roof surface. Step 3: Construction of the thick concrete curb: After the waterproof coating on the steel columns is applied and cured, pour a 150mm to 200mm thick concrete curb around the steel columns, with a pouring height of 300mm above the finished roof surface. Step 4: Construction of vertical expansion waterstop strips: After the thick concrete inverted wall is constructed, expansion waterstop strips are installed at the vertical interface between the steel structure column and the parapet wall. After installation, waterproof coating is used to seal the interface. Step 5: Waterproof membrane construction: After the above steps are completed, use cement mortar to make an R50 rounded corner at the junction of the thick concrete curb and the roof slab, and then carry out the waterproof membrane construction. The waterproof membrane is constructed at the same time as the roof slab waterproof membrane. The waterproof membrane should wrap around the thick concrete curb. Step Six: Protective Layer Construction: After the above steps are completed, the protective layer is constructed. The junction between the roof panel protective layer and the thick concrete inverted sill waterproof membrane is sealed with sealant. After the waterproof membrane on the top of the thick concrete inverted sill is sealed with sealant, an aluminum alloy cover plate is placed on top and fixed with iron hoops.

[0014] In summary, the present invention has at least one of the following beneficial technical effects: 1. This invention involves simultaneously applying waterproof coatings to steel columns and concrete roof panels, extending 300mm above the finished roof surface to form a continuous sealing layer. This sealing layer fills the pores on the surface of the steel columns and, relying on the flexibility of the coating, adapts to the slight deformations of the steel structure caused by temperature differences and loads. This reduces the risk of cracking in the waterproof layer to a certain extent, effectively reduces water penetration along the junction of the steel columns and the roof, and helps improve the sealing performance and deformation resistance of the waterproof system. 2. This invention involves casting a thick concrete curb with a width of 150mm to 200mm and a height of 300mm around the steel structure column to seal the area where the steel column meets the roof concrete slab. The thick concrete curb acts as a physical barrier to block rainwater, provides a stable foundation for the laying of waterproof membrane, and protects the waterproof coating on the steel column inside, reducing the impact of external factors and thus enhancing the overall stability and durability of the waterproof structure. 3. By setting an R50 rounded corner at the junction of the thick concrete curb and the roof panel, this invention can alleviate the stress concentration caused by right-angle bending on the waterproof membrane and reduce the possibility of membrane damage. The waterproof membrane and the roof panel are constructed in one step and wrapped around the thick concrete curb to form a continuous second line of defense against water leakage, which can reduce the leakage of rainwater from the junction of the curb and the roof panel and further improve the reliability of the waterproof effect. 4. This invention achieves double protection for the waterproof membrane by setting a sealant and an aluminum alloy cover plate on the top of the thick concrete retaining wall and covering the vertical surface of the thick concrete retaining wall with a cement mortar protective layer. The sealant fills the gaps to enhance the sealing effect, the aluminum alloy cover plate can prevent the membrane from being exposed and aging, and the cement mortar protective layer can resist external environmental erosion and external impact, thereby extending the service life of the waterproof system to a certain extent and reducing the later maintenance cost. Attached Figure Description

[0015] Figure 1 This is a detailed plan view of the joint structure of the roof steel column waterproofing method of the present invention; Figure 2 This is an elevation section view of the joint structure of the roof steel column waterproofing method of the present invention. Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 This is an exploded view of the structure of the present invention; Figure 5This is a cross-sectional view of the waterproof joint between the steel column and the parapet wall in the vertical direction according to the present invention. Figure 6 This is an enlarged view of the waterproof structure at the junction of the thick concrete retaining wall and the roof panel of the present invention; Figure 7 This is a flowchart of the construction steps for the waterproof joint of the present invention.

[0016] The components include: 1. Waterproof coating for steel columns; 2. Thick concrete curb; 3. Waterproof membrane; 4. Expansion stop strip; 5. R50 rounded corners; 6. Sealant; 7. Cement mortar protective layer; 8. Aluminum alloy cover plate; 9. Iron hoops. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0018] Please see the appendix Figure 1 - Appendix Figure 7 This invention provides a joint structure for waterproofing a steel column protruding from the roof, including a steel column and, from the inside out, the following components are arranged sequentially: a waterproof coating 1, a thick concrete retaining wall 2, a waterproof membrane 3, and a protective layer. The thick concrete retaining wall 2 surrounds the steel column, the waterproof membrane 3 covers the junction of the thick concrete retaining wall 2 and the roof panel, and the protective layer is placed on the outside of the waterproof membrane 3. An expansion waterstop strip 4 is provided at the vertical junction of the steel column and the parapet wall, and the outside of the expansion waterstop strip 4 is sealed with waterproof coating. An R50 rounded corner 5 is provided at the junction of the thick concrete retaining wall 2 and the roof panel. The waterproof membrane 3 is laid on the R50 rounded corner 5 and the surfaces of the adjacent roof panel and the thick concrete retaining wall 2. The roof panel protective layer and the thick concrete retaining wall 2 are waterproofed together. Sealant 6 is applied at the junction of the waterproof membrane. After the waterproof membrane on the top of the thick concrete curb 2 is sealed with sealant 6, an aluminum alloy cover plate 8 is installed. The aluminum alloy cover plate 8 is fixed by iron hoops 9. The width of the thick concrete curb 2 is 150mm to 200mm, and the height is 300mm above the finished roof surface. The construction height of the steel column waterproof coating 1 is 300mm above the finished roof surface. The vertical steel column waterproof coating 1 and the flat concrete roof panel waterproof coating are applied in one go. The protective layer is an M20 cement mortar protective layer 7. The M20 cement mortar protective layer 7 is set on the vertical surface of the thick concrete curb 2. The waterproof membrane 3 is applied to the roof panel in one go, and the waterproof membrane 3 wraps around the thick concrete curb 2.

[0019] Specifically, by simultaneously applying the waterproof coating 1 to the steel column and the waterproof coating to the flat concrete roof slab, with the application height extending 300mm above the finished roof surface, the first sealing and waterproof layer is formed. This waterproof layer not only effectively fills the pores on the surface of the steel column, but also, due to its good flexibility, can adapt to the slight deformation of the steel column caused by temperature changes and loads during use, greatly reducing the risk of cracking of the waterproof layer.

[0020] Regarding the installation of the thick concrete retaining wall 2, the width of the thick concrete retaining wall poured around the steel structure column is controlled between 150mm and 200mm, while the height reaches 300mm. This thick concrete retaining wall effectively seals the boundary area between the steel column and the roof. The thick concrete retaining wall not only forms an effective barrier to resist the penetration of rainwater, but also provides a stable and flat foundation for the subsequent construction of the waterproof membrane 3, which helps to ensure the durability and stability of the waterproof layer.

[0021] At the junction of the thick concrete retaining wall 2 and the roof slab, a radius of 50 (R50) corner fillet is specially designed. This design effectively eliminates stress concentration on the waterproof membrane at right angles, thereby further reducing the risk of damage to the waterproof membrane during use. By ensuring that the construction of the waterproof membrane 3 and the roof slab is completed in one go, and by wrapping the membrane inside the thick concrete retaining wall, a continuous second line of defense for waterproofing is formed, enhancing the reliability of the overall waterproof structure.

[0022] For the vertical junction between the steel structure column and the parapet wall, an expansion waterstop strip 4 is installed in the design, and a waterproof coating is used to seal it on the outside. This measure enhances the waterproofing ability of the vertical joint, ensures that water cannot penetrate at this point, and further improves the waterproofing effect of the structure.

[0023] Finally, a cement mortar protective layer 7 was used during construction. This protective layer covered the facade of the thick concrete retaining wall 2, maximizing the protection of the internal waterproof membrane 3 from external environmental damage. At the same time, sealant 6 was applied to fill the gaps at each joint to ensure that there were no dead corners at all joints, further enhancing the sealing effect. For final protection, an aluminum alloy cover plate 8 was fixed to the top of the thick concrete retaining wall 2 and secured with iron hoops 9, thus achieving multiple protections for the waterproof membrane 3.

[0024] The combined effect of the above multiple waterproofing measures and sealing structures effectively enhances the deformation resistance and overall sealing performance of the waterproof structure, which not only reduces the risk of steel column corrosion, but also helps to reduce the cost of later building maintenance, providing long-term safety assurance for the building.

[0025] Please see the appendix Figure 1 - Appendix Figure 7 This invention provides a construction method for the joint structure of a waterproofing process for steel columns protruding from the roof, comprising the following steps: Step 1: Steel column base treatment: Treat the base of the steel structure column to ensure thorough rust removal; Specifically, professional tools are used to mechanically grind the surface of the steel column to ensure that all oil, rust and dust are removed, so that the surface treatment achieves a metallic luster. After the treatment is completed, the steel column is thoroughly cleaned with clean water and wiped with a dry cloth to ensure that there is no moisture residue on the surface of the steel column, so as to provide a good foundation for subsequent construction.

[0026] Step 2, First coat of waterproof coating application: After the base layer treatment is completed, apply the waterproof coating 1 for the steel columns. Apply the vertical waterproof coating for the steel columns and the waterproof coating for the flat concrete roof slab in one application. The application height is 300mm above the finished roof surface. Specifically, after the base layer is treated, the waterproof coating 1 for steel columns is sprayed evenly to ensure uniform coverage and no missed areas. At the same time, a brush or roller is used to apply the waterproof coating for the flat concrete roof panel and the waterproof coating 1 for steel columns simultaneously, so that the two are tightly bonded at the junction. The construction height reaches 300mm above the finished roof surface to form an effective waterproof barrier and ensure that the thickness and performance of the coating meet the design requirements.

[0027] Step 3, Construction of Thick Concrete Reverse Bench 2: After the waterproof coating 1 for the steel column is applied and cured, pour a 150mm to 200mm thick concrete reverse bench 2 around the steel column, with a pouring height of 300mm above the finished roof surface. Specifically, after confirming that the waterproof coating has completely cured, concrete pouring work begins around the steel columns. Templates must be set up in advance to ensure the pouring width is between 150mm and 200mm, and the height extends 300mm above the finished roof surface. The concrete should be poured evenly and vibrated to eliminate air bubbles and voids, ensuring the compactness and stability of the retaining wall 2. Subsequent work can proceed after the concrete reaches its design strength.

[0028] Step 4: Construction of vertical expansion waterstop strip 4. If a parapet wall is encountered: After the construction of the thick concrete backsplash 2 is completed, an expansion waterstop strip 4 is installed at the vertical interface between the steel structure column and the parapet wall. After installation, it is sealed with waterproof coating. Specifically, after the thick concrete retaining wall 2 is completed, carefully inspect the joints between the steel structure column and the parapet wall. Based on the actual condition of the joints, apply the expansion sealant 4 according to the design requirements to ensure it can effectively resist water penetration. Then, evenly apply waterproof coating to the outside of the expansion sealant 4 to ensure that all joints and transitions are well sealed and improve the waterproofing effect.

[0029] Step 5, Waterproofing membrane construction: After the above steps are completed, use cement mortar to make an R50 rounded corner 5 at the junction of the thick concrete curb 2 and the roof panel. Then, the waterproofing membrane 3 is constructed. The waterproofing membrane of the roof panel is constructed at the same time. The waterproofing membrane should wrap around the thick concrete curb 2. Specifically, an R50 rounded corner 5 is constructed between the thick concrete curb 2 and the roof slab using cement mortar to ensure a smooth construction surface without sharp corners, thereby reducing the possibility of damage to the waterproof membrane 3 due to stress concentration. When applying the waterproof membrane 3, it is ensured that it is laid simultaneously with the waterproof membrane of the roof slab, and the membrane must completely wrap the thick concrete curb 2 to form a seamless connection, ensuring its waterproof performance is durable and effective.

[0030] Step 6, Protective Layer Construction: After the above steps are completed, the protective layer is constructed. The junction between the roof panel protective layer and the thick concrete retaining wall 2 and the waterproof membrane 3 is sealed with sealant 6. After the top of the thick concrete retaining wall 2 and the waterproof membrane 3 is sealed with sealant 6, an aluminum alloy cover plate 8 is placed on top and fixed with iron hoops 9.

[0031] Specifically, after all the waterproofing layers are completed, the protective layer is constructed first, with a focus on the gaps where the protective layer meets the waterproof membrane 3. The gaps are filled and sealed with sealant 6 to prevent any potential water seepage. For the top of the thick concrete retaining wall 2, sealant 6 is applied evenly first, and then the aluminum alloy cover plate 8 is installed and secured with iron hoops 9 to ensure that the cover plate and the waterproof membrane 3 form an integrated protective structure, thereby increasing the waterproofing effect and extending the overall service life.

[0032] Working principle: During construction, the waterproof coating 1 for steel columns is applied tightly to the surface of the steel structure columns and is applied simultaneously with the waterproof coating for the flat concrete roof slab. It extends upwards to 300mm above the finished surface of the roof to form the first sealing layer, fills the pores on the surface of the steel column and adapts to its deformation, and blocks the seepage path of water along the junction of the steel column and the roof. Based on this, a thick concrete retaining wall 2 is poured around the steel structure column. Its width of 150mm to 200mm and height of 300mm seals the interface area between the steel column and the roof concrete slab. This serves as a physical barrier to prevent rainwater intrusion and provides a stable base for the subsequent laying of the waterproof membrane 3, while also protecting the waterproof coating 1 attached to the steel column inside. If the steel structure column intersects vertically with the parapet wall, after the thick concrete retaining wall 2 is constructed, an expansion waterstop strip 4 is installed at the interface and sealed with waterproof coating. Its water-expanding properties allow it to fill the gaps and enhance the waterproofing capacity of the vertical joint. Subsequently, an R50 rounded corner 5 is set at the junction of the thick concrete retaining wall 2 and the roof panel to eliminate the stress effect of the right angle bend on the waterproof membrane 3; the waterproof membrane 3 is laid on the R50 rounded corner 5, the adjacent roof panel and the surface of the thick concrete retaining wall 2, and together with the roof panel waterproof membrane 3, it is constructed in one go and wraps the thick concrete retaining wall 2 to form a continuous second waterproof barrier to further resist rainwater intrusion. Finally, a cement mortar protective layer 7 with a strength grade of M20 covers the facade of the thick concrete retaining wall 2 to resist damage to the waterproof membrane 3 from the external environment and improve the structural durability; sealant 6 fills the junction between the roof panel protective layer and the waterproof membrane of the thick concrete retaining wall 2, as well as the top joint of the thick concrete retaining wall 2, to strengthen the seal; aluminum alloy cover plate 8, fixed by iron hoops 9, covers the top of the thick concrete retaining wall 2 to prevent the waterproof membrane 3 from being exposed and aging.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A joint structure for waterproofing a steel column protruding from the roof, characterized in that, It includes steel structure columns, and from the inside out, the following are arranged in sequence: steel column waterproof coating (1), thick concrete backsplash (2), waterproof membrane (3) and protective layer; the thick concrete backsplash (2) is arranged around the steel structure columns, the waterproof membrane (3) covers the junction of the thick concrete backsplash (2) and the roof panel, and the protective layer is arranged on the outside of the waterproof membrane (3).

2. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, An expansion waterstop strip (4) is provided at the vertical interface between the steel structure column and the parapet wall, and the outer side of the expansion waterstop strip (4) is sealed with waterproof coating.

3. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, The thick concrete curb (2) is provided with an R50 rounded corner (5) at the junction with the roof panel, and the waterproof membrane (3) is laid on the R50 rounded corner (5) and the surface of the adjacent roof panel and the thick concrete curb (2).

4. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, A sealant (6) is provided at the junction of the roof panel protective layer and the thick concrete inverted wall (2) waterproof membrane.

5. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, After the waterproof membrane at the top of the thick concrete inverted wall (2) is sealed with sealant (6), an aluminum alloy cover plate (8) is installed, which is fixed by iron hoops (9).

6. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, The width of the thick concrete inverted curb (2) is 150mm to 200mm, and the height is 300mm above the finished roof surface.

7. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, The construction height of the steel column waterproof coating (1) is 300mm above the finished surface of the roof, and the vertical steel column waterproof coating (1) and the flat concrete roof panel waterproof coating are completed in one operation.

8. The joint structure of the waterproofing method for steel columns protruding from the roof according to claim 1, characterized in that, The protective layer is an M20 cement mortar protective layer (7), which is installed on the vertical surface of the thick concrete inverted wall (2).

9. The joint structure of the waterproofing method for steel columns protruding from the roof according to any one of claims 1-8, characterized in that, The waterproof membrane (3) is applied to the roof panel in one operation, and the waterproof membrane (3) wraps around the thick concrete curb (2).

10. A construction method for a joint structure of a waterproofing method for steel columns protruding from the roof, as described in claim 1, characterized in that... Includes the following steps: Step 1: Steel column base treatment: Treat the base of the steel structure column to ensure thorough rust removal; Step 2, First layer of waterproof coating construction: After the base layer is treated, the waterproof coating for steel columns (1) is applied. The vertical waterproof coating for steel columns and the waterproof coating for the flat concrete roof slab are applied at the same time. The construction height is 300mm above the finished surface of the roof. Step 3, Construction of thick concrete curb (2): After the construction and curing of the steel column waterproof coating (1), pour a 150mm to 200mm thick concrete curb (2) around the steel column, with a pouring height of 300mm above the finished roof surface; Step 4, Vertical Expansion Waterstop (4) Construction If a parapet wall is encountered: After the construction of the thick concrete backsplash (2) is completed, an expansion waterstop (4) is set at the vertical interface between the steel structure column and the parapet wall. After the setting is completed, a waterproof coating is used to seal it. Step 5, Waterproof membrane construction: After the above steps are completed, use cement mortar to make an R50 rounded corner (5) at the junction of the thick concrete curb (2) and the roof panel, and then carry out the waterproof membrane (3) construction. The waterproof membrane is constructed at the same time as the roof panel waterproof membrane. The waterproof membrane should wrap the thick concrete curb (2). Step 6, Protective layer construction: After the above steps are completed, the protective layer is constructed. The junction of the roof panel protective layer and the thick concrete inverted wall (2) and waterproof membrane (3) is sealed with sealant (6). After the waterproof membrane (3) on the top of the thick concrete inverted wall (2) is sealed with sealant (6), an aluminum alloy cover plate (8) is pressed on top and fixed with iron hoops (9).

Images