Waterproof structure at intersection of steel structure and concrete roof

Abstract

This utility model discloses a waterproof structure at the junction of a steel structure and a concrete roof, comprising: a concrete wall, a steel roof, and a protective plate. Bolts are pre-embedded inside the concrete wall, and connectors are fixed to the concrete wall by the bolts. A steel beam is welded to one side of the connector. A steel roof is set on one side of the concrete wall, and the steel roof is welded to the steel beam. A protective plate is set between the concrete wall and the steel roof. A conical protective cover is fitted at the connection between the steel beam and the concrete wall, and an annular airbag is set between the conical protective cover and the protective plate. This utility model constructs a five-layer waterproof system of "pretreatment layer → main membrane layer → joint protective cover layer → airbag sealing layer → outer protective plate". Each layer has complementary functions and synergistic effects: the pretreatment layer (cement mortar leveling + interface agent) ensures that the base layer is flat and firmly bonded to the membrane; the main membrane directly blocks the penetration channel of the core junction.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing engineering technology, specifically a waterproofing structure at the junction of a steel structure and a concrete roof. Background Technology

[0002] In the field of building construction, the junction between steel structure and concrete roof is a critical and weak area for waterproofing. Due to differences in material properties, structural deformation and construction process limitations, this area has long faced the risk of water seepage. Due to the significant difference in thermal expansion coefficients between steel structures (such as steel beams and steel roofs) and concrete walls, both will undergo varying degrees of expansion and contraction under temperature changes (high temperatures in summer and low temperatures in winter). Traditional waterproofing methods often use a single waterproof membrane or sealant, but the adhesion performance of the membrane to the two substrates is difficult to match simultaneously. The sealant is prone to cracking and falling off due to structural deformation, causing the originally sealed gaps to reopen and form seepage channels. At the same time, the connection nodes between steel beams and concrete walls (including embedded bolts and welds) are high-risk areas for seepage. Traditional designs often rely solely on the sealing properties of the bolts themselves or simple anti-corrosion coatings, lacking targeted protective structures. The gaps between the bolt holes and the concrete are easily loosened by rainwater erosion. If there are defects such as weld slag or incomplete welds in the welds, they can directly become entry points for water seepage. Moreover, this area is often hidden for a long time, making it difficult to locate and repair seepage problems in a timely manner. Ultimately, this may lead to steel beam corrosion and concrete crumbling, affecting the structural safety of the building.

[0003] Therefore, we propose a waterproof structure for the junction of steel structure and concrete roof. Utility Model Content

[0004] The purpose of this utility model is to provide a waterproof structure at the junction of steel structure and concrete roof to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof structure at the junction of a steel structure and a concrete roof, comprising: a concrete wall, a steel roof, and a protective plate. Bolts are pre-embedded inside the concrete wall, and connectors are fixedly installed on the concrete wall by the bolts. A steel beam is welded to one side of the connectors. A steel roof is provided on one side of the concrete wall. The steel roof is welded to the steel beam. A protective plate is provided between the concrete wall and the steel roof. A conical protective cover is fitted at the connection between the steel beam and the concrete wall, and an annular airbag is provided between the conical protective cover and the protective plate.

[0006] Preferably, a waterproof membrane is installed at the connection between the concrete wall and the steel roof.

[0007] Preferably, the annular airbag is inflated with its most prominent orientation toward the junction of the concrete wall and the steel roof.

[0008] Preferably, the joints of the conical protective cover are coated with an elastic waterproof coating, and the conical protective cover is welded to the steel beam at the joint.

[0009] Preferably, before installing the waterproof membrane at the connection between the concrete wall and the steel roof, the surface should be leveled with cement mortar and then an interface agent should be applied.

[0010] Preferably, waterproof membrane is installed at the joints of the conical protective cover and between the conical protective cover and the protective plate.

[0011] Preferably, an inspection joint for maintenance is provided between the protective panel and the concrete wall.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Multi-layered collaborative protection significantly improves waterproof reliability.

[0014] This structure constructs a five-layer waterproofing system: a pretreatment layer, a main membrane layer, a joint protective cover layer, an airbag sealing layer, and an outer protective plate. Each layer complements and works synergistically: the pretreatment layer (cement mortar leveling + interface agent) ensures a smooth substrate and strong adhesion to the membrane; the main membrane directly blocks the seepage channels at the core joints; the conical protective cover, combined with elastic coating and the membrane, strengthens the sealing of key joints; the annular airbag provides dynamic deformation compensation; and the protective plate intercepts external water. This multi-layered protection forms a "no-dead-angle" waterproof barrier, reducing the risk of seepage by more than 90% compared to traditional single-layer waterproofing methods, and is adaptable to complex climatic environments such as rainy, hot, and cold weather.

[0015] Dynamic sealing design to adapt to structural deformation requirements

[0016] To address the difference in thermal expansion and contraction between steel structures and concrete, this structure innovatively incorporates an annular airbag. When inflated, the airbag tightly adheres to the protective panel and the conical protective cover, and possesses elastic expansion and contraction capabilities. When the structure undergoes minor deformation due to temperature changes or external loads, the airbag expands and contracts synchronously, maintaining a sealed state at all times. This avoids the cracking and warping problems that traditional waterproof membranes experience due to structural deformation, significantly improving the durability of the waterproof structure.

[0017] Strengthening key nodes to ensure structural safety

[0018] The connection between the steel beams and the concrete walls employs a triple-protection design: a conical protective cover welded and fixed, an elastic waterproof coating sealed, and a waterproof membrane covering. The protective cover is welded integrally to the steel beam, preventing water seepage at the connection joint; the elastic coating adapts to deformation, preventing cracks; and the membrane further seals potential gaps. This design not only blocks water erosion of bolts and welds, preventing steel beam corrosion and concrete efflorescence, but also enhances the structural stability of the joint and extends the overall service life of the building.

[0019] Improved ease of construction and reduced project costs

[0020] The design of each component of this structure takes into account the ease of construction: the pretreatment process (leveling, applying interface agent) is standardized, which facilitates on-site operation; components such as waterproof membrane, conical protective cover, and ring airbag can all be prefabricated in the factory, requiring only simple processes such as welding, laying, and inflation on-site, reducing on-site operation time; at the same time, the multi-layer protection design reduces the requirements for the construction accuracy of a single process, reduces the probability of rework, and indirectly reduces project costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the protective plate and annular airbag structure of this utility model.

[0024] In the diagram: 1. Concrete wall; 2. Bolt; 3. Connector; 4. Steel beam; 5. Steel roof; 6. Protective plate; 7. Conical protective cover; 8. Annular airbag; 9. Inspection seam. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-3 As shown, a waterproof structure at the junction of a steel structure and a concrete roof includes a concrete wall 1, a steel roof 5, and a protective plate 6. Bolts 2 are pre-embedded inside the concrete wall 1. Connectors 3 are fixedly installed on the concrete wall 1 by the bolts 2. A steel beam 4 is welded to one side of the connector 3. The steel roof 5 is provided on one side of the concrete wall 1. The steel roof 5 is welded to the steel beam 4. A protective plate 6 is provided between the concrete wall 1 and the steel roof 5. A conical protective cover 7 is fitted at the connection between the steel beam 4 and the concrete wall 1. An annular airbag 8 is provided between the conical protective cover 7 and the protective plate 6.

[0027] A waterproof membrane is installed at the connection between the concrete wall 1 and the steel roof 5.

[0028] The annular airbag 8 is inflated with its most prominent orientation toward the connection between the concrete wall 1 and the steel roof 5.

[0029] The joints of the conical protective cover 7 are coated with an elastic waterproof coating, and the conical protective cover 7 is welded to the steel beam 4 at the joint.

[0030] Before installing the waterproof membrane, the connection between the concrete wall 1 and the steel roof 5 is leveled with cement mortar, and then an interface agent is applied.

[0031] Waterproof membrane is installed at the joints of the conical protective cover 7 and between the conical protective cover 7 and the protective plate 6.

[0032] An inspection joint 9 for maintenance is provided between the protective plate 6 and the concrete wall 1.

[0033] Working principle:

[0034] I. Waterproofing Pre-treatment of Basic Connections: Establishing a Solid Waterproof Foundation

[0035] In the initial stage of structural installation, the connection between the concrete wall 1 and the steel roof 5 is pre-treated to provide a stable foundation for subsequent waterproofing. Cement mortar is first used to level the connection surface to eliminate unevenness between the wall and the roof, avoiding poor adhesion of the waterproof membrane due to surface unevenness. After the leveling layer dries, an interface agent is applied. The interface agent can enhance the bonding strength between the concrete base and the subsequent waterproof membrane, preventing the membrane from lifting or falling off due to insufficient adhesion, thus reducing the risk of water seepage from the base layer gaps from the source.

[0036] II. Fixing and Sealing of the Main Structure: Blocking Seepage Channels in the Foundation

[0037] The bolts 2 pre-embedded inside the concrete wall 1 not only serve to fix the connector 3, but also reduce the possibility of the bolt holes becoming seepage channels through the tight engagement between the bolts and the wall. After the connector 3 is welded to the steel beam 4 and the steel roof 5 is welded to the steel beam 4, a rigid connection system is formed. At the same time, the weld seams are sealed to prevent water from seeping into the structure through the weld gaps. In addition, a waterproof membrane is directly laid at the connection between the concrete wall 1 and the steel roof 5. The membrane covers the core area of ​​the connection seam, and the waterproof properties of the membrane directly block the main channel for water to seep in along the junction of the wall and the roof.

[0038] III. Dual Protection of the Conical Protective Shield: Enhanced Waterproofing of Key Nodes

[0039] The connection between steel beam 4 and concrete wall 1 is a weak point in terms of waterproofing, with potential seepage channels such as bolt holes and weld seams. The conical protective cover 7 strengthens the waterproofing of this joint in two ways. First, the conical protective cover 7 is welded to steel beam 4 as a single unit; the tightness of the weld seam prevents water from seeping in through the connection between the cover and the steel beam. Second, an elastic waterproof coating is applied to the connection seam of the cover. This elastic coating can adapt to minor deformations caused by temperature changes and loads, preventing cracks from forming. Simultaneously, the coating itself has waterproofing properties, forming the first layer of protection. Furthermore, waterproof membrane is installed at the connection seam of the conical protective cover 7 and between the cover and the protective plate 6. The membrane and the elastic waterproof coating form a double layer of protection, completely sealing the gaps between the cover itself and surrounding components, preventing water from entering the cover and corroding the connection structure between the steel beam and the wall.

[0040] IV. Dynamic sealing of the annular airbag: flexible protection that adapts to deformation

[0041] An annular airbag 8 is positioned between the conical protective cover 7 and the protective plate 6. After inflation, the most protruding part of the airbag faces the connection between the concrete wall 1 and the steel roof 5. This design allows it to specifically seal this core water-seeping area. When the structure undergoes slight deformation due to temperature changes such as high temperatures in summer or low temperatures in winter, or external loads such as snow accumulation on the roof or wind, the annular airbag can compensate through its own elastic expansion and contraction, always maintaining a tight fit against the surfaces of the protective plate and the protective cover, preventing the gaps from widening due to structural deformation. At the same time, the inflated airbag forms a high-pressure sealing layer, so even if a small amount of water seeps into this area, it will be blocked by the airbag and cannot continue to penetrate inward, achieving the dual function of "flexible sealing + deformation adaptation".

[0042] V. Physical barrier of the protective panel: Constructing an outer waterproof barrier

[0043] The protective panel 6 is installed between the concrete wall 1 and the steel roof 5, serving as an outer physical barrier for the waterproofing system. It directly prevents external rainwater and snowmelt from contacting the internal core connecting structure. The protective panel itself has a certain degree of waterproofing performance, which can initially intercept most of the external water. At the same time, the cooperation between the protective panel and the surrounding structure, such as the connection with the annular airbag and the waterproof membrane, forms a continuous protective surface, preventing water from seeping in from the edges of the protective panel or from gaps with other components, further reducing the pressure on the internal waterproofing system.

[0044] VI. Inspection and maintenance of inspection seams: Maintaining long-term waterproofing effectiveness

[0045] An inspection joint 9 is provided between the protective panel 6 and the concrete wall 1. This joint is not a weak point in the waterproofing, but rather a maintenance access point designed for long-term upkeep. During daily use, staff can periodically inspect the integrity of internal components such as the waterproof membrane, the annular airbag, and the conical protective cover through the inspection joint. If problems such as damaged membrane, leaking airbags, or cracked coating are found, they can be repaired or replaced in a timely manner to prevent damage to the entire waterproofing system due to localized waterproofing failure, ensuring the long-term stable functioning of the waterproofing structure.

[0046] In summary, the entire waterproof structure achieves comprehensive and long-lasting waterproofing at the junction of the steel structure and the concrete roof through a multi-layered collaborative mechanism of "pre-treatment leveling → main body roll protection → key node protective cover + coating + roll protection → deformation area airbag sealing → outer protective plate barrier → inspection joint maintenance". This effectively solves the problem of water seepage caused by structural deformation and gaps in this area.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof structure at a joint of a steel structure and a concrete roof, characterized by, include: Concrete wall (1), bolts (2) are embedded inside the concrete wall (1), and connectors (3) are fixedly installed on the concrete wall (1) by bolts (2), and a steel beam (4) is welded to one side of the connector (3); A steel structure roof (5) is provided on one side of the concrete wall (1), and the steel structure roof (5) is welded to the steel beam (4); A protective plate (6) is installed between the concrete wall (1) and the steel roof (5). A conical protective cover (7) is fitted between the steel beam (4) and the concrete wall (1). An annular airbag (8) is installed between the conical protective cover (7) and the protective plate (6).

2. The waterproof structure of the intersection of a steel structure and a concrete roof according to claim 1, characterized in that: A waterproof membrane is installed at the connection between the concrete wall (1) and the steel roof (5).

3. The waterproof structure at the junction of a steel structure and a concrete roof according to claim 1, characterized in that: The annular airbag (8) is inflated at the junction of the concrete wall (1) and the steel roof (5).

4. The waterproof structure of the intersection of a steel structure and a concrete roof according to claim 1, characterized in that: The joint of the conical protective cover (7) is coated with an elastic waterproof coating, and the conical protective cover (7) is welded to the steel beam (4) at the joint.

5. The waterproof structure of the intersection of a steel structure and a concrete roof according to claim 1, characterized in that: Before installing waterproof membrane, the joint between the concrete wall (1) and the steel roof (5) is leveled with cement mortar and then an interface agent is applied.

6. The waterproof structure of the intersection of a steel structure and a concrete roof according to claim 1, characterized in that: Waterproof membrane is installed at the joint of the conical protective cover (7) and between the conical protective cover (7) and the protective plate (6).

7. A waterproof structure at the junction of a steel structure and a concrete roof according to claim 1, characterized in that: An inspection joint (9) for maintenance is provided between the protective panel (6) and the concrete wall (1).

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