Roof structure of heavy-load travelling crane

Abstract

The utility model relates to a roof structure of a heavy-load traveling crane, and belongs to the technical field of civil engineering structure construction. Comprising a surface layer, an isolation layer, a waterproof layer, a foam concrete heat preservation layer and a reinforced concrete roof structure layer which are sequentially arranged from top to bottom. The surface layer comprises a sealing layer and a steel fiber concrete layer, and the sealing layer is a high-wear-resistance polyurethane antiskid surface layer; the foam concrete heat preservation layer can improve the heat preservation and waterproofness of the roof structure; the waterproof layer can be two layers of SBS modified asphalt waterproof coiled materials, and can also be an SBS modified asphalt waterproof coiled material waterproof layer and a non-cured rubber asphalt waterproof coating layer. The steel fiber reinforced concrete layer is arranged as the surface layer, so that the problem that the surface layer of the traveling crane roof structure is insufficient in rigidity is solved, the water seepage risk is reduced through combination of the high-abrasion-resistance polyurethane anti-skid surface layer and the steel fiber reinforced concrete layer, slope making is directly carried out on the surface of the reinforced concrete roof structure layer to replace a slope making layer, roof slope making materials are reduced, and the construction cost is reduced. And the manufacturing cost of the roof structure is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil construction structure construction, and relates to a heavy-loaded vehicle roof structure. Background Art

[0002] With the rapid development of the modern logistics industry, multi-story, high-standard warehouses have become critical facilities for improving storage efficiency and logistics speed. Especially in cold and alpine regions, these warehouses must not only withstand harsh climatic conditions but also meet the growing demand for logistics and transportation. In recent years, with the rise of e-commerce and cold chain logistics, it has become increasingly common for multi-story warehouse roofs in these regions to support the movement and parking of heavy-loaded commercial trucks (with axle loads ranging from 10t to 16t). This change places higher demands on the structural performance of warehouse roofs, particularly in terms of reliability, durability, and cost-effectiveness.

[0003] Traditionally, the design of driveway roofs mainly refers to standard atlases such as "12J201 Flat Roof Construction" and "14J936 Expansion Joint Construction", which provide the basic framework and guiding ideology for roof construction. However, in actual applications, especially in cold environments where heavy vehicles need to be carried, traditional practices have many limitations. Specifically, in order to enhance the thermal insulation performance of the roof, 50 mm or even thicker extruded polystyrene boards are usually used as the insulation layer. Although this material performs well in terms of thermal insulation, its relatively flexible properties significantly reduce the rigidity of the roof's driveway surface, making the roof prone to deformation when subjected to heavy loads, which in turn affects the structural safety and service life.

[0004] Furthermore, the use of extruded polystyrene (EXPS) not only increases the overall cost of the roof, but also increases the difficulty and cost of construction due to the complexity of the construction process. More seriously, the junction between the flexible insulation layer and the rigid structural layer of the EXPS is a potential leak risk point, especially in cold and high-altitude areas where temperature fluctuations are large and the material expands and contracts significantly, further exacerbating the leak problem.

[0005] With the increasing popularity and development of multi-story, high-standard logistics warehouses in cold and arid regions, existing roofing technologies for vehicles are no longer able to meet the requirements of heavy loads and high-altitude environments. Therefore, developing a roof structure that is both rigid enough to support heavy loads and provides good thermal insulation while being economical and reasonable has become a pressing technical challenge. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide a heavy-loaded roof structure for a vehicle, which solves the defects of insufficient rigidity of the surface layer of the roof structure for a vehicle, easy waterproof failure and high cost, so as to meet the requirements of use in heavy-load and high-cold environments.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0008] A heavy-duty vehicle roof structure comprises a surface layer, an isolation layer, a double-layer waterproof layer, a cement mortar leveling layer, a foam concrete insulation layer, and a roof structure layer, which are sequentially arranged from top to bottom. The surface layer comprises a sealing layer and a steel fiber concrete layer, which are sequentially arranged from top to bottom. The sealing layer is a highly wear-resistant polyurethane anti-slip surface layer. The roof structure layer is arranged to have a sloped surface on the side closest to the foam concrete insulation layer.

[0009] The highly wear-resistant polyurethane anti-skid surface layer is combined with the steel fiber concrete layer to reduce the risk of water seepage; the foam concrete insulation layer improves the thermal insulation and waterproof properties of the roof structure.

[0010] Optionally, the double-layer waterproof layer includes two layers of SBS modified asphalt waterproof membrane.

[0011] Optionally, the double waterproof layer includes an SBS modified asphalt waterproof membrane waterproof layer and a non-curing rubber asphalt waterproof coating layer.

[0012] Optionally, the thickness of the waterproof layer of the SBS modified asphalt waterproof membrane is 3 to 5 mm.

[0013] Optionally, the thickness of the non-curing rubber asphalt waterproof coating layer is 1 to 3 mm.

[0014] Optionally, the steel fiber concrete layer has a thickness of 158 to 162 mm.

[0015] Optionally, the isolation layer is a 1 mm thick felt layer.

[0016] Optionally, the leveling layer is a cement mortar leveling layer with a thickness of 19 to 21 mm.

[0017] Optionally, the roof structure layer is a reinforced concrete roof structure layer.

[0018] The beneficial effects of the present invention are:

[0019] According to actual use conditions, the utility model reasonably selects foam concrete instead of extruded polystyrene board as the thermal insulation material, cleverly sets the construction method and reasonably arranges the construction process, so that the roof structure of the utility model has good waterproofness and anti-freeze heave in high-altitude cold areas, improves the rigidity of the vehicle surface layer, and reduces construction costs. It is safe and reliable, easy to construct and maintain, and cost-effective.

[0020] The use of foamed concrete as the insulation layer is lightweight, high-strength, and offers excellent compressive resistance, effectively preventing fatigue deformation caused by heavy-duty vehicles. Its excellent thermal insulation, waterproofing, and environmental performance enhance the roof's overall performance. The application of a highly wear-resistant polyurethane anti-slip surface layer significantly enhances the surface layer's wear resistance and anti-slip properties, reducing damage to the surface layer from heavy-duty vehicles, minimizing the risk of rainwater seepage into the base layer, and improving the safety and reliability of heavy-duty vehicle operation. The use of steel fiber reinforced concrete, with its excellent freeze-thaw, crack, and impact resistance, effectively mitigates damage to the concrete caused by thermal expansion and contraction, as well as repeated heavy-duty vehicle traffic, further reducing the risk of water seepage. Furthermore, the double-layer waterproofing design, combining waterproof coating and waterproof membrane, is both economical and practical, enhancing the integrity and tightness of the waterproofing. The use of felt as the isolation layer is not only economical and easy to construct, but also effectively minimizes damage to the waterproofing layer. Finally, by directly utilizing the roof structural layer for slope leveling, roof leveling materials are conserved, reducing costs.

[0021] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a schematic cross-sectional view of the roof structure of the present utility model.

[0024] Reference numerals:

[0025] 1-surface layer, 11-sealing layer, 12-steel fiber concrete layer, 2-isolation layer, 3-double-layer waterproof layer, 31-SBS modified asphalt waterproof membrane waterproof layer, 32-non-curing rubber asphalt waterproof coating layer, 4-leveling layer, 5-insulation layer, 6-roof structure layer. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0027] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] See also Figure 1 , which is a heavy-duty vehicle roof structure, comprising, from top to bottom, a surface layer 1, an isolation layer 2, a double-layer waterproof layer 3, a cement mortar leveling layer 4, an insulation layer 5, and a roof structure layer 6; the surface layer 1 comprises, from top to bottom, a sealing layer 11 and a steel fiber concrete layer 12, the sealing layer 11 being a highly wear-resistant polyurethane anti-slip surface layer, and the insulation layer 5 being a foam concrete insulation layer 5, which can improve the thermal insulation and waterproof properties of the roof structure;

[0030] The insulation layer 5 is made of foamed concrete. Compared with the traditional extruded polystyrene board as the insulation layer 5, foamed concrete is lightweight, has good overall performance, and has high compressive strength. It can avoid fatigue deformation caused by repeated rolling of heavy vehicles. It is especially unaffected by temperature during winter construction in cold regions. Foamed concrete contains a large number of closed small voids, which has good thermal insulation and waterproof properties. It is also environmentally friendly and does not contain harmful substances such as benzene and formaldehyde.

[0031] The highly wear-resistant polyurethane anti-skid surface layer is combined with the steel fiber concrete layer 12 to reduce the risk of water seepage.

[0032] The highly abrasion-resistant polyurethane anti-slip surface layer utilizes a highly abrasion-resistant, anti-slip coating specifically designed for parking lots, providing both sealing and anti-slip properties. Compared to traditional fine stone concrete with coarse sand grouting, this effectively reduces wear and tear on surface layer 1 caused by heavy-loaded vehicles, thereby reducing the risk of rainwater seepage into the base layer. The surface layer 1 also achieves a stronger bond with the base layer. Furthermore, the anti-slip properties of this layer increase the friction coefficient for heavy-loaded vehicles, enhancing vehicle safety and reliability.

[0033] The steel fiber concrete layer 12 adopts C30 low-shrinkage steel fiber concrete with a thickness of 158mm to 162mm. In some embodiments of the present invention, the thickness is preferably 160mm. Steel fiber concrete has excellent freeze-thaw resistance, crack resistance and impact resistance. Compared with traditional reinforced fine stone concrete, it effectively avoids the damage to concrete caused by thermal expansion and contraction and repeated operation of heavy-loaded vehicles, and the possibility of cracks, thereby reducing the risk of water seepage. Low-shrinkage steel fiber concrete is a high-performance composite material that is mixed with randomly distributed short steel fibers in ordinary concrete and uses special proportions and technical means to reduce the shrinkage rate of concrete. This material combines the high strength and high toughness of steel fiber concrete with the low shrinkage characteristics of low-shrinkage concrete, and has significant advantages. It can improve the seismic performance, bearing capacity and service life of building structures. At the same time, it can also reduce the volume and weight of components, improve construction efficiency, effectively resist the impact and erosion of external forces, and enhance the stability, safety and durability of the structure.

[0034] The double-layer waterproofing layer 3 can be constructed using two layers of SBS modified asphalt waterproofing membrane, or it can be constructed using an SBS modified asphalt waterproofing membrane layer 31 and a non-curing rubberized asphalt waterproofing coating layer 32. During actual construction, the appropriate construction method can be selected based on site conditions and project requirements. A combination of waterproofing coating and waterproofing membrane is more economical than the traditional two-layer waterproofing membrane. Furthermore, the combined waterproofing layer provides a better overall integrity and a tighter structure, reducing the risk of water seepage.

[0035] The SBS modified asphalt waterproofing membrane layer utilizes a hot-melt method, which uses a flame to melt the membrane and bond it to the roof surface. Hot-melt waterproofing membranes offer excellent tensile strength, flexibility, heat and low-temperature resistance, aging resistance, puncture resistance, and tear resistance, adapting well to the strain capacity of the roofing base. These properties make them corrosion-resistant and aging-resistant, extending their lifespan compared to other waterproofing materials in exposed environments. Hot-melt waterproofing membranes also offer permanent bonding, strong self-healing properties, and resistance to cracks, enabling them to form a complete, impermeable waterproofing layer, ensuring the continuity and integrity of the waterproofing system.

[0036] The thickness of the SBS modified asphalt waterproof membrane waterproof layer 31 is 3-5 mm. In some embodiments of the present invention, the thickness is preferably 4 mm.

[0037] The thickness of the non-curing rubber asphalt waterproof coating layer 32 is 1-3 mm. In some embodiments of the present invention, the thickness is preferably 2 mm.

[0038] The isolation layer 2 is a 1mm thick linoleum layer. Compared with the traditional cement mortar as the isolation layer 2, the material is more economical, the construction is more convenient, the hardness is lower, the elasticity is better, the damage of the isolation layer 2 to the waterproof layer is effectively reduced, and the overall bonding between the materials is better.

[0039] The thickness of the cement mortar leveling layer 4 is 19-21 mm, preferably 20 mm, and the cement mortar with a mass ratio of cement to sand of 1:3 is used.

[0040] The roof structure layer 6 is a reinforced concrete roof structure layer 6. The slope of the reinforced concrete roof structure layer 6 close to the leveling layer 4 is 2%. The utility model cancels the slope layer and directly replaces the slope layer by setting the surface of the roof structure layer 6 to have a slope, saving roof slope materials and reducing costs.

[0041] The construction steps of this utility model are:

[0042] S1, cast-in-place reinforced concrete roof structure layer 6, the thickness of the roof structure layer 6 is calculated based on the structure and load;

[0043] S2, after the roof structure layer 6 reaches 70% of the design strength and has a smooth surface without cracks or looseness, pour foam concrete on the roof structure layer 6 to form a foam concrete insulation layer 5; ensure that the insulation layer 5 is tightly bonded to the roof structure layer 6;

[0044] Methods for ensuring a tight bond between the two include cleaning and inspecting the roof structure layer 6 before pouring to ensure it is free of looseness, hollowing, sanding, or dusting, ensuring a good bond between the foamed concrete and the roof structure layer 6. Before pouring the foamed concrete, the roof structure layer 6 should be moistened to improve the bond between the foamed concrete and the roof structure layer 6 and prevent shrinkage cracks. Setting elevation control lines and pouring in layers during pouring and construction can also help improve pouring quality. Furthermore, measures to strengthen the bond, such as applying a layer of plain cement slurry or an interfacial binder on the roof structure layer 6, can enhance the bond between the foamed concrete and the roof structure layer 6.

[0045] S3, using 1:3 cement mortar to level the micropores on the surface of the foam concrete to form a leveling layer 4;

[0046] S4, laying a double waterproof layer 3, in this embodiment, a double waterproof layer 3 of "waterproof membrane + waterproof coating" is used;

[0047] The first waterproof layer is sprayed on the leveled surface with non-curing rubber asphalt waterproof coating. It is easy to apply, has excellent waterproof self-healing properties, is barrier-free in high and low temperature construction, and has good bonding performance.

[0048] The second waterproof layer uses SBS modified asphalt waterproof membrane, which must meet the waterproof requirements and ensure close bonding with the first waterproof layer.

[0049] S5, after the double waterproof layer 3 is laid, the linoleum isolation layer 2 is laid on it to connect the upper and lower layers and avoid damage to the waterproof layer caused by inconsistent thermal expansion and contraction coefficients between different materials;

[0050] S6, pouring steel fiber concrete on the isolation layer 2 to form a steel fiber concrete layer 12;

[0051] In step S6, C30 concrete is used, into which steel fibers bonded in rows are added to enhance its performance, and after pouring and initial setting, the concrete surface is compacted and smoothed to improve its flatness and aesthetics. After the strength reaches the standard, the surface is polished or sandblasted, and the surface is constructed using a large-area laser paver to achieve laser leveling. The steel fiber concrete in this embodiment is a concrete with a weight of 15 kg of steel fibers per cubic meter, a length range of 30 mm to 60 mm, a diameter of 0.5 mm to 1.05 mm, a tensile strength of not less than 1100 MPa, and a steel fiber bending toughness value of not less than 0.4. The steel fiber product should meet the requirements of "Steel Fiber for Concrete" YB / T151-2017.

[0052] S7, finally, a non-slip surface layer made of highly wear-resistant polyurethane coating is applied on the steel fiber concrete layer 12 for sealing.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A heavy-duty vehicle roof structure, characterized by: The invention comprises a surface layer (1), an isolation layer (2), a double-layer waterproof layer (3), a leveling layer (4), a foam concrete insulation layer (5) and a roof structure layer (6) which are sequentially arranged from top to bottom; the surface layer (1) comprises a sealing layer (11) and a steel fiber concrete layer (12) which are sequentially arranged from top to bottom, and the sealing layer (11) is a highly wear-resistant polyurethane anti-skid surface layer; the roof structure layer (6) is arranged to have a sloped surface on a side close to the foam concrete insulation layer (5); The highly wear-resistant polyurethane anti-skid surface layer is combined with the steel fiber concrete layer (12) to reduce the risk of water seepage; and the foam concrete insulation layer (5) improves the thermal insulation and waterproof properties of the roof structure.

2. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The double-layer waterproof layer (3) comprises two layers of SBS modified asphalt waterproof roll waterproof layers (31).

3. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The double-layer waterproof layer (3) comprises an SBS modified asphalt waterproof coiled material waterproof layer (31) and a non-curing rubber asphalt waterproof coating layer (32).

4. The heavy-duty vehicle roof structure according to any one of claims 2 or 3, characterized in that: The thickness of the SBS modified asphalt waterproofing coiled material waterproofing layer (31) is 3 to 5 mm.

5. The heavy-duty vehicle roof structure according to claim 3, characterized in that: The thickness of the non-curing rubber asphalt waterproof coating layer (32) is 1 to 3 mm.

6. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The thickness of the steel fiber concrete layer (12) is 158-162 mm.

7. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The isolation layer (2) is a 1 mm thick felt layer.

8. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The leveling layer (4) is a cement mortar leveling layer with a thickness of 19 to 21 mm.

9. The heavy-duty vehicle roof structure according to claim 1, characterized in that: The roof structure layer (6) is a reinforced concrete roof structure layer.

Images