A strength-stable large-area basement floor structure
By combining the foundation treatment layer and the graded sand and gravel cushion layer, along with double-layer bidirectional steel mesh and pre-embedded steel reinforcement connections, the problem of unstable strength of large-area basement floors was solved, achieving overall stability and crack resistance of the floor and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR SECOND ENG BUREAU LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-30
AI Technical Summary
Existing large-area basement floors suffer from unstable strength due to problems such as uneven foundation bearing capacity, temperature changes, groundwater erosion, and weak connection between the floor and walls, which easily lead to settlement, cracks, and edge cracking.
The system employs a combined structure consisting of a foundation treatment layer, a graded sand and gravel cushion layer, a concrete reinforcement layer, and a wear-resistant surface layer. It enhances tensile strength through double-layer bidirectional steel mesh, installs drainage blind ditches and pre-embedded steel bars to connect the walls, and combines expansion joints and elastic sealant to adapt to deformation, forming a stable overall floor structure.
It improves the overall strength and stability of the floor, enabling it to withstand larger loads, reduce cracks and edge cracks, extend service life, and enhance resistance to groundwater erosion.
Smart Images
Figure CN224431910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flooring technology, specifically to a strength-stable large-area basement flooring structure. Background Technology
[0002] With the development of the construction industry, large-area basements are widely used. As a crucial component of the basement's functionality, the strength and stability of the basement floor are paramount. However, existing large-area basement floors often suffer from unstable strength due to the following problems: firstly, uneven foundation bearing capacity, leading to settlement; secondly, cracks easily appearing after large-area concrete pouring due to temperature changes and drying shrinkage; thirdly, groundwater erosion of the floor base reduces the foundation's bearing capacity; and fourthly, weak connection between the floor and walls, resulting in corner cracking. Therefore, a strength-stable large-area basement floor structure is needed to solve these problems. Utility Model Content
[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a large-area basement floor structure with stable strength. This structure improves the bearing capacity of the foundation through a foundation treatment layer, disperses the load through a graded sand and gravel cushion layer, and enhances the tensile strength through a double-layer bidirectional steel mesh in the concrete reinforcement layer. This makes the overall strength of the floor stable and able to withstand large loads, thus solving the problem of uneven bearing capacity and easy settlement of existing foundations.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a strength-stable large-area basement floor structure, comprising a foundation treatment layer, a graded sand and gravel cushion layer, a concrete reinforcement layer, and a wear-resistant surface layer arranged sequentially from bottom to top;
[0005] A drainage ditch is provided in the graded sand and gravel cushion layer, and the drainage ditch is connected to the basement sump.
[0006] The concrete reinforcement layer is provided with a double-layer bidirectional steel mesh, which is supported and fixed by stirrups; the wear-resistant surface layer is provided with expansion joints, which are filled with elastic sealant.
[0007] The reinforced concrete layer is connected to the basement wall by pre-embedded steel bars.
[0008] As a preferred embodiment of this utility model, the foundation treatment layer is formed by compaction of lime-soil, with a lime-soil ratio of 3:7 and a compaction coefficient of not less than 0.97.
[0009] As a preferred embodiment of this utility model, the thickness of the graded sand and gravel cushion layer is 200-300mm, wherein the particle size of the sand and gravel ranges from 5 to 31.5mm, and the non-uniformity coefficient is 5-10.
[0010] As a preferred embodiment of this utility model, the drainage ditch is made of permeable geotextile wrapped with crushed stone, the crushed stone has a particle size of 20-40mm, the cross-section of the ditch is an isosceles trapezoid with an upper base width of 200mm, a lower base width of 100mm, and a depth of 150-200mm.
[0011] As a preferred embodiment of this utility model, the concrete reinforcement layer is made of C30-C40 fine aggregate concrete with a thickness of 150-250mm; the double-layer bidirectional steel mesh is made of HRB400 grade steel bars with a diameter of 8-12mm and a spacing of 150-200mm.
[0012] As a preferred embodiment of this utility model, the stirrups are made of steel bars with a diameter of 10-14mm, with a spacing of 800-1000mm, and the height is the sum of the thickness of the concrete reinforcement layer minus the thickness of the upper and lower steel mesh protective layers and the diameter of the steel bars.
[0013] As a preferred embodiment of this invention, the wear-resistant surface layer is made of metal aggregate wear-resistant concrete with a thickness of 30-50mm and the surface is mechanically polished.
[0014] As a preferred embodiment of this utility model, the expansion joint spacing is 6-8m, the joint width is 20-30mm, and the expansion joint extends from the wear-resistant surface layer to the concrete reinforcement layer.
[0015] As a preferred embodiment of this utility model, the pre-embedded steel bars are HRB400 grade steel bars with a diameter of 12-16mm, embedded in the wall at a depth of not less than 300mm, extending out of the wall for a length of not less than 500mm, and tied to the steel mesh in the concrete reinforcement layer.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] 1. This utility model has stable strength: the foundation treatment layer improves the bearing capacity of the foundation, the graded sand and gravel cushion layer disperses the load, and the double-layer bidirectional steel mesh in the concrete reinforcement layer enhances the tensile strength, so that the overall strength of the floor is stable and can withstand a large load.
[0018] 2. This utility model has good crack resistance: the expansion joint is set to adapt to temperature and shrinkage deformation, and the steel mesh in the metal aggregate wear-resistant surface layer and the concrete reinforcement layer work together to effectively reduce the occurrence of cracks.
[0019] 3. This utility model has strong durability: the drainage blind ditch can drain accumulated water in time and avoid groundwater erosion; the wear-resistant surface layer improves the surface wear resistance and extends the service life of the floor.
[0020] 4. This utility model has good overall integrity: the floor and the wall are connected by pre-embedded steel bars, which enhances the overall stability and reduces the problem of corner cracking. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a top view of the structure of this utility model;
[0023] Figure 3 This is a schematic diagram of the right-side structure of this utility model;
[0024] Figure 4 This is a schematic diagram showing the structural details of the drainage blind ditch of this utility model.
[0025] In the diagram: 1. Foundation treatment layer, 2. Graded sand and gravel cushion layer, 3. Concrete reinforcement layer, 4. Wear-resistant surface layer, 5. Drainage blind ditch, 6. Sump well, 7. Double-layer bidirectional steel mesh, 8. Reinforcing bar, 9. Expansion joint, 10. Elastic sealant, 11. Embedded steel bar, 12. Wall. Detailed Implementation
[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.
[0030] Example 1
[0031] Reference Figure 1-4This is the first embodiment of the present invention, which provides a strength-stable large-area basement floor structure, including a foundation treatment layer 1, a graded sand and gravel cushion layer 2, a concrete reinforcement layer 3, and a wear-resistant surface layer 4 arranged sequentially from bottom to top;
[0032] A drainage ditch 5 is provided in the graded sand and gravel cushion layer 2, and the drainage ditch 5 is connected to the basement sump 6.
[0033] The concrete reinforcement layer 3 is provided with a double-layer bidirectional steel mesh 7, which is supported and fixed by stirrups 8; the wear-resistant surface layer 4 is provided with an expansion joint 9, which is filled with elastic sealant 10.
[0034] The concrete reinforcement layer 3 is connected to the basement wall 12 by pre-embedded steel bars 11.
[0035] The foundation treatment layer 1 is made of lime-soil compaction, with a lime-soil ratio of 3:7 and a compaction coefficient of not less than 0.97.
[0036] The thickness of the graded sand and gravel cushion layer 2 is 200-300mm, wherein the particle size of the sand and gravel ranges from 5 to 31.5mm, and the uniformity coefficient is 5-10.
[0037] Specifically, the foundation treatment layer 1 improves the bearing capacity of the foundation, the graded sand and gravel cushion layer 2 disperses the load, and the double-layer bidirectional steel mesh 7 in the concrete reinforcement layer 3 enhances the tensile strength, so that the overall strength of the floor is stable and can withstand a large load.
[0038] Example 2
[0039] The second embodiment of this utility model provides a technical solution: the drainage blind ditch 5 is made of permeable geotextile wrapped with crushed stone, the crushed stone has a particle size of 20-40mm, the cross section of the blind ditch is an isosceles trapezoid with an upper bottom width of 200mm, a lower bottom width of 100mm, and a depth of 150-200mm.
[0040] Specifically, the drainage blind ditch 5 promptly drains accumulated water to prevent groundwater erosion; the wear-resistant surface layer 4 improves surface wear resistance and extends the service life of the floor.
[0041] Example 3
[0042] The second embodiment of this utility model provides a technical solution: the concrete reinforcement layer 3 is made of C30-C40 fine stone concrete with a thickness of 150-250mm; the double-layer bidirectional steel mesh 7 is made of HRB400 grade steel bars with a diameter of 8-12mm and a spacing of 150-200mm.
[0043] Example 4
[0044] The third embodiment of this utility model provides a technical solution: the stirrup 8 is made of steel bars with a diameter of 10-14mm, with a spacing of 800-1000mm, and the height is the sum of the thickness of the concrete reinforcement layer 3 minus the thickness of the upper and lower steel mesh protective layers and the diameter of the steel bars.
[0045] The wear-resistant surface layer 4 is made of metal aggregate wear-resistant concrete with a thickness of 30-50mm and the surface is mechanically polished.
[0046] The expansion joint 9 is spaced 6 to 8 meters apart, with a joint width of 20 to 30 mm. The expansion joint 9 extends from the wear-resistant surface layer 4 to the concrete reinforcement layer 3.
[0047] The embedded steel bar 11 is made of HRB400 grade steel bar with a diameter of 12-16mm. It is embedded in the wall 12 to a depth of not less than 300mm and extends out of the wall 12 for a length of not less than 500mm. It is tied to the steel mesh in the concrete reinforcement layer 3.
[0048] Working principle:
[0049] During construction, the foundation is treated first, and the soil is laid in layers and compacted to form the foundation treatment layer 1; then graded sand and gravel are laid and compacted to form the graded sand and gravel cushion layer 2, and drainage blind ditch 5 is constructed at the same time; then double-layer bidirectional steel mesh 7 is tied and fixed with stirrups 8, and concrete reinforcement layer 3 is poured; finally, wear-resistant surface layer 4 is poured, and after the concrete has initially set, expansion joints 9 are cut and filled with elastic sealant 10.
[0050] In summary: by improving the bearing capacity of the foundation through the foundation treatment layer 1, dispersing the load through the graded sand and gravel cushion layer 2, and enhancing the tensile strength through the double-layer bidirectional steel mesh 7 in the concrete reinforcement layer 3, the overall strength of the floor is stabilized and can withstand larger loads.
[0051] Expansion joints 9 are designed to accommodate temperature changes and shrinkage deformation. The steel mesh in the metal aggregate wear-resistant surface layer 4 and the concrete reinforcement layer 3 work together to effectively reduce crack formation.
[0052] The double-layer bidirectional steel mesh, elastic sealant, stirrups, and pre-embedded steel bars used in this application can be additionally fitted with protective measures of common knowledge in this technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.
[0053] It should be noted that the double-layer bidirectional steel mesh, elastic sealant, stirrups and embedded steel bars are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method and other methods of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.
[0054] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0055] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0056] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.
[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A strength-stable large-area basement floor structure, characterized by: It includes a foundation treatment layer (1), a graded sand and gravel cushion layer (2), a concrete reinforcement layer (3), and a wear-resistant surface layer (4) arranged from bottom to top. The graded sand and gravel cushion layer (2) is provided with a drainage blind ditch (5), which is connected to the basement sump (6); The concrete reinforcement layer (3) is provided with a double-layer bidirectional steel mesh (7), which is supported and fixed by stirrups (8); the wear-resistant surface layer (4) is provided with an expansion joint (9), which is filled with elastic sealant (10). The concrete reinforcement layer (3) is connected to the basement wall (12) by pre-embedded steel bars (11).
2. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The foundation treatment layer (1) is formed by compaction of lime-soil, with a compaction coefficient of not less than 0.
97.
3. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The thickness of the graded sand and gravel cushion layer (2) is 200-300 mm, wherein the particle size of the sand and gravel ranges from 5 to 31.5 mm, and the non-uniformity coefficient is 5-10.
4. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The drainage blind ditch (5) is made of permeable geotextile wrapped with crushed stone. The crushed stone has a particle size of 20-40mm. The cross section of the blind ditch is an isosceles trapezoid with an upper bottom width of 200mm, a lower bottom width of 100mm, and a depth of 150-200mm.
5. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The concrete reinforcement layer (3) is made of C30-C40 fine stone concrete with a thickness of 150-250mm; the double-layer bidirectional steel mesh (7) is made of HRB400 grade steel bars with a diameter of 8-12mm and a spacing of 150-200mm.
6. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The stirrups (8) are made of steel bars with a diameter of 10-14 mm, with a spacing of 800-1000 mm, and the height is the sum of the thickness of the concrete reinforcement layer (3) minus the thickness of the upper and lower steel mesh protective layer and the diameter of the steel bars.
7. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The wear-resistant surface layer (4) is made of metal aggregate wear-resistant concrete with a thickness of 30-50mm and the surface is mechanically polished.
8. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The expansion joints (9) are spaced 6 to 8 m apart and have a joint width of 20 to 30 mm. The expansion joints (9) extend from the wear-resistant surface layer (4) to the concrete reinforcement layer (3).
9. The strength-stabilized large-area basement floor structure according to claim 1, characterized by: The pre-embedded steel bars (11) are HRB400 grade steel bars with a diameter of 12-16mm. They are embedded in the wall (12) to a depth of not less than 300mm and extend out of the wall (12) for a length of not less than 500mm. They are tied to the steel mesh in the concrete reinforcement layer (3).