Lightweight thermal-insulation high-strength fully-prefabricated concrete floor slab and floor slab connecting structure
By adopting a combined structure of lightweight concrete slabs and high-strength concrete layers in precast concrete floor slabs, combined with longitudinal and transverse steel bar binding and hoisting components design, the problems of large self-weight and high manufacturing cost of existing floor slabs are solved, and multiple effects of lightweight, high strength, good sound insulation and thermal insulation performance are achieved.
Patent Information
- Application Number
- CN202421581337.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-06-25
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing precast concrete floor slabs have heavier weight, are difficult to transport and hoist, and are manufacturing costs high, making it difficult to meet the multiple requirements of lightweight, thermal insulation, sound insulation and high strength in buildings.
A combined structure of lightweight concrete slabs and high-strength concrete layer is adopted. The lightweight concrete slabs are at the lower part of the floor slab and the high-strength concrete layer is at the upper part. The two are tied and fixed by longitudinal and transverse steel bars to form arched and raised protrusions to improve strength, and hoisting components and pipeline wiring are provided on the lightweight concrete slabs.
It realizes the lightweight, high-strength, good sound insulation and thermal insulation performance of the floor slab, reduces its own weight and manufacturing costs, and is suitable for the use of medium and high-rise buildings.
Smart Images
Figure CN222886929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of construction, and particularly relates to a lightweight, heat-insulating, high-strength and fully precast concrete floor slab and a floor slab connection structure. Background Art
[0002] In prefabricated buildings, precast floor slabs have the technical advantages of reducing on-site wet operations, being convenient, fast in assembly. In addition to meeting the requirements of force-bearing and load-bearing, the structural design of precast floor slabs also needs to consider their sound insulation and heat insulation performance. The precast floor slabs in the prior art are mainly made of a kind of concrete. Although the strength meets the load-bearing requirements, the overall self-weight of the floor slab is relatively heavy, and there are certain difficulties in transportation and hoisting, and the manufacturing cost is also relatively high. Content of the Utility Model
[0003] The utility model firstly discloses a lightweight, heat-insulating, high-strength and fully precast concrete floor slab, which has the advantages of strong bearing capacity, light structure, good sound insulation and heat insulation performance, and high economy, and is suitable for use in medium and high-rise buildings such as schools, dormitories, office buildings, apartments, and residences.
[0004] In order to achieve the above object, the technical solution adopted by the utility model is as follows:
[0005] A lightweight, heat-insulating, high-strength and fully precast concrete floor slab includes a lightweight concrete slab located at the lower part and a high-strength concrete layer poured on the top surface of the lightweight concrete slab. A plurality of longitudinal reserved grooves and a plurality of transverse reserved grooves are formed at intervals on the top surface of the lightweight concrete slab. An arched convex part is formed between adjacent longitudinal reserved grooves. The transverse reserved grooves are arranged on the arched convex part, and the transverse reserved grooves and the longitudinal reserved grooves have the same depth. The bottom surface of the lightweight concrete slab is a plane. Longitudinal steel bars are arranged in the longitudinal reserved grooves, transverse steel bars are arranged in the transverse reserved grooves, and the longitudinal steel bars and the transverse steel bars are tied and fixed.
[0006] Further, the longitudinal steel bars adopt prestressed steel bars, and the transverse steel bars adopt ordinary steel bars.
[0007] Further, the lightweight concrete slab is made of a lightweight heat-insulating material containing closed air holes.
[0008] Further, end reserved grooves are formed at the edges of the two side connection ends on the top surface of the high-strength concrete layer, and the length direction of the end reserved grooves is the same as the length direction of the longitudinal steel bars.
[0009] Further, a hoisting member is arranged on the lightweight concrete slab, and a hoisting hole is reserved on the high-strength concrete layer, and the hoisting member is exposed in the hoisting hole.
[0010] Further, the proportion of the lightweight concrete slab in the floor slab cross-section is greater than the proportion of the high-strength concrete layer in the floor slab cross-section.
[0011] Further, the proportion of the lightweight concrete slab in the floor slab section is 60% - 80%.
[0012] Further, longitudinal reserved grooves are also provided at both side edges of the lightweight concrete slab, and longitudinal steel bars are also arranged in the longitudinal reserved grooves at the edges.
[0013] Further, pipelines are laid on the top surface of the lightweight concrete slab, and the pipelines are located between the lightweight concrete slab and the high-strength concrete layer.
[0014] The present utility model also discloses a connection structure of the above floor slab, including a first floor slab, a second floor slab and a load-bearing wall. The end parts of the first floor slab and the second floor slab are respectively placed on the top of the load-bearing wall. The end reserved groove of the first floor slab is aligned with the end reserved groove of the second floor slab. Connecting steel bars are embedded in each aligned end reserved groove. One end of the connecting steel bar is located in the end reserved groove of the first floor slab, and the other end of the connecting steel bar is located in the end reserved groove of the second floor slab. Concrete is poured at the connection of the first floor slab and the second floor slab.
[0015] The floor slab designed by the present utility model is composed of two kinds of concretes with different vibration modes. Since the lower part of the floor slab is not directly stressed, lightweight concrete is used in the lower part of the floor slab in the present utility model, which can not only greatly reduce the self-weight of the floor slab, but also significantly improve the sound insulation, heat preservation and fire resistance effects of the floor slab. The upper part of the floor slab is the directly stressed part, so high-strength concrete is used to meet the high-strength bearing capacity. The combination body composed of two different concretes is lighter in structure, stronger in bearing capacity, lower in manufacturing cost, and better in fire prevention, sound insulation and heat preservation performance than the single concrete floor slab in the prior art, and can play the role of a light general beam in the building. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the lightweight heat-insulating high-strength fully precast concrete floor slab in the embodiment;
[0017] Figure 2 It is Figure 1 A schematic structural diagram from the perspective of the other side;
[0018] Figure 3 It is a schematic connection structure diagram of two lightweight heat-insulating high-strength fully precast concrete floor slabs in the embodiment.
[0019] Explanation of the Reference Numerals in the Drawings:
[0020] 1. Lightweight concrete slab; 2. Longitudinal steel bar; 3. Transverse steel bar; 4. High-strength concrete layer; 5. End reserved groove; 6. Connecting steel bar; 7. Lifting member; 8. Load-bearing wall; 9. First floor slab; 10. Second floor slab; 11. Longitudinal reserved groove; 12. Transverse reserved groove. Detailed Embodiment
[0021] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model.
[0022] This embodiment first discloses a lightweight, thermally insulating, high-strength, fully prefabricated concrete floor slab (hereinafter referred to as the "floor slab"), such as Figure 1 ( Figure 1 For the convenience of display, the upper high-strength concrete layer is removed from the edge of one side of the floor slab 4) and Figure 2 As shown in , the concrete of the floor slab is a combination of lightweight concrete and high-strength concrete. Among them, the lightweight concrete slab 1 is located at the lower part of the floor slab. The lightweight concrete slab 1 is a new type of lightweight thermal insulation material board with closed pores formed by fully foaming the foaming agent mechanically through the foaming system of the foaming machine, and evenly mixing the foam with cement, and then molded by the foaming machine. The specific strength grade can be selected according to the required strength grade. The bottom surface of the lightweight concrete slab 1 is a flat plane, but a plurality of longitudinal reserved grooves 11 and a plurality of transverse reserved grooves 12 are formed on the top surface at intervals. An arched protrusion is formed between adjacent longitudinal reserved grooves 11, and the transverse reserved grooves 12 are arranged on the arched protrusion. The depth of the transverse reserved grooves 12 is consistent with that of the longitudinal reserved grooves 11. The transverse reserved groove 12 is used to embed the transverse steel bar 3, and the longitudinal reserved groove 11 is used to embed the longitudinal steel bar 2. In order to improve the strength of the edges on both sides of the floor slab, the edges of the lightweight concrete slab 1 also form concave longitudinal reserved grooves 11, and longitudinal steel bars 2 are also arranged in the longitudinal reserved grooves 11 at the edges.
[0023] After completing the prefabrication of the above-mentioned lightweight concrete slab 1, place the lightweight concrete slab 1 in the mold with the arched raised part of the lightweight concrete slab 1 facing upward, then set longitudinal steel bars 2 in each longitudinal reserved groove, set transverse steel bars 3 in each transverse reserved groove, and tie and fix the longitudinal steel bars 2 and transverse steel bars 3. Among them, the longitudinal steel bars 2 are prestressed steel bars, which can improve the crack resistance of the structure, can effectively offset the self-weight deformation of part of the floor slab, and can use steel bars with smaller cross-sections under the same force. The transverse steel bars 3 are ordinary steel bars, which can reduce material costs. The cross-sectional size and setting spacing of the longitudinal steel bars 2 and the transverse steel bars 3 can be selected and adjusted according to the specific force conditions to achieve the best configuration. In order to facilitate hoisting during the subsequent floor slab connection, a hoisting component 7 can be pre-set at the top of the lightweight concrete slab 1 and near both ends. In order to meet the needs of pipeline routing, it is also possible to lay pipelines on the top surface of the lightweight concrete slab 1 before pouring high-strength concrete, and then pour high-strength concrete.
[0024] After arranging the longitudinal and transverse steel bars and the hoisting member 7 as described above, high-strength concrete (generally referring to concrete with a strength grade of C60 or above) is poured on the top surface of the lightweight concrete slab 1 to form a combined body with the lightweight concrete slab 1. The poured high-strength concrete forms a high-strength concrete layer 4. After curing and maintenance, demoulding is carried out, and the floor slab in this embodiment is prefabricated. When pouring high-strength concrete, hoisting holes need to be reserved at the positions corresponding to the hoisting member 7 on the high-strength concrete layer 4, so that the hoisting member 7 is exposed, which is convenient for the subsequent installation and hoisting of the floor slab. In addition, in order to facilitate the connection between the floor slabs of the above structure, end reserved grooves 5 need to be reserved at the edges of the two side connection ends on the top surface of the poured high-strength concrete layer 4 (as Figure 3 shown), and the length direction of the end reserved groove 5 is the same as the length direction of the longitudinal steel bar 3.
[0025] For the floor slab of the above structure, the ultra-light concrete at the lower part plays a role in stabilizing and protecting the steel bars, and can also reduce the self-weight and improve the sound insulation, fire prevention and heat preservation effects. The high-strength concrete at the upper part mainly bears the load and meets the bearing capacity design requirements. The proportion and shape of the two different concretes in the floor slab section can be adjusted according to the force of the floor slab. Generally, however, the proportion of the lightweight concrete slab 1 in the floor slab section is greater than the proportion of the high-strength concrete layer 4 in the floor slab section, and it is advisable that the proportion of the lightweight concrete slab 1 in the floor slab section is 60% - 80%. The top surface of the lightweight concrete slab 1 in the above floor slab is designed into a concave-convex structure. On the one hand, it is beneficial to reduce the self-weight of the floor slab. On the other hand, under the condition of ensuring the force, the usage amount of high-strength concrete can be minimized as much as possible, the cost can be further reduced, and the sound insulation, heat insulation and waterproof effects will be better.
[0026] The floor slab of the above structure can play the role of a lightweight universal beam in the building. The connection structure of two floor slabs is as Figure 3 shown. For the convenience of description, the two mutually connected floor slabs are called the first floor slab 9 and the second floor slab 10. The connection ends of the first floor slab 9 and the second floor slab 10 are placed on the top of the load-bearing wall 8, so that the end reserved groove 5 of the first floor slab 9 is aligned with the end reserved groove 5 of the second floor slab 10. Connecting steel bars 6 are embedded in each aligned end reserved groove 5. One end of the connecting steel bar 6 is located in the end reserved groove 5 of the first floor slab 9, and the other end of the connecting steel bar 6 is located in the end reserved groove 5 of the second floor slab 10. The connecting steel bar 6 connects the two floor slabs into one body, and finally concrete is poured at the connection of the first floor slab 9 and the second floor slab 10 to complete the connection of the two floor slabs.
[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lightweight, thermally insulating, high-strength, fully prefabricated concrete floor slab, characterized by: It includes a lightweight concrete slab at the bottom and a high-strength concrete layer cast on the top surface of the lightweight concrete slab. The top surface of the lightweight concrete slab is spaced to form a plurality of longitudinal reserved grooves and a plurality of transverse reserved grooves. Arched protrusions are formed between adjacent longitudinal reserved grooves. The transverse reserved grooves are arranged on the arched protrusions. The depth of the transverse reserved grooves is consistent with that of the longitudinal reserved grooves. The bottom surface of the lightweight concrete slab is a plane. Longitudinal steel bars are arranged in the longitudinal reserved grooves. Transverse steel bars are arranged in the transverse reserved grooves. The longitudinal steel bars are tied and fixed to the transverse steel bars.
2. A lightweight, thermally insulating, high-strength, fully precast concrete floor slab according to claim 1, characterized in that: The longitudinal reinforcements are prestressed reinforcements, and the transverse reinforcements are ordinary reinforcements.
3. A lightweight, thermally insulating, high-strength, fully precast concrete floor slab according to claim 1, characterized in that: The lightweight concrete slab is made of lightweight thermal insulation material containing closed pores.
4. A lightweight, thermally insulating, high-strength, fully precast concrete floor slab according to claim 1, characterized in that: The top surface of the high-strength concrete layer is provided with end reserved grooves at the edges of the connecting ends on both sides, and the length direction of the end reserved grooves is consistent with the length direction of the longitudinal steel bars.
5. The lightweight, thermal-insulating, high-strength fully precast concrete floor slab according to claim 1, characterized in that: The lightweight concrete slab is provided with a hoisting component, and a hoisting hole is reserved on the high-strength concrete layer, and the hoisting component is exposed in the hoisting hole.
6. The lightweight, thermal-insulating, high-strength, fully precast concrete floor slab according to claim 1, characterized in that: The proportion of the lightweight concrete slab in the floor slab cross section is greater than the proportion of the high-strength concrete layer in the floor slab cross section.
7. A lightweight, thermally insulating, high-strength, fully precast concrete floor slab according to claim 6, characterized in that: The lightweight concrete slab accounts for 60% to 80% of the floor slab cross section.
8. The lightweight, thermal-insulating, high-strength fully precast concrete floor slab according to claim 1, characterized in that: The edges of both sides of the lightweight concrete slab are also provided with longitudinal reserved grooves, and longitudinal steel bars are also arranged in the longitudinal reserved grooves at the edges.
9. The lightweight, thermal-insulating, high-strength fully precast concrete floor slab according to claim 1, characterized in that: The top surface of the lightweight concrete slab is paved with pipelines, and the pipelines are located between the lightweight concrete slab and the high-strength concrete layer.
10. A floor connection structure, characterized in that: It comprises the lightweight thermal insulation high-strength fully precast concrete floor and load-bearing wall as described in claim 4, the two interconnected lightweight thermal insulation high-strength fully precast concrete floor are divided into a first floor and a second floor, the ends of the first floor and the second floor are respectively placed on the top of the load-bearing wall, the end reserved groove of the first floor is aligned with the end reserved groove of the second floor, a connecting steel bar is embedded in each aligned end reserved groove, one end of the connecting steel bar is located in the end reserved groove of the first floor, and the other end of the connecting steel bar is located in the end reserved groove of the second floor, and concrete is poured at the connection between the first floor and the second floor.