Steel fiber reinforced concrete seamless ground and construction method

Abstract

The steel fiber reinforced concrete seamless ground comprises a surface layer, a leveling layer, a prefabricated steel fiber reinforced concrete layer, a cast-in-place steel fiber reinforced concrete layer, a cement mortar protection layer, a waterproof layer, a plain concrete cushion layer and a graded gravel layer. Certain relative displacement is allowed to occur between the prefabricated steel fiber reinforced concrete layer and the cast-in-place steel fiber reinforced concrete layer, so that additional internal force caused by material shrinkage deformation is better released; secondly, the invention discloses a construction method of the steel fiber reinforced concrete seamless ground. The construction method comprises the steps of construction of a waterproof layer, construction of cast-in-place steel fiber reinforced concrete plates through a warehouse jumping method, hoisting construction of a prefabricated steel fiber reinforced concrete layer and construction of a surface layer. By combining the advantages of the steel fiber reinforced concrete structure and the prefabricated assembly type technology applied to the floor slab structure and avoiding the disadvantages of the steel fiber reinforced concrete structure and the prefabricated assembly type technology, the requirements of a large building for the integrity, the attractiveness and the construction period of the floor slab structure are met.

Description

Technical Field

[0001] The invention belongs to the field of general building construction and relates to a steel fiber concrete seamless floor and a construction method. Background Art

[0002] Large buildings, such as large public buildings, industrial plants and commercial centers, usually have high requirements for structural integrity, aesthetics and construction period. Their floor panel structures often adopt structures or construction processes without expansion joints and post-cast strips. If the expansion joints are eliminated in floor panel structures with larger plane dimensions, there may be structural cracking problems caused by concrete shrinkage deformation. That is, if this shrinkage deformation is restricted by the surrounding beam and column structures, tensile stress will be generated in the concrete. When the tensile stress exceeds the tensile strength of the floor panel structure, cracking will occur, which will not only affect the structural safety, but may also cause groundwater leakage problems. When the post-cast strips are eliminated in floor panel structures with larger plane dimensions, harmful cracks caused by uneven shrinkage or uneven settlement of the floor panel structure will be aggravated, further affecting the safety and normal use of the structure.

[0003] For large-size seamless floor panel structures, high-performance concrete materials represented by steel fiber concrete and advanced construction techniques can be used to ensure that prefabricated assembled floor panels have high strength as well as good durability and crack resistance. Compared with ordinary concrete, the shrinkage deformation of steel fiber concrete is significantly reduced, and the bending and compressive fatigue properties are also improved. However, the construction of steel fiber concrete requires certain techniques, such as the amount of steel fiber added and the mixing method, which will affect the performance of concrete. If the steel fiber is unevenly added or not mixed sufficiently, it may affect the performance of concrete; and the steel fiber may be affected by rust during use, especially since the floor panel structure is usually in a humid, corrosive environment, the rust problem of steel fiber is more serious, which may cause the performance of the steel fiber concrete structure to be significantly reduced.

[0004] Prefabrication is an effective solution for large-sized steel fiber concrete seamless floor panels. Prefabrication technology has the advantages of fast construction, energy saving and environmental protection, high component quality, and low engineering cost, and is widely used in industrial and civil construction. However, the application of prefabrication technology in seamless floor panel structures is relatively lagging, because the design and construction of floor panel structures are significantly affected by the formation conditions and are obviously restricted by their own uneven shrinkage or uneven settlement.

[0005] In summary, there is an urgent need to propose a steel fiber concrete seamless floor panel structure and its construction method that can overcome its own shrinkage deformation and uneven settlement and adopt prefabricated assembly technology to meet the strict requirements of large buildings on the integrity, aesthetics and construction period of the floor panel structure. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention proposes a steel fiber concrete seamless floor and a construction method, which allows a certain relative displacement between the integral prefabricated steel fiber concrete layer and the cast-in-place steel fiber concrete layer, thereby better releasing the additional internal force caused by material shrinkage and deformation. The method is suitable for the design and construction of floor panel structures of large buildings, and is beneficial for combining the advantages of steel fiber concrete structure and prefabricated assembly technology applied to floor panel structures and avoiding their disadvantages, thereby meeting the strict requirements of large buildings on the integrity, aesthetics and construction period of floor panel structures.

[0007] The first aspect of the present application discloses a steel fiber concrete seamless floor, which comprises, from top to bottom, a surface layer, a leveling layer, a prefabricated steel fiber concrete layer, a cast-in-place steel fiber concrete layer, a cement mortar protective layer, a waterproof layer, a plain concrete cushion layer and a graded sand and gravel layer; The surface layer is located on the upper surface of the floor panel structure and is in direct contact with the user and is subjected to various physical and chemical effects; The leveling layer is located below the surface layer and above the prefabricated steel fiber concrete layer, and is used to ensure the flatness of the ground structure layer; The prefabricated steel fiber concrete layer is located below the leveling layer and above the cast-in-place steel fiber concrete layer, and includes a prefabricated steel fiber concrete slab and a sliding steel top plate, and the sliding steel top plate is tightly combined with the bottom of the prefabricated steel fiber concrete slab; the prefabricated steel fiber concrete layer is prefabricated in a factory and formed in one step, without expansion joints and post-casting strips, and is hoisted to a designated position by hoisting equipment during construction; The cast-in-place steel fiber concrete layer is located below the prefabricated steel fiber concrete layer and above the cement mortar protective layer, and includes a cast-in-place steel fiber concrete slab and a sliding steel bottom plate, and the sliding steel bottom plate is tightly combined with the top of the cast-in-place steel fiber concrete slab; the sliding steel bottom plate and the sliding steel top plate cooperate with each other and allow relative displacement; The cement mortar protective layer is located below the cast-in-place steel fiber concrete layer and above the waterproof layer, and is used to protect the waterproof layer from being damaged during the construction process; The waterproof layer is located below the cement mortar protective layer and above the plain concrete cushion layer, and is used to prevent groundwater from penetrating into the building through the ground; The plain concrete cushion layer is located below the waterproof layer and above the graded sand and gravel layer, and its functions include but are not limited to ensuring the flatness of the ground structure layer and providing construction space; The graded sand and gravel layer is located below the plain concrete cushion layer and above the foundation soil, and its functions include but are not limited to evacuating accumulated water and adapting to the unevenness of the foundation.

[0008] Preferably, a process of embedding tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder is adopted between the sliding steel top plate and the sliding steel bottom plate to reduce the friction coefficient between the sliding steel top plate and the sliding steel bottom plate.

[0009] Preferably, the gap between the prefabricated steel fiber concrete layer and the surrounding structural members is filled and waterproofed, and the materials used include but are not limited to asphalt wood boards, asphalt sand boards and cement mortar.

[0010] Preferably, the foundation soil adopts an appropriate reinforcement scheme according to the properties of the soil layer, including but not limited to layered compaction, grouting reinforcement and deep mixing, so as to improve the bearing capacity and stability of the foundation and reduce foundation settlement and deformation.

[0011] Preferably, the waterproof layer comprises a waterproof coating layer and a waterproof coiled material layer.

[0012] Preferably, the cast-in-place steel fiber concrete slab adopts a skip-bin method cast-in-place process and is provided with a plurality of deformation joints.

[0013] The second aspect of the present application discloses a construction method of a steel fiber concrete seamless floor, the construction method comprising the following steps: S100, construction of waterproof layer: after the foundation treatment and surface cleaning are completed, the surrounding structural components are constructed in sequence, including the foundation under the column, the columns and beams of the bottom floor of the building; then the graded sand and gravel layer, the plain concrete cushion layer and the waterproof layer are constructed in sequence; wherein, the waterproof coating layer is evenly applied on the plain concrete cushion layer, and the junction between the floor panel structure and the surrounding structural components is repeatedly applied and strengthened; the waterproof membrane layer is laid according to the prescribed overlap method and size to ensure that the membrane is laid flat and tight, and the overlap and sealing treatment is done for the junction between the floor panel structure and the surrounding structural components; after the waterproof coating and waterproof membrane are completely dried, a closed water test is carried out to check whether the anti-leakage ability of the waterproof layer meets the requirements; after the requirements are met, the cement mortar protective layer is constructed; S200, skip-bin construction of cast-in-place steel fiber concrete slabs: the cast-in-place steel fiber concrete slabs are divided into several plane areas and the construction sequence of each plane area is determined according to the principle of interval construction, and then the pouring construction is carried out in sequence according to the construction sequence, so that the cast-in-place steel fiber concrete slabs in each plane area can reduce the negative impact caused by their own shrinkage deformation after a short period of stress release; wherein, when dividing the plane areas, according to the resistance of the cast-in-place steel fiber concrete slabs to temperature shrinkage stress and in combination with relevant specifications, the length of the plane area L Satisfies the following expression:

[0014] in, Eis the elastic modulus of steel fiber concrete, D is the thickness of the cast-in-place steel fiber concrete slab, C is the drag coefficient, f t is the tensile strength of steel fiber concrete, α is the linear elastic coefficient of steel fiber concrete, T is the comprehensive temperature difference; The joints between the cast-in-place steel fiber concrete slabs in each plane area are arranged and processed according to the requirements of construction joints to ensure the quality and strength of the joints; After the cast-in-place steel fiber concrete slabs in all plane areas are constructed and maintained, the sliding steel bottom plate is constructed and tightly connected to the cast-in-place steel fiber concrete slabs; S300, hoisting construction of prefabricated steel fiber concrete layer: embedding tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder on the upper surface of the sliding steel bottom plate, then transporting the prefabricated steel fiber concrete layer from the factory to the construction site, and accurately hoisting it to the sliding steel bottom plate through hoisting equipment, so that the sliding steel bottom plate and the sliding steel top plate cooperate with each other and allow relative displacement; the gap between the prefabricated steel fiber concrete layer and the surrounding structural members is filled and waterproofed; S400, construction of the surface layer: sequentially constructing the leveling layer and the surface layer, thereby completing the construction of a steel fiber concrete seamless floor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: in view of the requirements of large-scale building floor panel structures that adopt structures or construction processes without expansion joints and post-cast strips, the first aspect discloses a steel fiber concrete seamless floor, including a surface layer, a leveling layer, a prefabricated steel fiber concrete layer, a cast-in-place steel fiber concrete layer, a cement mortar protective layer, a waterproof layer, a plain concrete cushion layer and a graded sand and gravel layer; wherein, the negative impact of its own shrinkage and deformation is reduced by adopting steel fiber concrete, the construction quality and efficiency of the steel fiber concrete structure are improved by prefabricated assembly technology, and a certain relative displacement is allowed between the integral prefabricated steel fiber concrete layer and the cast-in-place steel fiber concrete layer to better release the additional internal force caused by the shrinkage and deformation of the material, which is conducive to combining the steel fiber concrete structure The advantages of prefabricated and assembled technology applied to ground panel structures and avoid their disadvantages, thereby meeting the strict requirements of large buildings on the integrity, aesthetics and construction period of ground panel structures; the second aspect discloses a construction method for steel fiber concrete seamless floors, including the construction of a waterproof layer, the skip-bin method construction of cast-in-place steel fiber concrete slabs, the hoisting construction of prefabricated steel fiber concrete layers and the construction of surface layers; wherein, the influence of rust on steel fiber concrete is reduced by strengthening the anti-leakage treatment of the junction between the ground panel structure and the surrounding structural members, and the negative impact of the shrinkage and deformation of the cast-in-place steel fiber concrete slab itself is reduced by the skip-bin method construction, and a method for determining the length of the plane area division in the skip-bin method construction is proposed; the construction problem of the steel fiber concrete seamless floor is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of a steel fiber concrete seamless floor of the present invention; Figure 2 It is a schematic plan view of a steel fiber concrete seamless floor according to the present invention; Figure 3 It is a flow chart of a construction method of a steel fiber concrete seamless floor according to the present invention; Figure numbers: 1-surface layer, 2-leveling layer, 3-prefabricated steel fiber concrete layer, 31-prefabricated steel fiber concrete slab, 32-sliding steel top plate, 4-cast-in-place steel fiber concrete layer, 41-cast-in-place steel fiber concrete slab, 42-sliding steel bottom plate, 5-cement mortar protective layer, 6-waterproof layer, 61-waterproof membrane layer, 62-waterproof coating layer, 7-plain concrete cushion layer, 8-graded sand and gravel layer, 91-columns of the ground floor of the building, 92-beams of the ground floor of the building. DETAILED DESCRIPTION

[0017] The following is a more detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and the accompanying drawings so that a person skilled in the art can implement the embodiments after reading the description. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The first aspect of the present application provides Figure 1-2 A steel fiber concrete seamless floor is shown, which comprises, from top to bottom, a surface layer 1, a leveling layer 2, a prefabricated steel fiber concrete layer 3, a cast-in-place steel fiber concrete layer 4, a cement mortar protective layer 5, a waterproof layer 6, a plain concrete cushion layer 7 and a graded sand and gravel layer 8; The surface layer 1 is located on the upper surface of the floor panel structure and is in direct contact with the user and is subjected to various physical and chemical effects; The leveling layer 2 is located below the surface layer 1 and above the prefabricated steel fiber concrete layer 3, and is used to ensure the flatness of the ground structure layer; The prefabricated steel fiber concrete layer 3 is located below the leveling layer 2 and above the cast-in-place steel fiber concrete layer 4, and includes a prefabricated steel fiber concrete slab 31 and a sliding steel top slab 32, and the sliding steel top slab 32 is tightly combined with the bottom of the prefabricated steel fiber concrete slab 31; the prefabricated steel fiber concrete layer 3 is prefabricated in the factory and formed in one step, without expansion joints and post-casting strips, and is hoisted to a designated position by hoisting equipment during construction; The cast-in-place steel fiber concrete layer 4 is located below the prefabricated steel fiber concrete layer 3 and above the cement mortar protective layer 5, and includes a cast-in-place steel fiber concrete slab 41 and a sliding steel bottom plate 42, and the sliding steel bottom plate 42 is tightly combined with the top of the cast-in-place steel fiber concrete slab 41; the sliding steel bottom plate 42 cooperates with the sliding steel top plate 32 and allows relative displacement; The cement mortar protective layer 5 is located below the cast-in-place steel fiber concrete layer 4 and above the waterproof layer 6, and is used to protect the waterproof layer 6 from being damaged during the construction process; The waterproof layer 6 is located below the cement mortar protective layer 5 and above the plain concrete cushion layer 7, and is used to prevent groundwater from penetrating into the building through the ground; The plain concrete cushion layer 7 is located below the waterproof layer 6 and above the graded sand and gravel layer 8, and its functions include but are not limited to ensuring the flatness of the ground structure layer and providing construction space; The graded gravel layer 8 is located below the plain concrete cushion layer 7 and above the foundation soil, and its functions include but are not limited to evacuating accumulated water and adapting to the unevenness of the foundation.

[0019] In a specific implementation, a process of embedding tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder is adopted between the sliding steel top plate 32 and the sliding steel bottom plate 42 to reduce the friction coefficient between the sliding steel top plate 32 and the sliding steel bottom plate 42 .

[0020] In a specific implementation, the gap between the prefabricated steel fiber concrete layer 3 and the surrounding structural members is filled and waterproofed, and the materials used include but are not limited to asphalt wood boards, asphalt sand boards and cement mortar.

[0021] In specific implementation, appropriate reinforcement schemes are adopted for foundation soil according to the properties of the soil layer, including but not limited to layered compaction, grouting reinforcement and deep mixing, so as to improve the bearing capacity and stability of the foundation and reduce foundation settlement and deformation.

[0022] In a specific implementation, the waterproof layer 6 includes a waterproof coating layer 62 and a waterproof coiled material layer 61 .

[0023] In a specific implementation, the cast-in-place steel fiber concrete slab 41 adopts a skip-bin method cast-in-place process and is provided with a plurality of deformation joints; The second aspect of the present application discloses Figure 3 A construction method of a steel fiber concrete seamless floor is shown, and the construction method comprises the following steps: S100, construction of waterproof layer: after the foundation treatment and surface cleaning are completed, the surrounding structural components are constructed in sequence, including the foundation under the column, the columns and beams of the bottom floor of the building; then the graded sand and gravel layer, the plain concrete cushion layer and the waterproof layer are constructed in sequence; wherein, the waterproof coating layer is evenly applied on the plain concrete cushion layer, and the junction between the floor panel structure and the surrounding structural components is repeatedly applied and strengthened; the waterproof membrane layer is laid according to the prescribed overlap method and size to ensure that the membrane is laid flat and tight without wrinkles, bubbles and other problems, and the overlap and sealing treatment is done for the junction between the floor panel structure and the surrounding structural components; after the waterproof coating and waterproof membrane are completely dry, a closed water test is carried out to check whether the anti-leakage ability of the waterproof layer meets the requirements; after the requirements are met, the cement mortar protective layer is constructed; S200, skip-bin construction of cast-in-place steel fiber concrete slabs: the cast-in-place steel fiber concrete slabs are divided into several plane areas and the construction sequence of each plane area is determined according to the principle of interval construction, and then the pouring construction is carried out in sequence according to the construction sequence, so that the cast-in-place steel fiber concrete slabs in each plane area can reduce the negative impact caused by their own shrinkage deformation after a short period of stress release; wherein, when dividing the plane areas, according to the resistance of the cast-in-place steel fiber concrete slabs to temperature shrinkage stress and in combination with relevant specifications, the length of the plane area L Satisfies the following expression: (1) in, E is the elastic modulus of steel fiber concrete, D is the thickness of the cast-in-place steel fiber concrete slab, C is the drag coefficient, f tis the tensile strength of steel fiber concrete, α is the linear elastic coefficient of steel fiber concrete, T is the comprehensive temperature difference; The joints between the cast-in-place steel fiber concrete slabs in each plane area are arranged and processed according to the requirements of construction joints to ensure the quality and strength of the joints; After the cast-in-place steel fiber concrete slabs in all plane areas are constructed and maintained, the sliding steel bottom plate is constructed and tightly connected to the cast-in-place steel fiber concrete slabs; In specific implementation, the elastic modulus of steel fiber concrete E 3×10 10 N / m 2 The thickness of the cast-in-place steel fiber concrete slab is D is 0.3m, the resistance coefficient C 1.12×10 8 N / m 2 , the tensile strength of steel fiber reinforced concrete f t 4.7×10 6 N / m 2 , the linear elastic coefficient of steel fiber concrete α For 10 -5 °C -1 , comprehensive cooling difference T is 30°C; the results calculated according to formula (1) are as follows: (2) The length of the plane area can be determined by formula (2): L Meet 12.27m≤ L ≤24.54 m; S300, hoisting construction of prefabricated steel fiber concrete layer: embedding tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder on the upper surface of the sliding steel bottom plate, then transporting the prefabricated steel fiber concrete layer from the factory to the construction site, and accurately hoisting it to the sliding steel bottom plate through hoisting equipment, so that the sliding steel bottom plate and the sliding steel top plate cooperate with each other and allow relative displacement; the gap between the prefabricated steel fiber concrete layer and the surrounding structural members is filled and waterproofed; S400, construction of the surface layer: sequentially constructing the leveling layer and the surface layer, thereby completing the construction of a steel fiber concrete seamless floor.

[0024] It can be seen that the steel fiber concrete seamless floor and construction method of the present embodiment allow a certain relative displacement between the integral prefabricated steel fiber concrete layer and the cast-in-place steel fiber concrete layer to better release the additional internal force caused by material shrinkage and deformation, meet the requirements of the structure or construction process of the floor panel structure of large buildings without expansion joints and post-cast strips, and effectively solve the construction problem of the steel fiber concrete seamless floor.

[0025] The above are one or more embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A steel fiber concrete seamless floor, characterized in that: From top to bottom, it includes the surface layer, leveling layer, prefabricated steel fiber concrete layer, cast-in-place steel fiber concrete layer, cement mortar protective layer, waterproof layer, plain concrete cushion layer and graded sand and gravel layer; The surface layer is located on the upper surface of the steel fiber concrete seamless floor; the leveling layer is located below the surface layer and above the prefabricated steel fiber concrete layer; The prefabricated steel fiber concrete layer is located below the leveling layer and above the cast-in-place steel fiber concrete layer, and includes a prefabricated steel fiber concrete slab and a sliding steel top slab, and the sliding steel top slab is tightly combined with the bottom of the prefabricated steel fiber concrete slab; The cast-in-place steel fiber concrete layer is located below the prefabricated steel fiber concrete layer and above the cement mortar protective layer, and includes a cast-in-place steel fiber concrete slab and a sliding steel bottom plate, and the sliding steel bottom plate is tightly combined with the top of the cast-in-place steel fiber concrete slab; the sliding steel bottom plate and the sliding steel top plate cooperate with each other and allow relative displacement; The cement mortar protective layer is located below the cast-in-place steel fiber concrete layer and above the waterproof layer; the waterproof layer is located below the cement mortar protective layer and above the plain concrete cushion layer; the plain concrete cushion layer is located below the waterproof layer and above the graded sand and gravel layer; the graded sand and gravel layer is located below the plain concrete cushion layer and above the foundation soil.

2. The steel fiber concrete seamless floor according to claim 1, characterized in that: The sliding steel top plate and the sliding steel bottom plate are provided with a process of inlaying tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder.

3. The steel fiber concrete seamless floor according to claim 1, characterized in that: The gaps between the prefabricated steel fiber concrete layer and the surrounding structural members are filled and waterproofed.

4. The steel fiber concrete seamless floor according to claim 1, characterized in that: The waterproof layer comprises a waterproof coating layer and a waterproof coiled material layer.

5. The steel fiber concrete seamless floor according to claim 1, characterized in that: The cast-in-place steel fiber concrete slab adopts a skip-bin method cast-in-place process and is provided with a plurality of deformation joints.

6. A construction method for a steel fiber concrete seamless floor, characterized in that: A steel fiber concrete seamless floor as claimed in any one of claims 1 to 5, comprising the following steps: S100, construction of waterproof layer: after the foundation treatment and surface cleaning are completed, the surrounding structural components are constructed in sequence, including the foundation under the column, the columns and beams of the bottom floor of the building; then the graded sand and gravel layer, the plain concrete cushion layer and the waterproof layer are constructed in sequence; wherein, the waterproof coating layer is evenly brushed on the plain concrete cushion layer, and the intersection of the floor panel structure and the surrounding structural components is brushed multiple times and strengthened; the waterproof membrane layer is laid according to the prescribed overlap method and size, and the overlap and sealing treatment is done for the intersection of the floor panel structure and the surrounding structural components; after the waterproof coating and waterproof membrane are completely dried, a closed water test is carried out to check whether the anti-leakage ability of the waterproof layer meets the requirements; after the requirements are met, the cement mortar protective layer is constructed; S200, skip-bin construction of cast-in-place steel fiber concrete slabs: the cast-in-place steel fiber concrete slabs are divided into several plane areas and the construction sequence of each plane area is determined according to the principle of interval construction, and then the pouring construction is carried out in sequence according to the construction sequence, so that the cast-in-place steel fiber concrete slabs in each plane area can reduce the negative impact caused by their own shrinkage deformation after a short period of stress release; wherein, when dividing the plane areas, according to the resistance of the cast-in-place steel fiber concrete slabs to temperature shrinkage stress and in combination with relevant specifications, the length of the plane area L Satisfies the following expression: in, E is the elastic modulus of steel fiber concrete, D is the thickness of the cast-in-place steel fiber concrete slab, C is the drag coefficient, f t is the tensile strength of steel fiber concrete, α is the linear elastic coefficient of steel fiber concrete, T is the comprehensive temperature difference; The joints between the cast-in-place steel fiber concrete slabs in each plane area are arranged and processed according to the requirements of construction joints to ensure the quality and strength of the joints; After the cast-in-place steel fiber concrete slabs in all plane areas are constructed and maintained, the sliding steel bottom plate is constructed and tightly connected to the cast-in-place steel fiber concrete slabs; S300, hoisting construction of prefabricated steel fiber concrete layer: embedding tetrafluoroethylene sheets and applying butter tetrafluoroethylene powder on the upper surface of the sliding steel bottom plate, then transporting the prefabricated steel fiber concrete layer from the factory to the construction site, and accurately hoisting it to the sliding steel bottom plate through hoisting equipment, so that the sliding steel bottom plate and the sliding steel top plate cooperate with each other and allow relative displacement; the gap between the prefabricated steel fiber concrete layer and the surrounding structural members is filled and waterproofed; S400, construction of the surface layer: sequentially constructing the leveling layer and the surface layer, thereby completing the construction of a steel fiber concrete seamless floor.

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