A thin composite panel with prefabricated ribs
By using a precast base slab made of ultra-high performance concrete in the composite slab, and replacing the truss steel reinforcement skeleton with a convex rib plate, the problems of truss reinforcement affecting pipeline laying and steel reinforcement avoidance are solved, thus achieving efficient construction and resource conservation of thin composite slabs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CAMCE WHU DESIGN & RES CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-30
AI Technical Summary
The truss reinforcement in the precast base slab of the existing composite slab affects the laying and installation of pipelines and the arrangement and insertion of reinforcement. The reinforcement protrudes and avoids obstacles, resulting in large mold wear. The need for custom-made openings in the mold leads to low construction efficiency, high cost and serious waste of resources.
The precast base slab is made of ultra-high performance concrete. The precast base slab consists of a thin precast base slab and multiple convex ribs 120. Multiple convex ribs at the bottom of the thin precast slab replace the truss steel skeleton at the top of the traditional precast base slab. The U-shaped bars in the convex ribs overlap with the bottom bidirectional reinforcing bars in the cast-in-place reinforced concrete layer. The longitudinal bars of the convex ribs do not protrude. The hanging bars penetrate through the top of the thin precast slab and fill it densely.
It solved the problems of truss reinforcement affecting pipeline laying and installation and reinforcement avoidance, improved construction and installation efficiency, reduced composite slab thickness, saved resources, and reduced construction and installation costs.
Smart Images
Figure CN224431775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, specifically to a thin composite slab with prefabricated convex ribs. Background Technology
[0002] With the development of modern industrialization in construction, composite slabs have significant advantages in improving construction efficiency and building quality.
[0003] Currently, precast base plates in composite slabs have protruding reinforcement bars, which affect all aspects from design to construction. The design must consider the avoidance of the protruding reinforcement bars with the reinforcement bars of beams, walls and columns, which increases the workload of detailed design. When the slab has protruding reinforcement bars, the mold needs to be perforated. Different slab and reinforcement bar diameters and spacings make it impossible to reuse the perforated molds, resulting in high mold wear.
[0004] Traditional composite slabs require a minimum precast base slab thickness of 60mm and a cast-in-place reinforced concrete layer thickness of 70mm, resulting in a minimum composite slab thickness of 130mm. Regardless of the span size, the minimum thickness of the composite slab is 130mm. This limitation on slab thickness directly leads to an increase in the steel content of the floor slab, severely restricting the sustainable development of composite slabs in terms of economic efficiency.
[0005] In addition, the precast base plate of the composite slab has truss reinforcement, which affects the laying and installation of pipelines in the composite slab. When encountering openings in the floor slab, the truss reinforcement needs to be adjusted to avoid them. Compared with traditional cast-in-place floor slabs, the truss reinforcement increases the steel content, resulting in low construction and installation efficiency and higher cost, which directly affect the construction and installation cost of composite slabs. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a thin composite plate with prefabricated convex ribs to overcome the shortcomings of the prior art.
[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0008] A thin composite slab with precast convex ribs includes: a precast base slab cast from ultra-high performance concrete, the precast base slab being composed of a thin precast slab and multiple convex ribs located at the bottom of the thin precast slab, the two ends of the U-shaped bars in the convex ribs penetrating the top of the thin precast slab, a cast-in-place reinforced concrete layer being cast on top of the thin precast slab in the precast base slab, the two ends of the U-shaped bars lapping with the bottom bidirectional reinforcing bars in the cast-in-place reinforced concrete layer, and multiple convex ribs at the bottom of the thin precast slab being distributed along and parallel to the bottom main reinforcing bars in the cast-in-place reinforced concrete layer.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, the convex rib plate has multiple lifting rods that serve as lifting points. One end of the lifting rod overlaps with the longitudinal reinforcement of the convex rib plate, and the other end passes through the top of the thin precast slab. The convex rib plate is filled with ultra-high performance concrete within a 500mm range on both sides of the lifting rod.
[0011] Furthermore, the areas within the convex rib plate without lifting points are hollow grooves.
[0012] Furthermore, the cross-sectional outer contour shape of the hollow groove is composed of an isosceles trapezoid located at the top (smaller at the top and larger at the bottom) and an isosceles trapezoid located at the bottom (larger at the top and smaller at the bottom).
[0013] Furthermore, the outer contour of the cross-section of the convex rib plate is an isosceles trapezoid that is larger at the top and smaller at the bottom.
[0014] Furthermore, the distance between the protruding rib at the bottom of the thin precast slab and the side of the thin precast slab is no more than 300mm.
[0015] Furthermore, the thickness of the thin precast slab is 10mm to 20mm.
[0016] Furthermore, adjacent precast base slabs are connected by tight joints.
[0017] Furthermore, the cast-in-place reinforced concrete layer contains bottom bidirectional reinforcing bars and top bidirectional reinforcing bars.
[0018] Furthermore, the distance between the lower surface of the convex rib plate and the upper surface of the cast-in-place reinforced concrete layer is greater than or equal to 100 mm.
[0019] The beneficial effects of this utility model are:
[0020] In this scheme, the protruding rib plate at the bottom of the precast base plate replaces the truss steel reinforcement skeleton at the top of the traditional precast base plate, which solves the problem of existing precast composite slab truss reinforcement affecting pipeline laying and installation, and the problem of interlocking and overlapping floor slab reinforcement, thus improving construction and installation efficiency.
[0021] The longitudinal reinforcement of the convex rib plate in the precast base slab does not protrude, which solves the problems of the reinforcement protruding in the precast base slab of existing composite slabs and the avoidance of the reinforcement of beams, walls and columns, the custom opening of precast molds and installation, and improves construction efficiency.
[0022] The precast base plate in this scheme can effectively reduce the thickness of the composite slab. Specifically, after optimization and adjustment, the thickness of the composite slab can be reduced to 100mm, which effectively saves resources. On-site binding of floor slab reinforcement can overcome the problem of reinforcement avoidance. Attached Figure Description
[0023] Figure 1 This is a top view of a thin composite slab with prefabricated ribs in the prior art;
[0024] Figure 2 for Figure 1Cross-sectional view along the AA direction;
[0025] Figure 3 for Figure 1 Cross-sectional view of the middle BB direction.
[0026] The attached diagram lists the components represented by each number as follows:
[0027] 1. Precast base slab, 110. Thin precast slab, 120. Raised rib plate, 121. U-shaped reinforcement, 122. Hanging reinforcement, 123. Longitudinal reinforcement of raised rib plate, 124. Hollow groove, 2. Cast-in-place reinforced concrete layer, 210. Bottom bidirectional reinforcement, 220. Top bidirectional reinforcement, 3. Tight joint. Detailed Implementation
[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0029] Example 1
[0030] like Figure 1 , Figure 2 , Figure 3 As shown, a thin composite slab with precast ribs includes: a precast base slab 1 cast using ultra-high performance concrete (UHPC), the precast base slab 1 being composed of a thin precast slab 110 and multiple ribs 120 located at the bottom of the thin precast slab 110; no steel mesh is placed inside the thin precast slab 110, and no truss reinforcement is set above the thin precast slab 110; the two ends of the U-shaped ribs 121 within the ribs 120 penetrate the top of the thin precast slab 110, i.e., within the ribs 120... The two ends of the U-shaped reinforcement 121 are located above the thin precast slab 110. A cast-in-place reinforced concrete layer 2 is poured on top of the thin precast slab 110 in the precast base slab 1. During pouring, the two ends of the U-shaped reinforcement 121 overlap with the bottom bidirectional reinforcing bars 210 in the cast-in-place reinforced concrete layer 2. Multiple convex ribs 120 at the bottom of the thin precast slab 110 are distributed along the direction of the bottom main reinforcing bars in the cast-in-place reinforced concrete layer 2, and the convex ribs 120 are parallel to the bottom main reinforcing bars in the cast-in-place reinforced concrete layer 2.
[0031] In this scheme, the protruding rib plate 120 at the bottom of the precast base plate 1 replaces the truss steel reinforcement skeleton at the top of the traditional precast base plate, which solves the problem of existing precast composite slab truss reinforcement affecting pipeline laying and installation, and the problem of interlocking and overlapping floor slab reinforcement, thus improving construction and installation efficiency.
[0032] The longitudinal reinforcement 123 of the convex rib plate 120 in the precast base plate 1 does not protrude, which solves the problems of the reinforcement protruding in the precast base plate of existing composite slabs and the avoidance of the reinforcement of beams, walls and columns, the custom opening of precast molds and installation, and improves construction efficiency.
[0033] The precast base plate 1 in this scheme can effectively reduce the thickness of the composite slab. Specifically, after optimization and adjustment, the thickness of the composite slab can be reduced to 100mm, which effectively saves resources and allows for on-site binding of floor slab reinforcement, overcoming the problem of reinforcement avoidance.
[0034] Example 2
[0035] like Figure 1 , Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:
[0036] The convex rib plate 120 has multiple suspension rods 122 as suspension points. One end of the suspension rod 122 overlaps with the longitudinal reinforcement 123 of the convex rib plate 120, and the other end of the suspension rod 122 passes through the top of the thin precast slab 110. That is, the convex rib plate 120 has U-shaped reinforcement 121, suspension rods 122 and longitudinal reinforcement 123. The longitudinal reinforcement 123 of the convex rib plate 120 does not protrude. The convex rib plate 120 is filled with ultra-high performance concrete (UHPC) within a 500mm range on both sides of the suspension rod 122.
[0037] Furthermore, the section without lifting points within the convex rib plate 120 is a hollow groove 124. The outer contour of the cross-section of the hollow groove 124 is a combination of an isosceles trapezoid located at the top (smaller at the top and larger at the bottom) and an isosceles trapezoid located at the bottom (larger at the top and smaller at the bottom). The base of the upper isosceles trapezoid is equal to the top of the lower isosceles trapezoid. The outer contour of the cross-section of the convex rib plate 120 is an isosceles trapezoid located at the top and smaller at the bottom. This design can increase the out-of-plane stiffness of the precast base plate 1.
[0038] Example 3
[0039] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:
[0040] The distance between the protruding rib plate 120 at the bottom of the thin precast slab 110 and the side of the thin precast slab 110 is no more than 300mm, and the thickness of the thin precast slab 110 is 10mm to 20mm.
[0041] Example 4
[0042] like Figure 2 , Figure 3 As shown, this embodiment is a further improvement on any one of embodiments 1 to 3, as detailed below:
[0043] Multiple precast base slabs 1 are arranged side by side, and a cast-in-place reinforced concrete layer 2 covers the multiple precast base slabs 1. Adjacent precast base slabs 1 are connected by a tight joint 3.
[0044] The cast-in-place reinforced concrete layer 2 has bottom bidirectional reinforcing bars 210 and top bidirectional reinforcing bars 220.
[0045] Example 5
[0046] like Figure 2 , Figure 3 As shown, this embodiment is a further improvement on any one of embodiments 1 to 4, as detailed below:
[0047] The distance between the lower surface of the convex rib plate 120 and the upper surface of the cast-in-place reinforced concrete layer 2 is greater than or equal to 100mm.
[0048] The construction method for thin composite slabs with prefabricated ribs in this scheme includes the following steps:
[0049] S01. Based on the building function layout plan of structural beams and slabs, the floor slab is divided into standardized composite slabs.
[0050] S02. First, standardize the design of the dimensions of the precast base plate components in the standardized composite slabs that have been split, and then classify the precast base plate components.
[0051] S03. Select a reasonable width based on the span of the split precast base plate, and perform demolding and hoisting verification, weight of the post-poured reinforced concrete layer and two-stage stress calculation under the action of construction load. Then, determine the thickness of the precast base plate based on the calculation results, select a reasonable rib plate spacing and rib plate cross-sectional size, and form a standardized and modular precast base plate.
[0052] S04. Process the precast base plate mold according to the designed precast base plate dimensions;
[0053] S05. Tie the longitudinal reinforcement, U-shaped reinforcement, and suspension reinforcement at the location of the suspension point according to the designed arrangement of the convex ribs.
[0054] S06. Thin precast slabs and ribbed slabs are cast using ultra-high performance concrete (UHPC), and the precast base slab is obtained after curing and demolding.
[0055] S07. After the precast base plate is hoisted and transported to the construction site according to the hoisting points, the components are inspected and accepted. If the acceptance fails, it is returned to the factory for repair and reinforcement. If it cannot be repaired, it is scrapped. If the acceptance passes, the on-site construction hoisting and installation are carried out.
[0056] S08. When hoisting and installing the precast base plate, the protruding ribs of the precast base plate should be properly supported before the bottom bidirectional reinforcing bars and the top bidirectional reinforcing bars of the cast-in-place reinforced concrete layer are tied. Then, the concrete strength and thickness required by the design are poured. After the concrete is cured, a thin composite slab with precast protruding ribs can be obtained.
[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A thin laminated sheet having a preformed raised ribbed sheet, characterized by, include: The precast base slab (1) is made of ultra-high performance concrete. The precast base slab (1) is composed of a thin precast slab (110) and a plurality of convex ribs (120) at the bottom of the thin precast slab (110). The two ends of the U-shaped bars (121) in the convex ribs (120) penetrate the top of the thin precast slab (110). A cast-in-place reinforced concrete layer (2) is poured on the top of the thin precast slab (110) in the precast base slab (1). The two ends of the U-shaped bars (121) overlap with the bottom bidirectional reinforcing bars (210) in the cast-in-place reinforced concrete layer (2). The plurality of convex ribs (120) at the bottom of the thin precast slab (110) are distributed along the direction of the bottom main reinforcing bars in the cast-in-place reinforced concrete layer (2) and are parallel to them.
2. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The convex rib plate (120) has multiple lifting rods (122) as lifting points. One end of the lifting rod (122) overlaps with the longitudinal reinforcement (123) of the convex rib plate (120), and the other end passes through the top of the thin precast slab (110). The convex rib plate (120) is filled with ultra-high performance concrete within a 500mm range on both sides of the lifting rod (122).
3. A thin composite slab with prefabricated ribs according to claim 2, characterized in that, The part of the convex rib plate (120) without a lifting point is a hollow groove (124).
4. A thin composite slab with prefabricated ribs according to claim 3, characterized in that, The cross-sectional outer contour shape of the hollow groove (124) is a combination of an isosceles trapezoid located at the top (smaller at the top and larger at the bottom) and an isosceles trapezoid located at the bottom (larger at the top and smaller at the bottom).
5. A thin composite slab with prefabricated ribs according to any one of claims 1 to 4, characterized in that, The cross-sectional outer contour of the convex rib plate (120) is an isosceles trapezoid with a larger upper section and a smaller lower section.
6. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The distance between the protruding rib (120) at the bottom of the thin precast slab (110) and the side of the thin precast slab (110) is no more than 300mm.
7. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The thickness of the thin precast slab (110) is 10mm to 20mm.
8. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The two adjacent precast base plates (1) are connected by a tight joint (3).
9. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The cast-in-place reinforced concrete layer (2) has bottom bidirectional reinforcing bars (210) and top bidirectional reinforcing bars (220) in the concrete.
10. A thin composite slab with prefabricated ribs according to claim 1, characterized in that, The distance between the lower surface of the convex rib plate (120) and the upper surface of the cast-in-place reinforced concrete layer (2) is greater than or equal to 100 mm.