A reinforced concrete slab with a three-dimensional grid geocell

Abstract

The present invention discloses a reinforced concrete slab with a three-dimensional grid geocell, belonging to the technical field of construction engineering. It includes upper-layer steel bars, lower-layer steel bars, a three-dimensional grid geocell, and a concrete pouring part. The three-dimensional grid geocell is arranged between the upper-layer steel bars and the lower-layer steel bars and is positioned within the slab area through a number of fixing parts. The concrete pouring part fills the three-dimensional grid geocell and is poured densely. The reinforced concrete slab with a three-dimensional grid geocell has a simple structure, strengthens the spatial stiffness of the concrete slab, solves problems such as the need to set up stirrup bars or erection bars in the reinforced concrete slab and the difficulty in laying buried pipelines in the slab, and helps with the compartment pouring or construction of the strengthening belt in the slab area. In addition, when there is a spatial structure slope in the concrete slab, the three-dimensional grid geocell can be used as an anti-slip unit to limit the sliding and accumulation of concrete aggregates towards the bottom of the slope during pouring, reduce the construction difficulty, and improve the convenience and efficiency of on-site operations.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and particularly to a reinforced concrete slab with a three-dimensional grid geocell. Background Art

[0002] In construction projects, reinforced concrete slabs are widely used as important vertical load-bearing members. Their main load-bearing parts generally include the upper and lower layers of steel bars and concrete in the slab. The existing reinforced concrete slabs have the following problems:

[0003] First, stirrup bars or erection bars need to be set at regular intervals between the upper and lower layers of steel bars in the slab to support the upper layer of steel bars in the slab and control the slab thickness. However, the processing of stirrup bars and erection bars has a cycle, which reduces the on-site efficiency. Their processing quality is also significantly affected by the construction level. When the height control is not precise enough, it is easy to cause elevation errors of the upper layer of steel bars in the slab.

[0004] Second, in combination with functional requirements, a certain amount of pipelines sometimes need to be buried secretly in the concrete slab. Generally, the pipelines are hung below the upper layer of steel bars along the laying direction. When there are multiple layers of pipelines, there are certain difficulties in both crossing and spatial fixing.

[0005] Third, in the construction of large-area concrete and mass concrete, it is usually necessary to divide the slab into several bins and organize the pouring in batches. At this time, isolation measures need to be set between the strengthening belt and the ordinary area, and between different pouring bins. At present, wire meshes are mostly used to play a blocking role. However, under the pressure of concrete pouring and vibration, the wire meshes often fail due to breakage, resulting in the failure to implement the design requirements of concrete zoning and the construction organization objectives, and causing quality defects.

[0006] Fourth, when there is a spatial structure slope in the concrete slab, if the anti-slip measures are not set properly, the concrete is prone to slip and accumulate towards the bottom of the slope under the action of its own fluidity and vibration, and it is difficult to control the slab thickness. At the same time, quality problems such as air bubbles, hollowing, and exposed steel bars often occur in the concrete in the slope top area, causing potential safety and durability hazards to the structure. Summary of the Invention

[0007] The purpose of the present invention is to propose a reinforced concrete slab with a three-dimensional grid geocell. This kind of slab component can strengthen the spatial stiffness of the concrete slab, and at the same time solve the problems in the existing reinforced concrete slabs such as the need to set stirrup bars or erection bars, the difficulty in laying pipelines secretly in the slab, the batching pouring of slab compartments, and the control of concrete pouring in spatial inclined slabs, reduce the construction difficulty, and improve the convenience and efficiency of on-site operations.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] A reinforced concrete slab with a three-dimensional grid geocell, comprising upper-layer steel bars, lower-layer steel bars, a three-dimensional grid geocell, and a concrete casting part. The three-dimensional grid geocell is arranged between the upper-layer steel bars and the lower-layer steel bars and is positioned within the slab area by a number of fixing parts. The three-dimensional grid geocell has a grid structure, and the concrete casting part is a casting formed piece of concrete aggregate. The concrete casting part uses concrete aggregate to fill the three-dimensional grid geocell and is cast densely.

[0010] Optionally, the three-dimensional grid geocell comprises a plurality of grid units and is closely arranged within the slab area.

[0011] Optionally, the grid unit is a diamond grid unit or a square grid unit.

[0012] Optionally, the height of the grid unit is equal to the clear distance between the upper-layer steel bars and the lower-layer steel bars.

[0013] Optionally, a plurality of circulation holes are provided on the grid surface of the three-dimensional grid geocell for passing through the buried pipelines in the slab and / or for the circulation of the concrete aggregate.

[0014] Optionally, the upper-layer steel bars are erected on the upper end surface of the geocell.

[0015] Optionally, the three-dimensional grid geocell is made of a rigid plastic part, a plastic-steel part or a rigid part.

[0016] Optionally, when the concrete casting part needs to be constructed in separate compartments and there are different slab areas, the aperture diameter of the circulation holes at the edge dividing line of different slab areas is smaller than the aperture diameter of the circulation holes inside each slab area to prevent excessive mutual circulation of different grades of concrete between different slab areas.

[0017] Optionally, when the slab as a whole has a spatial structure slope, the perimeter of the grid unit of the three-dimensional grid geocell at the bottom end of the slope is increased relative to the perimeter of the grid unit at the top end of the slope.

[0018] Optionally, the side length of the grid unit is 2-3 times the steel bar spacing inside the upper-layer steel bars.

[0019] Advantages of the present invention over the prior art: The three-dimensional grid geocell is arranged between the upper layer of steel bars and the lower layer of steel bars, replacing the erection bars or stirrups in the traditional reinforced concrete slab. The geocell plays a role in supporting the upper layer of steel bars, thereby improving the on-site processing efficiency, ensuring the processing quality, having a high height control accuracy, and not easily causing elevation errors of the upper layer of steel bars in the slab; the arrangement of the three-dimensional grid geocell can cancel the partition wire mesh that needs to be set due to the strengthening belt or compartment casting in the conventional slab; the circulation holes provided on the three-dimensional grid geocell can not only allow the aggregate to circulate, but also serve as a laying channel for some possible buried pipelines; when there is a spatial slope in the structural slab, such as a sloping roof or a sloping floor, the arrangement of the three-dimensional grid geocell can serve as an anti-slip unit to limit the sliding and accumulation of concrete in the direction of the bottom of the slope during the pouring of the inclined slab. In summary, the reinforced concrete slab with a three-dimensional grid geocell has a simple structure, strengthens the spatial stiffness of the concrete slab, can improve the convenience and efficiency of on-site construction, and solves some practical problems in the construction process of traditional concrete slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is an overall schematic diagram of a reinforced concrete slab with a three-dimensional grid geocell provided by the specific embodiment of the present invention;

[0021] Figure 2 FIG. is a plan schematic diagram of a reinforced concrete slab with a three-dimensional grid geocell provided by the specific embodiment of the present invention;

[0022] Figure 3 FIG. is a structural schematic diagram of the geocell of the reinforced concrete slab with a three-dimensional grid geocell provided by the specific embodiment of the present invention.

[0023] Reference numerals:

[0024] 1 - Concrete pouring part, 2 - Upper layer of steel bars, 3 - Lower layer of steel bars, 4 - Three-dimensional grid geocell, 41 - Grid unit, 42 - Fixing piece, 43 - Circulation hole, 5 - Buried pipeline, 6 - Plate area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the technical problems solved by the present invention, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0026] The following refers to Figures 1 to 3 to describe the specific structure of the reinforced concrete slab with a three-dimensional grid geocell according to the embodiments of the present invention.

[0027] As shown in Figure 1As shown in the figure, this embodiment provides a reinforced concrete slab with a three-dimensional grid geocell, which includes an upper layer of steel bars 2, a lower layer of steel bars 3, a three-dimensional grid geocell 4, and a concrete pouring part 1. The three-dimensional grid geocell 4 is arranged between the upper layer of steel bars 2 and the lower layer of steel bars 3 and is positioned within the slab area through a number of fixing parts 42. The three-dimensional grid geocell 4 has a grid structure, and the concrete pouring part 1 is filled with concrete aggregates within the three-dimensional grid geocell 4 and poured densely.

[0028] It should be noted that setting the geocell 4 between the upper layer of steel bars 2 and the lower layer of steel bars 3 replaces the erection bars or stirrup bars in the traditional reinforced concrete slab. The geocell 4 plays a role in supporting the upper layer of steel bars 2, thereby improving the on-site processing efficiency, ensuring the processing quality, having a high height control accuracy, and not easily causing elevation errors of the upper layer of steel bars 2 in the slab; the setting of the three-dimensional grid geocell can cancel the partition wire mesh required for the strengthening belt or compartment pouring in the conventional slab; the circulation holes provided on the three-dimensional grid geocell can not only enable the circulation of aggregates but also serve as a laying channel for some possible buried pipelines; when there is a spatial slope in the structural slab, such as a sloping roof or a sloping floor, the setting of the three-dimensional grid geocell can serve as an anti-slip unit to limit the sliding and accumulation of concrete in the direction of the slope bottom during the pouring of the inclined slab.

[0029] In summary, the reinforced concrete slab with a three-dimensional grid geocell has a simple structure, strengthens the spatial stiffness of the concrete slab, can improve the convenience and efficiency of on-site construction, and solves some practical problems in the construction process of traditional concrete slabs.

[0030] Optionally, the three-dimensional grid geocell 4 includes a plurality of grid units 41 and is closely arranged within the slab area. It can be understood that the plurality of grid units 41 are diamond-shaped grid units 41 or square grid units 41, which are closely arranged along the slab plane and are positioned within the slab through the fixing parts 42 before pouring. After pouring, they become a stress part within the concrete slab, improving the spatial stiffness of the slab component and also significantly improving the crack resistance of the concrete inside the thick slab.

[0031] Optionally, the height of the grid unit 41 is equal to the clear distance between the upper layer of steel bars 2 and the lower layer of steel bars 3. It can be understood that after setting the grid unit 41 and adjusting the height reasonably, the upper layer of steel bars 2 can be directly placed on the upper end of the grid unit 41, so there is no need to set the stirrup bars or erection bars in the traditional concrete slab. The height control accuracy is high, and it is not easy to cause elevation errors of the upper layer of steel bars 2 in the slab, thereby controlling the slab thickness.

[0032] Optionally, a plurality of circulation holes 43 are provided on the grid surface of the three-dimensional grid geocell 4, which are used for passing through possible buried pipelines 5 in the slab and / or circulating concrete aggregates. Therefore, the fluidity of the concrete aggregates between the grid units 41 is not affected, and the plurality of circulation holes 43 can meet the effective flow of the concrete during pouring and vibration to other compartments. At the same time, the circulation holes 43 can also serve as channels for the passing through and positioning of the buried pipelines 5 in the concrete slab.

[0033] Optionally, the three-dimensional grid geocell 4 is made of a material with a certain strength, such as a rigid plastic part, a plastic-steel part or a rigid part, so that the geocell 4 has sufficient stiffness and bearing capacity.

[0034] Optionally, when the area of the concrete slab is large and the concrete pouring part 1 needs to be constructed in compartments and there are different plate areas 6, the aperture of the circulation holes 43 located at the edge dividing line between the plate areas (such as 1 and 6) is smaller than the aperture of the circulation holes inside each plate area, so as to prevent excessive mutual circulation of concrete of different grades between different plate areas, which has a higher guarantee degree compared with the traditional isolation steel wire. Therefore, the reinforced concrete slab in this embodiment no longer sets an isolation wire mesh, so that the design requirements of concrete zoning and the construction organization objectives are implemented, with high quality, and it can be adapted to the construction of concrete with a large area and a large volume.

[0035] Optionally, when the slab as a whole has a spatial structure slope, the perimeter of the grid unit 41 of the three-dimensional grid geocell 4 at the bottom end of the slope is relatively larger than the perimeter of the grid unit 41 at the top of the slope. This means that in the case of a sloping roof or a sloping floor slab, the distribution density of the grid units 41 of the three-dimensional grid geocell 4 at the bottom of the slope is smaller than that at the top of the slope. The size of a single grid of the grid unit 41 near the bottom of the slope can be set larger, and the size of a single grid of the grid unit 41 near the top of the slope can be set smaller. At this time, the grid unit 41 actually becomes an anti-slip unit that restricts the sliding and accumulation of concrete aggregates towards the bottom of the slope during the concrete pouring process, avoiding quality problems such as air bubbles, hollowing, and exposed reinforcement in the concrete slab in the top area of the slope, with a relatively high structural safety factor and good durability. Specifically, the perimeter of the grid unit 41 of the three-dimensional grid geocell 4 can be adaptively adjusted according to the angle of the inclined slab, the workability of the concrete, the slab thickness, etc. in actual engineering.

[0036] Optionally, the side length of the grid unit 41 is 2-3 times the steel bar spacing in the upper layer of steel bars 2, where the steel bar spacing refers to the interval of the steel bars arranged unidirectionally along the horizontal direction in two perpendicular stress directions in the upper layer of steel bars 2.

[0037] It should be added that the reinforced concrete slab with a three-dimensional grid geocell can be applied to various types of slab components such as floor slabs, roof slabs or raft slabs.

[0038] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] In addition, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In the present invention, unless otherwise clearly specified and defined, terms such as "connected", "connected to", "installed", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the features defined with "first", "second" can explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0042] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A reinforced concrete slab with a three-dimensional grid geocell, characterized in that, It includes an upper layer of steel bars (2), a lower layer of steel bars (3), a three-dimensional grid geocell (4) and a concrete pouring part (1). The three-dimensional grid geocell (4) is arranged between the upper layer of steel bars (2) and the lower layer of steel bars (3) and is positioned within the slab area by a number of fixing parts (42). The three-dimensional grid geocell (4) has a grid structure. The concrete pouring part (1) is filled with concrete aggregates within the three-dimensional grid geocell (4) and poured densely. A plurality of flow holes (43) are provided on the grid surface of the three-dimensional grid geocell (4), which are used for passing through buried pipelines (5) in the slab and / or the circulation of the concrete aggregates. The three-dimensional grid geocell (4) includes a plurality of grid units (41) and is closely arranged within the slab area. When the concrete pouring part (1) needs to be constructed in compartments and there are different slab areas (6), the aperture of the flow holes (43) at the edge demarcation line of different slab areas is smaller than the aperture of the flow holes (43) inside each slab area. When the slab has a spatial structure slope as a whole, the perimeter of the grid unit (41) of the three-dimensional grid geocell (4) at the bottom of the slope is increased relative to the perimeter of the grid unit (41) at the top of the slope to limit the sliding and accumulation of the concrete aggregates towards the bottom of the slope.

2. The reinforced concrete slab with a three-dimensional grid geocell according to claim 1, characterized in that, The grid unit (41) is a diamond-shaped grid unit or a square grid unit.

3. The reinforced concrete slab with a three-dimensional grid geocell according to claim 1, characterized in that, The height of the grid unit (41) is equal to the clear distance between the upper layer of steel bars (2) and the lower layer of steel bars (3).

4. The reinforced concrete slab with a three-dimensional grid geocell according to claim 1, characterized in that, The upper layer of steel bars (2) is erected on the upper end surface of the three-dimensional grid geocell (4).

5. The reinforced concrete slab with a three-dimensional grid geocell according to claim 1, characterized in that The three-dimensional grid geocell (4) is made of a rigid plastic part or a plastic-steel part.

6. The reinforced concrete slab with a three-dimensional grid geocell according to claim 3, characterized in that The side length of the grid unit (41) is 2-3 times the steel bar spacing within the upper layer of steel bars (2).

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