Prestressed hollow slab structure with circular-truncated-cone-shaped cushion blocks

Abstract

A prestressed hollow slab structure with circular-truncated-cone-shaped cushion blocks comprises a bottom formwork used for forming a newly-poured concrete structure, a concrete structure framework used for enhancing the bearing capacity of the concrete structure is arranged on the bottom formwork, and a filling box used for reducing the dead weight of the concrete structure is arranged on one side of the concrete structure framework. The concrete structure framework is connected with a clamping supporting piece used for supporting the filling box body and preventing the clamping supporting piece from toppling over, the clamping supporting piece in the prestressed hollow slab structure can enable the clamping groove to be clamped on the first steel bar structure through the clamping supporting legs and the clamping groove, and the clamping supporting piece is prevented from toppling over in the construction process of the hollow slab structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building construction, especially a prestressed hollow slab structure with circular truncated cone type cushion block. BACKGROUND

[0002] The prestressed concrete hollow slab is the most widely used load-bearing component in industrial and civil buildings in China, and the annual use area is in the order of 100 million square meters. At present, for large-span prestressed hollow slabs, the filling box volume between the rib beams is large, and the gap between the bottom formwork and the filling box is relatively small. In the pouring process, the concrete can only flow from the rib beam to the bottom of the box by using its own flowability, which easily leads to incomplete concrete vibration. During the construction process of the hollow slab, the traditional cushion block is extremely easy to tip over during the concrete flow process due to the large buoyancy of the light filling box, and it is impossible to ensure that there is enough space between the bottom formwork and the filling box, thereby leading to non-dense concrete pouring or large concrete structure size deviation. In severe cases, the lower steel bars can sink into the filling box due to the upper construction load. SUMMARY

[0003] In order to overcome the problem that the traditional cushion block is extremely easy to tip over during the concrete flow process, it is impossible to ensure that there is enough space between the bottom formwork and the filling box, thereby leading to non-dense concrete pouring, the technical problem to be solved by the utility model is to provide a prestressed hollow slab structure with a circular truncated cone type cushion block. The utility model is realized by the following technical solutions:

[0004] A prestressed hollow slab structure with a circular truncated cone type cushion block, comprising a bottom formwork for forming a new poured concrete structure, wherein the bottom formwork is provided with a concrete structure framework for enhancing the load-bearing capacity of the concrete structure, one side of the concrete structure framework is provided with a filling box for reducing the self-weight of the concrete structure, and the concrete structure framework is connected with a clamping support for supporting the filling box and preventing itself from tipping over.

[0005] The prestressed hollow slab structure with a circular truncated cone type cushion block, as described above, wherein the clamping support comprises a support portion for abutting against the filling box to form a gap between the bottom formwork and the filling box, and a clamping portion clamped on the concrete structure framework for limiting the overturning of the clamping support.

[0006] The prestressed hollow slab structure with a circular truncated cone type cushion block, as described above, wherein the support portion is a cylindrical truncated cone.

[0007] The prestressed hollow slab structure with a circular truncated cone type cushion block, as described above, wherein the cylindrical truncated cone is provided with a truncated cone plane parallel to the outer surface of the filling box.

[0008] As described above, in a prestressed hollow slab structure with a frustum-shaped pad, the snap-fit ​​part includes snap-fit ​​legs and snap-fit ​​grooves, and the snap-fit ​​support is locked onto the concrete structural frame by connecting the snap-fit ​​grooves.

[0009] As described above, in a prestressed hollow slab structure with a frustum-shaped pad, the snap-fit ​​groove is cross-shaped.

[0010] As described above, in a prestressed hollow slab structure with frustum-shaped pads, the dimensions of the snap-fit ​​groove are the same as the external dimensions of the concrete structural frame.

[0011] As described above, a prestressed hollow slab structure with frustum-shaped pads includes a concrete structural skeleton comprising a first reinforcing steel structure at the bottom of the infill box, rib stirrups on the outer periphery of the infill box, and a second reinforcing steel structure at the top of the infill box.

[0012] As described above, in a prestressed hollow slab structure with frustum-shaped pads, an anti-buoyancy component is provided between the bottom template and the first reinforcing steel structure to restrict the floating of the filling box.

[0013] As described above, a prestressed hollow slab structure with a frustum-shaped pad is provided on the upper part of the filling box to limit the upward floating of the filling box.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The snap-fit ​​support in this prestressed hollow slab structure uses snap-fit ​​legs and snap-fit ​​grooves to lock the snap-fit ​​grooves onto the first steel reinforcement structure, preventing it from tipping over during the construction of the hollow slab structure.

[0016] 2. By using the snap-fit ​​grooves to snap onto the ribs and stirrups around the filling box, the horizontal displacement of the box can be effectively limited, ensuring the orderly progress of the hollow slab structure construction process and the accuracy of the rib structure dimensions.

[0017] 3. The cylindrical frustum can increase the stress area between the snap-fit ​​support and the infill box, preventing the pad from sinking into the infill box when the snap-fit ​​support bears the upper construction load. Ultimately, it ensures that there is enough gap between the bottom formwork and the infill box, so that the concrete can flow from the rib beam to the bottom of the box, thereby ensuring the dimensional and quality effect of the concrete structure. [Attached Image Description]

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Fig. 1This is a front view schematic diagram of a prestressed hollow slab structure with a frustum-shaped pad according to the present invention;

[0020] Fig. 2 This is a schematic diagram of a prestressed hollow slab structure snap-fit ​​support component with a frustum-shaped pad according to the present invention.

[0021] Fig. 3 This is a top view schematic diagram of a prestressed hollow slab structure snap-fit ​​support component with a frustum-shaped pad according to the present invention.

Detailed Implementation Methods

[0022] To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0023] Please see Figs. 1 to 3 A prestressed hollow slab structure with frustum-shaped pads includes a bottom formwork 1 for forming the freshly poured concrete structure. The bottom formwork 1 has a concrete structural frame 2 for enhancing the load-bearing capacity of the concrete structure. One side of the concrete structural frame 2 has an infill box 3 for reducing the self-weight of the concrete structure. The concrete structural frame 2 is connected to a snap-fit ​​support 5 for supporting the infill box 3 and preventing it from tipping over. The snap-fit ​​support is a frustum-shaped pad. During the construction of the prestressed hollow slab, due to the large buoyancy of the lightweight infill box, traditional pads are prone to tipping over during concrete flow, making it impossible to ensure sufficient space between the bottom formwork and the infill box. This results in incomplete concrete pouring or significant dimensional deviations in the concrete structure. In severe cases, the lower reinforcing bars may sink into the infill box due to the upper construction load. The snap-fit ​​support ensures sufficient gap between the infill box and the bottom formwork, allowing cement to flow to the bottom of the infill box during pouring, thereby guaranteeing the dimensional and quality results of the concrete structure.

[0024] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the snap-fit ​​support 5 includes a support part 51 for abutting against the filling box 3 to form a gap between the bottom template 1 and the filling box 3, and a snap-fit ​​part 52 for snapping onto the concrete structure frame 2 to limit its own overturning. The snap-fit ​​part prevents the pad block from sinking into the filling box when the snap-fit ​​support bears the upper construction load, thus preventing it from tipping over during the construction of the hollow slab.

[0025] Furthermore, as a preferred embodiment of this solution and not a limitation, the support 51 is a cylindrical frustum 510. The cylindrical frustum 510 has a frustum plane 511 that is parallel to the outer surface of the filling box 3, so that the force-bearing surface of the support 51 is maximized. The shape of the frustum can expand the force-bearing area between the support and the box, which is used to distribute the load.

[0026] Furthermore, as a preferred embodiment of this solution and not a limitation, the snap-fit ​​part 52 includes snap-fit ​​legs 521 and snap-fit ​​grooves 522. The snap-fit ​​support 5 is locked onto the concrete structural frame 2 by connecting the snap-fit ​​grooves 522. The snap-fit ​​grooves 522 are cross-shaped and have the same dimensions as the concrete structural frame 2 for mutual engagement, so that the snap-fit ​​support is tightly snapped onto the concrete structural frame 2. The snap-fit ​​support is a frustum-shaped pad, which can effectively limit the horizontal displacement of the filling box, ensure the orderly construction of the hollow slab structure, and ensure the accuracy of the rib beam structure dimensions.

[0027] Furthermore, as a preferred embodiment of this solution and not a limitation, the concrete structural skeleton 2 includes a first reinforcing steel structure 21 disposed at the bottom of the infill box 3, ribbed stirrups 32 disposed on the outer periphery of the infill box 3, and a second reinforcing steel structure 33 disposed at the top of the infill box. The snap-fit ​​support 5 is disposed on the first reinforcing steel structure 21 and the ribbed stirrups 32. The ribbed stirrups can restrict the lateral deformation of the concrete, improve the shear resistance and seismic performance of the structure, and the first reinforcing steel structure disposed at the bottom of the infill box can provide tensile strength at the bottom to prevent the concrete from cracking under pressure. The second reinforcing steel structure at the top further strengthens the structural strength of the top area to ensure that the entire infill box has sufficient load-bearing capacity at both the top and bottom.

[0028] Furthermore, as a preferred embodiment of this solution and not a limitation, an anti-buoyancy component 18 is provided between the bottom template 1 and the first steel reinforcement structure 21 to restrict the floating of the filling box 3. The anti-buoyancy component can ensure that the filling box is accurately placed according to the requirements of the design drawings, and avoids it from moving due to buoyancy when pouring concrete, thereby ensuring the safety and reliability of the structure.

[0029] Furthermore, as a preferred embodiment of this solution and not a limitation, the upper part of the filling box 3 is provided with a limiting block 19 to restrict the upward floating of the filling box 3. The limiting block can effectively fix the position of the filling box and prevent it from rising due to buoyancy during concrete pouring, ensuring that the structure is accurately formed according to design requirements.

[0030] The working principle of this embodiment is as follows:

[0031] A prestressed hollow slab structure with frustum-shaped pads is disclosed. After the bottom formwork is constructed, the first reinforcing steel structure and rib beam reinforcement are tied, and anti-buoyancy components are installed. Then, the snap-fit ​​support is locked onto the concrete structural frame, so that the snap-fit ​​groove connects to the concrete structural frame. The cylindrical frustum can increase the force-bearing area between the cylinder and the infill box by increasing the area of ​​the cylinder, preventing the snap-fit ​​support from sinking into the infill box when bearing the upper construction load. This ensures that there is sufficient gap between the bottom formwork and the infill box, allowing concrete to flow from the rib beam to the bottom of the infill box, thereby ensuring the quality of concrete construction. The snap-fit ​​groove can be snapped onto the stirrups of the rib beam around the infill box, which can effectively limit the horizontal displacement of the infill box and ensure the accuracy of the rib beam structure dimensions. Finally, by setting the upper limiting pad and installing the second reinforcing steel, the spatial position of the infill box is restricted, ultimately ensuring the forming size and quality of the prestressed hollow slab structure.

[0032] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A prestressed hollow slab structure with frustum-shaped pads, characterized in that, It includes a bottom formwork (1) for forming a newly poured concrete structure, a concrete structure frame (2) for enhancing the load-bearing capacity of the concrete structure on the bottom formwork (1), a filling box (3) for reducing the self-weight of the concrete structure on one side of the concrete structure frame (2), and a snap-fit ​​support (5) for supporting the filling box (3) and preventing itself from tipping over on the concrete structure frame (2).

2. A prestressed hollow slab structure with frustum-shaped pads according to claim 1, characterized in that... The snap-fit ​​support (5) includes a support part (51) for abutting against the filling box (3) to form a gap between the bottom template (1) and the filling box (3), and a snap-fit ​​part (52) for locking onto the concrete structure frame (2) to restrict its own rotation.

3. A prestressed hollow slab structure with frustum-shaped pads according to claim 2, characterized in that... The support part (51) is a cylindrical frustum (510).

4. A prestressed hollow slab structure with frustum-shaped pads according to claim 3, characterized in that... The cylindrical frustum (510) has a frustum plane (511) that is parallel to the outer surface of the filling box (3).

5. A prestressed hollow slab structure with frustum-shaped pads according to claim 2, characterized in that... The snap-fit ​​part (52) includes a snap-fit ​​leg (521) and a snap-fit ​​groove (522). The snap-fit ​​support (5) is locked onto the concrete structure frame (2) by connecting the snap-fit ​​groove (522).

6. A prestressed hollow slab structure with frustum-shaped pads according to claim 5, characterized in that... The snap-fit ​​groove (522) is cross-shaped.

7. A prestressed hollow slab structure with frustum-shaped pads according to claim 6, characterized in that... The dimensions of the snap-fit ​​groove (522) are the same as the external dimensions of the concrete structure frame (2).

8. A prestressed hollow slab structure with frustum-shaped pads according to claim 1, characterized in that... The concrete structural skeleton (2) includes a first steel reinforcement structure (21) set at the bottom of the filling box (3), rib stirrups (32) set on the outer periphery of the filling box (3), and a second steel reinforcement (33) set on the upper part of the filling box (3).

9. A prestressed hollow slab structure with frustum-shaped pads according to claim 8, characterized in that... An anti-buoyancy component (18) is provided between the bottom template (1) and the first steel reinforcement structure (21) to restrict the floating of the filling box (3).

10. A prestressed hollow slab structure with frustum-shaped pads according to claim 9, characterized in that... The upper part of the filling box (3) is provided with a limiting pad (19) to restrict the upward floating of the filling box (3).

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