Large-volume box type underground concrete top plate

Abstract

The utility model provides a large-volume box-type underground concrete top plate, a plurality of foam core molds are arranged in the top plate in the direction of crossing an empty bin, a longitudinal bamboo grate framework is arranged on the outer side of each foam core mold, and a plurality of stirrups are arranged on the outer side of each bamboo grate framework for fixing. The utility model has the beneficial effects that the column type foam core molds are discontinuously placed in the top plate of the box type mechanism, and the longitudinal bamboo grate framework is tightly attached to the peripheral stirrups of the foam core molds to be fixed, so that the rigidity of the core molds is improved. The hollow top plate is arranged to reduce the self weight of the top plate, improve the bearing pressure of the cavity top plate and improve the stability of the box-type concrete underground road. And the use amount of steel bars and concrete is reduced, so that the cost is reduced. And moreover, the span is large, and the method is suitable for large-span and large-space buildings. The construction speed is high and the period is shortened. And the self structure has better stability and wide popularization prospect.

Description

Technical Field

[0001] The utility model relates to the field of construction, in particular to a large-volume box-type underground concrete top plate. Background Art

[0002] In the construction process of large-volume box-type concrete structures in municipal engineering, it is common to use cast-in-place method for overall pouring. However, as the span increases, the weight of the structure itself also increases. When the weight of the structure itself exceeds the weight range it can bear, the bending moment inside the structure exceeds the limit state, and cracks appear in the structure, resulting in poor overall stability of the concrete structure. The overall structure is easily damaged, causing the structure itself to be unstable, thus affecting the overall quality of the structure.

[0003] In order to avoid excessive weight of the top plate of the long-span structure, a box-type concrete slab is often used. Under the premise of ensuring the strength of the concrete slab, it can also have a relatively high mechanical strength. However, in actual application, we found that water marks, fish scales, cold joints, and looseness appeared on the top. In order to enhance the mechanical properties of the box-type concrete foundation, it is urgent to improve the current box-type concrete structure.

[0004] Application No. 201510485828.5 discloses a box foundation, in which the middle part of the box foundation is hollowed out to form a lattice structure. Compared with the traditional box foundation, it can save a lot of concrete and has a low project cost. However, it does not improve the mechanical structure to address the phenomenon of cracking of the box foundation, and this structure cannot be applied to large box foundations. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the problems of water marks, fish scale marks, cold joints and looseness on the top of large-volume box foundations are solved.

[0006] The utility model provides a large-volume box-type underground concrete top plate, wherein a plurality of foam core molds are arranged in the top plate across the empty space direction, a longitudinal bamboo grate frame is arranged outside the foam core mold, and a plurality of stirrups are arranged outside the bamboo grate frame for fixing.

[0007] Furthermore, a bottom layer of top plate steel bars is laid at the bottom of the top plate, and a top layer of top plate steel bars is laid at the top of the top plate.

[0008] Furthermore, a bottom arc-shaped pillow bar is arranged at the lower end of the foam core mold, and an upper end of the bottom arc-shaped pillow bar is fixedly connected to the top layer of steel bars of the top plate.

[0009] Furthermore, a top arc-shaped cap reinforcement is arranged at the upper end of the foam core mold, and the lower end of the top arc-shaped cap reinforcement is fixedly connected to the bottom steel bars of the top plate.

[0010] Furthermore, the stirrups are provided with top reinforcing ribs to fix and connect the top layer of steel bars of the top plate.

[0011] As a preferred solution, the spacing between the multiple bamboo grate frames on the upper side of the foam core mold is 15 cm, and the spacing between the multiple bamboo grate frames on the lower side is 10 cm.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model intermittently places columnar foam core molds in the top plate of the box-type mechanism, and sets a longitudinal bamboo grate frame to closely fit the outer hoop reinforcement of the foam core mold to fix it, thereby improving the rigidity of the core mold. By setting up this hollow top plate, the deadweight of the top plate is reduced, the bearing pressure of the cavity top plate is increased, and the stability of the box-type concrete underground road is increased.

[0014] 2. The utility model reduces the amount of steel bars and concrete used, thereby reducing costs. Moreover, the span is large, and it is suitable for buildings with large spans and large spaces. The construction speed is fast and the cycle is shortened. The structure itself has good stability and has broad promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0016] Figure 1 A schematic diagram of the use position of the utility model.

[0017] Figure 2 for Figure 1 Middle AA section view.

[0018] The reference numerals in the accompanying drawings are:

[0019] 1-bottom steel bars of top plate, 2-bottom arc-shaped pillow bars, 3-foam core mold, 4-bamboo grate frame, 5-top arc-shaped cap bars, 6-top reinforcement bars, 7-top steel bars of top plate, 8-hoops. DETAILED DESCRIPTION

[0020] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0021] Example:

[0022] refer to Figure 1 and Figure 2This embodiment provides a large-volume box-type underground concrete top plate, which solves the problem that the underwater concrete measuring device is easily affected by the steel cage and has low accuracy when measuring the concrete height in the pouring hole. This embodiment provides a large-volume box-type underground concrete top plate, in which three foam core molds 3 are arranged across the empty space direction in the top plate, and longitudinal bamboo grate frames 4 are arranged on the outside of the foam core molds 3. Three bamboo grate frames 4 are arranged on the top and bottom, respectively, and stirrups 8 with a diameter of 12mm and a spacing of 1m are arranged on the outside of the bamboo grate frames 4 for fixing. In the top plate of the box-type mechanism, columnar foam core molds are placed intermittently, and longitudinal bamboo grate frames are arranged to be closely attached to the outer stirrups of the foam core molds to fix them, thereby improving the rigidity of the core molds. By setting up this hollow top plate, the dead weight of the top plate is reduced, the bearing pressure of the cavity top plate is increased, and the stability of the box-type concrete underground road is increased.

[0023] The bottom of the top plate is laid with the bottom steel bars 1, with a longitudinal spacing of 12 cm and a longitudinal spacing of 24 cm; the top of the top plate is laid with the top steel bars 7, with a longitudinal spacing of 12 cm and a longitudinal spacing of 24 cm.

[0024] The lower end of the foam core mold 3 is provided with a bottom arc-shaped pillow reinforcement 2, and the upper end of the bottom arc-shaped pillow reinforcement 2 is fixedly connected to the top plate top steel bar 7. The upper end of the foam core mold 3 is provided with a top arc-shaped cap reinforcement 5, and the lower end of the top arc-shaped cap reinforcement 5 is fixedly connected to the top plate bottom steel bar 1. The foam core mold 3 is fixed at both ends.

[0025] In order to improve the integrity of the stirrups and the upper and lower layers of steel bars, the present embodiment sets a top reinforcing rib 6 on the stirrup 8 to fix and connect the top layer of steel bars 7 of the top plate, and the top reinforcing rib 6 is arranged longitudinally with a spacing of 12 cm. A moderate-sized bamboo grate frame 4 is also used, the size of which is 1000mm*100mm*5mm. The spacing of the multiple bamboo grate frames 4 on the upper side of the foam core mold 3 is 15cm, and the spacing of the multiple bamboo grate frames 4 on the lower side is 10cm. The use of steel bars and concrete is reduced, thereby reducing costs. Moreover, the span is large, which is suitable for buildings with large spans and large spaces. The construction speed is fast and the cycle is shortened. The self-structure has good stability and has broad prospects for promotion.

[0026] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.

Claims

1. A large-volume box-type underground concrete top plate, characterized in that: A plurality of foam core molds (3) are arranged in the top plate across the empty space direction, a longitudinal bamboo grate frame (4) is arranged outside the foam core mold (3), and a plurality of stirrups (8) are arranged outside the bamboo grate frame (4) for fixing, a bottom arc-shaped pillow reinforcement (2) is arranged at the lower end of the foam core mold (3), and the upper end of the bottom arc-shaped pillow reinforcement (2) is fixedly connected to the top steel bar (7) of the top plate; a top arc-shaped cap reinforcement (5) is arranged at the upper end of the foam core mold (3), and the lower end of the top arc-shaped cap reinforcement (5) is fixedly connected to the bottom steel bar (1) of the top plate; and a top reinforcing rib (6) is arranged on the stirrup (8) for fixing the top steel bar (7) of the top plate.

2. A large-volume box-type underground concrete top slab according to claim 1, characterized in that: A bottom layer of top plate steel bars (1) is laid at the bottom of the top plate, and a top layer of top plate steel bars (7) is laid at the top of the top plate.

3. The large-volume box-type underground concrete top slab according to claim 1 is characterized in that: The spacing between the multiple bamboo grate frames (4) on the upper side of the foam core mold (3) is 15 cm, and the spacing between the multiple bamboo grate frames (4) on the lower side is 10 cm.

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