Prefabricated reinforced concrete panels are divided into three categories according to their cross-sectional forms. The following Zhongda Consulting and Bidding Teachers will give you answers for your reference.
Commonly used precast reinforced concrete panels are divided into three types according to their cross-sectional forms: solid slabs, channel slabs and hollow slabs. a) Solid flat plate The solid flat plate has smaller specifications, the span is generally about 1.5m, and the plate thickness is generally 60mm. Prefabricated solid flat panels are flat from top to bottom and are simple to make, but they have a heavy weight and poor sound insulation effect. Commonly used in corridors and floors of small rooms, bathrooms, and kitchens. b) Channel plate When the span size of the plate is large, in order to reduce the self-weight of the plate, the plate can be made into a channel plate according to the hand conditions of the plate. The trough plate is a prefabricated component with a combination of ribs and plates. That is, there are side ribs on both sides of the solid plate. The loads acting on the plate are borne by the side ribs. The plate width is 500~1200mm. It is a non-prestressed trough shape. The span length of the board is usually 3~6m. The plate rib height is 120~240mm and the plate thickness is only 30mm. The grooved board reduces the weight of the board, saves materials, and facilitates drilling holes in the board; however, the sound insulation effect is poor. When the trough-shaped plate is placed upright (ribs facing down), the bottom of the plate is uneven. When the trough-shaped plate is placed upside down (ribs facing up), structural processing needs to be carried out on the plate to make it flat, and the groove can be filled with lightweight materials. Thermal insulation and sound insulation. c) Hollow board Hollow board is also a prefabricated component with a combination of beams and plates. Its structural calculation theory is similar to that of trough board. The material consumption of the two is also similar, but the upper and lower surfaces of hollow board are flat, and the sound insulation effect is better than that of trough board. board, so it is a widely used form at present. The holes of the hollow plate are rectangular, square, round, oval, etc. Plate with circular holes has good rigidity and is easier to make, so it is widely used. According to the width of the board, the number of holes is single hole, double hole, triple hole, multi-hole, etc. At present, the spans of prestressed hollow slabs in my country can reach 6m, 6.6m, 7.2m, etc., and the thickness of the slabs is 120~300mm. Before installing the hollow slab, the C15 concrete short cylinder (i.e. plug) should be filled in the round hole at the end of the slab to prevent the end of the slab from being crushed.
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