Uhpc-based prefabricated formwork-removal-free steel bar truss floor support plate and use method

Abstract

The invention relates to an uhpc-based prefabricated formwork-removal-free steel bar truss floor support plate. The floor support plate is composed of uhpc bottom formworks, steel bar trusses, steel bar truss uhpc bonding belts and steel bar truss uhpc anchoring blocks, the uhpc bottom formworks are formed by pouring uhpc, and bottom formwork connecting structures are formed on the edges of the uhpc bottom formworks and used for connecting the two adjacent uhpc bottom formworks; and the steel bar trusses are arranged on the uhpc bottom formworks and connected with the uhpc bottom formworks through the steel bar truss uhpc bonding belts and the steel bar truss uhpc anchoring blocks to form a whole. According to the formwork-removal-free steel bar truss floor support plate, the material durability is good, the using amount is low, and the structural stress performance and the anti-seismic performance of a fabricated floor slab are achieved with low engineering cost. The floor support plate is low in resource and energy consumption, environment-friendly in industrialized production, high in construction speed, simple in connection, convenient and fast to construct, light in component weight and convenient to transport, hoist and mount, can be widely applied to low multi-story, high-rise and super high-rise buildings of various residences, offices, hotels, business and the like, and is a high-quality fabricated floor slab.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a UHPC-based prefabricated formwork-free reinforced truss floor deck and a method for using it. Background technique [0002] The formwork-free floor deck is an important structure in the field of building structure technology, especially in the field of prefabricated buildings. In the prior art, the formwork-free floor deck mainly includes reinforced concrete laminated panels, reinforced truss fixed-form floor decks, and reinforced truss floor decks. Forms such as bearing plates, but the current structure has the following defects: [0003] (1) Reinforced concrete laminated slab: The laminated slab is generally at least 6cm prefabricated + 7cm cast-in-place, with a thickness of 130mm, which is heavy and wastes materials. Moreover, due to the heavy weight of the prefabricated part, it is difficult to transport and hoist, and the cost is much higher than that of cast-i...

AI Technical Summary

Problems solved by technology

However, in the force analysis of the floor, the solid form does not bear the load, which has the disadvantage of wasting materials and space; and because the formwork is not removed, the thickness of the floor is greater than that of the cast-in-place concrete floor

[0005](3) Reinforced truss floor deck: the bottom formwork is a thin steel plate. After the construction, the bottom formwork should be removed or the ceiling should be installed, which increases the construction process and is easy to install Rust spots are left on the bottom of the slab, and the cost is also higher than that of cast-in-place reinforced concrete slabs

[0006] Although the existing patent technical literature has carried out related improvements, there are still many defects, resulting in insufficient strength, technology or cost in actual engineering applications. As expected, for example, the patent application CN111851829A published earlier discloses an assembled anti-cracking and non-demolition formwork, a floor deck and a cast-in-place non-demolition formwork floor. A formwork-free reinforced truss floor deck with a high-strength fiber cement board as the base form. Although it pays attention to the strength of the plate, it uses a high-strength fiber cement pressure plate pressed by a heavy-duty press as the base form, and uses embedded parts. The steel bar truss is connected with the cement pressure plate; the authorized utility model patent CN211572182U discloses a non-demolition-free decorative steel truss floor deck, which solves the existing demolition-free steel bar truss floor deck bottom mold and truss in the prior art For the technical problem of unstable fixation, embedded parts are also used, and the bottom mold is made of phosphogypsum, calcium silicate or gypsum casting

[0007] It can be seen that the above-mentioned patent documents focus on the material selection and strength of the bottom form, the connection process and connection strength between the bottom form and the steel truss, and the connection between the bottom form and the main structure of the floor slab. There are still many deficiencies in the synergy among them, which directly leads to the difficulty of meeting the needs of the construction project in terms of strength, force, production cost, and complexity of the construction process of the entire floor.

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