Preloading structural part for high and large formwork support system

Abstract

Aiming at the technical problems of using sandbags or concrete blocks for surcharge preload detection, the present invention provides a surcharge preload structural member for tall formwork support systems, including two parts: a brick pier assembly and a preload load assembly; The pier assembly is composed of a first brick pier and a second brick pier; a first plastering layer is provided on the top of the first brick pier; a second plastering layer is provided on the top of the second brick pier; The top surface of the first smoothing layer is level with the top surface of the second smoothing layer; the preloaded load components are composed of preloaded load units, and the preloaded load components are composed of 2 to 10 preloaded load units arranged horizontally; The compression load components are stacked layer by layer on the top of the brick pier components, and the top of the brick pier components is paved with 2 to 20 layers of preload load components. The beneficial technical effects of the invention are: the product can obtain a larger load per unit area at a lower stacking height, thereby reducing the height of the pre-compressed stack carrier and the hoisting workload of the pre-compressed stacked load, and has high safety.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a surcharged preloaded structural member used for a tall formwork support system. Background technique [0002] With the continuous development of social economy, architectural design is constantly developing towards large span and large space, and the design and application of cast-in-situ beams and slabs with super large cross-section and super long span are becoming more and more frequent. For the formwork support system of reinforced concrete beams and slabs with large cross-sections during construction, in order to verify the strength, stiffness and stability of the formwork support system and eliminate the adverse effects of elastic and plastic deformation of the support system and foundation, it is often necessary to pour concrete The formwork support system of the reinforced concrete beam slab is preloaded and preloaded to ensure the safety and stability o...

AI Technical Summary

Problems solved by technology

Manual filling, lifting, loading and unloading of hundreds of tons of sandbags is required, the labor intensity is high, and the load value must be strictly controlled, which consumes a lot of machinery and manpower;

[0005] 2. Prolong the construction period

The affected construction period is 7 days or even longer;

[0006] 3. The control of preloading data is inaccurate, and overloading is likely to occur in rainy days, resulting in the collapse of the formwork support system of cast-in-place beams and slabs

The weight of the preloaded load with sandbags cannot be precisely controlled, especially in case of construction in rainy days, the rainwater poured into the sandbags will cause the accumulation of preloaded load to increase, and in severe cases, the support system will easily collapse and cause major safety accidents;

[0007] 4. The stacking height is too high to ensure the stability of the stacking carrier

Since the specific gravity of reinforced concrete is about 2.5 tons / m 3 , while the specific gravity of the sandbag is 1.6 tons / m 3 , and the preload generally needs to be overloaded by 1.2 times the preload. If the height of the beam section is 3.0m, then the height of the piled sand bag should reach: 3.0*(2.5 / 1.6)*1.2=5.625m, so close to the 6m high Sandbags are difficult to ensure the safety and stability of the accumulation body, and protective measures need to be taken to increase safety risks and investment;

[0008] 5. Using prefabricated concrete blocks as the load, lifting the prefabricated concrete blocks by crane to the upper part of the formwork support system for preloading can solve the above problems, but it is difficult to obtain materials for the prefabricated concrete blocks, and the transportation cost increases. If the precast concrete blocks are poured on site will be wasted again

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