Formwork support adjustment parts and structural system of light steel support formwork for special-shaped cave construction

Abstract

The invention discloses a formwork supporting adjustment part and a special-shaped hole construction light steel supporting formwork structure system, and belongs to the field of architecture. The formwork supporting adjustment part comprises a plurality of fixing screws, an outer steel tube and angle steel provided with a plurality of sets of first bolt holes on both sides; the outer steel tube is located in the angle steel, and second threaded hole matched with first threaded holes are formed in the outer steel tube; the outer steel tube sleeves an inner steel tube, and the inner steel tubeis provided with third bolt holes; the fixing screws sequentially penetrate through the first bolt holes, second bolt holes and the third bolt holes; and an adjustment mechanism with adjustable lengthis arranged at the end, extending out of the outer steel tube, of the inner steel tube, and the adjustment mechanism is connected to profile steel. The special-shaped hole construction light steel supporting formwork structure system comprises a structural skeleton, and the formwork supporting adjustment parts are installed on the left and right sides and the top surface of the structural skeleton. The formwork supporting adjustment parts reduce the construction difficulty of setting up a special-shaped concrete formwork, so that a gap between the structural skeleton and the formwork can be adjusted without changing the length of a structural skeleton beam in real time according to the hole size.

Description

technical field [0001] The invention relates to the field of construction, in particular to a formwork support regulator and a light steel support formwork structural system for special-shaped cave construction. Background technique [0002] In the construction of the skeleton concrete engineering structure of the cave body, such as subways, underground pipe galleries and wind tunnel laboratories, the cross-section changes greatly, and the constructed concrete cave body has a large cross-sectional size, the clear width in the horizontal direction and the clear height in the vertical direction Both are more than 20 meters long, and belong to special-shaped concrete structure. The entire length of the inner cavity shrinks gradually, and each surface shrinks in a trapezoidal state along the longitudinal direction. Due to the huge self-weight of the concrete, the construction precision of the fair-faced concrete on the inner wall of the special-shaped wind tunnel is extremely hi...

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Problems solved by technology

[0003] The formwork construction is carried out using the traditional solid-web steel support method. In order to improve the support rigidity, the weight of a single steel support rod will be very heavy, and it is difficult to use small equipment or manual installation and removal.

Although the concrete cave can be constructed in sections, in order to ensure the construction progress and molding quality of the cave, the length of the construction section is still about 20 meters, and the poured and formed cave is in a closed state. It is feasible to lift the internal support out of the machine The reliability is very low, and due to the large tonnage, it is extremely difficult to implement the corresponding demolition technology adopted during the demolition, and it is also difficult to control the accuracy of hoisting and installation with equipment

Moreover, due to the large cross-section changes in the cave, the size of the support rods and formwork is various, the reuse rate is extremely low, the overall steel consumption is large, and the cost is high

After the concrete reaches its age, when the internal support system is removed, if mechanical removal is used, dragging the heavy tonnage support members will easily cause surface scratches on the inner wall of the cave, and the repair cost will be high

[0004] Chinese patent CN205894656 discloses a steel plate rib keel wooden formwork system for irregular curved surface fair-faced concrete, which can be used in irregular curved surface concrete construction, especially suitable for the construction of special-shaped clear-faced concrete structures with high quality requirements. Customization can achieve effective support for special-shaped cast-in-place concrete, and the steel plate ribs are dense, which can meet the rigidity requirements for the support; but if it is used in an irregular cavity structure with a large amount of engineering, it will make a large amount of materials, and the wooden formwork is dry. Humidity changes will lead to changes in mechanical properties, and the properties of wood along the grain and across the grain are very different, and the mechanical stability is not as good as steel molds. The utilization rate is low, which will cause material waste and increase the cost, and the construction speed is also slow. A large amount of processing is required to make wooden formwork, resulting in errors in the component processing stage, and a large number of popularization and application is limited.

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