High altitude reinforced concrete corridor structure triangle steel tube cantilever formwork construction technology

Abstract

The invention relates to a high altitude reinforced concrete corridor structure triangle steel tube cantilever formwork construction technology suitable for two adjacent high buildings which are less than 120m in height and less than or equal to 12m apart. The high altitude reinforced concrete corridor structure triangle steel tube cantilever formwork construction technology temporarily changes a component stress state of a corridor structure, changes a cantilever beam into a continuous beam, changes a cantilever bracket into an arc structure, improves early bearing capacity of the corridor structure, achieves a continuous construction purpose, reduces technical downtime, and simultaneously uses a common steel tube scaffold construction method and common tools, conveniently builds and dismantles a steel tube scaffold, and is strong in applicability, and clear and definite in rod piece stress. A variety of materials can be dispatched and used, and engineering cost can be reduced. The high altitude reinforced concrete corridor structure triangle steel tube cantilever formwork construction technology includes the following specific steps: building a corridor structure formwork support frame operation platform; constructing a corridor structure; chipping away corridor expansion joint beam concrete, and cutting off an expansion joint reinforced rib; dismantling a corridor structure formwork; dismantling the corridor structure formwork support frame operation platform.

Description

technical field [0001] The invention relates to a method suitable for the construction of a high-altitude reinforced concrete corridor structure with a distance between two adjacent high-rises below 120m and a distance of ≤12m. Background technique [0002] Between the heights of two adjacent high-rise buildings, due to the needs of function, architectural shape and structure, expansion joints are designed to connect the corridor structures (symmetrical) protruding from the two high-rise buildings. In the construction of high-altitude corridor structure, the first formwork support is to use steel pipe fasteners to erect the floor load-bearing support. However, this solution requires a large investment of steel pipe fasteners at one time, and due to the high erection height (generally more than 50 meters) and the large aspect ratio of the bent frame 1. The distance between the vertical poles is small and the construction is difficult, so it is generally not used; the second ...

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Problems solved by technology

In the construction of high-altitude corridor structure, the first formwork support is to use steel pipe fasteners to erect the floor load-bearing support. However, this solution requires a large amount of investment in steel pipe fasteners at one time, and due to the high erection height (generally more than 50 meters) and the large aspect ratio of the bent frame 1. The distance between the vertical poles is small and the construction is difficult, so it is generally not used; the second is to use the steel truss as the load-bearing frame, but the one-time cost of the steel is relatively large, and the requirements for processing, installation quality, and hoisting machinery are high, and quality control is relatively difficult. , and after the construction of the upper corridor is completed, it is difficult to dismantle the steel trusses below, and the turnover utilization rate of the steel trusses is low after dismantling; The stress state of the lower cantilever beam can improve the bearing capacity of the corridor structure, reduce the pressure of the cantilever component structure on the formwork construction operation platform of the corridor, and increase the safety factor of the formwork support. Good results have been achieved in the construction of the corridor structure

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