Bolt ball welding ball mixed node large span cantilever grid structure construction method

Abstract

The invention provides a bolt ball welding ball mixed node large span cantilever grid structure construction method. The method comprises the steps that 1 a bolt ball welding ball mixed node space grid cell, namely the size and structure of a middle-size cell grid are determined according to the design; 2 a ground assembly moulding bed is arranged; 3 ground assembling is conducted on the middle-size cell grid; 4 coating and numbering are conducted on the middle-size cell grid; 5 a lifting point of the middle-size cell grid is determined and support profile steel is added; 6 a steel wire rope used for lifting and a chain block are arranged, and trying of lifting is conducted; 7 the middle-size cell grid is lifted and installed. The construction period can be greatly shortened, the using amount of construction revolving materials is reduced, the construction efficiency is improved, the safe hidden trouble brought by high altitude construction of constructors can be reduced at the same time, and meanwhile the special requirements on loading, span, forms and the like of a large-scale building grid structure can be met conveniently.

Description

technical field [0001] The invention relates to the technical field of grid structure construction for tall buildings, in particular to a construction method for a large-span cantilevered spatial grid structure with bolt ball welded ball mixed joints. Background technique [0002] With the development of society, large buildings such as airport terminals, stadiums, and exhibition halls are increasing, and the tops of large buildings usually need to be supported by large-span cantilevered space grid structures. At present, the span and volume of buildings are constantly increasing, and the shape of buildings is constantly pursuing novelty and beauty, which makes the form of grid structure more and more complicated. Usually, the large-span cantilever space grid structure is composed of a large number of bolt balls and connecting rods between the bolt balls; the construction method generally adopts the method of assembly by a large number of construction workers on the high-alt...

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Problems solved by technology

However, due to the functional requirements of some large buildings, it is often necessary to set up maintenance curbs on the grid structure, arrange air-conditioning and fire-fighting pipes, or centrally hang them, which requires that the bolt ball nodes at the corresponding positions must be considered by increasing the bolt ball diameter and thickening. Connecting rods to increase the load capacity is neither economical nor beautiful, and the construction is difficult; in addition, the construction method of assembling on the high-altitude construction operation platform requires a lot of manpower and material resources to build the operation platform, and the construction efficiency is low. The construction period is longer, the construction cost is greatly increased, and a large number of people working at heights are prone to safety accidents

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