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Super-span steel skew arch construction method

A construction method and technology of inclined arch, which are applied in the direction of arch structure, building component, dome roof structure, etc., can solve the problems of high construction difficulty, high assembly difficulty and high hoisting height.

Active Publication Date: 2007-06-13
CHINA CONSTR EIGHT ENG DIV CORP LTD
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Problems solved by technology

[0002] Super-long-span steel inclined arches often appear in the architectural design of large-scale public stadiums. This kind of super-long-span steel inclined arches has brought many difficulties to our construction, mainly as follows: A. The height is high, and the installation accuracy is affected by the site environment, temperature changes, etc., and the construction is very difficult; B. The main arch is supported by a temporary support system during installation, and the structural system is gradually converted during the unloading process. The internal force of the rod and the temporary support The force changes and the working conditions are complicated; C. The main arch node is large in size, heavy in weight, with a large number of branch pipes, various spatial angles, difficult spatial positioning, and difficult assembly

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Embodiment Construction

[0015] The specific implementation of the invention will be described in further detail below with reference to the drawings and embodiments. The two main arches with a span of 372m in the north-south direction of the main stadium of the Nanjing Olympic Sports Center have a large span, heavy weight, and a single arch weighing 1606t. The highest point of the vault is 65m high. The main arch is a spatial structure tube truss with an arc length of up to 429.26m, its section is triangular, with three main chords arranged at the midpoint of the three vertices and the base of the oblique triangle. The angle between the base of the triangular section and the ground is 45°. In view of construction problems such as large span and heavy weight, the steel arch is divided into 21 structural units during construction. The main arch is assembled by horizontal assembly method. After the assembly is completed, it is turned over before hoisting to facilitate the assembly and ensure the accuracy of...

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Abstract

The invention discloses super span steel skew arch construction method. Its feature is that it adopts molding bed support sectionalizing installation method which includes the following steps: dividing the super span steel skew arch into twenty one construction units; assembling each of them by horizontal type assembling method; laying off and locating supporting molding bed by total stations instrument; installing supporting molding bed; orderly installing the 1-4, 18-21 sections steel skew arch in roof covering, the 5-10, 12-17 sections out roof covering, the eleventh healing section in roof covering; removing the supporting molding bed. The invention can eliminate installing accumulative error, increase insurance coefficient for whole project to ensure steel skew arch healing successful at a time. The method can be used in large scale hall super span steel skew arch construction.

Description

Technical field [0001] The invention belongs to the technical field of building construction steel structures, in particular to the field of super-large-span steel inclined arch construction methods. Background technique [0002] Super-span steel inclined arches mostly appear in the architectural design of large public stadiums. This kind of super-span steel inclined arches brings many problems to our construction. The main problems are as follows: A. Large section weight and operating radius of the main arch, hoisting High height, the installation accuracy is affected by the site environment, temperature changes and other aspects, the construction is very difficult; B. The main arch is supported by the temporary support system during the installation, and the structural system is gradually changed during the unloading process. The internal force of the rods and the temporary support The force changes and the working conditions are complex; C. The main arch node is large in size,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/32
Inventor 蒋振彦杨中源全有维
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD
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