Segmented dismantling construction method of large-span beam string structure

Abstract

The invention discloses a segmental dismantling construction method for a large-span beam string structure. The segmental dismantling construction method comprises the following steps of arranging a plurality of breaking points on a beam string structure, and arranging supporting jig frames for supporting the beam string structure at the breaking points; dismantling secondary components, irrelevant to a transverse supporting frame system for keeping the beam string structure, on the beam string structure; cutting the beam string structure at the breaking points to form multiple sections of beam string units; disconnecting the beam string structure units from building vertical force bearing components, hoisting the beam string structure units to the ground and then disassembling the beam string structure units; and dismantling supporting jig frames. The segmented dismantling construction method is suitable for beam string structures of various space models, the conversion principle of astructure stress system in the dismantling process is clear, no special requirement is needed for a field site, safety is good, implementation performance is high, the influence on the surrounding environment is smaller, construction operation is easy, investment of large hoisting equipment and the number of supporting measures is reduced,, the construction cost is saved, and the construction cost is lower.

Description

technical field [0001] The invention relates to the technical field of building structures, in particular to a construction method for segmental dismantling of a large-span string beam structure. Background technique [0002] Because of its light weight and reasonable stress, the beam structure is widely used in the roof system of large-span space structures. However, with the continuous development of social economy, more and more existing buildings can no longer meet the rapidly increasing demand for use, and need to be renovated or rebuilt according to the needs of the new era. However, there are many dangers in the process of demolition of large-span string beam structures, and there are no perfect demolition technical documents and construction techniques at this stage, so high requirements are put forward for demolition contractors. [0003] At present, there is no precedent for the dismantling of the string beam structure. The existing relevant large-span steel struc...

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the high site requirements, poor construction safety, poor implementability, large impact on the surrounding environment, complex construction operation and high construction cost in the prior art string beam structure demolition method defects, thus providing a segmental demolition construction method for long-span string beam structures

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