Communication and connection construction method of newly-added underground excavation channel and existing station hall layer

Abstract

The invention discloses a communication and connection construction method of a newly-added underground excavation channel and an existing station hall layer. By means of the method, a side wall of the existing station hall layer is broken, and therefore the construction method adopted when the existing station hall layer and the newly-added underground excavation channel are in communication andconnection is achieved. In order to guarantee structure safety and stability, the side wall of the existing station hall layer is broken under the condition of erecting in the full house, the side wall of the existing station hall layer is cut in a rope saw cutting manner through partitioning step by step, and cut blocks are broken on the principle of achieving dismounting and supporting at the same time. By means of the adopted connection side wall breaking method, construction structure stability and construction safety are guaranteed from multiple angles, and the influence on existing raillines is reduced to the lowest degree.

Description

technical field [0001] The present invention relates to a connection and connection interface method for shallow-buried urban underground space, in particular to a connection and connection interface form between a newly added underground excavation channel and an existing station hall floor in a shallow-buried urban underground space, which belongs to the connection technology of urban rail transit field. Background technique [0002] With the development of the economy and the change of the form of the times, urban conflicts such as the poor operation ability of the existing subway and the congestion of the existing underground space broke out. The development and expansion of underground space is an effective measure to alleviate the bottleneck of urban development, thus triggering the expansion of the existing structure. need. The usual method used in construction is to build a new structure first, and then break down the side walls of the old structure at the junction ...

AI Technical Summary

Problems solved by technology

On the one hand, the release of stress when there is a structural breach in the construction link will lead to stress concentration at the breached opening and make it easy to lose stability; on the other hand, after the connection structure is completed, the stress of the new and old structures will be redistributed, and the connection part is still a weak part

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