Vertical expanding construction method and structure of underground space

Abstract

The invention provides a vertical expanding construction method and structure of an underground space. A reinforcing soil body is arranged in an expansion area, namely below a to-be-expanded structure, and is tightly connected with an original enclosure of an original underground structure, a new enclosure is arranged on the inner side of the original enclosure, grout is injected into a gap between the new enclosure and the original enclosure to form an enclosure combination, a locking beam is arranged at the top of the combination of the new enclosure and the original enclosure, and a new stand column extends downwards to a position below the reinforcing soil body and extends upwards to a roof of the original underground structure, so that the new enclosure and the original enclosure arestably supported, the whole construction process is completed in the original underground structure and an expanded structure, vertical expanding construction can be achieved without affecting the service function of an existing building, an underground facility space is enlarged under the condition that the influence on the environment is minimized, and the increasing usage requirements of residents are met. In addition, the original enclosure and an original structural beam plate can be used repeatedly to the maximum extent, so that the expanding construction cost is low.

Description

technical field [0001] The invention relates to the field of underground space construction, in particular to a construction method and structure for vertical extension of an underground space. Background technique [0002] With the increasing population of central cities, ground buildings are far from meeting the daily needs of residents, and commercial, civil and municipal facilities such as shopping malls and subway stations are gradually developing deeper underground. However, due to factors such as the estimated flow of people and capital costs, the underground building space is often not considered for subsequent use during the initial construction, and the space design is too small to meet the use needs after many years. [0003] There are two common solutions, one is demolition and reconstruction, and the other is horizontal expansion. The cost of demolition and reconstruction is high, the construction period is long, and the original function of use is lost during ...

AI Technical Summary

Problems solved by technology

The cost of demolition and reconstruction is high, the construction period is long, and the original function of use is lost during the reconstruction stage

Regardless of whether the horizontal extension is adopted by open-cut or underground-excavation methods, it is technically difficult to deal with the connection between the existing structure and the extended structure, and the construction risk is high.

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