Process of providing an elongate underground cavity

Details Process of providing an elongate underground cavity Process of providing an elongate underground cavity

1992-04-28

1993-04-06

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405138, 4051502, 405132, E21D 900

Patent

active

051998173

ABSTRACT:
In the provision of elongate underground cavities having a large volume are to be provided, particularly in the construction of underground railroad stations having at least two stories, it is desired to avoid a need for excavating an open pit and to minimize the handling of material. This is accomplished in that the cavity is excavated and lined in a two consecutive stages. In the first stage, two laterally spaced apart galleries are driven in the longitudinal direction of the cavity by a mining technique in the region of a top segment of the desired cavity and are formed each with an outer side face, which constitutes a portion of a side face of said top segment. Only one of said galleries is driven at any given time in any given cross-section of said top segment. Each of said galleries is provided on said outer side face with a supporting permanent first lining. The ground between said two galleries is removed to complete the excavation of said top segment. Said first linings are supplemented by an additional permanent lining to form a structural vault. In the second stage the bottom segment is excavated under the cover of the lining of said top segment.

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patent: 4929123 (1990-05-01), Lunardi
patent: 4976290 (1990-12-01), Gelin et al.

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