Long-span and high-side-wall underground space building and excavation support method thereof

Abstract

The invention discloses a long-span and high-side-wall underground space building and an excavation support method thereof. The underground space building and the excavation support method solve the problems that the existing underground space building is large in driving face, complicated in construction technology, long in construction period and high in excavation support cost, and does not adapt to the deformation characteristic of a soft stratum. The long-span and high-side-wall underground space building comprises an underground space building body, wherein a plurality of boundary line prestressed anchor holes are formed at side wall boundary lines of the underground space building body; a plurality of boundary line outside prestressed anchor holes are formed on the outer sides of side wall boundary lines of the underground space building body; the boundary line prestressed anchor holes are communicated with the boundary line outside prestressed anchor holes by corresponding penetrating prestressed anchor holes; and the penetrating prestressed anchor holes are internally provided with penetrating pressured anchor rods or cables. According to the underground space building and the excavation support method, easy forming of small cavities during excavation in the soft stratum is utilized, first anchoring and then excavation are performed, and then the long-span and high-side-wall underground space building is excavated according to the prior art, so that the excavation support is simple, and the building is steady.

Description

technical field [0001] The invention relates to the field of excavation and support for underground buildings, in particular to a large-span and high-side wall underground space building and an excavation and support method thereof, which are mainly used for large-span and high-side-wall underground space buildings in weak rock formations under construction. Background technique [0002] In the 21st century, with the development of my country's national economy, the adjustment of national strategies, the needs of national defense construction and the development of urban infrastructure, the space structure of underground large-span high-side walls is gradually increasing, such as large-span pumped storage underground workshops, underground military storage, Air defense facilities, urban railway tunnels, etc., but the rocks are often weak in the areas where construction is required, and the conditions for forming holes are poor. Existing excavation and support technology, tha...

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Problems solved by technology

[0003] In order to overcome the problems of the existing large-span and high-side wall underground space excavation and support for large excavation surface, complex construction technology, long construction period, incompatibility with the deformation characteristics of weak rock formations, and high excavation and support costs, the present invention aims to To provide a large-span and high-side wall underground space building and its excavation and support method, it is easy to form a small cavern by excavating a small cavern in a weak rock stratum, and by first anchoring and then digging, that is, for a certain range of the top arch and high side wall After pre-reinforcing the weak rock strata, excavate the large-span and high-side wall underground space buildings according to the existing technology, the excavation support is simple, and the buildings are stable

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