Shed-frame method for shallowly burying large-sized underground structure construction

Abstract

The invention relates to a shed-frame method for shallowly burying a large-sized underground structure construction. A construction principle is as follows: an envelope enclosure is adopted for retaining soil and water and resisting lateral deformation; a large-diameter pipe shed is arranged to bear the load of road surfaces and stratums and protecting underground pipelines; strip foundation construction of a center pillar in a main structure is carried out in a small pilot tunnel which is excavated with a subsurface excavation method; and under the protection of a top pipe shed frame, main structure construction is carried out with a cover-and-excavation half-top-town half-bottom-up method, and the center pillar, side walls, a center plate and a top plate which are pre-constructed well are utilized for providing vertical and horizontal support systems in an excavation space. The invention aims at providing a new method for shallowly burying the large-sized underground structure construction under an urban road; and the method is reasonable and feasible in technique and strong in operability, the quality of the main structure is guaranteed easily, construction is safe and rapid, the influences on ground transportation and the dismantlement and change to underground pipelines are reduced, and the comprehensive benefits are remarkable, therefore the shed-frame method has an important engineering application value and development prospect.

Description

Technical field [0001] The invention relates to a scaffolding method for the construction of shallow-buried large-scale underground structures, which is suitable for the safe and rapid construction of large-scale underground structures under urban roads, and reduces the impact on surface traffic and the dismantling and modification of underground pipelines. Background technique [0002] At present, the construction of urban underground engineering mainly based on underground railways usually adopts open-cut method, under-cut method, cover-cut method and overlay method. These methods are mature in technology, but each has its own characteristics and has certain scope and conditions of application. The open-cut method requires a large construction site. If large underground structures such as subway stations are located under urban roads, part or all of the roads will be occupied for a long time, which will have a great impact on traffic, and the underground pipelines under the roa...

AI Technical Summary

Problems solved by technology

The underground excavation method has the least impact on ground traffic, but requires a large buried depth, good geological conditions, and low groundwater levels. At the same time, it has high cost, high safety risks, and slow construction speed

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