Large-span arch bridge annular underground continuous wall foundation in deep and thick covering layer area

Abstract

The invention provides a large-span arch bridge annular underground continuous wall foundation in a deep and thick covering layer area and belongs to the field of geotechnical engineering. An annularunderground continuous wall, a cap beam, a lining wall, a bottom plate, an arch base, a cover plate and a pile foundation are included; the annular underground continuous wall comprises I stage groovesegments and II stage groove segments; the I stage groove segments and the II stage groove segments are connected alternately to form a ring shape; the cap beam is arranged along the contour of the annular underground continuous wall and located on the top of the annular underground continuous wall; the lining wall is tightly attached to the inner side wall of the annular underground continuous wall; the bottom plate is of a flat plate structure and flatly laid in the annular underground continuous wall; the arch base is arranged on the upper end face of the bottom plate; the top of the coverplate is flush with the top face of the cap beam; and the pile foundation is located in the annular underground continuous wall. The large-span arch bridge annular underground continuous wall foundation in the deep and thick covering layer area has high anti-overturning performance and good horizontal and vertical bearing performance, and the construction difficulty and cost of a traditional large-span arch bridge and arch base foundation in the deep and thick covering layer area can be substantially reduced.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to an annular underground diaphragm wall foundation of a large-span arch bridge in a deep overburden area. Background technique [0002] In order to withstand the huge horizontal thrust and vertical load from the superstructure of long-span arch bridges, and to meet the stringent requirements for horizontal displacement and vertical displacement of the superstructure of long-span arch bridges, the foundations of traditional long-span arch bridges often choose bearing capacity and integrity. Good bedrock is used as the bearing layer, and open-cut foundations are often used as the foundation form. However, for areas with deep overburden layers, the bedrock layer is buried deeply, which greatly increases the difficulty and cost of foundation construction for long-span arch bridges. As a foundation form with three functions of retaining soil, seepage prevention and load bearing a...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem of difficulty in construction and high cost caused by the construction of long-span arch bridges in areas with deep overburden layers using bedrock as the supporting layer of the abutment foundation. Composite foundation of long-span arch bridge

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