Steel-concrete-ultrahigh performance concrete combined segment and construction method thereof

Abstract

The invention discloses a steel-concrete-ultrahigh-performance concrete combined segment and a construction method thereof. The steel-concrete-ultrahigh-performance concrete combined segment comprises an upper-layer ultrahigh-performance concrete plate, a lower-layer steel plate and a plurality of pieces of connecting profile steel arranged between the upper-layer ultrahigh-performance concrete plate and the lower-layer steel plate and arranged in the annular direction of the lower-layer steel plate; the connecting profile steel comprises side profile steel arranged on the two sides close to the length direction of the lower-layer steel plate, edge gaps are formed between the side profile steel and the edges of the two sides of the lower-layer steel plate and the upper-layer ultrahigh-performance concrete plate, and the edges of the two sides, in the length direction, of the upper-layer ultrahigh-performance concrete plate downwards extend into the edge gaps in the direction of the lower-layer steel plate; and the gap between the upper-layer ultrahigh-performance concrete plate and the lower-layer steel plate is divided into a plurality of cavities used for being filled with concrete through the connecting profile steel, and the tunnel segment further comprises concrete filled in the cavities. The combined tunnel segment has the advantages of being high in durability, high in material utilization efficiency, easy to assemble and construct and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of subway and highway tunnel construction, and in particular relates to a steel-concrete-ultra-high-performance concrete composite segment and a construction method thereof. Background technique [0002] The level of construction of underground tunnels such as subway tunnels, underground lanes and underground walkways is an important indicator of a country's level of technology and modernization. With its advantages of fast construction speed, no impact on ground traffic and high degree of industrialization, shield tunnels have been widely used in the construction of subway tunnels in my country, but shallow buried tunnels such as underground driveways, underground walkways and comprehensive underground pipe galleries are still mainly used Cast-in-place construction. The construction efficiency of underground cast-in-place structures is low, the occupation of urban space is long, the construction quality con...

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Problems solved by technology

Many of the above unfavorable factors and their combined effects lead to the corrosion of steel bars and the deterioration of concrete performance in the underground environment are significantly higher than that of the above-ground structure. In addition, the maintenance and repair of the underground structure is difficult, which makes the structure face severe durability problems.

In order to ensure the durability of the underground tunnel structure, the section size and reinforcement of the segment are usually controlled by the maximum crack width during the use stage. There are common problems such as large section size, high reinforcement ratio, and low material utilization efficiency. It is especially prominent in special-shaped tunnels such as rectangles and quasi-rectangular tunnels where the moment acts

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