首页|Recent Construction Technology Innovations and Practices for Large-Span Arch Bridges in China

Recent Construction Technology Innovations and Practices for Large-Span Arch Bridges in China

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Arch bridges provide significant technical and economic benefits under suitable conditions.In particular,concrete-filled steel tubular(CFST)arch bridges and steel-reinforced concrete(SRC)arch bridges are two types of arch bridges that have gained great economic competitiveness and span growth potential due to advancements in construction technology,engineering materials,and construction equipment over the past 30 years.Under the leadership of the author,two record-breaking arch bridges-that is,the Pingnan Third Bridge(a CFST arch bridge),with a span of 560 m,and the Tian'e Longtan Bridge(an SRC arch bridge),with a span of 600 m-have been built in the past five years,embodying great techno-logical breakthroughs in the construction of these two types of arch bridges.This paper takes these two arch bridges as examples to systematically summarize the latest technological innovations and practices in the construction of CFST arch bridges and SRC arch bridges in China.The technological innovations of CFST arch bridges include cable-stayed fastening-hanging cantilevered assembly methods,new in-tube concrete materials,in-tube concrete pouring techniques,a novel thrust abutment foundation for non-rocky terrain,and measures to reduce the quantity of temporary facilities.The technological innovations of SRC arch bridges involve arch skeleton stiffness selection,the development of encasing concrete mate-rials,encasing concrete pouring,arch rib stress mitigation,and longitudinal reinforcement optimization.To conclude,future research focuses and development directions for these two types of arch bridges are proposed.

Concrete-filled steel tubular arch bridgesSteel-reinforced concrete arch bridgesCable-stayed fastening-hanging cantilevered assemblyNon-rocky thrust abutment foundationStiff skeletonEncasing concrete pouringLongitudinal reinforcement optimization

Jielian Zheng

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School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China

Guangxi Key Research and Development Plan Program

AB22036007

2024

10.1016/j.eng.2024.05.019

工程(英文)

工程(英文)

CSTPCDEI
ISSN：2095-8099
年,卷(期)：2024.41(10)