Research on Construction Technology of Large Diameter Pile-wall Combined Anchorage Foundation
In the paper,relying on the Cangrong Xunjiang Bridge project which for the first time in China adopting the combination of large-diameter piles and diaphragm walls as the permanent load-bearing structure of the anchorage foundation,key construction technologies are innovated and applied.The construction technology,hole accuracy control measures,and foundation quality inspection of pile wall combined anchorage foundation are studied.By adopting the construction process of first phase pile foundation and second phase groove,combined with precision control measures such as positioning,graded drilling,drilling tool modification,and measurement and timely correction,the integrity between the pile walls is ensured,and the mechanical performance of the pile wall composite foundation structure is fully utilized.At the same time,new equipment and systems are adopted which significantly improves construction efficiency,reduces construction costs,and enhances safety monitoring and risk control capabilities during the construction process.This study not only avoids the large-scale excavation of soil and gravel and concrete backfilling in traditional anchor foundations,achieving carbon reduction goals,but also provides useful exploration and rich construction experience for similar projects in the future,with wide promotion and application value.
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维普
