A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental Research of Ultra High Performance Concrete in Supersized Rectangle Pipe Jacking Project
In recent years, supersized rectangle pipe-jacking method has been widely used and the monolithic pre-cast pipe tube is extensively adopted. However, the application of supersized rectangle pipe-jacking method in the urban area is severely limited, because of the oversized volume and weight as well as the difficulty of transportation and lifting. Therefore, it is imperative to explore the new structure of the supersized rectangular pipe tube. This paper introduces two-half-assembled precast concrete tube to reduce the aforementioned difficulties. Depending on the excellent early-strength performance, mechanical performance, and durability performance of ultra-high performance concrete (UHPC), quick connection of the wet-joint can be achieved on-site and maintenance only needs 3 days before propulsion operation. The mechanical and waterproofing performance of the interface between UHPC and PC are explored by prototype test. The main conclusions are summarized as follows: (1) the bearing capacity of the wet-joint is much higher than the actual need after 3-day maintenance; (2) the waterproofing performance of the interface by the laboratory test meets the design requirements; (3) the interface of the prototype test has barely waterproofing performance; (4) after special treatment on the interface, waterproofing performance is improved and meets the demands, which it is successfully applied to the actual project.
Experimental Research of Ultra High Performance Concrete in Supersized Rectangle Pipe Jacking Project
In recent years, supersized rectangle pipe-jacking method has been widely used and the monolithic pre-cast pipe tube is extensively adopted. However, the application of supersized rectangle pipe-jacking method in the urban area is severely limited, because of the oversized volume and weight as well as the difficulty of transportation and lifting. Therefore, it is imperative to explore the new structure of the supersized rectangular pipe tube. This paper introduces two-half-assembled precast concrete tube to reduce the aforementioned difficulties. Depending on the excellent early-strength performance, mechanical performance, and durability performance of ultra-high performance concrete (UHPC), quick connection of the wet-joint can be achieved on-site and maintenance only needs 3 days before propulsion operation. The mechanical and waterproofing performance of the interface between UHPC and PC are explored by prototype test. The main conclusions are summarized as follows: (1) the bearing capacity of the wet-joint is much higher than the actual need after 3-day maintenance; (2) the waterproofing performance of the interface by the laboratory test meets the design requirements; (3) the interface of the prototype test has barely waterproofing performance; (4) after special treatment on the interface, waterproofing performance is improved and meets the demands, which it is successfully applied to the actual project.
Experimental Research of Ultra High Performance Concrete in Supersized Rectangle Pipe Jacking Project
Mechan. Machine Science
Li, Shaofan (editor) / Fang, Tao (author) / Guan, Linxing (author) / Sun, Wei (author)
International Conference on Computational & Experimental Engineering and Sciences ; 2023 ; Shenzhen, China
2023-12-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
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