Research on Construction Technology of Self-Compacting Composite Columns with Steel-Reinforced Concrete Based on Super-Slender Steel Tube Members

DOI

10.2991/978-94-6463-847-9_13How to use a DOI?

Keywords

Extra-large slenderness ratio steel tubular members; Steel reinforced concrete composite columns; Self-compacting concrete; Construction technology; Concrete segregation control

Abstract

With the development of large-scale public buildings towards long-span, high-load-bearing, and complex structural forms, steel-reinforced concrete composite structures have been widely adopted due to their superior mechanical properties. However, concrete pouring in super-slender steel tube members (slenderness ratio > 20) often leads to issues such as segregation and insufficient compactness, severely affecting structural durability. This paper, based on the Western (Chongqing) Science City Convention Center project, systematically investigates key construction challenges in inclined steel columns (maximum inclination angle of 40°) and self-compacting concrete composite structures, including precise hoisting of steel columns, segregation prevention in self-compacting concrete, and optimization of joint connections. Through field experiments, the “segmented pre-assembly + dual-crane collaborative hoisting” technique combined with real-time total station monitoring achieved an average installation deviation of 2.3mm (n = 27 columns), with a maximum deviation of 2.8mm and a pass rate of 100%. A conduit fixation device and layered free-fall pouring method were developed, reducing the concrete segregation rate from 15.2% to 6.8% (tested in 12 pouring batches)and increasing compactness to 98.5% as verified by ultrasonic testing. The “reinforcement coupler + flange plate collaborative design” improved joint construction efficiency by 32% and increased the rebar binding qualification rate from 85% to 98%. The research findings have been successfully applied in practical engineering, resolving construction challenges under complex geological conditions and tight schedules, providing systematic technical references for similar projects.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Junke Li
AU  - Huibin Wang
AU  - Bo Han
AU  - Chaoqun Cai
AU  - Wei Chai
AU  - Chunlong Qiu
PY  - 2025
DA  - 2025/09/23
TI  - Research on Construction Technology of Self-Compacting Composite Columns with Steel-Reinforced Concrete Based on Super-Slender Steel Tube Members
BT  - Proceedings of the 2025 6th International Conference on Urban Construction and Management Engineering (ICUCME 2025)
PB  - Atlantis Press
SP  - 115
EP  - 125
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-847-9_13
DO  - 10.2991/978-94-6463-847-9_13
ID  - Li2025
ER  -