Author(s)

YiChen Ouyang^1,2*, RuiRong Liang^1,2, BoBo Li^1,2, XiaoXia Zhao^1,2, ZhiCheng Bai^1,2

Affiliation(s)

¹China Construction Fourth Engineering Bureau Co., Ltd., Guangzhou 51000, Guangdong, China.

²China Construction Fourth Engineering Bureau Construction Investment Co., Ltd., Shanghai 200000, China.

Corresponding Author

YiChen Ouyang

ABSTRACT

This paper takes the wood-grain textured fair-faced concrete column-free spiral staircase project at the China Grand Canal Museum as an example, summarizing and presenting its one-time molding construction method. This method utilizes BIM high-precision modeling technology to accurately extract the spatial curve data of the spiral staircase, optimizing the formwork system layout and template splicing scheme to achieve digital construction and ensure high-precision results in a single pour. Furthermore, a steel-wood composite formwork system is employed, using high-strength steel keel support and finely crafted wooden templates for curved surface shaping, guaranteeing the accuracy of the spiral staircase's curves, improving construction efficiency, and ensuring structural stability. Finally, a one-time pouring process is used, employing a layered composite formwork combining pine wood grain panels and fair-faced wood template liners to accurately replicate the texture of natural wood, ensuring a delicate finish after demolding and avoiding the impact of subsequent repairs on the visual quality.

KEYWORDS

Wood-grain texture; Fair-faced concrete; Column-free spiral staircase; One-time molding

CITE THIS PAPER

YiChen Ouyang, RuiRong Liang, BoBo Li, XiaoXia Zhao, ZhiCheng Bai. High-precision construction techniques and applications for wood-grain textured exposed concrete column-free spiral staircases. Academic Journal of Architecture and Civil Engineering. 2026, 4(1): 1-7. DOI: https://doi.org/10.61784/ajace3015.

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