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Crack control at the early cage and the long-term and the promotion of appearance quality should be considered simultaneously for the design of cast in situ tunnel sidewall clean water concrete at open section. Based on the crack resistance evaluation and design of concrete by the multi-field coupling mechanism in advance, the raw materials and concrete mix proportion were optimized, and the temperature rise inhibited and slight expansion anti-crack agent and rheological modified agent were adopted to regulate the workability, temperature and deformation of concrete, and then the clean water concrete with high crack-resistance which meet the requirements was prepared. [ABSTRACT FROM AUTHOR]