LAUSR

ABSTRACT Guo, C.; Han, K.; Shi, L., and Cui, M., 2018. Superiority analysis of composite structure of initial lining segment and secondary lining molded concrete. In: Liu, Z.L. and Mi, C. (eds.), Advances in Sustainable Port and Ocean Engineering. Journal of Coastal Research, Special Issue No. 83, pp. 300–304. Coconut Creek (Florida), ISSN 0749-0208. In the construction of second section water conveyance tunnel from Tuancheng Lake to No.9 water plant of Beijing South-to-North water transfer project, the second lining structure has the problems of large section, complex structure and difficult construction, and the self developed steel mould trolley has been used in concrete pouring of first lining of whole circle, thus making the entire lining section concrete a coherent whole, which effectively guarantees the lining quality and waterproof requirements of the water conveyance tunnel, and improves the durability. In order to analyze the superiority of the composite structure, in this paper, the theoretical analysis and numerical simulation are adopted to compare the ratio of maximum compressive stress to tensile stress between the shield segment and secondary lining molded concrete structure, and a quick and concise method to determine the optimal thickness of the optimal secondary lining molded concrete structure is proposed, which can provide reference for the rapid, safe and high-quality design and construction of large section water conveyance tunnel.