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doi:10.3850/978-981-08-7920-4_S2-S06-cd
Design Analysis of Superposed Aqueduct with Longitudinal Ppcbs and Segregated Cast-in-Situ RCF
S. B. Zhao, S. W. Pei and X. J. Liang
School of Civil Engineering and Communication, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, P.R. China.
ABSTRACT
Combined with the structural design of left-shore drainage aqueducts in China South-to-north
Water Transfer Project, the superposed aqueduct with longitudinal precast prestressed concrete
beams (PPCBs) and segregate cast-in-situ reinforced concrete flume (RCF) was drafted, 11
longitudinal T-sectional PPCBs with flange width of 2.1mand height of 1.45mwere composited
to support the cast-in-situ RCF in span of 17.0m with total width of 25.6m and height of
2.0m, the subplate of RCF is segregated by asphalt layer on the top surface of PPCBs. The
three-dimensional finite element models were built to study the normal service behaviors of
the large superposed aqueduct compared with that of the entire cast-in-situ structure. Based
on the calculation, the stresses and displacements of longitudinal PPCBs, the subplate of RCF in
different loading cases of self-weight load, designwater load and checkwater load are analyzed.
The results provide valuable reference for designing the same kind of aqueduct.
Keywords: Aqueduct, Superposed structure, Precast prestressed concrete, Cast-in-situ reinforced concrete, Longitudinal beam, Flume, Segregate layer, Finite element analysis.
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