The application of double-ring post-tensioned unbonded prestressed concrete lining is the first in the world. This paper introduces the selection of prestressed lining type of Xiaolangdi sand drainage tunnel, and expounds the structural characteristics and construction of the lining.
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Haining Li, Xianhui Liu Application of double-ring post-tensioned unbonded prestressing in Xiaolangdi sand drainage tunnel. Prestress Technology 1998,2(06):9-11. 10.59238/j. pt.1998.06.002