Deformation Characteristics of Large Channel Bed During the Process of Water Loading

Meng Wei;Fan Guisheng;Zheng Yi;College of Water Resource Science and Engineering, Taiyuan University of Technology;

large channels;;elastic deformation;;plastic deformation;;design level

In order to study if the settlement and displacement created by the first loading process of thereconstruction of large channel will have great effect to irrigation requirements, based on the deformationobservation situ test of large trapezoidal channels arc bottom concrete seepage-proofing channel loading andunloading process, the author analyzed the deformation characteristics of the reconstruction large channel bedafter the process of loading and unloading for the first time. The results showed that: in the process of loadingand unloading for the first time of reconstruction large channel, would happen to a large elastic deformation andplastic deformation, the channel settlement and spring back amount in the vertical had certain characteristicswith the external load changing; The subsidence displacement of the large reconstructed channel which createdby the first loading process had larger relationship with the unsaturation soil thickness which below channelbottom; due to the channel in the process of loading and unloading for the first time had a larger settlement invertical, to satisfy the irrigation conditions, should take some necessary measures in the channel design andconstruction.