Author(s): Hideo Nakajima; Akio Katsuyama; Osamu Nakayama; Kiyoshi Mamiya
Linked Author(s):
Keywords: Field test of full-size dike; Seepage failure; Drain set at toe of back slope; 2-dimensional seepage flow analysis
Abstract: Authors carried out field tests on failure due to seepage for full-size uniform river dike temporarily constructed from soil, and observed on seepage flow in the dike and failure mode when rainfall and river water were given. Additionally, we checked the effect of countermeasure too. Results of the tests are as follows: (1) The seepage rate into dike in the case that enormous rainfall and saturation of dike were given before flood is accelerated a few times than the case that enormous rainfall was not given. (2) The failure of dike with seepage occurs when toe of back slope becomes muddy with saturation and shear strength remarkably decrease. (3) The drain set at toe of back slope to protect the seepage failure of dike is extremely effective. (4) The saturated-unsaturated2-dimensional seepage flow analysis has high accuracy and is practical sufficiently for this seepage flow in dike.
Year: 2002