Bligh’s Creep Theory

BLIGH’S CREEP THEORY This theory is base on the assumption that seeping water through the soil below the weir Follows the path along with the contact of the base, with the underlying sub-soil. The length of the path of seeping water from the point of entry into the sub-soil from the U/S of the impervious. Apron to the point at the D/S end of the impervious apron is know creep length. Bligh also assumed that loss of head of the seeping water is proportional to the length of its travel irrespective of whether. The length of travel is in the horizontal or vertical direction. He also assumes that unless cut-off sheet piles extent to the impervious subsoil strata, no amount of sheet piling could stop the flow of percolating water. AB is the length of impervious apron l and H is the head of water-fill up to the top of…

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