UNIT-IV
DIVERSION HEAD WORKS: TYPES OF DIVERSION
HEAD WORKS- WEIRS AND BARRAGES,
LAYOUT OF DIVERSION HEAD WORK –
COMPONENTS. CAUSES AND FAILURE OF WEIRS
AND BARRAGES ON PERMEABLE FOUNDATIONS,-
SILT EJECTORS AND SILT EXCLUDERS
WEIRS ON PERMEABLE FOUNDATIONS – CREEP
THEORIES – BLIGH’S, LANE’S AND
KHOSLA’S THEORIES, DETERMINATION OF UPLIFT
PRESSURE- VARIOUS CORRECTION
FACTORS – DESIGN PRINCIPLES OF WEIRS ON
PERMEABLE FOUNDATIONS USING CREEP
THEORIES – EXIT GRADIENT, U/S AND D/S SHEET
PILES – LAUNCHING APRON