MAJOR PROJECT REPORT ON COMPUTER AIDED DESIGN OFTUNNEL - TYPE SILT EJECTOR

Abstract

A tunnel type silt ejector is commonly used at the downstream of head regulator of the canal to eject the sediments, which has already entered into the canal. In such ejectors, the sediment-laden water, which flows near the bed, is made to flow through the tunnels provided at the canal bed. It is then discharged into the river through outfall channel. Comparatively sediment-free water is obtained at the downstream of silt ejector. The basic hydraulic principle utilized in designing silt ejector is that the energy loss (head loss) is kept minimum and equal in all tunnels carrying equal discharge. In the present project, a silt ejector is designed based on IS-6004 guidelines Using the guidelines of IS-6004, the present work has been planned to design a silt ejector for a canal based on the recent concept of sediment transport through closed conduit. The present project work has been planned with the following objectives: (a) To collect the data for designing sediment ejector from the executing agency in the field. (b) To design the components of silt ejector, particularly tunnels and subtunnels, based on the existing sediment transport concept through the closed conduit. (c) To develop a computer program in C++ language to make the design of sediment ejector easier as several trails are involved for setting the efficient structure