Design Analysis and Experimental Investigation of Adjustable Height Manhole System

This is often seen that when the roads are to be repaired or re-tarred the man holes get covered up due increase in height of the road and hence they have to reconstructed to adapt to the height of the road else Misaligned manhole frames in streets often cause driving hazards, failure of pavement around the frames, cause poor access to manholes,may be responsible for inflow and infiltration and can also result in other problems. Because manhole frames are not manufactured to be adjustable, an effort to make repairs is time consuming and often in effective. Thus there is a need to develop an height adjustable manhole system where in manhole system be constructed by casting the manhole by suitable method according to the Indian Standard so as to make the system flexible enough to adjust the height of the manhole as per requirement. The scaled model of the height adjustable manhole will be made and solid modeling using Unigraphix software will be done to determine optimal dimension of gear-shaped parts through bending stress formulas and application Ansys work bench software to validate the strength of the manhole analytically. Fabrication of the scaled model will be done after appropriate selection of the nodular cast iron frame work, for nut and screw parts where as the holder elements will be developed by fabrication. Testing will be done bysuitable methods to determine and experimentally validate the strength of the developed part of the manhole.