Standard Tests for Double Triangular Manhole Covers
It is said that 90% of utility visits to manholes are to rehabilitate the manhole cover. This report includes research into two common double-triangular manhole cover failure modes: settlement of covers within their frames and polishing of the profiled cover surface.
The hypothesis that manhole cover settlement is directly related to load flexing is investigated through the correlation between finite element analysis of load flexing and the settlement measured at the corners of 278 in-service covers.
The mechanism by which cover profiles are worn down is described, and a standard test method is presented for accelerated simulation of this wear.
An apparatus and standard method for testing the skid resistance of manhole covers is also described. This will enable the development and specification of highly skid-resistant manhole covers, making travel safer for motorcyclists.
|UKWIR Reference :- 15/SW/02/2||Published Date :- 13/08/2015|
|Retail Price (£) :- 150||ISBN :- 1 84057 785 1|