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explain the interim inspection - underwater inspection of bridgean interim inspection is an inspection scheduled at the discretion of the engineer an
q test on complete bearingstwo bearings should be selected at random from the lot various tests should be conducted on these test bearings these
define the in-depth inspections for bridgein-depth inspection is a detailed inspection of one or more members below the water level to detect any
explain situations that warrant a damage inspection- floods - bridges located in streams rivers and other waterways with known or suspected scour
test on specially moulded test piece the test piece shall be moulded by the manufacturer with identical compound and under identical vulcanizing
explain the damage inspections - underwater inspection of bridgesometimes referred to as post-event inspections damage inspections are typically
q inspection and testing the inspection and tests on elastomer and the finished bearings are very important aspects of ensuring a satisfactory
q show the properties of elastomer though elastomeric bearings offer a number of advantages as compared to steel bearings many failures have been
determine the steps for routine inspectiona routine inspection should normally include- a level i inspection on 100 of the underwater portion of the
explain the routine inspections - inspection of bridgethese determine the physical and functional condition of the structure identifying changes from
explain the inventory inspections - inspection of bridgethese inspections are normally performed following new construction modifications or repair
q design of elastomeric bearingsthe standard drawings of bridge bearings issued by rdso are on the basis of uic 772-r to maintain uniformity of
define types of inspection of bridgeunderwater inspections are generally categorised into five types- inventory- routine- damage- in-depth-
q what do you mean by plain elastomeric padsplain pads are used for light or moderate loadings plain pads have a tendency to bulge under heavy
q what are basic types of elastomeric bearingsthree basic types of elastomeric bearings are used1 plain elastomeric pads2 steel reinforced
q natural rubber and synthetic rubberthere is often a confusion between the words elastomer and neoprene while elastomer refers to the generic name
explain the methods of underwater inspectionthere are three common methods of carrying out underwater inspection of bridge elementsa wading
q show the result of vulcanizationas a result of vulcanization rubber molecules are cross-linked with sulphur this cross-linking makes the rubber
define underwater inspection methods - inspection of bridgemethod for underwater inspection of a bridge depends on type and extent of damage expected
an elastomer is a polymeric substance obtained after vulcanization of rubber vulcanization is the process of improving the properties of rubber by
define deferred maintenance - underwater inspection of bridgemany problems of the substructure can be traced to lack of any maintenance in time which
define abrasion - underwater inspection of bridgedeterioration of substructures by abrasion is caused by wave action the velocity of the currents and
define storms - underwater inspection of bridgestorms can have a detrimental effect on bridge substructure the velocity and depth of water and debris
define collisions - underwater inspection of bridgestructural damage to underwater portions of a bridge can either be collision related or direct
q what do you mean by elastomeric bearingssteel bearings are good but suffer from problems of corrosion and high level of maintenance due to these