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Determine the Steps for routine inspection?
A routine inspection should normally include:
- A Level I inspection on 100% of the underwater portion of the structure to determine obvious problems
- A Level II inspection on 20% of underwater units selected as determined by the Level I inspection
- A Level III inspection may need to be performed to gain additional data so that structural condition is evaluated with certainty.
- Sounding to be made in a grid pattern about each pier and up stream and down stream of a bridge to detect areas of scour. Local scour to be determined with probes in the vicinity of piers and abutments.
purpose
Explain Situations that warrant a damage inspection? - Floods - bridges located in streams, rivers and other waterways with known or suspected scour potential. - Build-up of
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minimun difference in level of inlet and oulet pipe level invert in manhole
Choice of Pavement: The advantages and drawback of the two types of pavements are summarized in Table, to enable a choice to be made. Table : Advantages and drawback of
If y1 and y2 are alternate depths of a rectangular channel show that Yc³ =2y1²y2²/(y1+y2) Also specific energy E = y1²+y1y2+y2²/(y1+y2)
advantage and disadvantage of spirit levelling
Explain Equations for a triangular (V-notch weir) Used for small flow rates. C 2 is a coefficient which varies from 0.58 to 0.61 depending upon the notch angle. Q = C
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Q. Location of construction joints? Construction joints are generally required in construction works since there is limited supply of fresh concrete in concrete batching plants
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