1.

If the total quantity of earth obtained from digging in the bed is equal to the quantity of earth required for the formation of the banks then this is known as economic digging.(a) False(b) TrueThis question was addressed to me in semester exam.This question is from Reports on Estimate for the Construction of Road and Irrigation Channel in chapter Valuation, Reports Technical and Design Data of Civil Engineering Drawing

Answer»

Right choice is (a) False

For explanation I would SAY: Also this canal is said to be designed with the balancing depth. Quantity of DIGGING = Quantity in banking i.e. Sectional AREA of digging = Sectional area of two banks or, Bd+sd2 = (b1+b2)*h+2S1 h2. Although it is never possible to adjust the canal section to this requirement but it MAY be quite possible in certain portions.

If the quantity of earthwork in the excavation is more than the quantity of earthwork in banking then the surplus earth is thrown away to form spoil bank.

If the quantity of earthwork in the excavation is less than that of banking then the extra earth is taken from borrow pots in the temporary land WHOSE area is calculated for temporary land acquisition.



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