A group of total 16 piles are arranged in a square grid format. The center-to-center spacing (s) between adjacent piles is 3 m. The diameter (d) and length of embedment of each pile are 1 m and 20 m, respectively. The design capacity of each pile is 1000 kN in the vertical downward direction. The pile group efficiency $${\eta _g}$$ is given by
$${\eta _g} = 1 - {\theta \over {90}}\left[ {{{(n - 1)m + (m - 1)n} \over {mn}}} \right]$$
where m and n are number of rows and columns in the plan grid of pile arrangement and $$\theta = {\tan ^{ - 1}}\left( {{d \over s}} \right)$$.
The design value of the pile group capacity (in kN) in the vertical downward direction is _________. (round off to the nearest integer)
In a triaxial unconsolidated undrained (UU) test on a saturated clay sample, the cell pressure was 100 kPa. If the deviatoric stress at failure was 150 kPa, then the undrained shear strength of the soil is _________ kPa. (in integer)
Match Column X with Column Y :
Column X | Column Y |
---|---|
(P) Horton equation | (I) Design of alluvial channel |
(Q) Penman method | (II) Maximum flood discharge |
(R) Chezy's formula | (III) Evapotranpiration |
(S) Lacey's theory | (IV) Infiltration |
(T) Dicken's formula | (V) Flow velocity |
Which one of the following combinations is correct?