Q3 | A bridge pier is to be constructed in a river bed by constructing a cofferdam as shown in Figure below . A cofferdam is temporary enclosure consisting of | long, slender elements of steel, concrete, or timber members to support the sides of enclosure. After constructing the cofferdam, the water within it will be pumped out. Determine : (a) the flow net rate using k = 1×10* cm/sec . (b) the factor of safety against piping. The void ratio of the sand is 0.59and assume /=0.3 m. 3 m Top of sand 3 m 3 m

Q3 | A bridge pier is to be constructed in a river bed by constructing a cofferdam as shown in Figure below . A cofferdam is temporary enclosure consisting of | long, slender elements of steel, concrete, or timber members to support the sides of enclosure. After constructing the cofferdam, the water within it will be pumped out. Determine : (a) the flow net rate using k = 1×10* cm/sec . (b) the factor of safety against piping. The void ratio of the sand is 0.59and assume /=0.3 m. 3 m Top of sand 3 m 3 m

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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3 “A bridge pier is to be constructed in a river bed by constructing a cofferdam as shown in Figure below . A cofferdam is temporary enclosure consisting of long, slender elements of steel, concrete, or timber members to support the sides of enclosure. After constructing the cofferdam, the water within it will ‘be pumped out. Determine (@) the flow net rate using k = 1x10™ cm/sec . (b) the factor of safety against piping. The void ratio of the sand is 0.59and assume [=0.3m.
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Three pipes A,B and C coonected in seies discharges 160 L/s of water. The properties of pipe: for pipe A,L= 1800 m, diameter= 0.90 m f= 0.012; for pipe B, L= 1500 m, diameter= 0.60 m f=0.012 and for pipe C, L= 800 m , diameter = 0/45 m, f= 0.012. Disregarding minor losses, find the diameter of an equivalent single pipe which can replace the three pipe. answers: a.0.492 m. b.0.750 m. c.1.15 m. d.0.574 m.