2019 · Paper 1

Complete GATE CE 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.

Question 54

Open question

CENAT2 marksNeeds review

A 3



× 3



square precast reinforced concrete segments to be installed by pushing them through an existing railway embankment for making an underpass as shown in the figure. A reaction arrangement using precast PCC blocks placed on the ground is to be made for the jacks.



At each stage, the jacks are required to apply a force of 1875



to push the segment. The jacks will react against the rigid steel plate placed against the reaction arrangement. The footprint area of reaction arrangement on natural ground is 37.5



. The unit weight of PCC block is 24



. The properties of the natural ground are:



;



and



. Assuming that the reaction arrangement has rough interface and has the same properties that of soil, the factor of safety (round off to 1 decimal place) against shear failure is ________.

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Question 55

Open question

CENAT2 marksNeeds review

A square footing of 4



side is placed at 1



depth in a sand deposit. The dry unit weight (



) of sand is 15



. This footing has an ultimate bearing capacity of 600



. Consider the depth factors:



and the bearing capacity factor:



. This footing is placed at a depth of 2



in the same soil deposit. For a factor of safety of 3.0 as per Terzaghi’s theory, the safe bearing capacity (in



) of this footing would be ________.

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