A raft foundation of 30 m x 25 m is proposed to be constructed at a depth of 8 m in a sand layer. A 25 m thick saturated clay layer exists 2 m below the base of the raft foundation. Below the clay layer, a dense sand layer exists at the site. A 25 mm thick undisturbed sample was collected from the mid-depth of the clay layer and tested in a laboratory oedometer under double drainage condition. It was found that the soil sample had undergone a 50 % consolidation settlement in 10 minutes. The time (in days) required for 25 % consolidation settlement of the raft foundation will be (round off to the nearest integer)
A raft foundation of 30 m x 25 m is proposed to be constructed at a depth of 8 m in a sand layer. A 25 m thick saturated clay layer exists 2 m below the base of the raft foundation. Below the clay layer, a dense sand layer exists at the site. A 25 mm thick undisturbed sample was collected from the mid-depth of the clay layer and tested in a laboratory oedometer under double drainage condition. It was found that the soil sample had undergone a 50 % consolidation settlement in 10 minutes. The time (in days) required for 25 % consolidation settlement of the raft foundation will be (round off to the nearest integer)
Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter2: Geotechnical Properties Of Soil
Section: Chapter Questions
Problem 2.14P
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Question
![A raft foundation of 30 m x 25 m is
proposed to be constructed at a depth
of 8 m in a sand layer. A 25 m thick
saturated clay layer exists 2 m below
the base of the raft foundation. Below
the clay layer, a dense sand layer exists
at the site. A 25 mm thick undisturbed
sample was collected from the
mid-depth of the clay layer and tested
in a laboratory oedometer under double
drainage condition. It was found that
the soil sample had undergone a 50 %
consolidation settlement in 10 minutes.
The time (in days) required for 25 %
consolidation settlement of the raft
foundation will be
(round off to the nearest integer)
...](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9a9c13a1-f637-4e6d-892d-5333c912d1a6%2F0956ecfc-9408-4b7c-acd6-745d74deca97%2Foge6gop_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A raft foundation of 30 m x 25 m is
proposed to be constructed at a depth
of 8 m in a sand layer. A 25 m thick
saturated clay layer exists 2 m below
the base of the raft foundation. Below
the clay layer, a dense sand layer exists
at the site. A 25 mm thick undisturbed
sample was collected from the
mid-depth of the clay layer and tested
in a laboratory oedometer under double
drainage condition. It was found that
the soil sample had undergone a 50 %
consolidation settlement in 10 minutes.
The time (in days) required for 25 %
consolidation settlement of the raft
foundation will be
(round off to the nearest integer)
...
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