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A structure was built on a raft foundation.the raft rested at the ground surface on a stratum of uniform soft clay which extended to a depth of 50 m. If failure occurred at a uniformly distributed load of 25 tonnes/m2 and size of the raft was 20 m ×20 m ,calculate the average value of c for the clay use terzaghi theory ?
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A structure was built on a raft foundation.the raft rested at the grou...
Calculating Average Value of c for Clay using Terzaghi Theory
To calculate the average value of c for the clay using Terzaghi theory, we need to consider the following steps:

Determine Bearing Capacity
- The uniformly distributed load is 25 tonnes/m2.
- The size of the raft is 20 m × 20 m.
- Area of the raft = 20 m × 20 m = 400 m2.
- Total load on the raft = 25 tonnes/m2 × 400 m2 = 10000 tonnes.

Calculate Ultimate Bearing Capacity
- Ultimate bearing capacity (qult) = cNc + qNq + 0.5γBNγ
- For a raft foundation, Nc = 9, Nq = 15, and Nγ = 25.
- Given that qult = 10000 tonnes.
- Substituting the values, we get 10000 = 9c + 25(50) + 0.5(18)(50).
- Solving the equation, we can determine the value of c.

Find Average Value of c
- To find the average value of c, we need to consider the clay layer extending to a depth of 50 m.
- The average value of c for the clay can be calculated by taking the total value of c at different depths and dividing by the total depth.
- This will give us an average value of c that represents the entire clay layer supporting the raft foundation.
By following these steps and calculations, we can determine the average value of c for the clay using Terzaghi theory.
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A structure was built on a raft foundation.the raft rested at the ground surface on a stratum of uniform soft clay which extended to a depth of 50 m. If failure occurred at a uniformly distributed load of 25 tonnes/m2 and size of the raft was 20 m ×20 m ,calculate the average value of c for the clay use terzaghi theory ?
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A structure was built on a raft foundation.the raft rested at the ground surface on a stratum of uniform soft clay which extended to a depth of 50 m. If failure occurred at a uniformly distributed load of 25 tonnes/m2 and size of the raft was 20 m ×20 m ,calculate the average value of c for the clay use terzaghi theory ? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A structure was built on a raft foundation.the raft rested at the ground surface on a stratum of uniform soft clay which extended to a depth of 50 m. If failure occurred at a uniformly distributed load of 25 tonnes/m2 and size of the raft was 20 m ×20 m ,calculate the average value of c for the clay use terzaghi theory ? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A structure was built on a raft foundation.the raft rested at the ground surface on a stratum of uniform soft clay which extended to a depth of 50 m. If failure occurred at a uniformly distributed load of 25 tonnes/m2 and size of the raft was 20 m ×20 m ,calculate the average value of c for the clay use terzaghi theory ?.
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