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Direct shear test can be conducted for :
- a)UU drainage conditions
- b)CU drainage conditions
- c)CD drainage condition
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Direct shear test can be conducted for :a)UU drainage conditionsb)CU ...
1. Unconsolidated Undrained Test (UU)
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Drainage is not permitted throughout the test. In the case of direct shear test drainage is not permitted during the application of both normal stress and shear stress. In the case of triaxial compression test drainage is not permitted during the application of both cell pressure and deviator stress. Since the test is conducted fast allowing no time for either consolidation of sample initially or dissipation of pore pressure in later stage, the test is also called quick test.
2. Consolidated Undrained Test (CU)
In this type of shear test the soil specimen is allowed to consolidate fully under initially applied stress and then sheared quickly without allowing dissipation of pore pressure. In the case of direct shear test the specimen is allowed to consolidate fully under applied normal stress and then sheared at high rate of strain to prevent dissipation of pore pressure during shearing. In the case of triaxial compression test the specimen is allowed to consolidate fully under the applied cell pressure and then the pore water outlet is closed and the specimen is subjected to increasing deviator stress at higher rate of strain.
3. Consolidated Drained Test (CD)
In this type of shear test drainage is allowed throughout the test. The specimen is allowed to consolidate fully under the applied initial stress and then sheared at low rate of strain giving sufficient time for the pore water to drain out at all stages. The test may continue for several hours to several days.
Hence, the correct option is (D)
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Direct shear test can be conducted for :a)UU drainage conditionsb)CU ...
Direct Shear Test for Different Drainage Conditions
The direct shear test is a laboratory test that determines the shear strength parameters of soil. It is conducted by applying a constant normal stress to the soil sample and then shearing it horizontally along a predefined plane. The test can be conducted for different drainage conditions, which are as follows:
1. UU Drainage Condition
In the unconsolidated-undrained (UU) drainage condition, the soil sample is not allowed to drain during the test. This means that the pore water pressure in the soil remains constant throughout the test. This condition is suitable for testing saturated soils that are expected to experience rapid loading or are expected to fail in an undrained condition.
2. CU Drainage Condition
In the consolidated-undrained (CU) drainage condition, the soil sample is consolidated under an initial vertical stress before shearing. The pore water pressure is not allowed to dissipate during the shearing process. This condition is suitable for testing soils that are expected to experience slow loading or are expected to fail in a partially drained condition.
3. CD Drainage Condition
In the consolidated-drained (CD) drainage condition, the soil sample is consolidated under an initial vertical stress, and the pore water pressure is allowed to dissipate before shearing. This condition is suitable for testing soils that are expected to experience slow loading or are expected to fail in a fully drained condition.
4. All of the Above
The direct shear test can be conducted for all of the above drainage conditions, depending on the specific characteristics of the soil being tested. By conducting tests under different drainage conditions, engineers can obtain a more comprehensive understanding of the shear strength parameters of the soil and its behavior under different loading and drainage conditions.
Conclusion
In conclusion, the direct shear test can be conducted for different drainage conditions, including UU, CU, and CD conditions. Each drainage condition is suitable for testing different types of soils and provides valuable information about the soil's shear strength parameters. By conducting tests under different drainage conditions, engineers can obtain a more comprehensive understanding of the soil's behavior and make informed decisions about its use in construction projects.
The direct shear test is a laboratory test that determines the shear strength parameters of soil. It is conducted by applying a constant normal stress to the soil sample and then shearing it horizontally along a predefined plane. The test can be conducted for different drainage conditions, which are as follows:
1. UU Drainage Condition
In the unconsolidated-undrained (UU) drainage condition, the soil sample is not allowed to drain during the test. This means that the pore water pressure in the soil remains constant throughout the test. This condition is suitable for testing saturated soils that are expected to experience rapid loading or are expected to fail in an undrained condition.
2. CU Drainage Condition
In the consolidated-undrained (CU) drainage condition, the soil sample is consolidated under an initial vertical stress before shearing. The pore water pressure is not allowed to dissipate during the shearing process. This condition is suitable for testing soils that are expected to experience slow loading or are expected to fail in a partially drained condition.
3. CD Drainage Condition
In the consolidated-drained (CD) drainage condition, the soil sample is consolidated under an initial vertical stress, and the pore water pressure is allowed to dissipate before shearing. This condition is suitable for testing soils that are expected to experience slow loading or are expected to fail in a fully drained condition.
4. All of the Above
The direct shear test can be conducted for all of the above drainage conditions, depending on the specific characteristics of the soil being tested. By conducting tests under different drainage conditions, engineers can obtain a more comprehensive understanding of the shear strength parameters of the soil and its behavior under different loading and drainage conditions.
Conclusion
In conclusion, the direct shear test can be conducted for different drainage conditions, including UU, CU, and CD conditions. Each drainage condition is suitable for testing different types of soils and provides valuable information about the soil's shear strength parameters. By conducting tests under different drainage conditions, engineers can obtain a more comprehensive understanding of the soil's behavior and make informed decisions about its use in construction projects.
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Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer?
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Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer?.
Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direct shear test can be conducted for :a)UU drainage conditionsb)CU drainage conditionsc)CD drainage conditiond)All of the aboveCorrect answer is option 'D'. Can you explain this answer?.
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