Answered: An oedometer (consolidation) test is…

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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Geotechnical

$**Problem 8:** An oedometer (consolidation) test is performed on a 4" thick specimen, drained on top and bottom. It was observed that 45 percent consolidation ($T_v = 0.15$) was attained in 78 hours. Determine the time required to attain 70 percent consolidation ($T_v = 0.40$) in a job site where the clay stratum is shown below. --- **Diagram Explanation:** The diagram illustrates a cross-section of soil layers under a building load represented by a block labeled "Building's load $q = 4 $ kg/m²". The soil profile includes: 1. **Top Layer:** 20 feet of sand. 2. **Middle Layer:** 25 feet of clay, denoted as the layer undergoing consolidation. 3. **Bottom Layer:** Sand. The water table (WT) is indicated by a blue dashed line within the top sand layer. The load from the building applies pressure impacting the consolidation of the clay layer. This setup is used to determine how long it will take to achieve a specified level of consolidation under the given conditions.$

Transcribed Image Text:**Problem 8:** An oedometer (consolidation) test is performed on a 4" thick specimen, drained on top and bottom. It was observed that 45 percent consolidation ($T_v = 0.15$) was attained in 78 hours. Determine the time required to attain 70 percent consolidation ($T_v = 0.40$) in a job site where the clay stratum is shown below. --- **Diagram Explanation:** The diagram illustrates a cross-section of soil layers under a building load represented by a block labeled "Building's load $q = 4 $ kg/m²". The soil profile includes: 1. **Top Layer:** 20 feet of sand. 2. **Middle Layer:** 25 feet of clay, denoted as the layer undergoing consolidation. 3. **Bottom Layer:** Sand. The water table (WT) is indicated by a blue dashed line within the top sand layer. The load from the building applies pressure impacting the consolidation of the clay layer. This setup is used to determine how long it will take to achieve a specified level of consolidation under the given conditions.

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