The following time-compression data was obtained from an oedometer test during consolidation following the application of a load increment. If the thickness of the doubly drained sample is 17.0 mm, calculate the coefficient of consolidation using the Square Root Fitting Method and the Log Time Fitting Method.| Dial Gauge Reading (mm) | Time ||-------------------------|---------|| 8.99 | 0 || 9.10 | 6 sec || 9.14 | 12 sec || 9.21 | 30 sec || 9.29 | 1 min || 9.39 | 2 min || 9.50 | 4 min || 9.65 | 8 min || 9.74 | 20 min || 9.77 | 40 min || 9.79 | 100 min |This table shows the relationship between the dial gauge reading (in millimeters) and time during the oedometer test. The data is used to determine the coefficient of consolidation for the sample. The Square Root Fitting Method and Log Time Fitting Method can be applied to analyze this data.

Solution: Given Data: The thickness of doubly drained sample =17.0 mm

The following time-compression data was obtained from an oedometer test during consolidation following the application of a load increment: If the thickness of the doubly drained sample is 17.0mm calculate the coefficient of consolidation use (Square Root Fitting Method) and (Log Time Fitting Method )

The following time-compression data was obtained from an oedometer test during consolidation following the application of a load increment: If the thickness of the doubly drained sample is 17.0mm calculate the coefficient of consolidation use (Square Root Fitting Method) and (Log Time Fitting Method )

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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Concept explainers

Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.

Question

The following time-compression data was obtained from an oedometer test during consolidation following the application of a load increment. If the thickness of the doubly drained sample is 17.0 mm, calculate the coefficient of consolidation using the Square Root Fitting Method and the Log Time Fitting Method.

| Dial Gauge Reading (mm) | Time |
|-------------------------|---------|
| 8.99 | 0 |
| 9.10 | 6 sec |
| 9.14 | 12 sec |
| 9.21 | 30 sec |
| 9.29 | 1 min |
| 9.39 | 2 min |
| 9.50 | 4 min |
| 9.65 | 8 min |
| 9.74 | 20 min |
| 9.77 | 40 min |
| 9.79 | 100 min |

This table shows the relationship between the dial gauge reading (in millimeters) and time during the oedometer test. The data is used to determine the coefficient of consolidation for the sample. The Square Root Fitting Method and Log Time Fitting Method can be applied to analyze this data.

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