Civil and Building Engineering.

1 Time Rates of Settlement: When a soil is subjected to an increase in effective stress, the porewater is squeezed out in a manner similar to water being squeezed from a sponge, and the basic concepts presented above govern the time rate of settlement of the surface of a clay layer...

2 One-Dimensional Consolidation Testing: It is not realistic to measure the consolidation characteristics of many soils in the field because the time necessary to do so is usually many years. Instead, soil samples are obtained as part of the field investigation program and representative samples are tested in the laboratory...

3 The Consolidation Curve: Several parts of the analysis must be altered to conform to the methods nor-
mally used in engineering practice...

4 Calculation of Total Settlement: Among the first problems is to investigate the spring constant of the soil...

5 Calculation of Settlement Due to Consolidation: Sufficient data have now been presented so that the total settlement under a wide embankment can be calculated...

6 Reconstruction of the Field Consolidation Curve: The consolidation curve measured in the testing laboratory is not used directly for computation of total settlement because it represents the behavior of soil
in the laboratory, not in the field...

7 Effects of Sample Disturbance on Consolidation Properties: One problem remains: whether or not the laboratory tests give properties that can be used directly in the field...

8 Correlation of Consolidation Indices with Index Tests: On small projects, it may not be economically possible to perform laboratory tests. Consequently, geotechnical design computations are carried out using
estimated values for soil properties...

9 Comments on Accuracy of Settlement Computations: Accuracy of Predictions of Total Settlement One-dimensional settlement analyses are used in estimating total settlements, and the rates at which they
occur, under the central parts of loads that are wide compared to the depth of the compressible layer...