Foundation Engineering 5 min read
Combined vertical and horizontal flow
Carillo (1942 and Asaoka (1978) developed Eq. 4.2 to express the average degree of consolidation for the case of combined…
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Foundation Engineering 11 min read
Vertical Drains To Accelerate Settlement
Introduction All materials will undergo volume change when subjected to stress change and soils are no exception. Unlike steel or…
Foundation Engineering 4 min read
The Janbu Method versus Conventional Methods
The Janbu tangent modulus method is not different to—does not contrast or conflict with—the ‘conventional’ methods. The Janbu method for…
Foundation Engineering 3 min read
The Janbu Approach
General The Janbu approach, proposed by Nilmar Janbu in the early 1960s (Janbu 1963; 1965; 1967), and referenced by the…
Foundation Engineering 3 min read
Linear Deformation (“Elastic”)
Linear stress-strain behavior follows Hooke’s law (“elastic modulus method”) according to Eq. 3.1. The “elastic modulus” is often called Young’s…
Foundation Engineering 5 min read
Settlement Calculation
Introduction A foundation is a constructed unit that transfers the load from a superstructure to the ground. With regard to…
Foundation Engineering 3 min read
Comparison between the Eslami-Fellenius and Robertson (1990) Methods
To provide a direct comparison between the Robertson (1990) profiling chart and the Eslami-Fellenius chart, three short series of CPTU…
Foundation Engineering 3 min read
The Eslami-Fellenius CPTU Profiling and Soil Behaviour Type Classification Method
To investigate the use of cone penetrometer data in pile design, Eslami and Fellenius (1997) compiled a database consisting of…
Foundation Engineering 3 min read
Robertson (1990)
Robertson (1990) proposed a development of the Robertson et al. (1986) profiling chart, shown in Fig. 2.8, plotting a “normalized…
Foundation Engineering 3 min read
Vos (1982)
Vos (1982) suggested using the electrical cone penetrometer for Dutch soils to identify soil types from the friction ratio, as…
Foundation Engineering 3 min read
Schmertmann (1978)
Schmertmann (1978) proposed the soil profiling chart shown in Fig. 2.4A. The chart is based on results from mechanical cone…
Foundation Engineering 3 min read
Brief Survey of Soil Profiling Methods
Begemann (1965) Begemann (1965) pioneered soil profiling from the CPT, showing that, while coarse-grained soils generally demonstrate larger values of…