Figure 5 – uploaded by Ripon Chandra Malo

Figure 5: Comparative analysis of internal friction angle from SPT, CPT, DS and MST tests. of internal friction angle from SPT, CPT, DS and MST tests is shown in Fig. 5 value with increasing depth for correlations of Robertson and Campanella. Comparative analysis — Figure 5 Comparative analysis of internal friction angle from SPT, CPT, DS and MST tests. of internal friction angle from SPT, CPT, DS and MST tests is shown in Fig. 5 value with increasing depth for correlations of Robertson and Campanella. Comparative analysis

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Figure 1: Depth with corrected cone tip resistance (q,), SPT-N, (N) 60 and (N1) 60 values for all boreholes. Summarization a few of literatures, Robertson et.al (1983) collected several research outputs and presented a relationship of qc/N60 as a function of mean grain size (D509). Kasim et al. (1986) and, Kulhawy and Mayne (1990), where they have presented more updated databases to correlate qc/N as a function of mean grain size (Dso) compared to the proposed relationship by Robertson et.al (1983). These correlations provide a very useful guideline to convert the CPT tip resistance to the equivalent SPT N-value for soils with Ds) varying between 0.001 mm to 10 mm. They also observed that the scatter in qc/N ratio increase with increasing mean grain size and the The geological formations of the Bangladesh are predominantly consisting of alluvial sand and silty deposits (Alam et al. 1990). Two field tests were performed named SPT and CPT. Three sets of CPT and SPT were executed in different locations which is not more than 10 m horizontally. A soil profile is presented in Fig. 1:

Figure 5 – uploaded by Ripon Chandra Malo

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