A Case Study of the Measurement of the Spatial Correlation Length of Soil Parameters Using SPT and CPT Field Tests Data

DOI

10.2991/978-94-6463-258-3_62How to use a DOI?

Keywords

Slope stability; Data uncertainty; Reliability analysis; Random field; Spatial correlation length; SPT; and CPT field tests

Abstract

The Hoor-Al-Azim wetland is situated in the southwest of Iran and the southeast of Iraq, in the Middle East. Various industrial projects have been implemented in this region, and major projects are planned for the future. Therefore, geotechnical investigation of this area is crucial to understand its geology and geotechnics. It is necessary to determine the type and number of investigation tests required for this purpose. The water depth in Hoor-Al-Azim varies, but it is usually about 3-4 m. To facilitate access, some access road embankments have been constructed, and more will be implemented in the future. However, the slope stability of these embankments is uncertain due to the lack of reliable geotechnical properties. Hence, reliability analysis of trenches and slopes is needed.

The Random fields technique is one of the reliability analysis methods that can be employed. The spatial correlation length is a key parameter in this technique, and it can be calculated in several ways. Geotechnical site data analysis can provide the required information, which can be used in different geotechnical designs, such as slope stability analysis. Geotechnical data is usually derived from in-situ tests like CPT and SPT. While the comparison of SPT and CPT has been investigated in different aspects, evaluating and comparing the spatial correlation length obtained from these tests at the same site has not been discussed in technical literature. Therefore, in this article, geotechnical data obtained from the results of SPT and CPT tests at several sites in Hoor-Al-Azim has been investigated using Vanmarcke’s expeditive method (VXP). In general, the distance of CPT data is shorter than SPT data, resulting in less calculation of the spatial correlation length and more variability. The article also proposes some suggestions for the distance of boreholes by calculating the horizontal spatial correlation length.

Copyright

© 2023 The Author(s)

Open Access

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TY  - CONF
AU  - S. M. Asadollahi
AU  - A. Fakher
AU  - S. Javankhoshdel
PY  - 2023
DA  - 2023/11/08
TI  - A Case Study of the Measurement of the Spatial Correlation Length of Soil Parameters Using SPT and CPT Field Tests Data
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 666
EP  - 678
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_62
DO  - 10.2991/978-94-6463-258-3_62
ID  - Asadollahi2023
ER  -