A probabilistic model for CPT-based soil classification

Date

2003-07-09

Author

Çetin, Kemal Önder

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

188
views

0
downloads

Due to lack of soil sampling during a conventional cone penetration testing, it is necessary to classify soils based on recorded tip and sleeve friction values. Currently available semi-empirical methods of Robertson and Wride (1997) and Olsen and Mitchell (1995) exhibit a significant variability in the estimation of soil type based on cone penetration test (CPT) data. Thus within the confines of this paper it is attempted to present a new probabilistic CPT-based soil classification methodology which addresses the uncertainties intrinsic to the problem. For this purpose, a database composed of 4 10 CPT data pairs of tip resistance (q(c)), friction ratio (R-f) and soil classification based on Unified Soil Classification System (USCS) was compiled. Soil classification was performed by laboratory testing of the disturbed samples retrieved from the boreholes within 2 in of each CPT hole. It is intended to develop a probabilistic model, which will correlate CPT tip and sleeve friction values to actual soil classification.

Subject Keywords

Cone penetration test, Soil classification, Maximum likelihood methodology, Limit state models

URI

https://hdl.handle.net/11511/52724

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Estimation of grain characteristics of soils by using cone penetration test (CPT) data Ozan, Cem; Çetin, Kemal Önder; Department of Civil Engineering (2003) Due to lack of soil sampling during a conventional cone penetration testing (CPT), it is necessary to classify soils based on recorded tip and sleeve friction and pore pressure (if available) values. However, currently available soil classification models are based on deterministic and judgemental determination of soil classification boundaries which do not address the uncertainties intristic to the problem. Moreover, size and quality of databases used in the development of these soil classification models ...
An Investigation of the increase in variability of standard penetration test results for gravelly soils Pehlivan, Alper; Yılmaz, Mustafa Tolga; Department of Engineering Sciences (2019) Variability in the results of standard penetration tests (SPT) due to nonuniformity of particle size distribution in soil layers is a known issue in geotechnical applications. Such phenomenon may result in artificial increase in penetration resistance in silts, clays and sands due to encountering large particles. An analysis of SPT variability in such cases can be conducted by dividing the total penetration distance into two smaller segments. In this study, the difference between number of blow counts for t...
A Preliminary study on construction of a high capacity tensiometer and its use in measurement of matrik suction in unsaturated soils Köksalan, Ali Okan; Toker, Nabi Kartal; Department of Civil Engineering (2013) Soil suction is one of the main state parameters that governs unsaturated soil behaviour. Tensiometers are the only type of probe that can measure soil suction directly, but only up to 90 kPa. In the past two decades, a new type of tensiometer with much greater measurement range (up to 2 MPa) has appeared in the literature. The measurement range (i.e. capacity) of a tensiometer is limited by (i) how well it is saturated, and (ii) the air entry value of its porous interface. In this study, the first high cap...
THE EFFECTS OF HAMMER-ROD ALIGNMENT AND ROD LENGTH ON SPT HAMMER EFFICIENCY Çevik, Mustafa Efekan; Çetin, Kemal Önder; Department of Civil Engineering (2021-12-6) The Standard Penetration Test (SPT) is the most widely used in-situ dynamic penetration test to identify the geotechnical properties of mostly cohesionless soils for over 100 years. Although ASTM defines the procedure of the SPT, the test itself has special variabilities due to many uncertainties. It can be seen that, with different equipment and operator, one can obtain significantly different SPT-N values that belong to the same soil profile. To minimize this difference, some correction factors are ...
A laboratory study of anisotropy in engineering properties of Ankara clay İspir, Mustafa Erdem; Ergun, Mehmet Ufuk; Department of Civil Engineering (2011) Anisotropy in engineering properties of soils occurs due to the depositional process forming the soil fabric and/or different directional stresses in soil history. This study investigates the anisotropy in undrained shear strength and drained compressibility of preconsolidated, stiff and fissured Ankara Clay. The compressibility behavior is determined using standard oedometer testing while the shear strength anisotropy is investigated through large diameter unconsolidated-undrained triaxial testing on undis...

Citation Formats

K. Ö. Çetin, “A probabilistic model for CPT-based soil classification,” 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52724.