Numerical Simulation Of Continuous Cone Penetration And Interpretation Of Cptu Dissipation Tests
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Numerical Simulation of Continuous Cone Penetration and Interpretation of CPTu Dissipation Tests
The piezocone penetration test (CPTu) is a commonly used method of geotechnical site investigation. The CPTu is especially useful because it provides a nearly continuous data profile of in-situ soil behavior, which can be correlated to useful engineering parameters. However, limitations exist for interpretation of geotechnical properties from CPTu data and for numerical analysis of cone penetration problems. The research presented in this thesis examines interpretation of coefficient of consolidation from CPTu dissipation test data and implementation of an algorithm to advance numerical simulation of cone penetration problems. This thesis presents analysis of CPTu dissipation responses from field-measured and numerically simulated dissipation tests and their interpretation, according to four published methods. The performance of these methods in interpreting assigned model properties is examined under various conditions of vertical and horizontal hydraulic conductivities and OCR. The analysis indicates that existing methods of interpreting coefficient of consolidation from dissipation tests fall short in two areas: improper interpretation of non-monotonic dissipation and inaccurate neglect of the role of vertical pore pressure migration during dissipation testing. A useful tool in studying CPTu site investigation and dissipation testing is high quality numerical simulation of CPTu testing. Moug described an ALE model for steady-state simulation of cone penetration at a single depth using the MIT-S1 constitutive model, which accurately represents clayey and silty behavior well, including anisotropic loading of clay. This is especially important because of the complex anisotropic stress conditions that exist around the cone. However, due to its remeshing step, the Moug model is limited to simulation of a single soil layer at a single depth. This thesis describes the implementation and verification of a linear elastic finite-element adaptive remeshing algorithm that, when integrated with the Moug model, provides a numerical scheme capable of simulating penetration through depth in a soil profile, while retaining the valuable constitutive performance of the original model.
Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2
This is the third volume of the proceedings of the 8th International Congress on Environmental Geotechnics (ICEG 2018), held on October 28 - November 1, 2018 in Hangzhou, China. The theme of the congress is “Towards a Sustainable Geoenvironment”, which means meeting the needs of the present generation without compromising the ability of future generations to meet their own needs. Under this theme, the congress covers a broad range of topics and provides an excellent opportunity for academics, engineers, scientists, government officials, regulators, and planners to present, discuss and exchange notes on the latest advances and developments in the research and application of environmental geotechnics.
Cone Penetration Testing 2022
This volume contains the proceedings of the 5th International Symposium on Cone Penetration Testing (CPT’22), held in Bologna, Italy, 8-10 June 2022. More than 500 authors - academics, researchers, practitioners and manufacturers – contributed to the peer-reviewed papers included in this book, which includes three keynote lectures, four invited lectures and 169 technical papers. The contributions provide a full picture of the current knowledge and major trends in CPT research and development, with respect to innovations in instrumentation, latest advances in data interpretation, and emerging fields of CPT application. The paper topics encompass three well-established topic categories typically addressed in CPT events: - Equipment and Procedures - Data Interpretation - Applications. Emphasis is placed on the use of statistical approaches and innovative numerical strategies for CPT data interpretation, liquefaction studies, application of CPT to offshore engineering, comparative studies between CPT and other in-situ tests. Cone Penetration Testing 2022 contains a wealth of information that could be useful for researchers, practitioners and all those working in the broad and dynamic field of cone penetration testing.