Dredging Operations Technical Support Program. Mathematical Model of the Consolidation/Desiccation Processes in Dredged Material

This report documents the development of a mathematical model of the consolidation/desiccation process in soft, fine-grained soils such as dredged material; provides for computer solution of the model; and verifies the solution through comparisons with field measurements. The consolidation process i...

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Bibliographic Details
Main Author: Cargill,K W
Format: Report
Language:English
Subjects:
Civil Engineering
COMPUTER PROGRAMS
COMPUTERIZED SIMULATION
CONFINEMENT(GENERAL)
Consolidation(Soils)
DISPOSAL
DREDGED MATERIALS
DRYING
FIELD TESTS
FINE GRAINED MATERIALS
MATERIALS
MATHEMATICAL MODELS
MEASUREMENT
NONLINEAR SYSTEMS
OUTPUT
PCDDF computer program
Settlement(Structural)
SITES
Soil Mechanics
SOILS
SOLUTIONS(GENERAL)
USER MANUALS
WASTE DISPOSAL
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Summary:This report documents the development of a mathematical model of the consolidation/desiccation process in soft, fine-grained soils such as dredged material; provides for computer solution of the model; and verifies the solution through comparisons with field measurements. The consolidation process is modeled through the previously documented finite strain theory of consolidation which accounts for the large strains and nonlinear soil properties inherent in the very soft materials commonly found in maintenance dredgings. Pertinent equations necessary for process calculation are given. The mathematical model is next rewritten for computer solution through the computer program PCDDF. The model and computer solution are then tested through comparisons of predicted material settlements with measured settlements in three confined disposal areas. Appendices to the report include a detailed user's manual (Appendix A) for computer program PCDDF along with a program listing (Appendix B) and sample input and output data (Appendix C). Consolidation properties (Appendix D) and the design of a comprehensive field verification site (Appendix E) are also included.