GROUND MOVEMENT PREDICTION FOR DEEP EXCAVATIONS IN SOFT CLAY
A series of numerical experiments were conducted using nonlinear finite-element analyses to investigate the effects of wall embedment depth, support conditions, and stress history profile on the undrained deformations around a braced diaphragm wall in a deep clay deposit. A comprehensive effective stress soil model (MIT-E3) is used in the analyses to describe important aspects of clay behavior, including small-strain nonlinearity and anisotropic stress-strain-strength, and to focus on soil profiles with constant overconsolidation ratio where the shear strength and stiffness are proportional to the depth. Results are compiled in prototype "design" charts to predict ground movements as functions of the excavation depth and support conditions. The design charts incorporate the effects of wall length on base stability. Similar methods are applied for a typical soil profile in Boston where a stiff overconsolidated crust conceals much softer clay. Findings demonstrate the importance of the underlying clay on estimated wall deflections and ground movements.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- HASHASH, YMA
- Whittle, A J
- Publication Date: 1996-6
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 474-486
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Serial:
- Journal of Geotechnical Engineering
- Volume: 122
- Issue Number: 6
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9410
Subject/Index Terms
- TRT Terms: Design charts; Effective stress; Excavation; Excavations; Experiments; Finite element method; Forecasting; Seismicity; Soft clays
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 00726087
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 21 1996 12:00AM