Stress Paths in Relation to Deep Excavations
- 1 May 1999
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical and Geoenvironmental Engineering
- Vol. 125 (5) , 357-363
- https://doi.org/10.1061/(asce)1090-0241(1999)125:5(357)
Abstract
The mechanical behavior of many soils such as stiff clays depends on their current effective-stress states and stress history. For improving design and analysis of soil-structure interaction associated with deep excavations in these soils, it is important to understand effective-stress changes around excavations caused by both horizontal and vertical stress relief. In this paper, total and effective-stress variations adjacent to a diaphragm wall during construction of a 10-m-deep excavation in stiff fissured clay are reported and discussed. Interpreted field stress paths are compared with some relevant laboratory triaxial stress path tests, which simulate the horizontal and vertical stress relief in the field at an appropriate stress level. The interpreted field effective-stress paths in front of the wall are found to be similar to laboratory stress paths determined in undrained extension tests. Field stress paths behind the wall do not correspond particularly well with those from laboratory undrained com...Keywords
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