Open AccessInfluence of diaphragm wall installation in overconsolidated sandy clays on in situ stress disturbance and resulting wall deformations
Author(s) -
Andrzej Truty
Publication year - 2016
Publication title -
annals of warsaw university of life sciences-sggw. land reclamation
Language(s) - English
Resource type - Journals
eISSN - 2081-9617
pISSN - 1898-8857
DOI - 10.1515/sggw-2016-0019
Subject(s) - creep , geotechnical engineering , constitutive equation , stiffness , stress (linguistics) , subsoil , geology , cracking , computer simulation , structural engineering , diaphragm (acoustics) , engineering , materials science , finite element method , soil water , soil science , composite material , simulation , electrical engineering , loudspeaker , linguistics , philosophy
Numerical modeling of deep excavations becomes a standard practice in modern geotechnical engineering. A detailed numerical model for a given case is able to reproduce major effects of soil-structure interaction by taking into account any kind of drainage conditions, strong stiffness variation due to effective stress and strain changes, creep and cracking, when reinforced concrete is used as a structural material, but also interface effects between subsoil and structure. Calibrating soil constitutive models is one of the most difficult tasks and due to several sources of uncertainty there is no one unique set of the data that should be used in numerical predictions. Lack or incompleteness of experimental data, significant mismatch between laboratory and field tests is an another source of difficulty. Contrary to several simplified methods, that are usually limited to two dimensions, numerical models allow a full 3D analysis in which many simplifications can be eliminated. This paper is devoted to the problem of in situ stress disturbance caused by diaphragm wall installation in overconsolidated quaternary sandy clays and its influence on final wall deformations