Evaluationof behavior of diaphragm walls in deep excavations with cross-walls as base struts | |
| Author | Chanaka, Hewa Garusinghe Dapana Dimal |
| Call Number | AIT Thesis no.GE-10-02 |
| Subject(s) | Evacation--Evaluation--Simulation methods Walls--Evaluation--Simulation methods Subsoils--Evaluation--Simulation methods |
| Note | A thesis submitted in partial fulfillment of the requirements for the ยท Degree of Master of Engineering in Geotechnical and Geo-environmental Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-10-02 |
| Abstract | There is a tendency to use cross walls as base strut in deep excavation in cities with soft sub soil profiles. Some countries need cross walls for each diaphragm wall panels, but cross wall can even bear load from two panels. Hence the study is based on diaphragm wall response in omitting a cross wall from base strut in soft soil deep excavation is evaluated by PLAXIS 2D and PLAXIS 3D FOUNDATION finite element program. Mohr Coulomb soil model is used to model the soil behavior. Horizontal sections at excavation bottom are modeled in PLAXIS 2D for different cross wall arrangements. These models are analyzed for three different joint strengths, three excavation depths and three loading conditions. The excavation depth shows predominant influence to bending moment and stresses induced in diaphragm wall and also joint shape shows a considerable influence on induced stresses in diaphragm wall. One cross wall supported for every three panels is not possible even in 6m excavation depth, but one cross wall supported for every two panel is possible for shallower depth with several modification of the wall according to the bending moment and shear forces. According to the 3D simulations, basal heave is not critical in alternative panels supported. |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-10-02 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-wej; |
| Examination Committee(s) | Bergado, Dennes T;Park, Kyung-Ho.; |
| Scholarship Donor(s) | Asian Institute of Technology fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2011 |