Case Study - Performance of Diaphragm Walls During Construction; Predictions vs. Field Measurements

by Abdol R. Haghayeghi, (M.ASCE), Weidlinger Associates, Inc, Cambridge, United States,
Mehrdad Mirzakashani, Weidlinger Associates, Inc, Cambridge, United States,

Document Type: Proceeding Paper

Part of: Structures Congress XII


Rigid diaphragm walls (slurry walls) are being used more than any other earth supporting system for underground construction projects in confined downtown sites throughout the United States and Europe. These walls typically demonstrate smaller lateral wall movements than other excavation support systems, minimizing the risk of excessive settlement in adjacent existing structures. Reliable prediction of lateral wall movements is not always easy or possible. Current techniques available for modeling the soil/structure interaction for slurry walls include the following: Continuous beam with roller supports (rigid supports). Continuous beam on elastic foundation (spring supports) Finite element model of the soil/structure interaction. This paper examines the behavior of the rigid diaphragm walls installed in a recent underground construction project in downtown Boston, using the beam on elastic foundation method of analysis.

Subject Headings: Underground construction | Diaphragm walls | Finite element method | Elastic foundations | Construction sites | Construction methods | Underground structures | United States | Europe | Boston | Massachusetts

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