الفهرس 
REVIEW AND ANALYSIS OF PUBLISHED DATA ON PERFORMANCE OF DEEP EXCAVATION SUPPORT SYSTEMS
Prefabricated diaphragm wallsOnly 14 pages are availabe for public view
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Abstract
Analysis of deep braced diaphragm walls subjected to sequential excavations
coupling with grouting processes to control hydrostatic pressure and seepage forces of
the groundwater outside the diaphragm walls is considered as one of the most
sophisticated soil-structure interaction problems. The cut-and-cover construction
technique for the construction of subway stations utilizing deep braced diaphragm walls
is considered as an effective method for controlling the ground subsidence associated
with the construction activities and ensuring the safety measures for the nearby
structures and utilities.
The main objective of the present study is to numerically evaluate the behavior
of a subway station constructed utilizing braced diaphragm walls through typical
Greater Cairo water-bearing alluvial deposits. Rod El-Farag subway station, which is
one of the Line 2 – of the Greater Cairo Metro, is used in the analysis of the proposed
model. Both the soil and the diaphragm walls were extensively instrumented during the
construction stages to report the ground subsidence around the station, as well as the
mode of diaphragm walls deformation.
2D and 3D finite element analyses were employed to simulate the different
stages of construction. The computed back-analyses of the both idealizations were
compared with the field measurements compiled during construction phases. Finally, a
parametric study concerning some of the important factors which affect the soildiaphragm
walls-construction
sequence interaction was conducted, and the results were
discussed.