الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 324 |  |  |
| | | from | 324 | | |
Abstract
To study the geotechnical behaviour of diaphrgam walls, the instrumentation of the greater Cairo Metro Project provideed the required field measurements. Two test sections were instrumented to observe and recrd the deformations of the soil, pore water pressures and loads acting on the structural elements (i.e. strts, rafts, and roof) due to the excavation and construction method. The first test section was along the running tunnel, an open air excavation using precast panel walls. The second, at a station, was a coveredexcavation, with cast in situ walls prviding lateral support. Afinite element analysis was conducted to compute the lateral earth presures as they can not be measured directly from the field. The use of a simplified plane fram model, run on a microcomputer(such as PFT), to quickly and economically calculated the latera;l earth pressures was verified.
The ground reaction characteristics below the groundwater level and a lateral earth pressure concept for diaphragm walls were established. The influence of the construction method, sequence of installation of the temporary and permanent support systems, and the wall thickness were studied for the host material of the Cairo area. As a result, detailed documentation for the Cairo Metro Regional line was provided.