Temporary support of excavation walls-case study

摘要

Various methods of temporary stabilization of soil excavations are used to support the excavationsrnwall. Soldier pile system and bored concrete piles are very versatile excavation retaining system for deeprnexcavations in urban areas surrounded by major structures and infrastructures provided that limiting lateralrndisplacements are not exceeded. In this study we have surveyed performance of various support systems thatrnapplied in excavations walls of entrance ramp of the Niayesh road tunnel project. These walls were supportedrnby soldier pile system reinforced by soil nails and Bored Pile system reinforced by anchors and struts elements.rnThe lateral deformations of walls were monitored parallel to the excavation progress from several target pointrnon the surface of the wall. Some Finite Element models were developed to analyze performance of the walls.rnThe analyses results were compared with monitored lateral deformations and performance and stability of eachrnsystem were compared with other systems.