GROUND MOVEMENTS DUE TO EXCAVATION WITH LATERAL SUPPORTING SYSTEMS

摘要

The control of ground movements is one of the most critical restraints in modem shoring design, especially when the excavation is carried out in vicinity of buildings, utilities and tunnels. In this study, several lateral supporting systems are investigated, with an effort to identify the key factors contributing to ground movements. It is shown that the ground movement is sensitive to the excavation depth and ground conditions, yet seems to be relatively less sensitive to the wall and strut stiffness. It is also noted that the location of the first layer of strut can be critical to the wall deflection, and an optimum strut arrangement can be achieved to minimize the wall deflection and subsequently the ground movement.