Abstract:

The phenomenon of surface settlement in the construction of underground works with a small tunneling machine is one of the problems that prolongs construction time and increases construction costs. Settlements associated include two types: large settlements and systematic settlements. Large settlements occur primarily because of loss of ground due to over-excavation. Systematic settlements associated with trenchless construction are primarily caused by the collapse of the overcut, or annular space, between the new pipe and the excavation. Therefore, within study presents risk assessment and management of settlement in order to improve the effectiveness during pipe jacking construction