EFFECT OF A DRIVEN PILE ON AN EXISTING TUNNEL

Abstract

It is essential to measure the response of existing tunnel-lining due to newly constructed pile to assess the safety against the additional forces/moment caused by pile driving and loading and to evaluate the critical distance for the proposed construction of any structures from the tunnel location. This study presents an experimental work to investigate the effects of driven pile during insertion and loading on existing tunnel embedded in the sandy soil. It is found that the effects of driving and loading of pile on stresses transfer to tunnel depend on the horizontal separation distance between pile’s tip and tunnel, and the stresses generated due to the loading of a pile is higher than the stresses during construction period furthermore the ultimate bearing capacity of pile increased due to the presence of tunnel.

Keywords

• pile
• tunnel
• stress
• sand