STUDY OF THE EFFECT OF FLUCTUATION OF THE FUNDAMENTAL SOIL PARAMETERS ON GROUND MOVEMENTS INDUCED BY TUNNEL CONSTRUCTION

Tunnel construction remain a challenging engineering project, even with the foremost progress in tunnel boring technology & tunnel design and one of the main problems from geotechnical point of view, is the intrinsic complexity and heterogeneity of soil.Indeed, tunnel design requires an excellent knowledge of soil characteristics. But it's not possible to identify the soil parameters at each pointOn the other hand, the results obtained indicate that, the settlement is more sensitive to cohesion compared to friction angle, but in term of horizontal displacements the two parameters have the same effect