STUDY OF TUNNELLING EFFECTS ON LATERAL BEHAVIOR UNDERGROUND BUILDING

Civil Engineering

The issue of interaction between tunnel and adjacent structures is of major research for tunnelling in metro cities, because of the high interaction between tunnelling and existing structural components of building. A foremost problem during the planning and execution of underground construction is the influence of construction related ground movements on adjacent structural components of building. During excavation and support of tunnels and open-cuts, changes in the state of stress in the ground mass around the excavation and loss of ground occur. These deviations in stress and ground losses are normally expressed in the form of vertical and horizontal ground movements. The ground movements, in turn, will cause any structures supported by the affected ground to translate, rotate, deform, distort, and possibly sustain damage. As a result, important tasks facing both the engineer and the contractor are the estimation of the magnitude and distribution of the ground movements to be caused by the construction procedures and the tolerance of the structures and utilities to the deformations and distortions sustained as a result of the ground displacements.

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