4.3. Scoping of the safety risk areas
By directly fitting the data with the proposed double peak Gaussian
model, the ground disturbance induced by each tunnel could be more
exactly represented. Recalling Eq. (1) the characteristics of Gaussian
curve, i is a vital parameter which determines the flatness of the
curve. The larger the value of i, the wider the settlement trough on
the ground. Therefore, the former is also defined as a trough width