Abstract The prediction of ground settlement induced by a shield passing under sensitive buildings is an urgent problem to be solved in shield construction. Using the construction of an extra-large diameter shield passing under sensitive buildings as an example, and based on ground loss theory, a relationship between ground settlement and the ground loss ratio is established by the empirical-analytic method. The ground settlements under different ground loss ratios and the magnitudes of settlement under different distances to the center line and different ground loss ratios are calculated with the Peck formula. Additionally, using the Attewell formula and the Liu Jianhang formula, the longitudinal ground settlements under different driving distances and different ground loss ratios, as well as the longitudinal ground settlements under different driving distances and the common ground loss ratio, are calculated respectively. The calculation results are verified in comparison with the measured ones. The results show that the empirical-analytic model can accurately predict ground settlement; all the maximum ground settlements induced by shield driving just emerge at the tunnel central axis, increasing with the increment of ground loss ratio; and under the same ground loss ratio, the further the distance from the tunnel axis, the smaller the ground settlement is.
Abstract：
The prediction of ground settlement induced by a shield passing under sensitive buildings is an urgent problem to be solved in shield construction. Using the construction of an extra-large diameter shield passing under sensitive buildings as an example, and based on ground loss theory, a relationship between ground settlement and the ground loss ratio is established by the empirical-analytic method. The ground settlements under different ground loss ratios and the magnitudes of settlement under different distances to the center line and different ground loss ratios are calculated with the Peck formula. Additionally, using the Attewell formula and the Liu Jianhang formula, the longitudinal ground settlements under different driving distances and different ground loss ratios, as well as the longitudinal ground settlements under different driving distances and the common ground loss ratio, are calculated respectively. The calculation results are verified in comparison with the measured ones. The results show that the empirical-analytic model can accurately predict ground settlement; all the maximum ground settlements induced by shield driving just emerge at the tunnel central axis, increasing with the increment of ground loss ratio; and under the same ground loss ratio, the further the distance from the tunnel axis, the smaller the ground settlement is.
.Prediction of Ground Settlement Induced by an Extra-Large Diameter Shield Passing Under Sensitive Buildings[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(5): 98-104
2013, Vol. 50 