Abstract：
The fact of large-diameter slurry shield construction related to problems of high ground losses (causedby low cutting face pressures and high grouting pressures) is not sufficiently considered in transverse settlement trough theory. Therefore, a modified formula for the GAP parameter is proposed. Using the construction of the Chengjiang west road river-crossing tunnel in Jiangyin City as an example, a modified GAP parameter was incorporated into the modified Peck formula and the analytical solution based on the Sagseta theory in order to study the influence of large-diameter slurry shield construction on soft soil. It was verified that due to the equivalent ground losses caused by factors such as construction quality, under-pressure of the cutting face, and and high grouting pressures, calculated settlements are larger, but are more consistent with the measured data and more reasonable theoretically.
.On the Modification of the Ground Loss Parameter GAP for Large-Diameter Slurry Shield Tunnelling and its Application[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(5): 92-87
2013, Vol. 50 