Abstract Based on the construction practice of a large-diameter EPB shield first adopted for Beijing Metro Line 14, the building settlement induced by shield tunneling is predictied by numerical simulation and a comparative analysis of predicted and measured data is carried out. The results show that: the settlement and inclination of buildings are within control standards and the design and construction scheme is feasible; the settlement at the shield tail is 30% to 50% of the maximum settlement and it is a critical factor to control; the grouting via the embedded pipes on the ground is an effective auxiliary measure to control settlement; the key points to control settlement during shield construction include improvement of the plastic flow properties of the soil mass, control of driving parameters, extracted muck volume, simultaneous grouting at the shield tail, and secondary grouting.
Abstract：
Based on the construction practice of a large-diameter EPB shield first adopted for Beijing Metro Line 14, the building settlement induced by shield tunneling is predictied by numerical simulation and a comparative analysis of predicted and measured data is carried out. The results show that: the settlement and inclination of buildings are within control standards and the design and construction scheme is feasible; the settlement at the shield tail is 30% to 50% of the maximum settlement and it is a critical factor to control; the grouting via the embedded pipes on the ground is an effective auxiliary measure to control settlement; the key points to control settlement during shield construction include improvement of the plastic flow properties of the soil mass, control of driving parameters, extracted muck volume, simultaneous grouting at the shield tail, and secondary grouting.
SUN Chang-Jun-1,
3 ,
ZHANG Ding-Li-1 etc
.Prediction and Control Techniques for Building Settlement Induced by Large-Diameter EPB Shield Tunnelling[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(1): 136-142
2015, Vol. 52 