Abstract Drill and blast construction of the metro station in urban areas has large effect and even damage on sur? rounding buildings and personnel. Taking the drill and blast excavation of the Honghu East Road station of Chongqing rail transit loop line as an example, the blasting scheme and design parameters were described in detail, main technical measures of partial excavation, three-stage wedge-shaped cut, pre-splitting blasting and hole-by-hole initiating network were taken in order to reduce effects of ground settlement and blasting vibration on surroundings to the maximum extent. Practice shows that the comprehensive technical measures for construction of the metro station can significantly reduce the blasting vibration and disturbance of surrounding rock, guaranteeing the safety of surrounding buildings and personnel.
Abstract：
Drill and blast construction of the metro station in urban areas has large effect and even damage on sur? rounding buildings and personnel. Taking the drill and blast excavation of the Honghu East Road station of Chongqing rail transit loop line as an example, the blasting scheme and design parameters were described in detail, main technical measures of partial excavation, three-stage wedge-shaped cut, pre-splitting blasting and hole-by-hole initiating network were taken in order to reduce effects of ground settlement and blasting vibration on surroundings to the maximum extent. Practice shows that the comprehensive technical measures for construction of the metro station can significantly reduce the blasting vibration and disturbance of surrounding rock, guaranteeing the safety of surrounding buildings and personnel.
2019, Vol. 56 