Research on the Technology of Metro Shield Launching & Translation by Semi-cover Excavation Method
Semi-covered excavation method is one of the commonly construction techniques for subway station pit construction,which can effectively ensure the normal passage of ground traffic.But at the same time,it also causes the difficulty of shield launching.Relying on the construction of Yanshan Interchange East Station of Jinan Metro Line 4 in Shandong Province,the lifting & taken down the shaft,shield assembly and underground translation and other links of the shield and other large-scale equipment are analyzed;The construction steps of shield lifting and translation are summarized.The technical points of the laying and arrangement of the translation track are deter-mined.The force and bearing capacity of the translation bracket and the jacking cylinder are calculated.At the same time,risk factors are analyzed.The countermeasures are proposed in case of fall of shield machine from height dur-ing lifting,overturning of shield structure or mechanical injuries during translation.The proposed schme is of refer-ence significance for similar large-diameter shield launching construction.
国家科技期刊平台
NSTL
万方数据
