Study on the Planning Technology for Metro Built by Double Shield TBM in Old Urban Area
（1 China Railway First Survey and Design Institute Group Ltd., Xi′an 710043；2 Shaanxi Key Laboratory of Railway and Underground Traffic Engineering, Xi′an 710043）
Abstract：
The Qingdao metro line 2 is located in the old urban area with narrow boundary line of roads and short? age of construction land. With the double shield TBM, it′s necessary to solve the technical difficulties such as mutual interference between TBM excavation and station construction, TBM launching, TBM passing through station,TBM receiving and so on. In light of the environmental characteristics of Qingdao old urban area and the conditions of subway line and stations, the basic principles of project planning were presented; based on a study of TBM launching schemes, the technology of TBM launching from "rail row shaft + hoisting shaft +launching tunnel" was presented; by studying the schemes of TBM passing through station, the station crossing technologies of "station crossing of whole TBM by a curved guidance pedestal " and " station passing of TBM by pilot tunnel " were proposed; on the basis of a study on TBM receiving schemes, the technology of TBM disassembling and hoisting out from "rail siding tunnel + station air shaft " was put forward, and a comprehensive engineering planning technology of double shield TBM suitable for the metro construction in old urban area was summarized and applied in practice.
HUANG Yinding1,
2
.Study on the Planning Technology for Metro Built by Double Shield TBM in Old Urban Area[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(3): 38-44
2019, Vol. 56 