Research On Key Technology Of TBM&EPB Double Mode Shield In Composite Formation

The geological conditions Nanjing area surrounding rock are complex,where is formed by soft and hard alternating complex formation, at the same time, the project airport section is longer,increasing the difficulty of construction.the construction difficulty further increas ed. Based on the theoretical analysis, numerical simulation and field test analysis, the doubl e-mode composite shield machine construction under the complicated geological conditions of this project has solved the difficulties in many constructions and formed a set of system c onstruction technology, Get the following results or conclusions:1) To assist the development of the TBM&EPB double mode shield machine;2) TBM&EPB mode conversion technology is formed;3) The best location for TBM&EPB conversion is determined;4) The minimum length of hard rock of EPB converted to TBM in mode conversion is determined;5) The complete construction technology of TBM&EPB double shield machine in composite stratum is formed and the rule of tool wear is summarized;6) The construction of shield non - stop construction is formed...