Natural ground characteristics of the heading front due to the criteria where the natural ground evaluation method in

摘要

PROBLEM TO BE SOLVED: To enable natural ground evaluation based on advancing boring survey and TBM data, and evaluate the natural ground properties at high accuracy with the latest information. ;SOLUTION: A tunnel boring system is provided with a full section tunnel boring machine(TBM) and advancing boring equipment installed in the TBM. The system is provided with a first evaluating means to evaluate the natural ground properties forward of a cutting face based on the advancing boring survey, a second evaluating means to evaluate the natural ground properties by the cutting face from the TBM data, and a feedback means to feed back the result of the second evaluating means to the evaluation standards of the first evaluating means.;COPYRIGHT: (C)1999,JPO