... of many tunnel construction projects. This database contains field data from the tunnel construction sites all over Japan, includes a variety of heavy weight roadheaders of different geotechnical conditions and different cutter head type. And, this database refers to accurate estimation of the production...

... equation in curved jacking, more research and field data are needed. . From this point of view, the purpose of this paper. is 10 diSCUSS the prediction equation in order to better explain the Characteristics of the thrust and the friction resistance in curved jacking by using laboratory testing and field...