Abstract:

The construction schedule is greatly affected due to the jamming of the doubleshield TBM in the construction of the water diversion tunnel in unfavorable geology conditions. The causes for 3 common types of jamming of doubleshield TBM in the construction of the water diversion tunnel of DatongheHuangshuihe Water Transfer Project in unfavorable geology conditions are summarized and analyzed, 5 types of jam releasing technologies are proposed and countermeasures are adviced to prevent jamming of doubleshield TBMs. In the end, the jamming has been successfully released, due to the application of these technologies.

Key words: water diversion tunnel, doubleshield TBM, jamming, jam releasing, water diversion tunnel, unfavorable geology condition