Design new ideas and engineering practice of high-pressure water-rich fault "outside block and inside strenghthen grouting"

With the construction of the Through-street Tunnel under the Binhai Avenue as a practical example,this article describes the construction technology for tunnels crossing water-rich sand stratum.

It is difficult for mined tunnel with shallow cover to cross water-rich sand stratum.

The injecting reinforcement technique of sandy gravels watery strata;