Abstract The construction of bored tunnels in water-rich sandy stratum is a difficult aspect of metro construction that often results in safety accidents due to significant settlement. Curtain grouting, horizontal jet grouting piles, and well-point dewatering were used during the tunnel driving between the Antuoshan and Qiaoxiang Stations, reducing settlement significantly. Tunnel construction followed the rules of "pipe-roof support, short advance, early enclosure and frequent measurement." This paper analyzes the causes of settlement and key techniques of settlement control as well as relative measures.
Abstract：
The construction of bored tunnels in water-rich sandy stratum is a difficult aspect of metro construction that often results in safety accidents due to significant settlement. Curtain grouting, horizontal jet grouting piles, and well-point dewatering were used during the tunnel driving between the Antuoshan and Qiaoxiang Stations, reducing settlement significantly. Tunnel construction followed the rules of "pipe-roof support, short advance, early enclosure and frequent measurement." This paper analyzes the causes of settlement and key techniques of settlement control as well as relative measures.
2012, Vol. 49 