TY - Journal of Yangtze River Scientific Research Institute A1 - WANG Shuai, SUN Shao-rui, SHU Yang, YUE Ling T1 - Critical Distance of Shallow Twin Tunnels and GroundSurface Settlements Caused by Tunneling Y1 - 2017-09-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 115 EP - 121 VL - 34 IS - 9 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20160521 ER -