5Cavill B A. Very high capacity ground anchors used in strengthening concrete gravity dam[A]. In:Proc. Ground Anchorages and Anchored Structures[C]. London:Thomas Telford,1997. 101-113.
6Massarsch K R,Oikawa K. Design and practical application of soil anchors[A]. In:Proc. Ground Anchorages and Anchored Structures[C]. London:Thomas Telford,1997. 153-158.