Foundation Treatment Exper imental Study of Canal Head Sluice in Xinjiang Yarkant River Basin ZHU Feng2jun, L IL ian2xi ( Test Institute of Xinjiang W ater Resources and Hydropower Investigation, Changji 831100, China) Abstract: The Xinjiang Yarkant R iver basin is located at Tarim basin’s west edge. The supporting layer of the sluice is the powder sands. The structure of the sluice ground is char