Abstract: Aiming at the thick moraine soil layer at Luding Dadu River Bridge on Ya'an-Kangding expressway, the static load tests on 7 model piles are carried out in the field surface and experimental adit, the horizontal force-displacement relations are analyzed. the proportional coefficient of horizontal resistance coefficient of the moraine soil m is studied. The vertical compressive static load tests on 1 model pile are carried out in the experimental adit, and the ultimate bearing capacity is obtained.