Abstract:

Comparative study of the model using geotechnical centrifuge for rail pile and anchor combined gravity retaining wall supporting soil slope are carried out respectively. The key roles of rail pile and anchor in the gravity-type retaining wall supporting soil slope are analyzed. The results show that the sliding deformation of soil slope supporting with gravity retaining wall is induced by heavy rainfall, threatening the stability of the slope. The rail pile which is nailed into foundation and retaining wall could reduced the wall offset greatly due to rainfall; but the local shallow slide at the top of the wall of the upper slope is inevitable. The anchor which is implanted in the upper slope and top of the wall can be inhibited the shallow slip on the slope. Without increasing weight, the ability of wall anti-overturning and shallow anti-slump are increased by the extension role of rail piles and anchoring role of the anchor the retaining wall under the premise of the next extension of the role of rail piles and retaining wall anchoring role of the anchor. The supporting effect of gravity retaining wall is improved from the slope of deep and shallow at the same time. Another the earth pressure of the retaining wall back is uniformed by using rail piles and anchor; the local stress concentration is avoided effectively.

Key words: pile-anchor combined retaining wall, soil slope, centrifugal modeling test, deformation