桩承式加筋路堤土拱效应试验研究.pdfVIP

TU471 A 2007 (1969 ) E-mail: caowp@ zju.edu.cn Experimental investigation on soil arching in piled reinforced embankments CAO Wei-ping, CHEN Ren-peng, CHEN Yun-min (Institute of Geotechnical Engineering , Zhejiang University, Hangzhou 310027, China) Abstract:There was significant influence of soil arching on behaviors of piled reinforced embankments. The stress ratio between pile and soil was an important parameter to assess soil arching. Model tests were carried out to investigate the influence of relative displacement between pile and soil, embankment height, width and clear spacing of cap-beam, and geotextile on pile-soil stress ratio and settlements of the embankments. It was shown that: Pile-soil stress ratio varied with the relative displacement between pile and soil until some upper and lower bound values. Higher ratio of embankment height to cap-beam clear spacing as well as higher ratio of cap-beam width to clear spacing would result in higher pile-soil stress ratio. The inclusion of geotextile would increase pile-soil stress ratio, the higher the geotextile tensile strength, the higher the stress ratio. When the ratio of embankment height to cap-beam