桩间距和桩帽宽度影响土拱效应的现场试验

发布时间：2018-07-31 17:23

【摘要】：为了研究桩间距和桩帽宽度对桩承式加筋路堤土拱效应的影响,在广清高速公路拓宽工程庆丰收费站进行了现场试验,实测了路堤荷载下不同桩间距和桩帽宽度下桩帽及桩间土表面的竖向土压力,据此获得土拱高度与桩帽净距的关系.试验结果表明,桩间土表面竖向应力近似均匀分布.当桩帽净距数值超过1.0m以后,土拱高度随桩帽净距的增加而减小.桩帽-土应力比随路堤荷载的增加而增大,随桩帽宽度和桩间距的增加而减小.桩帽荷载分担比随路堤荷载和桩帽宽度的增加而增大,随桩间距的增加而减小.桩间土荷载分担比随路堤荷载和桩帽宽度的增加而减小,随桩间距的增加而增大.
[Abstract]:In order to study the influence of pile spacing and pile cap width on soil arch effect of pile-supported reinforced embankment, a field test was carried out at Qingfeng toll station of Guangqing Expressway widening Project. The vertical earth pressure of pile cap and soil surface between piles under different pile spacing and pile cap width under embankment load is measured and the relationship between soil arch height and net distance of pile cap is obtained. The experimental results show that the vertical stress distribution on the soil surface between piles is approximately uniform. When the net distance of the pile cap exceeds 1.0 m, the soil arch height decreases with the increase of the net distance of the pile cap. The ratio of pile cap to soil stress increases with the increase of embankment load and decreases with the increase of pile cap width and pile spacing. The load-sharing ratio of pile cap increases with the increase of embankment load and the width of pile cap, and decreases with the increase of pile spacing. The load-sharing ratio between piles decreases with the increase of embankment load and pile cap width, and increases with the increase of pile spacing.
【作者单位】：上海理工大学环境与建筑学院;河海大学土木与交通学院;
【基金】：广东省交通运输厅科技项目(201102021) 上海理工大学国家级项目培育计划(16HJPY-MSO3)
【分类号】：U213.1;U416.1

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