摘要
在地基表层铺设约1．5m厚砾石砂替换耕植土后，对3根带承台摩擦单桩进行荷载传递特性试验．承台尺寸分别为1．25，1．50，1．75m，桩长分别为10，17，25m．得到了各种桩-承台-地基共同作用特性的观测成果．3个试验结果表明：承台荷载分担比随总荷载的增加而增大，最终均分担了50％以上的荷载；桩长不同的复合桩基，通过调整承台平面尺寸或桩距，可以使平均地基刚度接近；带承台单桩的上部摩阻力传递函数均近似于弹塑性关系，极限位移只有1-2mm．
After 1.5 m thick gravelly sand is paved on the top of natural ground to replace the agricultural soil, load transfer tests of three single capped friction piles are conducted. The cap breadth is 1.25 m, 1.50 m and 1.75 m respectively. The pile length is 10 m, 17 m and 25 m respectively. The characteristics of load on pile top and soil pressure changed with the total load. The characteristics of cap-pile-soil interaction were observed. The three tests show that the ratio of load carried by cap rises with the increase of the total load, which is over fifty percent. The rigidity of capped piles of different length is close to each other by adjusting the cap＇s breadth. Load transfer function on upper pile shaft under caps is all similar of elastic-plastic relation, of which limit displacement is less than 2 mm.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第1期15-20,共6页
Journal of Tongji University:Natural Science
