黄河中下游冲积平原深长桩承载能力试验研究  

Test study on the bearing capacity of long piles on the alluvial plain in the middle and lower reaches of the Huanghe River

作　　者：雷自学[1] 屈尚文[1] 白青侠[2] 杨雨后[2] 

机构地区：[1]长安大学建筑工程学院,西安710064 [2]长安大学公路学院,西安710064

出　　处：《建筑结构》2011年第5期98-100,114,共4页Building Structure

摘　　要：介绍了处于黄河中下游冲积平原的郑州黄河公铁两用桥深长桩基承载力测试的传统静载荷试桩法。分析了大量的实测数据及相应的Q-s曲线,并将实测结果与规范方法所得结果进行了比较。结果表明:实测桩的承载力小于相应规范值,前者约为后者的74%;实测桩侧摩阻力与相应规范值基本相当,而实测桩端阻力远小于相应规范值,前者约为后者的20%;桩侧阻力先于桩端阻力的发挥,桩的沉降量主要是桩身压缩量。Conventional static loading method for long piles adopted in Zhengzhou Road-rail Bridge on the alluvial plain in the middle and lower reaches of the Huanghe River was introduced.Lots of data measured and the corresponding Q-s curves were analyzed,compared the test results with those obtained by the method in the code.The test results show that the bearing capacity obtained in the test is less than that calculated according to the code,and the former is about 74% of the latter.The side friction measured is approximately the same as that calculated with the formula in the code,whereas the pile tip resistance is much smaller than that in the code,and the former is about 20% of the latter.The side friction is mobilized earlier than the tip resistance and the pile settlement is mainly the compression of pile shaft compression.

关 键 词：冲积平原 深长桩 静载试验 承载力 

分 类 号：TU473.1[建筑科学—结构工程]