南通地区超长桩单桩竖向极限承载力标准值研究  

Study on Super-long Pile's Standard Value of Vertical Ultimate Bearing Capacity of Single Pile In Nantong

作　　者：王吉明[1] 

机构地区：[1]南通宝钢钢铁有限公司,南通226002

出　　处：《建筑监督检测与造价》2010年第Z1期19-24,共6页Supervision Test and Cost of Construction

摘　　要：制定规范所用的桩基参考资料基本为短桩和长桩的试验资料,规范中单桥静力触探计算预制桩竖向极限承载力标准值方法采用桩基资料275根,桩长大于50m的桩仅3根,占总桩数的1.1%,其中最大桩径为550mm。在南通地区能不能采用规范进行桩长大于50m,桩径超过550mm的超长桩单桩极限承载力标准值计算,桩径大小对桩侧摩阻力的取值有没有影响,计算结果的准确性如何?本文通过对三种桩径的9根超长桩单桩极限承载力标准值的计算结果与现场竖向静载荷试验结果进行对比分析,总结了南通地区使用规范计算超长桩单桩极限承载力标准值的几点经验,为今后类似超长桩工程设计提供参考资料。The references of formulating standard basically are long and short piles' test materials,and the standard said the method using single bridge cone penetration test to calculate pre-cast pile's standard value of vertical ultimate bearing capacity needs 275 piles,the number of piles' length longer than 50m is just 3,about 1.1% of the all,the biggest pile diameter is 550mm.If the length of piles is longer than 50m,pile diameter is more than 550mm in Nantong,whether the standard can be used to analyze super-long pile's standard value of ultimate bearing capacity of single pile? Does the pile diameter affect the vale of side friction of the pile? And what about the accuracy of the calculation result? The paper compared and analyzed the calculation result of 3 kinds of piles,9 super-long piles' standard value of ultimate bearing capacity of single pile to field vertical loading tests',and summarized several experiences using the standard to calculate super-long pile's standard value of bearing capacity of single pile in Nanton,in order to support some references to the design of super-long piles.

关 键 词：超长桩 单桩竖向极限承载力标准值 

分 类 号：TU473.1[建筑科学—结构工程]