大直径超长桩溜桩桩端阻力的计算方法

发布时间：2018-06-26 01:40

  本文选题：沉桩 + 溜桩　； 参考：《岩土工程学报》2017年S2期

【摘要】：随着超大直径单桩基础在海洋工程中的广泛应用,在超大的桩锤重量作用下,使得沉桩过程中溜桩现象频发。工程经验表明,溜桩过程中,桩侧摩阻力的发挥程度很小,所以对溜桩区间的判断主要取决于对桩端阻力的评估。溜桩现象主要发生在黏性土层中,因此以对黏性土层桩端阻力的计算是至关重要的。针对某平台桩基沉桩过程中的溜桩问题进行了分析计算,比较黏性土层中桩端阻力的计算方法,提出计算溜桩问题中的黏土桩端阻力的方法并验证了其合理性,可供桩基设计以及沉桩施工参考。
[Abstract]:With the wide application of super-large diameter single pile foundation in ocean engineering, the pile-slip phenomenon occurs frequently in the process of piling under the action of super-large pile hammer. The engineering experience shows that the exertion degree of friction on the side of the pile is very small in the course of pile slide, so the judgment of the slip pile section mainly depends on the evaluation of the resistance of the pile tip. The phenomenon of pile slip occurs mainly in the clay soil, so it is very important to calculate the pile tip resistance in the viscous soil layer. This paper analyzes and calculates the pile slip problem in the course of piling on a certain platform, compares the calculation method of the pile tip resistance in the clay soil layer, puts forward the method of calculating the pile tip resistance in the pile slide problem and verifies its rationality. It can be used as a reference for pile foundation design and piling construction.
【作者单位】： 华电重工股份有限公司;天津市软土特性与工程环境重点实验室;天津大学建筑工程学院;
【基金】：国家自然科学基金项目(51279127,41372291) 天津市科技计划项目(15JCZDJC40600,15ZCZDSF00220)
【分类号】：P75;TU473.1
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本文编号：2068485