卵石土地层桩侧摩阻力确定方法研究

Research on the Side Friction of the Pile in Pebble Foundations

桩基承载力的确定与计算其所需的地基土层土工参数和原位测试参数关系密切,规范中只给出了取值原则,不涉及具体的方法。在此,以太原某工程桩基设计为研究对象,立足该场地工程地质条件,选择合适的土工参数,对卵石土地基桩侧摩阻力标准值取值进行了讨论和分析,进而预估了桩的抗拔承载力,并利用抗拔静载试验验证了预估结果的正确性,从而缩短了工期,降低了成本。

The bearing capacity of piles is close to the geotechnical parameters or in-situ testing parameters of strata. However, only rule of value determination is provided in code, which has nothing to do with specific methods. Therefore, a pile design project in Taiyuan is selected to study this problem. Combining with the engineering geological conditions and choosing various geotechnical parameters, nominal values of side friction and the tension capacity of the pile are discussed and estimated in pebble foundations. The estimated values are reasonable and correct by the static loading test. The time limit of the project is shortened and the construction cost is reduced.