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贵州某水利枢纽工程为高大跨径渡槽,其结构恒载及运营期间水荷载很大,为确保渡槽结构的安全,为设计提供参考依据,对渡槽结构基桩采用自平衡法进行竖向承载能力试验。该文介绍了自平衡试桩法的基本原理及在该工程中应用的要点。通过自平衡法检测了试桩的实际承载力和桩侧摩阻力的分布,分析了该试桩承载力不足的原因,为该工程中类似桩的设计与施工提供参考,也为自平衡法在贵州地区的推广应用积累资料和经验。
In order to ensure the safety of aqueduct structure, a key hydro-junction project of Guizhou is a high-span aqueduct with constant structure load and large water load during operation. It provides a reference for design and carries the vertical bearing capacity of self-balance method for aqueduct pile test. This paper introduces the basic principle of self-balancing test-pile method and its application in this project. The self-balancing method was used to test the actual bearing capacity of the test pile and the distribution of friction on the pile side. The reasons for the insufficient bearing capacity of the pile were analyzed, which provided references for the design and construction of similar piles in the project. Guizhou area to promote the use of accumulated information and experience.