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本文是结合港口桩基工程规范的编制工作,在调查研究和模型试验的基础上提出的一份研究报告.文中对群桩的工作特性、破坏机理和承载力的计算方法进行了比较深入的分析,並根据不同情况提出了按整体破坏和刺入破坏(单个桩破坏)的计算方法.在试验的基础上,通过理论推导,求得了适用于高桩式群桩按刺入破坏计算承载力的方法,弥补了Converse-Labarre等公式未考虑桩长和土质对群桩承载力影响的缺陷.用本文推荐的方法所得的计算结果不仅接近于原型和模型试验,而且也比波兰桩基规范(1969年)更符合实际,研究成果已列入我国港口桩基工程规范(198j年).
This paper is a research report based on the compilation work of the port pile foundation engineering specification, based on investigation and research and model tests. The paper has carried out a comparatively in-depth analysis of the working characteristics, failure mechanism and calculation method of bearing capacity of pile group. , According to different circumstances, a calculation method based on the overall destruction and piercing damage (individual pile failure) was proposed. Based on the experiments, theoretical calculations were carried out to determine the calculation of bearing capacity suitable for piercing failure of high pile group piles. The method compensated for the inconsistency of the effect of pile length and soil quality on the bearing capacity of the pile group. The calculation results obtained by the method recommended in this paper were not only close to the prototype and model tests, but also better than the Polish pile foundation specifications (1969). (year) is more in line with reality, research results have been included in China’s port pile foundation engineering standards (198j years).