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现场试桩是取得单桩极限荷载较为可靠的方法。然而,目前所应用单桃试验资料确定承载力的方法很多,特点各异,互不统一,且大都靠图解法完成,因而,带有一定的人为因素,造成选择时的困难,并影响应用试验成果的可靠性和精确度。本文分析了极限荷载点于试桩曲线上的性质,提出了以最大曲率评价及预测单桩极限承载力并导出了相应的计算公式。与国内外不同地区试桩资料的分析计算结果与实测的极限荷载值吻合良好。
On-site test piles are a reliable method for obtaining the ultimate load of a single pile. However, the current application of single peach test data to determine the carrying capacity of many methods, different characteristics, are not uniform, and most rely on graphical method to complete, therefore, with a certain human factors, resulting in difficulties in the selection, and affect the application of the test The reliability and accuracy of the results. This paper analyzes the properties of the ultimate load point on the test pile curve, and proposes the maximum curvature to evaluate and predict the ultimate bearing capacity of a single pile and derives the corresponding calculation formula. The analytical calculation results of the test piles in different regions at home and abroad are in good agreement with the measured ultimate load values.