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本文通过对同一工程的基桩竖向抗压承载力的高应变法测试和静载试验结果的分析,指出工程基础的设计选型和施工工艺的选取应充分考虑场地特殊地质条件的影响,计算取值应是成桩后实际状态的合理取值,否则设计错误,造成工程损失。本文同时也指出了在检测过程中应注意检测方法的选择问题,对Q-s曲线呈现缓变型的摩擦灌注桩不适宜用高应变法检测,特别是出现单击贯入度大,桩底同向反射峰明显而且肥大时,不可用常规的桩—土模型进行计算分析;对于桩身或(和)桩端位于遇水易软化层的摩擦桩,静载荷试验适宜采用慢速维持荷载法,快速维持荷载法可能会得出错误的结论。
Based on the analysis of the high strain method and static load test results of vertical compressive bearing capacity of foundation pile in the same project, it is pointed out that the design selection of construction foundation and the selection of construction technology should fully consider the influence of the special geologic conditions of the site and calculate The value should be a reasonable value of the pile after the actual state, otherwise the design error, resulting in project losses. In the meantime, this paper also points out that the choice of testing methods should be noticed in the testing process. It is not suitable for high-strain method to test the graded QS curves. In particular, When the peak is obvious and hypertrophy, the conventional pile-soil model can not be used for calculation and analysis. For the static friction pile with pile body or end pile located in the water-softening layer, it is appropriate to adopt the slow maintenance load method to maintain quickly The load method may yield the wrong conclusion.