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根据同一场地不同施工工艺的灌注桩静载试验和应力测试结果,分析了桩端附近侧摩阻力强化弱化效应,得出桩侧摩阻力随着桩端持力层强度和刚度而变化的一些规律特点。通过异常桩大位移量静载试验结果,定性分析了异常桩的弱化效应、强化效应以及从弱化效应转化为强化效应的产生机理,进一步认识桩侧摩阻力为非定值,对灌注桩合理设计、施工和加固处理异常桩有一定指导意义。
According to the static load test and stress test results of bored piles with different construction techniques in the same site, the strengthening and weakening effects of side friction near the pile tip are analyzed, and some laws of pile friction with the strength and stiffness of the bearing layer are obtained Features. Based on the results of static load test of large displacements of abnormal piles, the weakening effect and strengthening effect of abnormal piles and the generation mechanism of the strengthening effect from the weakening effect are qualitatively analyzed. The frictional resistance of the pile side is further recognized as a non-fixed value, , Construction and reinforcement of abnormal pile has some guiding significance.