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针对本地灌注桩抗拔力检测不合格率较高的现状,本文将近三年的受检桩按单位工程、桩型、桩径及单桩承载力、上拔位移等作出统计,分析其分布规律和不合格率;通过对2015年全部抗拔试验实测数据的计算和统计分析,得出嵌入硬质岩和软质岩泥浆护壁灌注桩嵌岩段抗拔综合系数、非嵌岩桩强风化段抗拔系数;探讨挖孔桩的承载力和上拔位移分布;给出若干建议供设计施工参考。
In view of the current situation of high failure rate of local bored pile test, the distribution of the tested pile in unit project, pile type, pile diameter, single-pile bearing capacity and uplift displacement are statistically analyzed in this paper. Through the calculation and statistical analysis of the measured data of all the anti-pullout tests in 2015, it is concluded that the integrated coefficient of anti-pull-up of embedded rock piles filled with hard rock and soft rock slurry and the strong weathering section Anti-pull coefficient; explore the digging pile bearing capacity and uplift displacement distribution; give a number of suggestions for the design and construction reference.