高桩码头基桩竖向承载力原型试验研究

发布时间：2019-02-17 21:04

【摘要】：单桩承载力的检测已有较多成熟的方法。高桩码头的基桩作为整个高桩码头体系的一部分,上部存在复杂的结构,对于此类结构型式,现阶段尚没有有效的方法检测其承载力。结合实际工程,提出区域堆载法检测高桩码头现役基桩承载力的技术,该方法不破坏码头现有的结构。现场进行高桩码头基桩承载力原型试验,在分级荷载作用下测试码头整体变形变位、基桩沉降、结构构件应变等。同时建立数值模型,对高桩码头基桩承载力进行计算分析,利用试验结果对数值模型进行修正,用修正后的数学模型对原型试验的全过程进行数值模拟,对比分析数值计算与试验结果表明,两者吻合较好。经综合分析,最终确定高桩码头基桩的竖向承载力可以达到1 400kN,码头结构处于安全状态,其结果为码头改造的方案设计提供了试验依据。
[Abstract]:There are many mature methods to measure the bearing capacity of single pile. The foundation pile of high pile wharf is a part of the whole system of high pile wharf, and there are complex structures in the upper part. There is no effective method to measure the bearing capacity of this kind of structure at present. Combined with the actual engineering, the paper puts forward the technique of measuring the bearing capacity of existing foundation piles of high pile wharf by regional surcharge method, which does not destroy the existing structure of the wharf. The prototype test of bearing capacity of foundation pile of high pile wharf was carried out on the spot. The deformation displacement settlement of foundation pile and strain of structural member were tested under the action of graded load. At the same time, the numerical model is established to calculate and analyze the bearing capacity of the pile foundation of the high pile wharf, the numerical model is modified by the test results, and the whole process of the prototype test is simulated with the modified mathematical model. The numerical calculation and experimental results show that the two are in good agreement with each other. Through comprehensive analysis, the vertical bearing capacity of pile foundation can reach 1 400kN, and the structure of wharf is in a safe state. The results provide experimental basis for the scheme design of wharf reconstruction.
【作者单位】：交通运输部天津水运工程科学研究所水工构造物检测、诊断与加固技术交通行业重点实验室;
【分类号】：U656.1;U655.55

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