基于AHP-Fuzzy的大直径管粧溜粧风险评估方法研究

Study on Risk Assessment of Pile Running for Large Diameter PilesBased on AHP-Fuzzy Method

大直径管桩在海洋工程中应用广泛,但溜桩的现象时有发生,对工程造成了很大的危害.论文基于层次分析法-模糊数学法（AHP-Fuzzy）提出海洋平台溜桩风险评估方法.将溜桩的影响因素归纳为桩、锤、土层性质、人为因素这4类.应用便利于专家和决策者掌握标度的3标度比较矩阵,以确定各评价指标的权重.4类因素中权重最大的是土层性质,土层性质中权重最大的是端阻之比.然后通过模糊数学确定隶属度建立模糊数学模型,确定该平台属于的风险等级的隶属度.通过实际工程中打桩记录的分析,按论文提出的方法进行溜桩风险等级预测.预测结果与实际情况相符,表明该方法可用作海洋平台大直径管桩打桩过程中的溜桩风险评估.

Large-diameter pipe piles are more and more widely used in ocean engineering, while pile running may occur. Based on the analytic hierarchy process （AHP） and fuzzy method （fuzzy）, this paper presents a method to evaluate the risk level of the pile running in offshore platform. Indices for evaluating pile running are classified into four types： pile, hammer, soil property and human factors. A three-scale comparison matrix is chosen, which is more favorable for engineers determining the weight of each evaluation index. A fiizzy model is established and the risk level membership of the pile running in each platform is determined. Nine platforms are used to verify the proposed method, and driving records of platforms show that the prediction is consistent with the actual situation.