模糊信息分析模型在黄骅港砂土液化判别中的应用

摘要

黄骅港地区广泛分布着粉土及砂土层，对码头桩基稳定性有重要影响。鉴于砂土液化判别的不确定性和模糊性，本文引入模糊综合评判理论，通过对黄骅港海伟码头砂土液化判别资料的分析，应用模糊信息分配法建立包含砂土测试深度、粘粒含量及标贯击数3个影响因素的模糊关系矩阵，进而建立了适用于该工程的砂土液化模糊信息分析模型。通过对实际工程数据的计算对比，该模型计算结果与实际情况一致，具有较高的可信度。%Mealy soil and sandy soil layers are widely distributed over Huanghua Port area, which are important factors influencing the stability of wharf’s pile foundation. Because of the fuzziness and uncertainty of sandy soil liquefaction evaluation, the fuzzy evaluation theory was adopted to analyze sandy soil liquefaction data on Huanghua port Haiwei terminal. The fuzzy relation matrix was built by using fuzzy data distribution method, which includes three influencing factors, namely sandy soil testing depth, clay particle content and SPT blow count. Furthermore, a fuzzy data analysis model was built for evaluating sandy soil liquefaction in the project. The model calculation results had high reliability because they were consistent with actual engineering data.