天津滨海区轻亚粘土地震液化研究——模糊模式识别的应用

THE STUEY OF SANDY LOAM LIQUEFACTION IN TIANJIN LITTORAL

本文在全面分析天津滨海区地震液化区域地质环境的基础上,探讨了多种影响因素对轻亚粘土液化的影响,并采用了一种比较合理的模糊模式识别方法对该区轻亚粘土液化与否及液化程度进行了预测。预测结果与宏观调查结果基本吻合。

Two aspects should be included in considering the liquefaction of the sandy loam of Tianjin littoral, One is to evaluate the possibility of liquefaction of the sandy loam and another is to calculate the degree of liquefaction and cndangerment for buildings laid on it.In this paper, the influence of the regional geology environmcat on the liquefaction of sandy loam during earthquake in the region is comprehensively analyzed, including topography, regional structure, seismic condition and hydro-geological condition, etc. The influence factors of liquefaction of the sandy loam is also discussed. On the base of the above analysing, a fuzzy pattern distinction methed is adopted to assess the liquefacient possibility and the liquefacient degree of the sandy loam, which provides a reliable gcoloy basis for the plan of development and construction in this area.Results calculated with this method show good agreement with those from macroscopic investigation. This explains that the new method is reasonale and practical for judging the sandy loam liquefaction. By using the maximum membership principle, this sandy loam region can be divided into three types with different liquefaction degress .