粉细砂场地流砂危害等级评价

Evaluation of Hazard Rating of Quicksand in Silty- fine Sand Area

根据上海某场址区的工程地质条件,针对场区内广泛分布的粉细砂类土易于产生的流砂问题,运用可拓学理论,选取了直接或间接影响流砂危害程度的参数指标,建立了流砂危害等级评价模型;在此基础上,运用可拓学计算程序,得出研究场地内的流砂危害等级为中等至较高,结合以往资料,这一定量化的评价结果基本符合粉细砂场地的实际工程地质条件.

Based on the engineering geological condition of the construction field in Shanghai, the wide distribution of silty- fine sand is prone to cause the problem of quicksand. On this issue, extension theory has been used to evaluate the hazard rating of the quicksand, the parameters of the problem have been selected, and the evaluation model has also been set up. By the calculation procedure of the extension theory, the hazard rating of the quicksand problem of the field is middle to high. Combining with previous data,the quantitative results of the evaluation are in accordance with the actual site area of engineering geological conditions.