摘要
砂土液化趋势预测是砂土液化防治的重要依据。基于层次分析(AHP)和粗糙集理论模型(RS),结合距离函数,探索性地提出了一种新的组合赋权模型(AHP-RS)。利用AHP-RS模型对唐山南部地震扰动区进行了砂土液化趋势评价,并探讨了AHP、RS、AHP-RS三种评价模型预测结果与实际液化情况的吻合性。结果表明:①AHP-RS模型得出轻微液化、中等液化面积占比49.9%,重度液化区面积占比50.1%,结果准确性较AHP和RS两种模型有较大提升;②从砂土液化轻、重等级划分范围来看,AHP-RS模型区划结果更接近实际液化分布情况,证实了AHP-RS模型的砂土液化评价预测结果具有更高的准确性和适用性,符合实际工程需要,可进一步推广应用。
Prediction of sand liquefaction trend is an important basis for sand liquefaction control.In this paper,a new combination weighting model(AHP-RS)was proposed based on the analytic hierarchy process(AHP)and rough set theory model(RS),combined with the distance function.The AHP-RS model was used to evaluate the liquefaction trend of sandy soil in the southern Tangshan earthquake disturbance area,and the prediction results of the three evaluation models of AHP,RS,and AHP-RS were compared with the actual liquefaction.The results showed that:①According to AHP-RS model,mild and medium liquefaction areas accounted for 49.9%and heavy liquefaction area accounted for 50.1%,proving that the results accuracy by this method was greatly improved compared with those by AHP and RS.②From perspective of the grades classification,the division results of the AHP-RS model were closer to the actual liquefaction distribution,confirming that the prediction results of the sand liquefaction evaluation by the AHP-RS model had higher accuracy and applicability.The new model meets actual engineering needs and can be further promoted in application.
作者
张田田
杨为民
ZHANG Tiantian;YANG Weimin(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;China University of Geosciences,Beijing 100083,China)
出处
《人民长江》
北大核心
2020年第10期167-172,共6页
Yangtze River
基金
中国地质调查局地质调查项目“京津冀协同发展区活动构造与区域的地壳稳定性调查”(DD20160267)。
关键词
砂土液化
层次分析
粗糙集理论
AHP-RS模型
预测评价
sand liquefaction
analytic hierarchy process
rough set theory
AHP-RS model
prediction evaluation
