四参数Logistic模型在软土地基沉降推算中的应用  

Application of Four-parameter Logistic Model in Settlement Calculationof Soft Soil Foundation

作　　者：黄珊珊 许小健 HUANG Shanshan;XU Xiaojian(Wuhu Surveying and Mapping Design Institute Co.,Ltd.,Wuhu 241000,China)

机构地区：[1]芜湖市勘察测绘设计研究院有限责任公司,安徽芜湖241000

出　　处：《城市勘测》2024年第2期190-194,共5页Urban Geotechnical Investigation & Surveying

摘　　要：地基的沉降变形是反映工程(如建筑物、公路和铁路等)安全性的重要指标,也是岩土工程领域的热门研究课题。为进一步加深对软土地基沉降发展规律的认识和提高软土地基沉降推算的准确性,采用了四参数Logistic模型对软土地基沉降-时间曲线进行模拟推算,并基于实例计算结果将四参数Logistic模型与地基沉降推算方法中常用的三参数Logistic模型、Gompertz模型和双曲线模型进行了比较研究。计算结果表明,四参数Logistic模型作为软土地基沉降发展规律的模拟描述是适合的,比三参数Logistic模型推算沉降精度更高;相比于常用的三参数Logistic模型、Gompertz模型和双曲线模型,四参数Logistic模型推算后期沉降发展趋势效果更好;四参数Logistic模型在软土地基沉降推算应用方面具有更好的可靠性和实用性,值得推广应用。The foundation settlement is an important index to reflect the safety of engineering(such as buildings,highways and railways),and is also a hot research topic in the field of geotechnical engineering.In order to further deepen the understanding of the development law of the settlement of soft soil foundation and improve the accuracy of the settlement prediction,the four-parameter logistic model is used to simulate the prediction of the settlement-time curve of soft soil foundation,and a comparative study based on instance calculation results is made with the three-parameter Logistic model,Gompertz model and hyperbolic model prediction method commonly used in the prediction method of foundation settlement.The calculation and analysis shows that the four-parameter logistic model is suitable as the description of the settlement development law of soft soil foundation,and has higher accuracy than the three-parameter Logistic model in settlement prediction.Compared with the Gompertz model and hyperbolic model,four-parameter Logistic model has better effect in predicting the development trend of late settlement.The four-parameter Logistic model is reliable and practical in the application of settlement calculation of soft soil foundation,and has the value of popularization and application.

关 键 词：软土地基 沉降推算 四参数Logistic模型 Gompertz模型 双曲线模型 

分 类 号：TU433[建筑科学—岩土工程]