某高速公路软基沉降模型预测效果评估  

Effect Evaluation of Model in an Expressway Settlement Prediction on Soft Ground

作　　者：范广 肖衡林 张建桥 FAN Guang;XIAO Henglin;ZHANG Jianqiao(Yunnan Haotai Highway Survey and Design Co.,Ltd.,Kunming 650214;School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068;Design and Research Institute of Yunnan Construction and Investment Holding Group Co.,Ltd.,Kunming 650501)

机构地区：[1]云南皓泰公路勘察设计有限公司,昆明650217 [2]湖北工业大学土木建筑与环境学院,武汉430068 [3]云南省建设投资控股集团有限公司设计研究院,昆明650501

出　　处：《公路交通技术》2023年第1期34-40,共7页Technology of Highway and Transport

摘　　要：软基沉降规律对指导路基与路面设计、施工有重要作用。在分析某高速路实测软基路段沉降规律的基础上,分别采用Logistic模型、Asaoka模型、复合双曲线模型对实测数据进行了拟合。结果表明:1)复合双曲线模型与沉降实测数据变化较吻合,能较好地反映路段的沉降规律,模型预测效果较好;2)Logistic模型曲线存在唯一反弯点,对“台阶”状曲线拟合误差较大,沉降预测效果较复合双曲线差;3)Asaoka模型仅能预测本级荷载下的最终沉降量,无法越级预测,对施工中软基沉降预测效果不佳。The settlement regularity of soft foundation plays a significant role in guidance for design and construction of subgrade and pavement Based on measured data analysis for settlement regularity of soft foundation of an expressway,this paper simulates these data by respectively adopting logistic mode,Asaoka mode and compositive hyperbolic mode.The results show that:1)The compositive hyperbolic model is roughly coincide with the measured data,which indicates that this settlement mode can well reflect settlement regularity of the road section,and the prediction effect of the model is good;2)The logistic model has only one inflection point,there is a large deviation for the"steps"shape curve,and the settlement prediction result is worse than that of the compound hyperbola;3)Asaoka model can only predict the final settlement under the level of load,and it cannot skip the level of prediction.The prediction effect of soft foundation settlement during construction is poor.

关 键 词：软基 LOGISTIC模型 Asaoka模型 复合双曲线模型 沉降规律 

分 类 号：U416.1[交通运输工程—道路与铁道工程]