机场软土地基在堆载预压下的沉降特征分析  

Settlement Characteristics Analysis of Airport Subgrade by Surcharge Preloading

作　　者：方意心 张家科 石蓉 FANG Yixin;ZHANG Jiake;SHI Rong(The Key Laboratory of Infrastructure Durability and Operation Safety in Airfield of CAAC, Tongji University, Shanghai 201804, China;College of Transportation Engineering, Tongji University, Shanghai 201804, China;Sichuan Airport Group Co., Ltd., Chengdu 610000, China)

机构地区：[1]同济大学民航飞行区设施耐久与运行安全重点实验室,上海201804 [2]同济大学交通运输工程学院,上海201804 [3]四川省机场集团有限公司,成都610000

出　　处：《交通科技》2021年第5期1-5,16,共6页Transportation Science & Technology

基　　金：国家重点研发计划2019YFB1310600资助。

摘　　要：为将堆载预压法更合理地应用于机场软土地基处理中,基于太沙基一维固结理论,介绍并推导了面向机场工程中大面积堆载的软土地基的沉降特性计算模型。通过对比分析国内某机场场区内实测数据和理论模型计算结果,得到负指数形式的软基固结理论模型,说明堆载预压造成的沉降量与堆载高度呈正比,节省的工期与堆载高度和土体高度均呈对数线性关系。To make the surcharge preloading method more reasonably applied to the clay subgrade treatment of airport,the settlement characteristics calculation model of soft soil foundation for large area surcharge in airport engineering is introduced and deduced on the basis of Terzaghi′s one-dimensional consolidation theory.By comparing and analyzing the measured data and theoretical model calculation results of an airport in China,the theoretical model of soft foundation consolidation in the form of negative exponent is obtained,which shows that the settlement caused by surcharge preloading is proportional to the surcharge height,and the saved construction period is logarithmically linear with the surcharge height and soil height.

关 键 词：机场工程 堆载预压 软土地基 沉降监测 沉降预估 

分 类 号：U416.1[交通运输工程—道路与铁道工程]