自重作用下吹填土地基的大变形固结分析  

Analysis of Large-strain Consolidation of Dredger-filled Foundation under Gravity

作　　者：邱长林[1] 于博文 闫澍旺[1] 纪玉诚[1] Qiu Changlin;Yu Bowen;Yan Shuwang;Ji Yucheng(School of Civil Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《港工技术》2020年第4期79-83,共5页Port Engineering Technology

基　　金：国家自然基金面上项目(41272323)。

摘　　要：为了研究吹填地基在自重作用下的固结特性,通过室内固结试验研究了吹填土在小压力作用下的压缩特性,建立了吹填土孔隙比和固结压力之间的关系式。利用该关系式,结合Gibson固结理论,建立了吹填土地基在自重作用下以超孔隙水压力为场变量的大变形固结方程,并用该方程分析了在自重作用下吹填土地基的固结规律,为吹填土地基的设计及寻求加快其自重固结的途径提供理论依据。In order to study the consolidation characteristic of dredger-filled foundation under gravity,the compressibility of dredger fill under low compression stress is studied through the consolidation test in lab and a formula is developed to represent the relation of void ratio and the compression stress of dredger fill.The formula is combined with Gibson consolidation theory to build the large-strain consolidation equation in term of excess pore water pressure as a field variable,which is used to analyze the consolidation rule of the dredger-filled foundation under gravity,and lays a theoretical basis for the design and the method to speed up the consolidation.

关 键 词：吹填土 小应力 大变形 自重固结 

分 类 号：TU223[建筑科学—建筑设计及理论]