沉降速率法在真空预压中的应用  

Settlement velocity method and its application in vacuum preloading

作　　者：刘维利[1] 李立新[2] 尹长权[2] 

机构地区：[1]天津港港务设施管理中心,天津300456 [2]中交天津港湾工程研究院有限公司,港口岩土工程技术交通行业重点实验室,天津市港口岩土工程技术重点实验室,天津300222

出　　处：《中国港湾建设》2014年第9期7-10,共4页China Harbour Engineering

摘　　要：真空预压加固软土地基工程中,往往通过实测沉降数据推算最终沉降量和固结度以确定卸载时机,进而达到控制加固质量的目的。文章介绍了一种基于经典固结理论的反分析方法——沉降速率法,该方法既可以用于推算最终沉降量,也可以用于推算卸载时的沉降速率。工程实例表明,基于沉降速率法的反分析结果合理。In the project of improving soft foundation with vacuum preloading, in order to insure the consolidate effect, we widely applied the settlement data from field monitoring to get the ultimate settlement and consolidation degree of the ground, which will be used to determine the unloading time. This paper introduces a back analysis method based on the classic consoli-dation theory, namely, settlement velocity method. This method can be used to determine both ultimate settlement and settlement velocity at unloading time. Engineering practice shows that the back analysis method based on settlement velocity is reasonable.

关 键 词：沉降速率 反分析 真空预压 地基处理 

分 类 号：U655.544[交通运输工程—港口、海岸及近海工程]