真空联合堆载预压在超载状态下的卸载时机分析  

Analysis on Unload Time of Vacuum Combined Surcharge Preloading in Overloading State

作　　者：李明英[1] 尹长权[1] 

机构地区：[1]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》2010年第3期13-15,38,共4页China Harbour Engineering

摘　　要：为了合理解决超载状态下真空联合堆载预压法的卸载时机问题,通过对超载状态下沉降速率法、工后沉降值法和应力固结度法的计算分析,结合深圳某真空联合堆载预压实验区的现场实测资料,分析了不同方法在超载状态下卸载时机判定的可行性及存在问题,通过综合分析,能够合理准确地判定卸载时机。In order to solve the unload time problem of vacuum combined surcharge preloading method in overloading state reasonably,based on the computational analysis on settlement rate method,post-construction settlement value method and consolidation degree of stress method,combined with the field test observational data of one vacuum combined surcharge preloading area in Shenzhen.This paper analyzes the feasibility and existing problems for judging unload time in overloading state by different methods.The unload time can be judged accurately through comprehensive analyses.

关 键 词：超载预压 沉降速率 工后沉降 应力固结度 

分 类 号：TU472.33[建筑科学—结构工程]