土木工程与管理学报2012，Vol.29Issue(3)：32-37,6.
修正Terzaghi理论在吹填土固结计算中的应用
Application of Modified Terzaghi Consolidation Theory in Hydraulic Fill Soil Consolidation Evaluation
摘要
Abstract
Application of classical one-dimensional Terzaghi consolidation theory is widely in elastic small strain consolidation with assumption that consolidation coefficient, permeability and compressibility keep constant. But non-neglected prediction errors exist during the application of Terzaghi theory in hydraulic fill consolidation as the settlement exceeds 50% will lead to great coordinate errors and a using limit. According to finite strain consolidation theory, modified Terzaghi theory calculates consolidation and modifies consolidation parameters on each strain step which will meet the agreement of small strain and elasticity. Through the nonlinear quasi-power functional relationships between permeability, compressibility and void ratio to express consolidation coefficient, consolidation coefficient the trend isn' t constant, and keeps changing in consolidation. It is reasonable to assume the variable consolidation coefficient is constant in a finite strain step (1% ~5%) to apply modified Terzaghi consolidation theory. After obtaining the related time step, modify the consolidation parameters such as consolidation coefficient, initial void ratio to calculate the time step at next finite strain step. Cumulate all the finite strain step settlement and time, consolidation curves can be got. Modified Terzaghi theory can meet the basic assumptions and reflect the nonlinear characteristic in consolidation, and the prediction results show a well agreement to the measured data. Modified Terzaghi theory can be introduced into large strain consolidation area.关键词
Terzaghi理论/吹填土/大变形固结/有限应变/修正Key words
terzaghi theory/ hydraulic fill/ large strain consolidation/ finite strain/ modification分类
建筑与水利引用本文复制引用
郭帅杰,王保田,张福海..修正Terzaghi理论在吹填土固结计算中的应用[J].土木工程与管理学报,2012,29(3):32-37,6.基金项目
教育部博士点基金(20100094110002) （20100094110002）
中央高校基本科研业务费专项资金(2009B13514) （2009B13514）
