GEH理論壓密量速算式

• Main Author: 吳明龍
• Other Authors: 李顯智
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/99002122301826936169

碩士 === 國立中央大學 === 土木工程研究所 === 88 === Abstract Terzaghi’s theory of soil consolidation is widely used in engineering practice . Simplicity is its merit . However，the theory will underestimate the excess pore water pressure . Many researchers had tried to propose theoriers which match the reality better than Terzaghi‘s theory does . Among these , the theory proposed by Gibson and his co-workers in 1967 is one of the most popular theories in literatures. A nonlinear consolidation equation was derived in Gibson’s work , which can describe finite strain consolidation . The merit of Gibson’s theory is that it describes the behavior of soil better than Terzaghi’s theory does .The shortcome of it is that the consolidation equation is nonlinear，which usually can not be solved analytically . Recently，it was found that the nonlinear consolidation equation is Gibson’s theory can be linearized，and thus could be solved analytically .In this research， we will clarify the physical meaning of the linearization and try to obtain analytical solution of the linearized consolidation equation associated with moving boundaries. A simple formula will be derived for the quick calculation of the settlement of the soil ground in engineering practice . Our results are summarized as follows . （1）A moving boundary value problem of the linearized Gibson’s equation is solved analytically and approximately . （2）A simple formula for quick calculation of settlements is derived. The formula derived in Terzaghi’s theory for calculating settlements is simple but not matches the reality very well . And our formula is simple and matches the reality better than Terzaghi’s theory does.