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假定初始孔压降不小于起始比降,获得了这一条件下考虑起始比降双层地基的一维固结解析解。计算结果表明当固结完成时,由于起始比降的存在,土中的孔隙水压力并不会完全消散,仍存在残余孔隙水压力,其数值与双层地基起始比降的大小有关,且上层土的起始比降对孔压消散速率、最终孔压的大小影响较下层土大;考虑起始比降,地基平均固结度按沉降定义和按孔压定义并不相同,按沉降定义的地基平均固结度要大于不考虑起始比降时的地基平均固结度,而按孔压定义的地基平均固结度要小于不考虑起始比降时的地基平均固结度,且其最终值小于1。
Assuming that the initial pore pressure drop is not less than the initial drop ratio, one-dimensional consolidation analytic solution of double-layered ground considering initial ratio drop is obtained under this condition. The calculation results show that when the consolidation is completed, the pore water pressure in the soil does not completely disappear due to the initial ratio drop, and the residual pore water pressure still exists. The numerical value of the pore water pressure is related to the initial ratio drop of the two- And the initial ratio of the upper soil to pore water pressure dissipation rate, the final pore pressure greater than the impact of the size of the underlying soil; consider the initial ratio, the foundation of the average consolidation degree according to the definition of settlement and press the definition of pore pressure is not the same, according to the settlement The average consolidation degree of the foundation is larger than the average consolidation degree of the foundation when the initial ratio is not considered and the average consolidation degree of the foundation defined by the pore pressure is smaller than the average consolidation degree of the foundation without considering the initial ratio. And its final value is less than 1.