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按照真空预压规范设计的吹填土固结时间,经常发生吹填土固结度达不到设计要求。规范是根据井径比对固结系数进行折减来考虑吹填土固结特性,而吹填土的固结特性会受到加固过程中土体的孔隙比、渗透系数、压缩系数等因素随时间变化的影响。针对工程中出现的问题,结合模型试验的结果以及对土体的固结特性进行研究,用差分法对土体的固结情况进行数值计算。经与试验结果和差分法模拟结果对比,验证了方法的合理性,可作为实际工程的借鉴。
According to the design of vacuum preloading dredging consolidation time, often do not meet the design requirements of the filling and embankment consolidation. The specification is based on the well diameter ratio of the consolidation factor to reduce the consolidation to consider the characteristics of dredger fill, while consolidation of dredger fill soil consolidation process will be affected by the porosity ratio, permeability coefficient, compressibility factor and other factors over time The impact of change. In view of the problems occurred in the project, combined with the results of model tests and the consolidation characteristics of soil, the difference method is used to calculate the consolidation of soil. Compared with the test results and the simulation results of the difference method, the rationality of the method is verified, which can be used as a reference for practical engineering.