secondary consolidation การใช้

• Coefficient of secondary consolidation
• Secondary consolidation settlement
• It can eliminate the majority of primary consolidation settlement and parts of secondary consolidation settlement
• The conventional method of computing the secondary consolidation of soft soils docs not reflect the influence of load
• Authors adopted an average secondary consolidation coefficient in settlement calculation of peal foundation in order to make results more reliable
• Based on the results , the computation method for deformation of the secondary consolidation reflecting the influence of consolidation pressure was developed
• The results were as follows : for the over - consolidated soils , coefficient of the secondary consolidation increased with load ; for normal - consolidated soils , it decreased with load
• Through analysis for the micro - structure of the peat , properties and characteristics of peat were studied , which include water content , strength consolidation and secondary consolidation properties
• Based on it , the concept and calculation formula of secondary primary settlement ratio were put forward , which can determine the ratio of secondary consolidation settlement and primary consolidation settlement
• This coupling action between the rheology of soil and the dissipation of excess pore pressure demonstrates that it is not reasonable to factitiously divide the process of consolidation into two independent ones , i . e . primary consolidation and secondary consolidation
• The relationship between the secondary consolidation deformation and load were discussed and the characteristics of the secondary consolidation of normally consolidated soils were emphansized in discussion , and some rules were concluded and analyzed
• On the basis of the previous achievements and the settlement observed data , considering the obvious creep characteristic , visco - elastic - plastic creep model , which reflects the saturated soft clay ' s nonlinear deformation characteristic , has been proposed in this paper , with the consideration of the primary and secondary consolidation settlement . the soft clay visco - elastic and visco - plastic deformation is also depicted respectively
• There is certain relation between the secondary consolidation coefficient and the secondary primary settlement ratio , that is , when the secondary primary settlement ratio is less than 1 , variation of secondary consolidation coefficient is very small , which even can be neglected ; with the increase of the secondary primary settlement ratio , variation of secondary consolidation coefficient increases at the same time
• It was shown that there were many factors impacting on the creep characteristics of soils , such as the initial degree of consolidation , drainage condition , load ratios and so on ; and the relationship between coefficient of secondary consolidation and consolidation pressure depended on preconsoildation pressure and load ratios in the test
• Because the high pore - water ratio , lower strength , high compression all are the characteristics for the soft foundation . therefore , per - loading technique is usually adopted to get rid of most deformation due to primary and secondary consolidation before construction . even so , the foundation settlement after construction will exist for a long period