A finite element solution to the rolling of two‐phase materials is
presented and applied to the rolling of prepared sugar cane. The generalized
Biot theory is extended and modified to suit the present problem and the
velocity of the solid skeleton and the pore pressure are taken as the primary
unknowns. The finite element approach is applied to the governing equations
for spatial discretization, followed by time domain discretization by
standard difference methods. A constitutive relation evaluated from a finite
element simulation of experiments performed on a constrained compression test
cell is employed. The computational model of the rolling of prepared cane
with two rolls is presented. The material parameters of prepared cane are
described and their variation during the rolling process are derived and
discussed. Numerical results are presented to illustrate the performance and
capability of the model and solution procedures.
The consolidation of earth and rock dam foundations and its effect on stability is a key concern in water conservancy and water transportation projects. It is common to use the vacuum combined pre-pressure method to deal with soft ground foundation, where the reasonable selection of soil consolidation coefficient is one of the important factors to determine the success of the project. In this paper, numerical simulation is used to study the strength law of soil and rock dam foundation under different consolidation coefficients of soft ground, and the corresponding stability coefficients of soil and rock dam are obtained. On this basis, the reinforcement effect of an additional counter pressure platform is proposed and analyzed. The results show that the larger the consolidation coefficient of soft ground is, the more it is conducive to the growth of the strength of the soft soil layer and can effectively improve the stability coefficient of the earth and rock dam. At the same time, the additional counter-pressure platform has a certain effect on the overall stability enhancement of the earth and rock dam. The research results can provide a reference for the application of vacuum combined pre-pressure method to earth and rock dam projects.
Many water diversion channels in China were built on thick and high-permeability super stratum, and groundwater level exerts significant influence on the anti-floating stability of the channel lining structure. The check valve drainage is an effective engineering measure for ensuring the anti-floating stability. However, people have rarely paid attention to the anti-floating calculation of lining structure once the check valve fails. This study, based on the typical cross-section of a diversion channel, investigated the characteristics of anti-floating stability of the diversion channel by using finite-element numerical simulation and theoretical analysis. The results show that reasonable calculation of anti-floating water level in the channel should be based on both numerical simulation and theoretical formula. As the check valve works normally with local failure, increasing the water level of the channel can prevent the lining structure from floating up. However, if the channel section cannot meet the anti-floating requirements when the check valve completely fails, corresponding measures should be taken in actual engineering projects to avoid the floating.
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