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segregated ice
相关语句
  相似匹配句对
     Ice
     冰
短句来源
     Drying the Ice
     晒冰
短句来源
     The variant characters of D2 were segregated.
     后代D_2变异性状有分离。
短句来源
     The Study and Applications of the Segregated Early Weaning
     仔猪隔离超早期断奶(SEW)的研究应用
短句来源
     The chromatids segregated to opposite poles at anaphase.
     后期时,在纺锤丝的牵引下,姊妹染色单体分裂到两极。
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  segregated ice
Segregated ice includes ice lenses, ice nets, and ataxitic ice concentrations at the base of the active layer.
      
Occasionally massive bodies of segregated ice are found in this area, the shallower of which are probably associated with ice wedge development.
      


Three growth patterns of discrete ice including single thin ice lay,dual ice lay and thick ice lay were advanced and deduced owing to the influences of freezing rate and rate of water migration during soil freezing.Growth patterns of discrete segregating ice were veri- fied by using back analysis of the controlled tests.Meanwhile,the results of tests also showed that pore ice stress of warm end of segregating ice changed smoothly in the whole period of tests.With...

Three growth patterns of discrete ice including single thin ice lay,dual ice lay and thick ice lay were advanced and deduced owing to the influences of freezing rate and rate of water migration during soil freezing.Growth patterns of discrete segregating ice were veri- fied by using back analysis of the controlled tests.Meanwhile,the results of tests also showed that pore ice stress of warm end of segregating ice changed smoothly in the whole period of tests.With the growth of single thin ice lay and dual ice lay,ice segregation tem- perature and pore water stress greatly fluctuated.Particularly,during the growth of dual ice lay,the frozen fringe had the most sufficient growth and temperature of warm end of segre- gation and pore water stress had the lowest values.After the formation of thick ice lay,the temperature of warm end of segregation and pore ice and water stress stabilized gradually be- cause of slow freezing rate,thickening ice lay and thinning frozen fringe.

提出并推导土体在冻结过程中由于冻结速度和水分迁移速度的影响 ,造成不连续分凝冰有单薄冰层、双冰层和厚冰层 3种发育模式 .采用受控试验的反演分析验证了不连续分凝冰的发育模式 .试验结果同时表明 :在整个试验期间 ,分凝暖端的孔隙冰压力变化平稳 ;当单薄冰层和双冰层发育时 ,冰分凝温度和孔隙水压力波动较大 ,尤其是在双冰层生长时 ,冻结缘发育最充分 ,分凝暖端的温度和孔隙水压力降低幅度最大 ;在厚冰层形成后 ,由于冻结锋面推移缓慢和冰层厚度的不断增加 ,冻结缘厚度减小 ,分凝暖端温度和孔隙冰、水压力趋于稳定 .

A number of reports indicate that the frost heaving due to water transfer and ice segregation exceeds the original volume of the pore water because of the expansion during freezing.The rigid ice model illustrates in detail the ice segregation and other phenomena in a freezing fringe,i.e.a mixed region of unfrozen water and ice between the warm end of the warmest segregated ice and the freezing front.In this paper,the frozen heaving process is simulated in saturated,granular,solute-free soil,based on the...

A number of reports indicate that the frost heaving due to water transfer and ice segregation exceeds the original volume of the pore water because of the expansion during freezing.The rigid ice model illustrates in detail the ice segregation and other phenomena in a freezing fringe,i.e.a mixed region of unfrozen water and ice between the warm end of the warmest segregated ice and the freezing front.In this paper,the frozen heaving process is simulated in saturated,granular,solute-free soil,based on the rigid ice model.In the numerical simulation,a criterion is set for the appearance of new ice lens based on the assumption that stress equilibrium should be in accordance with the stress boundary condition.In the criterion,the ice pressure is used instead of the pore pressure.The finite difference method is used and nonlinear algebraic equations are solved by iterative method with hysteretic coefficients.The calculation result is compared with the data from reference.The characteristics revealed from the simulation match well with the expesimental data.It is demonstrated that the rigid ice model is effective in simulating the phenomena in frozen fringe during soil freezing process.

基于刚性冰模型,应用有限差分法离散方程组,对于饱和颗粒土开放系统的冻结过程进行了一维数值模拟,给出了冻结缘内参数的分布.计算过程中修正了刚性冰模型中分凝冰产生条件,提出以冻结缘内冰压与载荷的关系作为分凝冰产生的判据,计算得到的冻胀量与实验室冻胀实验的测量数据较为吻合.将计算结果与现场实测资料进行了比较,温度场、含水量分布等结果在分布规律方面与现场实测资料相符.

 
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