The model shows that : 1 ) structure of the stabilized soil from silt is formed by hydrates , which are generated by hardening agent hydration , wrapping and cementing soil particles and filling pores among the particles ; 2 ) structure of the stabilized soil formed from clayey soil is formed by the hydrates wrapping and cementing clay particle groups , filling pores among the groups , and squeezing and filling pores in the groups 该模型认为:粉土固化土结构是由固化剂水化物充分包裹胶结土颗粒和填充土颗粒间孔隙而构成;黏性土固化土结构是通过固化剂水化物包裹胶结土团粒、填充土团粒间孔隙、挤压填充土团粒内孔隙而构成。
According to the structure formation model of stabilized soil , it is proposed that the hardening agent for stabilizing soft soil should generate cementitious hydrates to bind soil particles and expanding hydrates to fill pores in the stabilized soil ; calculation formulas are developed , by which dosage of components constituting hardening agent can be calculated according to characteristics of the soil 摘要根据固化土结构的形成模型,提出了加固软土的固化剂应分别产生胶结土颗(团)粒的胶结性水化物和填充孔隙的膨胀性水化物,进而,建立了根据土样的性质指标确定固化剂组分与掺入比的计算公式。
In the comprehensive fuzzy evaluation model of soil liquefaction , the following factors , such as earthquake intensity , spt counts , groundwater level and mean diameter of sand soil particle which affect the liquefaction of sand soil were considered , and the sketch map of trapezoid subordinate function was adopted and the subordinate function expression of each factor was given 在提出的砂土液化模糊综合评判模型中,通过综合地震烈度、标贯击数、地下水位和平均粒径等影响砂土地震液化的因素,采用梯形隶属函数并分别给出各因素隶属函数的表达式。
Fractal scaling of soil cumulative mass particle - size distribution is more easy to be use to get particle - size distributions fractal dimension ( dp ) , this model give the dimension a strictly range : 0 < 3 . it response to filled - ability of soil particles . the texture is heavier , the dp is too high . 2 以土壤累计质量分布的粒径分形特征为基础,将颗粒数量表示的粒径分布分形维数化解为以颗粒质量确定的粒径分布分形维数,可以更为方便地确定出粒径分布分形维数。
Knowledge and conclusions educed from the study are following : firstly , actual behaviors of soil erosion on affecting soil quality have been described . comparisons of landform measurements on the spots , and results of physical and chemical analyzing indicated that micro - iandform , proportions of soil particles sizes , and contents of soil carbon and nutrient have differences of spatial distribution under different conditions of fertilization development , cultivation , slope , and soil erosion management , which are closely related to intensities of soil erosion and sediment deposition 研究中,在前人基础上紧跟研究前沿,主要得出如下成果和创新点:一、明确了侵蚀作用影响土壤碳和养分含量的具体表现:经过实地测量、采样颗粒分析和养分分析,结果表明,在不同培肥、不同耕作、不同坡度以及不同侵蚀控制条件下,受侵蚀及堆积作用强弱的影响,微地形形态、土壤颗粒组成、碳和养分含量在空间上都可能出现较大的分布差异。