利用侧限压缩试验研究高压应力下石英粗砂和细砾的颗粒破碎特性，基于分形模型和粒径分布资料，研究颗粒的破碎分形。结果表明：颗粒破碎量随着压力的增加而增加，并与粒径大小有关。随着破碎量的递增，粗砂的内摩擦角逐渐增大，细砾的内摩擦角先增大后减小，二者最终均趋于稳值；石英砂砾破碎后的粒度分布具有良好的分形特性，破碎分维数的数值大小反映了破碎量的变化，破碎量愈高，分维数愈大，并与 Hardin 破碎率有较为显著的线性关系。破碎分维数和 Hardin 破碎率与压应力之间分别存在着双曲线关系和半对数线性关系，因而通过压应力和土粒参数就可估计破碎分维数和破碎率。破碎分维数为粒状材料的颗粒破碎分析提供了一个新的量化指标。

利用扫描电镜（SEM）研究软黏土固结前后的微观结构，采用数字图像技术研究软黏土固结过程中微孔隙的大小、数量及其分布的演化规律。基于Sierpinski地毯的分形概念，结合量测数据给出了描述孔隙结构的Sierpinski分维数并研究其差异性。图像分析表明，随着固结压力的增大，软黏土的孔隙度和孔径趋于减小，孔径范围变窄，土体固结过程对孔隙级配具有一定的调节作用。分形研究表明，分维数的数值大小反映了软黏土固结过程中的孔隙度变化，固结压力愈大，孔隙度愈小，分维数愈大。分维数与孔隙度、固结压力、压缩量之间存在较为显著的线性回归关系，并能反映软黏土的结构性特点。研究结果揭示了土体宏观变形与微孔隙结构分形特性之间存在的相关关系，分维数可为软黏土固结变形预测提供依据。

An ecotypic revetment material consisting of nutrition-expansive perlitic-cement composites is introduced. This planting material can combine vegetation recovery with slope protection. The XRD, SEM and image analysis techniques were used to study its composition and microstructure. Its strength was measured by an electro-hydraulic servo-controlled testing machine. The results show the unconfined compressive strength is about 393.6 kPa, and the average elastic modulus is about 47.0 MPa. The quartz, felspar, chlorite and calcite are the main non-clay minerals in the planting material . Its particles are mainly spherical, and the range of the equivalent diameter is 1.83 to 15.96 μm. The results also show the planting material contains a large amount of micro non-capillary and capillary pores, and has a microstructure characteristic of honeycomb and coralline. CSH gel produced by hydration of cement increases the strength and water stability of the particles. The anisotropy and slight orientation of the particles increase the void cross-section area, providing an explanation of the high permeability for the planting material. The better porosity of the planting material is apt to keep moisture and nutriment, provides oxygen for plant root breathing, and aids to exhaust the carbon dioxide by means of exchanging with atmosphere, hence it can facilitate vegetation.