主要论述了土的级配指标在工程中的应用，对路桥工程具有一定的实际意义。
The applications of soil gradation index in road and bridge project and its practical meaning were discussed in this article.
研究表明，在连续级配碎石、砂砾、石灰稳定土、石屑几种回填材料中以自然级配砂砾石为最佳台背回填材料。
According to the research, the natural graded gravel is the best backfill material of graded crushed stone, grit, lime stabilized soil and rock chips.
结合秦沈线施工特点，具体指出路基采用细粒土、粗粒山皮土和级配碎石几种具有代表性填料进行填筑的技术要求。
Considering the features of the construction of this line specific requirements are specified in the filling such as filling with fine earth, coarse mountain surface soil and graded crushed stones.
并通过试验得出，含一定量细粒组分且级配良好的粗粒土渗透破坏坡降比级配不良的粗粒土渗透破坏坡降普遍要高的结论。
And it comes to a conclusion that the permeation damage slope of the coarse-grained soil of well graded with a definite proportion of fine granule is higher than that of poorly graded.
因而，提出应从其筑坝土料性质分析，采用级配好、抗剪强度大的优质土料换填滑坡体土料的办法处理。
Therefore, the quality of dam material should be firstly analyzed, and the best alternative method is to replace the landslide mass with well-graded and high shear-strength earth materials.
级配较好的土，沉积后的干密度较大；
Well graded soil will has the larger dry density after sedimentation ?
蒋家沟泥石流内广泛分布级配宽广的砾石土，砾石土的力学性状对于泥石流的起动发生有重要影响。
There are gravelly soil distributed grain diameter widely in Jiangjia Ravine, the mechanical behavior of gravelly soil is important for initiation of debris-flows.
颗粒大小、级配及水质条件与土的力学性质密切相关，水位的存在使地基具有上硬下软的双元结构特点，与相对密度相同的石英砂地基相比，其沉降变形要小几十倍。
Double-Layer structure in subsoils is caused by water level and the settlements of subsoils are several dozen 'times smaller than those of quartz sands for 3rd band buildings.
颗粒大小、级配及水质条件与土的力学性质密切相关，水位的存在使地基具有上硬下软的双元结构特点，与相对密度相同的石英砂地基相比，其沉降变形要小几十倍。
Double-Layer structure in subsoils is caused by water level and the settlements of subsoils are several dozen 'times smaller than those of quartz sands for 3rd band buildings.
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