软上地基上加筋碎石垫层工作性状试验研究

通过模型试验研究了加筋和不加筋碎石垫层在软土地基上的承载特性,分析了垫层厚度、加筋材料、加筋层数、筋体布置位置等因素对垫层承载特性的影响。结果表明：垫层厚度对地基沉降影响明显,合理的垫层厚度能有效地降低地基的沉降;加筋后的碎石垫层对降低地基沉降的效果更明显,同等条件下,土工格室的加筋效果优于土工格栅;加筋层数及筋体布置位置对加垫碎石垫层承载特性有一定影响,层数越多加筋效果越好,将筋体布置在垫层下部时效果最好;加垫层能在一定程度上提高地基基床系数,其中土工格室加筋碎石垫层对提高地基基床系数效果最好。

Experimental Research on the Working Properties of Reinforced Gravel Cushion on Soft Soil Foundation

Studied the load-bearing characteristic of reinforced and non-reinforced gravel cushions on soft soil through model tests. Analyzed the effects of cushion thickness, reinforced materials, number of reinforcement layers and location of reinforced-materials on the bearing characteristic of the cushion. The results show that: The reasonable thickness of cushion can effectively reduce the settlement of the foundation and the effect of reinforced gravel cushion is more obvious, and under the same condition, the effect of geocells is better than that of geogrids. Number of reinforcement layers and location of reinforced materials have impact on the load-bearing characteristics of the reinforced gravel cushion. The reinforcement layer number is more and the reinforced effect is better. The effect is best as the reinforced materials is laid at the bottom of the cushion. Adding cushion can improve the coefficient of subgrade reaction and the effect of geocell reinforced gravel cushion is best to improve the coefficient.