袋内材料对土工袋动力特性参数影响的试验研究

土工袋加固地基技术已普遍应用于房屋地基、边坡加固等工程中。大量研究表明，土工袋具有显著的减振消能效果。为了进一步探讨不同的袋内充填土体材料对土工袋减振消能效果的影响，通过对不同粒径、级配、黏粒含量的填充土体材料及装有相应填充土体材料的土工袋进行水平循环剪切试验，研究袋内填充土体材料与动剪切模量及等效阻尼比2个参数的关系。试验结果表明，土体装入土工袋后，动剪切模量降低，等效阻尼比增大；当填充土体材料及土工袋内土体材料粒径相对较小、级配均匀、黏粒含量高时，等效阻尼比和动剪切模量较大。总体而言，粒径和级配对土工袋减振消能效果影响不大。

Experimental study of effects of soil fills on dynamic characteristics parameters of soil-bags

Soil-bags are a new earth reinforcement method and have been widely used in many projects including building foundations and slope reinforcement. A large number of researches on soil-bags show that soil-bags have significant vibration energy absorption effect. This paper investigates the effects of different soil fills in bags on vibration energy absorption. Cyclic simple shear tests are carried out on soil-bags filled with different soils and on soil-bags filled with soils that have different particle sizes, gradations and clay contents. The dynamic shear modulus and the equivalent damping ratios of the soil-bags and fill soils are analyzed. The test results show that the dynamic shear modulus of soil-bags are smaller and the equivalent damping ratios of soil-bags are higher than the fill soils. The dynamic shear modulus and equivalent damping of both the fill soils and the soil-bags are relatively higher in the cases that particle sizes of the fill soils are smaller, gradations are uniform and clay contents are larger. In general, the effects of the particle sizes and gradations of the fill soils are not pronounced on the equivalent damping ratios.