By replacing the polyethylene terephthalate (PET) package of stacked sandbags by polyethylene naphthalate (PEN) textile capsule from air springs, a new geosynthetics isolator is developed to improve the mechanical properties of stacked sandbags. Sand and rubber particles were mixed and used to fill the isolator as a soil skeleton. The mechanical testing results showed that the vertical stiffness and damping performance could be easily adjusted by changing the particle mixture ratio. The horizontal stiffness is approximately a quarter of the vertical value, and the horizontal damping ratio is as high as 25%. The ultimate shear strain and compressive stress are 15% and 40 MPa, respectively. Both of these values are much greater than that of stacked sandbags and are appropriate for most buildings near metro transportation. The feasibility of the isolator is verified via field experiments with a full-scale building. After installing the new isolators, the vibration comfort of occupants in the vertical and horizontal directions is significantly improved, as is the secondary air-borne noise comfort. Moreover, the resonant influences caused by vertical and horizontal low-frequency road vibrations are suppressed by the isolator's high-damping performance. Therefore, this geosynthetics isolator is feasible for the base isolation of buildings neighboring metro transportation.

通过用来自空气弹簧的聚萘二甲酸乙二醇酯（PEN）纺织胶囊代替聚对苯二甲酸乙二醇酯（PET）包装的堆叠沙袋，开发了一种新的土工合成材料隔离器，以提高堆叠沙袋的力学性能。沙子和橡胶颗粒被混合并用于填充隔离器作为土壤骨架。力学测试结果表明，通过改变颗粒混合比可以很容易地调整垂直刚度和阻尼性能。水平刚度约为垂直值的四分之一，水平阻尼比高达 25%。极限剪切应变和压缩应力分别为 15% 和 40 MPa。这两个值都远大于堆叠沙袋的值，适用于地铁交通附近的大多数建筑物。隔离器的可行性已通过现场实验与全尺寸建筑进行验证。安装新型隔振器后，乘员在垂直和水平方向的振动舒适度显着提高，二次空气传播噪声舒适度也显着提高。此外，隔振器的高阻尼性能抑制了由垂直和水平低频道路振动引起的共振影响。因此，这种土工合成材料隔离器对于邻近地铁交通的建筑物的基础隔离是可行的。隔离器的高阻尼性能抑制了由垂直和水平低频道路振动引起的共振影响。因此，这种土工合成材料隔离器对于邻近地铁交通的建筑物的基础隔离是可行的。隔离器的高阻尼性能抑制了由垂直和水平低频道路振动引起的共振影响。因此，这种土工合成材料隔离器对于邻近地铁交通的建筑物的基础隔离是可行的。