Soil liquefaction during large earthquakes causes serious damage to structures built on foundations. In recent years, artificially injecting small amounts of air into liquefaction-susceptible soils has been proposed as a newly developed and cost-effective liquefaction mitigation method. Nevertheless, the liquefaction response of piles through this method has not been investigated so far. A series of 1g shaking table tests were conducted in this research to evaluate the liquefaction response of pile and pile group in air-injected partially saturated soils. The results have shown that air injection effectively reduces the liquefaction-induced settlements of pile and pile group. Also, this method has relatively reduced the excess pore pressure ratio. According to visual results and bending moments in piles, the depth of a liquefied soil layer decreases in air-injected partially saturated soils. Also, the deformation of soil structure is observed to decrease by injecting air into the samples. Despite these effects, larger accelerations are transmitted to the surface of the soil and consequently to the structure, and larger bending moments are applied to the piles in air-injected partially saturated samples. It was observed that at the low confining pressure, the effectiveness of this method is not a function of air injection duration.

大地震期间的土壤液化会严重破坏基础上的建筑物。近年来，已经提出了将人工空气少量注入易液化土壤中的方法，作为一种新近开发且具有成本效益的液化缓解方法。然而，到目前为止，尚未研究通过这种方法进行桩的液化响应。一系列1克在这项研究中进行了振动台试验，以评估注水的桩和桩组在部分注入空气中的液化响应。结果表明，注空气有效地减少了液化引起的桩和桩群沉降。而且，该方法已经相对降低了多余的孔隙压力比。根据视觉结果和桩的弯矩，注气的部分饱和土壤中液化土层的深度减小。另外，通过向样品中注入空气，可以观察到土壤结构的变形减少了。尽管有这些影响，但更大的加速度会传递到土壤表面，进而传递到结构，并且更大的弯矩会施加到空气注入的部分饱和样品中的桩上。