地下结构物对饱和砂土地基液化的影响

以我国东南沿海地区砂土地层大型地铁站为背景,进行了自由场和埋设地下结构物的饱和砂土地基动力离心模型试验,对比分析了强震作用下两种模型不同深度的地基加速度、超孔隙水压力及地基沉降等变化规律,数据结果显示埋设地下结构物的饱和砂土层地基相比于自由场相同位置的砂土层地基更易发生液化,提升了人们对地下结构物影响砂土液化效果的认识.

The Effect of Underground Structures on Sandy Soil Liquefaction

Based on the background of large subway station of Southeast coastal of China in the sandy soil, two groups of centrifuge dynamic tests on saturated sand deposits with and without underground structure model were performed. The results of acceleration, excess pore water pressure in different depth and the settle- ment of foundation were analyzed. The results showed that the sand foundation with the underground structure model is more likely to liquefy in the same depth.