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Mechanism Analysis of GSPS System Strengthening Soft Base

机译:GSPS系统强化软基的机理分析

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This paper analyzes the mechanism of geogrid-broken stone pile reinforced sand-gravel cushion soft base strengthening system (GSPS) using finite element based on the substantial project of a expressway in Sichuan province. The calculation results indicate that the GSPS system can significantly improve the vertical displacement (settlement) of subgrade with the vertical displacement around pile decreasing around 15%, and the subgrade displacement tends to be more uniform and smooth. Also, the GSPS system improves the horizontal displacement of subgrade the most compared with the common broken stone-pile, sand cushion and reinforced cushion. The embankment becomes relatively light when it is low, and the main top loads are bome by geogrid-broken stone piles. With the top loads increasing, the loads shift to the soil among piles, and the pile-soil stress ratio increases with the increase of stress level. The test and analysis results show that the value range of pile-soil stress ratio is 1.88-3.40.
机译:本文采用了基于四川省高速公路实质性项目的有限元的地理碎石碎石桩加固砂砾垫软基强化系统(GSP)的机理。计算结果表明,GSPS系统可以显着提高路基的垂直位移(沉降),垂直位移约为15%左右的垂直位移,路基位移趋于更均匀和光滑。此外,与公共破碎的石桩,砂垫和增强垫相比,GSPS系统的水平位移最多。当它较低时,堤坝变得相对较轻,主要的顶部负载是由地质格栅破碎的石头桩的BOME。随着顶部载荷的增加,负荷转移到桩之间的土壤,并且桩土应力比随着应力水平的增加而增加。测试和分析结果表明,桩土应力比的价值范围为1.88-3.40。

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