无砂砼小桩后处理湿陷性黄土路基的机理研究

A Study on the Treatment Mechanism of Small Non-sand Concrete Pile Post-processing Collapsible Loess Region Roadbed

分析了无砂砼小桩后处理湿陷性黄土地区高填方路基的处理机理,指出无砂砼小桩后处理法通过施工过程中的成孔和注浆工艺,对湿陷性黄土地基进行预湿、预压处理,由高填方路基预加荷载提供黄土湿陷起始应力,注浆过程中使桩孔周围的部分黄土提前发生湿陷变形,从而使黄土结构的湿陷性得到显著改善,土体结构的水稳性得到保证.

This paper analyzes the treatment mechanism of small non-sand concrete pile post-processing in collapsible loess region roadbed high fill, pointing out that small non-sand concrete pile after the adoption of the law dealing with the construction project of drilling and grouting process, the collapsible loess foundation for pre-wet, surcharging handled by the high fill sub-grade to provide pre-loading contained initial collapsible stress, grouting process will move around the pile hole early part of the loess occurred collapsible deformation, so that the collapsible of the loess structure have significantly improved and the water stable of the soil structure be guaranteed.