Collapsible Loess Roadbed Of High-grade Highways Processing Technology Research

In accordance with the construction of Xi'ning-Huangyuan first class highway and Machangyuan-Ping'an high-speed highway, based on a good deal of investigation, this paper studies the geologic character and the main physical mechanics of the collapsibility loess in Qinghai. This paper also studies the foundation treatment effect with dynamic consolidation, impact rolling, lime pile and lime-soil cushion. To dynamic consolidation, much attention is given to the relationship between the ramming energy and the effective depth. To rolling cushion, the effect at each depth is emphasized. Finally, this paper gives some advice on the treatment method according to the different collapsibility loess foundation.