The Research on Treating Collapsible Loess by Down Whole Deep Compaction and Cement Fly-ash Gravel

Abstract

The treatment of loess foundation is always diffcult. The analysis of itsadvantages and mechanism of treating loess foundation by CFG, on thebase of project geology, through construction example, we suggest thecompound plan by both DDC and CFG. The tests illustrates that the downhole deep compaction and cement-fly ash-gravel are effective foundationtreatment method to eliminate the collapsibility of loess, increase thebearing capacity and improve the behavior of composite foundations.