Soft soil Treatment for Large Coal-fired Power Plant

1.PrefaceLargecoal-firedp0werplantsdesignedbyECEPDIarewidelydistributed0verthecountry.Sincethesepowerplantsrequirealotofcoolingwater,mostofthemarel0catedatbank0fbigrivers,0rlocatedatseacoasts.Thesoilofthesiteatriverbankisoftencomposedoffluvialdepositofriverdelta,whilethatofthesiteatc0astalregionis0ftencomposedofshoredep0sit.AlargethicknessoflooseQuaternarydep0sitsexistsintheseregions.Thes0ilatthedepth0f3~20m0rmoreissoftclayeys0ilwithhighcompression,highsensitivity,lowstrengthandlowpermeabi…

Soft soil Treatment for Large Coal-fired Power Plant

This paper describes the engineeringapplication of soil improvement in manylarge coal-fired power plants designed byEast China Electric Power Design Institute.Soil improvement technology is especiallysuitable for strengthening soft soil. Exceptfor increasing soil bearing capacity andcontrolling soil deformation, it can also beused to eliminate loose sand liquefactionunder seismic loading, or to strengthen slopestability. The applications introduced in thispaper include dynamic consolidation,drained consolidation, stone pile, soil-cement mixed pile, jet grouting andcompacting grouting, reinforced earth, etc.The kinds of soil layer to be improvedinclude typical Shanghai soft soil, loose siltand silt sand, miscellaneous fill andhydraulic filled soil. As a result of thetreatments described in this paper, nobuilding fissures caused by soil differentialsettlement had ever occurred in the powerplants engineered by ECEPDI andconstructed in 1990s.