GROUTING METHOD FOR STRENGTHENING SLOPE STABILITY IN EMBANKMENT HANDLING ON CLAY SOIL HIGHWAY CASE STUDY SEMARANG-SOLO STA 4+250 – 4+600

摘要

Infrastructure development is a key factor for our national economic growth. One of this importantrninfrastructure is the development of toll road construction. In this construction sometimes the locationrnhas an unpredictable relief, so it need cut and fill on it. This processes will generate a new sloperngeometry that need to be analyzed and calculated for its stability. The place of study is on toll roadrnSemarang-Solo STA 4+350 - 4+600. The safe category of slope if security factor value ≥ 1.4. From thernresult of this investigation, the security factor value is 0.74, where this value isn’t safe yet so it need anrnincreasing of the soil strength. Grouting method is selected because it has more advantages. From thisrnsimulation result using geostudio application, grouting method could increase soil strength up to 1.602rnwith the increasing of cohesion is about 20 Kpa. We also compare this method with other method andrnthe result is grouting method could increase soil strength and tend to be cheaper.