Abstract
To build a building on a hilly area have to be started with properly soil investigation and properly geodetically survey. Ignored those investigation and survey will hurt, the building can collapse or land sliding can occur. The incident of high landfill sliding occurs in a building construction located in Tembalang Semarang. The building was constructed over the more than seven meters height of landfillwith very steep of slope horizontal to vertical was 1 : 4 without preceded with properly soil investigation and geodetically survey. This paper reported that incident and come up with the cause of slope sliding and analyzed as well as the effort to solve it. In the analysis was found out about that the landfill was constructed without preceded with properly planning and design which conducted based on the data of soil investigation and geodetically survey. From the analysis were known that slope sliding because of landfill constructed in dry season where void in the soil was 0% of water fully filled with air. When heavy and long rain was fall, the void filled with water, unit weight of soil increase and because of weight of building construction over the landfill, and because of the steep of slope, landsliding cannot be avoided. To solve that problem, grouting technique using cement was performed. The result show satisfied that the sliding can be stopped.
Keywords: Landfill, Steep slope, Land- Sliding, Soil investigation, Cement-Grouting,