Togani Cahyadi Upomo, Abdul Kholik Romarchan, Rini Kusumawardani
In 1900 to 1980 small earthfill dam built in Indonesia. The dam still functioning well but some of them need to be repaired because of seepage problem in the body and foundation of the dam. Grouting is one of the method to control the seepage. Grouting done by fill or inject fluid with pressure into the ground through a borehole to reduce the permeability and increase the shear strength. The study was done by comparing the permeability of the before and after grouting. Parameters for determining permeability with the use value of the lugeon test, whereas permeability measurement using packer permeability test. The material used as an injection material was Portland Cement (PC) and water with the initial mixture of 1: 4 and would be thickened into 1: 2 and 1: 1 mixture in a sequence. The use of Grouting was proven to reduce seepage that occurred in the dam by referring to Lugeon value before grouting was between 24.15 to 1123.08, some holes even experienced water loss. Meanwhile, Lugeon value after Grouting was 1.50 to 6.96.
Faculty of Engineering, Universitas Negeri Semarang, Semarang, 50229, Indonesia
