Electricity supply is very important to improve people's lives. In Indonesia electricity
is mostly generated by PLN as the state company that provide electricity for the entire
people of Indonesia. PLN's load is very high to provide electricity and to reduce the load
of PLN, the potential of the electricity source should be utilized. One of the locations that
have been built and used for micro-hydro power plant is the irrigation canal in the Tangeb
village, Mengwi, Badung, Bali. Since it was built in 2014, micro-hydro power plant is
expected to be used to provide electricity to the Pura Dalem within 100 meters from the
power plant site, but can not function as expected because some parts of the structure were
damaged, particularly on the foundation. In order for micro-hydro power plants can be
used there should be analysis of the feasibility of existing structures.
The research process begins with a review of the research sites, further soil sampling
and ground testing in the field. The soil samples were tested in the laboratory. The test
results of soil samples in the laboratory and field testing is used to calculate the carrying
capacity of the land. The results of the soil bearing capacity were used to design the
foundation. Analysis of the framework turbine is also conducted to determine whether the
order turbines can still be used. Measurement of flow velocity is also performed to
calculate the flow rate so that the electrical potential can be known.
The results of the analysis of the feasibility of power plant micro-hydro in the Tangeb
village obtained subgrade on the location of the turbine has a high bearing capacity that
obtained the lowest allowable bearing capacity (qall) = 36.763 t/m2 based on test results
in the laboratory, and the position of the hard soil in 1 meter depth. For steel frame buffer
turbines, based on the results of the analysis with 9.7 ETABS program obtained that
turbines are qualified or steel frame secure enough to support the movement of the turbine.
The foundation of the turbine needs to be fixed with shallow foundation with a size of 0.95
m x 0.95 m, with a thickness 0.3 m and foundation depth of 1 meter. Reinforcement of
foundation used for tension reinforcement φ 12 with a distance of 9 cm between the
reinforcement and shrinkage reinforcement φ 12 with a distance of 18 cm. Potential
electricity or power can be produced based on the calculation of the speed of the water,
the water discharge resulting in low water level conditions is (W) = 3.3 kW.
Keyword: micro-hydro, soil bearing capacity, foundation desig