DENGAN PERKUATAN KOLOM KAPUR DI LABORATORIUM

This paper presents the application of lime-column technique on soft clay soil. The research studied the strength distribution surround the installed lime-column and the load-settlement characteristic in laboratory. The lime-column was designed as single column with 50 mm in diameter (D), and the depth was 200 mm. The laboratory tests carried out were unconfined compression strength test, cone penetration test, and small plate loading test. The soil and lime-column was prepared in a steel box sized of 1.2 m width x 1.2 m length x 1 m height. The test results show that the lime-column contributes to enhance the soil strength in radial and vertical direction up to 3xD from the center of lime-column. It was also observed that soil strength tends to increase with time. The bearing capacity of the soft soil increased from 0.23 kN to 5.2 kN after the limecolumn was installed. For designing the lime-column grid, it was recommended that the spacing between lime-column was 4 times the column diameter.