The comparison study of the monopole tower foundation using CPT and laboratory data in Gresik district, East Java-Indonesia

In the millennial era, development of information and communication technology is very fast, one telecommunications infrastructure a monopole type tower. This tower 3 types telecommunication towers whose main construction made steel. The structure supported by tread foundation, which shallow foundation. factor in design foundation bearing capacity factor. Calculation can be done directly field using Sondir data (CPT) indirectly laboratory data. this study was conducted to compare carrying foundations between methods form or CPT with result Soil tests calculated Terzaghi formula. research location carried out Gresik Regency, East Java Province, Indonesia at sites, namely: Mojosarirejo, Kembangan Kebomas Setromenganti. results comparison calculation (Q) Mojosarirejo site sandy soil. value QSondir < 9.58 % Qterzaghi. At Krembangan brown clay gravely clay, Q 69.93 Qterzaghi Setromenganti soil influence water level depth – 1 m, 27, 62% From average locations, treads 26.50 smaller than Qterzaghi, so use more accurate for planning provides greater security assurance structure.