Pembangunan infrastruktur di Kabupaten Tana Tidung sedang giatnya dilakukan terutama bangunan pemerintah sebagai tempat penyelenggaraan pemerintahan dan pelayanan pada masyarakat sebagai sarana penunjang terselenggaranya proses pemerintahan. Tujuan dari penelitian ini adalah untuk membandingkan nilai daya dukung izin pondasi tiang pancang dengan penyelidikan SPT, CPT dan Uji Laboratorium pada proyek pembangunan gedung Gabungan Dinas II Kabupaten Tana Tidung. Perhitungan daya dukung izin pondasi tiang pancang penyelidikan SPT menggunakan metode Mayerhoff dan Luciano Decourt, penyelidikan CPT menggunakan metode Bagemann dan Wesley untuk penyelidikan Uji Laboratorium menggunakan metode Alpha dan Tomlinson. Berdasarkan penelitian hasil perbandingan nilai daya dukung izin pondasi tiang pancang untuk SPT diperoleh pada titik analisa 1 kedalaman 18 m sebesar 59,88 ton, titik analisa 2 kedalaman 23 m sebesar 32,35 ton, titik analisa 3 kedalaman 20 m sebesar 44,81 ton dan pada titik analisa 4 kedalaman 26 m sebesar 19,38 ton. CPT/Sondir diperoleh pada titik analisa 1 kedalaman 18 m sebesar 43,40 ton, titik analisa 2 kedalaman 23 m sebesar 74,59 ton, titik analisa 3 kedalaman 20 m sebesar 48,47 ton dan pada titik analisa 4 kedalaman 26 m sebesar 143,56 ton. Uji Laboratorium diperoleh pada titik analisa 1 kedalaman 18 m sebesar 47,40 ton, titik analisa 2 kedalaman 23 m sebesar 15,81 ton, titik analisa 3 kedalaman 20 m sebesar 19,17 ton dan pada titik analisa 4 kedalaman 26 m sebesar 23,01 ton.

Infrastructure development in Tana Tidung Regency has been actively made, especially related to the government buildings as the places for government administration and services for public as a means to support the implementation of the government processes. The purpose of this research was to allowable bearing capacity of pile foundation examined with SPT, CPT, and Laboratory Test on the joint building construction project of Tana Tidung Regency Office II. The calculation of allowable bearing capacity of pile foundation respectively investigated with SPT used the Mayerhoff and Luciano Decourt methods, with CPT used the Bagemann and Wesley methods, and with Laboratory Test used the Alpha and Tomlinson methods. Based on the comparison results, the value of allowable bearing capacity of pile foundation investigated with SPT was obtained at the analysis point 1 at the depth of 18 m by 59.88 tons, analysis point 2 at the depth of 23 m by 32.35 tons, analysis point 3 at the depth of 20 m by 44.81 tons, and analysis point 4 with the depth of 26 m by 19.38 tons. Meanwhile, that with the CPT/Sondir was obtained at the analysis point 1 with the depth of 18 m and the weight of 43.49 tons, analysis point 2 at the depth of 23 m by 74.59 tons, analysis point 3 at the depth of 20 m by 48.47 tons, and analysis point 4 at the depth of 26 m by 143.56 tons. In addition, that with the laboratory test was obtained at the analysis point 1 with the depth of 18 m by 47.40 tons, analysis point 2 at the depth of 23 mby 15.81 tons, analysis point 3 at the depth of 20 m by 19.17 tons, and analysis point 4 at the depth of 26 m by 23.01 tons.