Dalam perencanaan fondasi perlu diperhitungkan nilai daya dukung baik daya dukung aksial maupun lateral beserta penurunan segera yang terjadi. Pada penelitian ini menganalisis daya dukung dan penurunan fondasi bored pile pada proyek Tower T.026 Saluran Udara Tegangan Ekstra Tinggi 500 kV Tx (Ungaran - Pedan) - Batang Section 1 berdasarkan data Standard Penetration Test (SPT) dengan menggunakan metode Meyerhof dan O'Neill Reese untuk analisis daya dukung aksial, metode Broms untuk daya dukung lateral, dan metode Vesic untuk penurunanya. Dalam analisis ini digunakan tiga variasi diameter tiang diantaranya yaitu diameter 40 cm, 60 cm dan 80 cm dengan kedalaman tiang yaitu 20 m. Dari hasil analisis diperoleh nilai daya dukung aksial dengan menggunakan metode Meyerhof sebesar 11829,2911 kN untuk diameter 40 cm, 12000,7505 KN untuk diameter 60 cm, dan 11668,2470 kN untuk diameter 80 cm. Kemudian dengan menggunakan metode O'Neill Reese yaitu sebesar 10923,2051 KN untuk diameter 40 cm, 12736,6854 kN untuk diameter 60 cm, dan 11657,9300 KN untuk diameter 80 cm. Berdasarkan hasil analisis maka dipilih fondasi bored pile dengan diameter 40 cm berdasarkan analisis menggunakan metode O'Neill Reese dengan nilai daya dukung aksial sebesar 10923,2051 kN, nilai daya dukung lateral sebesar 441,5581 KN, serta penurunan segeranya dinyatakan aman sebesar 0,0793 m.

In foundation design, it is essential to consider both axial and lateral bearing capacity, as well as immediate settlement. This study analyzes the bearing capacity and settlement of bored pile foundations for Tower T.026 of the 500 kV Extra High Voltage Transmission Line (Ungaran - Pedan) - Batang Section 1, based on Standard Penetration Test (SPT) data. The axial bearing capacity is analyzed using the Meyerhof and O'Neill Reese methods, the lateral bearing capacity using the Broms method, and the settlement using the Vesic method. This analysis considers three pile diameter variations: 40 cm, 60 cm, and 80 cm, with a pile depth of 20 m. The results show that the axial bearing capacity using the Meyerhof method is 11,829.2911 kN for a 40 cm diameter, 12,000.7505 KN for a 60 cm diameter, and 11,668.2470 kN for an 80 cm diameter. Using the O'Neill Reese method, the axial bearing capacity is 10,923.2051 kN for a 40 cm diameter, 12,736.6854 KN for a 60 cm diameter, and 11,657.9300 kN for an 80 cm diameter. Based on the analysis, the 40 cm diameter bored pile was selected as the foundation, using the O'Neill Reese method, with an axial bearing capacity of 10,923.2051 kN, a lateral bearing capacity of 441.5581 kN, and an immediate settlement of 0.0793 m, which is considered safe.

In foundation design, it is essential to consider both axial and lateral bearing capacity, as well as immediate settlement. This study analyzes the bearing capacity and settlement of bored pile foundations for Tower T.026 of the 500 kV Extra High Voltage Transmission Line (Ungaran - Pedan) - Batang Section 1, based on Standard Penetration Test (SPT) data. The axial bearing capacity is analyzed using the Meyerhof and O'Neill Reese methods, the lateral bearing capacity using the Broms method, and the settlement using the Vesic method. This analysis considers three pile diameter variations: 40 cm, 60 cm, and 80 cm, with a pile depth of 20 m. The results show that the axial bearing capacity using the Meyerhof method is 11,829.2911 kN for a 40 cm diameter, 12,000.7505 KN for a 60 cm diameter, and 11,668.2470 kN for an 80 cm diameter. Using the O'Neill Reese method, the axial bearing capacity is 10,923.2051 kN for a 40 cm diameter, 12,736.6854 KN for a 60 cm diameter, and 11,657.9300 kN for an 80 cm diameter. Based on the analysis, the 40 cm diameter bored pile was selected as the foundation, using the O'Neill Reese method, with an axial bearing capacity of 10,923.2051 kN, a lateral bearing capacity of 441.5581 kN, and an immediate settlement of 0.0793 m, which is considered safe.