As prospective civil engineers, students are not only required to understand the theory in the classroom but also to see firsthand how construction technology is applied in the field. One valuable experience was a field trip to witness the rotation of a pier head using Sosrobahu technology. 

Sosrobahu is a construction engineering innovation invented by Ir. Tjokorda Raka Sukawati in 1988. The Sosrobahu invention wasn't the result of lengthy laboratory planning, but rather the fruit of simple observations and the engineer's meticulous observation of everyday phenomena. This technology allows the pier head of a bridge or overpass to rotate up to 90 degrees without disrupting traffic below. Its working principle utilizes hydraulic pressure, which creates a thin layer of oil as a cushion, allowing the pier head to rotate easily.

This technology has proven to be very useful in the construction of flyovers in large cities with heavy traffic, such as Jakarta, and has been recognized internationally. A total of 30 Civil Engineering students from Janabadra University accompanied by 3 supervising lecturers visited the Solo-Jogja Toll Road Section II Package 2.2 project carried out by PT Adhi Karya (Persero) Tbk. The project, which is located above the North Ringroad of Jogja city, more precisely around the UGM Academic Hospital where traffic is heavy and is one of the main routes in Jogja, requires the right implementation technology and the choice of using Sosrobahu is the solution.

This activity aims to provide a real understanding of the implementation of Sosrobahu technology, demonstrate the technical process of rotating pier heads directly, relate theories learned in class, such as mechanics, reinforced concrete, and construction techniques, with practice in the field and foster a sense of appreciation for the work of the nation's children in the field of civil engineering.

During the visit, students witnessed several important stages including the preparation and installation of the hydraulic system at the bottom of the pier, the application of oil pressure until the pier head floats on a fluid cushion, the slow rotation of the pier head in a predetermined direction, usually 90 degrees, and the relocking of the pier head to stabilize it and prepare it for the next construction load. Seeing this process firsthand provides a much deeper understanding than simply reading literature or watching instructional videos.

This field trip provided significant benefits, including practical experience of modern construction technology, visual understanding of complex yet effective work methods, inspiration to innovate in the field of civil engineering by developing nationally produced technology, and increased awareness of the importance of efficient and environmentally friendly engineering, as Sosrobahu has been proven to reduce traffic jams and social disruption during construction. The pier head turning process, which was carried out at night, did not dampen the students' enthusiasm to pay close attention to each activity and explanation.