On the morning of June 21, the No. 2 Tunnel for Jakarta-Bandung HSR in Indonesia was successfully dug through, marking another significant progress in the project construction. So far, all the 13 tunnels were completed throughout the whole line, laying a solid foundation for the opening of the line in June 2023.
The railway line is designed with 13 new tunnels, totaling up to 16,643 meters. The land crossed by the tunnels is geologically dominated by clay, ooze, and sandstone, and covered with thin overburden. Therefore, given high possibility of unstable tunnel structure, deformation, collapse, and many other hazards, huge difficulties had to be overcome and high risks to be avoided during the construction. The No. 2 tunnel, located in Purwakarta, West Java Province, Indonesia, was designed as a single-hole double-track tunnel, for totally 1,052 meters and at a maximum burial depth down to 53.6 meters. As one of the critical works for the construction of the whole line, its construction process was accompanied by frequent incidents such as tunnel deformation, collapse, and mud gushing.
Since the all-around construction of Jakarta-Bandung HSR kicked off in 2018, China Railway International Co., Ltd., a CR subordinate, has led the Chinese construction consortium to actively overcome the impact of the epidemic and take specific measures targeting the complicated hydrogeological conditions and construction difficulties. They mobilized professional construction crew and machinery from various sources, optimized construction organization, applied innovative processes and approaches, and tightened safety and quality control, making massive efforts in the completion of all the13 tunnels.
So far, with all the tunnels and culverts completed, and the civil works of subgrade, bridges and stations completed by more than 90%, the track laying and bridge erecting have been in full swing, mainly including the erection of box girders and the laying of ballastless track, setting the stage for the full completion and opening of the whole line.
Stretching 142 kilometers totally from Jakarta, the capital of Indonesia, to Bandung, the fourth largest city in Indonesia, and with a maximum design speed of 350 kilometers per hour, Jakarta-Bandung HSR is a landmark Belt and Road Initiative project under pragmatic cooperation between China and Indonesia, and signifies the first systemic HSR footprint of China incorporating the total elements and whole supply chains. After the completion of the project, the travel time from Jakarta to Bandung is expected to be shortened from more than 3 hours to 40 minutes, which is of great significance to boosting Indonesia’s economic and social development, deepening the cooperation between China and Indonesia, and advancing the high-quality development of the Belt and Road Initiative.
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