Global Finance | China-made tunnel boring machines set a new daily excavation record of 61.73 meters in Lesotho.
Release time:
2025-08-13
Abstract
Xinhua Finance, Johannesburg 10 Moon 14 Xinhua News Agency, Maseru: Recently, at the second phase of the Lesotho Highlands Water Project—the Polihali water conveyance tunnel project—China Communications Construction Company Tianhe’s independently developed... “ Dayu Changfeng Ship ” Tunnel boring machine daily excavation 61.73 Rice, refreshed 5 Daily tunneling record for a meter-class dual-shield TBM.
The Polihali Water Diversion Tunnel Project is the largest bilateral infrastructure project between Lesotho and South Africa, with a water pipeline approximately [length not specified in original text] long. 34.4 kilometers. The geological conditions of the mountain where this project is located are extremely complex, placing high demands on the stability of tunnel excavation and the wear resistance of the tunnel-boring machine’s cutterheads.
Two tunnel boring machines from CCCC Tianhe are involved in this project. Currently, “ Dayu Snow Shield Ship ” It has also entered the critical stage of on-site assembly. The two pieces of equipment are starting from opposite ends of the tunnel, advancing toward each other in a bidirectional, head-on excavation approach—each undertaking approximately... 17.2 A tunneling task spanning several kilometers. This construction method can significantly shorten the project duration.
Based on the complex geological conditions of the project, CCCC Tianhe conducted targeted designs for the two tunnel boring machines. By employing finely tuned equipment control and scientifically adjusting tunneling parameters, as well as rigorously implementing operations such as tool wear monitoring, we ensured that this tunnel—with a diameter exceeding— 5 Rice, long 425 Rice, weight 1500 Large-scale equipment weighing tons is operating stably.
In recent years, CCCC Tianhe has been committed to expanding its overseas markets. Its tunnel boring machine products are now sold to countries including Bangladesh, Indonesia, Malaysia, Japan, Singapore, the Philippines, Thailand, and Russia, demonstrating... “ Made in China ” its outstanding performance also supports China's infrastructure development. “ Go out. ” Provided important technical support.
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