Project owner, Chennai Metro Rail Ltd. (CMRL), and contractor, Tata Projects Ltd have celebrated the breakthrough of its 6.61m diameter Terratec EPBM at Otteri Station, marking completion of its first bore on the 116.1km Chennai Metro Rail Phase-II Corridor 3 project in India.
The Terratec EPBM S81B “Kolli,” along with six other TBMs, will play a pivotal role in the construction of approximately 9km of twin tunnels (totalling 18km) for Corridor-3’s underground section, extending from Venugopal Nagar Station to Kelly’s Station. The TBM was launched from Chennai Metro Line-3’s Ayanavaram Station South Shaft in July 2023 and achieved its breakthrough after 13 months of continuous operation, excavating 903m of up-line towards Otteri Station.
This project marks a significant step forward for the Chennai Metro Rail network, as the underground section will connect vital areas of the city and provide a fast and efficient transportation solution. Terratec has supplied five of the seven TBMs required for this critical package.
The Chennai Metro Project Phase 2 – Corridor 3, Package – TU01 encompasses a complex range of construction tasks, including diaphragm walls and the creation of entry and exit structures for Madhavaram Milk Colony Station, Murari Hospital Station, Ayanavaram Station, and Purasaiwakkam High Road Station. Additionally, the project involves the establishment of launching and retrieval shafts at these stations. The project also faces the challenge of tunnelling beneath historical structures in densely populated areas.
The TBMs are equipped with versatile mixed-ground dome-style cutterheads that effectively handle various geological conditions, including sand, silt, clay, and weathered rock. The TBMs progress with the installation of 1,400mm wide and 275mm thick universal reinforced concrete lining rings, comprising five segments and a key.
Chennai, a city grappling with rapid population growth and escalating traffic congestion, urgently needed a modern and efficient public transportation system. To address this pressing need, the Tamil Nadu government launched the ambitious Chennai Metro Rail Project, aiming to provide residents with a convenient, affordable, and reliable means of transport. This major undertaking is scheduled for completion within a demanding four-year timeframe.
In addition to “Kolli,” other Terratec TBMs have also achieved breakthroughs on the project. TBM S96 achieved its breakthrough in August 2023 at Madhavaran High Road, while TBM S98 accomplished its breakthroughs in June 2023 and June 2024, at Venugopal Nagar Station (of Line-5) and Otteri Station respectively. TBM S99 also celebrated its breakthrough in September 2023 at Venugopal Nagar Station.
Terratec
Incorporated 30 years ago, TERRATEC is one of the world’s leading designers and manufacturers of Tunnel Boring Machines, encompassing all...
More Information | info@terratec.co | +852 3169 3660
Comments: