Ranchi, India –The capital city of Ranchi is located in the heart of the eastern Indian state of Jharkhand. With a population of over one million, the city is also known as the “City of Lakes and Waterfalls” due to the numerous waterfalls in the immediate vicinity. Due to the constant growth of the population, the need for infrastructure is also increasing accordingly. A four-lane overpass is currently under construction to handle the high volume of heavy traffic to the Ranchi station and to reduce congestion. In the future, this will also cross existing railway lines and watercourses. The special thing about it: its design as a cable-stayed bridge. For this construction project, BAUER Engineering India Pvt. Ltd., a subsidiary of BAUER Spezialtiefbau GmbH, from M/s. Larsen & Toubro Transportation Infrastructure contracted to fabricate the necessary piles. Bauer India started work in October 2022.
2,000 mm and 1,200 mm diameter piles
In the first phase of the project, Bauer produced a total of 50 piles with a diameter of 2,000 mm. “The largest monopiles that BAUER Engineering India Pvt. ltd ever manufactured in the Indian region,” explains Ankuh Mehra, project manager at Bauer India, proudly. “The highlight of this project and a real sensation for us.” In the second phase, 100 piles with a diameter of 1,200 mm were manufactured. All piles are made with a 4 m rock connection, the pile lengths range between 15 m and 22 m. While a BAUER BG 40 is used to create the piles with a diameter of 2,000 mm, the piles with a diameter of 1,200 mm are driven with a BG 28, among other things and BG 26 drilled.
Precision work in the tightest of spaces
The logistics pose a major challenge: there is a high volume of traffic around the construction site and the pile locations are also in the middle of the road. The roadblocks are up to 9 m long and significantly restrict the mobility of the drilling rigs and cranes. Due to the difficult environmental conditions, extreme caution was required from the outset. “Good planning and organization are everything in such conditions,” says Ankuh Mehra.
The work is expected to be completed by the end of April. “We are very well on schedule, so we assume that we will finalize the project according to plan,” says Ankuh Mehra.
What was BAUER India's role in the construction of the four-lane flyover?
BAUER India was responsible for manufacturing large bored piles for the four-lane flyover. They installed a total of 68 bored piles with diameters ranging from 1.2 to 2.0 meters and depths of up to 50 meters, using two BG 28 drilling rigs. This challenging project required careful planning and execution to meet the requirements of the congested urban setting and ensure the structural stability of the flyover.
What are the advantages of using large bored piles in flyover construction?
Large bored piles offer several advantages in flyover construction, including high load-bearing capacity, minimal noise and vibration during installation, and the ability to penetrate through various soil types and obstructions. They provide a stable and durable foundation for the flyover, ensuring long-term structural integrity and safety. Additionally, bored piles can be customized to meet the specific requirements of each project, making them a versatile and efficient foundation solution.