By Nitu Shukla, DGM – Corporate Planning, POWERGRID
The transmission sector is playing a significant role in the country’s energy transition through renewable energy integration. With significant investments in the sector, transmission construction projects are crucial for expanding energy infrastructure. However, they come with their own set of unique challenges. The sheer scale of work requires massive manpower for smooth execution. Additionally, stringent timelines, tough terrains and demanding working conditions further amplify the complexity of these projects.
Mechanisation in transmission construction not only addresses manpower shortages but also helps reduce the overall construction cycle, enhances worker safety and facilitates operations in challenging terrains. The mechanical construction scheme of transmission lines has a profound influence on project costs, construction timelines, labour safety and environmental protection requirements.
The need for mechanisation is driven by critical factors:
- Speed and efficiency in large-scale projects to meet tight deadlines.
- Enhanced worker safety through reduced manual labour risks.
- Cost-effectiveness over traditional construction methods.
- Improved precision and quality control, ensuring consistent project standards.
- Potential areas of mechanisation in transmission construction
- Mechanisation can be strategically implemented across several stages of transmission construction, streamlining operations and optimising resources.
Land surveying
Accurate and efficient surveying forms the backbone of successful transmission line projects. Light detection and ranging (LiDAR) technology has revolutionised this domain. A remote sensing technology, LiDAR uses laser to measure distances to objects or surfaces, providing comprehensive survey data along transmission routes with utmost accuracy and high-density point measurements. This minimises field inspection requirements while delivering real-time terrain mapping, enabling precise planning and resource allocation.
Route optimisation using 3D technology
Choosing a reasonable path is critical for controlling costs and timelines. 3D simulation platforms provide innovative solutions for route planning and optimisation. These platforms enable engineers to accurately determine route directions, tower arrangements and corridor space in crowded areas, greatly enhancing design accuracy and reducing working time. In densely populated regions, combining 3D platforms with optimised channel usage delivers even more impactful results.
Foundation works
Automated tools like rebar benders, cutters and tying machines significantly reduce manual labour and expedite reinforcement processes. Batching plants and transit mixers deliver consistent concrete quality, while boom pumps and concrete pumps streamline the direct the pouring of concrete into deep foundations. Precast foundations emerge as a particularly advantageous solution in locations where accessibility is not a challenge, saving significant construction time. The introduction of couplers for pile cage rebars further enhances efficiency. Traditionally, rebars are overlapped and welded, which increases consumption and costs while taking additional time. Couplers eliminate these drawbacks, offering notable advantages such as reducing the time for construction activities.
Assembly and erection of tower components
Mechanisation simplifies the assembly and erection of transmission towers, addressing the challenges posed by labour shortages and complex terrains. The use of battery-operated electric torque wrenches speeds up the tightening of thousands of bolts required for each tower, reducing time consumption and manual effort. Additionally, mobile cranes facilitate faster erection of towers, although they come with their own set of challenges, such as accessibility issues in hilly terrains, difficulty in movement between low tension lines, and crop damage requiring compensation.
Stringing of conductors
Mechanised stringing equipment ensures precision and efficiency in conductor installation, further optimising the construction cycle.
Challenges and strategic measures
While mechanisation offers transformative benefits, it also presents certain challenges, such as skilled labour requirements and accessibility issues in rugged terrains. Addressing these challenges requires a strategic approach, including investments in upskilling the workforce to operate advanced machinery and collaborations with technology providers to adapt solutions to the unique demands of transmission construction
Conclusion
As the industry continues to grapple with complex demands, embracing mechanisation is not merely an option – it is an imperative. This shift toward technological advancement lays the foundation for a resilient and future-ready infrastructure, ensuring the successful delivery of transmission projects that meet the evolving energy needs of the country.