Building Information Modelling (BIM) has been a trending topic in the construction industry, involving the sharing of information through a single model that integrates all relevant data. BIM is a digital representation of the physical and functional characteristics of a facility, creating a shared knowledge base that serves as a reliable foundation for decision-making throughout its lifecycle—from initial conception to demolition.
Although BIM is extensively used in international projects, its adoption in India has been relatively slow, especially in remote and restricted nuclear power projects. L&T has taken on the challenge of implementing BIM in a nuclear power plant, setting a benchmark for digital adoption in the nuclear construction industry.
Methodologies such as 3D and 4D modelling, Field BIM, and Virtual Reality are being implemented at KKNPP, utilizing software like Revit, BIM 360, Bexel Manager, and Twinmotion effectively on-site.
Key Benefits of BIM
- Enhanced Visualization – Site engineers gain a comprehensive understanding of the structure before construction begins.
- Improved Safety Awareness – Potential hazards, such as height-related risks and congestion, are identified through the model.
- Business Strategy Advantage – Implementing BIM in the restricted nuclear construction industry strengthens L&T’s technological edge and competitive positioning.
To successfully adopt BIM in such a challenging environment, we developed a streamlined and collaborative workflow to support the site team effectively. The key methodologies and features implemented at our site are as follows:
1. 3D Modelling
The first step in BIM implementation is developing an accurate 3D model of the structure. L&T’s HCI EDRC team created a 3D model in Revit based on 2D working drawings, achieving an LOD 350 standard. This model was thoroughly reviewed by the site team to ensure dimensional accuracy.
2. Implementation of a Common Data Environment (CDE)
The 3D models are uploaded to a cloud platform called BIM 360, creating a Common Data Environment for seamless coordination among all stakeholders. BIM 360 provides tools such as distance measurement, sectional analysis, mark-ups, and issue tracking, which facilitate effective communication across departments.
3. Clash Detection
The 3D model integrates both structural and mechanical drawings, ensuring visibility of pipeline interfaces within the structure. This process identified multiple clashes between pipes and walls, allowing the site team to notify the client early. This proactive approach prevented rework, saving both time and cost.
4. 4D Monitoring
Project schedules were integrated with the 3D model using Bexel Manager, enabling visual representation of planned, forecasted, and actual progress. These insights were shared with stakeholders, including the client, for real-time monitoring. For the first time in L&T, the rebar model was also integrated into the schedule, creating a 4D animation for rebar orientation. This provided better clarity in delay analysis and progress tracking.
5. Virtual Reality
A BIM VR room was established on-site, allowing stakeholders to experience an immersive walkthrough of the 3D-modeled buildings using a Virtual Reality setup (HTC Vive) and supporting software (Twinmotion). This helped both engineers and client representatives visualize the structure before construction, enabling early detection of engineering challenges and safety concerns.
Additional Benefits of BIM
- Safety Enhancement – Potential safety hazards can be identified and mitigated before construction begins.
- Progress Monitoring – Detailed visual progress reports provide greater clarity and accuracy.
- Client Confidence – The BIM initiative gained recognition among client officials, boosting employee morale and stakeholder engagement. As a testament to its success, the client awarded a certificate of appreciation for implementing BIM at KKNPP.
- Competitive Edge – Implementing BIM in a restricted nuclear construction environment positions L&T as an industry leader. This example serves as a valuable case study to showcase BIM’s benefits to future clients.
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