On any tunnelling site, precision is a crucial pillar alongside engineering and contracting operations. Picking the right formwork is a big deal in tunnel construction, shaping how sturdy, fast and budget-friendly a project turns out to be. If the formwork has faults, it can lead to project failure and result in disasters later on. 

As the leading tunnel formwork manufacturer in Siliguri, we at NPEC serve as a one-stop platform for the Government, EPCs, and Infra companies in India. This guide explains the most common tunnel formwork mistakes and ways to avoid them. 

5 Common Tunnel Formwork Mistakes to Avoid

Indian Construction Industry data evaluated in 2026 shows that rework from mistakes and design flaws accounts for 20% of total project costs. In Indian tunnel construction, mistakes often stem from improper sourcing, inadequate material quality and ineffective operational management. 

Here’s what you need to know about the common mistakes and how to avoid them: 

1. Inadequate Planning and Design

One of the biggest mistakes made while erecting formwork is poor planning and design. Most contractors undertake the erection of formwork without a proper understanding of the job’s actual demands, resulting in a poorly assembled assembly that does not fulfil the requirements. Proper planning should consider several elements, including load-bearing requirements and the characteristics of the concrete used.

Solution: Comprehensive Project Preparation

We emphasise the importance of setting a clear and precise roadmap, combined with engaging training sessions on formwork assembly techniques, which can significantly reduce the likelihood of project failure stemming from poor planning.

2. Poor Quality Control of Materials 

One mistake could be using materials that are not appropriate for the prevailing environment or applications. For example, some wood species may easily warp or shrink due to certain moisture and temperature conditions, thus affecting the integrity of the formwork system. Metal pieces may rust, and plastic formwork requires certain procedures to work properly.

Solution: Training to Site Personnel 

Our site personnel are professionally trained on the importance of adhering to materials specifications, which can significantly curtail the risk of using low-quality materials. As the best contractor for hydraulic tunnel formwork, we implement routine inspections and audits that further reinforce the standards required for materials selection.

3. Overlooking Safety Protocols 

Many project operators fail to follow necessary safety protocols, which can lead to risks of casualties, costly project delays, and legal repercussions. 

Solution: Enhanced Training Sessions 

We organise training sessions tailored to assembly formwork, focusing on situational awareness, PPE use, and emergency plans. Conducting a safety audit before the assembly process decreases the likelihood of potential accidents and ensures that all workers are aware of the safety measures. Promoting open communication in the team regarding safety issues helps prevent unsafe practices and actions.

4. Inadequate Alignment and Levelling

Misalignment can result in disastrous consequences, including miscalculation of load-bearing capabilities and unsightly surfaces. Many contractors often rush the alignment process, overlooking the impact of even the slightest misalignment on the outcome.

Solution: Investment in Operational Management 

Bracing and securing will ensure that the structure is stable and ready to withstand the pressures from concrete placement. Proper inspections need to be conducted before concrete placement to confirm that all components have been secured and properly positioned.

5. Ineffective Communication

Lack of effective communication can derail even the most well-planned formwork assembly projects. Discrepancies in the understanding of the assembly directives can lead to mistakes that ripple throughout the entire project.

Solution: Make End-to-End Communication

We encourage a culture of transparent communication that fosters collaboration, which can significantly diminish the potential for errors. We establish a protocol for documenting decisions to ensure that every stakeholder remains aligned with the project. 

Conclusion

If we are looking to change the construction industry, we have to go beyond just the surface to the decisions that will shape how a project turns out in the end. At NPEC, we act as a one-stop platform for tunnel formwork construction, sourcing, assembling and contracting for all EPCs, Infra companies, and Govt projects in India. 

As the best tunnel formwork supplier in India, we provide customised tunnel formwork and gantry solutions designed around the requirements of modern underground construction projects in India.