Sealing a Wet Well in Challenging Ground Conditions
In construction, ensuring the integrity of wet wells in challenging ground conditions is essential for long-term functionality and operational reliability. This project in Surrey showcased Total Specialist Maintenance’s (TSM) expertise in sealing a wet well constructed by a contractor, effectively addressing significant water ingress issues before the facility could be adopted by the local water company.
The Challenge
The construction company faced substantial challenges with water ingress in a wet well situated in running sands. The combination of unstable soil conditions and water infiltration created a critical situation that required immediate attention. Urgent sealing was necessary to prevent further water issues and ensure compliance with regulatory standards before the local water company could officially adopt the facility. Key requirements included:
- Mitigating Water Ingress: Preventing further water intrusion was essential to maintain the structural integrity of the wet well and ensure its long-term functionality.
- Ensuring Compliance with Industry Standards: All work performed needed to meet stringent safety and quality standards to satisfy both the construction company and the local water authority.
Why Manhole Sealing?
To effectively address the water ingress, TSM recognised the need for a comprehensive sealing solution. This approach offered several advantages:
- Prevention of Water-Related Damage: By effectively sealing the wet well, TSM aimed to enhance the longevity and durability of the structure, protecting it from the damaging effects of water intrusion.
- Compliance with Regulatory Standards: Implementing a robust sealing solution was essential for meeting the necessary regulatory requirements for water company adoption, facilitating a smooth transition for the facility into operational use.
The Solution: Comprehensive Sealing
TSM executed a thorough sealing process that included several critical steps:
- Confined Space Training: Understanding the potential hazards associated with working in confined spaces, TSM provided operatives trained to City and Guilds standards. This training ensured that all personnel were equipped with the knowledge and skills necessary for safe work practices.
- Resin Injection: TSM applied resin injection techniques to target areas of infiltration. This method effectively sealed leaks and provided a strong, durable barrier against future water ingress. The resin used was specifically formulated to expand and fill voids, creating a watertight seal.
- Concrete Repairs: The team conducted repairs to defective areas of the wet well, restoring its structural integrity. This involved assessing the condition of the existing concrete and applying appropriate repair mortars to address any weaknesses.
- New Concrete Floor: A new concrete floor was constructed within the wet well using R4-rated concrete repair mortar, known for its durability and resistance to water ingress. This provided a solid foundation and enhanced the overall strength of the structure.
- Waterproof Tanking: TSM applied waterproof tanking to the benching and manhole walls, ensuring complete protection against water ingress. This additional layer of defence was crucial for maintaining the integrity of the wet well in challenging ground conditions.
Project Management Excellence
TSM’s project management team effectively coordinated all aspects of the sealing process, ensuring that the work was completed on time and within budget. Their commitment to quality control and adherence to safety protocols played a vital role in the successful execution of this project. Regular progress meetings and updates kept all stakeholders informed, facilitating smooth communication throughout the project.
Environmental Considerations
Throughout the sealing process, TSM prioritised environmentally friendly materials and methods. The chosen solutions were designed to minimise environmental impact while providing superior protection for the wet well. This commitment to sustainability ensured that the project aligned with best practices in environmental management.
