Manhole Chambers / Utility Chambers
TVK’s Precast Manhole Chambers are cast monolithically on precision moulds, ensuring watertight performance and high durability. Available sizes range from 600×600 mm to 1500×1500 mm. Covers are supplied as per load requirements.
Purpose of Precast Manhole Chamber
- 🔧 Inspection, cleaning, and removal of obstructions in sewer/water lines.
- 🔄 Joining or changing direction/alignment of sewer or water pipes.
- 🌬️ Ventilation via perforated cover to allow escape of gases.
Conventional Construction Challenges
Construction of chambers below ground level in conventional method is a very tedious activity, as the size of the chambers are very narrow and provide very little working space. Moreover, sealing the construction joints against water leaks is highly challenging, resulting in poor durability and maintenance issues over time.
Material Specification
- Concrete: Grade 40 – 45
- Steel: Fe500
- Nominal Cover: 25 mm
Requirements
- Backfill soil density ≥ 18 kN/m³.
- Granular backfill adjacent to side walls.
- Layer-by-layer uniform compaction around chamber.
Design Criteria
- BS 5400 : Part 4 : 1990 | BD 31/01 | MS 1293 : Part 1 : 1992
- IRC 6 – 2000 Cl 214.1.1.3 | IS 456 : 2000 | IS 12592 : 2002
Construction Overview
Chambers are monolithically cast up to 2 m depth. For deeper chambers, joints are formed at 2 m intervals, sealed with polyurethane sealant. This system eliminates leakage risks, speeds up installation, and ensures long-term integrity.
Advantages over Conventional In-Situ Manholes
Robust Design
Engineered for superior durability and long-term structural strength.
High Quality Finish
Consistent production using high-quality materials and precise moulds.
Long Service Life
Designed for decades of service with minimal degradation over time.
Maintenance-Free
No recurring maintenance — saves operational time and cost.
Safe & Fast Installation
Safer, quicker, and more cost-efficient compared to conventional builds.
Watertight
Monolithic casting ensures perfect sealing and zero leakage.
Eco-Friendly
Less waste on site with a reduced carbon footprint during construction.
Minimal Site Work
Precast design reduces onsite activities and mess significantly.
Predefined Openings
Openings for service line connections are pre-provided in factory.
Versatile Connections
Supports all standard pipe materials, diameters, and orientations.
Retrofittable Design
Can be modified for future developments without replacement.
Cost & Time Savings
Reduces total project duration and overall construction expenses.
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