Metro Station Box Lining

Case Study – Metro Station Box Lining (Compartmentalised System)

A major underground metro station box required a waterproofing solution capable of managing sustained groundwater pressure while allowing future maintainability. Given the scale and complexity of the structure, the design incorporated a fully compartmentalised waterproofing approach to localise risk and provide long-term remediation capability.

BSL VLDPE Tunnel Lining Membrane was installed between the primary shotcrete lining and the secondary in-situ concrete wall, forming a continuous waterproofing barrier. The membrane was heat welded to create secure, watertight seams and detailed carefully around penetrations, kicker joints, and construction interfaces.

To enhance long-term asset protection, the system was compartmentalised into defined zones using welded waterstops and separation strips. Each compartment was integrated with injection ports and hose link systems, strategically positioned along construction joints and critical interfaces. This design allows targeted resin injection should water ingress occur, enabling remediation within a specific zone without affecting the broader structure.

By combining a high-performance VLDPE lining membrane with active injection capability, the project achieved both primary waterproofing integrity and a secondary, serviceable risk-management solution, ensuring durability, maintainability, and operational reliability in a critical transport environment.

Features

• 100-year design life for long-term reliability
• High chemical resistance and suitable for
aggressive groundwater
• Excellent elongation for movement
accommodation
• Fully weldable (hot air welding, extrusion
welding)for system integrity
• Durable and puncture resistant
• Fire rated
• Australian Made
• Complies with extensive international test
standards including EN 527, EN 1928, EN
14151, EN 12691 and more (Ref: TDS Page 1–4 )

Enviro Thinners No.1

Features

• High-quality solvent blend designed for polyurethane and moisture-cured systems

• Improves workability and viscosity control during application

• Promotes smooth flow and film formation when required

• Effective cleaning solvent for tools and equipment

Typical Uses

• Thinning polyurethane coatings and membranes where permitted by specification

• Cleaning spray equipment, rollers, and brushes used with polyurethane systems

• Removing uncured material from tools and application equipment

• Assisting with surface preparation by removing grease or contaminants prior to coating

Enviro Thinners No.7

Features

• Formulated for use with epoxy-based coatings and resin systems

• Balanced solvent blend for controlled viscosity adjustment

• Effective equipment cleaning solvent for epoxy applications

• Assists in maintaining spray and roller application performance

Typical Uses

• Thinning epoxy coatings and primers where permitted by product specification

• Cleaning spray lines, pumps, rollers, and brushes used with epoxy products

• Removing uncured epoxy residues from tools and equipment

• Supporting maintenance of application equipment during installation works

Enviro Thinners No.8

Features

• Fast-acting solvent blend for aggressive cleaning applications

• Highly effective in dissolving uncured resins, coatings, and adhesives

• Suitable for heavy-duty equipment cleaning

• Evaporates quickly, leaving minimal residue

Typical Uses

• Cleaning spray pumps, hoses, and application equipment

• Removing uncured coatings, sealants, and adhesives from tools

• Surface preparation cleaning where strong solvent action is required

• Maintenance cleaning during membrane and coating installation

Typical Uses

Enviro Joint Band can be used for:

• Internal and external corners
• Wet areas
• Movement joints
• High temperature resistance
• Bridging between different building materials

Features

• Suitable for wet areas
• Easy to use
• Excellent elongation
• Chemical resistance
• Eliminates bond breaking sealants

Features

• Easy Installation
• Chemical Resistant
• Flexible
• Wide Temperature Range
• Non-Toxic
• Root Resistant
• Excellent Adhesion
• Compatible with most other Envirosystems products

Typical Uses

Enviro ElastoFlex is simple to install and can be used for a variety of applications including;

• Cut & Covered Tunnels
• Concrete Walls & Slabs
• Roofs
• Swimming Pools
• Façade Joints
• Carpark Joints
• Culverts
• Bridge Decks
• Planter Boxes
• Basements