_{Our team carried out targeted waterproofing works for a lift shaft and adjoining retaining wall located within the basement level of a commercial building. Groundwater seepage through construction joints and cold joints was causing damp patches within the lift pit and around the retaining wall, posing a risk to structural durability and operational safety.}

Site Condition and Project Considerations

• The lift shaft extended several meters below ground level, fully embedded in the water table zone

• Active water seepage was observed at construction joints and base-to-wall intersections

• The retaining wall showed signs of minor cracking and capillary moisture transmission

• Limited working spacerequired precise execution of injection and coating works

‍

Solution Implementation

‍1. Crack and Joint Treatment

• All visible cracks were treated using flexible hydraulic injection resin, a low-viscosity, water-reactive material that expands upon contact with moisture to arrest active leaks.

• Cold joints and construction joints were injected with a hydraulic resin and crystalline slurry, which penetrated deep into the concrete matrix, forming an internal crystalline structure that blocks water pathways and enhances long-term durability.

‍

2. Surface Waterproofing

• The exposed vertical surface of the retaining wall was cleaned and coated with a cementitious crystalline waterproofing slurry that actively penetrated the pores of the concrete, creating an integral moisture barrier.

• The lift shaft walls and floor were treated with a polymer-modified cementitious waterproofing membrane, providing a breathable and durable surface capable of withstanding negative-side water pressure.

‍

Summary and Outcome‍

Systems Applied: Hydraulic Resin &Crystalline Injections; Flexible Hydraulic Injection Resin for Active Leak Sealing, and Cementitious Waterproofing Solutions (Negative-Side Coating).

The combined injection and surface coating system successfully stopped all water ingress. Post-application inspections confirmed that the lift shaft and retaining wall remained completely dry under hydrostatic pressure, ensuring operational safety and structural protection.