CRL was engaged by BRC Piling to undertake crack injection works within a basement structure to arrest active water ingress. The injection methodology was developed to accommodate site-specific conditions and structural materials.

The process began with a detailed site walk through, attended by CRL’s site manager, leading hand, and injection technician. During this inspection, all active leaks and injection zones were identified and mapped. Proposed treatment methodologies were then reviewed and approved in consultation with the client representative.

Where excessive water flow was encountered, MC-Fix was applied as a pre-injection measure to temporarily control ingress. Following this, packers were installed based on the diagnosed water path and structural behaviour.

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Scope of Works:

• Crack and Joint Injection:
  Drillholes were angled at 45° to intersect the midpoint of cracks or joints, spaced 200–400 mm depending on void extent.
• Shotcrete Wall Injection:
  A 45° stitch-drilled pattern was used with spacing of 200–500 mm, based on wall thickness. Holes were cleaned prior to packer installation. MC-Fix was applied as needed to stabilise active waterflow. Due to the rapid-reacting resin, sealing between packers was typically unnecessary.

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Materials Used:

• ‍MC-InjektGL-95 TX: Selected for its excellent adhesion to HDPE membranes and durability under constant water exposure, ensuring compatibility with the installed Sika Plan system.‍
• MC-Injekt2111SF: Used for bulk filling of larger voids.

All observed water ingress was successfully eliminated. Post-injection inspections confirmed that previously saturated zones had dried completely, validating the injection method and material selection.

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