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// Case Studies • InfraClay4000: Geosynthetic Clay Liner

InfraClay4000 GCL: Jarramlee Nature Reserve

Main Image for InfraClay4000 GCL: Jarramlee Nature Reserve

The Project

The Jarramlee Nature Reserve Remediation Project marked a pivotal step in environmental restoration, focusing on the critical rehabilitation of the natural landscape impacted by subsidence and water intrusion issues. The project's scope encompassed several civil and landscaping works, crucial among them being the construction of a lined swale leading from the bioretention pond in the southern part of the site to Ginninderra Creek. This swale was pivotal in managing subsurface water intrusion, a key contributor to the area’s subsidence issues. Additionally, the project entailed strategic remediation of areas showing visible subsidence. This process involved the excavation and removal of underground structures, filling voids with appropriate materials, re-compacting disturbed areas, and restoring the topsoil layer. An important aspect of this phase was the replanting of flora initially removed during the onset of the remediation effort, thus ensuring the restoration of the site's natural ecosystem. Landscaping and rehabilitation of areas affected by the excavation works were conducted in alignment with a Construction Environmental Management Plan (CEMP). The plan detailed the landscaping of the newly constructed swale and the re-seeding of other impacted areas, aiming to bring back the reserve's original ecological balance.

Challenges

The challenges presented by the Jarramlee Nature Reserve Remediation Project were multifaceted, primarily concerning environmental sustainability and effective water management. The construction of the swale required a lining solution that could provide reliable waterproofing to prevent further subsurface water intrusion, crucial in mitigating subsidence. Moreover, the solution had to be environmentally friendly to align with the project's goal of ecological restoration. Additionally, the liner needed to exhibit flexibility and durability, as it would be installed in an area with variable terrain and would need to withstand natural soil movements and plant growth. The challenge was finding a product that could meet all these criteria while being cost-effective and easy to install.

// Our Solution

InfraClay 4000, a high-quality Geosynthetic Clay Liner (GCL), was chosen as the ideal solution for the Jarramlee Nature Reserve Remediation Project. This product is known for its exceptional sealing properties, provided by the natural swelling ability of sodium bentonite clay sandwiched between layers of geotextiles. This composition allows InfraClay 4000 to form a self-sealing, low permeability barrier that effectively controls water migration. The installation of InfraClay 4000 in the construction of the swale was a critical step in ensuring the success of the water management strategy. Its flexibility allowed for easy installation, conforming to the natural contours of the land and accommodating any movements or settlements. This feature was essential in maintaining the liner's integrity over time, particularly in an environment where ground movements are expected. Moreover, InfraClay 4000's environmentally friendly profile made it an apt choice for the nature reserve, supporting the project's ecological rehabilitation goals. Its natural components and ability to integrate with the surrounding environment without causing harm or disruption were key factors in its selection. Through the application of InfraClay 4000, the Jarramlee Nature Reserve Remediation Project not only addressed the immediate concerns of subsidence and water intrusion but also laid a foundation for long-term ecological restoration. The project stands as a testament to the effectiveness of InfraClay 4000 in providing sustainable, reliable, and environmentally conscious solutions for complex geotechnical challenges. Case Study: InfraClay 4000 Geosynthetic Clay Liner in Jarramlee Nature Reserve Remediation Project