Geotechnical Investigations and Structural Design of Piling Retaining Wall and Dincel Wall System

20 June 2025

LOCAL: NORTHERN BEACHES - CHURCH POINT NSW 2105

DATE: JAN TO JUN 2025

A white truck is parked on the side of the road next to a black fence.
A large pile of dirt is sitting on top of a hill surrounded by trees.

Project Title

Geotechnical Investigations and Structural Design of Piling Retaining Wall and Dincel Wall System

Project Description:
 This project comprised detailed geotechnical investigations and the subsequent structural design of a piling retaining wall in combination with a Dincel wall system, tailored to support the site's earth retention and structural requirements.


The geotechnical investigation involved site-specific subsurface exploration, including borehole drilling, soil sampling, and laboratory testing, to determine the ground profile, bearing capacity, and lateral earth pressures. The collected data informed the engineering design and ensured the structural systems were optimized for safety, stability, and durability.


Based on the geotechnical findings, a bored piling retaining wall was designed to retain significant soil loads and manage site level variations. The piles were engineered to appropriate depths and diameters in accordance with Australian Standard AS 2159, ensuring compliance with structural and geotechnical performance criteria.


The Dincel wall system, a modular and permanent polymer formwork solution, was integrated into the design to act as both a structural and architectural wall. The system provided benefits in terms of speed of construction, fire rating, and waterproofing, making it an efficient solution for the project.


Scope of Services Included:

  • Site geotechnical investigation and reporting
  • Soil classification, stability analysis, and bearing capacity assessment
  • Structural design and detailing of the piling retaining wall
  • Engineering design of the Dincel wall system in accordance with AS 3600
  • Integration of geotechnical and structural design elements
  • Coordination with civil and architectural project components



This project reflects Soilsrock Engineering’s capability to deliver integrated geotechnical and structural solutions, ensuring high-quality outcomes for complex ground and retaining wall conditions.