Operating for 35 Years I 150+ Years of Experience I 84,000+ Jobs Completed I Iso Accredited I In-house Engineers

Quick Enquiry Call Us

Search

If you cant find what you’re after please don’t hesitate to contact us.

Select Region

Please select the global region website you'd like to view.

Asia
Japan

Quick Enquiry

Submit your enquiry using our online form and include a brief message about the issues you are experiencing. A Mainmark expert will contact you within the next 24 to 48 hours, excluding weekends and public holidays.

Hidden
Consent
This field is for validation purposes and should be left unchanged.

Project Profile W10 L070

South Perth Seawall Rehabilitation

Sub-industry
Ports
Problems
Void Filling
Location
WA
Year
2010
Solutions
Void Filling
Technology
Uretek®

The problem

The sandstone block seawall on the Swan River beside the Kwinana Freeway had suffered considerable erosion from tidal forces over the decades since its construction in 1970. In seven days Mainmark restored the integrity of the structure, filling voids and joint lines by injecting Teretek® structural resin.

The solution

The objectives were to fill the many voids that had developed due to the erosion of fines and to reseal the joints between the blockwork of the structure to help stave off future erosion. The road pavement above and behind the wall was also to be re-supported by this void-filling.

The Result

The wall section to be treated was approximately 45m long, 3m high and 2m from front to back. Ground penetrating radar showed the structure to be heavily voided throughout. Rehabilitation had been attempted four years previously by other parties using injection of concrete under hydraulic pressure. It had achieved very limited success.

Preparation for the injection of Uretek resins began with the planning of two rows of holes, laid out in a zig-zag pattern. The holes were drilled down from the shoulder of the roadway and angled down as shown in the diagram above to facilitate complete filling of voids and joints by the strongly expanding Uretek structural resin.

The emergence of the expanding resins from the face of the seawall was one indication that voids and joints had been filled. Another indicator was a very small lift in the roadway shoulder and pavement. Complete void-filling was confirmed by thorough probing through all joints.

In just seven days, the seawall area was shown to have been completely rehabilitated as required.

Resources

Project Resources & Downloads

South Perth Seawall Rehabilitation
Teretek®
Next Project

Locomotive Wash-down Area Re-aligned

Mainmark

© 2025 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

Mainmark Ground Engineering Pty Ltd
ABN: 51 606 182 503

ISO 9001
ISO 14001
ISO 45001

Solutions

Ground Improvement

Subsidence Repair

Re-Levelling

Void Filling

Slab Lifting

Crack Wall Repair

Sinking Floors

Sinking Foundation Repair

Underpinning Repairs

Locations

Adelaide

Brisbane

Canberra

Hobart

Melbourne

New South Wales

Perth

Queensland

South Australia

Sydney

Tasmania

Townsville

Victoria

Western Australia

Sectors

Commercial

Residential

Infrastructure

Mining

Technologies

Teretek®

Terefil®

JOG

About Us

Our team

Careers

Media & Press

News

Awards

Contact

Locations
Mainmark Sydney

169 Sailors Bay Rd, Northbridge New South Wales 2063

 

Mainmark Melbourne

Unit 8, 33 Rosalie Street, Springvale Victoria 3171

Mainmark South Australia

19 Heath St, Lonsdale SA 5160

Mainmark Queensland

20 Computer Road, Yatala QLD 4207

Mainmark Perth

115 Excellence Dr, Wangara WA 6065

Privacy Policy

Terms and Conditions

Created by Codex

YouTube
Facebook
LinkedIn
Instagram