Operating for 36 Years I 150+ Years of Experience I 87,000+ Jobs Completed I Iso Accredited I In-house Engineers

Get a FREE Quote 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

Get a FREE Quote

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 Q13N060

Large Swimming Pool Re-levelled

Sub-industry
Public Buildings
Problems
Out-of-level Concrete
Location
ACT
Year
2011
Solutions
Slab Lifting
Technology
Uretek®

The problem

The 25m long public swimming pool at Monto, two hours west of Bundaberg, Queensland had sunk into the ground by up to 200mm toward the deep end.

The water would no longer drain to the shallow end, so the pool reticulation system would not work and the pool water could not be filtered properly.

The pool had been built in sections of precast concrete. Using a carefully sequenced program of expanding resin injections into the foundation ground under the pool the team brought the complex pool structure right back to level without mishap.

The solution

The objective was to get the pool as close to level as possible while avoiding over- lifting at any stage and disturbing the joints between sections of the pool structure.

The Result

The Regional Council had 3 options: 1. Re-do the plumbing and replace the filter system (very costly) but the pool would still be out of level, 2. Build a new aquatic centre (for millions of dollars), or 3. Re-level the pool with Uretek polymeric injections.

We were commissioned to lift the pool back to level. The pool had been built in precast concrete sections. The walls were precast with flat bases and concrete infill precast sections formed the floor of the pool.

The floor joints were set down with mastic filler and vertical joints were mastic filled. The fact that the sections were pre-cast dictated a need for extremely precise and careful lifting. Over-lifting any one section could break the joint. Also, due to its large precast base, the wall could easily rotate inwards or outwards.

Additionally, as the floor slab was sitting on a step joint, the internal slab could not be lifted as this could have caused this slab to lift at the joint. This meant a slow process of lifting each precast wall section a small amount at a time to slowly bring the pool back to an acceptable level.

Then the correction of levels was proved by pouring water in the gutter. The water in the gutter flowed to the shallow end again. Then the voids under the internal pool slab were filled very slowly with great care.

The result was extremely successful and the Regional Council saved a great deal of money compared with the alternatives. The chief council engineer congratulated the team on this excellent and problem-free result.

Resources

Project Resources & Downloads

Large Swimming Pool Re-levelled
Next Project

Retaining Walls Stabilisation

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 NSW 2063

 

Mainmark Melbourne

Unit 8, 33 Rosalie Street, Springvale VIC 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