Rectifying Subsidence Issues For Five Houses in Pascoe Vale

Project Overview:

In the realm of construction and property development, ensuring the structural integrity of buildings is paramount. This case study delves into the challenges faced by a chemical underpinning company tasked with rectifying subsidence issues in five houses, caused by poor drainage and construction practices. The project involved the utilization of injection works both internally and externally to lift and close the cracks, ultimately restoring stability to these properties.

Background

The five houses in question were constructed using waffle pod slab foundations, a common choice due to its cost-effectiveness and efficiency. However, during the assessment phase, it was evident that the subsidence issues were linked to two primary factors: poor drainage systems and subpar construction practices. The houses exhibited cracks on both interior and exterior walls, uneven flooring, and doors and windows that no longer operated smoothly.

Project Scope:

  1. Site Assessment: The initial phase involved a comprehensive assessment of each property. This included soil analysis, drainage system inspection, and a thorough examination of the foundation structure. It was revealed that the waffle pod slabs had settled unevenly due to inadequate soil compaction and drainage problems, leading to differential settlement and subsidence.

  2. Solution Design: To rectify the subsidence issues, a multi-faceted approach was designed. This involved the injection of specialized chemical grouts, both internally and externally, to raise and stabilize the affected areas. Additionally, improvements were made to the drainage systems to prevent future subsidence problems.

  3. Implementation: The injection works were executed systematically. Internal injections targeted the areas where cracks had formed, while external injections were performed along the perimeter of each house to lift and level the foundation. This process was carried out under the supervision of experienced engineers and technicians.

  4. Quality Control: Throughout the project, quality control measures were implemented to ensure the success of the remediation. Real-time monitoring of subsidence levels, crack closure, and the stabilization of the foundations were conducted to validate the effectiveness of the chemical underpinning solution.

Challenges:

Several challenges were encountered during the project:

  1. Coordination: Coordinating the work on multiple properties simultaneously required careful planning and resource allocation to meet the project timeline.

  2. Weather Conditions: Weather fluctuations posed a challenge, as extreme temperatures and rainfall could affect the curing of the injected grout.

  3. Client Communication: Ensuring clear and consistent communication with homeowners was crucial to managing expectations and addressing concerns.

Results:

Upon the completion of the project, the following results were achieved:

  1. Subsidence Remediation: The injection works successfully lifted and stabilized the waffle pod foundations, eliminating the subsidence issues.

  2. Crack Closure: Cracks in both interior and exterior walls were significantly reduced in size, enhancing the aesthetic appeal of the houses.

  3. Structural Stability: The properties regained their structural stability, ensuring the safety and comfort of the occupants.

  4. Improved Drainage: Upgraded drainage systems were implemented to mitigate future subsidence risks.

Conclusion:

This case study highlights the successful remediation of subsidence issues in five houses built on waffle pod foundations. Through a comprehensive approach that addressed both the structural and drainage problems, the chemical underpinning company was able to restore stability to the properties. Effective project management, careful coordination, and quality control measures played a pivotal role in achieving these positive outcomes. This case study serves as a testament to the importance of addressing the root causes of subsidence and employing innovative solutions to ensure the longevity of structures.
Rectify Group is an Australian ground engineering and asset remediation company.
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yue yang
yue yang
00:41 12 Sep 24
well job professional team and reasonable price
christa robnik
christa robnik
03:57 04 Sep 24
A professional, knowledgeable, excellently organised crew who completed a complicated job underpinning our restoration of a Federation home project - I would highly recommend Rectify for any engineering subsidence issues . 10/10 Thank you
Ian Y
Ian Y
02:47 02 Sep 24
Rectify will be your best choice if your property has any cracks need to be fixed. Josh came to quote our job on this windy day. He explained anything after checking the level. Really impressed with his knowledge and honesty. I will keep monitoring the cracks on my walls and garage floor. I will definitely get this guy back if they get worse. But for now it seems OK. Thanks Josh again!!
Alex Li
Alex Li
01:51 23 Aug 24
Booked inspection and assessment with Rectify. The inspector was very very professional and gave me very detailed advices. I'm satisfied with the service.
Darren Carney
Darren Carney
23:22 09 Aug 24
I engaged this company to fix a problem with a slightly leaning chimney.From first discussion on phone to site Visit quote and works done I found them to be very professional and knowledgeable.The guys who completed the work fixed the problem and were experienced in what they do explaining the process as they went along.Well done.Darren/ Gippsland
Ahmet Seker
Ahmet Seker
06:44 17 Jul 24
naz d
naz d
23:06 14 Jul 24
Booked my job with Sam from rectify . He was very professional , attentive and very accommodating. Knowing the urgency of my job as I was selling it , he was able to attend to job asap. Highly recommend Sam and rectify . Great work
Alan Prothero
Alan Prothero
10:20 02 Jul 24
The team turned up on time and carried out the work efficiently. Although my cracked render didn't close up totally, I'm happy in the knowledge that the ground is underpinned. When I get the cracks repaired, they are unlikely to crack again. Thanks again, guys.
Michael Kilpatrick
Michael Kilpatrick
01:38 27 Jun 24
Rectify were very professional to deal with and completed the job on time and on budget.All the employees I dealt with were also very friendly and easy to get on with.For the first time in years, my front door frame is rectangular and I can open and close my front windows.
Hala Sharkas
Hala Sharkas
23:50 14 Jun 24
I cannot recommend this company enough, they were absolutely incredible! From my first meeting with Phil I felt assured that he knew exactly what he was talking about and he made the stressful situation we were going through so much easier. We then had Sam come out and he was fantastic and again put us at ease so it was a no drainer that we would be going with them. The team that came and completed the job were again so amazing, professional and friendly. They left the house so clean and made sure to inform me of what was happening every step of the way. Thank you to the Rectify team for an amazing experience from start to finish.
Brentan Amadori
Brentan Amadori
23:47 14 Jun 24
Amazing team and service! I am so happy with how everything went for my house lift!Everyone was patient with my questions, knew exactly what they were doing, kept us in the loop, and the whole experience just filled me with confidence.I spent alot of time researching companies for this type of work andI highly, highly recommend them.There are alot of cowboys out there and these guys are the definition of professional, from start to finish.Thanks again!
Robert Walkley
Robert Walkley
06:53 19 Apr 24
Rectify was really prompt with their service, did a great job explaining the details of the problem, the work involved, and the process to correct it. The resin injection process is very precise and can be targetted with great accuracy. The work itself didn't take long at all and the turn around time was great; having the work done about a week after agreeing to the quote. Highly recommend.
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