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IN-SITU SOIL STABILISATION FOR THE CONSTRUCTION OF A PILING MAT 
WESTERGATE, MARCH - APRIL 2018
CLIENT: GRACELANDS, DAVID WILSON HOMES

Industry: Civils
For civils industries, we offer a permanent and temporary Soil Stabilisation solution, for projects where large areas of ground material needs treatment, whithout having to remove material from site.

Application: In-situ
With our in-situ application, stabilisation is carried out in one continuous motion, for sub soil that needs to remain onsite to be re-used and treated, when there is no room to stockpile material.

EXECUTIVE SUMMARY 

This case study presents a successful approach to addressing unstable ground conditions that hindered building work. By using SMR through our in-situ application method, the ground was effectively stabilised, surpassing the required CBR value and enabling the safe commencement of building activities.

PROBLEM STATEMENT

The project faced a significant setback as unstable ground conditions prevented the initiation of vibro piling. A lack of suitable crushed material in the area necessitated a review of traditional methods for creating a piling platform with a minimum CBR value of 30%. Approximately 10,000m3 of area required stabilization, with a site visit revealing a moisture content of 46%.

THE SMR SOLUTION

Upon soil analysis confirming high moisture content, a decision was made to modify and stabilize the ground using SMRs In-situ application technique. This involved a single 300mm pass with an SMR modifying Binder, followed by a pass of SMR Proprietary Binder to a 300mm depth. The Binder was rotavated into the ground before being compacted with a 13 ton single drum roller.  

RESULTS

After 48 hours of curing, the results indicated a minimum CBR value of 30%, with an average of 43% after 7 days of curing. Exceeding the CBR requirements allowed the safe deployment of a 54-ton Vibro piling unit, facilitating the continuation of the building program without further delay.

BENEFITS

After 48 hours of curing, the results indicated a minimum CBR value of 30%, with an average of 43% after 7 days of curing. Exceeding the CBR requirements allowed the safe deployment of a 54-ton Vibro piling unit, facilitating the continuation of the building program without further delay.

CONCLUSION

The application of SMR effectively addressed the instability issue, achieving the necessary CBR value and enabling the project to progress without interruption.

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