EXECUTIVE SUMMARY

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

PROBLEM STATEMENT

The project faced a significant setback as unstable ground conditions prevented the initiationof vibro piling. A lack of suitable crushed material in the area necessitated a review oftraditional 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 moisturecontent of 46%.

THE SMR SOLUTION

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

RESULTS

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

BENEFITS

Ground Stabilization: Successful stabilization of unstableground conditions. 

CBR Value Achievement: Exceeded the required CBR value,enabling safe building work. 

Building Program Continuity: Facilitated the use of Vibro pilingunit, avoiding further project delays.

CONCLUSION

The application of SMR effectively addressed the instabilityissue, achieving the necessary CBR value and enabling theproject to progress without interruption.