A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance of Dry Deep Soil Mixed Columns Supporting a Box Culvert – Lessons Learnt
Soft ground improvement using dry deep soil mixing (DSM) has the advantage of achieving relatively large strength increase within a short period of time. While there are proven track records of the excellent performance of the DSM columns, this paper presents a case study from the Ballina Bypass project in Australia where the measured column strength was relatively low and highly variable. Further, some of the installed DSM columns had a smaller diameter than the specified dimension. The box culvert and the embankment constructed over the nonconforming DSM columns had exhibited excessive settlement resulting in the structural integrity of the box culvert being compromised. Back-analysis of the embankment settlement was undertaken in order to understand the possible causes of the poor performance. The back-analysis results indicated that the yielding DSM columns provided insufficient improvement to the soft ground suggesting the predicted post-construction settlement would be similar to that of the untreated ground.
Performance of Dry Deep Soil Mixed Columns Supporting a Box Culvert – Lessons Learnt
Soft ground improvement using dry deep soil mixing (DSM) has the advantage of achieving relatively large strength increase within a short period of time. While there are proven track records of the excellent performance of the DSM columns, this paper presents a case study from the Ballina Bypass project in Australia where the measured column strength was relatively low and highly variable. Further, some of the installed DSM columns had a smaller diameter than the specified dimension. The box culvert and the embankment constructed over the nonconforming DSM columns had exhibited excessive settlement resulting in the structural integrity of the box culvert being compromised. Back-analysis of the embankment settlement was undertaken in order to understand the possible causes of the poor performance. The back-analysis results indicated that the yielding DSM columns provided insufficient improvement to the soft ground suggesting the predicted post-construction settlement would be similar to that of the untreated ground.
Performance of Dry Deep Soil Mixed Columns Supporting a Box Culvert – Lessons Learnt
Lecture Notes in Civil Engineering
Duc Long, Phung (editor) / Dung, Nguyen Tien (editor) / Chan, Kim (author) / Poon, Bosco (author) / Peiris, Ashok (author)
2019-11-29
8 pages
Article/Chapter (Book)
Electronic Resource
English
| British Library Online Contents | 2015
Deep Wet Soil Mixing Columns Ground Treatment Technique-Lesson Learnt from Project
| Springer Verlag | 2023