In situ soil mixing treatment of contaminated soils and 
groundwater: two case studies
C.W. Evans

The use of soil mixing is becoming more popular, both as a technique for the implementation of stabilization/solidification (S/S) soil treatment, and for the installation of low-permeability and reactive barriers. It was the main approach adopted for a major redevelopment project in the former industrial
dockland area of Dublin, where a low-permeability cut-off wall and soil treatment with simultaneous ground improvement works were carried out. It was also the technique of choice used to address contamination issues at a former industrial site in Devon, by the installation of permeable reactive
barriers (PRBs) and also the in situ S/S of soils as a temporary works solution. This paper outlines details of the two projects, highlighting the benefits of the technique, and the importance of prelimi
nary treatability studies to establish potential treatment performance. As soil mixing is undertaken on
projects of this nature, greater confidence will be gained in the use of the technique for remediation works, both to address geotechnical and contamination problems.

Key words: contaminated soils, field trials, permeable reactive barriers, soil mixing, stabilization/solidification, treatability studies

Land Contamination & Reclamation, 14 (1), 57-67

DOI 10.2462/09670513.705

© 2007 EPP Publications Ltd

To purchase the full article as a pdf (price £19.00), please click on 'buy now'. Payment can be made by PayPal or credit card for immediate download.

Article code 705