Dry Mix Methods for Deep Soil Stabilization

Hakan Bredenberg, Stabilator AB, Stockholm, Sweden. Goran Hoolm, Swedish Geotechnical Institute, Linkoping, Sweden.Bengt B. Broms, Royal Institute of Technology, Stockholm, Sweden.

• Preface; Applications of Dry Mix Method for deep soil stabilization; Keynote lecture: Applications of Dry Mix Methods for deep soil stabilization; Dry Mix Methods: A brief overview of international practice; Dry jet mixing method for liquefaction remediation; A new application example of DJM technology in China; Dry mix soil-cement walls: An application for mitigation of earthquake ground deformations in soft or liquefiable soils; Soil stabilization for embedment of Botlek Railway tunnel in the Netherlands; A geotechnical and environmental investigation of a block-stabilised road section; Mass stabilization of peat in road and railway construction; Properties of binders and stabilized soils: Keynote lecture: Properties of binders and stabilized soils; Laboratory-scale dry soil mixing of a sand; Some experience of stabilising Irish organic soils; Peat soil samples stabilised in laboratory - Experiences from manufacturing and testing; Geotechnical characteristics of two Italian peats stabilized with binders; Stabilization of some Swedish organic soils with different types of binder; Development of binders for organic soils; Shear box apparatus for modelling chemical stabilised soil-Introductory tests; Design methods and behaviour of stabilized soils: Keynote lecture: Design of lime, lime/ cement and cement columns; Analysis of the consolidation behavior of cement- and lime/ cement mixed column Foundations; Homogenization method for numerical analysis of improved ground with cement-treated soil columns; Lime-cement stabilization of slopes - Experiences and a design approach; Progressive failure of lime, lime/ cement and cement columns; Combined mass- and column stabilization in Kivikko test embankment- Designing by traditional and FE-methods; Mechanical behaviour and shear resistance of lime/ cement columns; Deep excavations with soil stabilised by lime/ cement columns - A parameter study using; finite element method; Three dimensional consolidation settlement of stabilized soil using lime/ cement columns; Numerical analysis of load distribution between lime/ cement columns and surrounding soil using finite element method; Alternative ways of modelling embankments on deep-stabilised soil; Case records, prediction and performance: Keynote lecture: Prediction and performance - Case records; The performance of stabilized soil columns in two Dutch testsites; Vertical bearing capacity of column type DMM ground with low improvement ratio; Observation of pore pressure and soil movements during lime column installation; Deep stabilization of sandfill in organic subsoil; Hertsby case: A column stabilised and geotextile reinforced road embankment on soft subsoil; Properties of mass- and cell stabilization: Two case studies in Sweden; Large ground deformations during cement lime column installation on road E4 in northern Sweden; Quality control of dry mix methods : Keynote lecture: Quality control for dry mix methods; Development of in-situ control methods for lime/ cement columns; Field methods for quality control at the dry jet mixing method; Column penetration tests and extraction of lime/ cement columns; A new method for laboratory preparation of stabilised clay; Equipment for dry mix methods for deep soil stabilization: Keynote lecture: Equipment for deep soil mixing with the dry jet mix method; Mixing efficiency of dry jet mixing methods applied to peaty soft ground; The mixing process at the dry jet mixing method; EuroSoilStab - Kivikko test embankment- Construction and research; Prestressed lime cement columns.