Preface
Keynote Speeches
Stiff sedimentary clays: geological origins and engineering properties
Engineering in stiff sedimentary clays
Session 1: Formation and Engineering Geology of Stiff Clays
A biostratigraphy for the London Clay in London
Geotechnical variation of London Clay across central London
Structure and mechanical response of sub-Apennine Blue Clays in relation to their geological and recent loading history
Informal discussion
Session 2: Laboratory and In Situ Techniques and their Interpretation
The influence of structure on the behaviour of London Clay
The stiffness of natural London Clay
Shear strength anisotropy of natural London Clay
Influence of structure on the time-dependent behaviour of a stiff sedimentary clay
In situ behaviour of a stiff layered clay subject to thermal loading: observations and interpretation
Technical Notes
Suction effects in deep Boom Clay block samples
Void ratio function for elastic shear moduli for Boom Clay
Manufacture of samples of overconsolidated clay by laboratory sedimentation
Informal discussion
Session 3: Characterisation of Formations and Material Models
Characteristics of the London Clay from the Terminal 5 site at Heathrow Airport
Peak strength of overconsolidated clays
A constitutive model for soft clayey rocks that includes weathering effects
An experimental investigation into the mechanical behaviour of a structured stiff clay
Twenty-five years’ geotechnical observation and testing in the Tertiary Boom Clay formation
Informal discussion
Session 4: Engineering in Stiff Clays
Predicting the stand-up time of temporary London Clay slopes at Terminal 5, Heathrow Airport
Modelling of long-term ground response to tunnelling under St James’s Park, London
Undrained behaviour of brecciated Upper Lias Clay at Empingham Dam
Pore water pressure and horizontal stress changes measured during construction of a contiguous bored pile multi-propped retaining wall in Lower Cretaceous clays
Informal discussion
Selected related articles from Ge´otechnique
Anisotropic stiffness parameters and their measurement in a stiff natural clay
Modelling of a 3D excavation in finite element analysis
Seasonal changes in pore water pressure in a grass-covered cut slope in London Clay
Installation effects of a bored pile wall in overconsolidated clay
Technical Note
Techniques for performing small-strain probes in the triaxial apparatus