Three-dimensional modelling of NATM tunnelling in decomposed granite soil

Three-dimensional rule based continuous soil modelling

Soil Fertility of Decomposed Granite Cut Slopes and Adjacent Vegetated Soils

In Thoreau's time, people were already planting trees to restore landscapes. Throughout this century, public and private organizations as well as countless landowners have worked to restore plant communities to sites that have been disturbed by natural disasters, and by human activities such as mining, road construction, clear cutting, and agriculture. Over the last 20 years, restoration ecolog...

Some Experiences of Modelling Tunnelling in Soft Ground Using Three-dimensional Finite Elements

A three-dimensional finite element model has been developed at Oxford University to study the effects of subsidence from soft ground tunnelling on adjacent surface structures. Simulation of excavation and the ground loss associated with tunnelling are incorporated in the model. Surface buildings are also included, as groups of interconnected two-dimensional façades composed of an elastic no ten...

Determination of three-dimensional structure in photon scanning tunnelling microscopy

We present an analytic solution to the problem of determining three-dimensional object structure, described by the spatial dependence of the susceptibility, from data accessible through photon scanning tunnelling microscopy (PSTM) experiments. An analysis is presented of the scattering of evanescent waves with detection of the scattered field by a probe in the near zone of the scatterer. The re...

The Stress-Strain-Strength Behaviour of a Completely Decomposed Granite Soil Using a New Advanced True Triaxial Testing System

Completely decomposed granite (CDG) soil is the most common type of soils found in more than 90% of the land area in Hong Kong. The measurement of the stress-strain-strength behaviour of the CDG soil is very important for deformation and stability analysis of slopes, retaining walls, excavations, deep and shallow foundations related to the CDG soil ground. As most of these geotechnical structur...