Toppling failure in the slopes of hard rock masses is a mode movement that has only been described last few years. Much work appeared literature to date deals with development this models. This Paper describes three field examples which came from contrasting structural settings. Each involves different scale mass movement; first example comes much folded Upper Carboniferous North Devon, second less disturbed South Wales and third altered Pre-Cambrian Scottish Highlands. The indicate requires...

1. The Basis of Engineering Geology - 2. Geological Materials 3. Masses 4. Maps 5. Recovery Samples 6. Field Tests and Measurements 7. Organisation, Design Reporting Site Investigations 8. Ground Response to Natural Processes 9. Withdrawal Support by Surface Excavations 10. Underground 11. Static Loading the 12. Dynamic 13. Reaction Changes in Fluid Gas Pressures

Weak sandstones are here defined as having a saturated uniaxial compression strength of 0·5–20 MPa. The mineralogy, texture, density, porosity and moisture content these materials have been studied together with their permeability, deformability. Microscopic characters, in particular mineral composition, packing area grain contact size distribution, were successfully used to explain the strength, deformability permeability weak sandstones. A practical index parameter for assessing has...

The shear strength of iofilled rock joints has been studied for a long time but complete understanding the mechanisms and parameters controlling process never reached. This Paper reviews test results in literature, compares them with obtained by Authors. main infilled are discussed framework failure involved shearing such discontinuities is given. La résistance au cisaillement des rocheux remplis été étudiée depuis trés longtemps mais le mécanisme et les paramétres contrôlant processus n'ont...

Abstract This paper reviews commonly occurring difficulties associated with the description and classification of granite proposes revised schemes for this purpose. The can be applied to granitic material masses, scheme describing latter incorporating new criteria volumetric percentage weathering grades define zones. Examples are provided application these granites in Korea.

Abstract Three themes are developed in this paper. The first deals with those principles basic to the science of geology and thus use geotechnical engineering; namely, superposition uniformitarianism; their is illustrated reference commonly occurring situations. Then application these practice explained, together difficulties that follow if little thought given demands they make for proper use. Two common causes difficulty considered; using an inappropriate description working at scale....

The theory of groundwater flow quantifies the movement, storage and release groundwater, including mass soluble insoluble inorganic organic matter, heat, it carries, is thus wide ranging in its application to studies management general. This section considers those aspects most encountered engineering geology.

Keywords: fabric ; structure of soils laboratory equipment residal rock mechanics site investigation soil properties ... Show All

Gas emission from landfill is related to both site conditions and environmental changes, yet almost no data are being gathered in the field describe this linkage adequately. In paper results of a review selected sites UK Germany presented: they illustrate how even continuous recording proves insufficient for purpose explaining gas emissions site. Site stratigraphy must be known some detail if either or frequent used meaningfully, because largely governs pathways available migration. As shown...

Biostratigraphy enables specific layers of strata to be given a unique stratigraphic address that can used identify the horizons in which situ tests are conducted and from samples for testing collected. This is particularly valuable when working fine-grained deposits, where position not easily recognised by lithology alone, permits any data bank geotechnical values performance without fear confusing one layer with another. Construction London Clay Formation, its supporting research, has...

Abstract A combination of spectral and velocity analysis, using an ultrasonic pulse technique, has been performed on two lithologies building stone: limestone sandstone. Measurements compressional shear wave velocities have made the results obtained compared with data provided from analyses frequency spectra so these rocks. It appears that centre attenuation calculated provide useful quantitative measures rock quality which augments measurements alone, especially in saturated specimens. The...

Keywords: friction ; laboratory equipment rock mechanics shear strength tests torsion ... Show All

A ground model is now an accepted part of any engineering that requires a prediction to be made how the on and around site will respond changes caused by construction. However, until it has not been possible quantify predictions such responses can improved developing model. Thanks instrumentation provided glass fibres inserted into ground, stream factual evidence response change from measuring Brillouin spectra as they deform. Thus, both timely research ways in which assist quantitative...

Remolded and undisturbed samples of kaolinitic clay were compacted to maximum pressures ranging from 2,000 psi (140 kg/sq cm) 6,500 (455 observe changes in the fabric sample chemistry expelled pore fluid. Samples tested high-pressure equipment specially designed simulate aspects geologic burial. The concentration ions water changed as compaction progressed, major change being concurrent with fall pore-fluid pressure. Crystallization was present pores. development a preferred orientation...

Abstract Seismic refraction surveys were employed for shallow investigations (down to 20–30 m depth) and conducted across the top of vertical exposures where underlying geology could be directly inspected. The suitability seismic identifying intensity depth rock weathering fracturing at respective locations thus correctly assessed. Research completed on granites Jurassic Cretaceous age from Korea had previously indicated that these granitic materials divided with reasonable accuracy into...