Uplift performance of shallow foundations with cement-stabilised backfill (2008)
Rattley, M.J., Lehane, B.M., Consoli, N., Richards, D. J.
This paper describes the results of a series of centrifuge model tests undertaken to investigate the effects of modifying a loose granular backfill using cement on the uplift performance of shallow...
Uplift performance of transmission tower foundations embedded in clay (2008)
Rattley, M.J., Richards, D.J., Lehane, B.M.
The contribution to the uplift stiffness and capacity provided by the clay beneath the base of shallow footings typical in configuration to those employed to support high voltage electricity...
Assessing MSW degradation by BMP and fibre analysis (2007)
Zheng, B., Richards, D.J., Smallman, D.J., Beaven, R.P.
Samples of fresh and partly composted municipal solid waste (MSW) were placed in 1 l reactors under conditions designed to promote rapid anaerobic degradation of the available organic fraction. The...
Landfill Science Research Needs: After the EU Landfill Directive (2007)
Powrie, W., Beaven, R.P., Watson, G.V.R, Richards, D.J., Barker, J.A., White, J.K., ...
On the pullout of footings backfilled with cemted sand (2007)
L'Amante, D., Helinski, M., Richards, D.J., Lehane B, B.M., Consoli, N.
The kinematics of failure and the uplift response of shallow footings embedded in loose sand, as well as on layers of weakly to moderately cemented loose sands, when subjected to vertical pullout...
Performance of push-in pressure cells in overconsolidated clay (2007)
Richards, D.J., Clark, J., Powrie, W., Heymann, G.
Low profile push-in pressure cells (spade cells) are commonly used to measure total horizontal stresses in overconsolidated clays. It is known that spade cells over-read the in situ stress in such...
Monitoring the dynamic displacements of railway track (2007)
Bowness, D., Lock, A.C., Powrie, W., Priest, J.A., Richards, D.J.
This paper reports the development and testing of two independent, innovative techniques for measuring rail displacements. One system combines remote video monitoring with particle image velocimetry,...
Ivanova, L., Richards, D. J., Beaven, R. P.
This Technical note invites International Research Groups to model and predict the performance of a well constrained laboratory experiment on the settlement and biodegradation of MSW waste. Data on...
Long term data from the Challenge experiment and a review of responses to the challenge (2007)
Beaven, R.P., Ivanova, L., Richards, D.J.
This paper reviews the responses from various International Research Groups to a Challenge to model and predict the performance of a well constrained laboratory experiment on the settlement and...
Richards, D.J., Powrie, W., Roscoe, H., Clark, J.
The design and construction of a contiguous bored pile propped retained cut on the approaches to Ashford International Station raised some challenging design issues. Design problems associated with...
Monitoring the dynamic displacements of railway track (2007)
Bowness, D, Lock, A. C., Powrie, W., Priest, J. A., Richards, D. J.
This paper reports the initial development and testing of two independent and innovative techniques for measuring rail displacements. One system combines remote video monitoring with particle image...
Installation effects of a bored pile wall in overconsolidated clay (2006)
Richards, D.J., Clark, J., Powrie, W.
In situ embedded retaining walls are used to form basements and cuttings in urban areas throughout the world, particularly where space is restricted. It is generally accepted that the process of...
Numerical determination of soil deformations around a penetrating object in 2D and 3D models (2006)
Farhangi, S., Richards, D.J., Clayton, C.R.I.
Various numerical methods have been employed to determine soil deformations around penetrating objects. However, due to the extensive computational resource requirements for 3D analysis, soil...
Innovative remote video monitoring of railway track displacements (2005)
Bowness, D., Lock, A.C., Richards, D.J., Powrie, W.
This paper reports the initial development and testing of an innovative technique for measuring rail displacements that combines remote video monitoring with particle image velocimetry (PIV). A...
An experimental study and numerical study of rate effects for plate anchors in clay (2005)
Richards, D.J., Rattley, M.J., Lehane, B.M., Gaudin, C.
Existing design charts for evaluation of the uplift capacity of plate anchors are difficult to apply in practice as it is often unclear if the applied loading will lead to an undrained response and,...
A review of the interpretation techniques for push-in pressure cell measurements (2005)
Farhangi, S., Richards, D.J., Clayton, C.R.I.
Push-in pressure cells are commonly used in the UK to measure in-situ stress. In common with all direct measurement techniques, the stress state of the soil is altered as the cell is advanced into...
Geotechnical analysis of a retaining wall in weak rock (2004)
Richards, D.J., Clayton, C.R.I., Powrie, W., Hayward, T.
The determination of realistic values of stiffness and in-situ horizontal stress is challenging in softer materials, but in weak rocks where discontinuities are typically present it is particularly...
Electronic data transfer systems for field monitoring (2003)
Richards, D.J., Chandler, R.J., Lock, A.C.
It is now recognised that modifying design procedures during the active construction phase of a project in response to the measured performance of key structural elements or ground movements can...
Caccamise,R. J., Fitzgerald,J. S., Mount,M. H., Richards,D. J.
Since the 1960's, the United States semiconductors industry moved labor intensive operations off-shore to take advantage of the lower cost labor. Although design and fabrication is primarily done in...
Measurement of Neutrons from High Energy Electron Linear Accelerators (1988)
Sherwin, A.G., Pearson, A.J., Richards, D.J., O'Hagan, J.B.
Electron linear accelerators (linacs) above 10 MeV are capable of generating significant neutron fluxes, particularly when operating in the X ray mode. This paper describes a prototype passive,...
Reader Annealing of LiF Chips (1987)
Driscoll, C.M.H., Richards, D.J.
An experimental investigation is described into the effects of repeated measurement and annealing in a thermoluminescence reader on the sensitivity and background of LiF:Mg,Ti (TLD-100) chips. It is...
European Intercomparison of Environmental Thermoluminescence Dosemeters (1986)
McKinlay, A.F., Driscoll, C.M.H., Richards, D.J.
The National Radiological Protection Board has a continuing interest in the development of thermoluminescence measurement techniques and has been using thermoluminescence dosemeters for the...
Responses of Thermoluminescent Materials to Beta Radiation and Low Energy Photons (1986)
Francis, T.M., O'Hagan, J.B., Richards, D.J., Driscoll, C.M.H.
The responses in terms of the individual dose equivalent, superficial, Hs(d), of a number of commercially available thermoluminescent materials to beta radiation were investigated and compared with...
Driscoll, C.M.H., McWhan, A., Richards, D.J.
The thermoluminescence properties of a new preparation of lithium fluoride (LiF) in chip form from Vinten Instruments Ltd have been compared in a preliminary study with those of the standard Harshaw...
The Response of Thermoluminescent Materials to Beta Radiation (1984)
Driscoll, C.M.H., Francis, T.M., Richards, D.J.
A preliminary study has been undertaken to examine the responses of a range of commercially-available thermoluminescent materials in non-powder form to beta radiation with maximum energies from 0.22...
Environmental Radiation Measurements Using Lithium Fluoride Thermoluminescence Dosemeters (1983)
Driscoll, C.M.H., Green, B.M.R., McKinlay, A.F., Richards, D.J.
The National Radiological Protection Board is at present involved in a large scale environmental survey of radiation levels in homes throughout the United Kingdom. Passive radon and gamma ray...
The Thermoluminescence Properties of Lithium Borate Dosemeters (1983)
Driscoll, C.M.H., Fisher, E.S., Furetta, C., Padovani, R., Richards, D.J., Wall, B.F.
The thermoluminescence properties of a number of commercially available preparations of lithium borate have been investigated. The objective of the study was to find a high sensitivity tissue...
The Alpha-Beta Heuristic (1961)
The Alpha-Beta heuristic is a method for pruning unneeded branches from the move tree of a game. The algorithm makes use of information gained about part of the tree to reject those branches which...
The Alpha-Beta Heuristic (1961)
The Alpha-Beta heuristic is a method for pruning unneeded branches from the move tree of a game. The algorithm makes use of information gained about part of the tree to reject those branches which...
Results of Buck screw fusion in grade I spondylolisthesis.
Bonnici, A V, Koka, S R, Richards, D J
The results of posterolateral screw fixation using the Buck technique performed on 24 patients with painful isthmic spondylolysis and up to grade I spondylolisthesis in the lumbar spine are reported....
Results of Buck screw fusion in grade I spondylolisthesis.
Bonnici, A V, Koka, S R, Richards, D J
The results of posterolateral screw fixation using the Buck technique performed on 24 patients with painful isthmic spondylolysis and up to grade I spondylolisthesis in the lumbar spine are reported....
Clinical and Laboratory Findings in a Trial of Norgestrel, a Low-dose Progestogen-only Contraceptive
Eckstein, P., Whitby, Margaret, Fotherby, K., Butler, Christine, Mukherjee, T. K., Burnett, J. B. C., ...
Norgestrel, a progestogen-only oral contraceptive, was given continually at a dose of 75 μg/day to 144 women of proved fertility. It was an efficient contraceptive with a failure rate of 2·1%...
Contraceptive Action of Continuous Low Doses of Norgestrel
Foss, G. L., Svendsen, E. K., Fotherby, K., Richards, D. J.
Norgestrel in a dose of 50 μg. was administered daily to 188 women during 2,250 menstrual cycles. Only two pregnancies occurred because of failure of the method, giving a failure rate of 1.1...