Showing papers by "Mott MacDonald published in 2001"
TL;DR: In this article, the authors compared the costs of water production with seawater reverse osmosis (RO) and showed that water costs in the range of 0.7 to 0.9 US $/m3 are achievable with RO or large distillation plants, depending on the seawater source and cost of available energy.
187 citations
TL;DR: In this paper, a series of geotechnical centrifuge tests of this type of structure has been undertaken, and an accompanying series of plane strain finite element analyses are reported. But some aspects of the structure do not conform to a plane strain analysis (most notably the piles), and the methods used to incorporate this soil structure interaction are described.
59 citations
TL;DR: Overall performance was worse than that observed previously when UASB digesters were used to treat pot ale from a different source supplemented with trace elements, indicating that overall performance was limited by the rate of VFA conversion.
56 citations
TL;DR: In this paper, the effects of temperature, bromide ions, and applied potential fields on the reliability and accuracy of the silver/silver chloride electrodes were evaluated using a mathematical approach and the other two effects were examined experimentally.
51 citations
TL;DR: In this paper, a non-linear method of analysis is proposed, based on the concept of strain compatibility, but suitably modified to accommodate the behaviour of unbonded tendons in regions of incomplete grouting in the ducts.
29 citations
TL;DR: In this paper, the authors have reviewed the technological innovations and project implementation methods employed in the projects and described these projects and reviewed the technologies and techniques used in the implementation of these projects.
26 citations
TL;DR: In this article, the authors present the following environmental requirements and issues: (1) Site Identification/Site Selection -site identification is often based on engineering factors to minimize cost of infrastructure whereas site selection should be based on environmental and engineering factors, to ensure timely award of consents and licences; (2) Public Relations -public relations is an important issue in the stakeholder concept.
20 citations
TL;DR: In this article, a bored pile anchored wall with foundations socketed into a deep sandstone foundation stratum was designed to safeguard the highway and it was anticipated that deloading the slope would reduce the capacity for further movement.
10 citations
TL;DR: In the comprehensive EC-sponsored initiative, CBUF (combustion behaviour of upholstered furniture), three models were developed for furniture fire prediction as mentioned in this paper, one based on an area convolution technique with expressions of burning area over time determined for furniture types.
Abstract: In the comprehensive EC-sponsored initiative, CBUF (combustion behaviour of upholstered furniture), three models were developed for furniture fire prediction. The second of these models, CBUF model II, is based on an area convolution technique with expressions of burning area over time determined for furniture types. In this paper, the CBUF model II was applied to a set of exemplary New Zealand (NZ) upholstered furniture items. CBUF Model II was not found to predict with goodness the combustion behaviour of the NZ upholstered furniture.
9 citations
TL;DR: In this paper, the authors describe the findings of an assessment related to the nature and impact of slope instability for 20 km of chalk cuttings on the Metropolitan Line, and which forms an integral element of London Underground Ltd's Earth Structures Management Strategy.
Abstract: This paper describes the findings of an assessment related to the nature and impact of slope instability for 20 km of chalk cuttings on the Metropolitan Line, and which forms an integral element of London Underground Ltd’s Earth Structures Management Strategy. A desk study and detailed geomorphological field mapping were utilized in order to develop a comprehensive classification scheme for the chalk cuttings. The classification depends primarily on cut-slope geometry and proportion of superficial deposits found in the slope. Restrictive thresholds were identified between classes that controlled the type of instability hazards present. The relative risk to the track was assessed which enabled targeting of future remedial measures to the most appropriate locations and the development of a cost-effective maintenance strategy.
6 citations
TL;DR: In this paper, the authors outline the concept of replacing the conventional gas analysis train in fire calorimeters, with a mass spectrometer (MS), motivated by a desire to improve upon aspects of the conventional technique These are cumbersome equations, time delays, time lags and noisy results.
Abstract: This document outlines the concept of replacing the conventional gas analysis train in fire calorimeters, with a mass spectrometer (MS) This concept is motivated by a desire to improve upon aspects of the conventional technique These are cumbersome equations, time delays, time lags and 'noisy' results The theoretical advantages and disadvantages of using a MS are presented This document should form the basis of an experimental programme to value the worth of the concept
TL;DR: In this paper, a geomorphological survey at Yarm, County Cleveland, which aimed to delineate unstable areas and address the potential causes of ground movements within a residential area was presented.
Abstract: Purpose of survey An integrated geomorphological survey involving detailed geomorphological field mapping and associated desk studies is a powerful tool in identifying the locations and nature of slope instability within built-up areas. When supplemented with existing or specifically designed ground investigation, initial instability processes and mechanism models can be re-evaluated and refined. This paper provides an example of a geomorphological survey at Yarm, County Cleveland, which aimed to delineate unstable areas and address the potential causes of ground movements within a residential area. The site Valley Drive and Denevale are situated at the far eastern end of Yarm, on the south side of the River Tees, near its confluence with the River Leven. The natural valley side slopes are about 10–15° in this area and rise up towards a plateau surface at 30 m A.O.D., some 20–25 m above the Tees Valley. In order to facilitate development on the valley side slopes, extensive cut and fill operations have been carried out. Artificial slopes steepened up to 37° and vertical walls to 3 m high were also evident. The published 1:10 560 scale British Geological Survey map (1976) and the 1:50 000 scale British Geological Survey map (1987) indicate Triassic Sherwood Standstone formation (formerly ‘Bunter– Sandstone) as outcropping within the river channel. The valley side slopes have been developed in thick superficial deposits which comprise Upper and Lower Glacial Till units, separated by Glacial Sands and Gravels overlying Laminated Clay. These materials are believed to have been deposited during the
Patent•
03 Aug 2001TL;DR: In this paper, a prefabricated platform unit is used for constructing a railway station platform, where the steps of constructing foundations alongside the railway, constructing upstanding supporting members on the foundations, and mounting a superstructure including prefabilistic platform units on the supporting members are described.
Abstract: A prefabricated platform unit 1, for construction or refurbishment of a railway station platform, has a stepped upper surface 4b with a recessed planar forward portion 4a on which edge copers 23 are to be mounted. Refurbishment of an exiting platform may be performed by excavating a region 22 of the platform surface to the front edge, installing a prefabricated platform unit 1 in the excavated region, and installing edge copers 23. Construction of a new platform may include the steps of constructing foundations alongside the railway, constructing upstanding supporting members on the foundations, and mounting a superstructure including prefabricated platform units on the supporting members.
TL;DR: In this paper, the parameters of sewage that affect the production and resulting concentration of hydrogen sulphide in both liquid and gas phases have been monitored in a sewerage system and the data have been used to develop a model of the chemical and physical processes leading to sulphide production in sewers, so that the sources and causes of the problem can be identified.
Abstract: The parameters of sewage that affect the production and resulting concentration of hydrogen sulphide in both liquid and gas phases have been monitored in a sewerage system. The data have been used to develop a model of the chemical and physical processes leading to sulphide production in sewers, so that the sources and causes of the problem can be identified. This model has been adapted to predict the concentrations of hydrogen sulphide that can be expected in the sewage and sewer atmosphere, following the construction of a major interceptor tunnel.