Recent asset management legislation has holistically incorporated a host of previously stand-alone principles such as "life cycle cost analysis" and "remaining useful life". Some of the issues responsible for the rapidly deteriorating condition of municipal road networks are the lack of capacity, skilled resources and funding to efficiently and effectively manage road networks. Other contributory factors are the lack of reliable condition data and proper Pavement Management Systems (PMS) to budget for and optimise expenditure of available maintenance funds. eThekwini Metropolitan Municipality has, for almost a decade now, used its PMS to achieve arguably one of the best paved metropolitan road networks in the country.
SANRAL's core business is to provide and maintain national roads, and to promote economic and social development. It also recognises that it has an obligation to support broader community development initiatives.
This article should be read together with the previous one on page 63. Whereas that article focuses on the engineering aspects of SANRAL's community-based approach, this article elaborates on dealing with community issues, such as sourcing local labour and addressing local residents' concerns.
The President of the South African Institution of Civil Engineering (SAICE), Dr Martin Van Veelen, has been elected as the new president of the Federation of African Engineering Organisations (FAEO). Dr Van Veelen was nominated and elected for this role by the executive committee of FAEO.
SAICE'S technical journal, Journal of the South African Institution of Civil Engineering, which appears twice a year (in April and October), is experiencing phenomenal growth and is becoming increasingly popular with readers and contributors alike. The publication of peer-reviewed technical papers on civil engineering remains one of the core functions of the Institution (being a learned society) and consistently adds to the body of civil engineering knowledge.
Professor Vanderschuren is to be complimented on her well-structured article "Facts and fiction about e-tolling" which appeared in the September 2012 edition of Civil Engineering. In it she has summarised current and past world practice in respect of toll roads, with particular emphasis on modern tolling systems in the urban context. As we all are aware, road pricing has been sporadically highlighted by academics, particularly transport economists,for some 50 or more years now, and it is only recently that some urban tolling systems have embraced this paradigm as part of the overall issue of an approach to public sector financing.
The practical applications of elastomeric bearing pads are reviewed, with particular reference to road and rail bridges. Design methods commonly used in South Africa are discussed. Aspects such as the properties of elastomers and the behaviour of pads are dealt with as well as testing and the interpretation of test results. Experience to date indicates that a well-designed and manufactured bearing pad should have a maintenance-free life of the order of 80 years.
The South African Railways has entered the field of lowspeed high-axle-load transportation. The disadvantage is an increase in the track structure maintenance cost or first cost or both. A design procedure based on classical theories, permissible stresses and some qualitative and quantitative performance correlations is explained.
The P K Ie Roux Dam is a major dam in the Orange River Project. Civil construction was completed at the end of 1977. Features of the structure and the refined design aspects are discussed and river diversion and the restraints that applied to it are descriptionbed in this paper. Construction costs and management will be dealt with in a subsequent paper to be published in The Civil Engineer in South Africa.
It has been experienced that cost forecasting for heavy industrial foundation structures is unreliable and often causes inconvenience. Based on elementary principles and records of executed projects a number.:of possible estimating methods and their applications were descriptionbed. On many occasions the recommendations preserited have been successfully used for practical examples.
Eight sets of standard intensity-duration-return period curves are presented representing different classes of intensities. Intensities may be read from these curves for durations of 5 to 60 minutes, and a point value for a duration of 120 minutes, for any place in South Africa. The class of intensity to be used for a particular place may be chosen using the suggested grouping of 62 gauging stations as a guideline and/or by using one of the existing methods by which intensities may be determined.