Ground risk mitigation by better geotechnical design and construction management
In 2006, the three international sister societies on geotechnical engineering, rock mechanics and engineering geology, respectively the ISSMGE, the ISRM, and the IAEG, formed the Joint Technical Committee (JTC4) on improving professional practice. Within JTC4, a number of working groups are focussing on specific topics. Task group TG3 is concerned with geotechnical risk management. The four authors are all members of TG3. Through this paper, being produced as part of their work, they aim to raise further attention about the needs for and benefits of geotechnical risk management in our professional practices. Geotechnical “failures during construction are here defined in the broadest sense to include a range of negative situations from collapses to major contractual claims. These failures may be the result of shortcomings in an earlier phase, geotechnical design, or from the application of poor procedures and control during construction. These areas will be explored in the paper with the aim of recognizing the importance of the implementation of both improved geotechnical risk reduction practices through design and improved control over risk during construction on site. These two aspects of risk mitigation are easily mixed, but have very different features, as will be explained. Both strategies, geotechnical risk reduction and mitigation during design and geotechnical risk control during construction can be grouped under the same heading: geotechnical risk management. The importance of the geotechnical design process, the use of design codes, the evaluation of risk and the benefits of good risk management throughout the design and construction stages will be illustrated by means of case studies. A civil engineering approach will focus on risk reduction, while a mining engineering case study demonstrates how risk control may bring significant benefits, by optimizing value from mining while avoiding unexpected failures. For both cases a similar risk management approach is applicable. However, before any geo-professional can and should initiate a risk management process, there must be a degree of willingness to collect risks and to consider them independently, both individually and within the team. The level of understanding needed by the team is similar to that needed to operate the Observational Method. For this reason, the paper will first introduce the role of the people factor in risk management. The paper ends with some conclusions and recommendations, for improving ground risk mitigation by better geotechnical design and construction management.
T.J.P.Chapman M.Th.Van Staveren T.R.Stacey J.E.Hellings
Arup, United Kingdom GeoDelft and Delft University of Technology, The Netherlands University of the Witwatersrand, South Africa Dr Jan Hellings & Associates Ltd, United Kingdom
国际会议
上海
英文
2007-10-18（万方平台首次上网日期，不代表论文的发表时间）