![]() ![]() (C) 2014 American Society of Civil Engineers.Īll projects are subject to risks that have both a direct and indirect effect on the project cost and time. This analysis has proved helpful for contractors, consultants, and HDD professionals in predicting execution time and estimating cost of HDD projects during the preconstruction phase. An automated user-friendly productivity prediction tool (HDD-PP) is developed to predict HDD productivity based on the NF model. The model is also used to produce productivity curves (production rate versus influencing factors) for each soil type. The NF model is tested using actual project data, which showed robust results with average validity percentages of 94.7, 82.3, and 86.7% for clay, rock, and sandy soils, respectively. The merits of this approach involve decreasing uncertainties in results, addressing nonlinear relationships, and dealing well with imprecise and linguistic data. A neurofuzzy (NF) approach is employed to develop the HDD productivity prediction model operating in clay, rock, and sandy soils. Potential factors impacting productivity are identified and studied based upon the literature and HDD experts across North America and abroad. To consider the effect of these factors on productivity prediction, the research presented in this paper assists in developing a productivity model for HDD operations. Productivity prediction and cost estimation of horizontal directional drilling (HDD) as a trenchless technology technique involves a large number of objective and subjective factors, which should be carefully identified and studied. It’s will also able to educate the stake holders on how important to follow the stipulated technical requirements that contributed to the project success. With the establishment of a thorough and a standard local authority’ technical requirements it’s will able to educate the HDD contractors and assist them in carrying out their work properly, successfully and safely. This study shall able to produce a standard HDD technical requirement and its’ framework. ![]() The research design for this study contains the following consist of the research problem and research questions, sampling design, method of data collection, method of data analysis, validation/verification of the HDD standard technical requirements and its’ frameworks. A descriptive and exploratory research design will be used for the study. This research shall use mixed method in achieving the objectives. The aims of this study are to determine the present local authorities’ technical requirements in HDD works, to determine the factors of HDD good practices and to develop a standard HDD’s technical requirement. ![]() Since year 1992 up to 2016 there are more than 40 thousand-unit HDD machine were sold worldwide. HDD was developed in California in the 1970s and was introduced in Europe in 1986. It’s called HDD because its steering ability to avoid existing utilities or other obstacles either horizontally, vertically and even pulled back where she got its name. Horizontal Directional Drilling (HDD) is a trenchless technology provides an installation alternative that offers a lot of benefit compared to traditional open-cut method. ![]()
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