Vertical alignment in high-rise building is a very important aspect. The architects are nowadays interested in improvising untypical complicated morphology in building designs which increase the difficulty in surveying for vertical alignments. Although the GNSS survey techniques are widely applied in constructions, there is a lack of data sources to explicitly expose their applicability in high-rise buildings and the challenges to be considered. This study has been oriented to find out the best suitable GPS survey technique for the vertical alignment in high-rise buildings and the practical challenges to be considered.
The findings have been attained by analyzing the reliable data gained through experts' comments through structured questionnaire survey, case studies and experiments on different GPS survey techniques.
The findings express that the GPS techniques can be used for vertical alignments in high-rise buildings except for direct setting out for which only RTK GPS can be used. There are some practical challenges to be considered in such GPS applications.
The findings encourage the research community to further focus on the GNSS survey applications in the constructions of high-rise buildings.
The research expresses applicability of easier and less time-consumed modern GNSS survey techniques instead of traditional survey methods for expediting building constructions.
The knowledge on such modern rapid survey techniques with accuracy, efficiency and reliability highly affects the process of infrastructure development.
The research presents a useful new knowledge on applying GNSS survey techniques for precise survey requirements in the construction industry and exposes the gateways for further researches and development.
It is my obligation to acknowledge and be ever grateful to those who have contributed to complete the task successfully. First of all, I would like to express my heartfelt gratitude to my supervisor Prof Archt. Lalith De Silva who is the Dean of the Faculty of Architecture for his great inspirational support, advices and guidance throughout the research in his busy schedule.I take this opportunity to acknowledge and emphasize the gratefulness to Dr.Y.G.Sandanayake, Head, Department of Building Economics, Ch.QS. Indunil Seneviratne, the Program Director, Ch.QS. Dr.Nirodha Fernando, Research Coordinator and all other lecturers for facilitating and making necessary arrangement for the study. Further I would like to extend the thankfulness to all other academic and non academic staff members of the faculty for their direct and indirect supports for the successful journey of the study. My special appreciation goes to Prof Archt.Samitha Manawadu for his support and guidance to do the case study at The Lotus Tower. I would like to extent further the gratitude to Licensed Chief Surveyor Mr.C.S.Liyanage and Project Consultant Unit of the Lotus Tower, Mr. A.W.M.Irshan, Construction Manager and the Project Management Unit of ‘The Elements’ and the Project Management Unit of the ‘Clearpoint’ of MAGA Engineering (Pvt) Ltd for facilitating and making necessary arrangement for the case studies and experiments in their projects.My sincere gratitude goes to Mr.Chaminda Senavirathna, Manager (Surveying & GIS) and other staff members of SULECO (Pvt) Ltd for facilitating the case studies and experiments by field observations and processing with their complete set of GPS instruments, software and CORSnet positional correction broadcasting network.Further, I would like to extend the gratitude to Mr.S.D.P.J.Dampegama, Additional Surveyor General, Survey Department, Sri Lanka, Mr.Joel Van Cranenbroeck, Former Business Technology Manager at Leica Geosystems, and all other academic and industrial professionals who have shared their expertise and experience via interviews and questionnaire surveys to add more value to the study.
Mohamed Safith, A.W. and De Silva, L. (2021), "The techniques and challenges of GPS surveying for vertical alignments in high-rise buildings", International Journal of Building Pathology and Adaptation, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/IJBPA-12-2019-0110
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