Scan-to-BIM technique in building maintenance projects: practicing quantity take-off

IF 2.1 Q2 CONSTRUCTION & BUILDING TECHNOLOGY International Journal of Building Pathology and Adaptation Pub Date : 2022-09-22 DOI:10.1108/ijbpa-06-2022-0097
M. Sing, Sophie, Y.Y. Luk, Ken H.C. Chan, H. Liu, Richard Humphrey
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引用次数: 1

Abstract

PurposeIn Hong Kong, over 20,000 private residential buildings will be 50 plus years old by 2039. However, building maintenance has not been owners’ popular interest because of the high cost as well as the complexities in justifying whether the quantities and prices of the maintenance works are reasonable. This paper therefore aims to validate the practicality of adopting Scan-to-BIM: Terrestrial Laser Scan (TLS) and Building Information Modelling (BIM) to perform quantity take-offs (QTO) for estimating building maintenance costs.Design/methodology/approachA 64-year-old tenement building was selected to conduct a case study. In this instance, the building had undergone a Scan-to-BIM survey approach to generate QTO for the bills of quantities for external painting works. The Scan-to-BIM approach includes site visit, positioning of scanning equipment, assignment of circular scan routes, point cloud registration and identification of residual error. After that, time, cost and quality data were logged into contrast with QTO on as-built plans for external wall plastering works.FindingsThe “time”, “cost” and “quality” of the Scan-to BIM practice were then examined and compared with the prevailing practices of manual measurements on as-built drawings. As noted from the results, the initial cost of Scan-to BIM is high, owing to the cost of equipment, software and capable available operators. However, the authors identified that the time and cost can be significantly minimised by developing and implementing efficient practices such as preparing a detailed scan plan, equipping modeller with quantity surveying knowledge, using automated object recognition and 5D BIM software packages such as Vico Office and CostX.Practical implicationsThe upshot is that Scan-to-BIM could be one of the measures to advance the clarity in the QTO and estimated price of the maintenance projects.Originality/valueThe practicability of Scan-to-BIM has received limited attention on existing building maintenance project. The Scan-to-BIM approach was examined using a case building of a 64-year-old tenement building. The approach demonstrated in this research study is promised to advance the clarity in the QTO and estimated price of maintenance project.
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建筑维修项目中Scan-to-BIM技术:实践量起飞
目标到2039年,香港将有2万多幢私人住宅楼建成50年以上。然而,由于维修工程的成本高昂,以及在证明维修工程的数量和价格是否合理方面存在复杂性,建筑物维修一直不是业主的普遍兴趣。因此,本文旨在验证采用扫描到BIM:地面激光扫描(TLS)和建筑信息建模(BIM)来进行数量统计(QTO)以估计建筑维护成本的实用性。设计/方法/方法选择一栋有64年历史的唐楼进行案例研究。在这种情况下,该建筑采用了扫描到BIM的调查方法,为外部涂装工程的工程量清单生成QTO。扫描到BIM的方法包括现场访问、扫描设备的定位、圆形扫描路线的分配、点云登记和残余误差的识别。之后,将时间、成本和质量数据与外墙抹灰工程竣工计划中的QTO进行对比。发现扫描BIM实践的“时间”、“成本”和“质量”随后进行了检查,并与竣工图上手动测量的主流实践进行了比较。从结果中可以看出,由于设备、软件和有能力的操作员的成本,扫描BIM的初始成本很高。然而,作者发现,通过制定和实施有效的实践,如准备详细的扫描计划、为建模人员配备数量测量知识、,使用自动物体识别和5D BIM软件包,如Vico Office和CostX。实际意义。结果是,扫描BIM可能是提高QTO和维护项目估计价格清晰度的措施之一。独创性/价值扫描到BIM的实用性在现有建筑维护项目中受到的关注有限。扫描BIM方法是使用一栋有64年历史的唐楼的案例建筑进行检查的。本研究中展示的方法有望提高QTO和维护项目估计价格的清晰度。
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来源期刊
CiteScore
4.80
自引率
18.20%
发文量
76
期刊介绍: The International Journal of Building Pathology and Adaptation publishes findings on contemporary and original research towards sustaining, maintaining and managing existing buildings. The journal provides an interdisciplinary approach to the study of buildings, their performance and adaptation in order to develop appropriate technical and management solutions. This requires an holistic understanding of the complex interactions between the materials, components, occupants, design and environment, demanding the application and development of methodologies for diagnosis, prognosis and treatment in this multidisciplinary area. With rapid technological developments, a changing climate and more extreme weather, coupled with developing societal demands, the challenges to the professions responsible are complex and varied; solutions need to be rigorously researched and tested to navigate the dynamic context in which today''s buildings are to be sustained. Within this context, the scope and coverage of the journal incorporates the following indicative topics: • Behavioural and human responses • Building defects and prognosis • Building adaptation and retrofit • Building conservation and restoration • Building Information Modelling (BIM) • Building and planning regulations and legislation • Building technology • Conflict avoidance, management and disputes resolution • Digital information and communication technologies • Education and training • Environmental performance • Energy management • Health, safety and welfare issues • Healthy enclosures • Innovations and innovative technologies • Law and practice of dilapidation • Maintenance and refurbishment • Materials testing • Policy formulation and development • Project management • Resilience • Structural considerations • Surveying methodologies and techniques • Sustainability and climate change • Valuation and financial investment
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