BIM+三维激光扫描技术在既有建筑改造项目的应用研究

Research on Application of BIM+3D Laser Scanning Technology in Existing Building Renovation Projects

既有建筑改造是当前建筑业重要发展方向之一,改造类项目通常存在现场与原设计图纸不符或缺乏设计图纸等问题。以湖北省中西医结合医院维修改造项目为例,利用BIM+三维激光扫描技术助力项目维修改造,采用三维激光扫描仪进行现场扫描,处理点云数据创建既有建筑的项目点云,将项目点云与BIM模型进行对比,快速呈现设计图纸与现场不符之处,根据点云模型校正土建BIM模型,再优化BIM机电深化设计,指导现场机电工程施工。经验证,三维激光扫描仪精度满足项目要求,BIM+三维激光扫描技术可高效且准确地获取既有建筑的实际尺寸,也可以得出和设计图纸的偏差,为改造设计提供了可靠的数据支撑,提高了设计的效率和质量,减少了施工返工,保证了工程质量和进度。

The existing building renovation was one of the important development directions of the current construction industry,renovation projects usually had problems such as site and original design drawings did not match or lack of design drawings.Took the maintenance and transformation project of Hubei Province Integrated Traditional Chinese and Western Medicine Hospital for example,by using BIM+3D laser scanning technology to help project maintenance and transformation,we used 3D laser scanner for on-site scanning,processed point cloud data to create a project point cloud of existing buildings,and compared the project point cloud with BIM model,so quickly presented the inconsistencies between the design drawings and the site.According to the point cloud model,the civil BIM model was corrected,and then the BIM mechanical and electrical detailed design was optimized to guide the on-site mechanical and electrical engineering construction.It was verified that the accuracy of the 3D laser scanner met the project requirements,and BIM+3D laser scanning technology could efficiently and accurately obtain the actual size of the existing building and could also obtain the deviation from the design drawing,which provided reliable data support for the transformation design,improved the efficiency and quality of the design,reduced the construction rework,and ensured the quality and progress of the project.