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A case study of the ISO13567 CAD layering standard for automated quantity measurement in Hong Kong

机译：以ISO13567 CAD分层标准为例的香港自动测量案例

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摘要

Computer-Aided Design (CAD) is widely utilized in the Hong Kong construction industry. However, quantity surveyors and contractors are still extracting material quantities manually from paper drawings. This process is often criticized as mechanical, labour-intensive and time-consuming. On the other hand, it is the most reliable method as the existing automated methodologies cannot be effectively and efficiently applied under the manifold CAD drafting standards. To alleviate the problem, this research proposes an automated solution that adopts the ISO13567 CAD drafting standard. The system has been tested in an air cargo terminal project in Hong Kong. The results indicate that the proposed solution is on average 10 times faster than the manual approach. It achieves a measurement accuracy of up to 99% for a correctly structured CAD drawing. Nevertheless, there are barriers that undermine the results and hence the use of the system in practice. The outcomes of this research have been presented to the Construction Industry Review Committee of the Hong Kong Government. Following a consultation study commissioned by the Government, a local CAD drafting standard called the CAD Standard for Works Projects (CWSP) was launched in September 2002. As enforced by the corresponding contract provisions, project parties to public works contracts are now sticking to CSWP, and thus practical use can be made of the proposed system after the necessary modifications have been made.
机译：计算机辅助设计（CAD）在香港建筑业中得到了广泛的应用。但是，工料测量师和承包商仍在从纸质图纸中手动提取物料数量。该过程通常被批评为机械的，劳动密集的和费时的。另一方面，这是最可靠的方法，因为在多种CAD制图标准下无法有效地应用现有的自动化方法。为了缓解该问题，本研究提出了一种采用ISO13567 CAD制图标准的自动化解决方案。该系统已经在香港的一个航空货运站项目中进行了测试。结果表明，提出的解决方案平均比手动方法快10倍。对于正确构造的CAD工程图，它可以实现高达99％的测量精度。但是，仍然存在一些障碍，破坏了结果，因此在实践中无法使用该系统。研究结果已提交香港政府建造业检讨委员会。在政府委托进行的一项咨询研究之后，2002年9月启动了一项本地CAD起草标准，称为CAD项目（CWSP）。根据相应合同条款的强制执行，公共工程合同的项目方现在坚持CSWP，因此，在进行必要的修改之后，可以对所提出的系统进行实际使用。

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