A BIM-Based System for Estimating Impacts of Contract Change in Car Depot Engineering Projects

摘要

Statistics showed frequent contract changes in car depot engineering projects, which resulted in huge budget overrun and extended duration. Estimating the impact of contract changes, which usually takes a considerable amount of time, is the key step for contract change management. The adoption of building information modeling (BIM) can facilitate the estimation process. Firstly, using quantity take-off from BIM, engineers and contractors can calculate the changed parts in construction more quickly and efficiently. Secondly, BIM can help determine changes that have greatest impact on follow-up activities. This paper demonstrates the use of BIM in car depot engineering projects. An algorithm was developed to extract network diagram from BIM models. The impact of contract changes on follow-up activities was calculated using a rule-based engine. The proposed framework was tested on a case of car depot engineering project from Guangzhou Metro Group.