PURPOSES: A methodology using a 3D-engineering technique was developed for implementation in paving Quality Control (QC) practice in bridge overlay paving.
METHODS: The as-built surface of a concrete-box-girder bridge tends to exhibit a certain level of undulation or roughness. This is usually caused by the inevitable limitation that camber prediction and construction cannot be perfectly matched. The undulation itself would not be a severe defect in a bridge structure, but it results in a challenge for achieving overlay pavement qualities such as pavement thickness and smoothness. One advantage of the 3D-engineering technique is that it allowed identification in advance, of conditions that will interfere with construction, thus preventing non-conformance qualities from being re-worked.
RESULTS : Utilizing this technique, overlay paving was virtually simulated in advance, and insufficient thickness areas and rough sections were visually identified. Paving quantities were automatically computed. Paving level alternatives were correspondingly established based on analysis of the quantitative and 3D visual outputs.
CONCLUSIONS: This study showed that this methodology could be successfully utilized for optimizing paving quantity and quality

ABSTRACT
 1. INTRODUCTION
 2. FREE CANTILEVER METHOD (FCM)BRIDGE
 3. CAMBER GEOMETRIC CONTROL IN FCMBRIDGE
  3.1. Design Camber Magnitude
  3.2. Camber Variation during Construction
 4. DEVELOPED METHODOLOGY
 5. OPTIMIZATION PROCESS
  5.1. Step 1: As-Built Condition Survey
  5.2. Step 2: BIM Modeling & As-Built SurfaceCondition Evaluation
  5.3. Step 3: Paving Level Alternative Selection &Paving Simulation
  5.4. Step 4: Quantitative Analysis and Optimization
 6. SUMMARY AND FINDINGS
 REFERENCES

• Bae Abraham(Member·Infra ENG Team, Samsung C&T) | 배석일 Corresponding Author
• Jeong Juyong(Infra ENG Team, Samsung C&T) | 정주용
• Park Byungyck(Infra ENG Team, Samsung C&T) | 박병익