橋梁一般(測定) (2)

[I-359] Estimate the cause of unusual expansion gap by annual changes in girder clearance

*Sunao Iwabuchi¹, Yasunori Miyamori², Tomohisa Takehara¹, Takehiko Saito³, Yoichi Hinata⁴, Takanori Kadota³ (1. Koken Engineering Co.,Ltd., 2. Hokkaido University, 3. KITAMI Institute of Technology, 4. Nihon Kasetsu Co.,Ltd.)

Keywords:unusual expansion gap, displacement measurement, Expansion Gap Observation System