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Abstract: Tseung Kwan O – Lam Tin Tunnel project comprises 2.22 km dual two-lane road tunnels developed to improve connectivity of Central and Eastern Kowloon Area in Hong Kong. For most of the alignment length, the average excavation span of the main tunnels is about 16 m. In one location however, there is a bifurcation where one of the main tunnel drives branches off to the Eastern Harbour Crossing,...