港珠澳大桥岛隧工程项目部尹海卿副总工做《港珠澳大桥岛隧工程创新技术》学术报告

  IAHR试验方法设备专业委员会主席Alessio Radice为尹海卿副总工颁发证书

Abstract: Hongkong-Zhuhai-Macao Bridge links Hong Kong, Zhuhai and Macau and is of total length above 50km with design life of 120 years and adopts design of combination of bridges, islands and one tunnel. This mega project due to its large scale is praised as one of the new seven major engineering miracles in the world. Hongkong-Zhuhai-Macau bridge is featured with its mega scale, joint efforts of the Three Regions under two different systems and the construction of the immersed tunnel and artificial islands distinguishes as the most outstanding characteristic , which consists of two man-made islands at open sea with each island of 100000 ㎡ areas and one 6.7km long immersed tube tunnel. The construction technique of immersed tunnel is a complex and comprehensive technique integrating workmanships of offshore marine engineering, marine works, underground engineering and tunnel engineering. The challenges to tunnel design and construction is extremely high. Nevertheless, the immersed tunnel of Hong Kong-Zhuhai-Macau Bridge Project has set four world records, namely the largest span, deepest embedment and greatest volume and weight of the immersed tunnel completed.

The challenges faced by the constructors include such extreme conditions as the severe marine conditions at open sea, unique and great depth of embedment, deep and thick soft soil layers, deep water and deep trench, rigid and high demand on environmental protection, tight and challenging works schedule, the exceptionally difficult and risky design and construction techniques involved. In the process of tunnel construction, guided by new and innovative concept and ideas more than one hundred testing and studies have been conducted and completed which have given birth to more than 500 technical patent rights . Substantial breakthroughs in designs and construction techniques have been achieved and have reached leading level of the world. Brand new concepts and ideas on environmental protection were practiced on site with emphasis on low energy consumption by use of effective construction technique and workmanship and low disturbance to surroundings, resulting in better harmony and friendliness between the construction and the surroundings. The commitment on protection of Chinese White Dolphins has been effectively achieved which has won the attention of the world.

This engineering project demonstrates the power and capability of China Highway Communication Construction and reflects the current status and future of China Highway Communication Construction. This article reviews the new technical achievements and evaluation generated in this great project and the technical achievements comprise technical breakthrough of rapid formation of man-made islands by deeply driven steel cylinder, accurate and fine dredging techniques, and deep water foundation techniques and immersed tunnel technique at open sea. The innovative techniques represented by rapid formation of islands by use of steel cylinder, semi-rigid immersed tunnel structure system and new typed closure joint of elements have completed and developed the constructional engineering systems of man-made islands at open sea and immersed tunnel and these new innovations are hoped to provide examples for similar forthcoming engineering works in the world.