东江特大桥桥面排水研究和环保设计

Design of Environmental Protection and Research on Bridge Deck Drainage for Dongjiang Bridge

东江特大桥跨越为香港供水的Ⅱ类水源东江,环保批复中对水源地提出了较高的要求,工程环保设计中需要采取较为全面的全周期环保措施。通过研究和借鉴国内外同类工程,在建管体制、污水收集处理、营运车辆和通航船只的事故防范等多方面提出了解决方案。鉴于本桥排水长度770m,桥梁纵坡2%,传统的纵向排水管方案经济性和可维护性均较差,经研究后提出利用路侧缓冲区结合桥面纵向引水管排水方案。

Across the Dongjiang River which is the Class II water source of Hong Kong water supply, Dongjiang Bridge is imposed by high demand on environmental friendliness, and the full life cycle of environmental protection is designed for the project. Through research on and reference of similar projects at home and abroad, a series of solutions are proposed in the aspects of construction and management system, sewage collection and treatment, vehicle and vessel accident prevention. In view of the bridge drainage length being 770m and the gradient being 2%, the traditional longitudinal drainage system will have bad performance on cost-effectiveness and maintenance. After study a solution is proposed which is combining the longitudinal water pipe draining with side buffering areas on bridge deck.