拟建明月峡长江大桥桥区炸礁工程整治效果分析  

Analysis on the effect of reef engineering in the proposed Mingyuexia Yangtze River bridge area

作　　者：包明金 贺岚 郭琦 樊书刚 何艳军 BAO Ming-jin;HE Lan;GUO Qi;FAN Shu-gang;HE Yan-jun(Changjiang Chongqing Harbor and Waterway Engineering Investigation and Design Institute,Chongqing 401147,China)

机构地区：[1]长江重庆航运工程勘察设计院,重庆401147

出　　处：《水运工程》2018年第9期133-138,共6页Port & Waterway Engineering

摘　　要：明月峡长江大桥建成后,桥下左岸洪庙角礁石将影响该滩段航道尺度的进一步提高。为避免这一情况,针对其河势及滩情,考虑长江航运远期发展的需求,在原3. 7 m炸礁方案的基础上提出了加深炸除方案。采用平面二维数学模型对此方案进行论证研究,并用实测水面线和流速分布验证该模型,结果表明模型验证较好、可正确模拟该滩段实际水流运动。方案实施后,设计最低通航水位的断面平均流速及沿程流速变化均小于0. 01 ms;沿程比降没有明显变化,仅在炸礁区域上游水面略有下降,最大约0. 01 m;炸礁区流场改善明显,流向与航槽夹角显著减小,改善了船舶的航行条件。After the completion of the Mingyuexia Yangtze River bridge,the left bank of the Hongmiaojiao reef under the bridge will affect the further improvement of the channel scale of this section of beach.In order to avoid this situation,in view of its river situation and beach situation and considering the long-term development needs of shipping in the Yangtze River,a deep reef blasting plan is proposed based on the original 3.7 m reef blasting scheme.The scheme is demonstrated by using a two-dimensional plane mathematical model,which is validated by the measured surface line and velocity distribution.The results show that the model validation is good,and can correctly simulate the actual water flow movement of the beach.After the implementation of the scheme,the average flow velocity of the section of the designed lowest navigable water level and the change of flow velocity along the path are all less than 0.01 m s.The gradient along the distance has no obvious change,only in the upper reaches of the reef-blasting area,the water surface decreases slightly by a maximum of 0.01 m.The flow field in the reef blast area is improved obviously,the angle between the flow direction and the channel decreases obviously,and the navigation conditions of the ship are improved.

关 键 词：洪庙角礁石 数学模型 炸礁 通航水流 

分 类 号：U617[交通运输工程—船舶及航道工程]