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长江中游航道整治工程和长江通航能力建设调查

2017-05-02 16:35:10   

上图 在三峡五级船闸的智能调控室,工作人员正在指挥船舶有序排队通过船闸。

中图 荆江航道众多沙洲上采取了符合生态发展要求的护滩、加固护岸、护底等工程措施,以固滩稳槽。图为治理后的腊林洲高滩。

下图 大型货轮正在三峡大坝和葛洲坝之间的航道上稳稳前行。

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近日,总投资近40亿元、长江中游航道规模最大的建设项目——长江中游荆江河段航道整治工程正式通过竣工验收,航道水深由原来的3.2米提高到3.8米,这意味着3000吨级货船组成的万吨级船队可昼夜双向通航。至此,长江中游航道“肠梗阻”之困得到初步缓解,长江黄金水道的运输潜能进一步释放。

“服务长江经济带,黄金水道当先行。”荆江河段航道整治工程有效破解了长江中游航道“肠梗阻”之困,黄金水道功能日益凸显。随着荆江航道整治工程的竣工,工程的航运效益、社会效益和生态效益开始初步显现,为全面实施长江经济带发展战略奠定了良好基础。

科技创新 航道整治突破世界级难题

4月15日,记者来到位于长江中游的腊林洲高滩,习习江风拂面,载满货物的大型船舶稳稳前行,整治后的洲滩堤岸宛如一条生态长廊,曲折延绵,很难想象这里以前曾经暗滩遍布,危险重重。

万里长江,浅在荆江,也险在荆江。起于湖北枝城,止于洞庭湖出口处湖南城陵矶的荆江河段,全长280.5公里,九曲回肠,滩多水浅,最浅处维护水深仅有2.9米,历来是长江航道最险的航路,是钳制长江中游的“肠梗阻”。同时,荆江河段也是长江干线最难治理的一段,在这段航道里,分布着长江中游的“三大浅滩”,太平口心滩、腊林洲高滩、杨林矶边滩,这些洲滩此消彼长、分离组合,导致河床左右摆动,“三十年河东、三十年河西”就是它们的真实写照。

“在荆江河段实施航道整治工程,面临着防洪、生态与河势等多种世界级难题,就好比在‘核桃里雕罗汉’,要想做好,就一个字——难。”长江中游荆江航道整治工程建设指挥部常务副指挥长何传金介绍说,荆江航道“一弯变,弯弯变”,重点碍航滩险达17处,还有砂卵石河段和沙质河段,实施整治工程犹如在沙滩上起高楼,风险极大。此外,荆江河段历史上就有“四口分流”,这与长江干线其他河段截然不同,该段航道滩多水浅,演变剧烈,航道维护、航道治理更加困难。

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