从《内河通航标准》看某些特殊限制性航道宽度的确定

通过对国家标准《内河通航标准》(GB50139-2004)的分析和计算,找出了影响航道宽度的主要参数和变动范围。当船舶或船队的尺度确定后(主要是长和宽),航道宽度即取决于航迹带宽度,而航迹带宽度又取决于航行漂角的大小。根椐特殊限制性航道———中间渠道和渡槽的运行特点,推求出其宽度的计算方法和结果。此时仍可用GB中相同的计算公式,对于1~3级航道航行漂角取2°;4~5级航道取1°;6~7级航道取0.7°。安全距离对单线航道取两个0.17倍航迹带宽度;对双线航道取0.34倍两个船舶或船队的航迹带宽度。

Definition of the width of special restricted channel from the Navigation standard of inland waterway

From analysis and calculation to the Navigation standard of inland waterway(GB1350139-2004),the main parameters and changed range influencing the channel width is found.As the ship or fleet size is defined,the channel width is dependent on the track zone width,and track zone width is dependent on the drift angle of navigation.According to the characteristics of special restricted channel(namely,the intermediate channel and agueduct),the calculation method and results of standard width of channels are deduced.Meanwhile,for the 1～3 class navigation channel,drift angle of navigation can use 2°;for the 4～5 class,can use 1° and for the 6～7 class,can use 0.7° by the same formula in GB.For the One-way channel,safe distance can use two 0.17 times track zone width;for two-way channel,safe distance can use 0.34 times track zone of two ships or fleet.