采用不接岸丁坝治理过渡段浅滩

Regulation of crossing shoal by spur dike without root section

在进行边滩较宽阔且滩面高程较高的过渡段浅滩整治时,在满足丁坝束水导沙功能的情况下,为减小坝体长度可将丁坝的坝根段去除,形成不接岸丁坝。湘江铜官滩的航道整治试验研究表明,采取不接岸丁坝方案可取得较好的整治效果,但整治时应注意近岸缺口段河床及河岸的稳定性。

For regulating the crossing shoal of which the side bar is broad and surface elevation is high, under the prerequisite of satisfying the functions of floe contraction and sediment diversion, we may reduce the dike length by eliminating the dike＇s root section to form a spur dike without root section. Studies on waterway regulation of Tongguan shoal in Xiangjiang river reveal that the scheme of adopting the spur dike without root section can achieve satisfatory regulation effect, but we shall pay attention to the stability of the near shore gap section and bank.