格宾笼导流墙在文殊沙河水毁修复中的应用

Application of Gabion Cage Diversion Wall in Flood Damage Repairing of Wenshusha River

讨赖河属黑河一级支流,文殊沙河是讨赖河一级支流,是嘉峪关市内较大的汛期间歇性河道,河水主要是汛期祁连山浅山区及山前洪积扇面上的暴雨形成的地表径流洪水,洪水汇聚较快,来势凶猛,对防洪堤岸局部造成了破坏,危及左岸文殊镇部分农田和农业生产设施及财产安全。根据河道中下游地势平坦、行洪宽较窄和比降较陡等特点,对河床持续下切、不稳定段采用柔性格宾笼加卵石等措施进行修复处理,提高了堤防使用期,增强了河床稳定性。该水毁修复的实施,为行洪断面窄、比降较陡的汛期间歇性河道水毁修复提供了借鉴意义。

Taolai River is a first-level tributary of the Black River,and Wenshusha River is also a first-level tributary of Taolai River.It is a much more larger intermittent river channel in flood season of Jiayuguan City. The river water is mainly surface runoff flood formed by heavy rain in shallow mountainous areas of Qilian Mountains and in front of the alluvial fan’s area during flood season. The flood converges quickly and comes fiercely, causing damage to the local flood embankment and endangering the safety of some farmland, agricultural production facilities and property in Wenshu Town on the left bank. According to the characteristics of flat terrain, narrow flood discharge width and steep drop in the middle and lower reaches of the river, the continuous cutting and unstable sections of the river bed were repaired by using soft character Gabion cage and pebbles, which improved the service life of the embankment and enhanced the stability of the river bed. The implementation of the flood damage repair provides a reference for the intermittent river flood damage repair in flood season with narrow flood discharge section and steep flood drop.