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本文在对西江龙圩水道河性和浅滩成因分析的基础上,对中、右两支通航工程可行性进行了全面地试验研究。定床试验表明,由于河形、地质、流态、经济以及施工条件等方面的原因,中支航道难以满足新的通航标准。而右支通过对原设计方案的修改却能达到新的通航标准要求。为了论证这一结果,又对定床选定方案进行局部河段的动床河工模型试验,同时还进行各种建筑物作用的对比试验,以寻求各建筑物的最佳尺度与组合。试验表明,经动床修改后的方案不仅可以满足新的航行尺度要求,流态平顺,同时改善了地方航运条件和沿江码头前沿水深,从而使整治工程进一步完善。
Based on the analysis of the causes of channeling and shoals in the Longxu waterway of Xijiang River, this paper comprehensively studies the feasibility of the two navigation projects in the middle and the right. Bedding tests show that due to the river shape, geology, flow, economy and construction conditions and other reasons, it is difficult to meet the new shipping standard for navigable waterways. The right branch through the original design changes can meet the new navigation standard requirements. In order to demonstrate this result, we also carry out the model test of bed-borne plan for the movable river bed model of partial river sections, and carry out comparative tests on various building functions to find the best scale and combination of each building. The test shows that the modified scheme of moving bed can not only meet the requirements of the new navigation standard and flow smoothly, but also improve the local shipping conditions and the water depth along the front of the wharf, so that the renovation project can be further improved.