金沙江向家坝四川岸翻坝运输方案经济比选

Economic comparison of dam-over turning transportation schemes in Sichuan bank of Xiangjiaba of the Jinsha River

为提升金沙江向家坝枢纽过坝运输能力、缓解库区下行货物运输拥堵,拟建设向家坝四川岸翻坝运输系统,提出了3个运输通道方案。为选出经济合理的建设方案,依据向家坝、溪洛渡已建翻坝运输系统调研数据以及向家坝过坝运量预测,逐项分析、估算各方案的运营成本和营业收入。采用最小费用法、最低价格法等对3个互斥型方案从全寿命周期的角度进行经济比选,并从争取补助资金、采用分期建设等方面对方案优化提出建议。结果表明:采用高线改建老路、低线建设皮带机的方案费用现值、费用年值、运输包干价均为最小,是从经济角度的推荐方案。优化后的方案进一步提升了经济性,增强了项目竞争力及抗风险能力。

In order to enhance the dam-passing transportation capacity of the Xiangjiaba hub of the Jinsha River and alleviate the transportation congestion of downstream goods in the reservoir area, this paper tends to build a dam-overturning transportation system for the Sichuan bank of Xiangjiaba and proposes three transportation channel schemes. In order to select an economic and reasonable construction scheme, the paper analyzes and estimates the operation cost and operating income of each scheme item by item according to the survey data of built dam-overturning transportation systems in Xiangjiaba and Xiluodu and the forecasted dam-passing traffic volume of Xiangjiaba. In addition, the paper conducts an economic comparison among the three mutually exclusive schemes from the perspective of the whole life cycle through the minimum cost method and minimum price method and puts forward suggestions for optimizing the schemes in terms of obtaining subsidy funds and adopting phased construction.The results show that the present cost, annual cost, and transportation lump sum of reconstructing old roads with high-speed lines and constructing belt conveyors with low-speed lines are the lowest, and the scheme is recommended from an economic perspective. The optimized scheme further improves the economy and enhances the competitiveness and anti-risk ability of the project.