国道G325改线工程水土保持方案变更分析

Analysis on Change of Water and Soil Conservation Scheme of National Highway G325 Route Change Project

国道公路建设中往往因用地条件、设计变更、自然环境因素等会不可避免地发生工程防治范围的调整与优化,水土保持方案也随之发生变更。文章结合国道G325线鹤山大雁山至桃源段改线工程,全面分析原水土保持方案中水土流失防治范围、土石方挖填、工程规模及施工道路、植物措施总面积等方面变更是否属于重大变更。分析结果表明土石方挖填变更、植物措施面积变更属于水土保持重大变更,需要编制水土保持方案变更报告,并报原审批机关批准。变更后通过实施针对性的水土保持措施,可实现水土流失防治目标,达到预期水土保持效益。以期能够为类似国道公路项目的水土流失变更分析提供一定参考和借鉴。

In the construction of national highway,the adjustment and optimization of engineering control range would inevitably occur due to land use,design change and natural environment factors,and the water and soil conservation scheme would also be changed.Combined with the re-routing of the section of National Road G325 from Heshan Dayan Mountain to Taoyuan,this paper comprehensively analyzes whether the changes in the scope of soil and water loss control,earthwork excavation and filling,project scale,construction road and total area of vegetation measures in the original soil and water conservation scheme belong to major changes.The results showed that the change of earth-rock excavation and filling and the change of plant area were important changes of soil and water conservation,and it was necessary to compile the change report of soil and water conservation plan and submit it to the original examination and approval authority for approval.After the alteration,targeted soil and water conservation measures could achieve the goal of soil and water loss prevention and control,and achieve the expected benefits of soil and water conservation.It is expected to provide some reference for the analysis of soil and water loss variation in similar national highway projects.