During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally utilized.Besides,the vegetation recovery is slow in the spoil areas d...During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally utilized.Besides,the vegetation recovery is slow in the spoil areas due to the soil depletion.Aiming at recycling the solid waste,the sieved engineering waste slag with local red clay and corn straw biochar was supplied to solve the problem of insufficient nutrients in engineering waste slag and soil.In addition,planting experiments of alfalfa(Medicago sativa L.)and Amorpha fruticosa L.combined with physical and chemical experiments were carried out to prove the feasibility of the novel improved substrate for the reclamation of spoil areas.The results show that the substrate's improvement effect is mainly affected by the soil to slag ratio and the biochar content.The improvement effect of soil matrix in highway spoil area decreases with the increase of the waste slag content,especially when the soil-slag ratio is less than 3,and the promotion of plants is limited.On the contrary,the improvement effect is proportional to the biochar content(3%-8%).But it is noted that the Cu and Pb in the soil will exceed the clean limit corresponding to the Nemero soil pollution index level when the biochar content is 8%.Therefore,it is recommended that the soil-slag ratio should be≥3,and the biochar content should reach 3%-5%.This research provides experimental basis and technical support for utilizing solid waste resources in the reclamation of highway spoil areas.展开更多
为了弥补BIM建模软件Autodesk Civil 3D在水土保持工程设计中的局限性,解决传统弃渣场设计工作无专业辅助设计软件、信息化水平低、二三维设计转换困难等问题,利用C#语言、Winform界面开发、Civil 3D API及部件编辑器、MVC架构模式对Civ...为了弥补BIM建模软件Autodesk Civil 3D在水土保持工程设计中的局限性,解决传统弃渣场设计工作无专业辅助设计软件、信息化水平低、二三维设计转换困难等问题,利用C#语言、Winform界面开发、Civil 3D API及部件编辑器、MVC架构模式对Civil 3D平台进行二次开发。通过分析弃渣场各设计步骤的业务流程,研发了适用于水土保持工程弃渣场设计的专业平台,实现了容渣量分析、稳定性计算、以数据驱动为核心的快速建模与出图算量等功能,并应用于引洮供水二期(骨干)工程多个弃渣场的施工图设计中。结果表明:该平台将工程设计规范与带有步骤引导的可视化操作界面相关联,在弥补弃渣场设计无专业辅助软件的同时,极大地提高了设计效率和设计质量,有效地推动了弃渣场设计从二维向三维转换。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.52078034).
文摘During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally utilized.Besides,the vegetation recovery is slow in the spoil areas due to the soil depletion.Aiming at recycling the solid waste,the sieved engineering waste slag with local red clay and corn straw biochar was supplied to solve the problem of insufficient nutrients in engineering waste slag and soil.In addition,planting experiments of alfalfa(Medicago sativa L.)and Amorpha fruticosa L.combined with physical and chemical experiments were carried out to prove the feasibility of the novel improved substrate for the reclamation of spoil areas.The results show that the substrate's improvement effect is mainly affected by the soil to slag ratio and the biochar content.The improvement effect of soil matrix in highway spoil area decreases with the increase of the waste slag content,especially when the soil-slag ratio is less than 3,and the promotion of plants is limited.On the contrary,the improvement effect is proportional to the biochar content(3%-8%).But it is noted that the Cu and Pb in the soil will exceed the clean limit corresponding to the Nemero soil pollution index level when the biochar content is 8%.Therefore,it is recommended that the soil-slag ratio should be≥3,and the biochar content should reach 3%-5%.This research provides experimental basis and technical support for utilizing solid waste resources in the reclamation of highway spoil areas.
