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已有公路与铁路等线型工程的渣场选址,多以地形、植被、民房、地质灾害等为定性控制要素,除占地面积、容量外再无其他定量控制指标及计算依据,在实践中有随意性强、受主观意识影响大的弊端。以拉日铁路曲水区间段为例,将广泛应用于水土流失定量监测与侵蚀强度测算的137Cs示踪技术应用于渣场选址坡面侵蚀强度的定量计算。与传统的线型工程渣场选址方法进行对比,结果显示原项目水土保持方案确定的14个渣场仅1个选址合理,其他13个渣场均存在选址不合理问题,存在诸多的隐患。利用137Cs示踪技术分析坡面侵蚀强度拐点,得出渣场选址的坡长控制要素,较传统方法更契合选址背景环境的土壤侵蚀特征,为渣场选址及后期渣场水土流失防控人工干预手段选择提供了量化依据。
There are already some roadsides and railways, such as slag yard site selection, and more topography, vegetation, houses, geological disasters and other qualitative control elements, in addition to area, capacity and other quantitative control indicators and calculation of no other basis, in practice There is randomness strong, subjective awareness of the big drawbacks. Taking the section of Qushui section of Lalai Railway as an example, the 137Cs tracer technique, which is widely used in the quantitative monitoring of soil and water erosion and the calculation of the erosion intensity, is applied to the quantitative calculation of the erosion intensity at the siting site of the slag yard. Compared with the traditional linear project slag yard selection method, the results show that only one of the 14 slag yards determined by the original project is reasonable, and the other 13 slag yards have unreasonable site selection. There are many Hidden trouble. 137Cs tracing technique was used to analyze the inflection point of slope erosion intensity and the slope length control factors of the slag yard location were obtained. Compared with the traditional methods, the soil erosion characteristics of the slope environment were more suitable for the site selection of the slag yard and the later soil erosion prevention Control the choice of artificial intervention provides a quantitative basis.