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运用模糊综合评判法与离散抽样模型,对渝-怀铁路干溪沟隧道Dk278+628至+678段隧底填充性岩溶软基处理方案进行了评价和选择,从而使所选择的处理方案达到整体最优,该评价方法可为今后类似的工程处理提供借鉴。 相似文献
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扁铲侧胀试验在地基处理效果评价中的应用 总被引:2,自引:1,他引:1
将扁铲侧胀试验用于某高速公路软基处理效果的评价中,检验不同技术方案处理软土地基的加固效果,研究扁铲侧胀试验用于软基加固效果评价的适用性和特点。结果表明,由扁铲侧胀试验确定的地基土不排水抗剪强度和压缩模量可以直观地反映地基加固前后的力学性能变化。扁铲侧胀试验以其准连续性和对土性变化的灵敏性,用于软土地基加固效果的分析和评价是可靠的。 相似文献
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本文针对湘潭-耒阳高速公路K132+362-K132+450段软基处理方案的比选和设计,提出了适宜本段软基处理的钢筋石桩方案,其有效性便捷性大大降低了工程造价和满足工程质量及工期要求。 相似文献
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分析煤炭开采对地下水水质、水量和水平衡等方面的影响。结合《环境影响评价技术导则地下水环境》(HJ610-2011),讨论煤炭开采的地下水环境影响评价相关内容。提出煤炭开采的地下水环境影响评价按Ⅱ类项目执行,评价级别为二级及以上,必要时,可依据项目特征、影响程度等因素,对井区(Ⅱ类)和排矸石场等(Ⅰ类)进行分区评价;监测、评价因子选择应综合考虑常规指标、国家和地方控制污染物指标以及煤炭行业特征污染因子等建议。 相似文献
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通过对福宁高速公路软土地基沉降观测数据的分析及对最终沉降量的推算,指出软基处理工后沉降的不可避免性;同时,通过对本工程出现异常情况产生原因的分析,提出软基加固处理的调整方案。 相似文献
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基于MATLAB-NNT的高速公路软基处理方案决策模型 总被引:3,自引:2,他引:3
首先介绍了中国高速公路软基处理技术决策问题的研究现状,然后介绍了人工神经网络(ANN)BP模型和MATLAB神经网络工具箱(NNT)。最后以沪宁高速公路软基地质条件为实例,以MATLAB-NNT为工具,建立了高速公路软基处理方案的ANN决策模型,对所建立的ANN模型进行训练、回判和预测,得到了满意的结果,证明模型是有效的。 相似文献
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层析分析法在高速公路生态环境影响评价中的应用 总被引:3,自引:0,他引:3
通过介绍层次分析法的基本原理、步骤和计算方法,将层析分析法应用到高速公路生态环境影响评价研究中,以宝(鸡)天(水)高速公路为例,将此方法运用在公路生态环境影响评价的方案比选问题中进行分析.评价结果表明:层次分析法不仅是处理公路建设生态环境影响评价中方案比选问题的有效手段,而且提高了权重定量的理性成分,其评价结果与实际结果具有较好的一致性.最后论述层析分析法在高速公路生态环境评价中的优缺点,以此为今后高速公路生态环境影响评价研究提供参考依据. 相似文献
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在研究煤田火区对自然-社会经济系统影响的基础上,提出了煤田火区环境影响综合评价指标体系的构建思路,建立了煤田火区环境影响评价的一般性指标体系,包括5级32个指标。以内蒙古乌达煤田火区为实例,论述了煤火环境影响综合评价的实施过程。根据煤田火区特征,在一般指标体系框架内确定了23个评价指标,采用层次分析法与综合指数法相结合,建立了火区环境影响综合评价公式。评价结果表明,乌达煤田火区对环境的影响为较严重水平,与定性分析结果相符。 相似文献
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Environmental impact assessment framework by integrating scientific analysis and subjective perception 总被引:5,自引:5,他引:0
Environmental impact assessment is widely recognized as an effective tool for supporting the sustainable development of the environment through policy, plan and program decision-making processes. Traditional approach of environmental impact assessment generally focuses on scientific analysis and neglects subjective utilities on the project development. This paper proposes a framework of environmental impact assessment process by integrating subjective perception and scientific analysis. This framework suggests that environmental impacts and their consequent effects are analyzed and calculated based on the inventory analysis, but the non-market loss arising from the construction of the sensitive facility is estimated by contingent valuation method and the relative importance of affecting groups in affecting the ongoing of project development is evaluated by analytical hierarchy process. Eventually, a mathematical model is presented to determine the optimal compensation amount under a targeted refusal rate. Also, a case example is presented to illustrate this approach that integrates the objectively scientific assessment for potentially environmental impacts and individual subjective perception on the non-market value of environmental damages arising from the project development. 相似文献
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建设项目环境影响评价中的环境经济损益分析部分,目前多是定性的简单分析,不能满足环境影响评价精度要求。本文对山东里能集团有限公司巨野矿区郓城矿井环境影响评价时,探讨了定量化的环境经济损益分析。 相似文献
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基于GIS技术环境影响评价的研究进展及展望 总被引:5,自引:0,他引:5
环境影响评价是确保经济社会发展与环境保护相协调的重要环节,传统环境影响评价(EIA)有很人的局限性,地理信息系统(GIS)以其强大的图形与数据处理功能在EIA上的应用,显示了其巨大的优势,介绍了在其基础上提出的数据库、模型库、方法库与GIS相结合的环境影响评价信息系统结构框图,在国内外学对GIS在环境影响评价研究现状分析的基础上,又对GIS在EIA中的研究前景做了展望。 相似文献
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This paper describes how to carry out environmental impact assessment in an environmentally sensitive zone.The principles,the train of thought and methods are proposed in this paper,We have made the water environmental impact assessment on the engineering project of technical reforms in Guiyang Battery Mill.The hasis for engineering construction and environmental protection in this mill has been laid dawn. 相似文献
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A. M. Martínez-Graña J. L. Goy y Goy Irene De Bustamante Gutiérrez C. Zazo Cardeña 《Environmental Earth Sciences》2014,71(1):39-51
A new procedure is proposed for joint strategic environmental assessment and environmental impact assessment using simultaneous characterizations in the protected natural area studied to analyse the importance and extent of the impact of human activities within this area on the various natural resources. GIS techniques were used to define territorial models, including environmental information criteria in thematic layers to facilitate environmental diagnosis in the early planning stages in the areas of concern or of higher quality for conservation at different working levels (municipal, district, provincial or national). Traditional conventional environmental impact assessment methods were improved, using spatial analysis to compare scenarios based on the spatial and temporal variability of the impacts identified and their evaluation. This method was applied to the natural space of Las Batuecas-S. de Francia and Quilamas, where in an initial stage the different anthropogenic activities (landfills, etc.) with the potential to cause direct (sewage waters, etc.) or indirect (leachate, etc.) impacts were identified, using checklists and double-entry matrices to analyse actions likely to cause impacts, developing the cartography and identifying environmental impacts potentially damaging to the natural environment. Next, thematic and interpretive mappings were drawn up (surface water quality, aquifer vulnerability to pollution and vulnerability to municipal solid waste) to assess the effects upon resources (water, soil, air, etc.). Finally, by overlapping the impact identification and vulnerability mappings (municipal solid waste, pollution of aquifers and surface water quality) the impact characterization mapping was obtained, showing the absorption capacity of the different sectors to help the responsible bodies set out preventive and/or corrective measures. The essence of this paper is, in methodological terms, its use of two methods simultaneously (strategic environmental assessment and environmental impact assessment) in a protected natural area, allowing it to be extrapolated to any area where territorial management and planning studies need to be carried out. 相似文献
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矿山开发给矿区环境带来了负面影响,对矿山环境质量进行评价是实现矿业可持续发展的必要手段。笔者建立了矿山岩土工程环境质量多目标评价指标体系,运用层次分析法确定出各个评价指标的权重; 规定了分级规则,并对各个评价指标进行了分级; 建立了矿山岩土工程体系环境质量多目标综合评价模型,并将该模型应用于矿山实际,得出该矿山环境质量较差,需及时采取措施进行治理。 相似文献
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矿产勘查活动往往会带来一定的生态环境影响,如何评估这些影响是当前矿产勘查所面临的迫切问题之一。本研究以广东省金矿资源最为集中的粤西金矿带为例,采用生态系统服务价值核算方法,利用单位面积生态环境价值,结合植被恢复时间和矿产资源潜力,量化评估粤西金矿带内的四个主要已知矿区勘查活动生态环境影响,进一步推测量化评估金矿带内其他具有类似成矿地质条件的预测单元勘查活动生态环境影响。评估结果表明:(1)粤西金矿带勘查活动生态环境影响成本较低,相对于其矿产资源潜力带来的社会经济效益而言,微乎其微;(2)广东省粤西金矿带下一步勘查工作方向仍应重点集中在金牛A类预测区、新洲A类预测区与高村A类预测区等资源潜力大、单位资源量生态环境成本低的区域;(3)本研究提出的勘查活动生态环境影响量化评估方法具有易操作、适用性广等特点,可用于其他地理环境下的勘查活动生态环境影响量化评估。 相似文献