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采矿塌陷区综合治理——以唐山市南部塌陷区为例 总被引:2,自引:0,他引:2
中国是矿产资源大国和矿业大国,矿产资源开发带来的塌陷给矿业城市的生态环境造成了严重的破坏。概括地介绍了我国采矿塌陷区的基本状况,分析了唐山市南部采矿塌陷区对生态环境的影响,并针对采矿塌陷区环境的污染问题,说明了利用采矿塌陷地进行生态修复是保护土地资源,恢复和治理生态环境的有效手段之一,研究性、探索性地提出了采矿塌陷示范区建设的技术措施,为采矿塌陷区的生态修复以及环境的综合治理做出了示范。 相似文献
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本文通过对路基塌陷区地形地貌、地质、水文等岩土参数条件进行分析,同时结合钻探和物探成果对路基塌陷成因进行探讨,对路基稳定性进行了验算,提出了有针对性的治理方案。 相似文献
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岩溶塌陷是斑竹地区主要矿山地质环境问题之一,其发展过程具有隐蔽性,发生亦具有突发性,是众多矿山地质环境问题中较为复杂且治理难度较大的一种。本文以资源枯竭型城市矿山地质环境治理项目“钟祥市矿山地质环境治理工程(斑竹岩溶塌陷区)”为依托,研究了斑竹地区岩溶塌陷形成机理、成因类型、致灾条件及影响因素;以系统平衡原理为基础,紧密结合该区岩溶塌陷的致灾条件和影响因素,针对性地提出了提出斑竹地区岩溶塌陷防治方案,以期对钟祥市地区的岩溶塌陷防治具有一定的参考意义。 相似文献
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结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。 相似文献
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This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer. 相似文献
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Vo Thi Yen-Phi Andrea Rechenburg Joachim Clemens 《The Science of the total environment》2010,408(9):2050-2053
Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l− 1, and were detected in all septage sludge samples with an average of 16,000 ova l− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage. 相似文献
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新时期广东城市化的新特点 总被引:4,自引:0,他引:4
新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。 相似文献
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浅谈我国工程项目建设成本控制存在的问题 总被引:2,自引:0,他引:2
结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。 相似文献
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针对由于建筑施工临时用电安全管理的不完善和不规范操作而导致大量工伤事故频频发生的问题,为消除用电安全隐患,对建筑施工临时用电安全管理进行了归纳和分析,并提出了整改意见,以确保现场人员及电气设备的安全运行。 相似文献
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安康市工程施工企业未来几年人才需求调查 总被引:1,自引:0,他引:1
为了不断提高工程类专业的办学质量,对安康市区主要施工企业或项目经理部未来几年人才需求状况进行了调查,同时提出相关建议,以期培养更多的该类专业人才,满足施工企业需求。 相似文献
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吐鲁番农村住宅冬季室内热舒适调查研究 总被引:1,自引:0,他引:1
对吐鲁番57户农村住宅中108名居民的热感觉、热舒适等进行了主观问卷调查,测试了温度、相对湿度等室内外环境参数,运用统计学分析方法对测试与调查结果进行了回归分析。结果表明,吐鲁番农村住宅冬季实测的热中性温度为19.3℃,预测热中性温度为21.2℃;通过两种计算方法获得的热期望温度分别为19.7℃和19.6℃;80%居民可接受的温度范围为15.2~27.4℃。由于受干热干冷的地域气候影响,冬季可接受的最低温度范围明显高于其他地区的农村住宅。 相似文献