浅谈危险废物处理处置工程的规划及设计

根据笔者近10年来在危险废物处理领域的体会,在探讨了危险废物处理处置工程规划和设计应遵循的原则、处理处置工程一般应包括的工程设施的基础上,重点探讨了危险废物处理处置工程的物流体系、规划和设计的具体方案及其应注意的问题。     

寻找失落的家园——韩国首尔市兰芝岛世界杯公园生态恢复设计

在20世纪70—90年代韩国经济高速成长时期,兰芝岛曾经是首尔市最主要的垃圾填埋场,因紧邻2002年世界杯足球赛上岩赛场而成为整个比赛场地的重要组成部分。在世界杯足球赛体育场馆建设过程中,兰芝岛被改造成为一座环境亲和型的城市公园。通过对兰芝岛垃圾山垃圾的形成、土地利用方式的选择和公园建设过程的回顾,总结了首尔世界杯公园的规划途径和公园设计过程中受污染场地受损生态系统修复所使用的基本方法,并指出对中国城市公园建设的借鉴意义。     

石油化工钢储罐地基处理技术规范SH／T3083—1997简介

中国石化总公司批准发布的《石油化工钢储罐地基处理技术规范》自１９９８年３月１日起施行，本文作者作为主要编制工作负责人，在对该规范内容予以简要介绍的同时，对该规范的编制过程和特点进行了深入说明，以利其在石化储罐建设工程中发挥应有的效益。     

防渗帷幕在我国生活垃圾填埋场中的应用前景

从防渗角度出发，论述了在有条件的生活垃圾卫生填埋场的用防渗帷幕的可能性，并用实例证明了其技术上的可行性。从建设投资上分析，防渗帷幕大大低于水平人工防渗垫层，为我国生活垃圾卫生填埋场建设的防渗措施，提出了一条新思路。     

Landslide and mudflow disaster in disposal site of surplus soil at Higashi-Hiroshima due to heavy rainfall in 2009

The collapse of a filling occurred due to heavy rain in Higashi-Hiroshima City׳s Shiwa District at about 5:30 am July 25th, 2009. The filling was made of surplus soils, and it contained a mass of water supplied from rainfall and ground water flow of a permeable layer at the bottom of the filling. The collapsed soil flowed down and destroyed a house. In this paper, the cause of this disaster is discussed. The site of the disaster was used as the dumping site of surplus soils, after several changes of ground formation. The history of the geographical change was reconstructed by the image processing of old map, aerial photographs, result of 3-dimentional laser survey carried out after collapse and the measurement of thickness of collapsed soil by dynamic cone penetration test. According to the result of processing, the shape and the size of the filling before collapse was reconstructed. The relationship between the rainfall and the groundwater in the river sediments layer over which the filling was constructed was determined. A stability analysis of the filling was conducted considering the rise of the groundwater level in the filling and the laboratory measured strength parameters. The results of the stability analysis showed that the collapse would have taken place when the groundwater level rose by about 9 m due to the supply of groundwater through the river sediments layer.     

Memory leak detection in Java: Taxonomy and classification of approaches

Memory leaks are usually not associated with runtime environments with automatic garbage collection; however, memory leaks do happen in such environments and present a challenge to detect and find a root cause. Currently in the industry manual heap dump analysis is the most popular way of finding memory leaks, regardless of the number of automated methods proposed by scientists over the years. However, heap dump analysis alone cannot answer all questions needed to fix the leak effectively. The current paper reviews memory leak detection approaches proposed over the years and classifies them from the point of view of assessed metrics, performance overhead and intrusiveness. In addition, we classify the methods into online, offline and hybrid groups based on their features.     

多绞屏蔽线处理及焊接工艺

介绍了屏蔽线的分类及结构组成;分别以线束中含有少量屏蔽线和多股屏蔽线为例,通过分步说明和图例示范,阐述了两大类情况下,各种屏蔽线的处理方法;并对各种处理方法的应用场合和实际特点给予了重点说明;最后,结合实际工作经验,对多绞屏蔽线处理过程中的常见问题及注意事项进行了归纳和总结.     

LQY-800压缩机的机体结构可靠性优化设计

对垃圾压缩机中所常用的LQY-800型压缩机的机体结构设计进行了研究.针对垃圾压缩机的工作特点,分析了机体设计要求;根据机体的受力特性对底板进行了相关的设计和计算;根据流体力学原理对机体倾斜方案进行了分析和相关计算;对机体的尺寸和结构强度进行了详细的设计和计算,以满足垃圾压缩机整体的可靠性要求.     

腐殖酸对Tc价态影响研究

在模拟高放废物深地质处置环境的低氧(O2含量小于5×10-6)、低Tc(Ⅶ)初始浓度(10-8 mol/L)条件下,研究腐殖酸浓度对Tc(Ⅶ)价态影响。结果显示,腐殖酸对99Tc液闪测定存在淬灭效应,但当腐殖酸浓度在40 mol/L以下,保持闪烁液体积为样品体积20倍可消除影响;在此基础上分别用四苯砷氯-氯仿萃取法和LaCl3沉淀腐殖酸法独立进行腐殖酸-Tc(Ⅶ)体系中锝价态研究,所得Tc(Ⅳ)和Tc(Ⅶ)价态分布结果基本吻合,表明两种研究方法均可用于腐殖酸-Tc(Ⅶ)体系中低浓度Tc价态研究;研究发现平衡350天的不同浓度Fluka腐殖酸-Tc(Ⅶ)体系中,Tc(Ⅶ)浓度长期保持稳定,而Tc(Ⅳ)浓度很低,表明即使在低氧气氛中,Fluka腐殖酸也未对Tc(Ⅶ)表现出明显还原行为,腐殖酸在地下水中的存在可能是高放废物地质处置中Tc(Ⅶ)阻滞的不利因素。     

西北处置场低、中放固体废物处置实践

介绍了我国西北处置场的基本情况,西北处置场低、中放固体废物接收、处置的组织机构及管理体系,工艺技术,辐射防护及环境监测,以期为我国放射性废物处置工程提供借鉴和支持。