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1.
谭瑞锋 《山西建筑》2007,33(35):333-334
结合工程概况,介绍了隧道防排水施工流程及防排水的施工设计程序,并对隧道渗漏水的处理施工流程及其工艺进行了详细阐述,指出使用该施工技术从根本上解决了该隧道结构的渗漏水现象,并取得了良好的效益,值得推广应用。  相似文献   

2.
李桂云 《山西建筑》2004,30(13):187-188
介绍了山西雁门关隧道防排水的具体设计方法,阐述了防排水工程的施工方法,指出隧道防排水设计是隧道设计中的重要环节之一,对隧道的施工、运营起关键作用,必须高度重视。  相似文献   

3.
梁永忠 《山西建筑》2010,36(11):311-313
结合客运专线隧道施工实例,阐述隧道防排水的主要施工工艺,提出防排水施工质量控制的要点及控制检查的方法,以积累隧道防排水施工经验,从而保证隧道工程的质量。  相似文献   

4.
刘志远 《安徽建筑》2009,16(4):74-75,77
针对电气化铁路跨线桥施工的防电要求,结合杭州市德胜快速路高架桥跨浙赣电气化铁路的施工特点,详细说明了防电设施在跨线桥施工中的应用及安全施工技术。  相似文献   

5.
高等级公路隧道防排水设计及施工技术探讨   总被引:1,自引:0,他引:1  
郭卫琦 《山西建筑》2012,(31):193-194
针对高等级公路隧道防排水设计与施工技术,从隧道防排水设计目标、施工防排水要求、适用原则等方面作了论述,并提出了防排水工程的施工要点,为解决公路隧道工程渗漏水、冻害等问题提供借鉴。  相似文献   

6.
翟本超 《山西建筑》2005,31(19):117-118
结合湖南省某高速公路工程概况,介绍了防排水设计的原则,从排水管施工、止水带施工、EVA复合防水板施工等方面,对防排水施工技术作了阐述,确保了结构、设备的正常使用和行车安全。  相似文献   

7.
王静  蒋强盛 《砖瓦》2023,(11):152-154
在房屋建筑工程建设过程中需避免出现渗漏情况,以保证房屋建筑施工质量,改善房屋建筑使用功能。为此,首先对防渗漏施工技术发展现状以及防渗漏施工的重要意义进行介绍,然后结合实例对房屋建筑工程施工中的防渗漏技术要点进行详细探究。  相似文献   

8.
何义军 《山西建筑》2006,32(13):291-292
结合贾沟隧洞工程实例,详细探讨了隧洞防排水施工要点,对三道防排水防线进行了详细阐述,以保证每道工序的施工质量,从而保证隧洞防排水工程的质量。  相似文献   

9.
通过在新建沥青路面检查井防沉降井盖的施工实践,总结新建检查井防沉降井盖座的施工经验、施工工艺流程及操作要点,以期对同类工程的施工具有指导借鉴作用。  相似文献   

10.
防渗漏技术在民用建筑工程中的应用   总被引:2,自引:2,他引:2  
王海旺  张永红 《山西建筑》2004,30(14):92-93
结合工程实例,介绍了抗渗混凝土和SBS防水卷材的防渗漏施工工艺,从设计用料、屋面防渗漏施工、管道防渗漏施工等方面进行了论述,指出该工程防渗漏方法得当,取得了一定效果。  相似文献   

11.
Summer and winter discomfort in terms of heat and cold stresses in the nine major architectural climate zones and sub-zones across China in the 21st century were investigated using predictions from general circulation models for the low and medium emissions scenarios. For the six severe cold and cold climate zones in the north, reductions in cumulative cold stress outweighed the increase in cumulative heat stress resulting in an overall decreasing trend in the annual cumulative stress, and vice versa for the other three warmer climate zones in the south. Compared with the 20th century, significant reduction in the cumulative cold stress was observed across the six zones in severe cold and cold climates, ranging from 15.8 in cold-III to 42.3 in severe cold-II. There were modest increases in the cumulative heat stress from 0.3 in cold-II to 12.3 in cold-III. For the warmer climates in the south, reduction in cumulative cold stress ranged from 7.6 in hot summer and warm winter (HSWW) to 10.3 in hot summer and cold winter, while cumulative heat stress increased from 9.9 in the mild zone to 30.6 in HSWW. A reduction in cold stress would result in less winter heating and an increase in heat stress more cooling requirement.  相似文献   

12.
Small scale miners use mercury to extract gold from ore in many countries. An environmental and health assessment was performed in Indonesia in two regions, Galangan in Central Kalimantan and Talawaan in Northern Sulawesi. The environmental assessment showed severe mercury contamination of the sediments, and increased mercury levels in local fish. For the health investigation 281 volunteers were recruited and examined by a standardized questionnaire, a neurological examination and neuro-psychological tests. A medical score was used consisting of significant factors of mercury intoxication. Mercury exposed workers showed typical symptoms of mercury intoxication, such as movement disorders (ataxia, tremor, dysdiadochokinesia, etc.). Blood, urine and hair samples were taken from any participant and analyzed for mercury. The mercury concentration in the biomonitors was high, partly extreme high in the working population, increased in the population living in the same habitat and low in the control group. By a standard protocol which includes a combination of threshold values of mercury in the biomonitors and a medical sum score the diagnosis of chronic mercury intoxication was made for highly burdened workers (amalgam smelters) in 55% in Sulawesi and in 62% in Kalimantan. Less exposed mineral processors and the general population in the mining areas were also intoxicated to a high percentage.  相似文献   

13.
杜诚 《建筑与环境》2010,(1):170-174
随着国内中西建筑文化交流研究的拓展与深化,近代西方基督教会在华营建活动及其建筑渐为学术界所关注。通过对近代中国以及西方教会宗主国—英国(为例)同期教堂建筑样式进行对比,阐释近代中西建筑文化交融中错综复杂的建筑现象,揭示近代教堂建筑发展的特征、规律。  相似文献   

14.
We studied the effects of flow velocity on the formation of biofilms and the concentration of bacteria in water in copper and plastic (polyethylene, PE) pipes. The formation of biofilms increased with the flow velocity of water. The increase in microbial numbers and contents of ATP was clearer in the PE pipes than in the copper pipes. This was also seen as increased consumption of microbial nutrients in the pipeline system. This indicates that the mass transfer of nutrients is in major role in the growth of biofilms. However, the increased biomass of biofilms did not affect microbial numbers in the water. Rapid changes in water flow rate resuspended biofilms and sediments which increased the concentrations of bacteria and copper in water. The disturbance caused by the changing water flow was also seen as an increase in the particle counts and water turbidity recorded with online instrumentation.  相似文献   

15.
依托某破碎花岗岩巷道工程,以多孔介质中气体的渗流理论为基础,综合考虑影响氡在破碎花岗岩山体及巷道中运移和析出的多种因素,构建了氡的数值计算模型,给出了山体和通风巷道中的氡浓度计算公式,模拟并比较了自然状态和微正压通风状态下山体中氡浓度分布的变化情况,并对微正压通风状态下巷道中氡浓度的变化情况进行模拟和验证。研究结果表明:扩散作用和渗流作用是巷道围岩中氡运移的主要机制;微正压通风条件下巷道中氡的运移主要受通风作用、围岩的射气作用和氡的衰变作用共同影响;微正压通风能够改变围岩中氡的渗流方向,是巷道降氡的有效手段。  相似文献   

16.
探究“虚实”空间关系,创造个性化的城市空间场所   总被引:1,自引:1,他引:1  
黄春华  周安伟 《规划师》2003,19(3):39-41
作者利用空间的“虚、实”概念,结合格斯塔心理学的“图底”关系,类比分析中国水墨画的留白艺术手法及生态系统中的细胞繁衍规律,通过张家界城市绿化广场周边地段的概念设计的创作实践,提出创造个性化的城市空间场所工作中虚实空间的理念与原则目标。  相似文献   

17.
The practice of architecture is very similar in different national settings despite what may be very different sociological and cultural origins of the profession, the attendant variances in how work is organized and distinctions in equality and gender roles. The aim of this paper is to examine the quest for equality in architecture for women in the UK and Spain reporting the findings of a comparative study into women architects’ careers in the two countries. Within the qualitative paradigm, semi-structured in-depth interviews were carried out with a total of 55 women architects in the UK and Spain. Findings indicate surprising differences in levels and terms of equality for women in the two countries and marked differences in women’s experiences of working as an architect. Women have come to the profession in Spain much later than their British counterparts and, somewhat surprisingly, are present in greater numbers. However, despite there being more of a ‘critical mass’ this has not served to improve their situation; they report much higher levels of discrimination and find it difficult to progress in their careers. Conclusions argue for a stronger approach by the professional bodies to help improve the position of women.  相似文献   

18.
The weathering of arsenopyrite (FeAsS) has been monitored in soils using an in situ experimental approach. Arsenopyrite in nylon experimental bags was placed in individual horizons in soils in spruce (litter, horizons A, B, and C), beech (litter, horizons A, B, and C) and unforested (horizons A, B, and C) areas and left in contact with the soil for a period of 1 year. The individual areas on the ridge of the Krušné hory Mts., Czech Republic, had the same lithology, climatic and environmental conditions. Scorodite (FeAsO4·2H2O) was identified as a principal secondary mineral of arsenic (As) formed directly on the surface of the arsenopyrite. Scorodite was formed in all the areas in all soil horizons. The amount of scorodite formed decreased in the series beech, spruce and unforested areas. In forested areas, there was a larger amount of scorodite on arsenopyrites exposed in organic horizons (litter, A horizon). The greater rate of arsenopyrite alteration in organic horizons in the beech stand compared to spruce stand is probably a result of faster mineralization of organic material with resulting production of nitrate and better seepage conditions of soil in this area. Speciation of As determined using the sequential extraction technique demonstrated that As was bonded in the soils primarily in the residual fractions prior to the experiment. The As content in the mobile fractions increased in the organic horizon in the forested areas after the experiments.  相似文献   

19.
绿道在中国经过多年实践发展,在理论内涵、规划选线、综合效益等各方面都已有许多成果支撑.基于可公开获取的一系列文献资料,立足于绿道在中国各省市近20年的具体实践过程,梳理绿道在规划体系中的角色转变、在指标设置中的逐步细化和在管控上的落实方式,总结绿道实践在中国从提级统筹、常态认同到制度并轨3个阶段的发展变化,在展望绿道后...  相似文献   

20.
Mercury (Hg) contamination in tundra region has raised substantial concerns, especially since the first report of atmospheric mercury depletion events (AMDEs) in the Polar Regions. During the past decade, steady progress has been made in the research of Hg cycling in the Polar Regions. This has generated a unique opportunity to survey the whole Arctic in respect to Hg issue and to find out new discoveries. However, there are still considerable knowledge gaps and debates on the fate of Hg in the Arctic and Antarctica, especially regarding the importance and significance of AMDEs vs. net Hg loadings and other processes that burden Hg in the Arctic. Some studies argued that climate warming since the last century has exerted profound effects on the limnology of High Arctic lakes, including substantial increases in autochthonous primary productivity which increased in sedimentary Hg, whereas some others pointed out the importance of the formation and postdeposition crystallographic history of the snow and ice crystals in determining the fate and concentration of mercury in the cryosphere in addition to AMDEs. Is mercury re-emitted back to the atmosphere after AMDEs? Is Hg methylation effective in the Arctic tundra? Where the sources of MeHg are? What is its fate? Is this stimulated by human made? This paper presents a critical review about the fate of Hg in the Arctic tundra, such as pathways and process of Hg delivery into the Arctic ecosystem; Hg concentrations in freshwater and marine ecosystems; Hg concentrations in terrestrial biota; trophic transfer of Hg and bioaccumulation of Hg through food chain. This critical review of mercury fates and contamination in the Arctic tundra ecosystem is assessing the impacts and potential risks of Hg contamination on the health of Arctic people and the global northern environment by highlighting and “perspectiving” the various mercury processes and concentrations found in the Arctic tundra.  相似文献   

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