西山隧道衬砌渗漏水处理方法

隧道的渗漏水不仅降低混凝土的耐久性,而且影响隧道各种设施的使用功能和恶化隧道的环境。因此公路隧道设计规范要求一般公路隧道应“边墙、拱部不滴水,路面不冒水、不积水”,汽车专用隧道则应达到“拱部、墙部及设备洞处均不渗水”。隧道的防排水应视隧道的水文地质情况采取“以防为主,防排结合”的原则设计施工,若防水措施不理想,作为补救措施的渗漏水处理方案就显得非常重要了。萧山市西山隧道长205m,净宽14m,开挖断面达100～140m2。隧道埋深不大,但围岩裂隙发育,透水性好。由于该隧道位于市区,是结合大口径给水管埋设而建成的城市交通隧…     

武广客运专线大瑶山1~#隧道衬砌结构防排水施工技术

武广客运专线大瑶山1#隧道防排水系统施工质量的好坏,直接影响隧道工程整体质量和运营使用,采用"防、排、堵、截结合,因地制宜,综合治理"的原则。重点介绍了防水板和纵环向双壁打孔波纹管排水管无砂砼排水体在客运专线隧道中的应用。     

塑料板防水技术在隧道工程中的应用

以聚乙烯塑料防水板为主要防水结构的复合式防排水系统是隧道防排水的发展趋势。以沈本高速公路大峪隧道为例，介绍了隧道塑料板防排水体系及施工技术。     

工程建设项目信息

青浦第二水厂深度处理工程 所属地区：上海 项目简介：青浦第二水厂工程项目将进行40万m^3／d深度处理设施建设,项目建成后二水厂达到40万m^3／d制水规模和深度处理规模。工程拟新征土地7．6ha（含三期扩建工程）,     

新型聚合物钻井液体系在麻黄山地区的应用

麻黄山地区位于鄂尔多斯盆地西缘断褶带。2002年前由于钻井液体系选择不当，钻井过程中不同程度地存在井塌、埋钻和井漏等工程事故。自2002年后选择了比较合理的钻井液体系，目的层采取了适宜本地区储层特点的储层保护措施，勘探成果有了重大突破。其中MC-2井原油初产50m^3／d，稳产20m^3／d。开创了麻黄山地区石油勘探新局面。     

公路隧道二衬混凝土防脱空施工技术研究

隧道二衬混凝土背后脱空是隧道工程常见的质量缺陷,对隧道二次衬砌混凝土脱空病害进行了系统分析,并对病害成因进行了分类;针对脱空病害的成因,分别从爆破开挖、初期支护施工、防水板施工、模板及混凝土浇筑施工等方面介绍了二衬混凝土防脱空施工技术;并进一步介绍了混凝土脱空病害的处治技术。     

尾排巷在高瓦斯薄煤层中的应用

洪发煤矿为高瓦斯矿井,全矿绝对瓦斯涌出量6．43m^3／min,2206工作面绝对瓦斯涌出量4．5m^3／min。该面通过采用尾排巷、尾排巷留管等瓦斯综合治理技术,瓦斯抽排量平均为3．2m^3／min,抽排率达70％,确保了安全高效开采。     

广州市康王路下穿隧道防水工程

简述了广州市康王路下穿隧道工程外防水施工，着重介绍了施工设计原则，施工工艺和技术要求，以及隧道工程一些特殊部位的防水施工处理方法。     

东秦岭隧道平面控制测量

介绍东秦岭隧道采用GPS技术进行平面控制测量，包括控制网的设计、施测、数据处理以及精度评价和分析，同时对长大隧道的平面控制测量提出一些建议。     

彭水隧道新型防水材料施工技术

为了落实渝怀总指“彭水隧道不渗不漏”的要求，在隧道的施工中，采用了以辅设新型防水材料WRM100—复合防水板为综合防水技术措施，在施工实践中，创造性地解决了各种技术问题，形成了一套系统完整的工艺方法，收到了良好的效果。     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

2014 second batch of rare earth quota released

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