粉煤灰综合利用 2017no.1 FLY ASH COMPREHENSIVE UTILVZATION 试验与应用 针片状含量对心墙沥青混凝土性能的影响研究 Study on the Effect of Needle Sheet Content on the Performance of Core Wall Asphalt Concrete 杨武,何建新,杨海华 (新疆农业大学水利与土木工程学院,乌鲁木齐830052) 摘要:为了得到针片状含量对心墙沥青混凝土性能的影响,分别设置了5%,15%,25%,35%,45%,55%,6 种不同针片状含量来制作沥青混凝土试件,对比其性能。结果表明:针片状含量在超过35%时,沥青混凝土性能将会 大大降低,从而影响工程质量 关键词:沥青混凝土;针片状;性能 2文献标识码:A文章编号:1005-8249(201 中图分类号:TU528.42文献标识码:A文章编号:1005-8249(201 Yang Wu ,He Jianxin ,Yang Haihua ( Collegeof Water Conservancy and Civil Engineering ,Xinjiang Agricultural University ,Urumqi 830052 ,China) Abstract :In order to get the effect of needle like content on the performance of core wall asphalt concrete ,it is set up separately5 %,15% , 25% ,35% ,45% ,55% ,6 kinds of different needle sheet content to make asphalt conerete specimens and pare its performance .The results show that when the needle flake content is more than 35% ,its performance will be greatly reduced ,thus influence the engineering quality . Keywords :asphalt concrete needle flake performance 在水利工程建设和施工的不断发展、安全性水 严格的控制这一指标。余志凯等2人提出在公路沥 平不断提高,在碾压式沥青混凝土心墙坝中,对心 青混合料中,针片状颗粒会使沥青混合料的强度降 墙沥青混凝土的骨料要求也越来越高。在实际的试 低。张金柱等(3人指出了在沥青混合料中,针片状 验与工程中,粗骨料对结果的影响是很显著的,也 含量...
2011年第10期(总第166期) 应用能源技术 23 针对600MW前后墙对冲燃烧优化模型的确立与分析 周思远,黄孝彬2,闫顺林 (1.华北电力大学动力工程系河北保定071003 2.北京华电天仁电力控制技术有限公司北京100039) 摘要:以600MW前后墙对冲燃烧锅炉为例,目标为寻求高效率低NOx排放,建立了燃烧 优化模型,对各个影响因素进行了分析,并且对性能量;状态量和调节量之间的关系进行了 描述。 关键词燃烧优化;性能量;状态量;调节量 中图分类号:TK411.26 TK411.26文献标志码:B文章编号:1009-3230(2011)10-0023-03 According to 600MW Opposed Wall Firing Optimization Model Establishment and Analysis ZHOU Si-yuan' ,HUANG Xiao-bin' ,YAN Shun-lin ( 1.North China Electric Power University Department of Power Engineering ,Baoding 071003 China ;2 .Beijing Huadian Tianren Power Control Technology Co .Ltd ,Beijing 100039 ,China ) Abstract :For 600MW opposed wall firing boiler as an example ,the target for high efficiency and low NOx emission ,bustion optimization model is established ,the impact of various factors are analyzed ,and the sexual energy state quantity and adjusting the relation between quantity are described Key words :Combustion optimization ;Energy ;State capacity ;Adjustment amount 0前言 安全,火焰均匀充满炉膛。不结渣不烧损燃烧器 通过燃烧优化提高电站锅炉燃烧效率、减少 和水冷壁、过热器不超温;使机组运行保持最高的 NOx的排放是最经济有效的方法之一。锅炉燃烧 经济性;减少燃烧污染物排放。 优化是通过对锅炉燃料供给和配风参数的调整。 针对锅炉为亚临界参数、自然循环前后墙对 以及对其控制方式的改变等,保证送人锅炉炉膛 冲燃烧方式、一次中间再热、单炉膛平衡通风、固 内的燃料及时、完全、稳定和连续地燃烧,并...
粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2018NO.4 试验与应用 金属网增强混凝士靶板的抗侵彻性能研究 Study on anti-penetration performance of metal mesh reinforced concrete target 陈首,石少卿,李季 (陆军勤务学院军事设施系,重庆401331) 摘要:本文利用有限元分析软件LS-DYNA对金属网增强混凝土靶板的抗侵彻性能进行数值研究,结果表明: 在混凝土靶板中增加金属网,可以有效抑制弹体动能在靶体内的传播,降低弹体侵彻深度和剩余速度,控制混凝土的 局部破坏和弹坑直径,提高混凝土靶板的抗侵彻性能.此外,分析比较金属网参数的变化对混凝土靶板抗侵彻性能的 影响,研究发现:增大金属丝丝径、减小金属网孔径、增大金属网层数均可以提高混凝土靶板的抗侵彻性能,而且, 当丝径取2mm 孔径取5mm 层数取22层时,混凝土靶板的抗侵彻性能最经济有效. 关键词:金属网;抗侵彻;数值研究 中图分类号:TU528.571 文献标识码:A 文章编号:1005-8249(2018)04-0023-05 Chen Shou Shi Shaoqing Li Ji (Army Logistics University of PLA Dept.of Military Facilities Chongqing 401331) Abstract:In this paper the finite element analysis software LS-DYNA is used to numerically study the anti-penetration performance of metal mesh reinforced concrete target.The results show that adding metal mesh in concrete target can effectively suppress the propagation of the kinetic energy of the projectile in the target reduce the penetration depth and residual speed of the projectile control the local damage of the concrete and the diameter of the crater and improve the anti-penetration performance of the concrete target.In addition the influence of the variation of the metal mesh parameters on the anti-penetration performance of the concrete target is analyzed and pared.It is found that increasing the wire diameter reducing the hole diameter and increasing the number of layers can improve the anti-penetration performance of the concrete target. Moreover when the wire diameter is 2 mm the hole diameter is 5 mm and the number of layers is 22 layers the anti-penetration performance of the concrete target is the most economical and effective. Keywords:metal mesh;anti-penetration;numerical study 混凝土因具有原材料丰富、价格低廉、施工方便、彻性能,国内外学者进行了大量的研究[461,目前最 经久耐用等优点,被广泛应用于防护工程领域[1-31. 常见的是在混凝土中添加纤维材料来提高它的抗拉 但是,作为一种脆性材料,混凝土的抗拉强度和延 强度和延展性,如碳纤维、钢纤维、聚合物纤维等. 展性均比较差,且容易开裂,在遭受高速冲击荷载 王璞等[自行设计了一套落锤冲击试验装置,对由 或爆炸荷载作用时,普通混凝土结构不能满足一般 碳纤维、钢纤维和聚丙烯纤维组成的混杂纤维混凝 的防护要求. 土进行了抗冲击力学性能试验研究,研究表明:纤 ...
粉煤灰综合利用 2011N.2 FLY ASH COMPREHENSIVE UTILIZATION 研 造孔剂种类对粉煤灰多孔陶瓷性能的影响研究 Research on the Effect of Pore-forming Agent on Properties of Fly Ash Porous Ceramics 付春伟,刘立强,于平坤,张国莹,张淑国 (山东建筑大学材料科学与工程学院,济南250101) 要:以工业废弃物粉煤灰为主要原料,采用添加造孔剂法,分别以淀粉和煤粉为造孔剂,模压成型,在1000℃固 相烧结制备粉煤灰多孔陶瓷,用SEM测试分析手段表征不同条件下粉煤灰多孔陶瓷的微观结构变化,研究了造孔剂种 类及用量对显气孔率抗弯强度、吸水率体积密度、耐酸碱性能的影响。 关键词:粉煤灰;多孔陶瓷;造孔剂;结构与性能 文章编号:1005-8249(2011)02-0012-05 Fu Chunwei ,Liu Liqiang ,Yu Pingkun ,Zhang Guoying ,Zhang Shuguo Abstract :Fly ash porous ceramics are prepared from waste fly ash by adding pore-forming agent and molding pression at sintering temperature .Coal powders and starch are used as pore-forming materials .Using SEM testing method the microstructure change of fly ash porous ceramics under different conditions are characteriaed .The affects of the pore type and dosage on apparent porsity ,bending strength ,water ,bulk density and acid properties are studyed . Key words :fly ash ,porous ceramics ,pore-forming agent ,structure and properties 多孔陶瓷是一种含有较多孔洞的材料,它利用材 到保护环境的目的。2006年任祥军以粉煤灰为主要 料中孔洞的结构和大的比表面积,结合材料本身的材 原料,采用模压成型和挤压成型工艺,烧结制备多孔陶 质,来达到所需要的热、电、磁、光等物理及化学性能, 瓷过滤膜,当造孔剂添加量20%、烧成温度1250℃时, 可用作过滤分离、分散、渗透、隔热、换热、吸声、隔音, 样品的孔隙率为51....
2013年3月上 施工技术 第42卷第5期 CONSTRUCTION TECHNOLOGY 101 DoI:10.7672//gj2013050101 通道塔在香港环球贸易广场工程中的应用 乔龙,李娟,石伟,高洪刚,李新生 (中建三局第一建设工程有限责任公司,湖北武汉430040) [摘要]通道塔以钢结构塔为附着载体和通道,用来完成超高层建筑施工中大量和繁重的垂直运输任务。结合香 港环球贸易广场项目详细介绍了通道塔的设计制作、安装及维护和拆除。工程实践表明,使用通道塔可节约施 工场地,规避常规主体因周边分散布置施工电梯而无法装修封闭的问题,加快了装修进度,使得施工对下部运营的 影响降低,真正实现了超高层建筑阶段性投入使用的目标。 关键词】高层建筑;通道塔;垂直运输;运输通道;设计;安装 中图分类号TU758.11 文献标识码A [文章编号】1002-8498(2013)05-0101-03 Application of Access Tower in the International Commerce Plaza Project in Hong Kong Qiao Long ,Li Juan ,Shi Wei ,Gao Honggang ,Li Xinsheng ( TheFirst Construction Co ., .of China Construction Third Engineering Bureau ,Wuhan ,Hubei 430040 ,China ) Abstract :Access tower uses steel tower as carrier and access route and is used for vertical transport in construction of super tall buildings .Combined with the International Commerce Plaza Project in Hong Kong ,the authors introduce access tower in detail ,including its design ,manufacture ,installation , maintenance and demolition .The engineering practice shows that using access tower can save construction site ,allow closed decoration ,speed up decoration progress and reduce the influence of construction on lower floor operations ,w...
施工技术 2011年10月下 CONSTRUCTION TECHNOLOGY 第40卷第351期 通省特长隧道软岩大变形机理及处治措施 沈峰,成词峰2,刘桂兵 (1.湖北省高速公路集团有限公司,湖北武汉4300512.中国地质大学工程学院,湖北武汉430074 3.中铁十七局集团第三工程有限公司,河北石家庄050081) 摘要]在现场调研及隧道监控量测的基础上,研究了十至房县高速公路通省隧道施工中出现的大变形问题,通 过分析该隧道大变形破坏的特点,从围岩岩性条件、工程结构受力和施工因素等方面对该隧道的大变形机制进行 了研究。结果表明通省隧道发生大变形的主导因素是隧道所处的地质环境和软弱围岩,而施工开挖卸荷是产生大 变形的诱因。结合研究成果提出针对大变形段的治理措施,监控量测结果表明该治理措施取得较好效果。 关键词】隧道工程;软岩变形;监测 中分类号]U213 文献标识码]A [文章编号】1002-8498(2011)20-0046-04 Mechanism and Control Measures of Large Deformation of Tongsheng Tunnel Shen Feng' ,Cheng Cifeng ,Liu Guibing ( 1.Hubei Expressway Co ..Wuhan ,Hubei 430051 ,China ;2 .Faculty of Engineering ,China University of Geosciences ,Wuhan ,Hubei 430074 ,China ;3 .CR17BG No .3 Engineering Co ..Shijiazhuang ,Hebei 050081 ,China ) Abstract :Based on field investigation and monitoring measurement ,the large deformation of Tongsheng tunnel on Shiyan-Fangxian Highway is studied .By analyzing the features of deformation and failure of the tunnel ,the mechanism of large deformation is discussed from surrounding rocks conditions ,construction factors and construction .It is found that the special geological environments and soft surrounding rocks caused the large deformatio...
38 当代化工研究 Intermediate 技术应用与研究 2017·08 透明塑料彩色条纹的研究 韩烨飞 (南京市第二十九中学江苏210000) 摘要:本文主要探究了生活中透明塑料彩色条纹现象的产生原因在实验中先调整自然光照射在透明塑料制品上的入射角,以此找到布 儒斯特角,并以布儒斯特角照射具有应力的透明塑料,同时产生双折射,我们将这个过程等价于显色偏振来解释透明塑料呈现彩色条纹的 原因,再用不同的单色偏振光以布儒斯特角照射,以此得到形状相同但相互之间存在位移偏差的干涉条纹,最终解释了透明塑料制品上彩 色条纹的产生原因 关键词:双折射;应力;透明塑料制品;偏振 中图分类号:T文献标识石 Study on the Color Stripe of Transparent Plastic Han Yefei No .29School of Nanjing City ,Jiangsu ,210000 ) Abstract :This paper mainly explores the causes of the phenomenon of transparent plastic color stripe in life .In the experiment ,the incident angle of natural light irradiation on transparent plastic products was first adjusted to find Brewster angle ,and the transparent plastic with stress was irradiated with Brewster angle ,and the birefringence was produced .This process is equivalent to the color of the explicit polarization to explain the reason of the transparent plastic rendering of color stripes .Using different monochromatic polarized light to irradiate Brewster angle ,the interference fringe with the same shape but the displacement deviation is obtained .Finally ,the reason of the color stripe on transparent plastic products is explained Key words :birefringence :s...
粉煤灰综合利用 FLYASHCOMPREHENSIVEUTILIZATION2017 NO.6
设计与施工
软土地层盾构隧道施工横断面地表沉降的拟合研究 Fitting Study on the Surface Settlement in Shield Tunnel Construction Cross-sectional in Soft-soil Layer
宁波,王旭东²,李科兴1
(1.陕西铁路工程职业技术学院,陕西渭南714000; 2.同济大学地下建筑与工程系,上海200092) 摘要:基于Peck公式,分析沉降槽宽度系数、轴线地表沉降和埋深的变化关系,并基于软土地层盾构隧道施 工导致横断面地表沉降的实测数据,拟合得到不同测线的沉降槽宽度系数,并与多种经验计算公式对比。
施工技术 2012年2月下 34 CONSTRUCTION TECHNOLOGY 第41卷第359期 跳仓法在广州南站大截面预应力架空 结构中的应用 吴小松 (中国中铁建工集团有限公司深圳分公司,广东深圳518052) [摘要]介绍了跳仓法混凝土施工技术在广州南站超大截面、大跨度、大面积、高架预应力结构中的施工应用.通 过专家组对各施工方案的充分论证,确定采用跳仓法进行施工.首先讲述了跳仓法的工艺原理,结合本工程实例 介绍跳仓法施工中的分仓设计和跳仓顺序,闹述了原材料选择、配合比优化和人模温度控制,指出了混凝土施工要 点及养护措施. [关键词]火车站;混凝土;跳仓法;预应力:架空结构 [中图分类号]TU245 [文献标识码]A [文章编号]1002-8498(2012)04-0034-03 Application of Sequence Method in Large Cross-section Prestressed Overhead Structure in Guangzhou South Railway Station Wu Xiaosong (Shenzhen Branch of China Railway Construction Engineering Group Shenthen Guangdong 518052 China Abstract:Sequence method is applied in the large cross-section big span large area elevated prestressed structure of Guangzhou South Railway Station.After the expert panel sufficient demonstrating for every scheme the sequence method is chosen.The construction process is described and the construction division and sequence are also mentioned.The raw materials choice mix proportion optimization and molding temperature control are put forward.Finally the construction key points and maintenance measures are obtained. Key words:railroad stations;concrete;sequence method;prestressing;overhead structure 混凝土跳仓法是近些年在国内少数工...
工技术 2015年10月上 CONSTRUCTION TECHNOLOGY 第44卷第19期 do:10.7672/sgj2015190024 跳仓施工坑顶支座大梁长度变化实测与理论分析 赵明 (浙江广播电视集团,浙江杭州310005) 摘要]上海世茂深坑酒店坑顶支座大梁采用跳仓法施工,大梁底部设计有无胎卷材防水层。通过对大梁浇筑后 温度和长度变化的测量与计算,分析出无胎卷材防水层在减少垫层对大梁约束中的作用,以及先浇仓段对后浇仓 段的约束影响。经研究得出,在位于坚硬地基上的垫层上面铺设3mm厚无胎卷材防水层后,垫层与上部混凝土结 构之间的摩擦系数μ为0.827。 [关键词]混凝土;跳仓法;梁;约束;摩擦系数 [中图分类号]TU3751 [文献标识码]A 文章编号】1002-8498(2015)19-0024-04 Temperature and Length Measurement and Theoretical Analysis of Support Beam Constructed by Jump Warehouse Method Zhao Ming Zhejiang Radio TV Group ,Hangahou ,Zhejiang 310005 ,China ) Abstract :The support beam of Shanghai Shimao Chasm Hotel is constructed by jump warehouse method and there is PET coil waterproof layer under the beam .By measuring and calculating temperature and length change of the beam ,this paper analyzed the constraint influence of coil waterproof layer in reducing the constraint between cushion and beam .After laying 3mm coil waterproof layer on the cushion covering hard foundation ,the friction coefficient between cushion and concrete structure is 0 .827 Key words :concrete ;jump warehouse method ;beams ;constraint ;friction coefficient 0引言 采用跳仓法施工的混凝土结构,对于单个仓段 温度变化和尺寸变化的研究以及仓段之间相互约 束的研究目前较为少见。...