2016年1月下 施工技术 第45卷第2期 CONSTRUCTION TECHNOLOGY 65 D0I:10.7672/sgj2016020065 菱形空间曲面大网格钢结构施工技术 段文付1,杨大勇2 (1.武汉光谷建设投资有限公司,湖北武汉430205;2.湖北省工业建筑集团有限公司,湖北武汉430064) [摘要]光谷国际网球中心5000座网球馆外围钢网格采用双向斜交的菱形空间曲面大网格钢结构,具有结构复 杂、加工安装难度大、要求精度高等特点.结合项目实际,介绍了双向斜交的菱形空间曲面大网格钢结构制作安装 控制要点,并通过有效的施工过程监测,准确高效地完成了钢结构安装任务. [关键词]钢结构;空间结构;网格;吊装;施工技术 [中图分类号]TU758.1[文献标识码]A [文章编号]1002-8498(2016)02-0065-03 Construction of the Large Space Curved Surface Forming Rhombic Grid Steel Structure Duan Wenfu' Yang Dayong2 (1.Wuhan Optical Valley Construction Investment Co.Ltd.Wuhan Hubei 430205 China; 2.Hubei Industrial Construction Group Co.Ltd.Wuhan Hubei 430064 China) Abstract:The 5 000 seats tennis stadium of Optics Valley International Tennis Center (OVITC)adopts large spatial obliquely intersected steel structure forming a space curved exterior surface with rhombic grid which features a tremendous plexities and difficulties in structural arrangement high requirements for manufacturing and site erection.With on-site project experience this article highlights the major controlling and monitoring aspects for the successful construction of the obliquely intersected rhombic steel grid of the OVITC stadium. Key words:steel structures;space structure;grid;hoists;construction 1工程概况 件在工厂加工,共计约6500个杆件,然后在现场进 光谷国际网球中心5000座网球馆外围钢网格 行单元拼装,采用“大型履带式起重机场外分片吊 采用双向斜交的菱形空间曲面大网格钢结构,采用 装、汽车式起重机单元拼装及散件补装”的安装方 三角形钢管双向布置主肋,逆时针布置次肋.钢结 案进行安装.单元拼装只能在网球馆的室外2层平 构顶高度最高达17.000m 场内最大悬挑约为 台,每个单元约重16t 在地面通过250t履带式起重 6.8m 外围钢网格顶口直径为82.6m 分别在平台 机...
施工技术 2011年7月下 52 CONSTRUCTION TECHNOLOGY 第40卷第345期 节能结构一体化产业化住宅研究 王长虹1,杨兴富2 (1.上海应用技术学院轨道交通学院,上海200235;2.上海建工集团,上海200050) [摘要]为缓解资源环境紧张,住宅建筑能耗大的突出矛盾,积极响应时代发展的需要,坚持走节能结构一体化住 宅建设的道路,努力提高产业化住宅的经济性;对比日本和中国香港等地区产业化节能住宅建设的成功经验,深化 节能结构一体化住宅建设成套技术体系的研究,为产业化节能住宅的推广提供参考. [关词]节能;预制装配式;产业化住宅 [中图分类号]TU973.12 [文献标识码]A [文章编号]1002-8498(2011)14-0052-04 Research on Industrial Houses of Energy-saving and Structural Integration Wang Changhong' Yang Xingfu (1.School of Railseay Transportation Shanghai Institute of Technology Shanghai 200235 China; 2.Shanghai Construction Group Shanghai 200050 China) Abstract:In order to relieve the contradiction of nervous resources and environment and large energy consumption of residential building engineers should respond to the requirement of development and insist on industrial houses of energy-saving and structural integration as well as improve economy of industrial houses.Comparing with successful construction experiences of energy-saving industrial houses in Japan and Hong Kong in China set of technology system for construction of industrial houses of energy-saving and structural integration are researched to provide reference for the promotion of energy- saving industrial houses. Key words:energy-saving;precast;industrial bouse 当前,我国经济社会发展与资源环境的矛盾日化住宅建设道路,降低产业化住宅的建造成本,提高 益突出,严重制约社会可持续发展.我国已进入全 市场经济竞争力. 面建设“资源节约型,环境友好型”小康社会的新阶 在过去几年中,上海组织多家大型建筑施工企 段,城镇化进程明显加快,城镇住宅建设任务繁重. 业充分发挥集团优势,综合建筑设计、构件加工、结 由于经济增长方式粗放,导致能源供求矛盾更 构施工整条产业链上的力量,深入探索节能结构一 加突出:建筑能耗(包括建造能耗、...
施工技术 2016年6月上 102 CONSTRUCTION TECHNOLOGY 第45卷第11期 D0I:10.7672/8js2016110102 良态风作用下索膜结构风压特性现场实测研究* 李兆杨1,杨彬,张其林,钱基宏2 (1.同济大学土木工程学院,上海200092;2.中国建筑科学研究院,北京100013) [摘要]采用超声风速仪和风压传感器对良态风下的上海世博会世博轴索膜结构的风场及风压进行现场实测,对 结构所处风场特性及膜结构表面风压特性进行研究.研究结果表明:三方向脉动风速均基本符合高斯分布;湍流 度及阵风因子与平均风速基本符合对数型函数关系,随着平均风速的增大而减小;湍流积分尺度随平均风速的增 大而增大;实测风速谱低频段和中频段实测谱与Simiu谱较为接近;风压概率密度分布有一定的非高斯性;与顺风 向脉动风速功率谱相比,各测点脉动风压低频段功率谱密度相近,中频、高频段功率谱密度有一定差别;随着平均 风速的增大,风压系数的离散性逐渐减小,风速较小时风压系数偏大;得到352.4°风向角下风压系数与体型系数. [关键词]索网结构;现场实测;良态风;风场;风压特性 [中图分类号]TU399 [文献标识码]A [文章编号]1002-8498(2016)11-0102-06 Field Measurement Research on Wind Pressure Characteristics of a Cable-membrane Structure During Normal Wind Li Zhaoyang' Yang Bin' Zhang Qilin' Qian Jihong (1.College of Civil Engineering Tongii University Shanghai 200092 China; 2.China Academy of Building Research Beijing 100013 China) Abstract:Filed measurement of wind field and wind pressure of Expo Axis cable-membrane structure in Shanghai World Expo during normal wind was carried out by using ultrasonic anemometers and air pressure sensors.The wind characteristics around the structure and wind pressure characteristics on the surfaces of membrane structure were analyzed.It is shown that the probability density distribution of fluctuating wind follows a Gaussian distribution;turbulence intensity and gust factor follow a logarithmic relationship with mean wind speed and they decrease with the increase of mean wind speed;turbulence integral scale increases with the increase of mean wi...
[关键词]影胀土;支护;桩;旋喷搅拌加劲桩;监测;数值模拟 [中图分类号】TU443[文献标识码】A[文章编号]1002-8498(2017)01-0039-04 SafetyAnalysisof theStiffeningPileSupportinginExpansiveSoil Wang Mengxiang,Zhou Shengquan,Zong Qi (School of Civiland Architectural Engineering,Anhui Unisersity of Science & Technology,Huainan,Anhui 232001,China) Abstract:Based on the features of expanded soil in Huainan, in the case of a large deep foundation pile anchor was applied in the deep foundation excavation for the first time. In the main road near the foundation excavation, through these points of horizontal displacement and subsidence monitoring data analysis and processing, the result is used to analyze the stability of the foundation excavation supporting facilities of the building and its surrounding safety. The numerical simulation results and the measured results are consistent,that is to further demonstrates the validity of the research and analysis. Application in the engineering practice and analysis research prove the supporting technology that SMW pile with singleshaft rotaryjetmixing inclined pile anchorbined support technologyfeasibility and superiority of deep foundation excavation supporting in the region. Key words;expansive soil; supports; piles; mixing anchor pile; monitoring; simulations 0引言2)膨胀土具有很强的亲水性,钻孔扰动解除了 安徽淮南地区有着广泛的膨胀土",膨胀土是膨胀土膨胀力的约束,导致孔壁产生裂缝,吸水后, 一种吸水膨胀软化、失水收缩干裂的特殊土。
2011年1月 施工技术 第40卷第2期 CONSTRUCTION TECHNOLOGY 69 膨胀密封胶及全断面注浆管在地下 工程中的应用 贡浩平,李雄威2,钱红萍2 (1.常州市城多建设局,江苏常州213000:2.常州工学院土木建工程学院,江苏常州213002) [描要]对常州客运中心预留地铁房工程中施工缝的施工处理港施进种研究,介细了所链用的膨陈密刺胶和全 断面注菜管防水技术.工程完成后发现局部存在水现象,对洛水原因进行分析.同时指出对于多而地豆,地面 工环境的项目,以及工单位缺相应工管理经验的工程,应对实际工况调整途工方,设计中也可以 考感采用膨陈密封胶和止水钢板相传合的方法. [关键词]地下工程:施工健:膨旅密封腔:全断面注聚管:防术 [中图分类每]TU443 [立献标识福]A [支章编号]1002-8498(2011)02-0069-03 Application of Expansive Sealant and Full Face Injection Pipe in Underground Engineering Gong Haoping' Li Xiongwei Qian Hongping? (1.Urban and Rural Construction Bureau of Changzhou Changzhou Jiangsu 213000 China: 2.School of Civil Engineering Architecture Changzhou Institute of Technology Changzhou Jiangsu 213002 China) Abstract:The processing measures of construction joint are studied in underground engineering of Changzhou Passenger Center.The technology of expansive sealant and full face injection pipe are introdueed.When construction is pleted it is found that there are leakages in part of the joint and the causes are analyzed.The results show that the waterproof construction plan should be adjusted in the engineering such as high-rainfall area plicated subaerial construction environment and construction organizations which are inexperienced.It suggests that sealing steel doors bined with expansive sealant could be considered in design. Key words:underground engineering:construction joint:expansive sealant:full face injection pipe: waterproof 施工缝是结构面防水的薄弱环节,结构后浇带 本交主要针对膨密封胶及全断面注浆管在常 施工缝的...
施工技术 2016年10月上 70 CONSTRUCTION TECHNOLOGY 第45卷第19期 D0I:10.7672/5j52016190070 膨胀土锚索止浆塞施工工艺现场试验研究 马一霁1,王武刚2,姚智全2,左怀西2 (1.云南精诚更善拆除工程有限责任公司,云南昆明650000; 2.中国建筑科学研究院地基基础研究所,北京100013) [摘要]利用具有高膨胀率的膨胀土作为原材料,发明出一种膨胀土错索止浆塞.该止浆塞放置在锚索自由段和 错固段交界处和错索一起放入错孔中.通过现场试验得到注浆压力、注浆量和返浆/漏浆量之间的关系.结果表 明,水泥浆的注浆量得到了保证,错索承载力也得到了提高. [关键词]基坑:膨胀土;铺索:止浆塞;施工工艺;试验 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2016)19-0070-03 Experimental Study of Anchor Stopper Plug Construction Technique in Expansive Soil MaYj' Wang Wugang㎡,Yao Zhiquan2 Zuo Huaixi2 (1.Yunnan Sincere More Good Demolition Engineering Co.Lad.Kunming Yunnan 650000 China; 2.Institute of Foundation Engineering China Academy of Building Research Beijing 100013 China) Abstract:Using expansive soil as material the authors invent a stopper plug.The stopper plug was set with the anchor cable.According to the test the relationship of grouting pressure quantity and slurry quantity was obtained.The results show that the grouting quantity was ensured and anchor cable bearing capacity was improved. Key words:foundation excavation;expansive soil;anchor cable;stopper plug;construction;tests 0引言 发明出一种膨胀土错索止浆塞.这种膨胀土锚索 随着城市建设步伐的加快,基坑工程的发展愈止浆塞的特点就是充分发挥膨胀土遇水产生高膨 发迅速,同时也涌现了许多问题,如对深基坑采用 胀率的特点,将止浆塞放置在错索自由段和错固段 排桩错杆的支护形式时,预应力错索在设计和施 交界处,结合错索的成孔直径,将制作成的膨胀土 工中通常分成自由段和锚固段,错杆和土体之间的 锚索止浆塞和锚索缠绕在一起放人锚孔中,通过设 承载力是保证支护结构安全的先决条件,在一些软 置不同的注浆压力来获得注浆压力、注浆量和返 土地区及黏土和粉土分布较广的地区,由于一次注 浆/漏浆量之间的关系以检验膨胀土止浆塞的止浆 浆之后锚索的承载力较低,无法满足设计要求,为 效果,并在错索养护期后对其进行承载力极限抗拔 了提高错杆的承载力,往往采用二次或多次高压注 试验,以检验增加膨胀土锚索止浆塞后的...
施工技术 2017年7月上 110 CONSTRUCTION TECHNOLOGY 第46卷第13期 D0I:10.7672/8js2017130110 膨润土防水毯在深基坑工程中的应用 王瑾 (上海市基础工程集团有限公司,上海200002) [摘要]膨润土防水毯(GCL)作为一种新型土工合成材料,主要用于环境工程中的废弃物填埋场、地下水库、地下 基础设施建设等工程中,以解决密封、隔离、防渗等问题,防水效果好,抗破坏性强.结合深基坑工程实例,从结构 底板防水材料比选,施工技术、质量控制几个方面对覆膜钠基膨润土防水毯在基坑工程中的应用进行分析总结. [关键词]基坑;防水;软土地区;膨润土防水毯:施工技术;质量控制 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2017)13-0110-03 Application of Geosynthetic Clay Liner in Deep Foundation Excavation WANG Jin Shanghai Foundation Engineering Group Co.Lid.Shanghai 200002 China) Abstract:Geosynthetic clay liner GCL)as a new type of geosynthetic materials was mainly used for waste landfill site in environmental engineering and underground reservoir underground infrastructure construction projects in order to solve the problems of seal isolation seepage control its effect is good and has strong destructive.Based on deep foundation excavation engineering from the structure floor waterproof material alternatives construction technology quality control the effect of sodium base bentonite waterproof blanket application in the foundation excavation engineering was analyzed and summarized. Key words:foundation excavation;waterproof;soft soil;geosynthetic clay liner(GCL);construction; quality control 0引言 1工程概况 深基坑工程中,防水工程是一门涉及面广、实 北横通道是上海市内环内三横三纵“井”字形 用性强的工程.但在深基坑施工过程中却很容易通道的一部分,也是上海骨架性主干路网的重要组 被忽视,尤其是在大底板施工阶段,既要快速形成 成部分.采用地面、地下及少量高架的组合形式, 大底板,确保基坑稳定,又要兼顾好防水施工,避免 全长约19.1km. 后期结构渗漏.目前,建筑市场上的防水材料种类 北横通道新建工程I标中山公园工作井作为主 繁多,质量也参差不齐,不同的防水材料也对应了 线盾构过站井,位于长宁区中山公园内湖心...
2010年5月 施工技术 第39卷第5期 CONSTRUCTION TECHNOLOGY 膜结构技术研究和应用进展 张其林 (同济大学土木工程学院,上海200092) [滴要]介绍了近年来国内所开展的膜结构技术的研究内容和进展,包括各类膜结构材料性能的研究、膜结构计算 和设计方法的研究、膜结构体系的研究以及膜结构安全性监测系统的研究等,同时介绍了这些研究成果在实际工 程中的应用进展,提出了需要进一步研究的相关问题. [关键词]膜结构;材料性能;计算方法;安全检测 [中图分类号]TU38 [文献标识码]A [文章编号]1002-8498(2010)05-0001-05 Research and Application Progress on Membrane Structure Techniques Zhang Qilin College of Civil Engineering Tongji Unisersity Shanghai 200092 China) Abstract:In this paper the research progress on the membrane structure techniques in China in recent years is introduced including the mechanics properties of different kinds of membrane material the putation and design methods for membrane structures the structural systems and the safety monitoring system on membrane structures.The applications of the research results on real engineering projeets of membrane structures are also illustrated.Finally some problems which need to be further investigated are presented. Key words:membrane structure mechanics property putation method;safety monitoring 0前言 膜结构在国内的应用晚于国外近50年,但近十几 年来,膜结构在国内的应用发展速度高于世界任何地 区.目前,膜结构已广泛应用子大型体育场馆、展览中 心、航空和铁路交通、文化娱乐等公共建筑中,雕塑、小 依经验制作的构小品 依境外提术建成的大型体育涵服屋面 品等小型临时建筑也在公共绿地和公园中极为普及. 广泛的工程实践也在不断地推动膜结构技术的研 图120世纪90年代建成的国内早期膜结构 Fig.1 Membrane structures bullt in 1990s in China 究和应用.图1a所示的上海中央绿地膜结构是20世纪 90年代初的早期小品,依靠裁缝师傅的经验制作完成; 图1b所示的20世纪90年代中期建成的上海八万人体 育场膜屋面是国内最早采用PTFE膜材建成的大型膜结 构建筑,完全依靠境外技术.图2所示的上海世博会世 博轴膜屋面是现今规模尺度最大的膜建筑,主要依靠国 内研究成果和技术建造.这三个工程充分反应了十几 图2上海世博会世博轴结构 年以来国内膜结构技术的研究和应用情况....
施工技术 2010年3月 34 CONSTRUCTION TECHNOLOGY 第39卷第3期 脚手架的倾覆与稳定计算 施炳华 (中国建筑科学研究院,北京100013) [摘要】当模板支架、施工用操作架等脚手架不设连墙杆时,必须首先对脚手架进行抗倾覆验算,然后才是强度、刚 度和稳定性计算.而现行的国家标准中没有倾覆验算和稳定性验算内容.根据国家有关标准导出了脚手架倾覆 验算公式,并有2个算例辅以说明.最后指出脚手架高宽比与脚手架的倾覆有关,与脚手架稳定性承载能力无关. [关键词]脚手架;倾覆;稳定性;验算 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2010)03-0034-03 Calculation on Overturn and Stable of Scaffolding Shi Binghua China Academy of Building Research Beijing 100013 China) Abstract:When some scaffoldings of formwork support and construction handling frame have no connect wall bars it must firstly check to calculate overturn of scaffolding and then calculate strength rigid and stable.But the present national standards and codes have no related checking calculation contents on overturn and stable of scaffolding.In this article the author derives overturn calculation formula on scaffolding on the basis of these standards and provides two examples.The author also discusses that width of scaffolding is related to overturn of seaffolding and unrelated to stable of scaffolding. Key words:scaffolding:overturn;stability;checking calculation 结构设计中,“倾覆”与“稳定”这两个含义是不相墙杆,则脚手架的倾覆验算在这两本规范中就成为不 同的,设计时都应考虑.《建筑结构可靠度设计统一标可缺少的内容了.所以,对于模板支架、施工用的操作 准》GB50068-2001第3.0.2条第一款规定承载能力极架等无连墙杆的脚手架,首先应保证脚手架不倾覆而 限状态包括:“①整个结构或结构的一部分作为刚体失进行倾覆验算,然后才是强度、刚度和稳定性计算.如 去平衡(如倾覆等).④结构或结构构件丧失稳果需要,还可进行正常使用极限状态计算. 定(如压屈等)”.可见它们同属于承载能力极限状1脚手架的倾覆验算 态,但应分别考虑.《建筑结构设计术语和符号标准》1.1通用的验算公式推导 GB/T50083-97 对“倾覆”和“稳定”分别作出了定义, 无连墙杆的脚手架,作为一个刚体应按如下表达 并称“倾覆验算”和“稳定计算”.《建筑地基基础设计 式进行倾...
2016年12月下施工技术 第45卷第24期CONSTRUCTION TECHNOLOGY101 DOI:10. 7672/sgjs2016240101
脚手架、支架工程安全的设计计算和施工管理要点(5)
杜荣军 (北京中建建筑科学技术研究院,北京100076) [中图分类号]TU731.2[文献标识码]A[文章编号〕1002-8498(2016)24-0101-12 Key Points of Design Calculation and Construction Management of Scaffolding and Supports(5) Du Rongjun (Bejing Building Research Institute Co.,Ltd.of CSCEC,Beijing 100076,China) 6一般的设计和荷载计算规定6.1.4扣件和托、底座的承载力 6.1一般设计规定扣件和托、底座的承载力设计值可按表12采 6.1.1钢材性能用。
当对产品的状况与使用安全有疑问时应送检, 钢材的设计值和物理性能应按表9采用。
并确定其中可使用者的承载力许用值。
6.1.2轴心受压钢管的长细比表11受弯杆构件的容许浇度[w] 轴心受压钢管的长细比不宜大于表10所示容Table 11The permissible[w]of flexural members 许值。
杆件类别脚手架支架
表9钢材的强度设计值和物理性能直接承载的纵、横向1/150,且≤10mm1/250,且≤6mm Table 9 The strength design values and水平杆,脚手板 physical properties of steel挑梁和悬挑(空)架构1/300,且≤5mm
中的受弯杆件 钢材强度设计值/(Nmm-2)弹性模量注:1为受弯杆件跨度 抗拉、抗压和抗弯抗剪E/(N-mm²²)表12扣件和底托座的承载力设计值 Q2352051202.06 ×10Table12The design value of bearing capacity of Q345300175fastener and bottom bracket 剪变模量线膨胀系数质量密度项目承载力设计值/kN C/(Nmm²2)α(以1℃计)p/(kgm-) 0.79 × 1012×1067 850对接扣件抗拉3.2
直角扣件抗滑单扣件0'8 表10受压杆件的容许长细比[A]双扣件12.0( =2 ×6.0) Table 10The permissible slenderness ratio[A]旋转扣件抗拉8.0 杆件类别容许长细比[A]固定托、底座抗压40.0 立杆脚手架200(180)6.1.5荷载及其他使用限制 横杆支撑架190(170)产品、节点和杆构配件的额定或许用荷载及其 斜杆倾斜结构的受压斜杆180 剪刀撑斜杆其他情况250他使用限制的确定应符合以下要求。
2015年9月下 施工技术 第44卷第18期 CONSTRUCTION TECHNOLOGY 23 D0I:10.7672/5js2015180023 胶粉复合改性沥青最佳制备工艺 及其溶胀时间试验研究 肖鹏,蔡冬艳,徐亚 (扬州大学建筑科学与工程学院,江苏扬州225127) [摘要]针对目前胶粉改性沥青性能存在的不足,以金陵70号道路石油沥青、中胶40目胶粉、YH-791SBS以及维 他连接剂TOR作为原材料,确定最佳制各工艺,研发胶粉复合改性沥青.主要探究胶粉与SBS两种改性剂的添加 工艺以及溶胀时间对胶粉复合改性沥青性能的影响.试验研究表明:胶粉与SBS同时掺人道路石油沥青,且溶胀 时间为I时,制备的胶粉复合改性沥青路用性能最佳,其高温稳定性能和弹性恢复性能较TOR橡胶沥青和SBS改 性沥青有显著改善. [关键词]建筑材料;沥青;胶粉;制备工艺;溶胀时间 [中图分类号]U416.217 [文献标识码]A [文章编号]1002-8498(2015)18-0023-04 The Best Preparation and Swelling Time Study of the Powder Composite Modified Asphalt Xiao Peng Cai Dongyan Xu Ya College of Ciril Science and Engineering Yangzhou University Yangzhou Jiangsu 225127 China) Abstract:Aiming at the shortage of the rubber asphalt this study selected No.70 Jinling road asphalt Zhongjiao 40 mesh powder YH-791 SBS and VITA linking agent TOR as raw material to determine the best preparation process and develop the powder posite modified asphalt.This article mainly explores the influence of the powder and SBS's adding process and swelling time on the powder posite modified asphalt performance.Experimental research shows that:when the powder is added together with SBS into the road asphalt and the swelling time is one hour the powder posite modified asphalt has the best performance.Its high temperature stability and elastic recovery performance is better than TOR rubber asphalt and SBS modified asphalt significantly. Key words:building materials;asphalt;rubber powders;preparation;swelling time 随着国内外研究的深入,废轮胎...
施工技术 2017年8月下 40 CONSTRUCTION TECHNOLOGY 第46卷第16期 D0I:10.7672/8js2017160040 聚苯乙烯模块墙体空腔简易模块化装 配式建筑应用 苏云辉,陈宁 (新疆建筑科学研究院有限责任公司,新疆乌鲁木齐830054) [摘要]根据新疆地区的气候条件和实际情况,通过模拟计算、现场检测、实地调研、理论分析等手段,对聚苯乙烯 模块墙体空腔简易模块化装配式建筑的安全性、节能性、保温性及经济性等开展研究,结合实际案例分析对比实际 效果,探讨聚苯乙烯模块墙体空腔简易模块化装配式建筑在新疆巴州富民安居房和农村住房建设中的应用前景. [关键词]装配式;聚苯乙烯空腔模块;安全性;保温:节能;经济性 [中图分类号]TU331.3 [文献标识码]A [文章编号]1002-8498(2017)16-0040-04 Application of Hollow Modular Precast Building with EPS Block Wall SU Yunhui CHEN Ning Xinjiang Research Institute of Building Sciences LLC.Urumgi Xinjiang 830054 China) Abstract:Based on climate and practice condition by simulation calculation on-site detection and investigation and theory analysis the research on safety energy-saving insulation and economic of the hollow modular precast building with EPS block wall are studied.Comparing the case analysis and practice effect application prospect of this building in Xinjiang Bazhou affordable housing and village housing is discussed. Key words:precast;EPS hollow modular;safety;insulation;energy saving;economic 0引言 1技术原理和连接方式 为提高新疆地区村镇房屋的节能标准及抗震1.1技术原理 能力,有效杜绝工程质量缺陷,规范村镇房屋的建 将EPS空腔模块经积木式错缝插接拼装成空 造行为为背景,开展了聚苯乙烯墙体空腔简易模块 腔模块墙体,在其内设置钢筋、浇筑混凝土,内外表 化装配式建筑的应用和研究,将工厂标准化生产的 面用纤维抗裂砂浆抹面层防护、耐碱玻璃纤维网格 简易装配式EPS墙体空腔模块与传统的房屋结构 布抗裂增强,形成保温承重一体化的房屋围护结 有机结合,形成聚苯乙烯模块混凝土剪力墙结构体 构,如图1所示. 系,实现保温与模板一体化以及保温与结构一体 化,做到简易装配式模块保温层与房屋结构同寿 模块外侧壁 模块内侧壁 命,从而取代传统的房屋建造黏土砖、块状组砌以 及彩钢板材料.结合实际案例,从聚苯乙烯模块墙 混凝土墙体 一抹面层 体空腔简易模块化装配式建筑的抗震性能、保温防 火性能、经济性和节能性等方面进行研究分析,验 芯肋(连接桥) 证聚苯乙烯模块墙体空腔简易模块化装配式建筑 在我区富民安居...
2015年2月上 施工技术 第44卷第3期 CONSTRUCTION TECHNOLOGY 85 D0I:10.7672/5js2015030085 聚合物超细粉体制备及改性砂浆性能研究* 邓小勇,丁凯2,王燕娜,王斌1 (1.解放军理工大学野战工程学院,江苏南京210007;2.总装工程兵科研一所,江苏无锡214035) [摘要]为开发一种新型的聚合物改性混凝土外料,配制高性能混凝土,利用在化工领域发展很活跃的超临界流 体制备超微粉体技术(其中的RESS法)制备出聚丙烯超细粉体.通过对比试验初步掌握了聚丙烯超细粉体对水 泥砂浆的改性规律,并采用微观技术分析了不同外掺料的改性机理.结果表明:聚丙烯超细粉体能体现有机聚合 物材料与无机矿物超细粉体的部分性能,可以明显改善水泥砂浆的微观结构,提高水泥基体的致密性,增强水泥砂 浆的抗折强度. [关键词]建筑材料:砂浆;聚合物超细粉体;改性 [中图分类号]TU57 [文献标识码]A [文章编号]1002-8498(2015)03-0085-04 Preparation of the Polymer Superfine Powder and Research on Modifying the Performance of Mortar Deng Xiaoyong' Ding Kai Wang Yanna' Wang Bin' (1.College of Field Engineering PLA Unirersity of Science Technology Nanjing Jiangsu 210007 China; 2.The First Engineers Scientific Research Institute of General Armaments Department Wuxi Jiangsu 214035 China) Abstract:To develop a new type of polymer modifying concrete admixture and prepare high performance concrete polypropylene superfine powder is produced by the use of the manufacture technology of superfine powder by supercritical fluid with the RESS method which develops very actively in the chemical field.By means of parative tests the law of mortar modified by polypropylene superfine powder is preliminarily grasped and the modification mechanisms of different admixtures on the mortar are analyzed with microscopic technology.The results show that polypropylene superfine powder can refleet part of the performances of the polymer material and the active mineral joined material it can imp...
施工技术 2013年1月下 86 CONSTRUCTION TECHNOLOGY 第42卷第2期 聚丙烯纤维对水泥灰土稳定砂力学性能的影响 刘恒,李锐铎 (河南城建学院交通工程系,河南平顶山467036) [摘要]针对水泥灰土稳定砂基层容易出现裂缝的现状,在水泥灰土稳定砂中入一定量的聚丙烯纤维,进行了有 关试验研究.试验表明:与未掺加的相比,掺入聚丙烯纤维对水泥灰土稳定砂的力学性能指标有极大改善.结合 实际工程,铺筑了试验路段,并对试验路段进行跟踪观测和评价分析,取得了较好的使用效果. [关键词]公路工程;水泥灰土稳定砂;聚丙烯纤维;力学性能;抗冲刷性能 [中图分类号]TU528.58 [文献标识码]A [文章编号]1002-8498(2013)02-0086-03 The Influence of Polypropylene Fiber on the Mechanical Property of Cement Lime-soil Stabilized Sand Liu Heng Li Ruiduo The Faculty of Traffic Engineering He'nan University of Urban Construction Pingdingshan He'nan 467036 China) Abstract:Cement lime-soil stabilized sand is prone to cracks.According to this situation this paper carried a series of laboratory experiments to study the effect of adding polypropylene fiber to the cement lime-soil stabilized sand.The results show that the mechanical properties of cement lime-soil stabilized sand were significantly improved with added polypropylene fiber.Combined with a practical project a pilot testing road was paved and its performance was monitored and evaluated.The testing gave a satisfying result. Key words:road construction;cement lime-soil stabilized sand;polypropylene fiber;mechanical properties;anti-erosion performance 0引言 关的技术指标:黄色,最大干密度1.88g/cm3 液限 水泥灰土稳定砂基层在我国一些地区应用广 30.0% 塑限18.2%,塑性指数11.8. 泛,该基层材料具有强度高、稳定性与板体性好的 2)砂 优点,同时也有利于就地取材.不足之处是容易出 根据本试验当地的具体情况,决定使用淮河的 现反射裂缝而造成路面早期破坏. 河砂,并对试验所用的河砂进行筛分,有关的筛分 聚丙烯纤维弹性模量低的特点使得其掺人有 数据如表1所示. 关混合料时,其中的纤维能起到加筋的效果,从而 表1砂的筛分结果 大大提高相关混合料的力学性能.本文针对聚丙 Table 1 Sc...
2017年6月上 施工技术 第46卷第11期 CONSTRUCTION TECHNOLOGY 135 D0I:10.7672/5j52017110135 联想总部(北京)园区项目二期投标方案基坑 支护优化设计分析 罗力勤 (中铁建设集团有限公司,北京100040) [摘要]以联想总部(北京)园区项目二期投标方案为例,从安全性、适用性、经济性的角度,对比分析了两种基坑支 护设计方案.其中,优化设计方案采用土钉墙结合桩锚的支护形式.优化后的方案,在保证安全性、适用性的前提 下,降低了基坑支护的造价. [关键词]基坑;支护;优化设计;桩错支护;土钉墙 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2017)11-0135-03 Optimal Design Analysis of Foundation Excavation Supporting for the Second Phase Bidding Scheme of Lenovo Headquarters(Beijing)Park Project LUO Liqin China Railway Construction Group Co.Ltd.Beijing 100040 China) Abstract:Based on the second phase bidding scheme of Lenovo Headquarters(Beijing)Park project the safety applicability and economy of two support design schemes of foundation excavation are pared and analyzed where optimal design scheme is using the support form of soil nail wall bined with pile anchor.The optimal design reduces support cost of foundation excavation which ensures safety and applicability. Key words:foundation excavation supports optimal design;pile-anchor support;soil nail wall 1工程实例 层埋深如图1所示. 1.1工程概况 46 ①杂填 联想总部(北京)园区项目二期场地位于北京 44 ②黏粉砂粉 市海淀区中关村软件园二期.拟建项目为地上3~ 6层,地下整体1~2层、局部3层的框架剪力墙结 42 ②粉黏黏粉 40.56 构,局部为纯地下室.板底标高-12.050m(局部 40 ③粉粉 -16.050m) 地表标高平均-0.600m.基坑开挖深 38 ③粉黏黏粉 度按11.45m考虑. 36 1.2地质条件 34 ③粉新粉 1)场地现状地形与地貌、地物概况地形总体 基本平坦.目前拟建场区为空地,大部分范围有 堆土. 32 ⑥细砂中砂 29.24 2)地质条件基坑开挖范围内以素填土、粉质 08 黏土、黏质粉土、砂质粉土、重粉质黏土为主,各土 26 [作者简介]罗力勤.高级工程师,E-mal:luoliqin@js cn 图1本项目典型地质剖面 [收稿日期]0场敌;[修订日期]2017-03-16 Fig.1 Typical geological section for ...
[关键词]岩体;裂隙岩体;参数折减;初始地应力场;反演 [中图分类号】TU91:[文献标识码】A[文章编号】1002-8498(2014)13-0080-04 BackAnalysisofInitial GeostressFieldConsideringParameters Reduction ofFracturedRockMess Chen Zhichao',XuYing² (1.Fujian Key Laboratory of Geohazard Prevention,Fuzhou,Fujian 350002,China; 2.Faculty of Engineering,China University of Geosciences,Wuhan,Hubei 430074,China) Abstract;The big error in fractured rock mess modeling and numerical calculation is due to the lots of plicated structural planes. Based on crack granite in underground cavem,the density,radius and others of fractures are considered to reduce the strength of fractured rock parameters in this paper.The training sample P,T are collected based on the reduced parameters mentioned above used in 3DEC.The relationship between initial ground stress field and boundary condition are obtained by BP neural network, and the value of in-situ stress field are obtained based on the measured stress values. The calculation values and the measured values are analyzed paratively. The results show that the parameter optimization method has the high accuracy in back analysis of initial ground stress field in 3DEC. In addition the huge workload and error are reduced in modeling, and it's reasonable be used widely in similar projects. Key words;rock;cracked rock; parameters reduction; initial earth stress field;back analysis 0引言 力场反演中的人工神经网络计算中,刘仲秋则将 初始地应力场对于地下洞室这类永久性地下ABAQUS运用到地应力场模型建设中"。
2015年8月上 施工技术 第44卷第15期 CONSTRUCTION TECHNOLOGY 97 D0I:10.7672/8js2015150097 考虑空间结构随机特征并基于重要性系数 的传感器优化布置方法* 屈兴涛1,丛茂林2 (1.远洋国际建设有限公司,北京100020:2.中国建筑科学研究院建筑结构研究所,北京100013) [摘要]目前的结构传感器优化布置方法主要以模态分析理论为基础,对重要构件损伤的直接监测考虑不足.以 结构的易损性理论为基础,研究空间结构的不同小损伤工况对整体结构的影响,根据广义等效刚度的概念计算各 杆件的重要性系数,以确定易损路径和重要杆件.在同时考虑实际空间结构参数随机性和荷载随机性的情况下, 建立大量随机样本并计算各样本相对应的最易损路径,统计最易损路径上的重要杆件,从而确定传感器布设 位置.将该方法拓展到随机振动分析中,对于每一动力时程,通过选取适当的计算间隔,提取动力过程中结构的时 变响应,从而获得空间结构的动力过程中的重要杆件及动力传感器布置方案.通过算例验证了该传感器布置方法 能有效监测空间结构在实际工况中的薄弱环节,及时识别结构的重要损伤. [关键词]空间结构;易损性;重要性系数;传感器;优化布置 [中图分类号]TU311.3:TU317.1 [文献标识码]A[文章编号]1002-8498(2015)15-0097-05 Optimal Sensor Placement for Space Structure Considering Randomness Based on Important Factors Qu Xingtao' Cong Maolin2 (1.Ocean Construction International Corporation Beijing 100020 China; 2.Institute of Building Structures China Academy of Building Research Beijing 100013 China) Abstract:The current methods of optimal sensor placement are major presented based on modal analysis theory with less consideration about the monitoring of the damage of ponents.The effect of different minor damage cases on the total space structure is studied based on vulnerability theory in structural analysis.The important factor of ponents is calculating according to the concept of generalized equivalent stiffness to sort out fragile ponents.For numerical simulation the random character both for structural parameters and loads is considered and the random samples are established.The fragility failure p...
[关键词]公路工程;季节冻土;路基;相变;冻融;稳定性 [中图分类号]U451.2 [文献标识码】A [文章编号]1002-8498(2013)17-0093-04 Study on Frozen-thaw Stability of Subgrade in Seasonal Frozen Soil with Phase Changing Huo Xiaolong, Chen Shougen,Wei Miaomiao,Xiao Xun (MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University,Chengdu,Sichuan 610031,China) Abstract: Considering the phase-changes and influence of the global temperature rising and using the FLAC3D software of the finite difference method, this paper studies on the subgrade stability of seasonal frozen-thaw section of the second line in new Lanzhou-Urumqi Railway.Through establishing the subgrade model,selecting the suitable simulation parameters,the boundary condition,the initial condition,the methods for dealing with phase transitions and calculation,the numerical analysis of subgrade temperature field and deformation field with phase changing was carried out.Calculated result shows that phase change has a great impact on the subgrade temperature field.When frost heave occurs in the subgrade whose height is 4.2m, the relative deformation of road surface is small, and the relative deformation of road shoulder is large.There islarge heave deformation about 1mfrom the toe of roadbed, and the stability of the roadbed is affected greatly. 1工程概况 高、东北低,区内位于山丹军马场。