2017年4月上 施工技术 第46卷第7期 CONSTRUCTION TECHNOLOGY 53 D01:10.7672/sgjs2017070053 钢结构装配式住宅造价分析及降低措施 尹义松,霸虎,韩月涛 (中建钢构有限公司,天津300383) [摘要]针对目前钢结构住宅造价普遍高于传统现浇混凝土结构住宅的现状,从钢构件模块化管理、减少围护结构 和内隔墙工作量、工期、装配式建筑政策扶持等方面,分析降低钢结构装配式建筑造价措施及可行性,为钢结构装 配式建筑真正切人市场提供参考. [关键词]钢结构;装配式;住宅;工业化;造价;模块化 [中图分类号]TU94 [文献标识码]A [文章编号]1002-8498(2017)07-0053-04 Analysis and Reducing Measures of Steel Structure Fabricated House Cost YIN Yisong BA Hu HAN Yuetao China Construction Steel Structure Co.Ltd.Tianjin 300383 China) Abstract:Aiming at the cost of steel assemble housing is generally higher than the current traditional cast-in-situ concrete structure housing steel modular management partition wall retaining structure reduction construction period and policy support and other aspects are summarized to analyze steel structure prefabricated construction cost measures and feasibility providing a way for prefabricated buildings into market popularly. Key words:steel structures;precast;residence;industrialization;cost;modularization 钢结构及预制围护结构具有自重轻、工期短、类似项目的钢结构住宅项目造价对比分析如表1~ 劳动力投入较少、抗震性能好、质量可靠、安全环保4所示. 等一系列优点.钢结构建筑的得房率比传统钢筋 从表中可以看出,70m高度以内、地震烈度7度 混凝土建筑要高6%~10%且空间布置灵活.目 0.15g地区商品房住宅,钢结构装配式住宅结构比 前,钢结构装配式建筑比例不足5%,且钢结构装配 短肢剪力墙造价高出约150元/m2;而70m以上商 式建筑以政府背景的教育建筑、保障房建筑及自行 品房住宅,钢结构装配式住宅比短肢剪力墙造价高 开发的房地产为主,真正进入市场化的钢结构装配 出约400元/m2.考虑到钢结构装配式住宅自重 式建筑基本没有,其主要原因是造价过高.钢结构 轻、地基及基础造价低的优点,钢结构装配式住宅 装配式建筑市场化任重道远. 建筑每m2综合造价还会降低.但钢结构装配式住 1钢结构装配式建筑造价分析 宅综合造价高于传统结构形式住宅,其主要原因为 目前建筑市场以中高层为主,尤其是住宅市 钢材含量高且综合单价高、ALC隔墙条板价格 场.而中高层住宅市场以短肢剪力墙为主.对于 较高....
施工技术 2014年10月下 66 CONSTRUCTION TECHNOLOGY 第43卷第20期 D0I:10.7672/sgjs2014200066 钢结构工程现场负温焊接技术措施 邢海龙,刘健博 (中建一局钢结构工程有限公司,北京100070) [摘要]钢结构现场焊接是施工中的重点、难点之一,冬期负温度下的焊接质量控制更是钢结构施工企业面临的难 题.结合乌鲁木齐某工程实践,提出了负温焊接的质量通病和形成原因,总结了钢结构冬期焊接施工经验以及保 证钢结构负温焊接质量的技术措施. [关键词]钢结构;负温;焊接;技术措施 [中图分类号]TU758.163 [文献标识码]A [文章编号]1002-8498(2014)20-0066-02 Technical Methods for Negative Temperature Welding on Site of Steel Structures Xing Hailong Liu Jianbo China Construction First Division Steel Structure Engineering Co.Lad.Beijing 100070 China) Abstract:Welding on site is the difficulty for steel structures especially the welding under negative temperature.Combining with the practice of an engineering in Urumqi the quality problems and forming reasons of negative welding were put forward.The construction experiences and technical methods assuring welding quality were summarized. Key words:steel structures;negative temperature;welding;technical methods 1工程概况 响.淬硬倾向越大,越易产生裂纹.钢结构中采用 乌鲁木齐市属中温带干旱大陆性气候区,以气的钢材主要有两种:碳素结构和低合金结构钢,常 候干燥,降雨量小,冰冻期长,昼夜温差变化较大,见的钢结构材料中,碳素钢主要为Q235 低合金结 春、秋多风,夏季短促而炎热,冬季漫长且严寒为其构钢主要为Q345 Q390 Q420.低合金钢含有锰、 主要特征.乌鲁木齐新客站站房及雨篷相关工程钒等合金元素而具有较高强度.Q345 Q390 Q420 中,钢结构构件多为30 35 40 50 70mm厚钢板拼的屈服强度比Q235提高将近一半,抗拉强度也提 接、卷制、焊接而成,主构件材质多为Q345C 高不少.但抗拉强度提高时相对降低了塑性和韧 Q345GJC Q420GJC等低合金钢.由于乌鲁木齐新 性,对焊接结构来说增加了转脆倾向.焊接时,近 客站ZF标工程为兰新第二双线工程重要的配套工 缝区的加热温度很高,使奥氏体晶粒发生严重长 程,工期要求紧,为按期完成施工任务,进行冬期焊 大,当快速冷却时,粗大的奥氏体将转变为马氏体. 接施工. 由金属强度理论可知,马氏体是一种脆硬组织,发 2负温焊接的质量通病及其成因分析 生断裂时只消耗较低的能量.因此,焊接接头有马 1)根据以往施工经验,在进行钢结构冬期焊接 氏体存在时,裂纹易于形成...
2010年7月 施工技术 第39卷第7期 CONSTRUCTIONTECHNOLOGY 35 钢结构安装塌事故案例分析及警示 郭正兴,朱张峰,牛萌 (东南大学土木工程学院,江苏南京210096) [摘要】近年来,钢结构在大跨度厂房和大型公共建筑工程的钢屋盖中得到越来越多的应用,施工工期的无节制加 快和钢结构安装施工人员的素质下降,导致了销结构安装工程的坍塌事故增多.介绍几起大跨度钢屋盖安装坍增 事故案例,进行其安全技术分析,总结所得到的警示. [关键调]钢结构安装;工程事故;坍場;方案论证 [中图分类号】TU398.1 [文献标识码】A [文章编号]1002-8498(2010)07-0035-05 Case Analysis and Warning of Installation Collapse Accidents ofSteelStructure Guo Zhengxing Zhu Zhangfeng,Niu Meng (ScholfCiilEngineering SouheasUirsiy Nanjing,Jiangs210096 Chin) Abstract;Steel structure has more and more application for steel roof of long-span workshop and large- scale public building engineering in the recent years. Installation collapse accidents of steel structure increase due to immoderation reduction of construction period and low quality of constructors. Authors introduce several installation collapse accident cases of long-span steel roof conduct the analysis for their safety technology and summarize obtained warnings. Key words;installation of steel structure; engineering accident; collapse; scheme demonstration 随着2010年上海世博会等国家重大社会经济活 dFaulty) 次重大(数合) 动的展开,我国近几年建设了一大批高标准、高规格的 体育场馆、会议展览馆、轨道交通车站、机场航站楼等 大跨度钢结构公共建筑.大跨度空间钢结构施工速度 1 00) Near Miss 1000次隐由 越来越快,相反其施工难度却越来越大.因此,大跨度 Dagmvs Codiis 空间钢结构安装过程中其安全风险也越来越大. Dingercus Actiens Prperty Dmage 1零事故安全文化的理念 危险状况、绝险行为,财产探失 国外非常强调零事故的安全文化理念,即将零事 故作为共同的文化理念,作为共同的奋斗目标.在零 图1工程事故的冰山模型 事故的目标下,注重事故控制,强调安全指令上传下达 Fig.1 Iceberg model of engineering accidents 和加强安全信息及时. 案把关,加强过程控制和关注实施细节. 国外零事故的定义为:预防可能事故,包含重 2钢结构安装坍塌事故类型及原因剖析 大伤亡事故、财产损失、停工、施工局部受限制和进度 2.1钢网格工程安装坍塌事故 延误等. 近年来大大小小的钢网格结构工程事故不断发 国外的安全工程师认为:工程施工的安全事故发 生.由于网格结构多用于公共建筑和工业广房,人员 生规律遵循“工程事故冰山模型”,即一次重大安全事 密集,贵重设备与设施很多,一旦发生重大安全事故, 故,建立在100次的小安全事故之上;100次小安全事 特别是钢网格倒場,将对人民生命和国家财产造成巨 故又建立在1000次安全隐患上(见图1). [收稿日期】2010-05-10 因此,钢结构安装工程要保证施工安全,应全面贯 [作者简介】郭正兴,东南大学土木工程学院教授,博士生导师, 南京市四牌楼2号210096,电话:(025)83790278,E-mail: 彻零事故的安全文化理念,吸取安全事故教训,重视方 guezx195608@ 126. 万方数据
36 施工技术 第39卷 大损失,产生恶劣的社会影响.钢网格工程安装場 施工单位对设计有不同意见或建议时,理应及时 事故的主要原因如下. 会同设计部门协商修改,重视安全施工,避免发生纠 1)施工...
[关键词】航站楼:钢彩带:网壳结构:钢桁架;播摆柱 [中图分类号]TU391[文献标识码】A[文章编号】1002-8498(2011)01-0036-05 ApplicationofSteelStructureinAirportTerminalBuilding Shu Weinong,Zhu Zhongyi (BeijingInstitutefArchiecturalDesign,Bejng100045,China) Abstract;Steel structure engineering of airport building has characters as plex forming, super long structure, plex structure selection, support and joint. Based on practical engineering, roof forming, supporting system of roof,earthquake resistance ability design principle,temperature stress and special joint design of terminal building are introduced. According to different problems, corresponding measures are adopted. Furthermore, effective length factor, nonlinear stability and intermal force transmission of steel ribbon are analyzed. Key words:terminal building; steel ribbon; reticulated shell; steel truss; sway column 航站楼具有柱网较大、高大空间较多、屋顶造型昆明新机场航站楼南北长约850m,东西宽约 较复杂,跨度较大、建筑使用功能要求较高、需要适1120m,总建筑面积约54.83万m²,如图2所示。
【关键词】钢结构;铸钢;建筑设计;结构设计;施工;监测 [中图分类号】TU391;TU973.13【文献标识码]A[文章编号]1002-8498(2012)18-0009-08 TheApplicationofSteelStructureinTianjinCulturalCenter Chen Zhihua (Schoolof Civil Engineering,Tianjin Universty,Tianjin 300072,China) AbstractSt ruture wasaplidtheuseumgallerybrarygrandtheatrandinbintf Tianjin Cultural Center. Among which Yingbin tower adopts cast steel structure system.The conceptual design of these five project was introduced and more attention was paid to the structural design and construction. Some experience for design and construction of special and plicated steel structure was accumulated from the participation in these 5 projects, especially of Yingbin tower, library and grand theater.Theoverallviewof theapplicationofsteelstructureinTianjin CulturalCenter wasshowedinthis paper. Key words;steel structures; cast steel; architectural design; structural design; construction; monitoring 1工程概况阳光乐园大剧院 文化中心位于天津市河西区,规划建设博物图书馆
银河购物中心美术馆博物馆 馆、美术馆、图书馆等文化、休闲设施,通过与景观 轴、中心湖、生态岛等景观设施有机结合,偕同周边自然博物馆 区域已有的天津自然博物馆(天鹅)、中华剧院、科迎宾塔 技馆等建筑,共同形成布局合理、特色鲜明的文化 聚集中心、市民休闲活动中心,成为天津的标志性 区域。
[关键词】钢结构;吊装:定位;施工技术 [中图分类号]TU758.11 [文献标识码]A [文章编号】1002-8498(2012)09-0035-03 InstallationTechnologyofSteelStructureinNational ExecutiveLeadershipAcademy Wang Feng, Li Zuojun (The First Company, China Xinxing Construction Development Corporation, Bejing 100071, China) Abstract;The architecture area of National Executive Leadership Academy is 40 061. 9 square meters. includes steel-skeleton columns, steel truss, steel beams and C type purlines, which is diffieult for hoisting and is short for construction period.Especially it is difficult for steel truss installation in arc core tube and embedded parts’ position. By adopting a series of technical measures, these difficulties are solved successfully , a series of super-limit and super-high members are favorably hoisted on place. Key words;steel structures; hoisting; position; construction 1工程概况 远,超出塔式起重机起重能力和回转半径范围的个 全国组织干部学院工程建筑面积40061.9㎡²,别钢构件,使用汽车式起重机吊装。
施工技术 2016年7月下 138 CONSTRUCTION TECHNOLOGY 第45卷第14期 D0I:10.7672/8js2016140138 钢结构双层压型钢板保温屋面施工技术 施耘,陈旭1,王佳全2 (1.南通建工集团股份有限公司,江苏南通226001; 2.苏州大学金螳螂建筑学院,江苏苏州215123) [摘要]上海大众汽车有限公司宁波分公司CP6工程项目总装车间,屋面采用的是一种新型节能型双层压型钢板 保温屋面,这种钢结构屋面具有节点安装形式复杂、安装工序繁多、操作难度较大等特点.针对性介绍了双层压型 钢板保温屋面的构造、施工顺序、主要材料性能、安装机具、安装工艺、细部节点的安装方法、注意事项及安装操作 时应采取的相应措施,并对复杂形式节点的安装顺序及方法进行研究.结果表明,工程质量符合国家规范规定. [关键词]钢结构;屋面;双层压型钢板屋面;细部节点;安装 [中图分类号]TU761.1*2:TU391 [文献标识码]A[文章编号]1002-8498(2016)14-0138-04 Construction Technology of Double Deck Steel Plate Heat Insulation Roof Shi Yun' Chen Xu' Wang Jiaquan2 (1.Nantong Construction Group Co.Lad.Nantong Jiangsu 226001 China; 2.Gold Mantis School of Architecture Soochow University Suzhou Jiangsu 215123 China) Abstract:For assembly workshop of Ningbo Branch of Shanghai Volkswagen Co.Ltd.CP6 project the roof is a new type of energy saving type double pressure type steel roof the steel structure roof has the node installation form the installation process is more difficult and so on.In this paper the construction construction sequence main material properties installation tools installation process method of plex type of nodes considerations and the measures taken during installation operation are introduced.Meanwhile the installation sequence and method of plex form nodes are studied.The results show that the engineering quality is in accordance with the national standard. Key words:steel structures;roofs double deck steel roofs:detail nodes:installation 双层压型钢板组合型节能保温屋面具有刚度1工程...
施工技术 2017年9月下 4 CONSTRUCTION TECHNOLOGY 第46卷第18期 D01:10.7672/js2017180004 钢结构住宅轻钢龙骨复合墙板体系施工技术 张劲帆,余佳亮,陈韬,罗琴丽,张耀林 (中建钢构有限公司,广东深圳518040) [摘要]基于泰州绿色农居建筑集成系统示范项目,结合秸秆板轻钢龙骨复合墙板的研发,探讨了轻钢结构住宅预 制装配式施工的特点.根据分厂内预制加工及现场装配式施工2个阶段,总结了本项目预制装配式施工全过程的 工艺及施工流程.预制装配式施工具有质量易于保证和现场工期短等特点,有效地减少现场湿作业从而改善施工 现场环境,直接及间接经济效益明显.秸秆板轻钢龙骨复合墙板外侧覆盖导热系数较低的秸秆板材,降低了外墙 的传热系数,从而提高房屋的保温性能以降低建筑能耗,且纯天然秸秆板材,原材料来自于废弃稻草的回收循环利 用,经济效益和社会效益显著. [关键词]钢结构;装配式;轻钢龙骨;复合墙体:泡沫混凝土:节能 [中图分类号]TU741 [文献标识码]A[文章编号]1002-8498(2017)18-0004-04 Construction Technology of Light-gauge Steel Joist Composite Walls System in Steel Structure House ZHANG Jinfan YU Jialiang CHEN Tao LUO Qinli ZHANG Yaolin (China Construction Steel Structure Co.Lid.Shenzhen Guangdong 518040 China) Abstract:Based on the construction of Taizhou green rural house along with the research of straw board covered cold formed steel framed posite slab the advantages of prefabricated construction technique are discussed.Parted into two stages including off site prefabricated construction and on site reassemble construction the prefabricated construction technique and its whole process are concluded.The prefabricated construction technique can secure the building quality and greatly shorten the construction period moreover the on-site pouring concrete process is minimized and the construction environment is improved which contributes direct and indirect economic benefit remarkably.The cold formed steel framed posite slab is covered by the straw board with small heat co...
2013年6月上 施工技术 第42卷第11期 CONSTRUCTION TECHNOLOGY 27 D01:10.7672/sgjs2013110027 钢管负公差和初弯曲对脚手架受压 钢管稳定性影响分析* 张鹏程,曹平周,伍凯 (河海大学土水与交通学院,江苏南京210098) [摘要]脚手架的钢管按国家标准允许存在公差和初弯曲.为了研究负公差和初弯曲对脚手架构件稳定承载力的 影响,采用我国现行规范《钢管脚手架安全技术规范》JGJ130一2011中的计算方法,计算得到负公差会造成构件轴 压承载力下降10.24%~12.59%,负公差和初弯曲共同作用时承载力下降12.17%-15.28%.为了减小负公差和 初弯曲对脚手架立杆承载力的不利影响,建议提高脚手架钢管精度,使得外径负公差限值为0.3mm 壁厚负公差限 值为5%t 初弯曲限值为1%ol [关键词]脚手架;钢管;负公差;初弯曲;稳定性 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2013)11-0027-04 Analysis to the Impact of Negative Tolerances and Out-of-straightness of Steel Pipes on the Stability of Scaffold Zhang Pengcheng Cao Pingzhou Wu Kai College of Civil and Transportation Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:The steel pipes of scaffold are allowed to have certain tolerances and initial out-of-straightness according to national standards.In order to study the influence of negative tolerances and initial out-of- straightness on the stability of scaffold members this paper uses the method proposed in Technological specification for the safety of steel pipe scaffold JGJ130-2011.The calculation shows that co-existing negative tolerances of out diameter and pipe thickness reduce the axial bearing capacity by 10.24%~ 12.59%.Combination of negative tolerances and initial out-of-straightness reduces the carrying capacity by 12.17%~15.28%.To abate the adverse influence it is suggested that the fabrication accuracy of scaffold pipes should be improved and the tolerances for out diameter tube th...
施工技术 2013年1月上 32 CONSTRUCTION TECHNOLOGY 第42卷第1期 钢管脚手架兼作地下室筏板钢筋支撑架 及循环降温管的施工应用 张静,李文波 (成都建筑工程集团总公司,四川成都610031) [摘要]针对传统地下室筏板大体积混凝土施工的特点,以实际工程为例,阐述了利用钢管脚手架兼做地下室筏板 钢筋支撑架及循环降温管的可行性、需要解决的问题及实施效果等内容,并与常规的施工方法进行了对比.工程 实践表明,使用该方法不仅降低了施工成本,而且能确保施工安全及施工质量. [关键词]钢管脚手架;大体积混凝土;支撑架;降温管;施工技术 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2013)01-0032-03 Application of Steel Pipe Scaffold Used as Support Frame and Cycle Cooling Pipe Zhang Jing Li Wenbo (Chengdu Construction Engineering Group Co. Chengdu Sichuan 610031 China) Abstract:According to characteristics of mass concrete construction in traditional basement raft based on engineering practice this paper expounds the feasibility problems and effect of steel pipe scaffold used as support frame and cycle cooling pipe pares this method with mon methods.Engineering practice shows that this technology can reduce the cost and ensure the safety and quality of construction. Key words:steel pipe scaffolds;mass concrete;support frame;cooling pipe;construction 布鲁明顿广场工程为“第2批全国建筑业绿色分筏板基础尺寸分别为:64.8m×31.2m 64.9m× 施工示范工程”,为在保证质量、安全等要求的前提31.2m 40.3m×37.4m.地下室基础平面布置如图 下,通过科学管理和技术进步,实现节约资源和环1所示. 境保护的目的,对地下室筏板的施工工艺进行研 64900 究,利用钢管脚手架的特点,使其身兼两种功能,既 抗水与 视板分界线 板厚 作筏板钢筋支撑,又作循环降温管,使钢筋支撑架 m 执水板与 民本与 及循环降温管合二为一,本文就该施工方法在上述 整根分界线 工程中的应用情况作如下分析和总结. 柳厚 1工程概况 本工程位于成都市高新区锦辉西一路,建筑面 积为167795.9m2 建筑高度为108.7m.地下3层, 地上部分为2栋24层办公楼、1栋28层住宅楼及 温度后浇带,宽度为800 相应连廊、裙楼,结构形式为全现浇钢筋混凝土框 ■沉降后浇带,宽度为800 架剪力墙结构,地基为密实卵石层和中风化泥岩, 图1地下室基础平面布置 高层部分采用钢筋混凝土筏板基础,地下车库及多 Fig.1 Layout of basement f...
2016年8月下 施工技术 第45卷第16期 CONSTRUCTION TECHNOLOGY 57 D0I:10.7672/8js2016160057 钢管桩托换技术在既有建筑地下室改造中的应用 王海涛,张渊源,安禹蔚,李齐林,张巨振,杨森 (中建一局集团公司承包公司,北京100161) [摘要]某建翼险造施工中,在不拆除原有上部结构前提下,将原有无地下室部位扩建为地下室.地基基础施工期 间,采用钢管对原有验立基础进行支撑并增加新混凝土承台与原独立基础紧密结含浇筑成为一个整体,从替 换原有独立基础承我,达到钢管托换承台的的.总结了本工程钢管托换承台成功的施工经验,对托换承台 在既有建地下室加团改造中施工方法及施工艺进行了较为梨统的介. [关键询]加固;增层;段造;钢管柱;托病承台;基础;监测 [中图分类号]TU746.3[文献标识码]A[文章编号]1002-8498(2016)16-0057-04 Application of Steel Pipe Pile Underpinning Technique in an Existing Building Basement Renovation Wang Haitao Zhang Yuanyuan An Yushi Li Qilin Zhang Juzhen Yang Sen General Contracting Company China Construction First Engineering Division Co.Lid.Beijing 100161 China) Abstract:In the construction of a building renovation the original site without basement needs to be expanded as basement under the premise of no removal of the existing upper structure.During foundation construction steel pipe pile foundation was used to support the existing independent foundation and adding new conerete pile caps were poured into a whole with the original independent foundation closely to replace the original independent foundation bearing which reaches steel pipe pile underpinning the caps.This paper summarized successful experience of the steel pipe pile underpinning caps introduced systematically construction method of underpinning cap used in retrofitting construction of the existing buildings basement. Key words:strengthening;adding layers;retrofitting;steel pipe piles;underpinning cap; found...
[关键词]桩基础;钢管桩;斜桩;自平衡法;静载试验 [中图分类号】TU753.6【文献标识码】A [文章编号]1002-8498(2014)01-0023-03 Self-balance Static Loading Experiment of Inclined Steel-pipe Pile Huo Shaolei,Zhu Xiaojun,Gong Weiming (School of Civil Engineering,Southeast Unitersity,Nanjing,Jiangsu 210096,China) Abstract;Based on the characteristics of the pedestrian bridge in the Nanjing Jiajiang Yangtze River, to adapt to water scouring hydrologic conditions on the midstream and downstream, inclined steel-pipe pile is determined to be the foundation form and piling barge is adopted to hammer the pile to acplish the foundation construction of this pedestrian bridge.Inclined steel-pipe pile is rarely used in the current domestic, pared with ordinary steel pipe piles, its construction and testing is more dificult. Self- balance method is used for the first time in China to determine the bearing capacity of the two inclined stel-pipe piles. The tests indicate that one of the two inclined steel-pipe piles’bearing capacity is not enough, so piling barge is used to hammer the pile, then the self-balance static loading experiment is used at the second time, the test results show that the bearing capacity meets the design requirements. Key words:piles; steel-pipe pile; inclined pile; self-balance method; static loading experiment 0引言 究,张明远、赵冉等[*基于有限元软件对大直径钢. 大直径钢管桩因其整体性能好、承载能力强、管桩的竖向承载特性进行了数值模拟,然而国内外 沉桩工艺简便等优点,从20世纪末至今,大量学者文献对于钢管斜桩的研究较少,本文基于南京长江 对其进行了深人的研究。
2014年3月上 施工技术 第43卷第5期 CONSTRUCTION TECHNOLOGY 73 D0I:10.7672/5js2014050073 钢管扣件式独立高支模架抗倾覆计算方法研究 王永泉,郭正兴2,田正宏 (1.河海大学水利水电学院,江苏南京210098;2.东南大学土木工程学院,江苏南京210096) [摘要]钢管扣件式高支模架在土木工程领域应用面广量大,造成重大伤亡的坍塌事故也屡见不鲜.结合《混凝土 结构工程施工规范》GB50666一2011中钢管扣件式高支模架抗倾覆的相关规定,参考钢管扣件式脚手架抗倾覆性 能的计算方法,考虑高支模架顶部的水平荷载作用效应、支模架顶部的水平位移、支架的垂直搭设偏差等,提出了 钢管扣件式独立高支模架的整体抗倾覆性能计算方法. [关键词]模板;脚手架;钢管扣件式脚手架;高支模架;抗倾覆;位移 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2014)05-0073-04 Research on the Calculation Method of Independent Steel Fasteners Type High-supported Formwork Against Overturning Wang Yongquan' Guo Zhengxing? Tian Zhenghong' (1.College of Water Consercancy and Hydropower Engineering Hohai Unirersity Nanjing Jiangsu 210098 China; 2.College of Ciril Engineering Southeast University Nanjing Jiangsu 210096 China) Abstract:The steel fasteners type high-supported formwork has been widely utilized in the field of civil engineering resulting in heavy casualties of the collapse of the accident is also not unmon.According to the relevant provisions of the anti-overturning listed in Chinese specification Code for construction of concrete structure GB50666-2011 the anti-overturning performance of steel fasteners type high- supported formwork was been well studied referring to the calculation method of steel fasteners scaffolding against overturning the effect of the horizontal load and displacement on the top of the high-supported formwork was considered and also the vertical erection deviation.At last the calculation method ...
2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY 81 D0I:10.7672/5j52015040081 钢筋隔离技术在钻孔灌注桩桩头处理上的应用 郑先奇,宋中锋 (中铁十六局集团第三工程有限公司,浙江湖州313000) [摘要]结合京沪高速铁路三标荆河特大桥钻孔灌注桩桩头处理施工实例,介绍钢筋隔离技术在钻孔灌注桩桩头 处理上的应用.在桩头竖向钢筋、钢筋笼的吊筋和声测管上预先安装橡塑发泡管、硬质塑料管,将桩头竖向钢筋、 钢筋笼的吊筋和声测管与钻孔桩混凝土进行隔离.在进行桩头处理时,采用人工在设计桩顶周围垂直钻孔打人钢 楔子或用液压膨胀劈裂机将桩头上部多余的混凝土整体膨胀劈裂分离,用起重设备将桩头整体起吊分离. [关键词]桩基础;钻孔灌注桩;桩头;处理;钢筋隔离;膨胀劈裂;整体起吊分离 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2015)04-0081-04 Application of Steel Bars Isolation Technology in the Treatment of Bored Piles Head Zheng Xianqi Song Zhongfeng (The 3rd Engineering Co. Lid.China Railcay 16th Bureau Group Huzhou Zhejiang 313000 China) Abstract:The application of steel bars isolation technology in bored piles head treatment is introduced bining with Jing River bridge bored pile head treatment of Beijing-Shanghai high-speed railway.Foam rubber tube and hard plastic tube are preinstalled in the pile head vertical steel bar reinforcement cage hanger steel bars and acoustic pipe in order to isolate them.During the treatment of pile head personnel vertically drill steel wedges into pile top or use splitting machine with hydraulic expansion for isolating the extra concrete upper pile head or separating pile head overall by lifting with hoisting equipment. Key words:piles;bored piles;pile head;treatment;steel bars isolation expansion and splitting;overall separation by lifting 1工程概况 于各类土木工程.钻孔灌注桩在水下混凝土灌注 京沪高速铁路三标荆河特大桥位于山东省滕 过程中,桩顶是较厚的浮浆和泥浆沉淀物.钻孔桩 州市境内,桥梁全长11.445km 孔跨布置20m×24m 水下混凝土灌注,必须超灌到设计桩长以外...
施工技术 2014年2月上 4 CONSTRUCTION TECHNOLOGY 第43卷第3期 D0I:10.7672/sgjs2014030004 钢筋锚固板设计与应用* 李智斌,邵康节,张涛,赵杰,冯大斌,赵基达 (中国建筑科学研究院建筑结构研究所,北京100013) [摘要]钢筋锚固板由于其锚固性能良好,可有效减少错固用钢材,缓解钢筋拥挤,加快钢筋工程施工速度,提高混 凝土浇筑质量,为特殊工况的钢筋锚固问题提供新方法,受到工程界的广泛欢迎.行业标准《钢筋铺固板应用技术 规程》JG256一2011已于2012年4月开始实施,为使广大工程技术人员更好地理解、掌握和运用这一全新的钢筋 机械锚固技术,深人研究了钢筋锚固板设计应用过程中的关键构造和技术问题,完善了我国钢筋机械铺固技术和 工程应用体系,为在混凝土工程广泛应用钢筋错固板技术提供指导. [关键词]钢筋工程;钢筋锚固板;设计;应用 [中图分类号]TU375.04 [文献标识码]A [文章编号]1002-8498(2014)03-0004-06 Design and Application of Headed Bars Li Zhibin Shao Kangjie Zhang Tao Zhao Jie Feng Dabin Zhao Jida Institute of Building Structures China Academy of Building Research Beijing 100013 China) Abstract:Headed bar has good anchor performance which can save steel for rebar anchorage reduce congestion faster rebar installation speed improve the reinforced concrete quality greater design flexibility and is accepted by engineers and bee very popular.The industry standard Technical specification for application of headed bars JGJ256-2011 is put into execution from April of 2012.In order to help the designer and constructor to understand master and apply this new rebar mechanical anchor technology the key structure and technical points in the headed bars design and application process are studied in this research which improve the rebar mechanical anchoring technology and engineering application system in our country and provide guidance for widely application of headed bar in the concrete project. Key words:reinforcement;headed bars;...
2012年11月上 施工技术 第41卷第376期 CONSTRUCTION TECHNOLOGY 97 钢筋网灌浆料加固技术在建筑楼板加固中的应用 周茗如,杨根深 (兰州理工大学土木工程学院,甘肃兰州730050) [摘要]结合实际加固工程,比较各种常用楼板加固方案,从加固层厚度、灌浆料选择、压力灌浆施工新方法、新旧 结合层问题和钢筋锚固等方面探讨了钢筋网灌浆料加固技术.并简要阐述了施工工艺及注意事项.结果表明, 采用该法加固可使端部锚固更牢固,且施工便捷,能充分发挥钢筋网的强度,加固后楼板满足现行规范要求. [关键调]加固;楼板;钢筋网;灌浆料;植筋;灌浆 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2012)21-0097-03 Application of Steel Bar and Mesh-grouting Materials in Building Slab Strengthening Zhou Mingru Yang Genshen Civil Engineering Institute Lanzhou University of Technology Lanzhou Gansu 730050 China) Abstract:Based on several mon strengthening methods steel bar and mesh-grouting materials for strengthening building slabs is discussed from the reinforcement layer thickness grouting material selection pressure grouting method the problems of new and old construction and reinforced anchorage according to practical reinforcement projects.Construction process and construction attentions are introduced briefly.Reinforcement effect proves that the convenient reinforcing method can make end anchor more firm and can realize the strength of steel mesh. Key words:strengthening;slabs;steel mesh;grouting materials;planting-bar;grouting 1工程概况 严格,对提高板的厚度没有太大帮助,且采用的黏 某6层砖混结构,现浇楼板,混凝土设计强度等结胶为有机材料,存在耐久性、耐高温性及防火性 级为C25 板厚100mm.该建筑冬期施工阶段经历 问题,不适合加固该结构;高强钢绞线网聚合物砂 了大雪天气,因对雪防护遮盖不足,在楼板支护模 浆复合面层加固技术具有高强、防火、聚合力强、无 板内部尚存积雪时直接浇注混凝土,模板拆除后发 污染等特点,聚合物能增高板厚,但存在预应力 现板底表面出现大量蜂窝麻面,且未采取措施补 筋松弛导致预应力加固效果随时间增长而降低的 强.后现场勘测发现,该楼板的上表面没有裂缝, 问题,且聚合物砂浆需要分层抹压,由于楼板加固 但在楼板的底部出现了大量裂缝,并出现了混凝...
施工技术 2016年5月下 52 CONSTRUCTION TECHNOLOGY 第45卷第10期 D0I:10.7672/8js2016100052 钢筋直螺纹连接端头精准批量切割 设备系统的研发与应用 冯弥,石东浪,李小勇 (陕西建工第五建设集团有限公司,陕西西安710032) [摘要]目前施工现场钢筋直螺纹连接端头切割设备落后,通过分解研究钢筋端头加工工艺,将钢筋吊运、端头对 齐、锯切、传输、丝头加工等工艺动作合理集成布局至加工设备系统平台范围内,研发出钢筋直螺纹连接端头精准 批量切割成套设备系统,相比传统方式,大大消除了由于钢筋机械连接的质量问题导致的工程结构安全隐患,同时 使得钢筋直螺纹连接端头加工操作简便、安全、环保、经济社会效益显著提高. [关键词]钢筋工程;连接端头;加工;移动车间 [中图分类号]TU755.3*3 [文献标识码]A[文章编号]1002-8498(2016)10-0052-04 Research and Application of Current Straight Threaded Rebar Joint Cutting Equipment Feng Mi Shi Donglang Li Xiaoyong (SCEGC No.5 Construction Engineering Group Co.Lad.Xi'an Shaanxi 710032 China) Abstract:Due to the backwardness of the current straight threaded rebar joint cutting equipment a plete system of precise cutting equipment for straight threaded rebar joint is developed by integrating into the processing equipment system platform such procedures as rebar lifting joint alignment cutting transport and thread processing etc.In parison with the traditional ways it has greatly eliminated the engineering structural safety hazard that caused by quality defects on rebar mechanical connection. Meanwhile it has inereased the benefits sufficiently in aspects of easy operation safety environment protection economy and society. Key words:reinforcement;joints;processing;mobile workshop 0引言 1现状问题调查分析 钢筋等强度滚轧直螺纹连接技术在我国工程1.1钢筋切头现状 建设中广泛应用,钢筋接头作为产品有其特殊性, 目前钢筋切割设备主要采用钢筋切断机和砂 除连接套筒在工厂生产外,钢筋丝头大都在施工现 轮切割机,切断机切断钢筋截断面易被挤压变形; 场加工,钢筋接头的质量控制在很大程度上依赖于 砂轮切割机下料,由于高速摩擦导致钢筋端头温度 施工现场接头的加工和...
[关键词]钢筋焊接网;疲劳S-N曲线;热轧带肋钢筋(HRB400);高延性冷轧带肋钢筋(CRB600H);试验;研究 [中图分类号]TU711 [文献标识码]A[文章编号]1002-8498(2017)04-0071-04 ExperimentalResearch onFatigueS-N Curves ofWeldedFabric Gu Wanli, Zhu Aiping (China Academy of Building Research,Beijing 100013,China) Abstract:Fatigue test results of welded fabrics made of hot rolled ribbed bars (HRB400) and cold rolled ribbed bars with improved elongation (CRB600H) are introduced. Producing fatigue specimens, test conditions,failure features of specimens and expression of fatigue S-N curves etc are specified.By using a probability of95%,and analysisand pare two slopes,KandK,indiferent equations.When we set horizontal cut-offlines for S-N curves and N=2 ×10°cycles,corresponding stress ranges are not lower than 100MPa. By using V=10” cycles as a demarcation point, S-N curves are 2-segment polylines with two slopes,KandK,respctively.Afterparing fatigue curvesof twokindsofwelded fabricstested in this time with a fatigue curve of welded fabric made of CRB550 tested more than10 years ago, take safety into consideration,the fatigue curve equation of welded fabric made ofCRB550may replace the others.Experimentalresultsare alsothemainbasisforpreparationof fatigueprovisionsofspecification for welded fabric,JGJ114-2014. Key words:welded fabric; fatigue S-N curve; hot rolled ribbed bar (HRB400); cold rolled ribbed bar with improved elongation(CRB600H);testing;research 0引言 范[46]中作出规定。
2016年5月下 施工技术 第45卷第10期 CONSTRUCTION TECHNOLOGY 45 D0I:10.7672/8js2016100045 钢筋桁架楼承板倾斜承载研究与应用 姚刚1,许程丞,徐士杰,冯锋2,江磊2,陈治2 (1.重庆大学土木工程学院,重庆400045;2.中建钢构有限公司,重庆400045) [摘要]钢筋桁架楼承板已在许多工程领域得以应用,以工程为例论述钢筋桁架楼承板受力特性,对其倾斜状态下 的承载进行力学分析.研究表明:在混凝土硬化前的施工阶段,结构的强度、刚度全部来源于钢筋桁架,楼板质量 不会使板底混凝土产生拉应力:桁架楼承板在楼面活荷载以及永久荷载作用下,比普通混凝土板变形、开裂的时间 明显延迟;随着钢筋桁架板倾斜角度的增加,其施工阶段的适用跨度减小,必要时可增加上弦、下弦、腹杆筋的直径 以达到提高其适用跨度的目的.通过贵阳花果园倾斜钢筋桁架楼承板施工实例,验证了对其受力分析的可靠性. [关键词]钢筋桁架;倾斜;受力;跨度:施工 [中图分类号]TU323.4 [文献标识码]A [文章编号]1002-8498(2016)10-0045-04 Bearing Research and Application on Sloping Steel Bar Truss Deck Yao Gang' Xu Chengcheng' Xu Shijie' Feng Feng2 Jiang Lei Chen Zhi (1.School of Ciril Engineering Chongging University Chongging 400045 China; 2.China Construction Steel Structure Co.Ltd.Chongging 400045 China) Abstract:Steel bar truss deck is widely applied in many fields now.This paper summarizes the advantages of the steel bar truss deck and analyzes its mechanical characteristics based on engineering examples.Research shows that:When construction stage without temporary support the strength and rigidity of the floor is the same as the steel bar truss floor of gravity doesn't make the bottom concrete tensile stress before the concrete became hard.The deformation and cracking time of steel truss floor boards under permanent load and floor live loads was significantly delayed than ordinary concrete.With the increase of steel bar truss plate angle the span of its construction phase is reduced.We can increase the diameter of rein...
2013年7月下 施工技术 第42卷第14期 CONSTRUCTION TECHNOLOGY 113 D0I:10.7672/sgjs2013140113 钢筋套筒灌浆连接施工质量控制措施 秦珩,钱冠龙2 (1.北京万科企业有限公司,北京100125;2.北京建茂建筑设备有限公司,北京100088) [摘要]钢筋套筒灌浆连接是装配式混凝土结构建筑受力钢筋的重要连接方法,通过对该连接施工工艺和材料特 点的分析,阐明了影响连接质量的关键因素:预制阶段为灌浆连接接头性能和套筒质量、钢筋和套筒的定位精度 等,安装阶段为灌浆部位密封质量、灌浆作业工艺和构件保护措施等.提出了一套较完整的保证施工质量的技术 措施.工程实践表明,该措施施工效果良好. [关键词]钢筋;连接;套筒;灌浆;质量控制 [中图分类号]TU755.6 [文献标识码]A [文章编号]1002-8498(2013)14-0113-04 The Construction Quality Control Measures of Coupler Grouting Splice for Reinforcement Qin Heng' Qian Guanlong' (1.Beijing Vanke Co.Ltd.Beijing 100125 China: 2.Beijing Jianmao Construction Equipment Co.Ltd.Beijing 100088 China) Abstract:The coupler grouting splice for reinforcement is an important splicing method of bearing load reinforcement in precast reinforced concrete structure.By analysis on the features of construction techniques and splicing material the factors of influencing construction quality is emphasized.In prefabrication stage they are the performance of grouting splice ending and coupler quality location precision of reinforcement and coupler and so on.In installation stage they are the sealing quality of grouting parts grouting technique and ponents protection measures and so on.A series of technique measures for ensuring the construction quality of grouting splice are advanced.The project practice shows that the technique measures are effective and successful. Key words:reinforcement;splice;coupler;grouting;quality control 1钢筋套筒灌浆连接 灌浆方法连接的接头.而一端采用螺纹连接,另一 1.1接头组...