施工技术 2017年7月下 108 CONSTRUCTION TECHNOLOGY 第46卷第14期 D0I:10.7672/5j52017140108 高墩大跨连续刚构叠箱渡槽充水试验与建模分析 张玉民 (中铁十二局集团第二工程有限公司,山西太原030032) [摘要]针对山区长距离输水面临的水头、地形、地质条件的制约,黔中水利枢纽徐家湾渡槽采用了高墩大跨度连 续刚构设计,其最大墩高达92m 最大单跨达180m 均位居世界前列,为验证其安全合理性,进行了充水试验箱梁竖 向位移监测与建模分析.数值模拟计算结果与现场实际监测数据对比结果表明:模拟数值解与监测数据符合良 好,从而验证了本文叠箱渡槽结构静力分析模型的正确性,其建模方法可供类似连续刚构渡槽数值模拟参考,为完 善渡槽研究积累了资料. [关键词]渡槽;试验;监测;位移;有限元分析 [中图分类号]TV672*.3 [文献标识码]A [文章编号]1002-8498(2017)14-0108-04 Filling Test and Modeling Analysis of a Continuous Rigid Frame Folded Box Aqueduct with High Pier and Large Span ZHANG Yumin The Second Engineering Co.Lid.of the Twelfth Bureau Group of China Railway Taiyuan Shanxi 030032 China) Abstract:High pier and long span continuous rigid frame aqueduct was used in Xujiawan of Qianzhong hydro-junction project to acmodate water head topography and geological conditions in long distance water diversion project in mountainous area with the highest pier of 92m and the largest single span of 180m all over the world.Filling test and modeling analysis were conducted to check the safety of the aqueduct.Comparing numerical simulation results and the actual monitoring data of box girder vertical displacement under filling the results show that the numerical solution is in good agreement with monitoring data confirming the static model of the folded aqueduct and the modeling method can be used for reference in the similar numerical simulation of continuous rigid-framed aqueduct accumulate data for the research of perfecti...
2012年6月下 施工技术 第41卷第367期 CONSTRUCTION TECHNOLOGY 57 高填方渠道膨胀土(岩)换填技术 张振华,朱云飞 (武警水电第二总队五支队,江苏常州213031) [摘要]南水北调中线一期工程某标段渠道工程膨胀土(岩)段占明渠总长的52.7%,集道基础土质不稳定,无法 直接进行混凝土衬砌施工.通过工程实际和地质分析,确定采用非膨胀土换填技术进行处理,并详细介绍了非影 胀土土料试验、换填施工流程和施工工序.结果表明,该施上工艺有效提高了渠道基础的稳定性,施工工期,成本 得到有效控制. [关键词]果道;高填方;换填祛;膨胀土;稳定性 [中图分类号]TU472.2:TV554 [文献标识码]A[文章编号]1002-8498(2012)120057-03 Replacing and Filling Technology of Expansive Soil(Rock)for High Filled Channel Zhang Zhenhua Zhu Yunfei No.5 Detachment No.2 Hydropower Faree of Armed Police Changahou Jiangsu 213031.China) Abstract:The soil of channel foundation is unstable and concrete lining construction ean't be done directly because more than half length of open channel i话expensive soil(rock)in channel project of South-to-north Water Diversion.Based on the engineering practice and geological analysis the replacing and filling technology with non-expansive soil is adopted and the non-expansive soil testing replacing and filling process and progress are introduced in detail.The results show that this method can improve the stability of channel foundation ensure the construction time and reduce construction cost. Key words channelling;high filled;replacing and filling method;expensive soil;stability 1工程概况 时兼顾其他宏观物理特征和指标,分为弱、中、强膨 南水北调中线一期工程某标段位于华北平原胀土3种.主要划分依据:自由膨胀率>90%为具 西部边缘与太行山麓交接部位,穿行于山前丘陵地 有强膨胀潜势;自由膨胀率60%~90%为中等膨胀 带,主要地貌单元有丘前冲(坡)洪积斜地亚类、软 潜势;自由膨胀率40%~65%为弱膨胀潜势;自由 岩丘陵亚类和山前冲洪积裙亚类3大类.该标段明 膨胀率<40%为不具强膨胀潜势. 渠总长13.077km 其中渠道膨胀土(岩)段 因膨胀土(岩)具有干燥收缩、吸水膨胀和强度 6.893km 占明渠总长的52...
施工技术 2012年7月上 90 CONSTRUCTION TECHNOLOGY 第41卷第368期 高地应力千枚岩地层隧道大变形控制措施探讨 宋嘉辉 (中铁第一指察设计院集团有限公司,陕西西安710043) [摘要]根据兰渝线两水隧道施工中出观大变形的工程实例,对其高地应力地层岩性、变形规律、支护破坏特征、变 形原因进行了分析.根据现场科研试验段控制措施调整情况及现场控制效果,总结了该类地层中隧道大变形控制 技术措施.结合现场变形监测数据结果,探讨了千枚岩,炭质千枚岩地层大变形的发展规律. [关键词]随道工程:千枚岩:高地应力:变形规律:监测:控制措施 【中图分类号]TU452;U459.1[文献标识码]A[文章编号]1002-8498(2012)13-0090-03 Discussion on Large Deformation Controls for Tunnels in High Geo-stress Phyllite Stratum Song Jiahui China Railssay First Survey and Design Institute Group Lad.Xi'an Shaanxi 710043 China) Abstract:Large deformations were observed during the construction of Liangshui Tunnel in Lanyu Railway.With respect to this case this paper analyzed the characteristics of high geo-stress stratum lithology deformation behaviour and failure characteristics of supports.On-site tests were performed to control the deformation and based on the test results large deformation control measures were proposed for similar geological conditions.With the site monitoring data principles governing the large deformation behavior of phyllite stratum were also addressed. Key words:tunnels:phyllite;high geo-stress;deformation;monitoring;control measures 兰渝铁路兰州一广元段地质条件极其复杂,其状岩层被节理切割成碎块状,岩体极破碎,稳定性 中志留系中上统千枚岩、炭质千枚岩是兰渝线典型差.隧道洞身部位的最大水平主应力值与该处单 的软岩、极软岩地层,且处在复杂高地应力区,隧道轴抗压强度比R/0为0.3~3.1,根据《工程岩体 施工开挖过程中极易发生严重的大变形,导致支护分级标准》GB50218一94的规定,属于极高地应力 系统破坏,甚至会发生塌方,严重影响隧道施工安状态,两水进口及斜井工区洞轴向与最大水平主应 全及进度,加大施工成本.本文结合兰渝线两水隧力夹角62°,极易产生大变形. 道的大变形工程实例,探讨千枚岩、炭质千枚岩地2隧道施工变形情况 层大变形的原因、发展规律及变形机理,以期探求 2.1施工...
2014年4月上 施工技术 第43卷第7期 CONSTRUCTION TECHNOLOGY 53 D0I:10.7672/sgj82014070053 高位临边大型塔式起重机基础设计与施工 杜福祥,徐凯,袁渊,方道伟,廖鸿 (中建三局建设工程股份有限公司成都分公司,四川成都610041) [摘要]结合重庆某工程塔式起重机的受力情况及周边环境条件,塔式起重机基础采用三桩承台基础.介绍了塔 式起重机基础的设计情况,并从土方开挖、钢筋工程、模板工程、混凝土工程、防水处理以及施工中的注意事项等方 面详细介绍了该工程高位临边塔式起重机基础的施工技术. [关键词]高层建筑;基础;塔式起重机;承台;设计;施工 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2014)07-0053-04 Design and Construction of Large Tower Crane Foundation in Upper Limb Region Du Fuxiang Xu Kai;Yuan Yuan Fang Daowei Liao Hong (Chengdu Branch of China Construction Third Engineering Bureau Co.Ltd.Chengdu Sichuan 610041 China) Abstract:Based on the actual situation of tower crane in some project in Chongqing three piles cap foundation was adopted for tower crane foundation.This paper introduced the design of tower crane foundation and mainly introduced the construction technology from soil excavation reinforcement formwork concrete waterproof and attentions in construction. Key words:tall buildings;foundations;tower crane;caps;design;construction 1工程概况 重庆国金中心项目占地面积5万m2 总建筑面 积约64万m2 地下3层结构,局部为地下4层,裙 房及地下室总建筑面积约26万m2 地上共有5座 塔楼,T1塔楼地上64层,高度319.5m.2号塔式起 Q6-1区 重机处于地下3层的临边区域,主要负责T1 Q6-1 地下3层 2号搭式起重机 6260 Q6-2区的材料转运,其东侧及南侧均为地下4层, 塔式起重机距离地下3层与地下4层的分界线较 炮f3层与下4烩 近,如图1所示. Q6-2区 TI区 2塔式起重机周边环境条件 42区 本项目2号塔式起重机位于地下3层底板之 上,距离西侧挡墙6.35m 距离南侧地下4层承台边 图12号塔式起重机平面布置示意 4.05m.塔式起重机底部与地下4层高差较大,南 Fig.1 Layout of No.2 tower crane 侧与T1塔楼地下4层超深承台底部高差7.4m 东 侧与地下4层裙房底板高差3.6m 如图2所示.塔 1)由于塔式起重机所在区域岩石有沟壑及分 式起重机部位土方清底完成后,岩石面出现沟壑, 层现象,且塔式起重机安装及使用时,地下4层及地 地下...
施工技术 2016年3月下 122 CONSTRUCTION TECHNOLOGY 第45卷第6期 D0I:10.7672/sgjs2016060122 钢花管分段注浆工艺试验与检测* 谭文勇 (中铁建设集团有限公司,北京100040) [摘要]注浆钢花管在基坑工程中的应用已经较为常见,可以作为防水措施或与其他结构形成复合支护体系以承 担侧向荷载.全段二次间隔时间注浆是较为常用的工艺,该工艺在复杂地层条件下的适用性不强,常出现浆液在 全段范围内无法均匀扩散的情况.鉴于该情况,开发了钢花管分段注浆结构,在碎石土地层进行了全段注浆和分 段注浆的工艺对比试验.由于碎石地层孔隙通道发育,采用全段二次注浆工艺必须采取“多次少注”,确保足够间 隔时间的注浆方式才能确保注浆达到标准.而开发的分段注浆工艺能确保总注浆量,基本达到设计标准.工艺性 试验前后的勘察检验验证了分段注浆工艺的注浆效果,注浆显著降低了渗透系数.试验后的水平承载力试验与反 算验证了分段注浆工艺能够显著提高地基水平基床系数. [关键词]注浆工艺;钢花管;分段注浆;现场试验 [中图分类号]TU471*.8 [文献标识码]A [文章编号]1002-8498(2016)06-0122-07 Tests and Detection of Multi-section Grouting Technique of Steel Grouting Pipes Tan Wenyong (China Railway Construction Group Co. Led.Beijing 100040 China) Abstract:Steel grouting pipe was widely used in foundation excavation engineering.It can be used as anti-seepage structure assembled with other structures to afford lateral load as a posite supporting system.The full-section pipe grouting with time interval is a mon technique.However the grout can hardly diffuse uniformly along the whole pipe and is not applicable in plex stratums.A multi-section grouting structure system was developed and full-section grouting and multi-section grouting parison tests were carried out in the gravelly soil stratums.The pore channels in the gravelly soil were strongly developed.If the full-section grouting is applied we should inject grout more times and less grout each time so as to reach the design requirements.When the newly developed multi-section grouting wa...
施工技术 2015年6月上 26 CONSTRUCTION TECHNOLOGY 第44卷第11期 D0:10.7672/sgjs2015110026 钢结构连廊安装施工方法及力学分析 孙连波 (中铁建设集团有限公司,北京100040) [摘要]某研发中心实验楼,由于现场条件限制,不能搭设脚手架,导致主钢梁不能在空中拼接,与此同时,主梁在 地面拼接后的自重超出现场塔式起重机承载范围,现场又没有大型吊车站位位置,基于以上原因,给出了使用人工 手拉葫芦方法进行吊装的方法和步骤,并对吊装支架和主钢梁在自身重力作用下的受力性能进行了分析. [关键词]钢结构;钢连廊;安装;力学分析 [中图分类号]TU758.11 [文献标识码]A [文章编号]1002-8498(2015)11-0026-03 Installation Method and Mechanical Analysis of Steel Gallery Sun Lianbo China Railsway Construction Group Co.Lid.Beijing 100040 China) Abstract:Scaffold can not be set up because of field condition limits for some experiment building of research and development center thus main steel beam can not spliced.Meanwhile the dead weight of main beam exceeds the bearing range of tower crane on the spot there is no position of large crane.Based on the above reasons this paper introduces hoisting method and steps of manual hand chain hoist analyzes the mechanical behavior of hoisting stent and main steel beam under dead weight effect. Key words:steel structures;steel gallery;installation;mechanical analysis 1工程概况 本工程为某研发中心实验楼连廊,此研发中心 实验楼与拓展楼(4层、6层、8层之间)安装钢结构 连廊,建成后可以实现两楼4层、6层、8层之间相互 连通.本连廊主体采用钢结构,每连廊由2根主钢 梁、12根次钢梁组成,楼板为闭口镀锌组合楼板,外 图1连廊钢结构轴测图 立面为钢化玻璃栏板.连廊净跨为17.4m 宽为 Fig.1 Axonometric drawing of steel joint gallery 3.5m.连廊通过2根主钢梁与两楼之间混凝土牛 为H900×400x20×25(局部变截面),每根重5.7t 腿铰接滑动连接,钢梁与混凝土牛腿之间垫有 次梁截面为H400×250×10x14 每根重1.2t.主梁 60mm厚橡胶垫块. 每根分3段加工运至现场(分段长度根据设计要 本文主要讨论此种单层钢连廊根据现场条件 求、现场塔式起重机负荷及相关设计规范).现场 采用的较可靠可行的安装方法.连廊钢结构轴测 塔式起重机此位置最大吊重为1.3t 由于连廊位于 图如图1...
2016年2月上 施工技术 第45卷第3期 CONSTRUCTION TECHNOLOGY 79 D0I:10.7672/sgjs2016030079 钢结构屋面柔性防水施工技术在某工程中的应用 施耘,王佳全 (南通建工集团股份有限公司,江苏南通226001) [摘要]基于上海大众汽车有限公司新建车身车间钢结构屋面柔性防水施工,介绍了钢结构厂房柔性屋面防水施 工的施工顺序、施工工艺、细部节点处理和质量控制方法,阐述了钢结构厂房柔性屋面防水施工过程中的注意事 项,工程施工质量符合规范要求,竣工后经雨季考验无渗漏. [关键词]防水工程;钢结构;柔性防水材料;安装;压型钢板;施工技术 [中图分类号]TU761.1*1 [文献标识码]A [文章编号]1002-8498(2016)03-0079-03 Application of Flexible Waterproof Construction on Steel Structure Roofs Shi Yun Wang Jiaquan Nantong Construction Group Co.Ld.Nantong Jiangsu 226001 China) Abstract:Based on flexible waterproof construction of Shanghai Volkswagen Company's new workshop steel structure the flexible roofing waterproof construction sequence construction technology details of the joints processing and quality control method are introduced.Flexible roofing waterproof construction process is expounded and construction quality conformed to meet the specification requirements.After the pletion of test at the rainy season there is no leakage. Key words:waterproofing;steel structures;flexible waterproof materials;installation;steel plates;construction 1工程概况 施工顺序为:压型钢板安装→天窗支架安装→ 上海大众有限公司2个车身车间屋面均为钢结结构压型钢板工序交接检查→PE膜蒸汽隔绝层铺 构柔性防水屋面,分别竣工于2012年和2013年.设→岩棉保温板铺设一→PVC防水卷材铺设→压板 每个车身车间建筑面积均约为10万m2 基础形式固定和焊接连接→细部处理→清理验收. 为PHC预制管桩,承台杯口基础,主体结构为钢(网3主要施工工艺 架)结构,柱距24m×24m 钢柱截面600mm× 为保证施工质量,针对钢结构屋面柔性防水的 600mm(空调机房局部柱截面为700mm×600mm) 特点和工程特征,对如下质量控制点加以控制:① 网架下弦标高9.300m 空调机房顶标高22.600m. 屋面排烟天窗、虹吸雨水口、女儿墙等接口处密封 2轻钢屋面防水铺设施工顺序 处理;②合理分散施工人员,不过分集中致使荷载 屋面做法为:钢网架上钢条3%找坡,上铺 过大,导致屋面板...
施工技术 2015年10月下 104 CONSTRUCTION TECHNOLOGY 第44卷第20期 D0I:10.7672/8gis2015200104 钢结构优化设计基本方法* 邢遵胜,郦宏伟,陈君,贾尚瑞,邹航 (浙江精工钢结构集团有限公司,浙江绍兴312030) [摘要]我国建筑钢结构行业的飞速发展使钢结构从业人员面临重大挑战和机遇.从设定合理的结构性能目标、 结构体系的选择和创新、计算分析和校核调整、节点优化等方面,介绍了钢结构优化设计的基本方法,强调应综合 考虑计算理论、制造技术水平和施工条件等因素,确定合理的设计方案. [关键词]钢结构;设计;优化;计算分析 [中图分类号]TU391 [文献标识码]A [文章编号]1002-8498(2015)20-0104-06 Basic Method of Steel Structure Optimized Design Xing Zunsheng Li Hongwei Chen Jun Jia Shangrui Zou Hang Zhejiang Jinggong Steel Building Group)Co.Ltd.Shaoxing Zhejiang 312030 China) Abstract:The rapid development of China's steel structure industry has great challenges and opportunities for steel structure personnel.The paper introduces the basic method of steel structure optimized design from the aspects of setting a reasonable structural property target selection and creation of structural system calculation analysis and verification and connections optimizations.It emphasizes the prehensive considerations of calculation theory fabrication technical level and construction conditions are to be taken into account for determining a rational design scheme. Key words:steel structures;design;optimization;calculation analysis 0引言 最佳平衡.结构优化设计不是为了降低造价而减 近年来,由于钢结构自身的诸多优点(强度高、小构件截面,而是要根据建筑所处位置、地质条件、 自重轻、抗震性能好、施工周期短等),使其在大跨 气候条件、周边建筑布局、使用用途、外形和结构形 度、超高层和复杂异形空间建筑结构中大量应用,式、制造技术水平、现场施工条件等因素,综合考虑 各类高、大、难、异项目层出不穷,不论在数量上或后,对设计方案进行合理性修改.优化设计基本步 质量上都远远超过了过去,在设计、制造和安装等骤:设定结构性能目标→结构体系的对比和选择→ 技术方面都达到较高水平.这是专业设计人员和计算分析校核调整→节点优化设计. 钢结构制造、安装单位遇到的前所未有的挑战和机1设...
[关键词]超高性能水泥基复合材料;波纹型钢纤维;端钩型钢纤维;抗拉强度;断裂能 【中图分类号】TU528.58「文献标识码]A[文章编号〕1002-8498(2015)24-0022-05 InfluenceofSteelFibersonStrengtheningandTougheningof Ultra High Performance Cementitious Composites Peng Gaifei,Niu Xujing,Zhao Yilin (Faculty of Civil Engineering,Bejing Jiaotong University,,Beijing100044,China) Abstract:Based on the experirmental results of tensile loading and bending toughness testing of ultra high performance cemcntitious posites(UHPCC) incorporating steel fiber of different types,dosages and arrangement, the influence of steel fibers on strengthening and toughening of UHPCC were studied. The results indicate that the addition of steel fiber can significantly improve both tensile and bending toughness properties of UHPCC. The higher the dosage of steel fiber, the better the effect of strengthening and toughening is. Notably, the effect of crimped steel fiber on strength and toughness of UHPCC is more efficient than that of hooked steel fiber, which should be caused by the more pronounced mechanical
the orderly arrangement of steel fiber along the direction of tensile stress provides a better performance Key words:ultra high performance cementitious posites; crimped steel fiber; hooked steel fiber; tensile strength; fracture energy 近年来,随着我国基础工程大规模兴建、城镇混凝土增强增韧的一种重要手段。
2011年7月上 施工技术 第40卷第344期 CONSTRUCTION TECHNOLOGY 87 钢箱梁顶推施工过程内力分析 崔磊,陈艳华 (山东交通职业学院公路与建筑学院,山东潍坊261206) [摘要]为确定钢箱梁在顶推过程中的最不利状态,采用大型桥梁结构分析软件对钢箱梁和导梁的整个顶推过程 进行了数值模拟仿真,有针对性地分析钢箱梁和导梁的受力和变形,系统地分析了在恒载作用和恒载与风荷载共 同作用两种工况下钢箱梁的受力状态.在实际施工中还要不断进行理论模型的修正,使理论模型结果与结构的实 际状态最大限度一致. [关键词]钢箱梁;数值模拟;内力分析;挠度:有效应力 [中图分类号]U445.462 [文献标识码]A [文章编号]1002-8498(2011)13-0087-03 Analysis of Internal Force on Launching Construction of Box Girder Cui Lei Chen Yanhua College of Road and Architecture Shandong Transport Vocational College Weifang Shandong 261206 China) Abstract:In order to determine the most unfavorable state in launching construction of steel box girder authors use a large bridge structure analysis software to make numerical simulation analysis of the whole process.They make analysis on stress and deformation of steel box girder and guiding beam and make systematic analysis on stress state of steel box girder under dead load and dead load together with wind load.Theoretical model should be modified in practical construction to keep consistent with actual state of structure as possible. Key words:steel box girder;numerical simulation internal force analysis;deflection;effective stress 1分析模型和计算条件假定 1.2计算条件假定 1.1分析模型 为分析结构在最不利荷载工况下的受力和变形 黄河三桥钢箱梁顶推总长度为456m 按照跨径 情况,首要判别最不利工况,这就需要对钢箱梁和导 分为10个梁段.标准箱梁的截面特性:面积A= 梁在整个顶推过程中的受力和变形进行分析.先用 2.046m2 1 =4.267m 1 =311m 中性轴距截面上 程序计算出钢箱梁和导梁的截面特征值(如截面面 缘1.536m 距截面下缘1.990m.钢箱梁每m总重 积、截面抗弯惯性矩、抗扭刚度和剪切面积等),然后 为20.6t 桥孔范围内设置9个桥墩(包括临时墩和 建立杆系模型,以梁单元等效代替原有截面的截面特 永久墩),从左至右的墩间距为...
2013年4月下 施工技术 第42卷第8期 CONSTRUCTION TECHNOLOGY 21 D0L:10.7672/sgjs2013080021 钢管柱环梁梁柱节点施工技术* 周志健,王东,杨明,刘飞 (中国建筑第八工程局有限公司天津分公司,天津300452) [摘要]天津于家堡金融区起步区03-04地块工程地下室钢管柱环梁梁柱节点共206个,施工中通过优化节点并借 鉴梁柱节点加腋做法综合分析后,采用钢管柱环梁梁柱节点四边形加腋做法施工达到了设计要求,节约了施工工 期、提高了施工质量,取得了良好的经济效益和社会效益,重点介绍了钢管柱环梁梁柱节点四边形加腋施工工艺. [关键词]组合结构;钢管柱;环梁;节点;施工技术 [中图分类号]TU375.41 [文献标识码]A [文章编号]1002-8498(2013)08-0021-03 Construction of Steel Tube Column and Ring Beam Joints Zhou Zhijian Wang Dong Yang Ming Liu Fei Tianjin Branch China Construction Eighth Engineering Division Co. Lid.Tianjin 300452 China) Abstract:The plot 03-04 project in Yujiapu Financial District Tianjin has 206 steel tubular column and ring beam joints for its basement.By optimizing the joints and performing prehensive analysis with reference to haunch beam-column joints a quadrilateral haunch beam-column joints was applied to meet the design requirement.The construction of the quadrilateral haunch beam-column joints was introduced in detail.This method shortened the construction period improved the construction quality and obtained excellent social and economic benefits. Key words:posite structure;steel tube column;ring beam;joints;construction 1工程概况 工工期,采用四边形梁柱节点大大降低了施工难 于家堡金融区起步区03-04地块工程位于天津度,缩短了施工工期,并保证了钢管柱环梁梁柱节 市滨海新区于家堡金融区,该工程占地面积约3.4点施工质量. 万m2 总建筑面积约19.3万m2 建筑高度60m 地2技术背景 上12层,地下2层.根据建筑造型及使用功能,本2.1社会背景 工程结构形式采用框架多核心筒结构体系,主体结 现在建筑行业通用的钢管柱环梁梁柱节点做 构由8个筒体大跨度桁架梁与周边的钢管混凝土 法均为圆环形,这种做法从施工角度考虑存在着施 柱H型钢梁框架构成.其中地下室部分主要采用 工困难. 钢管混凝土柱钢筋混凝土梁、柱钢骨混凝土构 1)圆形钢...
2014年4月下 施工技术 第43卷第8期 CONSTRUCTION TECHNOLOGY 31 D0I:10.7672/5j52014080031 钢管柱外包环梁预拼装整体吊装技术 刘海东,王伟,孙伟波,陈诚,邓世强 (中建三局集团有限公司,湖北武汉430000) [摘要]华创国际广场工程1号塔楼地下室钢管柱通过外包环梁结构与钢筋混凝土结构连接固定,环梁钢筋加工 及绑扎难度大,且工程体量大、工期紧、质量要求高.针对具体情况,工程采用新型环梁预拼装整体吊装技术,论述 了环梁从施工前的深化设计到使用阶段的相应原理,重点介绍了施工过程中一些注意事项和处理问题的经验方 法.实践表明,应用该新型技术,能够保证环梁成型质量,满足工期要求. [关键词]钢结构;钢管柱;环梁;预拼装;整体吊装;钢筋 「中图分类号1TU758.11 [文献标识码]A [文章编号]1002-8498(2014)08-0031-03 The Pre-assembly and Integral Hoisting Technology for Steel-tube Column with Outer Ring Beam Liu Haidong Wang Wei Sun Weibo Chen Cheng Deng Shiqiang (China Construction Third Engineering Bureau Group Co.Lid.Wuhan Hubei 430000 China) Abstract:The steel-tube column in the basement of the No.1 tower building in Huachuang International Plaza project is connected and fixed with RC structure by wrapping ring beam structure.The reinforcement fabrication and banding of the ring beam is very difficult.The project amount is large the construction period is tight and the quality requirement is high.Based on the practical condition a new ring beam pre-assembly and integral hoisting technology is adopted.This paper discusses principle of the ring beam from detailed design to working stage importantly introduces some attentions during construction and some experience method during problem treatment.The practice shows that the new technology can meet forming quality of the ring beam and construction period requirement. Key words:steel structures;steel-tube column;ring beam;pre-assembly;integral...
2010年4月 施工技术 第39卷第4期 CONSTRUCTION TECHNOLOGY 85 钢管支架用直角扣件抗滑移试验研究 肖炽1,周观根2,杨乾慧3 (1.东南大学土木工程学院,江苏南京210096;2.浙江东南网架股份有限公司,浙江杭州311209; 3.杭州萧山区质量计量监测中心,浙江杭州311202) [摘要]扣件式钢管脚手架用于承重支架时,立杆、水平杆、斜杆相互间用扣件连接.通过对直角扣件施加不同的 扭紧力矩,对新旧扣件进行试验研究,得出扣件螺栓扭紧力矩与抗滑移的关系,并提出抗滑移系数的概念.指出扣 件式钢管支架安装时扣件扭紧力矩必须≥40m;对于新扣件,扭紧力矩增大,抗滑移有一定提高,但对于旧扣件, 容易造成滑丝,不安全.目前市场上T形螺纹质量较差,建议施工前对旧扣件螺栓进行检查. [关键词]钢管支架;直角扣件;抗滑移;试验研究 [中图分类号1TU502.6 [文献标识码]A [文章编号]1002-8498(2010)04-0085-02 Experimental Study on Anti-sliding Performance of Right Angle Fastener Used for Steel Tubular Stent Xiao Chi' Zhou Guan'gen2 Yang Qianhui (1.School of Civil Engineering Southeast Unipersity Nanjing Jiangsu 210096 China; 2.Zhejiang Southeast Space Frame Co.Lad.Hangzhou Zhejiang 311209 China; 3.Xiaoshan Region Quality and Measure Monitoring Center Hangzhou Zhejiang 311202 China Abstract:When fastener-style steel tubular scaffold is as bearing stent upright stanchion horizontal bar and oblique bar are connected by fastener.Through experimental study on new and old fasteners applying different tightening moment on right angle fastener the relationship of tightening moment of fastener bolt and anti-sliding performance is gained and the anti-sliding coefficient is indicated.It is indicated that the tightening moment of fastener must be greater than and equal to4ONm as new fastener anti-sliding performance can improve as tightening moment increase however sliding wire is easy for old fastener. Because of low quality of T-shape thread checking old bolt be...
施工技术 2011年7月上 84 CONSTRUCTION TECHNOLOGY 第40卷第344期 钢管支墩与贝雷梁支架在现浇梁施工中的应用 毕永清 (中铁十七局集团第二工程有限公司,陕西西安710043) [摘要]以厦深铁路大门埠特大桥为例,通过方案比选,梁部施工采用钢管支墩与贝雷梁支架的方案.介绍了孔跨 布置中的注意事项、贝雷梁的布置形式,从荷载的取值、贝雷梁、分配梁受力、钢管支墩以及基础受力等几方面详细 介绍了方案的设计计算过程,提出了施工中的质量和安全控制要点.工程实践表明,该方案取得了良好的社会经 济效益. [关键词]连续梁;跨距;结构设计;布置形式;受力计算 [中图分类号]U445.471 [文献标识码]A [文章编号]1002-8498(2011)13-0084-03 Application of Steel Buttress and Bailey Beam Support Used in Construction of Cast-in-place Beam Bi Yongqing The 2nd Engineering Co.Ltd.of China Railway 17th Bureau Group Corporation Xi'an Shaanxi 710043 China) Abstract:Based on Damenbu bridge of Xiamen-Shenzhen railway steel buttress and bailey beam support are adopted in girder construction.Attentions of span layout arrangement of bailey beam are introduced design calculation process is introduced in detail from load value bailey beam stress of distribution beam steel buttress and stress of basement.Further more author proposes control points of quality and safety in construction.Engineering practice shows that good effect is obtained. Key words:continuous beam;span;structure design;arrangement;stress calculation 1工程概况 6.432m 直线现浇段梁高均为3.832m 箱梁顶板厚 大门埠特大桥是厦深铁路(惠深段)架梁的首0.4~0.69m 底板厚0.5~1m 腹板厚0.5~1.0m. 要通道,其中跨越惠大高速公路连续梁是该桥架梁连续梁结构如图1所示. 工期的控制性工程. 336520026002005000 20026002003365 大门埠特大桥连续梁跨越惠大公路,斜交63°, 中 连续梁结构形式为48m80m48m 中墩为9号和 10号,边墩为8号和11号.连续梁采用钻孔灌注 图1支架现浇连续梁结构 桩基础,承台尺寸9.6m×14.6mx3.0m;边墩承台 Flg.1 The structure of continuous beam 设计为11.1mx6.9mx2.0m 墩身设计全部为双线 2支架结构形式比选 圆端形桥墩. 1)碗扣件支架主...
2016年11月上 施工技术 第45卷第21期 CONSTRUCTION TECHNOLOGY 99 D0I:10.7672/5gj52016210099 钢管托换取代传统换撑方式拆除深基坑内支撑技术 陈洁1,陈为2,李凤伟,刘创3 (1.中建三局集团有限公司(北京),北京100026;2.四川省兴华工程项目管理有限公司,四川成都610000: 3.中建三局集团有限公司大项目管理公司,北京100026) [摘要]某工程工期紧张,其运用钢管托换技术替换传统换撑施工方案,成功换撑、拆撑,克服了常见换撑方式拆除 钢筋混凝土内支撑所引起的施工周期长和人员窝工等弊端,拓展了支护桩钢筋混凝土内支撑在深基坑支护中的 应用优势,效果显著. [关键词]深基坑;支撑;拆撑;钢管托换;支护桩;施工技术 [中图分类号]TU473.2 [文献标识码]A [文章编号]1002-8498(2016)21-0099-04 Technology of Steel Pipe Underpinning Technology to Replace Traditional Demolition of Lateral Bracing of Deep Foundation Excavation Chen Jie' Chen Wei? Li Fengwei' Liu Chuang (1.China Construction Third Engineering Bureau Group Co.Lad.Beijing) Beijing 100026 China; 2.Sichuan Province Xinghua Engineering Project Management Co.Lid.Chengdu Sichuan 610000 China; 3.China Construction Third Engineering Bureau Group Co.Ltd.High-end Management Corporation Beijing 100026 China) Abstract:Because of limit period a project applied steel pipe underpinning technology to replace traditional demolition scheme which overe the disadvantages caused by the mon way in supporting to demolish the lateral bracing of the reinforeed concrete such as long construetion period and work stoppages.This technology expands the application advantage in deep foundation excavation supporting of the supporting pile and lateral bracing of the reinforced concrete the effect is remarkable. Key words:deep foundation excavation;supports;support demolition;steel pipe underpinning;support pile;construction 0引言 期目标. 在众多...
2015年11月上 施工技术 第44卷第21期 CONSTRUCTION TECHNOLOGY 123 D0I:10.7672/8gis2015210123 钢管少支架在山区高墩现浇箱梁中的应用 光明,姚斐,王静华 (中交一公局第一工程有限公司,北京102205) [摘要]通常情况下,现浇箱梁施工采用满堂支架,但对于山区地势陡峭、支架高度较高、横坡较大的现浇箱梁而 言,采用钢管少支架,即钢管柱和贝雷片作为支架,能够大大提高支架的安全性,同时还可以减少人员、材料的投 人.结合麻城至武穴高速公路木子店互通C匝道4-12号墩之间现浇箱梁施工实例,着重介绍墩高达38m、横坡 6%情况下钢管少支架的组成结构、受力验算以及在施工中的应用. [关键词]桥梁工程;钢管贝雷支架;山区高墩;现浇箱梁 [中图分类号]TU731.2 [文献标识码]A[文章编号]1002-8498(2015)21-0123-03 Application of Scaffolds with Less Steel Tube for Cast-in-situ Box Girder with High Piers in Mountain Area Guang Ming Yao Fei Wang Jinghua No.1 Engineering Co.Ltd.of FHEC of CCCC Beijing 102205 China) Abstract:The cast-in-situ box girder always constructed with full scaffolds but for the steep mountain terrain because of large height support and large slope cast-in-situ box girder constructing with scaffolds with less steel tube steel tube column and bailey as a scaffold can greatly improve the safety of the scaffolds it can also reduce the personnel and material inputs.With the example of the construction of the cast-in-situ box girder between the Macheng and Wuxue highway the bridge between ramp C and No.4 to No.12 piers the structure and the stress calculation and the application of the steel tube under the condition of 38m and cross slope 6%are mainly introduced. Key words:bridges;steel pipe bailey;mountain high piers;cast-in-situ box girders 1工程概况 4×20.5(20.5212019)(202820) 本项目北起麻城,南通武穴,将沪蓉、武英、沪4×20.75(20282020),桥梁上部结构 渝3条东西向高速公路连线成网,是济广国家高为第1 5联为预应力钢筋混凝土连续箱梁,单箱 速和大广...
2014年9月下 施工技术 第43卷第18期 CONSTRUCTION TECHNOLOGY 13 D0I:10.7672/5js2014180013 钢筋网片机械连接装置及施工技术研究* 李智斌,赵杰,邵康节,张涛,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]钢筋网片的应用能减少现场安装作业,加快施工进度,是钢筋工程专业化、工业化发展的重要内容.提出 了一种钢筋网片采用机械连接时的连接装置及其施工方法.实践证明,径轴双向可调节型套筒可实现钢筋网片的 连接,可以保证钢筋连接的性能,对缩短施工周期有明显效果,具有较大的社会与经济效益. [关键词]钢筋网片;机械连接;套筒;施工技术 [中图分类号]TU649;TU755.32 [文献标识码]A[文章编号]1002-8498(2014)18-0013-03 Research on Mechanical Splicing Device and Construction Technology for Steel Fabric Li Zhibin Zhao Jie Shao Kangjie Zhang Tao Feng Dabin Zhao Jida Institute of Building Structures China Academy of Building Research Beijing 100013 China) Abstract:With the application of steel fabric on-site installation can be reduced and the construction schedule can be accelerated which is important for specialization and industrialization development of rebar engineering.A mechanical splicing device and related construction methods for steel fabric is provided in this article.It proves that the radial and axial adjustable sleeve can realize the steel mesh construction ensure the capability of steel bars connection shorten the construction time with great social benefits and economic benefits. Key words:steel fabric:mechanical contact;sleeves;construction 0引言 《钢筋机械连接技术规程》JGJ107—2010[中I级 在工厂内加工成型钢筋运至现场安装是钢筋 接头的性能要求. 工程发展的重要方向,钢筋网片的工厂预制是其中 的一项重要内容,预制的钢筋网片减少了现场作业 量,能够有效加快施工进度.无论在水平构件还是 竖向构件中,钢筋网片均可以采用搭接、焊接和机 械连接等方式进行连接.传统的搭接连接方式存 在材料浪费、成本较高、布筋密度高等问题,而焊接 连接方式则存在施工速度慢、质量较难控制、施工 费用较高等问题,机械连接特别是直螺纹钢筋连接 x方问连接 技术将成为解决以上问题的有效途径,但目前国内 图...
[关键词]钢筋焊接网;房屋建筑;规范;应用;效益 [中图分类号]TU711[文献标识码]A[文章编号】1002-8498(2017)04-0053-05 ApplicationofWeldedSteelFabricinBuildingConstruction Lim Chin Loon,Lin Guozhen,Liu Xiuhuo (Xinglian Steel Mesh(Shenzhen)Co.,Ltd.,Shenzhen,Guangdong 518106,China) Abstract:Introducing the development,features,applications,on-site photos and selected project references of welded steel fabric in worldwide.Analyzing the economic factors against traditional on site steel fixing,further enhancing the advantages of welded steel fabric. Key words:welded steel fabric;building construction; specifications;applications;benefit 1钢筋焊接网在房屋建筑的发展箍,再将主钢筋插人箍筋中绑扎成梁、柱钢筋笼后, 钢筋焊接网的发明始于20世纪初期,在20世由工厂配送工地现场组装,达到节约大量现场施工 纪二三十年代,正规的钢筋焊接网厂陆续在美国、成本,提高现场施工速度和减少劳动力等优势。
施工技术 2010年12月 56 CONSTRUCTION TECHNOLOGY 第39卷第12期 钢筋桁架模板安装技术 陈钧1,项玲娜2,叶宇3,陈帅3,刘笛3 (1.浙江迪安诊断技术股份有限公司筹建部,浙江杭州310030; 2.中国城市建设研究院浙江分院,浙江杭州310012;3.浙江省一建建设集团有限公司,浙江杭州310013) [摘要]钢筋桁架模板是将楼板中钢筋在工厂加工成钢筋架,与底模连接成一体的组合模板,具有经济、便捷、安 全,可靠等优点.重点介绍了钢筋桁架模板施工工艺,包括支撑角钢施工、边模施工、梁上弹线确定位置、板材及配 件清理、钢筋桁架模板吊运、安装钢筋桁架模板、栓钉焊接、管线敷设等.该方法成功应用于杭州钱江新城集美国 际大厦工程. 【关键词]钢筋桁架模板;角钢;安装;焊接 [中图分类号]TU755.2 [文献标识码]A[文章编号]1002-8498(2010)12-0056-04 Installation Technology of Reinforcement Truss Formwork Chen Jun' Xiang Lingna2 Ye Yu' Chen Shuai Liu Di' (1.Zhejiang D.A.Diagnostics Technical Co.Lid.Preparation Department Hangzhou Zhejiang 310030 China; 2.Zhejiang Branch China Urban Construction Design Research Institute Hangshou Zhejiang 310012 China; 3.Zhejiang Yijian Construction Group Co.Ltd.Hangzhou Zhejiang 310013.China) Abstract:The floor reinforcement is processed to reinforcement truss in factory which is connected with bottom formwork to form reinforcement truss formwork.It has characteristics of economy convenience safety and reliability.The construction technologies for reinforcement truss formwork are introduced in detail including support angle steel construction side formwork construction location for snap line of beam cleaning of sheet and fittings hoisting and installation of reinforcement truss formwork bolt welding pipeline laying and so on.This method has been successfully used in Jimei International Building of Hangzhou Qianjiang New Town. Key words:reinforcement truss formwork;angle steel;installation...