[关键词】钢结构;大直径;立式;指环形;施工 [中图分类号]TU758[文献标识码】A[文章编号]1002-8498(2012)20-0082-03 Key Technologies ofLarge-diameterVerticalRing-shaped SteelStructure Construction Duan Kaiyuan, Guo Zhengxing (School of Ciuil Engineering,SoutheastUnivesity,Nanjing,Jiangsu210096,China) Abstract;The Bauhinia Park View Tower in Changzhou was designed as a large-diameter vertical ring- shaped steel structure which was originated in China. During the construction process,a lot of dificulties should be confronted because of special structure. In the paper, the structure installation method,the steel box girder manufacture technique and the technology of weld-seam deformation controlling were studied.The practical problems in construction were solved.The results provide the technical support for the structure successful pletion.
1工程概况内侧钢 紫荆公园景观塔地处该公园西部,为城市地标管桁架 性构筑物。
[关键词]幕墙;挑檐;双曲铝板;拼装;整体吊装;安装 [中图分类号】TU767[文献标识码】A【文章编号】1002-8498(2015)05-0069-04 TheResearch and Application ofInstallation ofHyperbolic Cornice AluminumPlatewithLargePlateatHighAltitude Wang Jiangbo,Hui Wenjun,Chen Qiang (China Construction Third Engineering Bureau Co.,Ltd.,Wuhan,Hubei 430074, China) Abstract: Curtain wall with hyperbolic aluminum plate is used in Wuhan New Energy Institute engineering,the installation height is nearly 110 meters,the longest cantilever length is 21 meters away from main concrete structure, scaffold and core barrel are not used in installation of curtain wall with hyperbolic aluminum plate,the integralhoisting method of large plate with unit type bined with frame hyperbolic aluminum plate,reduces security risk. Engineering practice shows that the new installation method can save cost and shorten time limit. Key words:curtain walls;cornice;hyperbolic aluminum plate;assembly;integral hoisting;installtion 0引言综合利用现有风能、水能及太阳能等多种节能技术 随着经济高度发展及思想观念的解放,建筑结和新能源技术,以期实现在日照充足的情况下“零” 构形式日趋新颖,异形幕墙工程数量与日俱增,越常规能源供应的目标。
[关键词]隧道工程;偏压;陡坡;台阶法;施工技术;有限元分析 [中图分类号]U45 5[文献标识码]A[文章编号]1002-8498(2015)16-0118-04 ConstructionTechnologyofSteepSlopeUnsymmetrical LoadingPortalofLarge-sectionTunnel Jiang Junfeng (China Railway Construction Bridge Engineering Bureau Group Co.,Ld.,Tianjin 300300,China) distribution caused by construction disturbance is one of the induction factors on slope sliding or shallow segment collapse.For the Xiaomanping tunnel outlet section as the background engineering, the author construction speed and ensure construction safety. Key words:tunnels;unsymmetrical loading; steep slope;bench method;construction;finite element analysis 近年来,我国隧道建设进人高峰期,出现大量黄土、细角砾土、卵石土、漂石土及第四系全新统坡 在建和待建的山岭隧道工程。
施工技术 2011年6月下 70 CONSTRUCTION TECHNOLOGY 第40卷第343期 大截面导线架线施工技术 马建荣1,杨保晶2 (1.武警水电第二总队八支队,福建厦门361009;2.武警水电第二总队,江西南品330096) [摘要]某新建±660kV直流输电线路采用1000mm2大截面导线.此大截面导线结构和架线技术与扩径导线有 很大不同.结合工程实际情况,主要介绍了架线设备的选型、张力放线、导线压接环节的技术要点及施工注意事 项.经过严密组织,圆满完成了施工任务. [关键词]输电线路;大截面导线;张力放线;导线压接;施工技术 [中图分类号]TM726.3 [文献标识码]A[文章编号]1002-8498(2011)12-0070-03 Construction Technology of Large Cross-section Wire Lines Ma Jianrong' Yang Baojing? (1.No.8 Detachment No.2 Hydropoteer Force of Armed Police Xiamen Fujian 361009 China; 2.No.2 Hydropower Force of Armed Police Nanchang Jiangxi 330096 China) Abstract:One thousand square millimeters large cross-section wire is used in some new constructed ±660 kV direct current transmission line.The structure and construction technology are significantly different with traditional expanding wire.Authors introduced key technical points and attention factors of the large cross-section wire mainly from wiring equipment selection tension stringing and wires joint. Through strictly organization the construction task is successfully pleted. Key words:transmission line;large.cross-section wire;tension stringing;wires joint;construction technology 1工程概况 ≥226.1kN 牵引轮槽直径≥750mm.主牵引机选 某新建±660kV直流输电线路第2标段起始于用现有的WQT280-Ⅱ型牵引机.其最大持续牵引 宁陕交界,终止于陕西靖边县.设计最高气温力为250kN 最大牵引速度5km/h 牵引轮槽直径 40℃,最低气温-30℃,最大风速27m/s 30m/s 设960mm 整机质量12000kg 满足本工程放线要求. 计覆冰厚度10mm.线路总长108.9km 导线采用 2)张力机主张力机单根导线额定制动张力 JL/G3A-1000/45型钢芯铝绞线,子导线4根,呈正T≥33.915kN 导线轮槽底直径满足D≥1583mm. 四边形排布,分裂间距为500mm 长888.7km.采用根据施工地形及道路...
[关键词】钢结构;管桁架;胎架布置;分段累计滑移;施工技术 [中图分类号]TU758.11[文献标识码]A[文章编号】1002-8498(2015)22-0058-04 LargeCantileverAsymmetricSpaceStereoPipe TrussIntegralSlidingTechnology ZhangXiaoxiong (Zhongyifeng Construction Group Co.,Lid.,Suzhou,Jiangsu 21500o,China) Abstract;This paper introduces that asymmetric spatial truss cantilever of the third phase No. 2 pavilion of expo roof truss was installed successfully by accumulative sliding method by segment. The author analyzesandcalculatesindetail thejigarrangementbefore slidingand lading during sliding,whichcan assure the construction is implemented frequently. Key words:steel structures;pipe truss;jig arrangement; accumulate sliding by segment;construction 1工程概况 苏州国际博览中心三期工程2号建筑主体结构 为剪力墙结构体系,主体钢结构主要包括框架钢 柱、楼面钢梁和楼面钢桁架(主要分布在3层楼面 上),屋面为钢桁架结构;另外南北两个核心筒局部a 立面 内埋钢骨柱。
施工技术 2016年7月下 128 CONSTRUCTION TECHNOLOGY 第45卷第14期 D0I:10.7672/8js2016140128 大悬挑变截面钢桁架施工及控制关键技术* 王大磊,余流,高璞,张倩,许德亮,刘海微 (中国建筑第六工程局有限公司,天津300451) [摘要]基于鄂尔多斯市体育中心体育场工程实践,简要介绍大悬挑变截面钢桁架高效施工及控制关键技术,包括 支撑架设计、分段拼装施工、卸载过程仿真分析等.结果表明:所采用的施工技术切实可行,大幅度缩短工期,具有 良好的经济效益和社会效益. [关键词]钢结构;桁架;拼装;仿真分析;施工技术 [中图分类号]TU323.4;TU391 [文献标识码]A [文章编号]1002-8498(2016)14-0128-04 Key Construction and Control Technology on Large Cantilevered Steel Truss with Variable Cross Sections Wang Dalei Yu Liu Gao Pu.Zhang Qian Xu Deliang Liu Haiwei (China Construction Sixth Engineering Dirision Co.Lid.Tianjin 300451 China) Abstract:Based on engineering practice of Sports Center Stadium project in Ordos City key construction and control technology on large cantilevered steel truss with variable cross sections are introduced such as frame design segmented assembly construction unloading process and simulation analysis.The results show that the technology is feasible and greatly shortens the construction period which have excellent economic and social benefits. Key words:steel structures;trusses;assembling;simulation;construction 钢桁架结构作为一种空间杆系结构,近年来在普通座席55518个、主席台贵宾座席257个.分成 实际工程中得到越来越广泛的应用.由于大型体东、西、南、北4个看台区以及空中沙龙.其中南、北 育场馆的需要,钢桁架结构的需求越来越大.钢桁 看台地上5层,楼层标高分别为:±0.000 8.000, 架具有安全储备大、抗震性好、节省钢材、内部空间14.000.19.100 25.945 36.745m:东、西看台地上3 大、外形优美多样的优点.然而,由于杆件和节点 层,楼层标高分别为:±0.000 8.000 14.000m.空 几何尺寸的偏差以及曲面的偏离对桁架内力以及 中沙龙位于西侧看台上部.体育场看台罩棚为一 整体稳定性的影响非常大,所以对构件加工和安装 环形悬挑桁架结构,体育场檐口最高点标高 精度的要求非常高,大悬挑变截面钢桁架施工难度 68.430m 斜柱状结构体最高点标高78.433m. 更大....
施工技术 2014年3月上 122 CONSTRUCTION TECHNOLOGY 第43卷第5期 D0I:10.7672/sjs2014050122 大庆西站跨层重载桁架在整体结构中 的静力弹塑性研究* 李慧 (中铁第一勘察设计院集团有限公司,陕西西安710043) [摘要]大庆西站跨层桁架结构跨度大,荷载大,形状奇异,受力复杂,在站房整体结构中发挥着重要作用.在站房 整体结构中,跨层桁架为结构薄弱部位.为保证站房整体结构在罕遇地震下的塑性变形能力及极限承载能力,对 站房结构进行了静力弹塑性分析研究.研究了站房结构在x γ向的变形能力,得到结构能力谱曲线.研究表明: 站房整体结构两侧的格构柱、跨层桁架的下弦杆为结构薄弱部位,塑性铰出现早.在多遇地震下,整体结构构件完 好;在罕遇地震下,构件不严重破坏,承载力达到极限值后基本维持稳定,满足《建筑抗震设计规范》GB50011一 2010水准性能要求. [关键词]钢结构;火车站;桁架;跨层桁架:静力弹塑性 [中图分类号]TU399;TU313 [文献标识码]A [文章编号]1002-8498(2014)05-0122-04 Pushover Study on Cross-layer and Heavy-load Truss Structure in Integral Structure for Daqing West Railway Station Li Hui China Railway First Survey and Design Institute Group Lid.Xi'an Shaanxi 710043 China) Abstract:Daqing West Railway Station's cross-layer truss with shape strange long span heavy-load which plays important role in the whole structure of station building.Cross-layer truss is weak region in the whole structure for the railway station.In order to ensure plastic deformation and ultimate bearing capacity of the whole structure this paper analyzes pushover of the railway station structure and studies structure deformation capacity at x direction y direction.Research shows that:lattice column and cross- layer truss lower boom are weak region in the whole structure.When it meets with frequent earthquakes structural members are intact;when it meets with seldom earthquakes damage of structural members is not serious.All studies satisfy current seismie design code. Key words:steel st...
施工技术 2012年5月上 104 CONSTRUCTION TECHNOLOGY 第41卷第364期 大型设备预埋件定位测量技术 魏玉明,孔令杰,党星海 (兰州理工大季土木工程学院,甘肃兰州730050) [摘要]通过对兰州理工大学地震模拟台预埋件精密定位项目测量实例的介绍,分析了大型设备预埋件测量技术 的特点,阐述了精密定位的有关问题,并针对预埋件所处的特定地理位置和混凝土的浇筑情况,首次提出并采用一 次建立控制网的方法,并且充分利用前方交会、后方交会及自由设站等方法,也为今后大型设备测量技术的应用提 供了有效的途径和方法. 【关键词]测量;预埋件;精密定位;控制网;交会 【中图分类号]TU198.2[文献标识码]A[文章编号]1002-8498(2012)09-0104-02 Measurement Techniques for Large Equipment Embedded Part Wei Yuming Kong Lingjle Dang Xinghai School of Civil Engineering.Langhou University of Technology Lanzhou Gansu 730050 China) Abstract:By introducing precision positioning of embedded parts of earthquake simulator in Lanzhou University of Technology large equipment embedded parts positioning characteristics are analyzed some problems of the precise positioning are described.Based on specific geographic location of embedded parts and concrete pouring one time of establishing control network is firstly proposed and adopted forward intersection resection and free station and other methods are also fully used. Key words:measurement;embedded parts:precision positioning;control network;intersection 1工程概况 果统计出的边长测量精度为±0.2mm 方向精度为 兰州理工大学地震模拟振动台的基础中有8个±0.5,经实测对比,精度完全满足要求,因此先进 主要的预埋部件,其中14号位于基础坑底,与垂 行基坑底部1~4号预埋件的初步定位,初定后,对 直方向的加振器周连,控制上、下振动;5-8号位于1~2号距离采用多测回距离测量且采用经标定后 基坑侧面,与水平方向上的4个加振器固连,用来控的钢尺进行检核,其精度满足要求后,把1 2号点作 制侧向振动.这8个预埋部件要求很高的定位精为临控点,令1号点坐标为(1000 1000),然后根 度,精度要求0.4mm 英方提出预埋部件面板中心 据1~2号的距离,假定某一方位角,计算得到2号 在x y a B y六轴方向上的误差要<0.4mm.如 点的坐标,这样1 2号点坐标就是完全满足精度要 何控制6个方向的偏差是工程成败的关键. 求的点,利...
2014年4月下 施工技术 第43卷第8期 CONSTRUCTION TECHNOLOGY 93 D0I:10.7672/5js2014080093 大型设备吊装阶段施工管理 朱寒玉1,李蓉2,吴刚1,张文博,周京1 (1.中建三局第三建设工程有限责任公司安装公司,湖北武汉430074; 2.中建三局集团有限公司北京公司,北京100097) [摘要]大型设备的吊装是厂房类建筑工程施工后期的施工重点,也是整个施工建设阶段的难点.近年来随着厂 房建设规模越来越大,厂房内设备逐渐也呈现出模块化趋势,单模块质量大,尺寸大,吊装施工难度大.以某薄膜 液晶体管液晶显示器件(TFT-L.CD)项目综合动力站(CUB)建筑为背景阐述大型设备吊装阶段的管理过程及思路. [关键词]安装;设备;吊装;施工;模块:管理 [中图分类号]TU923;TU758.15 [文献标识码]A [文章编号]1002-8498(2014)08-0093-03 Construction Management on Hoisting Stage of Large Equipment Zhu Hanyu' Li Rong' Wu Gang' Zhang Wenbo' Zhou Jing' (1.Installation Company The Third Construction Co.Lad.of China Construction Third Engineering Bureau Wuhan Hubei 430074 China;2.China Construction Third Engineering Bureau Group Co.Ltd.Beijing) Beijing 100097 China) Abstract:Large equipment's hoisting is key construction stage for workshop which is also difficult on the whole construction stage.In recent years with the factory construction scale bees bigger and bigger equipment in the workshop shows module trend.Weight and dimension of some single module are large the hoist construction is difficult.On the basis of some CUB building in a TFT-LCD project the authors show the management process and thought of the large equipment hoist. Key words:installation;equipment;hoists;construction;module;management 京东方第8.5代线项目综合动力站房(CUB) 所示. 地下1层,地上3层.1层为冷冻机房,2层为换热、 表1吊装设备 水泵房,3层为空气压缩机房.1层地面标高为 Table 1 Hoisting equipments ±0.000 2层地面标高为8.500m 3层地面标高为 序号 材料名称 规格型号数量 用途 16.000m 屋顶标高为23.950m.综合动力站中大 1 汽车式起重机/台 1601 1...
施工技术 2011年11月上 60 CONSTRUCTION TECHNOLOGY 第40卷第352期 大型群组地脚螺栓三维可调式整体预埋技术研究 梁复 (河北省第四建筑工程公司,河北石家庄050051) [摘要]传统的螺栓预埋方式,其安装精度不能满足大型设备螺栓安装要求.介绍了一种新型的大型群组地脚螺 栓三维可调式整体预埋技术.该技术在施工时通过制作定位板,准确周定群组螺栓相对位置,通过调整定位板上、 下螺母,调整螺栓高度,在基槽周边布设钢筋拉错,以调整群组螺栓的轴线位置,在浇筑混凝土时,随时监测调整, 以达到螺栓精确预埋的目的. [关键词]安装;螺栓;地脚螺栓;预埋;定位控制 [中图分类号]TU758.13 [文献标识码]A〔文章编号]1002-8498(2011)21-0060-03 Study on 3-D Adjustable Integral Pre-buried Technique on Large Foundation Anchor Bolts Group Liang Fu Hebei Fourth Construction Engineering Co. Shijiazhuang Hebei 050051.China) Abstract:The installation precision of traditional pre-buried bolts methods can not meet the bolts installation requirement of the large equipment.The author introduces a new kind of 3-D adjustable integral pre-buried technique on large foundation anchor bolts.The new technique is that during construction relative position of bolts group can be accurately fixed by making position-plate;the bolt's height can be determined by adjusting the top and bottom nut of the position plate;the axial position of bolts group is determined by setting up pulling anchor bars in the surrounding of foundation;the bolts position is monitored and adjusted on time during pouring concrete.The new technique can meet the precision requirement of pre-buried bolts. Key words:installation;bolts;foundation bolts;pre-buried;position control 工业建筑施工中,很多大型设备的安装螺栓采④预埋安装精度高,合格率可达到100%,保证了设 用基础预埋方式,其安装精度要求也越来越高,通备的安装质量. 常采用预留螺栓孔洞的施工方法,不能满足安装精2工艺原理 度和受力要求,是工业建筑施工的重点控制项目, 施工时通过制作定位板,准确周定群组螺栓相 也是大...
[关键词】项目管理;风险管理;安全运营;风险评估 [中图分类号】TU714[文献标识码】A[文章编号]1002-8498(2013)24-0001-04 Researchon theFrame ofBuildingSafeOperationRisk ManagementSystem Wang Zaijun (Shanghai Jianke Engineering Consulting Co.,Ld.,Shanghai 200032,China) Abstract:At present, the large-scale construction operations on urban security risk assessment and management techniques are less studied at home and abroad,and there are no integrated risk response. For large buildings operational phases of risk management features and dificulties,a set of proposed monitoring,early warning, emergency response in one of the risk management system framework program is put forward.The system enables safe operation of city buildings to effctively predict risk, the risk characteristics of the whole process tracking,risk level of effctive early warning and achieves timely emergency treatment for significant risk event. Key words:project management;risk management; safe operation;risk assessment
0引言建筑工程等建设风险评估和管理方面的系统较多, 我国建筑业长期以来一直存在重建设、轻运营且可以实现施工全过程有效、阶段性风险管理,但 维护的端,城市建筑物在长期运营过程中累积了是,这些系统无法实现监测、预警和应急响应的一 诸多安全隐患,致使其安全运营事故频发。
施工技术 2015年8月上 20 CONSTRUCTION TECHNOLOGY 第44卷第15期 D0I:10.7672/8js2015150020 大型建筑场区工程测量控制网布设及精度保证措施 吴闯,朱瑞,邹利群,王亚桥,黄挡玉 (中建三局集团有限公司工程总承包公司,湖北武汉430070) [摘要]大型建筑场区,根据现场踏勘情况和建筑物的设计造型相结合,布设合理的工程测量控制网,保证控制网 的精度,既能快速指导工程施工,又能满足设计、施工要求.以新郑国际机场二期扩建工程2航站楼为例,介绍测 量控制网的布设和精度保证措施.通过建立同一个测量控制网,在交叉施工区域或相互衔接部位,各参建单位均 使用施测的场区测量控制网成果,通过统一控制点三维坐标,相邻区域使用同一控制点,对各衔接区域进行测量放 线控制,过程中加强对控制网联测及复核.实践证明,该技术效果良好. [关键词]机场:航站楼;测量:测量控制网:精度 [中图分类号]TU71 [文献标识码]A [文章编号]1002-8498(2015)15-0020-03 Control Network Layout and Accuracy Guaranty Measures of Large Construction Field Area Engineering Survey Wu Chuang Zhu Rui Zou Liqun Wang Yaqiao Huang Dangyu General Contraction Company of CCTEB Wuhan Hubei 430070 China) Abstract:In large construction area according to the site survey and building bining design engineers should design reasonable engineering survey control net and guarantee the accuracy of control net can not only guide construction but also meet the design and construetion requirements.Taking the terminal T2 of Xinzheng International Airport expansion project for example this paper introduced the design of control network and method to guarantee precision.Through setting a control network all of the participation units using the same control network in crossing construction or interrelated parts.Then by unified 3D coordinates of the control points or using the same control point at interrelated parts and enhancing the control network survey and review the survey accuracy can be guaranteed.It proves tha...
2014年11月上 施工技术 第43卷第21期 CONSTRUCTION TECHNOLOGY 67 D0I:10.7672/5js2014210067 大型地下工程抗拔锚杆结构设计与施工 毛立贤,张林林,张强1,任佳2,齐骥 (1.中国建筑第八工程局有限公司大连分公司,辽宁大连116021;2.大连恒隆地产有限公司,辽宁大连116011) [摘要]抗拔错杆作为一项竖向锚固技术,在施工工期与工程成本上显示其优越性,但本文工程中,地下工程规模 大,地下水位较高,无现行案例可循.以场区岩土情况为出发点,从降低工程造价角度,在满足标准前提下,对抗拔 错杆进行了合理优化和改进.实践证明,错杆质量和抗拔力均可满足要求. [关键词]地下工程:抗拔错杆;设计;施工 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2014)21-0067-03 Design and Construction on Anti-pull Anchors of Large Substructure Mao Lixian' Zhang Linlin' Zhang Qiang' Ren Jia2 Qi Ji (1.Dalian Branch of China Construction Eighth Engineering Division Co.Lad.Dalian Liaoning 116021 China; 2.Dalian Henglong Real Estate Co.Ltd.Dalian Liaoning 116011 China) Abstract:The anti-pull anchors as a vertical anchoring technique show its superiority in the construction period and the cost of the project.With the large scale of the underground engineering and high level of underground water current case can't be followed.Based on geotechnical conditions of the area as a starting point the perspective of reducing project cost and meeting the standards the anti-pull anchors are optimized and improved reasonably.Practices show that the quality and anti-pull load can meet the requirements. Key words:underground;anti-pull anchor;design;construction 大连地区地下水位高,结构荷载不能有效地抵东西向长度约300m 南北向长度约196m.基坑最 抗地下水浮力时,需设抗浮结构.抗浮方法主要有 大开挖深度为27.470m 基坑侧壁安全等级为一级, 压重法、抗拔桩及抗拔错杆.压重法是通过增加底 重要性系数取1.1. 板的厚度来平衡水压力,但成本较高.抗拔桩需与 本场地上层土为第四季,在钻探深度内自上而 柱相连,使其间距较大,需较厚底板才能抵抗浮力 下依次为杂填土、粉质黏土、角砾.下层依次为全 产生的弯矩与剪力,其缺点为...
施工技术 2012年8月上 92 CONSTRUCTION TECHNOLOGY 第41卷第370期 大型地下储煤槽仓仓壁锚杆支护施工方法 杨圣扩 (中煤建安公司第七十三工程处,河北邯郸056001) [摘要]在大型地下储煤槽仓仓壁采用错杆进行支护,能够保证被错固土体的稳定.主要介绍了错杆支护特点、工 艺原理、操作要点和质量控制措施.该方法在多个项目成功应用,应用效果表明预应力错杆在边坡加固中应用,有 利于减少土方开挖和弃方量,减少用地面积,从而减少对周边环境的破坏.临时性仓壁支护错杆面层与永久性结 构仓壁合二为一,有效地缩短了施工工期,大大降低了工程投资. [关键词]地基;槽仓;锚杆;加固;施工技术 [中图分类号]TU755.2 [文献标识码]A [文章编号]1002-8498(2012)15-0092-04 Construction Technology of Anchor Support in Silo Wall of Large Underground Coal Storage Yang Shengkuo China Coal Building Installation 73 Engineering Co.Ltd.Handan Hebei 056001 China) Abstract:The silo wall in large underground coal storage is supported by anchor which can assure stability of the anchored soil.This paper introduces in detail the characteristics of anchor support technique principle key operating points and quality control measures.The anchor support method is used in several projects.The application effect shows that the application of anchor in slope reinforcement can reduce soil excavation and discarding soil decrease land use area and so as to reduce damage to surrounding environment.The temporary anchor support surface of silo wall also as permanent silo wall structure can effectively shorten construction period reduce project cost. Key words:foundation;silos;anchor;reinforcement;construction 利用现有地形采用高强钢筋预应力锚杆支护 2)喷锚钢筋混凝土面层主动支护土体,并与土 边坡,直接由错杆错喷面层作为储煤煤仓仓壁结构体共同工作,随挖随支,挖完支完,安全经济. 层,是最近几年西北地区主要煤炭基地大型地下储 3)喷锚混凝土面层和耐磨层直接形成永久性 煤槽仓仓壁经常采用的结构形式.在仓壁深基坑 仓壁,支护和仓壁合一,减小仓壁施工难度. 边坡防护中采用预应力高强钢筋锚杆,使结构与地 4)施工所需钻孔孔径小,不用...
施工技术 2011年1月 98 CONSTRUCTION TECHNOLOGY 第40卷第1期 大型厚层滑坡多锚点预应力锚索抗滑桩的优化设计 楚小刚,王引生 (中铁西北科学研究院有限公司,甘肃兰州730000) [摘要]提出在原错索柱桩身设置多错点预应力锚索抗滑柱的新结构形式,并利用有限元方法进行分析计算,提出 了寻求最佳锚点位置和错素承担滑坡推力最佳拉力取值范围的优化方法;通过工程造价比较,得出当锚索拉力系 数m值在22%~42%时,锚索抗滑桩总造价较低且趋于稳定,错索与抗滑柱受力达到最佳协调状态.在同等滑坡 推力作用下,多锚点预应力错索抗滑柱相比其他抗滑桩形式明显降低工程造价. [关键词]大型厚层滑坡;结构优化;多锚点预应力锚索抗滑桩 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2011)01-0098-03 The Optimum Method of Prestressed Anchor-wire Anti-slide Pile with Multi-anchored Points in Large-scale Thick Landslide Chu Xiaogang Wang Yinsheng (Northwest Research Institute Co.Lad.of C.R.E.C.Lanzhou Gansu 730000 China) Abstract:Structure of prestressed anchor-wire anti-slide pile with multi-anchored points set up in primary anchored pile is proposed.Based on FEM the authors put forward optimum method for searching the best anchor point position and tension value range of landslide thrust beard by anchor.By parison the total cost is tended to be stable and the foreed state of anchor and anti-slide pile is the best when anchor tension coefficient is at 20%~42%.At the equal landslide thrust prestressed anchor-wire anti-slide pile with multi-anchored points has obvious economic benefits. Key words:large-scale thick landslide;structure optimum;prestressed anchor-wire anti-slide pile with multi-anchored points 预应力错索抗滑桩是抗滑桩和锚索形成联合受佳取值范围. 力体系,当锚索与桩同时达到承受的最大设计内力1锚索拉力系数m 时,才能最大程度发挥锚索及抗滑柱的作用,造价也 锚索拉力系数m是铺索拉力水平分力与桩需 最为节省.若施加在桩上的铺索拉力太小,错索不 抵抗滑坡水平推力的比值,可表达为: 能有效地抑制桩的变位,锚点不能起到“支点”作 m=(Fncosa)/(KE S)(1) 用,使预...
2016年10月下 施工技术 第45卷第20期 CONSTRUCTION TECHNOLOGY 71 D0I:10.7672/5j52016200071 大型动臂内爬式塔式起重机附墙节点处墙体 受力特性试验研究 张晓,杨建江1,陈星2 (1.天津大学建筑工程学院,天津300072;2.中建二局西南分公司,重庆400020) [摘要]在超高层建筑施工中,大型动臂内爬式塔式起重机的安全性和稳定性十分重要,塔式起重机支撑系统对附 墙节点处墙体的影响更是其中亟需研究的课题.以实际工程为依托,通过现场试验测试,针对附墙节点处墙体在 塔式起重机作用下的受力特性进行研究.在对试验数据进行回归分析的基础上,得到埋件附近墙体有效影响宽度 与重物起升系数等参数. [关键词]高层建筑;钢结构;内爬式塔式起重机;附墙节点;支撑 [中图分类号]TU393.2 [文献标识码]A [文章编号]1002-8498(2016)20-0071-04 Study on Mechanical Properties of Attached Wall Affected by Large Boom Internal Climbing Tower Crane Zhang Xiao' Yang Jianjiang' Chen Xing (1.School of Ciril Engineering Tianjin University Tianjin 300072 China; 2.Branch of China Construction Second Engineering Bureau Co.Ltd.Chongging 400020 China) Abstract:The safety and stability of large boom internal climbing tower crane are very important in the construction of super high-rise buildings and it is urgent to solve the problem that how the tower crane' s supporting system affects the wall.This paper takes a project as the background the field experiments were designed to collect data by field test.According to the experiments some mechanical properties of attached wall have been researched such as the effective width of attachment wall and lifting coefficients. Key words:tall buildings;steel structures;internal climbing tower cranes;attached wall nodes;supports 0引言 长沙某超高层建筑建筑面积为1010462m2 主 目前.在超高层建筑施工中,大型动臂内爬式体塔楼设计高度452m 地上92层,采用内部核心筒 塔式起重机已经成为垂直运输设备的主流选择, 与外部巨型框架组合的结构形式,其中核心筒内底 由于自重和额定起重力矩均较大,塔式起重机对附层采用钢板混凝土组合剪力墙结构,外框柱...
[关键词]屋面工程;斜屋面;大坡度;滑移;施工技术 [中图分类号】TU765 [文献标识码]A [文章编号]1002-8498(2016)03-0088-03 Anti-slidingConstructionTechniquesofStructuralLayer ofLargeSlopeInclinedRoofs ShiQunkai,FanZuofeng,DuanYanhui,LuGang,YangQian (China MCC20 Group Co.,Ld. ,Shanghai 201999, China) Abstract:Starting from the true sample of sloping roof's slide in No.2and No.3buildings of Zhangzhou photoelectric vocational and technical college,construction techniques and encountered problems on large slope inclined roof conformation are analyzed.What's more, this paper also makes a summary about the measures, construction process. The results show that the treatments get good effects. Key words:roofs;inclined roofs;large slope; slipping;construction 1工程概况 积开裂等现象。
施工技术 2016年11月下 22 CONSTRUCTION TECHNOLOGY 第45卷第22期 D01:10.7672/gjs2016220022 大坡度斜井盾构施工壁后填充技术研究* 杨俊哲,邱承有2 (1.神华神东煤炭集团有限责任公司,陕西榆林719315;2.中铁十一局集团有限公司,湖北武汉430061) [摘要]大坡度斜井盾构施工过程中,由于受坡度的影响,管片壁后填充材料流向开挖掌子面,导致浆液流失,严重 时导致管片壁后填充质量差等问题.从浆液特性分析、室内模型试验与现场实施方案等方面着手,分析了管片壁 后填充层对管片结构防水性能的影响,研究了高水压状态下管片壁后填充层与管片结构共同防水的作用机理.根 据斜井连续下坡、大埋深、超长的工程特点,结合神华神东补连塔煤矿斜井工程地质情况,开展了管片壁后填充施 工工艺及分段注浆封堵形式的系统研究,形成了煤矿斜井盾构管片壁后填充综合技术. [关键词]盾构:大坡度;斜井:壁后填充;施工 [中图分类号]TD265 [文献标识码]A [文章编号]1002-8498(2016)22-0022-03 Technical Study on Filling the Shield Tunneling Construction After Steep Inclined Shaft Yang Junzhe' Qiu Chengyou2 (1.Shenhua Shendong Coal Refco Group Lad.Yulin Shaanxi 719315 China; 2.China Raileay No.11 Construction Bureau Group Co.Ltd.Wuhan Hubei 430061 China) Abstract:Steep inclined shaft shield construction process due to the influence of the slope the segment wall filling material to the excavating face may lead to loss of slurry segment filled with issues such as the poor quality.In this paper the slurry characteristics of indoor model tests and field implementation and other aspects analyzes the influence on the wall segment after filling layer waterproof performance of the segment structure studied under high pressure condition after filling wall segment mechanism of waterproof layer and segment structure.According to the engineering characteristics of deep buried long continuous downhill slope with Shenhua Bulianta coal mine slope engineering geological conditions the system of filling construc...