2017年8月下 施工技术 第46卷第16期 CONSTRUCTION TECHNOLOGY 117 D0I:10.7672/8js2017160117 无线应力监测技术在杭州东站工程中的应用 徐拥建,沈西华,许四林,王炀,叶昔龙 (浙江省建工集团有限责任公司,浙江杭州310012) [摘要]杭州东站工程施工过程中,采用无线应力监测技术对杭州东站重点部位的应力进行了监测,对监测数据进 行了分析,并与设计值进行了比较.与传统应力监测技术进行比较,无线应力监测技术具有安全、便捷和数据完整 的特点. [关键词]火车站;应力;监测;贝雷架;正线桥;结构安全 [中图分类号]TP277 [文献标识码]A [文章编号]1002-8498(2017)16-0117-05 Application of Wireless Stress Monitoring Technology in Hangzhou East Railway Station XU Yongjian SHEN Xihua XU Silin WANG Yang YE Xilong Zhejiang Construction Engineering Group Co.Lad.Hangzhou Zhejiang 310012 China) Abstract:During construction of Hangzhou East Railway Station the key parts of Hangzhou East Railway Station were monitored by using wireless stress monitoring technology.The monitored values were analyzed and pared with the design ones.Comparing with traditional stress monitoring technology the wireless stress monitoring technology has characteristics of safety convenient and plete data. Key words:railway stations;stress;monitoring;Bailey truss;main track bridge;structural safety 0引言 2方案选择和案例分析 无线应力监测技术是建筑业近几年来兴起的2.1方案1:采用传统读数记录 一种保证施工过程中结构安全的一种新技术.本 首先选择监测的对象是碗扣式支模架体系,以 文针对无线应力监测技术在杭州东站重点部位的 记录上方混凝土浇捣前、浇捣过程中和浇捣完成后 应用所的直接数据加以论证和分析,并与传统 的支模架体系关键部位承受荷载的数据. 的应力监测技术进行比较,联系实际问题进行讨 2.1.1案例1:出租车通道混凝土浇捣 论,使之在以后其他工程能得到更高效的应用. 实施时间为2011-02-14—2011-02-18;监测对象 1工程概况 为出租车通道B区联系通道(⑨~①轴/E轴) 新建杭州东站扩建工程东站位于杭州市江干 2100mm×2600mm梁,采用传统的应力监测盘和 区,站区周边有沪杭甬高速、德胜快速路、良山东 应力读数器进行监测.在梁中,两边和梁底各选择 路、环站北路、环站南路、机场路等城市道路.站 1个监测点.通过监测发现,3个监测点的数据在两 房位于新风东路以东、天城路以南...
2011年12月上 施工技术 第40卷第354期 CONSTRUCTION TECHNOLOGY 61 无砟轨道水泥乳化沥青砂浆泵送 施工技术的研究与应用 刘竞,郑新国1,韩志强2,林茂2,曾志,翁智财,崔鑫,张景辉2 (1.中国铁道科学研究院铁道建筑研究所,北京100081; 2.中国水利水电建设集团公司,北京100048) [摘要]针对吊车吊装中转运输砂浆的各种弊端,通过泵机选型、管路设计、现场调试与应用等,研发出适用于水泥 乳化沥青砂浆大规模快速施工的泵送设备及工艺.该泵送设备可直接采用砂浆搅拌车的备用电源,不需外接电 源,使用方便,操作简单,容易清洗,故障率低;泵送时对砂浆性能影响较小,泵送效率高、运距远,适于桥梁、路基、 隧道等各种施工工况.现场应用情况表明,该泵送技术能大幅提高施工效率,创下单日正线灌注141块轨道板的 纪录;同时节省人力物力,减少材料浪费,降低工程成本,促进文明施工. [关键词]高速铁路;水泥乳化沥青砂浆;泵送;施工技术;设备 [中图分类号]U213.244 [文献标识码]A [文章编号]1002-8498(2011)23-0061-04 Pumping Technology Research and Application of Cement Emulsified Asphalt Mortar in Ballastless Track Liu Jing' Zheng Xinguo' Han Zhiqiang? Lin Mao2 Zeng Zhi' Weng Zhicai' Cui Xin' Zhang Jinghui2 (1.Railway Construction Institute China Academy of Railway Sciences Beijing 100081 China; 2.Sinohydro Corporation Beijing 100048 China) Abstract:Considering the disadvantages of crane lifting transfer transport for mortar the pumping equipment and technology for rapid large-scale construction of cement emulsified asphalt mortar are developed by pump selection pipeline design field debugging and application and so on.The pumping equipment can directly use the power of mortar mixer no external power supply easy to use and clean simple operation low failure rate less influence on mortar high pumping efficiency long transmission distance away suitable for bridges roadbed tunnels and other construction conditions.Field application shows that the pumping technology can significantly improve construction ef...
[关键词]水泥;无熟料高炉矿渣水泥;电通量;抗渗 [中图分类号】TU528.04;TQ172[文献标识码】A[文章编号】1002-8498(2012)22-0052-03 TheCIImpermeabilityofNon-clinkerSlag'CementConcrete Piao Yingmo',Qin Yi² (1.Building Material Research Department of Eastern Liaoning University,Dandong,Liaoning 118003,China; 2. Department of Ciuil Engineering of Eastern Liaoning University,Dandong,Liaoning 118003,China) Abstract; Non-clinker slag cement (NSC)concrete has unique CI" impermeability.To research on that, non-clinker slag cement concrete was prepared with gypsum and lime as the excitant, and impermeability experiments for Cl° were performed using the electric flux method. The test materials, concrete mix proportion,testing method were introduced and test results reported. The results show that NSC's impermeability is far beter than Porland cement and slag cement. Key words;cement;non-clinker slag cement (NSC);electric flux; impermeability
0引言450℃(ⅡI型无水石膏,简写APG)和80℃(二水石 无熟料高炉矿渣水泥(NSC)的主要胶凝材料是膏,简写DPC)中进行干燥处理。
2010年4月 施工技术 第39卷第4期 CONSTRUCTION TECHNOLOGY 79 无毒性(AC-Ⅱ)丙烯酸盐灌浆液的研究与应用 何月巍,谭日升,何跃峰 (北京朗时代科技有限责任公司,北京100022) [摘要]AC-Ⅱ丙烯酸盐灌浆液是一种新的防渗堵漏材料.它用一种新的交联剂,替换第一代丙烯酸盐满浆液中的 交联剂甲撑双丙烯酰胺,更符合环保要求.经检测,新型A-Ⅱ丙烯酸盐燕浆液无毒,并给出了浆液凝胶时间的控 制和凝胶的性质.经与国外同类先进产品比较,其具有优良的性质,并已成功应用于地铁、水电站、民建等防滤堵 漏项目中,效果良好. [关键词]AC-Ⅱ丙烯酸盐灌浆液:无毒:检测;防漆堵漏;环保 [中图分类号]TU578 [文献标识码]A[文章编号]1002-8498(2010)04-0079-04 Study and Application of Non-toxic Acrylate Grouting Liquid He Yuewei Tan Risheng He Yuefeng Beijing Langwei Time Science and Technology Co.Ld.Beijing 100022 China) Abstract:AC-II acrylate grouting liquid is a new kind of seepage and plugging material which uses a new kind of crosslinking agent to instead of methylenebisacrylamine to meet environment protection requirement.By detection the new AC-II acrylate grouting liquid has no toxicity and the control for gel time and gel performance of slurry are indicated.Through parison with foreign similar advanced product it has excellent properties and has been applied in seepage and plugging engineering of subway hydropower station and civil buildings. Key words:AC-II acrylate grouting liquid;non-toxic;detection;seepage and plugging;environment protection 丙烯酸盐化学灌浆材料的研究和应用始于2世体一一交联剂;③能引发上述单体聚合的引发剂;④能 纪40年代,由美国海军和马萨诸塞工科大学在军事方和引发剂反应产生自由基引发单体聚合的促进剂;⑤ 面首次试用于加固地基.当时由于丙烯酸不能大量生能延长聚合反应诱导期的缓凝剂.丙烯酸盐和交联剂 产,材料来源困难,未能广泛应用.70年代后,丙烯酸 是形成高分子的材料,统称主剂. 盐化学灌浆材料成为国际上通用的化学灌浆材料.但1.1丙烯酸盐的合成 是丙烯酸盐化学灌浆材料使用的交联剂,都是丙烯酰 丙烯酸盐是由丙烯酸和金属氧化物或金属氢氧化 胺化学灌浆材料的交联剂甲撑双丙烯酰胺,该化合物 物通过中和反应合成的,此次研究是在其中添加了一 的毒性LD(半数致死剂量)为390mg...
2013年8月下 施工技术 第42卷第16期 CONSTRUCTION TECHNOLOGY 75 D0I:10.7672/sgj82013160075 无框干挂石材灌注保温砂浆技术在某工程的应用* 杜书廷 (许昌学院土木工程学院,河南许昌461000) [摘要]基于使用功能及节能需要,对某既有办公建筑进行装饰节能一体化改造,考虑保温层的设置和砖墙不宜安 装钢骨架等因素,采用无框干挂石材灌注保温砂浆技术进行处理.详细分析了无框干挂石材灌注无机保温砂浆外 墙保温装饰一体化技术的构造和材料性能要求,并对其具体施工流程及验收标准等方面作了详细介绍. [关键词]保温;节能;砂浆;石材幕墙;安装 [中图分类号]TU767 [文献标识码]A [文章编号]1002-8498(2013)16-0075-04 Application of Thermal Insulation Mortar Perfusion with Frameless Dry Hanging Stone in a Project Du Shuting (School of Civil Engineering Xuchang University Xuchang He'nan 461000 China) Abstract:Based on the requirements of using function and energy-saving the integrated transformation with decoration and energy-saving is made to a existing buildings considering the functions of insulation and the brick wall the technology of thermal insulation mortar perfusion with frameless dry hanging stone is adopted.The author analyzes and introduces the structure materials construction process and acceptance standard. Key words:insulation;energy-saving;mortar;stone curtain wall;installation 1工程概况 2技术构造 该办公楼位于郑州市某中学,建成于1985年,2.1构造层次 主体结构为5层砖混结构,层高为3.3m 建筑高度 构造层次如图1所示.基层墙体为原有的 17.2m 建筑面积为3128.75m2 抗震设防烈度为7240mm黏土砖墙,原饰面层为约22mm厚水泥砂 度,外墙为240mm厚黏土砖墙,内饰面为约15mm 浆;界面层为2~3mm厚的保温专用界面砂浆,保温 厚混合砂浆及内墙涂料,外饰面为约22mm厚的水 层采用70mm厚灌注膨胀玻化微珠保温砂浆;第2 泥砂浆,基础为混凝土垫层砖砌条形基础. 层界面层为喷涂于面板背面1~2mm厚保温专用界 基于单位用房和节能降耗需要,2011年5月开 面砂浆;饰面板为干挂天然花岗石板材,采用化学 始对该办公楼进行装饰与节能一体化改造.由于 锚栓和带断热构造的金属干挂件固定于基层上,干 单位要求外墙改造为天然花岗岩石材饰面,同时考 挂件由L形不锈钢弯板和T形不锈钢插板组成,二 虑保温层的设置以及现有砖墙上不宜安装钢骨架 者用不锈钢螺栓固定,插板销钉插入石板槽内并注 等因素,故饰面构造采用了无框干挂石材面板,即 入环氧结构胶. 将石材面板通过干挂件直接与基层相连.基于耐 2.2局部构造处理 久性、防火性、系统整体安全等因素,结合干挂石材 窗洞上下口处理如图2所示,顶部面板和窗台 构造特点,保温层做法采用了在石材面板与基层墙 面板靠内侧端部开短平槽,靠外侧板背面开短平 体之间的空腔内灌注无机保温砂浆,使整个构造形 槽,采用干挂件固定于基层后,空腔内灌注保温砂 成了保温装饰一体化体系. 浆,面板与窗框之间的缝隙内填泡沫塑料棒,然后 用耐候密封胶嵌填并抹成弧形.外墙勒脚部位构 *2012年度河南省重点科技攻关项目(122102310398);2010年度 造处理如图3所示,最底层石材面板下部采用L形 河南省教育厅自然科学研究计划项目(2010B560014) 【作者简介]杜书廷,副教授,E-mail:dst_xiao@163 插板固定,板底到散水表面留出10~15mm的空隙, [收稿日期]2013-04-12 万方数据 76 施工技术 第42卷 增强材料以及其他功能添加剂组成,按一定比例混 墙体基层 原有饰面砂浆 合而成的干混材料,在施工...
2015年9月下 施工技术 第44卷第18期 CONSTRUCTION TECHNOLOGY 19 D0I:10.7672/5j52015180019 无机发泡隔墙板的制备及性能研究 张玉,李珠,马钢 (太原理工大学建筑与土木工程学院,山西太原030024) [摘要]提出了满足规范要求的A级防火无机保温隔墙板材料制备方法.在发泡保温材料中掺加了含有增强、防 水、泡体调节等功能的复合改性成分,研究了不同改性成分与无机发泡隔墙板发泡量、导热、密度、力学性能以及吸 水率的关系,并对基体内部的传力途径进行优化,得到力学性能、传热性能都较为优良的配方. [关键词]建筑材料;隔墙;发泡;导热系数 [中图分类号]TU55 [文献标识码]A [文章编号]1002-8498(2015)18-0019-04 Study on the Preparation and Properties of Inorganic Foam Insulation Wall Zhang Yu Li Zhu Ma Gang College of Architecture and Civil Engineering Taiyuan University of Technology Taiyuan Shanxi 030024 China) Abstract:This study proposes a preparation method of inorganic foam insulation wall board with grade A resistance rating which meet the specification requirements.By adding pound modified position with functions of additional strength waterproof and bubble adjustment in the inorganic foam insulation wall board its internal foree matrix way is optimized mechanical properties production and construction technology have been improved and the relationship between different pound modified ponents and properties of inorganic foam insulation wall board have studied such as foaming capacity thermal conductivity density mechanical properties and water absorption.And the remended usages of pound modified ponent are given. Key words:building materials;insulation wall;foaming;thermal conductivity 0引言 度砌体质量的五分之一,大大降低了结构造价,装 轻质节能墙材导热系数低,作内围护结构使用配式施工更加简单便捷. 时,具有以下优点:①不用辅助保温材料就能满足1试验 我国节能保温要求,且防火等级达到国家A级标1.1原材料技术要求 准.产品两面内贴高强纤...
[关键调】钢结构;体育场;倾斜钢柱;安装;稳定性;施工技术 [中图分类号]TU745.2 [文献标识码]A [文章编号]1002-8498(2017)06-0115-03 Construction Technology Research and Application of InclinedSteelColumnInstallationWithoutSupport Zheng Guangsheng',Li Yumei²,Wang Hui',Wan Min (1.Inner Mongolia Xingtai Construction Group Co.,Ltd.,Erdos,Iner Mongolia 017010,China; 2.OrdosCity ConstructionEngineering Quality Surveillance,Erdos,Inner Mongolia017010,China) Abstract:Based on the technical problems of inclined column installation without support in Erdos City Sports Center Stadium, this paper analyzed the unstable system of inclined steel column. Construction technologies which can ensure the stability of steel columns in the installation process,safety,and enhance the overall overturning resistance of the structure are introduced in detail. Key words:steel structures; stadiums;inclined steel column; installation; stability;construction 1工程概况 鄂尔多斯市体育中心体育场项目位于鄂尔多 斯市康巴什新区(见图1),主体结构为框架-抗震墙 体系,核心筒、看台斜柱为钢结构-钢筋混凝土劲性 结构,核心筒与水平面成75°倾角,看台斜柱与水平 面成70°,结构最高处达78m。
[关键词]支撑结构;无剪刀撑框架;承载力;稳定性;研究 [中图分类号]TU731.1 [文献标识码]A:[文章编号】1002-8498(2016)02-0115-06 CalculationMethodResearchofFrameSupport StructureStabilityWithoutX-bracing LuoYaozhi,XieJunqiao,ZhengYanfeng (Space StructureResearch Center,ZhejiangUniversty,Hangzhou,Zhejiang 310058,China) Abstract:Through non-linear finite element analysis,the effects of erection parameters on stability capacity of frame support structures without X-bracing are studied.Combining with the work on Technical code for temporary support structures in construction JGJ300-2013,calculation methods of stability capacity of frame support structure without X-bracing are proposed.The effective length factors are calculated by three dimensionless parameters K,α,n,,and the putation tables for efective length factors are obtained.Meanwhile, the effect of lateral restraint is also analyzed.Correction coefficient considering lateralrestraint isput forward,and the reliable values of this correction coeficient are given under some certain conditions. Key wordssupports;frame support without X-bracing;bearing capacity; stability;research 0引言 于无剪刀撑框架式支撑结构,若不考虑节点刚度, 当上部传递荷载小、所需搭设高度较低时,工则支撑结构整体是可动的,若视为刚接,则会因过 程中常可采用无剪刀撑框架式支撑结构。
2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY 45 D0I:10.7672/sjs2015040045 旋转移位工程中弧形轨道内力有限元分析* 吴二军,郭现收 (河海大学土木与交通学院,江苏南京210098) [摘要]建筑物整体旋转移位工程中的弧形轨道是处于压力、弯矩、剪力和扭矩共同作用下的复合受力构件,其内 力分析和设计尚无成熟的方法.结合福建濠景大厦旋转移位工程,采用有限元分析软件ANSYS建立弧形轨道模 型,分析了竖向荷载大小、轨道半径、竖向荷载作用位置偏差、水平力方向偏差等因素对弧形轨道内力的影响,对弧 形轨道的设计和旋转移位工程的施工提出了几点建议,为轨道合理设计和施工提供参考. [关键词]旋转移位;弧形轨道;有限元分析;内力分析 [中图分类号]TU312 [文献标识码]A [文章编号]1002-8498(2015)04-0045-04 Finite Element Analysis of Curved Track in Rotation Transportation Project Wu Erjun Guo Xianshou College of Civil and Transportation Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:Because curved track in horizontal rotation transportation project of the whole building is plex loading member under the effect of pressure bending moment shear force and torque there is no mature method for mechanical analysis and design.Combined with the twice rotation and transportation project of Haojing Building in Fujian province authors established curved track model by using the finite element analysis software ANSYS and analyzed the influence on the internal force of curved track by vertical load radius of track position deviation of the vertical load and direction deviation of the horizontal load.Based on the analysis several suggestions were put forward that can provide reference for reasonable design of curved track and construction of rotation transportation project. Key words:rotation transport;curved track;finite element analysis;internal force analysis 近年来,需要改变建筑物朝...
[关键词】脚手架;旋转盘式扣件;临时支撑架;施工技术 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2015)17-0074-05 ResearchandApplicationofTemporarySupportFrame forRotatingFastener Li Guoyao,Li Qinshan,Wang Yuan,Hou Zhiyong (PingmeiShenmaConstruction Engineerng Group Co.Ld.,Pingdingshan,He'nan46700,China) Abstract;This paper introduces the rotating fastener support system, which can be assembled into truss, grid and other spatial grid structure to meet the construction requirements for temporary support system. Through the calculation and load test of rotating fastener grid,this paper establishes an accurate calculation model. By applying the case,a detailed process of its construction and use is introduced. Key words:scaffolds;rotating fastener;temporary support frame;construction 1旋转盘式扣件临时支撑架组成 跨度装配式桁架桥梁或承载平台,如图1所示。
2013年7月上 施工技术 第42卷第13期 CONSTRUCTION TECHNOLOGY 27 D0I:10.7672/sgjs2013130027 旋挖钻机方形桩施工技术 陈以田,呼锋2,李晓亮2,罗菊2,赵克勋3 (1.中国矿业大学机电学院,江苏徐州221116;2.徐州徐工基础工程机械有限公司,江苏徐州221004; 3.河南平普科技有限公司,河南郑州450000) [摘要]结合南水北调中线一期工程南阳段方形挡土柱工程实际,提出了一种旋挖钻机方形钻头设计方案及施工 技术.该旋挖钻机方形钻头在应用中具有稳定可靠、效率高、成桩质量好等优点,同时扩展了旋挖钻机的施工工 艺,为越来越多的特殊桩基础工程施工提供了一种思路. [关键词]地下工程;桩;旋挖钻机;方形桩;南水北调 [中图分类号]TU753.3 [文献标识码]A [文章编号】1002-8498(2013)13-0027-03 Construction Technology of Rectangular Piles by Rotary Drilling Rig Chen Yitian Hu Feng2 Li Xiaoliang,Luo Ju2 Zhao Kexun3 (1.School of Mechatronic Engineering China University of Mining and Technology Xuzhou Jiangsu 221116 China; 2.Xuzhou Xugong Foundation Engineering Machine Co.Ltd.Xuzhou Jiangsu 221004 China; 3.He'nan Pingpu Science and Technology Co.Ltd. Zhengzhou He'nan 450000 China) Abstract:Combined with rectangular piles engineering of the first-stage project in mid-route of south-to- north water diversion in Nanyang this paper proposed a design of rectangular drilling tool of rotary drilling rig and construction technology.The rectangular drilling tool is used with good reliability high efficiency and good quality which creates appreciable benefit.At the same time it extends the construction technology of rotary drilling rig and provides a thought for special project of pile foundation in the future. Key words:underground;piles;rotary drilling rig;rectangular piles;south-to-north water diversion 旋挖钻孔桩采用膨润土泥浆护壁,旋挖钻斗取圆形,主要用于圆柱桩孔的施工.当旋挖钻机用户 土,是广泛应用的桩基施工方法.旋挖成孔具有振遇到方形桩工程时,现有的旋挖钻机钻头...
2013年2月下 施工技术 第42卷第4期 CONSTRUCTION TECHNOLOGY 85 D0I:10.7672/sgjs2013040085 旋挖钻机入岩空气冲洗钻进技术 王国辉,张春来,林明赫,郑成果 (河北建设察研究院有限公司,河北石家庄050031) [摘要]旋挖钻机人岩空气冲洗钻进技术利用牙轮以剪切破岩和冲击破岩为主、破岩效率较高的特点,通过将岩芯 钻的破岩截齿更换为牙轮,提高了破岩效率,降低了钻进时钻头旋转摩擦产生的热量,减缓了钻头破岩刀具的磨 损.通过引入压缩空气循环系统和对开式沉渣管岩芯钻头,实现了钻头的冷却和不间断排清钻进.试验表明,旋 挖钻机人岩空气冲洗钻进技术提高钻进效率1倍以上,为旋挖钻机入岩钻进开辟了一种新途径. [关键词]建筑机械;空气冲洗工艺;旋挖钻机;人岩钻进;破岩方式 [中图分类号]TU624 [文献标识码]A [文章编号]1002-8498(2013)04-0085-04 The Bedrock Drilling Technology of Rotary Drilling Rig with Air Flushing Wang Guohui Zhang Chunlai Lin Minghe Zheng Chengguo Hebei Research Institute of Construction and Geotechnical Inuestigation Co.Ld.Shijiazhuang Hebei 050031 China) Abstract:The chief rock fragmentation methods of roller-bit are by shearing and impacting and its rock fragmentation efficiency is higher.By replacing the drill bullet-type cutter with roller-bit-core the bedrock drilling technology of rotary drilling rig with air flushing method improves the rock fragmentation efficiency and reduces the heat generated by the drilling bit rotation friction which also slows down the wear-and-tear of the drilling bit.With the introduction of pressed air circulation system and the two- way open roller-bit-core drill with drilling residue collecting vessel the drill bit can cool down and enable continuous slag discharge in the process of drilling.Experiment shows that the bedrock drilling technology of rotary drilling rig with air flushing method can improve the drilling efficiency by over one time and sta...
施工技术 2014年10月上 48 CONSTRUCTION TECHNOLOGY 第43卷第19期 D01:10.7672/sgjs2014190048 旋挖钻孔桩沉渣产生原因及清孔工艺优化选择 雷斌,叶坤,李榛,柴源 (深圳市工勘岩土工程有限公司,广东深圳518026) [摘要]随着旋挖钻孔灌注桩的广泛应用,桩底沉渣过厚成为突出的质量通病.结合旋挖钻孔灌注桩的施工实践, 分析了桩底沉渣过厚产生的原因,介绍了6种泥浆正循环、反循环、无循环清孔工艺和方法,并对比分析了各种清 孔工艺的特点,提出了旋挖桩清孔工艺的优化选择方法. [关键词]桩;旋挖钻孔桩;沉渣;清孔;施工工艺;优化 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2014)19-0048-06 Causes of Sediment at the Bottom of Rotating Drilling Pile and Optimal Selection of Hole Cleaning Method Lei Bin Ye Kun Li Zhen Chai Yuan Shenzhen Gonghan Geotechnical Engineering Co.Lad.Shenzhen Guangdong 518026 China) Abstract:With the widely applieation of the rotating drilling pile the overweighting sediment at the hole bottom is being one of the most prominent quality problems.This paper has analyzed the causes of the overweighting sediment at the hole bottom which is based on the author's construction practice experience of working on rotating excavation drilling cast-in-place pile.In addition it also introduces six holes cleaning methods including the slurry direct circulation slurry reverse circulation non-cycle and so on.And by the parison analysis of all the hole cleaning methods the authors give an optimal selection method of cleaning process in the rotating excavation drilling pile. Key words:piles;rotating drilling pile;sediments;hole cleaning;construction;optimization 0引言 编制相关旋挖钻孔桩施工技术规范,仍未形成系统 随着旋挖钻机整体性能的提升以及旋挖钻具的工法研究,施工过程中大量的旋挖成桩质量问题 的不断改进,旋挖钻孔桩已广泛应用于桩基础工程 也随之产生,桩底沉渣过厚即是较普遍的质量通病 施工.据不完全统计,目前在深圳及周边地区使用之一.桩底沉渣超标或过...
施工技术 2016年2月上 12 CONSTRUCTION TECHNOLOGY 第45卷第3期 D0I:10.7672/sgj82016030012 旋挖桩成孔钻速影响因素回归分析 程瀛,邵泉,李敏健,陈洋洋2 (1.广州市第一建筑工程有限公司,广东广州510060;2.广州大学工程抗震研究中心,广东广州510500) [摘要]根据宏城广场基坑项目APM中央工程桩的地质超前钻,对宝峨旋挖机钻进速度的差异性进行研究,通过 回归分析,得到钻进速度与岩层(土层)厚度、岩石埋深、岩石RQD值及岩石强度值之间的相互关系,并分析原因提 出处理措施,合理组织施工. [关键词]桩基工程;旋挖桩;钻速;施工机械;回归分析;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2016)03-0012-04 Regression Analysis of Factors Affecting the Speeds of Rotary Drilling Hole Drilling Cheng Ying' Shao Quan' Li Minjian' Chen Yangyang (1.Guangzhou First Construction Engineering Co.Ltd.Guangzhou Guangdong 510060 China: 2.Earthquake Resistant Research Center of Guangzhou University Guangzhou Guangdong 510500 China) Abstract:Taking the foundation construction of Guangzhou Hongcheng Plaza as an example and according to the geology of the rock's advanced drilling in the area of Guangzhou metro's APM line the variability of drilling speeds of Bauer rotary drilling rig are taken account the regression analysis is applied to gain the relationships between the drilling speeds and such factors as thicknesses depths values of RQD and strengths then the related construction reasons are raised and some strategies are suggested. Key words:pile foundations;rotary digging piles;drilling speed;construction machinery;regression analysis;construction 随着施工机械工业的进步,越来越多的新型机城旅客自动输送系统)上方(见图1).该基坑采用 械运用于灌注桩的成孔,结合正、反循环的旋挖钻 的支护类型有:排桩(冲孔桩或旋挖桩)、立柱桩、地 进广泛应用于桩基工程. 下连续墙、内支撑、锚索和微型钢管桩,这些支护类 采用正循环旋挖钻进,提、下钻具会对孔壁形 型组合形成各种形式的支护体系. 成抽吸和挤压;而采用反循环旋挖钻进,桩...
施工技术 2012年4月上 10 CONSTRUCTION TECHNOLOGY 第41卷第362期 旋喷锚桩在软土地区超大深基坑中的应用 周予启,刘卫未,刘芳 (中建一局集团建设发展有限公司,北京100102) [摘要]天津嘉里中心基坑开挖深度17m 周边环境复杂(津滨轻轨地铁距离基坑30m).为满足项目开发进度需 要,采用旋喷错桩施工技术替代原设计中心岛法边撑.利用旋喷和搅拌工艺在软土地区中形成大直径错固桩体, 达到增加错固体抗拔力的效果,并可以有效地改良土体,提高土体自身抗剪强度.通过数值模拟手段,制定了施工 工艺参数和完善施工流程.施工监测结果表明,旋喷铺桩技术的应用保证了地铁隧道的变形安全,成功解决了错 固技术在软土地区难以适用的难题. [关键词]地下工程;深基坑;旋喷错桩;软土;数值模拟;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2012)07-0010-04 Application of Rotary Churning Pile Construction Technology for Super Large Deep Foundation Excavation in Soft Soil Area Zhou Yuqi Liu Weiwei Liu Fang China Construction First Division Group Construction Development Co.Lad.Beijing 100102 China) Abstract:In foundation excavation of Tianjin Kerry Center the depth is 17m.Its surrounding environment is plex with a distance of 30m to Jinbin Light Rail.To meet the needs of project development central-island method is replaced by rotary churning pile construction technology.The large-diameter anchor piles with process of rotating and mixing in the soft soil effectively increase the anti-pull strength of anchorage body and improve the shear strength of soil.By means of numerical simulation the construction parameters are formulated and the construction process is improved. Construction monitoring results show that the application of rotary churning pile ensures the safety of subway tunnel successfully solves the problem that anchoring technology is difficult to apply in the soft soil and provides a reference for design and...
施工技术 2016年10月上 10 CONSTRUCTION TECHNOLOGY 第45卷第19期 D01:10.7672/sjs2016190010 旋喷深搅组合桩止水帷幕技术在海岛深基坑 施工中的应用 温彦岭,雷逢胜,王磊 (中国人民解放军63926部队,北京100192) [摘要]海岛地质环境下深基坑施工,面临地下水丰富、水压大、土体强度高等难题.为妥善解决上述问题,在海南 某工程深基坑施工中,采用了全新的三轴搅拌桩与高压旋喷桩结合的止水帷幕形式,有效地垂直阻断地下水流,开 发了一种海岛条件下深基坑止水帷幕施工的新工艺. [关键词]深基坑;海岛;深搅旋喷组合桩;止水帷幕;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2016)19-0010-03 Application of SMW-jet Pile Combination Method Used in Deep Foundation Excavation of Island Geological Environment Wen YanLing Lei Fengsheng Wang Lei The 63926 Troop of Chinese People's Liberation Army Beijing 100192 China) Abstract:High permeable soil and large pressure groundwater are difficulties in deep foundation excavation construction of island geological environment.Compared with the existing construction method the SMW-jet pile bination method of waterproof curtain has the advantages of short duration and low cost and it is a efficient way. Key words:deep foundation excavation;islands;SMW-jet pile;waterproof curtain;construction 0引言 的应用前景;同时,创新止水帷幕施工工艺,对促进 止水帷幕是通过垂直阻断地下水通道,使降水 我国特殊地质条件下基坑止水开挖技术的发展具 后基坑处于无水或少水状态,在基坑开挖和后续基有重要意义. 础施工过程中确保施工安全的防护设施.目前,国1工程概况 内常用的非桩类止水结构主要有冻结法、注浆法、 位于海南文昌的某国家重点工程,毗邻南海 高压喷射注浆法、水泥土搅拌法等形式.止水帷幕 (约800m) 场地地下水丰富,上部地层属第四纪海 的工艺选型不仅直接影响施工费用,而且是基坑施 相沉积物.该工程基坑长168m 基底宽26.4~ 工成败的关键,因而备受各建设主体单位关注. 34.6m 基坑最深部位为-25.350m.场地自上而下 在我国沿海地区,水泥搅拌桩和高压旋喷桩是 分别为填土、细砂、含砂珊瑚碎屑、强风化及中风化 应用较为广泛的止水帷幕形式,但单一水泥搅拌桩 花岗岩层,基坑-13.200~-15.500m以下位于中 和高压旋喷桩在成桩质量或工程成本等方面均存 风化花岗岩层中;场地地下水水位常年接近地表, 在较大的局限性.深搅旋喷组合桩是一种全新的 含水层主要为层间孔隙潜水,各...
2015年8月上 施工技术 第44卷第15期 CONSTRUCTION TECHNOLOGY 11 D0I:10.7672/8js2015150011 新郑国际机场T2航站楼高密度大直径梁钢筋绑扎 整体升降施工技术 贺红星,王亚桥,黄挡玉,王兴龙,谢亚辉 (中建三局集团有限公司工程总承包公司,湖北武汉430070) [摘要]郑州新郑国际机场T2航站楼与下穿城际铁路交叉区段有14条混凝土转换大梁,梁长54m 最大截面 1800mmx5000mm.为满足施工进度和质量需要,介绍了一种高密度大直径钢筋整体吊装体系设计和施工方法, 在已提升槽钢地梁面绑扎钢筋,下部留设箍筋安装空间,达到先绑扎主筋,后绑扎箍筋,最后再绑扎腰筋的目的,钢 筋成型后通过联排手拉葫芦整体逐步下放就位.整个升降体系受力合理,简化施工工序,提高施工效率,钢筋定位 质量高,混凝土成型美观,各项指标均满足规范要求. [关键词]机场:航站楼;混凝土;钢筋:整体升降系统 [中图分类号]TU755.33 [文献标识码]A [文章编号]1002-8498(2015)15-0011-03 Banding and Integral Lifting Technology of High Density and Large Diameter Beam Steel Bars in Xinzheng International Airport Terminal T2 He Hongxing Wang Yaqiao Huang Dangyu Wang Xinglong Xie Yahui General Contraction Company of CCTEB Wuhan Hubei 430070 China) Abstract:There exist 14 concrete transfer beams at the cross section between the Zhengzhou Xinzheng International Airport terminal T2 and intercity railway with the beam length of 54m and the maximum section of 1 800mm x 5 000mm.In order to meet the requirements of the schedule and construction quality this paper introduces a kind of design and construction method about monolithic hoisting system of high density and large diameter steel bars.The new method is assembling steel bars on the top of lifted channel-steel grade beams indwelling the stirrups installation space at the bottom to achieve the purpose of assembling the main steel bars first and assembling stirrups latter and setting web steel bars finally and putting down the monolithic reinforceme...
施工技术 2015年8月上 14 CONSTRUCTION TECHNOLOGY 第44卷第15期 D0I:10.7672/8js2015150014 新郑国际机场T2航站楼超高超大截面独立斜柱施工技术 马学辉,黄挡玉,王亚桥,杜跃锁,徐泽伟 (中建三局集团有限公司工程总承包公司,湖北武汉430070) [摘要]郑州新郑国际机场二期扩建工程T2航站楼沿结构边外围设计124根钢筋混凝土独立斜柱,斜柱截面尺寸 最大1200mm×1600mm、悬挑高度18.2~28.6m 整体向外倾斜6.75°.通过深化设计、受力计算和三维模拟,主 要介绍一种整体自提升式模板加固施工技术,该技术方案形式新颖、定位准确、用材简单,有效保证斜柱倾斜度满 足要求,施工效率提高1.5倍,施工质量优良,效果显著,为超高超大截面独立斜柱施工提供了新思路. [关键词]机场;航站楼;混凝土;独立斜柱;倾斜度;施工技术 [中图分类号]TU745 [文献标识码]A [文章编号]1002-8498(2015)15-0014-03 Construction Technology of Super-high Large-section Independent Oblique Column in Xinzheng International Airport Terminal T2 Ma Xuehui Huang Dangyu Wang Yaqiao Du Yuesuo Xu Zewei General Contraction Company of CCTEB Wuhan Hubei 430070 China) Abstract:Along the out edge of the Xinzheng International Airport terminal T2 124 reinforced concrete independent oblique columns are designed in which the biggest section size is 1 200mm x 1 600mm the cantilevered height is18.2~28.6 m and the wholly outward inclination is6.75°.Through detailed design foree calculating and 3d simulation this paper mainly introduces construction technology of integral self-lifting type template reinforcement.The technical scheme has new form accurate positioning and simple materials.And it even can effectively guarantee the inclination of columns increase the efficiency of the construction as 1.5 times with perfect construction quality.This technical proposal offered a new idea for construction of super-high large-section independent oblique columns. Key words:airp...
施工技术 2015年8月上 6 CONSTRUCTION TECHNOLOGY 第44卷第15期 D0I:10.7672/8js2015150006 新郑国际机场T2航站楼网架提升及下部超长 四叉钢斜撑安装技术 黄挡玉,王亚桥,杜跃锁,徐泽伟,谢亚辉 (中建三局集团有限公司工程总承包公司,湖北武汉430070) [摘要]郑州新郑国际机场T2航站楼工程主楼屋盖网架为正交斜放四角锥网架体系,呈双曲面造型,长319m 宽 263m 最大跨度达90m 面积约7.9万m2 通过8组四叉钢斜撑传力至主体结构型钢混凝土柱上,斜撑锥管截面规 格为(950~1600)mm×42mm 单根最重达50.8t.网架跨度和受力体系形态国内同类建筑较为少见.屋盖网架 采用“分区整体液压提升大悬挑分块吊装”施工技术,四叉钢斜撑采用支架滑移提升安装技术,通过深化设计、方 案优化和施工质量控制,确保主楼网架结构在9d工期内顺利完成,取得较大的经济和社会效益. [关键词]机场:网架;提升;钢斜撑;支撑平台;分级加载 [中图分类号]TU758.11 [文献标识码]A [文章编号]1002-8498(2015)15-0006-05 Construction Technology of Grid Lifting and Installation of Super-long Four-diagonal Steel Supports Below in Xinzheng International Airport Terminal T2 Huang Dangyu Wang Yaqiao Du Yuesuo Xu Zewei Xie Yahui General Contraction Company of CCTEB Wuhan Hubei 430070 China) Abstract:The roof structure of main building area in Xinzheng International Airport terminal T2 is orthogonal diagonal square pyramid grid with a hyperbolic model which is 319 meters at length and 263 meters at wide with the maximum span of 90 meters and area of 79 000 square meters.This grid structure transfers force to the steel reinforced concrete columns of the main structure through 8 groups of four- diagonal steel brace with a maximum weight of 50.8 tons whose sectional specification of cone tube is (950~1 600)mm x42mm.The span of the grid and the force system are relatively rare among domestic similar architectures.This paper adopts a construction technology of partition overall hydraulic lifting and large sus...
[关键词】预应力;机场工程;转换梁;天然地基;水平分层施工;冬期施工 [中图分类号]TU756.42[文献标识码]A[文章编号]1002-8498(2015)09-0045-04 ConstructionTechnologyofLargeSpanPrestressedConversion Beam inXinzhengInternationalAirportTerminal T2 Liu Honglin, Zhou Fenghua, Huang Dangyu (General Contraction Company of CCTEB,Wuhan,Hubei 430070,China) Abstract:The large span prestressed conversion beam in Xinzheng International Airport T2 terminal adopts the natural foundation bearing,horizontal layered construction scheme.The steel bars work adopts a new technology: prefabricated scaffold,firstly finish the main steel bars work and secondly set the stirrups, in the end integrated lay the steel bars synchronously in place by prefabricated hangers.The new technology solves the construction problem made by tight period,heavy load, large rebar diameter, mass concrete and winter construction. The construction efficiency is improved by more than 4 times and the construction quality is excellent, the construction process is safe. Key words:prestressing;airports; transfer beams;natural foundation;horizontal layered construction; winter construction 1工程概况具采用YJM-15型夹片式锚具和挤压锚,转换梁混 郑州新郑国际机场T2航站楼地下2层,地上4凝土强度等级为C40。