2014年5月下 施工技术 第43卷第10期 CONSTRUCTION TECHNOLOGY 127 D0I:10.7672/8gis2014100127 高烈度区黄草坪山岭隧道地震动破坏机理研究 李旭伟,苏天宝 (河南城建学院,河南平顶山467036) [摘要]为了研究高烈度区山岭隧道地震动破坏机理,基于G318黄草坪2上黄草坪隧道,利用离散元分析软件建 立数值分析模型,深人研究了地震波的传播特性及影响隧道地震稳定性的主控因素,具体得出以下结论:①地震波 在洞口处的集中效应、地震波的卓越频带以及隧道纵向围岩的差异性是造成山岭隧道破坏的3个主控因素;②隧 道位移随地震频率的增大而减小,低频地震波导致的隧道位移幅值明显高于高频地震波,因此低频地震波更易造 成隧道结构的破坏;③围岩连接处容易造成衬砌的开裂和剥落,需要进行单独设计和施工. [关键词]隧道工程;地震;破坏分析;研究 [中图分类号]TU475;U451 [文献标识码]A [文章编号]1002-8498(2014)10-0127-04 Research on the Failure Mechanism of Huangcaoping Mountain Tunnel in High Intensity Zone Subjected to Earthquake Li Xuwei Su Tianbao (He'nan University of Urban Construction Pingdingshan He'nan 467036 China) Abstract:In order to research the failure mechanism of mountain tunnel in high intensity zone this paper establishes a numerical model using discrete element software based on the Huangcaoping tunnel at G318.The spreading characterize of seismic wave and the controlling factors which have influences on the seismic stability of mountain tunnel the conclusions are shown as follows:first the effects of hole the predominate frequency of seismic wave and the differences of the surrounding rock are the three factors causing the failures of the mountain tunnel.Second the amplitude of displacements at the top of the surrounding rock increases with the reduction of the frequency of the seismic wave.The displacement at the top of the tunnel triggered by the high frequency band is less than that triggered by low frequency band.Therefore th...
2014年6月上 施工技术 第43卷第11期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5js2014110049 高潮差河段钢箱梁滑移上岸工艺研究 蓝斌1 2 (1.重庆交通大学土木建筑学院,重庆400074;2.中交二航局第二工程有限公司,重庆401121) [摘要]陆域范围钢箱梁安装难度是如何将钢箱梁运送到安装位置,对受到高潮差影响的河段钢箱梁滑移上岸方 案的制订和调整进行了简单阐述,并细化了钢箱梁滑移上岸的具体步骤,同时针对实施过程中存在的不足提出了 相应解决和优化处理措施,最终该项目安全、顺利滑移上岸24钢箱梁,滑移上岸的措施切实可行. [关键词]桥梁工程:斜拉桥;钢箱梁;滑移;施工技术 [中图分类号]U445.4[文献标识码]A [文章编号]1002-8498(2014)11-0049-04 Study on Slip Landing Technology of Steel Box Girder in Different Tidal Range River Lan Bin.2 (1.School of Ciril Engineering Architecture Chongging Jiaotong University Chongging 400074 China; 2.The 2nd Engineering Co.Lid.of CCCC Second Harbour Engineering Co.Lid.Chongging 401121 China) Abstract:The range of steel box girder landing installation difficulty is how box girder is delivered to the installation position the climax of the formulation and adjustment by differential effects of slip landing scheme of steel box girder is described and refinement of the specific steps of steel slip landing and this paper proposes the corresponding solution and optimization measures to solve the problems existing in the implementation process.Finally the slip landing process of 24 steel box girders is safe and smooth. Key words:bridges;cable stayed bridges steel box girders;slip;construction 1工程概况 水期洪峰流量对河床的塑造起重要作用. 如图1所示,某桥为跨径680m双塔双索面钢 闽江口潮型为规则半日潮.桥址处平均高潮 箱梁斜拉桥,主桥全长1280m 位于半径12000m的 位4.836m(罗零高程),平均低潮位0.681m(罗零 竖曲线上,两侧桥面纵坡2.85%,桥面宽28.7m 设 高程),平均潮差4.155m. 2%双向横坡.主桥为7跨连续结构,跨径组成为 2.2气象条件 (60901506801509060)m 边主跨比 工程...
施工技术 2016年12月上 142 CONSTRUCTION TECHNOLOGY 第45卷第23期 D0I:10.7672/sjs2016230142 高温气冷堆抗倾覆锚索施工技术 董林博,刘霖 (中国核电工程有限公司福清核电项目部,福建福清350318) [摘要]错索指的是将拉力传递到稳定的岩层或土体的错固体系.它通常由钢绞线或高强钢丝束(做杆体材料)、 注浆体、锚具、套管和可能使用的连接器组成.根据设计要求,反应堆厂房侧楼底板为抗倾覆锚索施工,对锚索施 工的施工工艺、施工重难点、质量控制进行了详细介绍. [关键词]核电站;高温气冷堆;抗倾覆错索;质量控制;施工技术 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2016)23-0142-05 Construction Technology of Anti-overturning Anchor Cable for High Temperature Gas-cooled Reactor Dong Linbo Liu Lin Fuging Nuclear Pocer Project Department of China Nuclear Power Engineering Co.Lad.Fuging Fujian 350318 China) Abstract:Anchor cable which transfers tension to the stable rock layer or soil is anchorage system.It consists of steel strand or high strength steel wire bundle material)rod body grouting body anchorage casing and the possible use of connectors.According to the design requirements the base plate of the side building of reactor plant is constructed by anchor cable.In this paper the construction technology of anchor cable construction difficulties quality control are introduced in detail. Key words:nuclear power stations;high temperature gas-cooled reactor;anti-overturning anchor cable; quality control;construction 0引言 倾覆锚索静止工作状态总抗力44000kN;每根错索 华能山东石岛湾核电厂高温气冷堆核电站示设计工作状态抗力524kN 最大极限抗力1048kN. 范工程地处山东威海市,高温堆核岛主厂房分为反 抗倾覆错索安全系数设计2.0,锚索防腐等级要求 应堆厂房(包括侧楼)、乏燃料厂房、核辅助厂房以 I级,设计寿命>50年. 及电气厂房.因反应堆厂房与侧楼的基础底标高 常规岛厂房 及主体的结构形式不同,防止侧楼在地震过程中发 1/1-2 1/1-4 1/1-6 /1-7 C/1-10 33800 生倾覆,侧楼基础底板设置了84根抗倾覆错索.本 120012400 400 28002400 190d700540054...
2012年12月上 施工技术 第41卷第378期 CONSTRUCTION TECHNOLOGY 59 高温天气下水泥沥青砂浆的工作性能 调整与灌注技术 刘云鹏,王发洲 (武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070) [摘要]针对高湿天气下水泥沥青砂浆施工经常出现的工作性能损失过快及施工灌注困难等问题,从材料学原理 及施工工艺两方面分析了原因并介绍了相应的解决思路与施工技术,即通过控制水泥的水化速率及提高乳化沥青 的水泥适应性改善砂浆的耐高温性能,通过控制原材料温度及对预湿工艺和灌注节奏进行管控来解决高温下施工 困难的问题,这有效地保证了高温天气复杂工况下水泥沥青砂浆工作性能调整及施工. [关键词]铁路工程;水泥沥青砂浆;灌注;施工技术 [中图分类号]TU578.1;U213.24 [文献标识码]A [文章编号]1002-8498(2012)23-0059-04 Adjustment of Workability and Grouting Technique for CAM Construction Under High Temperature Liu Yunpeng Wang Fazhou State Key Laboratory of Silicate Materials for Architecture Wuhan University of Technology Wuhan Hubei 430070 China) Abstract:The workability of CAM is often greatly influenced by high air temperature and caused difficulty for the grouting process.The reasons were analyzed from the perspectives of both the materials science and construction technique.The solution methods were also proposed including improving the heat resistance of mortar by controlling the cement hydration rate and improving the cement patibility of asphalt emulsion controlling the temperature of raw materials and controlling the pre-wetting and grouting process.These measures successfully ensured the CAM workability adjustment and construction under high temperature. Key words:railway engineering;cement asphalt mortars;pouring;construction 水泥沥青砂浆是应用于高速铁路板式无砟轨问题.因此,《客运专线铁路板式无砟轨道水泥沥 道充填层的一种关键结构材料,其由水泥、乳化沥青砂浆暂行技术规范》中对水泥沥青砂浆的原材料 青、细骨料及各种外加剂组成,主要起弹性减振、调 温度及施工环境温度都有严格的要求(原料储存温 整轨道精度、支撑列车重的作用,对保证轨道平顺 度及施工温度...
[关键词]水工建筑物;水库;高水头压力;渗漏水;封堵;钻孔;灌浆 【中图分类号】TV698.2 [文献标识码】A [文章编号】1002-8498(2015)11-0113-04 VerticalShaftsUnderHighWaterheadPressure Yang Yi (Technology Center of Anhui Shui’an Construction Group Co.,Ltd.,Hefei,Anhui230601,China) AbstractTheresults ofwater sealing construction ina statefree fromwater are paratively better, meanwhile,theeconomic benefitsofwater conservancy and hydro-power projectsin the aspectsofpower generation,irrigation,navigation,cultivation and so on,would be greatly affected.This paper exemplifies the water leakage conditions in the walls ofvertical shafts of the discharge bottom culvert in Mozitan reservoir,focuses on the study on the water sealing technology for the hydraulic structures under high waterhead pressure and figures out the corresponding practicable sealing programs to solve the existing water leakage successfully,in which the difficulties of water sealing under high waterhead pressure are not only solved effectively but alsoremarkable economic and social benefits are produced. Key words:hydraulic structures;reservoirs;high waterhead pressure;water leakage;sealing; drilling;grouting 1工程概况 井高,受现场施工条件和当时施工技术水平制约, 本文以磨子潭水库放水底涵竖井井壁的渗漏 竖井是采取自下而上分成多段浇筑施工的,各段高 水为背景进行研究,采取现场调查、收集历史资料、 度约为10m。
2015年1月上 施工技术 第44卷第1期 CONSTRUCTION TECHNOLOGY 81 D0I:10.7672/sgj82015010081 高水位地基强夯机理及关键施工技术 闫续屏,安明 (山西机械化建设集团公司,山西太原030009) [摘要]利用波动理论解释了高水位地基强夯的加固原理,介绍了高水位地基强夯的关键技术.最后结合工程实 例,介绍了该技术的实际应用,并通过加固效果分析对加固方案进行了调整,取得了良好的效果. [关键词]地基;强;高水位;施工技术 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2015)01-0081-03 Construction Technology and Dynamic Compaction Mechanism of High Water Level Foundation Yan Xuping An Ming Shanxi Mechanisation Construction Group Company Taiyuan Shanxi 030009 China) Abstract:This paper explained the mechanism of dynamic paction in high water level foundation and introduced its key technologies.Based on engineering practice application of the technology was introduced.According to the reinforcement effect the scheme was improved and good effect was obtained. Key words:foundations;dynamic paction;high water level;construction 高水位地基指地下水位不低于地表下4m的地于土体介质,在重锤夯击时,引起土相介质和液相 基,如填海地基、河漫滩地基或者平原、盆地中心及介质的振动频率也不同,所以不同的介质在夯击中 注地、沼泽等高水位区的地基. 引起不同的反应. 高水位地基由于地基土为固相与液相二元结 1.2地基强夯的波动原理 构,故其强夯的加固机理与地下水位以上地基有很 地基是半无限弹性体.强夯处理地基时,由高 大不同,在施工过程中所出现的问题也很复杂. 势能夯锤自由落下,和地基土碰撞产生巨大的冲击 1离水位地基强夯加固机理 波,这部分冲击能,一部分以声波的形式向外传播, 1.1波动理论概述 一部分由夯锤和地基土摩擦而形成热传播,其余大 对连续弹性体而言,质点在连续介质内振动, 部分冲击能以体波的形式由振源点向地基深层及 其振动能可以传递给周围介质,引起周围介质的振 周围传播,能量释放于可加固的地基中,使土体得 动,振动在介质内的传播过程中形成波.波在介质 到不同程度的压密和加固.冲击波对地基产生压 内的传播分为纵波和横波,波的传播形式是纵波还 缩和侧向挤压,产生纵波,纵波的质点振动方向和 是横波由介质所确定:如液体和气体介质除液体表 传播方向相同,所以也称为压缩波(P波),它对地 面可以传播瑞利波外,不能在内部传播横波.液体 基有压密作用.冲击波对地基产生的剪切变形,在 及气体受压缩时,有弹性恢复作用,剪切时无弹性 地基中产生横波,即剪切波(S波),横波的振动方向 恢复作用,所以在液体和气体中只能传播纵波.在 和传播方...
2015年7月下 施工技术 第44卷第14期 CONSTRUCTION TECHNOLOGY 83 D0I:10.7672/8js2015140083 高支模碗扣式满堂支架有限元分析及施工监控 方诗圣,王文洋,顾颖,苑敬舜 (合肥工业大学土木与水利工程学院,安徽合肥230009) [摘要]高支模满堂支架系统在大中跨度现浇连续箱梁施工中普遍使用.为系统分析高支模碗扣式满堂支架应力 与位移变化规律,依托实际工程,通过建立碗扣式满堂支架系统有限元模型,分析结构在各种不利荷载作用下的应 力与位移值,并通过对施工过程中支架应力和位移值的实时监控来验证支架系统的安全稳定性及数值计算的可靠 性.研究表明碗扣支架数值计算与实测最大应力和位移结果大致吻合,且均未超过规范允许值,碗扣支架刚度与 稳定性满足施工要求. [关键词]脚手架;碗扣式支架;应力;位移;监控 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2015)14-0083-05 Finite Element Analysis and Construction Monitoring of High-supported and Cuplock Joint Full Framing Fang Shisheng Wang Wenyang Gu Ying Yuan Jingshun (School of Civil and Hydraulic Engineering Hefei University of Technology Hefei Anhui 230009 China) Abstract:High-supported and cuplock joint full framing system has been widely used in the field of large- middle span continuous casting box-beam bridge construction.In order to make a systematic analysis of the stress and displacement-changing rule in high-supported and cuplock joint full framing this paper makes an analysis of stress and displacement value in structure under various adverse load and verifies the stability and reliability of numerical calculation in framing system by real-time stress and displacement value monitoring during construction.The research shows that the numerical calculation of cuplock joint framing is not only generally in agreement with measured results of the maximum stress and displacement but also both of them are under criterion value and the rigidity and stability of cu...
2010年12月 施工技术 第39卷第12期 CONSTRUCTION TECHNOLOGY 71 高支撑体系抗侧刚度对结构稳定性的影响分析 卫超,孙昌玲 (合肥工业大学土木与水利工程学院,安徽合肥230009) [摘要]高支撑体系主要应用在大跨度、大空间结构中,由于其抗侧刚度不足,易发生整体失稳.为了解决高支撑 体系失稳问题,应用钢结构稳定理论,对其整体稳定进行研究.首先研究高支撑体系抗侧刚度对其稳定性的影响, 其次对不同抗侧刚度的高支撑体系进行有限元分析.结果表明,高支撑体系的抗侧刚度决定其整体稳定性.因此 在工程中设计高支撑体系时,必须根据建筑结构的特点,选择合理的侧向支撑形式,提高其抗侧刚度. [关键词]临界荷载;高支撑体系;整体稳定;抗侧刚度;节点刚度 [中图分类号]TU311;TU731.2 [文献标识码]A [文章编号]1002-8498(2010)12-0071-04 Influence Analysis of Lateral Rigidity on Structural Stability in High Support System Wei Chao Sun Changling School of Civil and Hydraulic Engineering Hefei University of Technology Hefei Anhui 230009 China) Abstract:High support system is mainly used in large-span and large-space structures.Because of their lack of lateral rigidity overall instability can occur easily.In order to solve the instability problem of high support system its overall stability is studied by applying stable theory of steel structures.First the influence of lateral rigidity on stability is researched followed with finite element analysis for the different lateral rigidity of different high support systems.The resuits show that lateral rigidity plays an important role in its overall stability.Therefore in engineering design of high support system the characteristics of building structure must be accorded and reasonable form of lateral support to increase its lateral rigidity should be used. Key words:critical load high support system;overall stability;lateral rigidity joint rigidity 1压杆失稳临界力与抗侧刚度的关系 当抗侧总刚度K.=0时...
[关键词]工程质量;突涌;承压水;超深基坑;止水椎幕 [中图分类号]TU755;TV223[文献标识码】A[文章编号]1002-8498(2012)22-0098-03 Analysis and Treatment to GushingofaSuper-deepFoundation ExcavationinHighPressureWater Area WangBaode,GaoHaiyan,ChenXueguang (China Consruction Eighth Enginering Division Co.,Ltd.Tianjin Branch,Tianjin300452,China) Abstract;Gushing occurred in the elevator well excavation of a super-deep foundation excavation project. Using this as an example, this paper firstly introduced the surrounding environment of the foundation excavation,the hydrogeology conditions,and the relative relation between foundation excavation depth andconfined aquifer.Itisthenintroduced indetail the gushingofconfinedaquiferinelevatorfoundation excavation,pile sidefbored pileandprospecting holes.Atlast,the treatment measuresare summarized and experiences concluded.
1工程概况①,④,6层,静止水位埋深1.5m,该含水层厚约为 1.1基坑周边环境概况15m,其下,③层为相对隔水层,层厚9m。
施工技术 2011年4月上 74 CONSTRUCTION TECHNOLOGY 第40卷第338期 高承压含水层中更换盾尾刷长距离液氮冻结技术 陈成,杨平,张婷,史志铭2 (1.南京林业大学土木工程学院,江苏南京210037;2.中煤五建集团公司上海分公司,上海200135) [摘要]以杭州庆春路过江隧道为例,论述了长距离液氮冻结需要解决的关键技术,介绍了该工程的冻结参数设 计、施工工艺以及测温系统布设与冻土帷幕判断、盾尾刷更换应具备的条件、强制解冻设计及盾构重新推进条件判 断等.结果表明,长距离液氮冻结在封水应用中有着显著成效,与注浆法和盐水冻结法相比技术可靠、安全性好、 节约工期,解决了承压含水层中封水更换盾尾刷的难题. [关键词]盾构;长距离液氮冻结;高承压含水层;冻结参数;冻结帷幕;盾尾刷更换 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2011)07-0074-04 Technology of Long-distance Liquid Nitrogen Freezing in Replacing Shield Tail Brushes in High-confined Aquifer Chen Cheng' Yang Ping' Zhang Ting' Shi Zhiming? (1.School of Cinil Engineering.Nanjing Forestry University.Nanjing Jiangsu 210037 China; 2.Shanghai Branch The Fijfth China Coal Construction Company Shanghai 200135 China) Abstract:Based on Qingchun Road cross-river tunnel of Hangzhou the key technologies of long-distance liquid nitrogen freezing are obtained.The project design construction techniques layout of temperature measurement system thickness of frozen soil determination the qualifications of shield tail brush replacement pulsory thaw design and the condition of shield to re-promote are introduced.The results show that long-distance liquid nitrogen freezing has a significant effect in sealing water.Compared with grouting method and brine freezing the technology is reliable safe and saving time limit.It has resolved the confined aquifer in the shield tail sealing water replacement brush problem. Key words:shield;long-distance liquid nitrogen freezing;hi...
2011年3月下 施工技术 第40卷第337期 CONSTRUCTION TECHNOLOGY 55 高性能水泥复合砂浆钢筋网薄层在 校舍建筑抗震加固中的应用 尚卿1,刘一斌2 (1.湖南大学软件工程学院,湖南长沙410082:2.湖南大学土木工程学院,湖南长沙410082) [摘要]高性能水泥复合砂浆钢筋网薄层(HPFL)窄条带加固技术具有造价低廉、施工简易、工作可靠等诸多优点. 介绍了HPFL窄条带挑震加固砌体结构的研究成果:HPFL窄条带能显著提高墙体的抗震抗剪承载力、抗侧刚度、 耗能能力和延性,并减缓墙体削度退化的速度.结合工程实例,给出了具体设计和施工方法.经计算,加固前部分 墙肢抗展承载力不满足要求,加固后各楼层墙肢均满足抗展承载力要求. [关键词]高性能复合砂浆钢筋网;校舍建筑:抗加固;抗剪承载力;抗侧刚度;延性 [中图分类号]TU352.1 [文献标识码]A [文章编号]1002-8498(2011)06-0055-03 Application of High Performance Ferrocement Laminate in Seismic Strengthening Design of School Buildings Shang Qing' Liu Yibin2 (1.College of Software Engineering Hu'nan Unicersity Changsha Hu'nan 410082 China; 2.College of Cicil Engineering Hu'nan University Changsha Hu'nan 410082 China) Abstract:High performance ferrocement laminate(HPFL)banding strengthening technique has many advantages such as low cost simple construction and reliable operation.The authors introduce some masonry seismic strengthening research achievements using HPFL banding such as it can improve the seismic shear strength lateral stiffness energy dissipation capacity and ductility of the wall it also can slow down the speed of the stiffness degeneration.Combining with a project example the specific design and construction method are given out.It is testified by calculating that partial walls did not meet the seismic capacity requirements before strengthening however all the walls match the standards after strengthening. Key words:high performance ferrocement laminate;school buildings;se...
施工技术 2015年8月下 60 CONSTRUCTION TECHNOLOGY 第44卷第16期 D0I:10.7672/sgis2015160060 高性能新型纤维增强气凝胶板外保温构造措施研究* 张季超,张婷婷,吴会军 (广州大学土木工程学院,广东广州510006) [摘要]将EPS聚苯板和岩棉板这两种常用保温隔热材料与新型纤维增强气凝胶材料进行对比,对纤维增强气凝 胶板外墙保温系统构造进行研究,提出了错固纤维增强气凝胶板和现浇纤维增强气凝胶板的外墙外保温系统两种 构造措施,并研究了其热工性能,研究结果表明两种做法均能满足规范对建筑保温外墙热工性能的要求,且保温隔 热性能优于其他外保温系统. [关键词]预制装配式;纤维增强气凝胶板;外保温;构造;热工性能 [中图分类号]TU111.4 [文献标识码]A [文章编号]1002-8498(2015)16-0060-04 Study on Fiber-reinforced Aerogel Board External Thermal Insulation System Structure Zhang Jichao Zhang Tingting Wu Huijun College of Civil Engineering Guangzhou University Guangzhou Guangdong 510006 China) Abstract:Compared several mon thermal insulation materials with fiber-reinforced aerogel.Study on fiber-reinforced aerogel board external thermal insulation system two kind of insulation structures are put forward one anchored fiber-reinforced aerogel board on existing wall another poured concrete wall with fiber-reinforced aerogel board in place.Then thermal parameter to evaluate thermal performance is calculated results showed thermal parameters of two kind of aerogel board external thermal insulation systems could meet the specification and fiber-reinforced aerogel was superior to other thermal insulation materials. Key words:precast;fiber-reinforced aerogel board;external thermal insulation system;structure; thermal performance 建筑外墙是建筑围护结构中最主要的热量损料在围护结构中使用部位的不同,可分为内、外保 耗部位,随着我国建筑节能设计向节能65%的标准 温隔热材料2.目前,EPS聚苯板、岩棉板等是市面 推进,加快新型外墙保温隔热材料研究的步伐不但 上主要的外墙保温隔热材料,本文研究的是一种高 可以大大改善建筑物室内热环境,而且还能够...
[关键词]钢筋工程;连续复合螺旋箍;施工技术;应用 [中图分类号】TU392.2[文献标识码]A[文章编号]1002-8498(2014)03-0023-04 Manufacturing Technology and Engineering Application of High-strength Continuous Compound Spiral Hoop Zhang Qian',Jiang Weishan²,Yu Qingrong”,Guan Junfeng (1.State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China; 2.College of Civil Engineering,Xi'an Uniwersity ofArchitecture &Technology,Xi'an,Shaanxi710055,China; 3.Schol of Civil Engineering,Tianjin University,Tianjin 300072,China; 4.North China Instiute of Water Conservancy and Hydroelectric Power,Zhengzhou,He'nan 450011,China) Abstract:This paper proposes the use.of high-strength continuous pound spiral hoop in addressing various weaknesses, such as steel wastes from conventional hoop reinforcement, overcrowding of hoop at reinforcement areas,and difficulties in concrete vibration and construction. This paper also analyzes the advantages of high-strength continuous pound spiral hoop, construction processes,operational key points and quality control. It shows that the high-strength continuous pound spiral hoop can prevent various weaknesses in conventional hoop reinforcement,minimize the consumption of steel,and improve work efficiency. Key words;reinforcement; continuous pound spiral hoop; construction; application 0引言螺旋槽3种。
施工技术 2014年1月上 26 CONSTRUCTION TECHNOLOGY 第43卷第1期 D0I:10.7672/sgj82014010026 高强度花岗岩中大直径钻孔灌注桩施工技术* 陈飞 (江西理工大学资源与环境工程学院,江西州341000) [摘要]宁德吉屿大桥钻孔灌注桩桩径2.2m、桩深86m 桩端持力层进人强度高达138MPa的弱风化花岗岩3m 经 过多种施工方案的分析比较,采用回转与冲击组合钻进工艺,满足了工程质量和进度要求,节省造价12万元,缩 短了工期.详细介绍了回转、冲击钻进施工工艺和技术措施,对施工中存在的问题及处理措施进行了总结. [关键词]桥梁工程;桩基础;花岗岩;钻孔灌注桩;施工技术 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2014)01-0026-03 Construction Technology of Large-diameter Bored Piles in High Strength Granite Chen Fei (Faculty of Resource and Environmental Engineering Jiangxi University of Science and Technology Ganzhou Jiangxi 341000 China) Abstract:The bored pile diameter of Ningde Jiyu bridge is 2.2m and the depth of pile is 86m.The bearing layer of pile end drilled in slightly weathered zone granite with 138 MPa strength and 3m depth. According to the analysis and parison of different construction schemes rotary drilling and percussion drilling were adopted which can meet the requirement of construction quality and progress.This paper introduced construction and technical measures of rotary drilling and percussion drilling in detail and summarized the problems in construction and its treatment measures. Key words:bridges;piles;granite;bored piles;construction 1工程概况 630kPa;⑥强风化花岗岩厚16.1~20.3m 9= 福建宁德吉屿大桥全长2162m 设计为双向645kPa 9.=720kPa;⑦弱风化花岗岩厚26m 主要 车道,桥墩采用柱式墩,桩基采用灌注桩基础,其中矿物为白云母、黑云母、钾长石等,节理裂隙不发 2 3号主墩基础共有2.2m钻孔灌注柱40根,桩长 育,岩心坚硬、致密,基岩强度很高,其最低强度 86m 设计承载力极限值为28000kN 桩基持力层进 Rm=65MPa 最高强度R=138MPa 桩尖进入弱 入弱风化花岗岩3m. 风化花岗岩3m. 2工程地质条件 3施工难点及成孔工艺优化选...
2014年1月上 施工技术 第43卷第1期 CONSTRUCTION TECHNOLOGY 109 D0I:10.7672/sgj82014010109 高应力矿山锚网支护巷道围岩变形监测与分析* 卢洋龙,刘佳朋2,马丁 (1.西南科技大学环境与资源学院,四川绵阳621010; 2.葛洲坝易普力股份有限公司西昌分公司,四川西昌615000) [摘要]针对大顶山矿区巷道水平应力较大以及错喷支护难以满足生产及安全要求等问题,采用无喷混凝土铺 杆TECCO网支护方法取代原锚喷支护,在解决支护难题的同时,也节约了成本.为了验证铺网支护效果,对铺网 支护巷道围岩的表面位移进行监测,并通过对监测所搜集到的数据进行拟合分析,及时掌握围岩变形变化动态,以 便更好地对围岩稳定性作出预测和评价,确保巷道安全可靠,指导矿山安全生产. [关键词]矿山;高应力;支护;围岩;变形;监测 [中图分类号]TU454 [文献标识码]A [文章编号]1002-8498(2014)01-0109-05 Monitoring Analysis on the Deformation of Surrounding Rock of High Stress Tunnel Supported by Bolts and Nets Lu Yanglong' Liu Jiapeng Ma Ding' (1.School of Environment and Resource Southwest University of Science and Technology Mianyang Sichuan 621010 China; 2.Xichang Branch Explosive Gezhouba Co.Ltd.Xichang Sichuan 615000 China) Abstract:According to the questions in the Dadingshan mine that horizontal stress in tunnel is large and the method of bolt and spray concrete supporting can't meet the requirement of production and safety. The authors used supporting method without spraying concrete instead of former one to solve the problems and reduce the cost.In order to verify the functions of supporting it's necessary to monitor the surface displacement of surrounding rock in tunnel supports.Authors analyze the data to know the dynamic deformation of surrounding rock in time in order to make a better prediction and evaluation of surrounding rock stability to ensure tunnel safe and reliable and guide a safe production. Key words:mines;high stress;...
2012年1月上 施工技术 第41卷第356期 CONSTRUCTION TECHNOLOGY 59 高寒季节性冻土地区地基处理冬季施工技术 闫续屏 (山西省机械施工公司,山西太原030009) [摘要]以大唐阜新煤制天然气工程的冬季施工实例,介绍了高寒季节性冻土地区在大规模场平和高填方强夯地 基冬季施工中采取的施工措施.采取了地温测量、强夯试打、探槽观测3项观测探查措施确定场地冻夹层消融的 时间.工程检测结果表明,地基处理全部满足设计要求. [关键词]地基处理;冻土;强夯;冬季施工;测量;探槽 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2012)01-0059-02 Winter Construction Technology of Field-leveling and High Fill Foundation Dynamic Compaction in Alpine Seasonal Frozen Soil Area Yan Xuping (Shanxi Machinery Construction Company Taiyuan Shanxi 030009 China) Abstract:Based on engineering practice of some gas engineering in Fuxin the author introduces construction measures of field-leveling and high fill foundation dynamic paction in alpine seasonal frozen soil area.Three observation measures such as earth temperature measuring dynamic paction test and trench observation are adopted to determine the ablation time of frozen dissection.Engineering detection results show that the treatment can meet the requirements of design. Key words:foundation treatment;frozen soil;dynamic paction;winter construction; measurement;trench 1工程概况 1417478m3 总填方量1304196m3.最大填方高 辽宁大唐阜新煤制气有限公司日产1200万m3度18.05m.场地整平后分为11个台阶,各个台阶 煤制天然气项目,位于阜新市新邱区长营子镇.处设计标高分别为绝对高程196 200 202.5 203.5, 于阜新盆地中部,地势西南高,东北低,海拔标高在205 207.5 212.5 217.5 218 220 221.5m. 181.5~243m. 3)填土成分复杂,本场地的填方材料为挖方区 阜新市属北温带大陆性季风气候,四季分明.出土,主要成分为砾砂、残积土、碎石土、强风化粗 其主要特点是春季干早多风,夏季干燥,雨涝集中, 砂岩,中风化粗砂岩等多种成分,且均为易风化材 秋季降温较快,冬季严寒少雪.全年无霜期150d左 料.在地表水、地下水的渗透下易产生风化、渗透 右,初霜最早在9月下旬,终霜最晚在5月中旬,平 变形和地层塌陷等不良...
【关键词]脚手架;满堂脚手架;外倾斜柱;模板;有限元分析 [中图分类号]TU731.2【文献标识码」A[文章编号]1002-8498(2013)11-0020-04
for Outward TiltingHigh Columns Li Xuejin', Tong Huawei', Huang Heng² (1.Academyof CivilEngineering,Guangzhou Unitersity,Guangzhou,Guangdong 510006,China; 2.China Overseas (Shenzhen) Construction Co.,Lad.,Shenzhen, Guangdong 518057,China) Abstract;Taking the Guangzhou PZB1401 project as an example, this paper elaborates the design and application of utilizing fastener full scaffold as the supporting system for the formwork of tall and outward tilting columns. A three-dimensional calculation model was established using the finite element software Midas Gen where the orthogonal fasteners were simulated as semi-rigid connections. The scaffold was model, the effect of scaffold detailing to horizontal load resistance of the full scaffold was quantitatively analyzed and optimized support system design scheme was proposed. Key words;scaffolds; full scaffolds; outer inclined columns;formwork; finite element analysis 高大外倾斜柱由于空间定位要求高、施工荷载别大,楼面结构和斜柱上的装饰结构往往还需和斜 大且集中,所以在测控、钢筋绑扎、模板支设及混凝柱一同施工,所以采用上述方法均存在一定困难。
2013年1月下 施工技术 第42卷第2期 CONSTRUCTION TECHNOLOGY 83 高墩连续梁0号块悬挑结构支撑架设计及施工 吴俊 (中铁一局集团第二工程有限公司,河北唐山063004) [摘要]结合新建合福铁路客专闽赣段芹口特大桥(406440)m连续梁0号块悬挑结构支撑架设计及施工,介 绍了高墩连续梁号块支撑架施工的一种新思维,即采用悬挑结构作为支撑体系,结合反支点预压法压载进行验 证的施工技术.实践证明,该方法安全高效,既可以满足施工需要,又能保证施工质量.设计过程中,对悬挑结构 横向分配梁、悬挑纵梁、预压钢绞线布置、分配梁端头错固承载能力等进行验算,均能满足设计要求. [关键词]桥梁工程;连续梁;0号块;悬挑结构;支撑架;设计;施工 [中图分类号]TU731.2 [文献标识码]A[文章编号]1002-8498(2013)02-0083-03 Design and Construction of No.0 Block Cantilever Supports of High Pier Continuous Girders Wu Jun Second Engineering Company Lid.of China Railway First Group Tangshan Hebei 063004 China) Abstract:With respect to the design and construction of the No.0 block cantilever support of the continuous girder of Qinkou Bridge (40 64 40)m in Hefu Railway this paper introduces a new idea of constructing the No.0 block supports of high pier continuous girders that is to use the cantilever structure as the support system and use reverse pivot preloading method for ballast verification.The practice showed that the method was safe and efficient.It could satisfy the construction requirement and ensure the construction quality.The transverse division girder cantilever longitudinal girder distribution of preloading steel strand anchor at the end of the division girder were checked for their resistances and all of them were found to meet the design requirements. Key words:bridges;continuous girder;No.0 block;cantilever structure;supports;design;construction 1工程概况 法适用于低矮墩柱0号块施工,施工周期长,投入成 新建合福铁路客专闽赣段芹口特大桥(4064本大;...