【关键词】钢结构;屋面;有限元分析;局部高温;力学性能 [中图分类号】TU758.11[文献标识码】A[文章编号】1002-8498(2013)21-0100-03 TheMechanicalPropertiesofSwimmingandDivingHall of QingdaoSports CenterUnder TemperatureRising Zhang Jigang’,Tao Guansi²,Ning Wei,Rong Qintao',Liu Bin (1.School ofCivil Engineering,QingdaTechnologicalUniversity,Qingdao,Shandong266033,China; 2.Qingdao Bohai Construction Group Co.,Lid.,Qingdao,Shandong 266001,China) Abstract:The roof of Swimming and Diving Hall of Qingdao Sports Center is a steel roof with plex structure,large span,multiple-shaped curved surface. The finite element software ANSYS was used to analyze the mechanical behaviour of the roof structure under local temperature rising.The results show that high temperature results in the yielding of structural ponents and the development of plastic deformation.After the middle area warms up, the vertical displacement efect of network is the largest. Above average area and upper left area are adverse areas in the process of temperature rising. Key words; steel structures; roofs; finite element analysis; local temperature rising; mechanical behaviour 青岛市体育中心游泳跳水馆坐落于美丽的青 岛市东部浮山新区,该体育馆的屋盖形式为复杂的 多曲面异形钢屋盖,屋盖的跨度:南北向为101.2m, 东西向为130m。
该建筑的最低处标高为 -10.800m,最高处标高为30.700m。
网架的结构 形式为焊接空心球节点四角锥网架。
该网架共设有46个支座,其中室内有42个周图1青岛体育中心游泳跳水馆建筑效果 边支撑柱,支撑形式为弹性支座,室外有4个落地支Fig. 1Architectural effect of Swimming and Diving 撑点,支撑形式为刚性支座。
网架结构新颖,外观Hall of Qingdao Sports Center 非常形象美丽,看起来像海中的大贝壳。
[关键词】钢结构;管桁架;网壳;胎架;拼装;焊接 [中图分类号]TU758.1[文献标识码]A[文章编号]1002-8498(2014)02-0024-04 Construction oftheSteelStructuresofPlantMuseumin WorldGardeningExhibitionQingdao
(1.Qingdao Building Engineering Quality Supervision Station,Qingdao,Shandong 266071,China; 2.Qingdao Engineering Construction Supervision Co.,Lad.,Qingdao,Shandong 266071,China; 3.Qingdao Jian'an Construction Group Co.,Lad.,Qingdao,Shandong 266071,China; 4.Qingdao Century Square Investment Co.,Lad.,Qingdao,Shandong 266071,China) Abstract:Combined with the steel structure features of plant museum of the World Gardening Exhibition Qingdao, such as the truss and shells have large span and areas, it is easy to deform for integral transportation,the construction techniques of ponents processing in factory,assembly on site,and segmental hoisting and assembly are applied. The construction of the steel structures processing, assembling,welding and segmentalhoisting of tube truss and single-layer shell are introduced in detail. it ispointed out that after welding of the steel structures,each unit uses cycle proportional unloading. Key words:steel structures; tube truss; shells;jig;assembly;welding
1工程概况单体B单体D 2014年青岛世界园艺博览会场区位于青岛市 百果山森林公园,由植物馆、主题馆、梦幻科技馆等 10余个场馆组成。
[关键词】高层建筑;地震;剪力;门式拉索桁架;钢板梁;屈曲分析 [中图分类号】TU318.8[文献标识码]A[文章编号]1002-8498(2015)10-0009-04 StructuralScheme Optimization andDesignDifficultiesAnalysisof ShaanxiYanchangPetroleumHeadquartersTower ZhaoHong'an,Wang Min,XinLi,Wang Xinhua (China Northwest Architecture Design and Research Institute Co.,Lid.,Xi'an,Shaanxi 710018,China) Abstract:The Shaanxi Yanchang Petroleum Headquarters Tower is 195.45min height,and the structural form of the building is concrete filled steel tubular column and H-section steel beams bining reinforced concrete core tube.Anoutriggersystemhasbeen setled inalayerof thebuilding.Inorderto meet the requirement of the outsideframe to bear the seismic shear force,the structural schemehas been modified,and the concrete tubein the staircase has been replaced by the steel column with concentrically steel frames.The result of the calculation shows that the effect of this structure modification is significant. Furtheore,thediffcult pointanditssolutionf thestructuraldesignsuchasthestructureof thecurtain wall of the mid hall and the awning of the entrance is showed. Key words:tall buildings; seismic; shear force;gate cable truss; steel plate beam;buckling analysis 1工程概况 陕西延长石油科研中心位于西安市高新区,总 建筑面积21.8万m²,其中地上15.2万m,地下 6.6万m²。
[关键词】降雨强度;边坡稳定性;安全系数;降雨持时;数值模拟 [中图分类号]TU432;U416.14 [文献标识码]A [文章编号]1002-8498(2013)05-0078-04 NumericalSimulationStudy onSlopeStabilityDuringRainfall Intensity Sun Yongshuai', Jia Cangqin²,Wang Guihe²,Hu Ruilin',Zhou Wuping² (1.KeyLaboratryfEngineringGemechanicsIstituefGeolgyandGeophysis, Chinese Academy of Science,Beijing 100029,China; 2.School of Engineering and Technology,China University of Geosciences(Bejing),Beijing 100083,China) AbstractInthispaper,therearewfactorsintensityfrainfalland durationfrainfallwhichaft the stability of slope were studied based on numerical simulation. The results show that under the same slope of the thickness, the same rainfall time, the greater rainfall intensity, the faster the safety factor decline, the greater change in soil pore water presure, the greater change of displacement of soil. Finally,the displacementofsoilwillnhance,the stabilityof slopewill decrease;The slopeofbigrainfall intensitylidesbefore the slopefmallainfallintensity,hegreater theranfallntensityis,thefaster h stable state of the slope gets.The infiltration depth of the slope of big rainfall intensity is always greater than the infiltration depthof the slope of small rainfall intensity,the safetyfactor of the slopeofbig rainfall intensity is always lower than the safety factor of the slope of small rainfall intensity. Key wordsrainfall intensity;slope stability;safety factor;rainfall duration;numerical simulation 本文以人工从现场工地取土所制作边坡为研 边坡土体内部的渗流变化情况。
2012年9月上 施工技术 第41卷第372期 CONSTRUCTION TECHNOLOGY 63 降雨对边坡稳定性影响研究综述 孙永帅,贾苍琴,王贵和 (中国地质大学工程技术学院,北京100083) [摘要]提出降雨对边坡稳定性影响研究的意义,指出降雨人渗是导致边坡失稳的主要诱发因素,从理论研究现 场试验和室内试验3方面综述了降雨入渗对边坡稳定性影响的研究现状.归纳和总结了饱和-非饱和理论和边 坡稳定性分析方法、边坡稳定性变化规律及影响因素.其中,重点介绍了极限平衡法、极限分析法、有限元法等 相关方法,并且指出了它们的优点和存在的相关问题,在此基础上综述了相关试验研究现状,并指出其中的不足. 最后针对目前研究中所存在的问题就今后的发展方向提出了自己的看法. [关键词]边坡稳定性;降雨;非饱和土;渗流;试验 [中图分类号]TU43 [文献标识码]A [文章编号]1002-8498(2012)17-0063-04 Overview of Research on Stability of Slope During Rainfall Sun Yongshuai Jia Cangqin Wang Guihe School of Engineering and Technology China University of Geosciences Beijing 100083 China) Abstract:The significance of studying the stability of slope during rainfall is highlighted in this paper. Rainfall infiltration is the main factor that causes slope instability.This paper summarizes current research on slope stability during rainfall from three aspects of theoretical research field test and laboratory test.Saturated-unsaturated theory and slope stability analysis method are summarized as well as principles governing the change of slope stability and influence factors.Among them limit equilibrium method limit analysis method and finite element method are introduced in detail with their advantages and disadvantages highlighted.After that this paper summarizes the current situation of model tests and pointed out their shortings.At last the authors presented their own ideas on further development with respect to the problems existing. Key words:slope stability;rain;unsat...
施工技术 2015年7月上 64 CONSTRUCTION TECHNOLOGY 第44卷第13期 D0I:10.7672/sgjs2015130064 降雨与地震共同作用下碎石土边坡的稳定性分析* 李晓莲,余云燕2,陈志敏2 (1.天水师范学院,甘肃天水741001;2.兰州交通大学土木工程学院,甘肃兰州730070) [摘要]为研究降雨与地震共同作用条件下碎石土边坡稳定性的影响机制,通过建立楼房山隧道罐子沟端滑坡防 治工程数值计算模型,分别计算并分析了降雨单独作用、地震单独作用及降雨与地震共同作用条件下边坡应力场、 位移场、塑性区及剪应变增量的变化规律,从而得出3种情况下边坡稳定性的破坏机理.研究结果表明,降雨与地 震共同作用下碎石土边坡的稳定性比降雨单独作用或地震单独作用时的稳定性差,更容易发生滑坡、泥石流等地 质灾害. [关键词]边坡;降雨;地震;稳定性;有限元分析 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2015)13-0064-08 Analysis on Gravel Slope Stability During Rainfall and Earthquake Li Xiaolian' Yu Yunyan2.Chen Zhimin2 (1.Tianshui Normal University Tianshui Gansu 741001 China; 2.School of Civil Engineering Lanzhou Jiaotong University Lanhou Gansu 730070 China) Abstract:In order to research the affecting mechanism of gravel soil slope stability under the condition of rainfall alone earthquake alone both rainfall and earthquake this paper established the three- dimensional numerical model of Loufangshan gravel landslide and analyzed the change rule of the stress field displacement field plasticity zone and shear strain increment of slope under the condition of both rainfall and earthquake.The research result shows that the stability of gravel soil slope is decreased greatly under the condition of both rainfall and earthquake and more prone to landslides or debris flow. Key words:slope;rainfall;earthquake;stability;finite element analysis 0引言 主要机理和一般的力学机理.文献[3]通过大型模 在岩土工程领域,大量学者致力于研究降雨或 型试验研究降雨诱发三峡库区碎石土滑坡变形破 地震单一因素对边坡稳定性的影响,如文献[1]通 坏的机理,分析了不同降雨强度、降雨历时及坡度...
施工技术 2017年6月下 16 CONSTRUCTION TECHNOLOGY 第46卷第12期 D0I:10.7672/8js2017120016 降低屋面工程渗漏率的几点思考 霍瑞琴 (山西建筑工程(集团)总公司,山西太原030002) [摘要]为降低屋面工程渗漏率,从制定标准规范入手,提出树立“以排为主”的思想.采用结构找坡、加大屋面坡 度、对种植屋面的结构层采用防水混凝土,当屋面结构不能采用结构找坡时,应在屋面上增设坡屋顶的做法,才是 大幅度改善屋面防水功能的正确选择. [关键词]屋面工程;渗漏;结构找坡;防水混凝土 [中图分类号]TU761.11 [文献标识码]A [文章编号]1002-8498(2017)12-0016-02 Reflections on Reducing Leakage Rate of Roof Engineering HUO Ruiqin Shanxi Construction Engineering Group Co.Taiyuan Shanxi 030002 China) Abstract:In order to reduce the leakage rate of roof engineering this paper puts forward the idea of 'taking the platoon as the main factor'from the development of the standard.Some methods are put forward which are the right choice to greatly improve the roof waterproof function including applying structural slope increasing roof slope applying waterproof concrete for planting roof structure layer and when the roof structure can not adopt the structural slope the slope roof should be added on the roof. Key words:roofs;leakage;structural slope;waterproof concrete 为贯彻落实2016年12月26日全国住房城乡施》中对桂林市的屋面进行了调查,调查结果显示: 建设工作会议关于“加快工程建设改革步伐,切实 有39%的房屋发生渗漏,在所渗漏的房屋中平屋面 树立标准权威”的要求,住房和城乡建设部以创新、 占86%,平坡结合屋面占11%,种植屋面占3%. 协调、绿色、开放、共享的发展理念,将重点在装配 被访建筑中平屋面和种植屋面都有渗漏情况发生, 式建筑、门窗、防水、装饰装修和可再生能源等领域 坡屋面没有渗漏情况.综合对比分析:种植屋面渗 推进住房标准化水平,通过完善我国的标准体系, 漏情况较多、平屋面次之,而坡屋面防渗漏的效果 实现与国际先进标准技术指标的全面对接,从而提 最好.这个结果和从业内专家了解掌握到的情况 升住房的居住品质. 基本一致. 屋面防水是建筑防水工程的重要部分,其渗漏 从目前走访调查的情况看,种植屋面与种植顶 问题是建筑工程中多年来一直未能很好解决的质 板的渗漏率也是不同的,种植屋面的渗漏率要远远 量通病.根据住房和城乡建设部“关于提高建筑标 大于地下种植顶板.究其原因主要...
[关键词]公路工程;隧道;防水;施工技术 [中图分类号]U455 [文献标识码]A [文章编号〕1002-8498(2016)24-0094-03 ConstructionofNaozhiExtra-longTunnel Wang Xinchuan,Lei Yangchuan,Cui Huafeng,Lei Fan (China Constructin Sixth Engineering Division Bridge Co.,Lid.,Chongqing 402260,China) Abstract:In order to solve the safety problems during the construction of shallow buried segment at the entrance of Naozhi extra-long tunnel,such as the difficulties of long distance power and pressed air supply,the bination of natural landscape and construction at the entrance and the waterproof and drainage in the tunnel,considering the characteristics of the extra-long tunnel itself,a series of construction measures are put forward,such as the bination of the landscape and the greening at the entrance,excavation methods for different surrounding rock,the waterproof and drainage and the power supply,the usage of air bag in pressed air supply.Different solutions for different problems ensured the pletion and acceptance of the tunnel. Key words;road construction; tunnels;waterproofing; construction 0引言 共性的施工难度,也有着每个隧道特有的难点,但 公元前2180~前2160年,在幼发拉底河下修 特长隧道的施工一直是各类隧道施工中难度最大 建的一条约900m长的砖衬砌人行通道,是迄今已 的类型之一。
施工技术 2013年11月上 70 CONSTRUCTION TECHNOLOGY 第42卷第21期 D01:10.7672/sgjs2013210070 门形抗滑桩结合高压旋喷止水帷幕支护 在临江深基坑中的应用* 袁尚锋,吴曙光2,詹重伟,郭福元,邱伟 (1.中建三局第一建设工程有限责任公司,重庆400010; 2.重庆大学土木工程学院,重庆400045) [摘要]结合重庆力帆中心临江深基坑工程,介绍了门形抗滑桩结合高压旋喷止水帷幕支护技术的应用.利用有 限元分析及结合现场实际监测,得出了门形抗滑桩支护在临江软土基坑中可以较好控制基坑侧向变形,门形抗滑 桩结合高压旋喷止水帷幕能很好屏蔽江水的渗透,确保了周边构筑物的安全及基坑内施工的安全.严格控制关键 工序,对确保施工质量至关重要. [关键词]基坑;支护;门形抗滑桩;止水帷幕;监测 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2013)21-0070-03 Application of Portal Structure Anti-slide Pile Combined with High-pressure Jet Grouting Waterproof Curtain Supports of in River-side Deep Foundation Excavation Yuan Shangfeng' Wu Shuguang? Zhan Chongwei' Guo Fuyuan' Qiu Wei' (1.The First Construction Engineering Limited of China Construction Third Engineering Bureau Chongging 400010 China; 2.The College of Civil Engineering of Chongging University Chongging 400045 China) Abstract:Based on the river-side deep foundation excavation of Chongqing Lifan Center this paper introduces the application of portal structure anti-slide pile bined with high-pressure jet grouting waterproof curtain supports.Using finite element analysis and field monitoring it is concluded that the portal structure anti-slide pile can control the lateral deformation of soft foundation excavation effectively and the portal structure anti-slide pile bined with high-pressure jet grouting waterproof curtain supports can stop the penetration of river water well and ensure the safety of the surrounding structures and the safety of cons...
[关键词】钢结构;门式网架;无支架施工;施工技术 [中图分类号]TU765 [文献标识码]A [文章编号〕1002-8498(2016)17-0134-03 ConstructionTechnologyWithout Supports for Gantry Grid Xu Guoyin,Liu Yinsheng,Yong Xin,Liang Yi (Zhejang Guosheng Steel Structure Co.,Lid.,Hangzhou,Zhejiang 311243,China) Abstract:Based on dry coal shed grid engineering of Ulan Bator Amugulang Heating Station project in Mongoliaaccordingto the characteristicsand difficultiesof the drycoal shedgrid engineering,this paper introduces construction technology without supports for gantry grid,taking appropriate measures.The application of the technology not only bring about certain economic benefits, but also makes new breakthrough of the technical innovation of installation for the dry coal shed grid. Key words;steel structures;gantry grid;construction without supports;construction 1工程概况 蒙古国乌兰巴托阿木古郎供热站项目干煤棚网 架工程采用门式全平板网架结构,螺栓球节点形式, 正放四角锥体系。
[关键词]加固;古建筑;移位;托换;顶升 [中图分类号】TU746.4[文献标识码】A [文章编号]1002-8498(2012)21-0085-05 Design and Construction of Integral Combinational Shift of Jinlun Hall Li Guoxiong (Guangzhou Luban Construction Group,Guangzhou, Guangdong 501665,China) Abstract;Because of city building needs, the Jinlun Hall must be integrally shifted. The integral shift scheme of translation bining with lifting is adopted by scheme selection. Combined with engineering practice,the author introduces the shift principle,key technologies, strengthening measurements,design and construction technology. Afer shifting, the corrective and connection measures are proposed by monitoring, the quality and safety of project are ensured, and the Key words: strengthening; ancient buildings; shift; underpinning; lifting 1工程概况 会馆平移前先施工托换结构及轨道结构体系, 锦纶会馆建于清雍正元年(1723年),占地面积托换结构体系作为建筑物的底盘,托换梁及轨道梁 668m²,单层青砖空斗墙砖木结构,青砖墙下叠放.之间设置滚轴。
[关键词]地基;软土;机场;强夯;冲击碾压;密实度 [中图分类号]TU753[文献标识码]A[文章编号〕1002-8498(2013)19-0088-04 TestStudyonSoftSoilFoundationImprovementof JinzhouAirportFlightArea Liu Tianfu (Liaoning Branch of China National Geological Exploration Center of Building Material Industry,Shenyang,Liaoning 110004,China) Abstract: The ground improvement engineering of Jinzhou Airport flight area has high demand about foundation bearing capacity and settlement.According to the prevalence of soft soil layer in the field, the dynamic paction and impact rolling test were taken.The testing results show that the two kinds of foundation treatment methods can effectively'improve the soft foundation intensity and control the uneven settlement of foundation, and provide technical parameters and the scientific basis for a wide range of foundation treatment. Key words;foundations; soft soil; airports; dynamic paction; impact rolling; pactness
1工程概况表1各土层物理力学指标 新建锦州机场拟建场址位于锦州市凌海建业Table 1 Physical and mechanical parameters of soils 乡何屯村南侧、小凌河东岸,拟建场区原为锦州市土层密度/天然天然内摩黏聚力压缩模量 何屯盐场所在地,地貌单元属滨海平原,地形平坦,名称(gcm)含水量孔醇擦角c/kPa Ea.1-0.2/ 地基处理前孔口高程1.670~1.910m,高差0.24m。
施工技术 2013年3月上 44 CONSTRUCTION TECHNOLOGY 第42卷第5期 D0I:10.7672/8gs2013050044 锦屏高陡边坡脚手架安全管理控制技术 曾思凯,王勇,陈鹏飞 (中国永利水电第七工程局成都水电建设工程有限公司,四川成都611130) [摘要]高陡边坡、高危危岩体处理支护工程中脚手架是边坡支护施工的重要环节,脚手架搭设质量及施工安全管 理直接影响脚手架的安全运行,进而影响工程施工的安全、进度和成本.锦屏一级水电站高陡边坡脚手架在搭设 施工中的安全管理控制程序及专利加固技术的应用,为脚手架搭设及施工安全管理控制提供了有效手段,保证了 脚手架搭设施工过程的安全受控. [关键调]脚手架;水电站;高陡边坡;安全管理 [中图分类号]TU714 [文献标识码]A [文章编号]1002-8498(2013)05-0044-04 Safety Management and Control for Scaffolds on High and Steep Slopes in Jinping Zeng Sikai Wang Yong Chen Pengfei Chengdu Sinohydro Construction Engineering Co.Led.Sinohydro Bureau 7 Co.Lad.Chengdu Sichuan 611130 China) Abstract:Scaffolds are very important in support construction for high and steep slopes and dangerous rock bodies.The installation quality and construction safety management have direct influences on the safe operation and as a result influence the construction safety construction progress and cost. Application of construction safety management control procedure and patented strengthening technology in the scaffold installation for the high and steep slopes of Jinping first stage hydropower station provided effective measures for the safe construction and safety management of scaffolds and ensured the construction safety during scaffold installation. Key words:scaffolds;hydropower stations;high and steep slopes;safety management 1工程概况 2脚手架工程安全管理控制程序 锦屏一级水电站位于四川省凉山彝族自治州 为保证锦屏水电站脚手架工程实施过程安全 木里县和盐源县交界处的雅砻江大河湾干流河段,受控,制定了一套较为完善的管理程序,如图1 本工程中的双曲拱坝高305m 为当今世界第一高拱所示. 坝,电站装机6台,单机容量600MW.大坝左岸...
[关键词]水电站;拱坝;断层;复合灌浆;施工工艺 [中图分类号】TV543 [文献标识码】A [文章编号]1002-8498(2013)11-0057-03 Cement-chemistry Compound GroutingConstruction Technologyfor thefiunsFaultinJinping Luo Fei, Li Xiang (Chengdu Sinohydro Construction Engineering Co.,Lad.,Sinohydro Bureau 7Co.,Ld., Chengdu,Sichuan 611130,China) Abstract : The Jinping double-curvature arch dam is the highest arch dam in the world and it imposes very high requirements to the dam foundation.The ficis fault in the dam foundation needed to be treated by cement-chemistry pound grouting. This paper introduces the cement-chemistry pound grouting construction process for the f fault of Jinping double curvature arch dam,analyzes the grouting quality, discusses the differences between the grouting principles for chemistry grouting and cement grouting. Key words:hydroelectric power stations; arch dams; faults; pound grouting; construction 将水泥灌浆与化学灌浆合理地结合起来,充分发上。
2015年4月上 施工技术 第44卷第7期 CONSTRUCTION TECHNOLOGY 93 D0I:10.7672/5j52015070093 锚锭板对旋喷搅拌加劲桩支护刚度的 影响分析与计算 刘全林 (上海强劲地基工程股份有限公司,上海200233) [摘要]通过旋喷搅拌施工技术形成大直径的斜向水泥土桩体并设置由钢绞线和错锭板组成的锚固件,对铺固件 施加预应力,实现对软土边坡和基坑的支护.根据江苏靖江、浙江温州地区淤泥地层中旋喷搅拌加劲桩的静载检 测结果,验证了在加劲桩中设置错锭板及多块错锭板对提高其支护刚度的作用,分析了其对支护刚度的贡献.试 验结果表明,合理地设置错锭板可以有效提高加劲桩的极限承载力,降低其变形量.采用荷载传递原理对旋喷搅 拌加劲桩的受力变形特征进行理论分析,得到了旋喷搅拌加劲桩的支护刚度计算方法,与实测数据较为吻合. [关键词]基坑;支护;桩:加劲桩;锚锭板;刚度 [中图分类号]TU47[文献标识码]A [文章编号]1002-8498(2015)07-0093-06 Research and Calculation of the Effect of Series Connected Anchor Plates on the Uplift Stiffness of Jet Mixing Anchor Pile Liu Quanlin Shanghai Strong Foundation Engineering Co.Lad.Shanghai 200233 China) Abstract:The series anchor plates set inside the anchorage section can effectively reduce the contact stress and make the steel strand and the cement soil work as an entirety.The relative slip can be controlled by this special structure as well as the displacement of the anchor pile.The function of the anchor plates is verified by uplift tests in Jiangsu and Zhejiang province and the design is optimized by a series of parameter analysis with the finite element method.The test and finite element analysis show that a reasonable design of the series anchor plates can obviously raise the ultimate bearing capacity and reduce the deformation of the jet mixing anchor pile.Finally a theoretical calculation method for the load-displacement relationship of the jet mixing anchor pile is proposed based on the load-transfer theory. The calcul...
施工技术 2010年1月 90 CONSTRUCTION TECHNOLOGY 第39卷第1期 锚管复合土钉支护技术在砂卵石 地层深大基坑中的应用 王贵和,吕建国,贾苍琴,汪勉涛 (中国地质大学工程技术学院,北京100083) [摘要]北京国美商都属深大基坑支护工程.考虑到场地四周空阔,基坑土层以砂卵石地层为主,密实度高,具有 放坡条件,总体采用错管复合土钉墙支护.介绍支护结构组成,结构及施工工艺.通过现场试验,对基坑的水平位 移以及错管(土钉)的受力特性进行分析.结果表明基坑的水平位移很小,满足设计需求;土钉受力随施工进度逐 渐增大,尤其是退台的设置会引起退台效应,从而起到减荷和使应力重分布的作用. [关键词]基坑;砂卵石地层;支护;错管;复合土钉 [中田分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2010)01-0090-04 Application of Anchor Pipe Composite Soil Nailing Support Technology in Deep and Large Foundation Excavation in Sand-gravel Stratum Wang Guihe L Jianguo Jia Cangqin Wang Miantao School of Engineering and Technology China University of Geosciences Beijing 100083 China) Abstract:Beijing Gome Shopping City belongs to deep and large foundation excavation engineering. Considering conditions of the project such as wide surrounding building and dense sand-gravel stratum anchor pipe posite soil nailing is adopted as support structure.Composition structure and construction technology of the support structure are introduced.Field investigation of horizontal deformation for foundation excavation and force characteristics for soil nailing are done.The result indicates that the horizontal deformation is small which can meet design requirement;the tensile force of soil nailing grows with the construction process especially at the backslide which causes backslide effect and changing of stress distribution. Key words:foundation excavation;sand and gravel layer;support;anchor pipe;posite soil nailing 在基坑支护工...
2016年4月上 施工技术 第45卷第7期 CONSTRUCTION TECHNOLOGY 37 D0I:10.7672/8js2016070037 锚杆静压桩不卸载情况下桩孔内锚固封桩技术探索 李小玥,翁功伟 (中天建设集团有限公司,浙江杭州310020) [摘要]针对传统错杆静压桩封桩的不足之处,采用不卸载孔内错固封桩技术,即在桩顶施加荷载情况下封桩,待 封桩混凝土达到一定强度后撤去施加荷载,此时桩与基础能够立即发挥作用,从而有效减少建筑物附加沉降.通 过多个工程实践证明,改进的施工工艺能有效减少回弹效应及建筑物附加沉降,封桩后质量可靠. [关键词]桩;错杆静压桩;不卸载封桩:错固;施工工艺 [中图分类号]TU745.3 [文献标识码]A [文章编号]1002-8498(2016)07-0037-03 Exploration on the Technology of Sealing Pile Without Unloading in the Pile Hole of Anchor Jacked Pile Li Xiaoyue Weng Gongwei Zhongtian Construction Group Co.Lid.Hangzhou Zhejiang 310020 China) Abstract:According to the shortage of tradition sealing pile of anchor jacked pile the technology of sealing pile without unloading was adopted.Applied load seal at the top of the pile removed the applied load when the sealed concrete reached the intensity.Then the pile and foundation can play their roles immediately so as to effectively reduce building additional settlement.Through many engineering practiees the improved construction technology ean effectively reduce the rebound effect and the additional settlement of buildings the quality of the pile is reliable. Key words:piles;anchor jacked pile;sealing pile without unloading;anchor;construction 0引言 通过锚固架错固在桩孔内的改进工艺.改进的不 锚杆静压桩因其施工方便且能很快提供较高 卸载孔内铺固封桩工艺在宁波经过多个工程实践, 的承载力被广泛应用于建筑物地基加固、纠偏与基工艺施工可靠性强,取得了良好的经济效益和工程 础托换等工程中.由于施工经验的缺乏及施工单 效果. 位片面追求工期利益等因素的影响,一般在压桩结 1卸载封桩对建筑物沉降的影响 束后会卸下千斤顶、移除桩架,以便施工其余桩. 锚杆静压桩处理地基后建筑物常产生较大沉 然而,在错杆静压桩卸载的情况下封桩,桩体的回 降,与压桩卸载后桩的回弹、桩在封桩后未及时发 弹效应很容易导致建筑物产生附加沉降. 挥作用...
施工技术 2014年6月下 20 CONSTRUCTION TECHNOLOGY 第43卷第12期 D01:10.7672/sgjs2014120020 锚杆无损检测技术在洪屏抽水蓄能电站 地下厂房中的应用 杨涛,朱贤博 (武警水电第二总队,江西南昌330096) [摘要]基于江西洪屏抽水蓄能电站地下厂房工程的施工,根据地下洞室支护的要求和特点,对错杆的施工质量进 行无损检测试验研究,并对检测技术进行探讨.结果表明,无损检测技术丰富了隧洞围岩错杆质量检测手段,在地 下洞室工程建设中具有良好的应用前景. [关键词]地下厂房:锚杆;无损检测;应用 [中图分类号]TV554 [文献标识码]A [文章编号]1002-8498(2014)12-0020-04 Application of Anchor Nondestructive Testing Technology in Underground Powerhouse of Hongping Pumped-storage Power Station Yang Tao Zhu Xianbo No.2 Hydropocer Force of Armed Police Nanchang Jiangxi 330096 China) Abstract:Based on the construction of underground powerhouse of Jiangxi Hongping Pumped-storage Power Station Project according to the requirements and characteristics of underground tunnel support the experimental research of nondestructive testing are launched and the detection technology are discussed in this paper.The results show that the nondestructive testing technology enriches the tunnel surrounding rock bolt quality detection means.It has a good application prospect in the underground project construction. Key words:underground powerhouse;anchors;nondestructive testing;application 1工程概况 地下水丰富和施工强度高等特点,给施工支护带来 江西洪屏抽水蓄能电站装机容量为1200MW 一定难度.设计了各种规格的错杆共11.36万余 枢纽主要包括上水库、输水系统、地下厂房系统、地根,锚杆类型主要有:①全长黏结型砂浆锚杆直 面开关站及下水库等.地下厂房系统主要由主、副 径为16~36mm 长度L=2~12m:②水泥药卷错杆 厂房洞、进厂交通洞、母线洞、主变洞、主变运输洞、 直径为25mm 长6m;③中空注浆铺杆直径为 500kV出线洞、通风兼安全洞及各层排水廊道等洞32mm 长8m;④预应力中空注浆错杆直径为 室群组成.其中主、副厂房洞开挖尺寸为161m× 32mm 长9m;⑤自进式错杆直径为25mm 长 22mx51.1m(长x宽×高),主变洞开挖尺寸为 4.5~6m;⑥自进式中空注浆铺杆直径...