[关键词】桩基础;加压;嵌岩;长螺旋钻孔压灌桩;施工技术 [中图分类号]TU753.1 [文献标识码】A [文章编号】1002-8498(2015)09-0105-04 Application of Compression TypeRockSocketed Long SpiralDrillingandGroutingPile Hu Xiaobing',Hua Kun² (1.Ningbo Housing Design &Research Institute Co.,Lud.,Ningbo,Zhejiang 315040, China; 2.Huafeng Construction Co.,Lud.,Ningbo,Zhejiang 315040,China) Abstract;According to the geological condition of actual project,the pression type rock socketed long spiral drilling and grouting pile is selected after parison. This paper introduces the structure and the key parts checking of pile machine for pression type rock socketed long spiral drilling and grouting pile firstly. Then, construction process,operating keys and rock socketing quality standards are pointed out. It is proved that the pression type rock socketed long spiral drilling and grouting pile is applicable in all kinds of clay, silt, sand and the foundation with shallow buried weathered bedrock. Key words:piles; pression;rock socketed; long spiral drilling and grouting pile; construction 0引言 48222m²,地下建筑面积17566m²,基坑开挖深度为 沿海地区近年发展应用的一种新型桩基工艺,该桩剪力墙结构,2幢多层为框架结构。
施工技术 2016年12月上 58 CONSTRUCTION TECHNOLOGY 第45卷第23期 D01:10.7672/gjs2016230058 分段注浆止水技术在高水压盾构斜井施工中 的应用研究* 苏昂,曹勰2,李铮,何悦1 (1.西南交通大学交通隧道工程教育部重点实验室,四川成都610031; 2.神华新街能源有限责任公司新街项目部,内蒙古鄂尔多斯017212) [摘要]以新街台格庙矿区盾构施工煤矿斜井工程为依托,针对其高水压问题,在分析现有成果的基础上,提出分 段注浆止水、卸水降压措施.基于流-固耦合作用机理,通过使用FLACSD有限差分软件,对分段注浆止水效果进行 研究.研究结果证明:本工程条件下,分段注浆止水方式能够限制孔隙水压力<0.54MPa 主应力<4.40MPa 位移<0.980mm 满足隧道管片安全性要求,同时达到良好的止水效果,较好地解决了工程问题. [关键词]煤矿;斜井;盾构;高水压;分段注浆;流-固耦合 [中图分类号]TD262.1*2;TD421.5 [文献标识码]A [文章编号]1002-8498(2016)23-0058-04 Application of Waterproofing Technology with Section Grouting in Shield Construction with High Water Pressure for Inclined Shaft Su Ang' Cao Xie2 Li Zheng' He Yue' (1.Key Laboratory of Transportation Tunnel Engineering Ministry of Education Southicest Jiaotong University Chengdu Sichuan 610031 China:2.Xinjie Project Department of Shenhua Xinjie Energy Co.Ltd.Ordos Inner Mongolia 017212 China) Abstract:Based on a coal mine inclined shaft constructed by shield machine)in Taigemiao of Xinjie on the basis of relevant literature waterproofing with section grouting and water pressure reducing are put forward to deal with the unique high water pressure problems.Based on fluid-solid coupling mechanism the effect of waterproofing technology with section grouting is analyzed by finite difference software (FLAC3D).The results show that the waterproofing mode with section grouting can limit the pore water pressure lower than 0.54MPa the principal stress lower than 4.50MPa and displacement below 0.980m...
2010年12月 施工技术 第39卷第12期 CONSTRUCTION TECHNOLOGY 31 凤凰国际传媒中心圆弧轴线定位研究 王枭雄,李慧强,冯祥利 (北京天润建设工程有限公司,北京100077) [摘要]风凰国际传媒中心建筑外墙由9段不同直径、不同圆心的圆弧组成,圆弧墙体的定位成为本工程测量工作 的重点与难点.利用AutoCAD和全站仪建立平面、高程施工测量控制网,测量出控制点、弧度、距离,使用弦线支距 法确定圆弧墙体的位置.为了减小误差,达到精度要求,的弧形轴线加密到500mm一道.该方法可提高建筑 施工测量的精度,缩短施工工期从而增加经济效益. [关键词]圆弧轴线;测量控制网;定位 [中图分类号]TU311.4 [文献标识码]A [文章编号]1002-8498(2010)12-0031-03 Location Study for Arc Axis of Beijing Phoenix International Media Center Wang Xiaoxiong Li Huiqiang Feng Xiangli Bejing Tianrun Construction Engineering Co.Lad.Bejing 100077 China) Abstract:The outer building wall of Beijing Phoenix International Media Center consists of nine different diameter and circle center so location for arc wall is the difficulty for engineering measurement.By using AutoCAD and total station the plan and elevation measuring control nets are built up to measure control points radian and distance and chord offset method is applied to assure the position of arc wall.In order to decrease error and meet the precision requirement all the are axes are densified to 500mm.This method can improve measuring precision save construction period and increase economic benefit. Key words:arc axis:measuring control net;location 为满足顾客对工程产品越来越高的要求,提高工相互连接而成,南侧由一段不规则的曲面组成,两楼的 程质量是其中最重要的一环,而采用何种测量控制方中间区域由一些圆弧及矩形轴网连接而成.因此,圆 法对施工质量进行控制,将直接影响工程质量的好坏.弧墙体的定位就成为本工程测量工作的重点、难点. 圆弧结构施工测量方法有:半径圆心画圆法、弦线支距 2控制网的布设 法、极坐标法和交会法等. 2.1平面控制网的布设 1工程概况 根据测绘公司提供的A(G2) B C G1号及G3号 风凰国际传媒中心位于北京市朝阳区朝阳公园西5个已知平面控制点位(经过对5个平面坐标点位进 南角,占地面积1.88hm2 ...
施工技术 2016年9月上 98 CONSTRUCTION TECHNOLOGY 第45卷第17期 D0I:10.7672/sgjs2016170098 冻融循环对橡胶沥青混合料性能影响试验研究* 王海鹏,李洪峰 (东北林业大学工程咨询设计研究院,黑龙江哈尔滨150040) [摘要]为了探究多次冻融条件下,橡胶沥青混合料性能指标的变化是否呈现规律性,根据以往的研究成果,选取 合适的冻融方法和混合料配合比,通过试验研究了冻融循环对橡胶沥青混合料性能的影响规律.结果表明:橡胶 沥青混合料的性能受冻融循环及冻融循环次数的影响较为明显,变化幅度较大.随着冻融循环次数增加,混合料 的劈裂强度、劲度模量指标呈现出明显的减小趋势,而拉伸应变指标呈现出明显的增大趋势;以抗冻性为主的沥青 混合料的配合比不宜选用低油石比、大空隙率的橡胶沥青混合料,混合料的空隙率在3.5%~5.0%范围抗冻融性 能最优. [关键词]公路工程;橡胶沥青;冻融循环;劈裂强度;拉伸应变;劲度模量 [中图分类号]U414 [文献标识码]A [文章编号]1002-8498(2016)17-0098-05 Experimental Study on the Influence of Freeze-thaw Cycles on the Properties of Rubber Asphalt Mixture Wang Haipeng Li Hongfeng Engineering Consulting Design Institute Northeast Forestry University Harbin Heilongjiang 150040 China) Abstract:To explore the properties changing law of the rubber asphalt mixture under freeze-thaw condition based on the results of previous research this paper selected appropriate freeze-thaw method and mixture mix proportion studied the influence rule of freeze-thaw cycles on rubber asphalt mixture properties through indoor test.The results showed that:the freeze-thaw cycles had a large effect on the mixture properties the splitting strength and stiffness modulus decreased with the number of freeze-thaw cycles increases conversely the tensile strain increased with the number of freeze-thaw cycles increases. The mixture mix proportion should not choose lower asphalt-aggregate ratio and larger void ratio for frost- resistance purpose the frost-resistance property of the mix...
施工技术 2012年1月上 24 CONSTRUCTION TECHNOLOGY 第41卷第356期 冻结围护在浅层地表基坑工程中的应用 林秀桂,袁森林 (上海市政工程设计研究总院(集团)有限公司,上海200092) [摘要]在城市繁华中心进行原有地下通道的改造和扩建,通常面临环境复杂、管线密布、交通限制等问题,改造工 程势必影响周围居民正常生活和区域社会功能发挥.通过冻结围护在上海轨道交通3 4号线大统路节点改造工 程的成功应用,总结了浅层地表冻结围护设计和施工控制技术的重要参数,介绍了冻结融沉的影响与控制技术以 及融沉注浆对结构的影响. [关键词]地下工程;基坑;围护;冻结法;注浆孔;融沉 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2012)01-0024-04 Application of Frozen Retaining Structure in Shallow Foundation Excavation Construction Lin Xiugui Yuan Senlin Shanghai Municipal Engineering Design Institute Group)Co. Ld.Shanghai 200092 China) Abstract:Rebuilding and expanding of the original underground passage in the bustling city center always face the plex environment densely pipeline traffic restrictions and other issues.The rebuilding project is bound to affect the normal life of residents and the surrounding social functioning.Through the success application of frozen retaining structure technique in shallow foundation excavation construction in Shanghai Rail Transit Line 3 4 and Datong Road reconstruction some key parameters of design and construction control technique are summed up.Authors introduce effect and control technology of frozen thawing settlement and thaw settlement grouting effect on structures. Key words:underground;foundation excavation;retaining support;freezing method;grouting hole; thawing settlement 人工地层冻结法(artificial ground freezing 1工程概况 AGF)简称“冻结法”,最早由德国工程师F.H. 大统路地道改扩建工程南起天目西路,北至芷 Poetch于1880年提出,是利用人工制冷技术,使地江西路,全长1.26km 如图1所示.地道铁路以南 层中的水结冰,把天...
2011年7月上 施工技术 第40卷第344期 CONSTRUCTION TECHNOLOGY 47 冻土地区工程桩负摩阻力试验研究 孙建波,徐春华,徐学燕2 (1.哈尔滨工业大学建筑设计研究院,黑龙江哈尔滨150090; 2.哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090) [摘要]在太阳辐射热的条件下,考虑冻土工程性质的变化,进行室内冻土与混凝土圆柱间负摩擦力试验,分析负 摩擦力f与土融沉量S变化关系f.=f(S) 分析不同含水量条件下负摩擦力f与土融沉量S的时程关系曲线及两 者变化关系和含水量对负摩擦力f.、融沉量的影响.计算活动层的融沉及负摩擦力的发展对桩基承载力衰减影 响,即夏季冻土融化时,正融土中桩的承载能力衰减了8%左右. [关键词]冻土;负摩阻力;融沉量;含水量;衰减 [中图分类号]TU475.2 [文献标识码]A [文章编号]1002-8498(2011)13-0047-04 Test Research on Negative Friction of Engineering Pile in Permafrost Regions Sun Jianbo' Xu Chunhua' Xu Xueyan2 (1.The Architectural Design and Research Institute Harbin Institute of Technology Harbin Heilongjiang 150090 China; 2.School of Civil Engineering Harbin Institute of Technology Harbin Heilongjiang 150090 China) Abstract:Due to the qualitative change of frozen soil engineering the laboratory test was carried out on the negative friction force between frozen soil and concrete pile.The affection of thaw collapse of active soil layer and the development of negative friction on the attenuation of bearing capacity of pile foundation is calculated and the relation curves are analyzed with different water content such as f.=f(S) S=f (t)f =f(t).In summer bearing capacity of pile decreases with 8%of active thawing soil. Key words:permafrost;negative friction;thaw quantity;water content;attenuation 夏季由于太阳辐射热在多年冻土层上部存在着1模型试验 季节活动层,夏融冬冻.计算分析正融冻结土沿单 按土工试验规程,试样大小:混凝土圆柱周长为 桩表面的抗剪强度具有极大意义.这个问题的现实21.68cm 埋入冻土深度为50cm.土样为哈尔滨粉 性是因为在工程建(构)筑物营运期间,多年冻土经 质黏土,含水量分别为17.4%,20.44%,24.04%, 常从坚硬冻结状...
施工技术 2014年10月上 94 CONSTRUCTION TECHNOLOGY 第43卷第19期 D0I:10.7672/5js2014190094 光纤光栅传感器在FRP土钉现场拉拔试验中的应用* 金清平,郑祖嘉,雷学文 (武汉科技大学城市建设学院,湖北武汉430065) [摘要]FRP不同于钢筋材料特性,FRP土钉与灌浆材料的黏结力分布与发展规律等作用机理一直是研究的难题 和急需解决的问题.通过在FRP土钉中埋设光纤光栅传感器,并将FRP土钉用于实际边坡支护,在施工完成后进 行现场拉拔力测试试验,测定短期拉拔力作用下FRP土钉的受力特性,分析表明:FRP土钉承担了支护作用;受力 初期钉体近端先承力;随着拉拔力增大,钉体各点受力增长率不一致,近端初期增长较快,到一定拉拔力后,钉体各 点拉拔力增长率趋于常数;钉体各位置承载力的变化趋势最后均呈现一致性,但大小不均匀. [关键词]边坡防护:光纤光栅;FRP土钉;支护;拉拔试验 [中图分类号]TU413.4 [文献标识码]A [文章编号]1002-8498(2014)19-0094-04 Application of FBG Sensor in FRP Soil Nailing Pull-out Tests Jin Qingping Zheng Zujia Lei Xuewen (School of Urban Construction Wuhan University of Science and Technology Wuhan Hubei 430065 China) Abstract:Different from reinforcement material properties adhesion distribution and development law between FRP (fiber reinforced plastics)soil nailing and the grout have been urgent research problems. FBG sensors were embedded in FRP soil nailing and used for the actual slope support.After pletion of the construction field pull-out force tests were done to measure force characteristies of FRP soil nailing.The analysis shows that FRP soil nailing assumed the supporting function.At the beginning the proximal soil nailing withstand pull-out force.With the pull-out force increasing the force growth is inconsistent in different points of soil nailing proximal soil nailing has more rapid growth early after a certain pulling force points tested of soil nailing tend to a constant growth in pull-out force.The force on soi...
2013年3月下 施工技术 第42卷第6期 CONSTRUCTION TECHNOLOGY 55 D0I:10.7672/5gjs2013060055 价值工程在国际EPC项目中的应用研究* 李健,王力尚2,朱建潮2 (1.中建股份有限公司海外事业部,北京100125;2,中建中东有限贵任公司) [摘要]国际工程项目常采用设计加建造的总承包模式,这种总承包模式对承包商的项目分析能力和成本控制能 力提出了更高的要求,设计过程中的价值工程就成了项目分析和成本控制的关键和必不可少的一部分.价值工程 可寻找出工程建设项目中重点改进的研究对象,提高建设项目的整体价值.阐述如何对国际EPC项目进行价值工 程分析. [关键词]总承包;设计加建造;EPC项目;价值工程 [中图分类号]TU723.3 [文献标识码]A [文章编号]1002-8498(2013)06-0055-03 Research on Application of Value Engineering in International EPC Project Li Jian' Wang Lishang2 Zhu Jianchao2 (1.China State Construction Engineering Ltd.Overseas Operations Beijing 100125 China; 2.China State Construction Engineering Corporation Middle East L.L.C.) Abstract:Design build is the main contracting model adopted by international construction projects which poses a higher requirement for the general contractor's ability in project analysis and cost control. Value engineering in design stage is a critical and necessary part for project analysis and cost control. Value engineering can identify the key object to improve and enhance the overall value of the construction project.This article elaborates how to implement the value engineering in international EPC projects. Key words:general contractor;design build;EPC project;value engineering 价值工程是我国建筑承包商走出国门、走向世engineering-procurement-construction)/交钥匙工程合 界必须经历的第一课.国内很多图集(比如 同条件》,这种方式项目的最终价格和要求的工期 GB101)及设计规范的存在,一方面为施工提供了依 具有更大程度的确定性,由承包商承担项目的设计 据,同时也限制了施工人员的思想,没有发掘出广 和实施的全部职责,雇主介入很少.交钥匙工程的 大建筑承包商的潜能和价值工程(优化设计、深化 通常情况是,由承包商进行全部设计、采购和施工 设...
施工技术 2012年3月上 86 CONSTRUCTION TECHNOLOGY 第41卷第360期 二灰土静态三轴力学性质试验研究 徐奋强,方庆军2,陈艳丽2 (1.南京工程学院建筑工程学院,江苏南京211167; 2.河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098) [摘要]通过不排水三轴压缩试验对二灰土的力学特性研究,从应力应变关系、抗剪强度、围压对强度的影响以及 残余强度4个方面,分析了围压与压实度比对二灰土土体强度、变形和刚度的影响.试验结果表明,随着围压与压 实度的增加,土体的强度与刚度均增加,应力-应变特性表现为软化型.压实度增加时强度增加不明显,仅为 10% 而围压增加时强度增加幅度较大,能达到45%,峰值应力和残余应力都有所增加,围压增加时,应力-应变关 系的弹性范围增大,曲线呈弱应变软化型或理想的弹塑性. [关键词]道路工程;二灰土;三轴试验;抗剪强度;力学性质 [中图分类号]TU411.5 [文献标识码]A [文章编号]1002-8498(2012)05-0086-03 Study on Mechanics Behavior of Lime-ash Soil Under Static Triaxial Tests Xu Fenqiang' Fang Qingjun2 Chen Yanli2 (1.College of Architecture and Civil Engineering Nanjing Institute of Technology Nanjing Jiangsu 211167 China; 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:Undrained triaxial pressive tests are carried out on lime-ash soil to investigate the effect of confining pressure and degree of paction on the shear strength shear deformation.The test results show that with the increase of confining pressure and degree of paction the strength and stiffness increase and the relationship of stress-strain is the strain-softening.With the increase of degree of paction the shear strength increase is only 10% but it increases to a larger extent at 45%as the confining pressure increased and the peak stress and residual stress is increasing.The range of elasticity of stress and strain will increase when confining pressure inc...
2012年2月上 施工技术 第41卷第358期 CONSTRUCTION TECHNOLOGY 95 二灰土的压实渗透特性研究 徐奋强1,方庆军2,陈艳丽2,沈正1 (1.南京工程学院建筑工程学院,江苏南京211167;2.河海大学岩土力学与堤坝 工程教育部重点实验室,江苏南京210098) [摘要]二灰土在高等级公路底基层中得到广泛应用,但是对二灰土渗透特性的研究较少.通过二灰土的基本物 理性质试验,系统地研究含水率、压实度这两个因索对二灰土的抗压强度及渗透性的影响,获得二灰土压实度与渗 透系数及无侧限强度之间的关系特点. [关键词]公路;二灰土;压实度;试验;渗透系数 [中图分类号]U416.1 [文献标识码】A [文章编号]1002-8498(2012)03-0095-03 Study on Compaction and Permeability Performances of Lime-ash Soil Xu Fenqiang' Fang Qingjun2 Chen Yanli Shen Zheng (1.College of Architecture and Ciwil Engineering Nanjing Institute of Technology Nanjing Jiangsu 211167 China: 2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:Lime-ash soil is used widely in the base layer of high-level road but little study is done on permeability performance of the soil.The study of the basic physical properties of lime-ash soil is developed.However after studying the influences of the moisture content degree of paction on the pression and the permeability of lime-ash soil and analyzing the relationship between degree of paction and unconfined shear strength of lime-ash soil we e to a result that the basic physical parameters of lime-ash soil may change a lot even within specification requirements by many experiment of basic physical characteristic of lime-ash soil. Key words:roads;lime-ash soil;degree of paction;test;permeability characteristic 目前二灰土在高等级公路底基层中得到广泛JTJ034一2000规定的技术指标.粉煤灰为硅铝粉煤 使用,也是...
2012年1月下 施工技术 第41卷第357期 CONSTRUCTION TECHNOLOGY 31 东莞台商大厦鱼腹曲面外框钢柱测量技术 杨文军,黄波,姜滨厚,程锋 (中国建筑第八工程局有限公司广州分公司,广东广州510665) [摘要]东莞台商大厦为核心筒混凝土外框钢结构,外框钢结构为鱼腹式曲面结构.根据超高层鱼腹曲面外框 钢柱的特点,详细介绍了施工测量和质量控制的过程,并对施工测量过程中的问题和测量方法进行探讨.通过该 技术的应用,确保测量结果的高精确性、可靠性和及时性,极大地改进了施工方法、施工工艺,取得了良好的经济效 益和社会效益. [关键词]钢结构;钢柱;鱼腹曲面;测量 [中图分类号]TU198.6 [文献标识码]A[文章编号]1002-8498(2012)02-0031-03 Measurement Technology of Fish-bellied Steel Column for External Frame in Dongguan Taiwan Business Association Tower Yang Wenjun Huang Bo Jiang Binhou Cheng Feng China Construction Eighth Engineering Ditision Co.Ltd.Guangzhou Branch Guangzhou Guangdong 510665 China) Abstract:Taiwan Business Association Tower is an posite structure with reinforced concrete core tube and external steel frame the fish-bellied steel frame is plex.Combining with characteristics of fish- bellied steel column for high-rise buildings the construction measurement and quality control methods are introduced in detail and the problems and measurement methods are discussed.By the measurement technology the high precision reliability and betimes of measure results are ensured.The construction technology is improved and economic and social benefits are good. Key words:steel structures;steel columns;fish-bellied surface;measurement 1工程概况 东莞台商大厦是一座集办公、酒店、商务会所 钢结构鱼嘴形屋顶 为一体的超高层建筑.结构形式为核心筒混凝土 钢管混凝士核心 筒中的钢管 外框钢结构.地下4层,地上68层,高达289m 总建筑面积28万m2 钢结构总用量为1.4万t(见 图1). 2钢柱定位测量特点 塔楼钢管混凝士 柱中钢管 1)钢结构外框立柱共18根,竖向斜率为2%~ 3% 随着楼层增高,先向外倾斜至29层最大后向核 H型钢框架梁 心筒收敏,立面整体呈“鱼腹曲线”(见图2). ...