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). ...