粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2016NO.5 试验与应用 水泥土无侧限抗压强度的尺寸效应* The Size Effect of Unconfined Comprehensive Strength of Cement-soil 王珍兰,陈艳丽,储冬冬,黄根民,刘华强 (江苏省水利科学研究院材料结构研究所,江苏扬州225002) 摘要:针对当前水泥土搅拌桩防渗墙强度的现场检测与室内强度试验,存在试样的尺寸不统一,不同尺寸之间的 强度无法进行换算的问题。通过试验,分析了不同尺寸和形状的水泥土无侧限抗压强度之间的尺寸效应,并通过线性回 归的方法,得出了不同尺寸和形状的水泥土的无侧限抗压强度换算关系,对解决水泥土搅拌桩防渗墙墙身强度检测中不 同尺寸和形状的试件所导致的强度差异问题,具有很好的指导性和实用性。 关键词:水泥土;无侧限抗压强度;尺寸效应 中图分类号:TU411.6 文献标识码:A 文章编号:1005-8249(2016)05-0045-04 Wang Zhenlan,Chen Yanli,Chu Dongdong,Huang Genmin,Liu Huaqiang Materials and structural engineering department,Jiangsu hydraulic research institute,Yangzhou Jiangsu 225002) Abstract:There are the problems that the sample size is not uniform and strength between different sizes can not be conversed in the current site inspection and laboratory test of the mixing cement-soil wall.Based on the laboratory test of the mixing cement-soil,variation of the unconfined prehensive strength UCS)was analysised with different sizes and shapes.Through regressive analysis on the laboratory testing of cement-soil, the conversion relation among UCS of cement-soil with different sizes and shapes were obtained.This study is helpful and practical for ...
粉煤灰综合利用 2018N.2 FLY ASH COMPREHENSIVE UTILIZATION 建筑科技 正交试验法在再生轻骨料混凝土配合比设计中的应用 Application of Orthogonal Test Method in Mix Proportion Design of Recycled Lightweight Aggregate Concrete 苏利全1,王锋1,段文杰2 (1.河北建研工程技术有限公司,石家庄050227 2.山东理工大学建筑工程学院,淄博25500) 要:利用碎砖为主的建筑垃圾与陶粒制备再生轻骨料混凝土,采用正交试验的方法对再生轻骨料混凝土的配 合比进行研究,研究了水胶比,粉煤灰掺量、砂率,再生骨料掺量对混凝土抗压强度,强质比,坍落扩展度的影响规 律及显著性。通过对试验结果分析,结果表明水胶比对混凝土的28d强度影响最大,其次粉煤灰掺量,再生骨料取代 率,砂率的影响较小。对于扩展度的影响因素从大到小排序依次是:粉煤灰的掺量、水胶比、砂率、再生骨料的取代率。 当粉煤灰的掺量30%左右,再生轻骨料混凝土的扩展度最高,和易性较好,混凝土的28d强度最高。碎砖颗粒的掺量 40%的时候,使得混凝土的强度达到最高。 关键词:再生轻骨料混凝土;工作性;强度;正交设计 中图分类号:TU528.2 文献标识码:A 文章编号:1005-8249(2018)02-0078-04 Su Liquan' ,Wang Feng ,Duan Wenjie ( 1.Hebei Institute Engineering Technology Co .,.,ShiJiaZhuang ,050227 ; 2 .School of Civil Engineering ,Shandong University of Technology ,ZiBo ,25500. ) Abstract :Recycled lightweight aggregate concrete was made with construction waste and ceramsite brick mainly including brick .Using the orthogonal test method ,the mix proportion of recycled lightweight aggregate concrete was studied .The influence regularity and significance of water binder ratio ,fly ash ,sand ratio ,the amount of recycled aggregate proportion on the pressive strength of...
粉煤灰综合利用 FLY ASH COMPREHIENSIVE UTILIZATION 2017no.1 试验与应用 正试验法在低掺量碱渣全固废混凝土中的应用 Application of Orthogonal Test Method in Low Alkaline Solid Waste Concrete 李亚齐,倪文,徐东,高巍 (北京科技大学土木与资源工程学院,北京100083) 摘要:采用正交试验方法对低碱渣全固废碱渣混凝土的配合比进行研究,考察了碱渣、脱硫石膏和钢渣三个因 素的掺量对混凝土抗压强度和坍落度的影响情况结果表明影响混凝土整体性能因素的大小为;钢渣>脱硫石膏>碱渣。 通过对试验结果的均值、极差分析,从而得出碱渣因素对混凝土性能影响最大,确定各因素的比例关系为碱渣:脱硫 石膏:钢渣=1:2:5。对净浆试块进行微观分析,发现胶凝体系中生成的钙矾石和C-S-H凝胶是贡献混凝土强度的主 要因素。 关键词:碱渣;全固废混凝土;正交试验;抗压强度;坍落度;钙矾石;c-s-H凝胶 中图分类号:TU528 文献标识码:A文章编号:1005-8249(2017)01-0029-05 Li Yaqi ,Ni Wen ,Xu Dong ,Gao Wei Civil and Resource Engineering and Resource ,University of Science and Technology Beijing ,Beijing 100083 ,China ) Abstract :In this paper ,orthogonal test method was used to study the mix proportion of alkali slag solid waste concrete ,and the effects of alkali slag ,desulphurization gypsum and steel slag on the pressive strength and slump of concrete were investigated .The results show that the factors affecting the overall performance of concrete size is ;steel slag >desulfurization gypsum >alkali sludge .Through the mean and range analysis of the test results ,it is concluded that the alkali sludge has the greatest influence on the concrete perfo...
施工技术 2014年1月下 32 CONSTRUCTION TECHNOLOGY 第43卷第2期 D0I:10.7672/sgj82014020032 椭圆形钢结构弧形钢梁分段吊装拼装技术 孙群伦1,林滨滨1,傅林波2 (1.浙江建设职业技术学院,浙江杭州311231;2.浙江中南建设集团钢结构有限公司,浙江杭州310052) [摘要]某会展中心建筑平面造型近似椭圆形,屋顶结构为近似椭圆体钢结构.通过介绍椭圆形钢结构弧形钢梁 分段吊装拼装施工特点和难点,详细闸述了弧形钢梁分段吊装拼装施工流程、施工要点、质量控制措施与仿真分析 结果.实践证明分段吊装拼装技术方法可靠,能够最大限度地减少对施工场地的要求,提高施工质量,减少机械吊 装台班量与难度,节约施工成本. [关键词]钢结构;弧形钢梁;吊装;拼装;质量控制 [中图分类号]TU758.1 [文献标识码]A[文章编号]1002-8498(2014)02-0032-03 Segmental Hoisting and Assembly Technology of Oval Steel Structure Arc Steel Beams Sun Qunlun' Lin Binbin' Fu Linbo2 (1.Zhejiang College of Construction Hangzhou Zhejiang 311231 China; 2.Zhejiang Zhongnan Group Steel Structure Co.Ltd.Hangzhou Zhejiang 310052 China) Abstract:A conference and exhibition center is oval plan whose roof is oval steel structure.By analyzing the characteristics and difficulties of segmental hoisting and assembly construction of the oval steel structure arc beam the arc beam segmental hoisting and assembly construction construction points quality control measures and the results of the simulation analysis are described in detail.Practice has proved that the segmental hoisting and assembly technology is reliable can minimize the construction site requirements improve the construction quality reduce the rent amount and difficulty of hoisting machinery and save the construction cost. Key words:steel structures;arc steel beam;hoists;assembly;quality control 1工程概况 柱,其中劲性钢骨规格为口500×500×16,框架柱柱 某会展中心建筑平面造型近似椭圆形,屋顶结底标高为-1.650m 框架柱柱顶的最大标高约为 构为近似椭圆体钢结构(见图...
2017年9月下 工技术 第46卷第18期 CONSTRUCTION TECHNOLOGY do:10.7672/sgjs2017180011 椭圆形不连续支承弦支穹顶预应力施工技术* 于敬海12,冷明13,张俊铎,鲍敏 (1.天津大学建筑工程学院,天津3000722.天津大学建筑设计研究院,天津300073 3.中国电建集团中南勘测设计研究院有限公司,湖南长沙410000:4.天津三建建筑 工程有限公司,天津300171:5.北京市建筑工程研究院有限责任公司,北京100039 摘要]针对不连续支承椭圆形弦支穹顶结构,通过施工全过程分析,确定了适用于该类结构的分步分级张拉径向 杆的预应力施加方法。根据结构特点,设立了合理的施工张拉控制方法,实现了预应力体系的建立和结构的成型。 对施工过程中的网壳起拱值进行监测,结果表明现场监测值与理论计算值吻合较好。此外,对放样误差进行统计 分析发现,该误差对结构受力状态和最终起拱值影响较小。这说明了以索力控制为主,挠度控制为辅的控制标准 能够满足设计要求。 关键词]钢结构;索结构预应力弦支穹顶;施工过程;分级张拉;施工技术 中图分类号】TU391 文献标识码]A 文章编号1002-8498(2017)180011-04 Prestressed Construction Technology of Suspendome Structure with Discontinuous Support YU ,LENG ,ZHANG Junduo ,BAO ( 1.School of Civil Engineering ,Tianjin Unitersity ,Tianjin 300072 ,China 2 .Architectural Design and Research Institute of Tianjin Unirersity ,Tianjin 300073 ,China ;3 .Hydro China Zhongnan Engineering Co ..Changsha ,Hu' nan 410000 ,China 4 .Tianjin No .3 Construction Engineering Co .., Tianjin 300171 ,China ;5 .Beijing Building Construction Research Institute Co ..Beijing 100039 ,China ) Abstract :A step by step tension method is designed for suspended-dome structure with discontinuous support .A construction control method which is ...
[关键词]高层建筑;悬挑桁架;铸钢节点;有限元分析;试验 [中图分类号】TU323.4 [文献标识码】A [文章编号]1002-8498(2013)14-0005-03 SafetyPerformanceResearchontheCastSteelJointin GiantCantilever Truss of TongluLegendaleHotel Zhou Xiaofei,Zhou Guan'gen,Sha Xueyong (Zhejiang Southeast Space Frame Co.,Ld.,Hangzhou,Zhejang311209,China) Abstract;Giant cantilever steel truss is often used in the building with long plex facade.Because of the structure plexity,cast steel is often used in the connection joints of stecl members.Because there is no any calculation formula for the cast steel joints at home and abroad, the experiment and FEA are the most effective method in testing this kind of joints.The safety performance of cast steel joints sample in long cantilever steel truss of Legendale Hotel is tested by full scale experiment and FEA method, and other joints are tested by FEA method.The verification method not only can guarantee the security of cast steel joint, but also is economic.Safety performance research on the cast steel joint in giant cantilever stel truss of Legendale hotel is described in detail in this paper. Key words:tall buildings; cantilever truss; cast steel joint; finite element analysis; testing 1工程概况 2节点构造 励骏酒店位于浙江省桐庐县城富春江畔,该工 因铸钢节点在结构中所处的位置不同,其构造 程由主楼、东西裙房及地下室组成,总建筑面积 也有所不同,出于经济及工期的考虑,工程仅对其 81000m²。
[关键词]高层建筑;悬挑桁架;铸钢节点;有限元分析;试验 [中图分类号】TU323.4 [文献标识码】A [文章编号]1002-8498(2013)14-0005-03 SafetyPerformanceResearchontheCastSteelJointin GiantCantilever Truss of TongluLegendaleHotel Zhou Xiaofei,Zhou Guan'gen,Sha Xueyong (Zhejiang Southeast Space Frame Co.,Ld.,Hangzhou,Zhejang311209,China) Abstract;Giant cantilever steel truss is often used in the building with long plex facade.Because of the structure plexity,cast steel is often used in the connection joints of stecl members.Because there is no any calculation formula for the cast steel joints at home and abroad, the experiment and FEA are the most effective method in testing this kind of joints.The safety performance of cast steel joints sample in long cantilever steel truss of Legendale Hotel is tested by full scale experiment and FEA method, and other joints are tested by FEA method.The verification method not only can guarantee the security of cast steel joint, but also is economic.Safety performance research on the cast steel joint in giant cantilever stel truss of Legendale hotel is described in detail in this paper. Key words:tall buildings; cantilever truss; cast steel joint; finite element analysis; testing 1工程概况 2节点构造 励骏酒店位于浙江省桐庐县城富春江畔,该工 因铸钢节点在结构中所处的位置不同,其构造 程由主楼、东西裙房及地下室组成,总建筑面积 也有所不同,出于经济及工期的考虑,工程仅对其 81000m²。
2013年7月下 施工技术 第42卷第14期 CONSTRUCTION TECHNOLOGY D0I:10.7672/sgjs2013140001 桐庐励骏酒店巨型悬挑桁架支撑体系卸载关键技术 沙学勇,周观根,周小斐 (浙江东南网架股份有限公司,浙江杭州311209) [摘要]桐庐励骏酒店钢结构工程施工难点在于采用了大跨度巨型悬挑结构,最大悬挑长度达36m 其安装技术对 主体结构整体性影响较大,在安装过程中对悬挑部分的支撑架卸载过程进行了三维仿真分析,并对悬挑结构进行 了卸载过程中结构变形的监测.通过分析和监测,指导本工程的施工安装过程. [关键词]高层建筑;悬挑桁架;有限元分析;支撑架;卸载;监测 [中图分类号]TU731.2 [文献标识码]A[文章编号]1002-8498(2013)14-0001-04 Key Unloading Technology of the Bracing System for Giant Cantilever Truss of Tonglu Legendale Hotel Sha Xueyong Zhou Guan'gen Zhou Xiaofei (Zhejiang Southeast Space Frame Co. Ltd.Hangzhou Zhejiang 311209 China) Abstract:The construction difficulty of Legendale Hotel lies in the long-span giant cantilever truss used for the steel structure engineering.The maximum cantilever length is up to 36m and the installation technology of cantilever has great influence on the main structure integrity.The 3D digital simulation of the unloading process of the cantilever bracing system was conducted during installation and the deformation monitoring of the cantilever was carried out during unloading process.The result of analysis and monitoring is used to guide the construction of this project. Key words:tall buildings cantilever truss;finite element analysis;supports;unloading;monitoring 1工程概况 励骏酒店位于浙江省桐庐县城富春江畔,为桐 庐县标志性建筑.该工程主要由1幢高层酒店宾 馆、2层地下室及其他建筑(东西裙房)组成,总建筑 面积81000m2 总高度为157m 主楼39层,为钢框 架-钢筋混凝土核心筒结构(见图1).主楼大堂入 口的上方设有大悬挑楼层,该悬挑楼层共5层(2F ~7F 建筑标高10.200~35.700m) 最大悬挑长度 36m(见图2),桁架的主要上、下弦杆和斜、竖腹杆 采用焊接箱形截面,次要弦杆采用焊接H型钢或热 轧H型钢,节点区采用64个铸钢件节点.桁架间 ...
[关键词】隧道工程;边坡滑移;衬砌;开裂;监测 [中图分类号]TU745.3;U459.2 [文献标识码】A [文章编号]1002-8498(2012)19-0090-03 Disease Analysis onFront Slope Sliding and Lining Cracks of Taoziwo Tunnel Zhou Wenxu,Chen Junfeng (CCCC Highway Consultants Co.,Ltd.,Beijing 100084,China) Abstract;Taoziwo tunnel is a small interval separated tunnel.Shallow bury and unsymmetrical pressure phenomena were observed in entrance region. During the construction of the entrance region, front slope sliding and lining crackings occurred.By presensive consideration of the surface displacement monitoring and topographic and geologic conditions,this paper analyzed the reason for these disasters from diferent aspects such as the geological conditions, construction disturbance and precipitation. Comprehensive treatment plan was proposed,which can maintain the slope stability and strengthen the tunnel. Key words:tunnels; slope sliding; linings; cracks; monitoring 浅埋隧道施工中常常同时出现隧道衬砌开裂 桃子窝隧道所处的区域属低山、丘陵地貌,其 与边坡滑移等病害,通常认为其主要原因是隧道开 进口处于陡山坡上(自然坡度为25°~50°),山体 挖引起边坡滑移,边坡滑移反之又导致衬砌开裂。
2011年10月下 施工技术 第40卷第351期 CONSTRUCTION TECHNOLOCY 53 桃园二号隧道施工技术研究 程浩,周建春 (华南理工大学土木与交通学院,广东广州510640) [摘要]桃园二号隧道位于广州增城至从化高速公路中段从化境内,隧道地质构造复杂,岩体破碎.为确保施工安 全,减少和避免地质灾害的发生,采用新奥法施工.详细介绍关键工序及工艺控制,并采用TCP206及LTD2100技 术进行超前地质预报,有效提高了速度分析精度和构造定位精度,采用动态设计与信息化施工,通过超前地 质预报系统、监控量测等手段,对施工信息进行采集、分析、,在确保施工安全、优化设计等方面取得较好效果. [关键词]隧道工程;超前地质预报;监控:施工技术 [中图分类号]U455.4 [文献标识码]A[文章编号]1002-8498(2011)20-0053-04 Research on Construction Technology in No.2 Taoyuan Tunnel Cheng Hao Zhou Jianchun School of Civil Engineering and Transportation South China University of Technology Guangzhou Guangdong 510640 China) Abstract:No.2 Taoyuan tunnel is a segment of Zengcheng-Conghua expressway in Conghua and the geological structure is plex and the rock is fragmented.Therefore new austrian tunneling method is adopted to ensure the safety of the construction and to eliminate geological hazard.The key process and technology are introduced.The advanced prediction of TGP206 and LTD2100 is applied.Then the application shows that the advanced prediction can effectively improve the precision of the velocity analysis and structure location.Dynamic feed-back design and information-aided construction are executed for the tunnel.By advance geological forecasting system and monitoring the construction information is collected analyzed and feed-back.At last good effects are achieved for ensuring the construction safety and optimizing the design. Key words:tunnels;advanced geological forecasting;monitoring;construction 1工程概况...
2011年12月上 施工技术 第40卷第354期 CONSTRUCTION TECHNOLOGY 桃园1号隧道施工监测技术 靳子良,周建春 (华南理工大学土木与交通学院广东广州510640) 摘要]在桃园1号隧道工程施工过程中,通过现场监控来掌握隧道围岩与支护结构的工作状况和安全信息及时 预见险情,为调整和修改支护设计参数以及改变施工方法提供重要的依据,从而保证施工安全和降低工程造价。 主要从地表沉降、拱顶下沉和周边收敛、钢支撑内力、二次衬砌的应力等几个方面对监控量测的实施与分析进行了 介绍。 关键词】隧道工程;监测沉降;收敛;内力 中分类号】U456.3 [文献标识码]A [文章编号]1002-8498(2011)23-0053-04 Construction Monitoring Technology in Taoyuan No .1 Tunnel Jin Ziliang ,Zhou Jianchun ( Schoolof Engineering and Transportation ,South China Uninersity Technology ,Guangzhou Guangdong 510640 ,China ) Abstract :In construction of Taoyuan No .tunnel ,the authors master work conditions and safety information of surrounding rock and support structure based on site monitoring to provide reference for adjusting and modifying support parameters in order to ensure construction safety and reduce the cost . Implementation and analysis of monitoring are introduced in detail from ground settlement ,vault crown settlement ,peripheral convergence ,internal force steel support and stress of the secondary lining . Key words :tunnels ;monitoring settlement ;convergence internal force 在隧道施工过程中遇到的地质条件复杂,地下 211.2m,所经地区为粤中地块,地震基本烈度为6 水和围岩压力等作用下的荷载是不明确的,目前对 度,在设计中按7度设防。隧道区洞身岩石厚度...