施工技术 2011年1月 88 CONSTRUCTION TECHNOLOGY 第40卷第2期 复合型聚羧酸外加剂在冬期施工应用中的试验研究 杨建国,王明明,李忠雨,娄维萍,马学伟 (天津市建工工程慈承包有限公司,天津300384) [摇]结含津广场一期E标段工程,在聚酸外加利冬期工中,恰当取试骑方法,考患不同混凝土配含比 对混凝土工作性的影响以不网养护条停对混凝土抗压度的影响.经过数据分析,优逸了聚粮酸的最佳接蛋, 并应用于工程中,取得了良好的经济数果.佳果明:复含型聚粮验外加剂不仅能提高混斑土的力学性能,而且能 提供简便易行的施王工艺. [关键词]混凝土工程:外加利:聚酸 [中图分类TU528.042 [立献识码]A [文章编号]10028498(2011)02-0088-03 Test Research on Compound Polycarboxylic Acid Admixture During Winter Construction Yang Jianguo Wang Mingming Li Zhongyu Lou Weiping Ma Xuewei (Tianjin Construction Engineering Main Construction Co.Lad.Tianjin 300384 China) Abstract:Based on the E bid section in one stage of Jinwan Square reasonable test method is selected during the winter construction of pound polycarboxylic acid admixture.Besides effects of different concrete mix proportions are studied on the concrete workability and effects of different maintenance conditions are researched on concrete pressive strength.The optimum mixing amount is chosen by analyzing data to be applied in the engineering.Good economic benefit is obtained.The results show that pound polycarboxylic acid admixture can not only enhance mechanical performanee of conerete but also offer the convenient construetion technology. Key words:concrete engineering:admixture:polycarboxylic acid 复含型聚羧酸外加剂是继木钙为代表的普通减还相对较少,应用时,很多是依据产品说明书或以往 水剂和以茶系为代表的高放减水剂之后发展起来的 经验进行操作,从而造成施工的言目性.特别是在 第三代高性能减水剂. 冬期施工期向,对聚粮酸外加对混凝土的单期强 复含型聚鞍酸外加剂不仅能提高混凝土的力学度的影响,仍然了解不足. 性能,而国能提供简便易行的施工工艺.它以极高 结含天津津湾广场一期工程E标毅工程,对聚 的减水率和极小的胡落度损...
[关键词]深基坑;地质雷达;检测;含水地层;注浆 [中图分类号]TU753[文献标识码]A[文章编号】1002-8498(2016)01-0059-04 ApplicationofGroundPenetratingRadarinDetectionofSoilMoisture ContentandGroutingReinforcementQuality XiaoWeifeng,ZhangYan,LiZhangpeng,DengJian,HuZhongming (China Construction Third Engineering Bureau Group Co.,Lud.,Beijing100097,China) Abstract:To accurately test the moisture content of soil layers and grouting reinforcement can prevent the water seepage effectively.Drilling holes on the ground and observation well are usually used to detect the soil moisture content and grouting quality. Based on the conception of non-destructive testing(NDT) and real engineering cases, this paper introduces the ground penetrating radar method. The technique mainly analyzes the amplitude of radar map, features including wave velocity and wave shape, thus can scientifically estimate the moisture content of soil layers as well as the grouting reinforcement quality. Key words: deep foundation excavation;ground penetrating radar; detection; water-saturated strata;grouting
大型深基坑施工时间长,支护结构侧壁裸露在探、原位测试及室内土工试验成果,按地层沉积年 恶劣环境中,极易出现渗水现象,严重的将会导致代、成因类型,将最大勘探深度132.00m范围内的 滑坡等工程事故。
2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5js2015040049 地下室屋顶花园柱破坏原因分析及加固方案 任生元,王建莹1,顾荣军2 (1.江苏鼎达建筑新技术有限公司,江苏常州213015; 2.常州市建筑科学研究院股份有限公司,江苏常州213015) [摘要]针对目前地下室屋顶花园建设中混凝土柱容易发生破坏的情况,分析了其破坏原因与破坏形态,介绍了混 凝土柱破坏后应遵循的加固处理程序,并对可行的加固处理方案进行了对比分析. [关键词]加固:混凝土;柱;破坏形态 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2015)04-0049-04 Causes Analysis and Reinforcement Schemes for Column Failure in Basement Roof Garden Ren Shengyuan' Wang Jianying' Gu Rongjun2 (1.Jiangsu Dingda New Construction Technology Co.Ltd.Changzhou Jiangsu 213015 China; 2.Changzhou Architectural Scientific Research Institute Co.Ltd.Changzhou Jiangsu 213015 China) Abstract:According to the current situation for the concrete columns of roof garden construction in the basement prone to damage this paper analyzed the failure causes and failure modes and introduced the reinforcement procedure after destruction of concrete column.The possible reinforcement schemes were pared and analyzed. Key words:reinforcement;concrete;columns;failure modes 随着城镇化进程的加快,物质生活水平的提高, 地下室屋顶花园一般覆土较厚且上面恒荷载 人们对现代城市生活环境品质的要求越来越高,如何较大,当地下室设计为地下停车场时,框架柱网间 以有限的土地资源满足城市绿地,进一步改善居住环 距一般较大,地下室顶层框架梁柱节点区域钢筋非 境,住宅小区地下室屋顶花园的建设正越来越得到重 常密集,上部有两侧贯穿节点的4层梁纵向钢筋和 视和发展.打造触物可及的绿色生态环境,这正好与 柱纵向锚固钢筋;下部梁纵向钢筋在节点的连接和 目前政府积极倡导建设生态文明城市相适应,对促进 锚固一般在设计上未做具体要求,现场施工传统做 新型城镇化的可持续发展具有重要意义.在建设住 法是:由于地下室框架梁下部纵向钢筋根数较多, 宅小区屋顶花园过程中,地下室钢筋混凝土柱及相邻 采用定尺长度9m的钢筋可能正好从两侧直接锚固 结构发生破坏时有发生,仅最近2年笔者就处理了十 在梁柱节点内,钢筋无需连接,也不产生接头费用, 几起地下室顶板建造屋顶花园导致地下室混凝土结 造成节点下部梁纵向钢筋实际根数是原设计的2 构破坏的工程案例.混凝土结构特...
施工技术 2015年8月下 114 CONSTRUCTION TECHNOLOGY 第44卷第16期 D0I:10.7672/sgj82015160114 地下室局部整体抗浮水头计算方法研究 杨淑娟,张同波2,刘德海 (1.青岛理工大学土木工程学院,山东青岛266033;2.青建集团股份公司,山东青岛266000) [摘要]对于带有大底盘地下室的高层、超高层结构,由于主楼部分结构自重较大,面地下室部分结构自重相对较 小,如果地下水位超过一定高度后,可能会导致与主楼的地下室部位出现“局部整体抗浮失效”.在施工过程中,当 地下室部位的覆土回填完成之前,结构的压重没有到位时,如果出现降水能力不足或遇到较强的降雨时,也会发生 施工过程中的“局部整体抗浮失效”事故.介绍了“局部整体抗浮失效”发生的部位及受力特征,并结合工程实例 提出了“局部整体抗浮设计水头”的计算方法,最后通过数值模拟验证了所建议计算方法的可靠性. [关键词]地下工程;地下室;抗浮水头;计算方法 [中图分类号]TU753.66 [文献标识码]A[文章编号]1002-8498(2015)16-0114-04 Research on Calculation Method of Local Anti-floating Water Head of Basements Yang Shujuan' Zhang Tongbo2 Liu Dehai' (1.School of Ciwil Engineering Qingdao Technological University Qingdao Shandong 266033 China; 2.Qingjian Building Group Co.Lid.Qingdao Shandong 266000 China) Abstract:With respect to high-rise and super-high-rise buildings with large chassis basements because of the high dead load of main building and the relatively low dead load of basement structure local anti- floating failure may occur when the groundwater rises up to a certain level of limitation.During the construction this phenomenon of local anti-floating failure may also happen when rainfall is not sufficient or it is too much before covering soil is backfilled and weight is not added.In this paper the location and mechanical property of the local anti-floating failure has been introduced.A calculation method of local anti-floating water head has been proposed and demonstrated a practical case.Finally the reliability of t...
施工技术 2016年5月下 30 CONSTRUCTION TECHNOLOGY 第45卷第10期 D0I:10.7672/8js2016100030 叠合柱新型梁柱节点力学性能与施工方法研究 羿生钻 (中铁城建集团北京工程有限公司,北京100024) [摘要]对钢管混凝土叠合柱梁柱节点进行了设计,将钢筋贯穿核心钢管,对其进行了单调加载和循环加载的有限 元模拟.并结合唐山某工程,对贯穿型节点设计方法进行了改进,尝试了弯起型节点.对两种节点的刚度、承载力 等性能进行了比较.研究结果表明:两种节点的整体滞回性能和承载力、刚度很相近,均具有良好的承载力、延性 及耗能能力.此外,还对叠合柱施工工艺进行了研究. [关键词]钢管混凝土叠合柱;力学性能;有限元分析(FEM);施工工艺 [中图分类号]TU31 [文献标识码]A [文章编号]1002-8498(2016)10-0030-03 Research on Mechanical Properties and Construction Method of New Laminated Steel Tube Columns Beam-column Joint Yi Shengzuan Beijing Engineering Company Limited of China Railway Urban Construction Group Beijing 100024 China) Abstract:A new laminated steel tube columns beam-column joint is designed steel bar will be throughout the core steel tube and monotonic loading and cyclic loading is simulated through finite element analysis.Combined with a project in Tangshan the throughout type node design method is improved and tried a bent-up type node.Two nods’bearing capacity rigidity and other performances are pared.The research results show that the two type node'hysteretic behavior bearing capacity and rigidity are nearly identical.High bearing capacity ductility and energy dissipation capacity are observed.In addition the construction method is studied. Key words:laminated steel tube columns;mechanical properties;finite element method FEM); construction method 钢管混凝土叠合柱是一种新型钢筋混凝土结 构抗震构件,它是由钢管混凝土外包钢筋混凝土而 成的柱,也可看成是在钢筋混凝土柱内置钢管混凝 土而成,如图1所示.钢管混凝土叠合柱-现浇钢筋 混凝土梁连接节点的可靠性对结构安全至关重要. 针对工程中的钢管混凝土叠合柱钢筋混凝...
2010年11月 施工技术 第39卷第11期 CONSTRUCTION TECHNOLOGY 107 叠合式装饰斗拱制作安装关键技术 阮连法,王媛2,林炎飞3 (1.浙江大学建筑工程学院,浙江杭州310058;2.浙江大学管理学院,浙江杭州310058; 3.广厦建设集团,浙江杭州310013) [摘要]仿古建筑中斗拱构造复杂,传统的制作安装工艺给现代施工进度和工程质量造成很大影响.普陀山普门 万佛宝塔项目的叠合式装饰斗拱制作安装工程应用AutoCAD计算机辅助放样下料、局部GPS定位测量等关键技 术,施工效率高,施工质量好.着重介绍了上述关键技术的特点、原理及施工操作要点. [关键词]叠合式斗拱;AutoCAD;放样下料;局部GPS;安装定位 [中图分类号]TU72 [文献标识码]A [文章编号]1002-8498(2010)11-0107-03 Key Production and Installation Technologies of the Combined Decorative Bucket Arch Ruan Lianfa' Wang Yuan' Lin Yanfei (1.School of Ciuil Engineering and Architecture Zhejiang University Hangzhou Zhejiang 310058 China; 2.School of Management Zhejiang Unizersity Hangzhou Zhejiang 310058 China; 3.Guangsha Construction Group Co.Lid.Hangzhou Zhejiang 310013 China) Abstract:The bucket arch in the pseudo-classic buildings has a plicated structure which brings difficulty to the schedule and quality of modern construction.The Buddha Pagoda project in Putuo Mountain applies several key technologies to the production and installation of the bined decorative bucket arch including using AutoCAD to help lofting and cutting using Indoor GPS to help locating and measuring.Those technologies have a high construction efficiency and quality.The authors introduce the characteristic principle and the operation process of those technologies. Key words:bined bucket arch;AutoCAD;lofting and cutting;Indoor GPS;locating and installation 叠合式斗拱是中国传统木构架体系建筑中独有的 工程施工存在以下困难:①叠合式斗拱形式多样, 构件,用于柱顶、额枋和屋檐或构架间,是古建筑的重而且一种斗拱中构配件复杂、种...
[关键词]地下工程;基坑;桩;冲击钻;施工技术 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2014)13-0030-04 ApplicationofReverseCirculationImpactDrillinWeatheredStrata Chen Xinbing (China Railway Construction Group Co.,Lud.,Beijing100131,China) Abstract;Based on retaining piles construction in a project, this paper mainly introduced construction technology of reverse circulation impact drill in strong weathered strata.According to the analysis on rock geologicalconditions,the effect of geological conditions on construction was judged,construction methods were determined based on influence factors.Meanwhile,underground water concrete pouring measures were expounded, the integrity of pile was judged by transient time domain analysis method. Key words:underground;foundation excavation;piles; impact drill; construction 1工程概况 最终确定基坑北侧在进人强风化岩层前采用 某交通枢纽J地块拟建场地±0.000相当于绝 人工成孔方法,在进人强风化岩层后采用反循环冲 对标高75.200m,近3~5年最高地下水位埋深> 击钻继续施工,未遇风化岩桩体仍按原设计方案采 35m,设计基坑围护桩采用人工挖孔灌注桩,设计桩 用人工成孔施工。
施工技术 2016年12月上 22 CONSTRUCTION TECHNOLOGY 第45卷第23期 D0I:10.7672/sgjs2016230022 分布增阻式自行进掘进机在煤矿采区巷道中 应用的可行性研究* 秦飞,卢清国 (北京工业大学建筑工程学院,北京100124) [摘要]介绍了一种新型的由多节增阻结构组成的自行进式隧道掘进机.分析了此类型掘进机在土中和岩石中依 靠分布式增阻结构提供的推力实现自行进的可行性.该新型掘进机与现有可用于煤矿巷道的机械相比较,除具有 全断面掘进机共有的施工速度快的优点外,还具有在煤矿采区的煤岩层巷道快速施工的特征;与岩石掘进机 (TBM)撑靴式增阻相比,其外壁上布置更多增阻块的分布式增阻,能在直径相同、推力相等时的额定接地压力仅为 TBM的1/3左右,因此更加适用于围岩强度偏低特性的煤矿巷道. [关键词]煤矿;巷道;隧道掘进机;分布式增阻:自行进 [中图分类号]TD421.5 [文献标识码]A [文章编号]1002-8498(2016)23-0022-07 Feasibility Study on Application of Self-advancing Machine with Distributed-resistance in Coal Mine Roadway Qin Fei Lu Qingguo College of Architecture and Civil Engineering Beijing University of Technology Beijing 100124 China) Abstract:This paper introduces a new kind of self-advancing machine posed by the multiple resistance section.The self-advancing feasibility of the type machine which depends on the thrust by distributed-resistance section in soil and rock is analyzed.Compared with the existing machinery used in coal mine roadway the new type machine has the same advantages of high-speed construction in addition it possesses unique characteristics of rapid construction in coal mining roadway of coalmine winning district.In contrast with gripper shoe structural part of TBM self-advancing machine which adopts more resistance section in the outer wall incurs the rated contact pressure which is only about 1/3 of TBM under the certain condition of the same diameter and equal thrust thus the self-advancing machine is more appl...
[关键词]冻融循环;灰土垫层;透水性;抗剪强度;单轴抗压强度 [中图分类号】TU411[文献标识码]A[文章编号】1002-8498(2011)13-0057-05 TestStudy on thePermeabilityandStrengthVariationofLime SoilBeddingUnderFreezing and Thawing Cycles
(1.Sehool of Civil Enginering,Changan Unizersty,Xian,Shaanxi710061,China; 2.North-west Subsidiary Company,China State Consruction Enginering Co.,Ld.,Xian,Shaanxi710065,China) Abstract:Based onthe design parameters of lime soilbeddingunder permeable concrete inimperial road engineering in Xi'an Daminggong Palace National Heritage Park, the uniaxial pressive test, permeability test and fast direct shearing test of lime soil on age 35d are acplished under ten freezing and thawing cycles.The results show that the fast direct shearing strength decrease exponentially with the numberof freezing and thawing cycles without consideration ofmoisture content,and thefitting curve and equation is according with the measured values well. However, the rule between of strength parameter (such as cohesive force and internal friction angle) and freezing and thawing cycles is not obvious with the inaccuracy of two fitting process.Furthermore, the coefficient of permeability decreases exponentially with the number of freezing and thawing cycles, and the fitting curve and equation is according with the measured values well, which prove that the uniaxial pressive strength on age 35d of lime soil treated with lime of dry mass ratio 15% is stable under freezing and thawing cycles with the water content of 24% to 26%. Key words:freezing and thawing cycle; lime soil bedding; permeability; shearing strength; uni...
[关键词]检测;木建筑;安全性;抗风性能 [中图分类号】TU392.6,TU312 [文献标识码]A [文章编号]1002-8498(2014)04-0031-04 DetectionandEvaluationofWindResistantSecurity ofAntiqueWoodStructure Lu Yunxiang,Wang Linfeng,Tian Yong,Ran Qun (Guizhou Consruction Scienijfic Research Tesing Center,Guiyang,Guizhou550006,China) Abstract:This paper mainly researches on the safety detection and assessment method of antique wooden structure under wind loads. In view of the influence factor of structural reliability, this article describes the basic content of the antique wooden structure on-site detection and raw material test,then discusses example, the wind resistance safety of a tower is calculated and analyzed by means of on-site detection, raw material test and finite element technology.The results show that the effective bination of on-site detection technology and FEA method can offer theoretical basis for safety assessment,maintenance and repairment of the antique structure. Key words:detection;wooden buildings;safety;wind resistance 0引言 筑工作者的职责所在。
[关键词]钢结构;屋盖;斜钢柱;预埋件;抗剪;施工技术 [中图分类号]TU758.11[文献标识码】A[文章编号]1002-8498(2012)20-0075-03 Construction of theLarge-spanV-shapedInclinedSteel ColumnShear EmbeddedPartsofDongguanBasketballCenter Yang Wenjun,Guo Qingsong,Wu Hongzhang,Zhang Lei, Wu Junping,Xie Rongxiang (Guangzhou Branch,China Construction Eighth Engineering Division Co.,Ltd.,Guangzhou,Guangdong 510665,China) Abstract;The steel roof coverings in Dongguan Basketball Center apply spoke wheel structures, which are supported with the outer ring V-shaped columns and inclined column.Because the precise installation and location is difficult of the V-shaped inclined steel column shear embedded parts, and it has high requirements to shear keys location, a new kind of V-shaped inclined steel column shear embedded parts is put forward.Through positioning bracket, positioning loop board control, two-time adjustment of embedded parts,two-time grouting of concrete,the construction quality is guaranteed effectively. Key words: steel structures; roof coverings; inclined steel, column; embedded parts; shearing; construction 1工程概况31.5m;钢结构主要材料为圆钢管和箱形梁,材质为 东莞篮球中心工程占地400亩(约26.67万Q345B,Q390C,Q390C-Z15及Q390B,钢结构总质量 m²),总建筑面积约5.68万m²,设观众席1.6万多约4266t。