2016年11月上 施工技术 第45卷第21期 CONSTRUCTION TECHNOLOGY 55 D0I:10.7672/5gjs2016210055 从支模方案分析某项目剪力墙胀模原因及防治措施 田署林 (中建海峡建设发展有限公司,福建福州350000) [摘要]胀模是现浇剪力墙结构最常见的质量问题之一.它会造成剪力墙、梁等构件尺寸增大、外形不规整,直接 影响到混凝土的外观质量,而且还会因为加固、打凿导致人力、物力的浪费.从人、机、料、法、环、测6个方面分析, 可以得出很多胀模原因.但是工程常见胀模的原因主要是因支模方案不规范引起的,笔者仅从支模方案分析胀模 的原因,并对方案进行改进以避免剪力墙胀模. [关键词]混凝土;剪力墙;胀模;防治措施 [中图分类号]TU755.2 [文献标识码]A [文章编号]1002-8498(2016)21-0055-03 Shear Wall Inflation Reason and Treatment Measures of a Project from Formwork Support Scheme Tian Shulin (CSCEC Strait Construction and Derelopment Co.Lid.Fuzhou Fujian 350000 China) Abstract:Inflation is one of the most mon problems in cast-in-situ shear wall structure.It can cause thickness increase of shear wall and beam as well as irregular shape which influences the appearance quality of concrete.Because of irregular appearance it generally need to chisel surface integrity a waste of material resources.The reasons can be found in human factors machine factors materials factors tools factors climate factors and measurement factors.But the main reason is non-standard scheme of formwork.This paper take this as our point to avoid the case by a few improving scheme. Key words:concrete;shear walls;inflation;treatment measures 1工程概况 足力学计算要求导致的胀模. 山海城邦(西山区第47号城中村改造片区一期 3)主楞双钢管接头任意搭接,甚至出现了同一 工程)位于昆明市西山区马街片区,总建筑面积为 连接区域出现100%搭接接头的现象,导致剪力墙 128万m2 是集车库、商业、住宅、办公等功能于一体 大面积胀模. 的大型高档综合社区.其中本工程有23栋剪力墙结 2.1.2防治措施 构高层及超高层住宅楼,建筑高度80~140m 剪力墙 1)次楞方木布置间距按力学计算的300mm 结构住宅楼建筑面积达70余万m2 剪力墙厚度 布置. 200~350mm.本工程模板选用15...
【关键词】体育馆;钢结构;屋盖;轮辐式张弦梁;张拉;监测 【中图分类号】TU758;TU311【文献标识码】A[文章编号]1002-8498(2012)20-0065-03 BeamStringStructureConstructionStudyofthe SoutheastUniversity Gymnasium Pan Jie,Luo Bin,Guo Zhengxing (School of Civil Engineering,Southeast University.Nanjing,Jiangsu 210096,China) Abstract;Southeast University Gymnasium uses beam string structure which consists of top chord steel beam, the last quarter cable and brace strut. The plan span is 88. 0m x 76.8m with a total of 24 widths. The cable stretching of this project is divided into three stages ( pretension→50% →75% 100% ),and each stage is divided into four batches (6 widths of each batch), then the same batch consists of five steps (0-→25%→50%→75%→100%). Finite element analysis software ANSYS is used to simulate the tensioning process, determine the parameters of each batch of cable construction tensile force, structural deformation, and so on. In addition, the cable force and structure displacement in the process of construction is monitored. The measured results show that the cable forces and deformation correspond to theoretical ones,and the structural state reaches the initial design state after the pletion of the stretching. Key words: gymnasium; steel structures; roof coverings; spoke-type beam string structure; stretching;monitoring 施工中张弦梁索力监测是非常必要的。
[关键词]直剪试验;土工合成材料;剪切特性;试验 [中图分类号】TU458[文献标识码】A[文章编号】1002-8498(2017)01-0054-04 Study onCharacteristics ofDifferent Geosynthetics and SandInterfaceinDirectShearTest Li Lihua'²,Gao Meng',Luo Shizhe',Chen Yanjun', Shi Anning',Wen Bei' (1.Institute ofCivilEngineering andArchiecture,HubeiUniversity ofTechnology,Wuhan,Habei430068,China; 2.State Key Laboratory of Geomechanics and Geotechnical Enginering,Instiuteof Rock and Soil Mechanis, Chinese Academy of Seiences,Wuhan,Hubei 430071,China) Abstract:In order to study on the interface shear characteristics between reinforcement materials and soil of three kinds of geosynthetics include the scrap tire,geocelland the geogrid,a series of large-scale direct shear test are conducted on the samples. The reinforcement effect of three kinds of reinforcement materials are pared,and the interface between reinforcement materials and soil direct shear strength characteristics and shear stress-displacement characteristics of geosynthetics under different vertical stresses are analyzed paratively. The result shows that, the relationship curve of shear stress- displacement of the interface between reinforcement materials and soil is nonlinear,the reinforcement effect of several reinforced materials are great and the most significant effect of material is serap tire. The cohesive force of the interface between reinforcement materials and soil increased greatly, paratively the friction angle changes less,indicated that the shear strength improved mainly by inereasing cohesion of the interface ...
施工技术 2014年6月上 64 CONSTRUCTION TECHNOLOGY 第43卷第11期 D01:10.7672/sgjs2014110064 不同浇筑工艺对沉管裂缝控制的影响分析 王彦林,徐兆全2,熊建波2 (1.港珠澳大桥管理局,广东珠海519015; 2.中交四航工程研究院有限公司水工构造物耐久性技术交通行业重点实验室,广东广州510230) [摘要]通过某沉管试验段温度应力计算和混凝土龄期差下收缩约束应力分析,对目前沉管结构通常采用的分层 浇筑工艺和全断面浇筑工艺对裂缝控制的影响进行了研究.研究表明,分层浇筑工艺下沉管会产生更大的温度应 力和收缩约束应力,开裂风险较大,采用时需重点注意混凝土温升、浇筑时间间隔等指标. [关键词]桥梁工程;混凝土;沉管;浇筑;裂缝;施工技术 [中图分类号]U445.57 [文献标识码]A [文章编号]1002-8498(2014)11-0064-02 Analysis of the Effects of Different Pouring Technologies on Crack Control of Immersed Tube Wang Yanlin' Xu Zhaoquan2 Xiong Jianbo㎡ (1.Hong Kong-Zhuhai-Macao Bridge Authority Zhuhai Guangdong 519015 China; 2.Key Laboratory of Harbor and Marine Structure Durability Technology of the Ministry of Communications CCCC Fourth Harbor Engineering Institute Co.Lsd.Guangzhou Guangdong 510230 China) Abstract:By the calculation of temperature stress and the analysis of shrinkage stress in concrete different age of some immersed tube test section the effects of two current popular pouring technologies(including layered pouring and full-face pouring)on crack control of immersed tube are studied.The results show that the immersed tube has larger temperature and shrinkage stress under layered pouring technology and its cracking risk is bigger.During immersed tube construction temperature rise casting time interval of concrete and so on should be emphasized under layered pouring technology. Key words:bridges;concrete;immersed tubes;pouring;cracks;construction 0引言 前由于混凝土早期应力形式较为复杂无法准确获 沉管作为目前一种...
[关键词]保温复合板;温度;热流;传热系数;试验 【中图分类号】TU227【文献标识码】A[文章编号]1002-8498(2016)06-0087-04 ExperimentalStudy onHeat-transfer CharacteristicsofLightweight InsulationBoardwithDifferentLaminatedComposites Wang Qingxuan', Shi Yunxing',Qu Tiejun²,Liu Wei',Zhang Yan’gang’ (1.China State Consruction Engineering Co.,Technical Center,Beijing101300,China; 2.Architecture and CivilEngineeringCollegeofNorthChinaUniverstyofTechnology,Beijing100041,China) Abstract:In this experimental study,lightweight insulation boards made of normal concrete(NC)/ ceramsite cellular concrete (CCC) laminated posites were divided into the internal,external and sandwiched insulation.Withamethod of heat flowmeter,temperature changes and heat flux through the boards were synchronously measured,then calculation of heat transfer coeffcients of the boards and contrastive analysis were conducted.The results showed that the heat transfer coefficient of the internal insulation was approximate to that of the external insulation,however,heat transfer coeficient of the sandwiched insulation was a litte higher.In addition, the heat transfer coefficient of thelaminated board of 60mm NC together with 100mm CCC layer was about 1.0W/(m²K), and it could basically satisfy the energy efficiency design standard of public buildings in the hot summer and cold winter zone. Key words:insulation laminated board; temperature;heat flux;heat transfer coefficients; tests 0引言1复合板构造 轻质保温复合板是中国建筑技术中心自主研轻质保温复合板是由结构层和保温层构成,结 发的产品,获得国家发明专利。
施工技术 2011年10月上 86 CONSTRUCTION TECHNOLOGY 第40卷第350期 不同开挖方法对交叠隧道影响的模拟研究 陈炳志,路林海2,王清标1 (1.山东科技大学泰安校区,山东泰安271019;2.山东省交通规划设计院,山东济南250031) [摘要]以青岛某交叠隧道工程为例,模拟了3种不同施工方法开挖新线隧道的动态施工过程,分析了每种开挖方 法对交叠区围岩及既有隧道衬砌的影响程度、交叠区围岩塑性破坏区形态特征;确定了不同施工方法每开挖步所 产生的拱顶沉降量,为分步开挖的变形控制标准提供相关的理论依据,提出了采用台阶法-CRD法-台阶法的施工 方式开挖新线隧道的建议. [关键词]隧道工程;交叠隧道;开挖方式:台阶法;双侧壁导洞法;CRD法:模拟计算 [中图分类号]U455.4 [文献标识码]A [文章编号]1002-8498(2011)19-0086-04 Simulation Study of Different Excavation Methods Affecting the Overlap Tunnels Chen Bingzhil Lu Linhai2 Wang Qingbiao' (1.Taian Campus of Shandong University of Science and Technology Taian Shandong 271019 China; 2.Shandong Province Communications Planning and Design Institute Ji'nan Shandong 250031 China) Abstract:Based on some overlaps tunnel project in Qingdao authors simulate dynamic construction process of new tunnel excavation with three different methods analyze effect on the existing tunnel lining and characteristics of plastic failure area.Further more they determine the vault settlement in each excavation step with different methods which provides theory basis for deformation control and propose bench method to CRD method to bench method to excavate the new tunnel. Key words:tunnels;overlap tunnel;excavation;bench method;both side heading method;CRD method; simulation 研究近距离交叠工程中地层和围岩的变形及 道截面跨度8.9m、净高5.945m 截面形状如图1所 应力应变规律,保证隧道施工和运营期间的安全是 示.上部隧道的埋深为25m 2条隧道的最小净距 十分必要和重要的.多数研究是针对某一开挖方 为4m.模拟采用FLAC3D有限差分程序,交叠隧道 式下地层及隧道应力应变规律、围岩塑性区发展规 的模型网格划分如图2所示. 律、变形支护控制方法等方面,而对不同开挖方法 对近距离交叠隧道影...
2015年2月上 施工技术 第44卷第3期 CONSTRUCTION TECHNOLOGY 117 D0I:10.7672/js2015030117 XYPEX水泥基渗透结晶型防渗材料 在甘肃庆阳石化工程中的应用 张成武1,王晛2,于明3,李涛4 (1.中国石油庆阳石化公司,甘肃庆阳745115;2.中国石油工程建设公司华东设计分公司,山东青岛266071; 3.中国石油呼和浩特石化公司,内蒙古呼和浩特010070;4.北京城荣防水材料有限公司,北京100011) [摘要]石化行业容易造成环境污染,生产过程产生的废液可通过土壤渗透到地下,对土壤和地下水造成污染,石 化企业防止地下水污染成为环保关注点.XYPEX“赛柏斯”水泥基渗透结晶型防渗材料具有渗透率低、施工简单、 成本低廉的特点,可代替HDPE膜成为新型的防渗材料.该材料使用后解决了石化装置大型设备基础不均匀沉降 对HDPE膜的破坏. [关键词]混凝土;掺和剂;黄土地基;地下水污染;应用 [中图分类号]TU761.11 [文献标识码]A [文章编号]1002-8498(2015)03-0117-03 Application of XYPEX Cement-based Capillary Crystalline Waterproofing Materials in Qingyang Petrochemical Engineering Zhang Chengwu' Wang Xian2 Yu Ming' Li Tao (1.China Petroleum Qingyang Petrochemical Company Qingyang Gansu 745115 China;2.East China Design Branch of China Petroleum Engineering Construction Corporation Qingdao Shandong 266071 China; 3.China Petroleum Hohhot Petrochemical Company Hohhot Inner Mongolia 010070 China: 4.Beijing Chengrong Waterproofing Material Co.Ld.Beijing 100011 China) Abstract:Petrochemical industry is easy to cause environmental pollution.The waste production process produces can seep into the ground through the soil which cause pollution of soil and groundwater. Therefor petrochemical enterprises preventing groundwater pollution bees the key for environmental protection.The XYPEX cement-based capillary erystalline waterproofing materials have the characteristics of low permeability simple construction low cost and can replace the HDPE membrane as new type of anti...
2010年3月 施工技术 第39卷第3期 CONSTRUCTION TECHNOLOGY 85 XPS挤塑板薄抹灰外墙外保温系统 工程质量控制措施 赵书杰1,张新庆2 (1.苏州科技学院建筑系,江苏苏州215011;2.苏州市吴中区建设工程质量监督站,江苏苏州215128) [摘要]对XPS挤塑板薄抹灰外墙外保温系统在工程应用中出现的问题进行了分析,从系统材料、设计、施工技术、 修补技术、检测验收等方面进行了针对性的工程质量控制,提出了改进方案和技术措施,以此促进外墙外保温技术 的健康发展. [关键词]XPS挤塑板;外保温;质量控制 [中图分类号]TU111.4;TU761.12 [文献标识码]A [文章编号]1002-8498(2010)03-0085-03 Quality Control Measures on XPS Extruded Plastic Board Thin Plastering External Thermal Insulation System Engineering on Walls Zhao ShuJie' Zhang Xinqing? (1.Architecture Department Inatitute of Science and Technology of Suzhou Suzhou Jiangsu 215011 China; 2.Suzhou Wuzhong District Construction Project Quality Supercision Station Suzhou Jiangsu 215128 China) Abstract:In this article the authors analyze some problems occurred in XPS extruded plastic board thin plastering external thermal insulation system on walls and put forward engineering quality control measures from some aspects of materials design construction repair technology and acceptance and test.The authors also put forward developed scheme and technical measures to improve external thermal insulation technology on walls. Key words:XPS extruded plastic board;exterior insulation;quality control 目前苏州地区主要采用胶粉秦苯颗粒外墙外保温材料,采用专用外保温黏结剂粘贴挤塑板,并用铺固件 系统、EPS聚苯乙烯板外墙外保温系统、XPS挤塑板薄辅助固定在墙体外表面,以专用抹面胶浆作为保护层, 抹灰外墙外保温系统、聚氨酯外墙外保温系统、装饰板 耐碱玻纤网格布为增强抗裂层,弹性涂料或面砖作为 保温外墙外保温系统、砂加气混凝土砌块墙体自保温 饰面层的挤塑板薄抹灰外墙外保温系统的构造体系. 系统等.在对苏州市区20个工程项目的调研中,XPS 挤塑聚苯乙烯泡沫塑料板(XPS)系统材料较好地 挤塑板薄抹灰外墙外保温系统市场占有率达8%以解决了保温、抗裂、抗风和耐候性等问题.但在工程实 上,但近几年的...