[关键词】地下工程;车库;变形缝;堵漏;压密注浆;膨胀密实法 [中图分类号】TU761.1*1 [文献标识码】A [文章编号]1002-8498(2016)03-0063-05 ComprehensiveLeakageTreatmentsofDeformation Joints in an Underground Garage Han Bingkang, Li Ming (Department of Structural Engineering,TongjiUniversity,Shanghai 200092,China) Abstract:The floating basement and the leakage of deformation joints in underground garage appear occasionally. The heights differing in the two sides of movement joint are caused by the basement' s floating and the channel slippage.It is dificult to treat the leakage of the deformation joint. Combined with the leakage treatment of a basement’s deformation joint, the performances and application of some new techniques are selected,the‘from top to down’anti-floating anchor rods of steel grouting piles is introduced to prevent the basement floor from floating. Key words:underground; garage; deformation joints; leak stopping; paction grouting; inflation- densified method 1工程概况 板和沥青麻丝。
施工技术 2016年8月下 48 CONSTRUCTION TECHNOLOGY 第45卷第16期 D01:10.7672/gjs2016160048 某大型地下室结构上浮拱起工程事故分析与处理 贾益纲,费逸2,吴光字,王惠宾,欧阳斌3,袁志军 (1.南大学设升研究院,江西南330029;2.同济大学土本工程学院,上海200092; 3.江五方建就设计有限公司,江西精州341000) [描要]根据上浮拱起数对菜地下室所遇最高水位进行了数值推算,并结含场地地质条件、施工情况和结构裂缝 性状等进行了地下室结构拱起和裂健原因分析;研究衬论了两种抗浮处理方略,并通过空间结构弹塑性简化分析 确定了整体抗浮和结构加处理方. [关键词]地下室;上浮拱起:翠继;弹塑性分析;抗浮;加 [中图分类马]TU746.3 [交献标识弱]A[支章编号]1002-8498(2016)16-0048-05 Analysis and Processing on Up-floating Arch Accident of a Basement Structure Jia Yigang' Fei Yi Wu Guangyu' Wang Huibin' Ouyang Bin Yuan Zhijun (1.Insititute of Design and Research Nanchang Unirersity Nanchang Jiangxi 330029 China; 2.College of Civil Engineering Tongji University Shanghai 200092 China: 3.WuFang Architectural Design(Jiangxi)Co. Lud.Ganzhou Jiangxi 341000 China) Abstract:According to the floating arch data the highest water level of basement is studied by numerical calculation in this text and bining with geological conditions construction and characters of cracks the arching of basement structure and crack reason is analyzed.The two kinds of anti-floating treatment strategy are discussed and through the simplified analysis of spatial elastic-plastic structure the program of structure reinforeement and the overall anti-floating are determined. Key words:basement floating arch;cracks;elastic-plastic analysis;anti-floating;reinforcement 地下水作用及地下室抗浮已是建筑工程界常 本文针对某大型地下室结构上浮事故,在空间 遇的技术问题.加果地质勘察建议的地下室抗浮结构弹塑性有限元分析的基础上,进行原因分析、 水位取值不含理、设计不周、施工不当或使用不善,受损构件析与加固处理,探讨地下室抗浮事故分 都可能发生地下室上...
2013年2月上 施工技术 第42卷第3期 CONSTRUCTION TECHNOLOGY 37 D0I:10.7672/sgjs2013030037 某大型公共场馆抽柱改造工程设计与施工* 李果,袁珊珊,杜健民 (中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116) [摘要]为满足某大型公共场馆的使用要求,需要对位于中轴线上的3根钢筋混凝土柱进行拆除,此举将使大梁的 最大跨度从12m增大到24m.在考虑结构整体性能以及抗展性能的基础上,综合采取了增设支点柱、增大断面加 固梁和粘贴碳纤维布的改造方案,同时采取了先改造加固后拆除柱的施工方案.施工安全监测结果表明:柱拆除 后,梁、柱的应力进行了重分配,结构的整体挠度变形很小,结构的改造和加固是安全的. [关键词]改造工程;抽柱;加固;设计;施工 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2013)03-0037-04 Design and Construction of Column-removed Retrofit Project for Some Large Public Building Li Guo Yuan Shanshan Du Jianmin Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering of China University of Mining Technology Xushou Jiangsu 221116 China Abstract:To satisfy the function requirements of a large public building three reinforced concrete columns on the central axis need to be removed which caused the largest span of transverse beams to increase from 12m to 24m.Considering the structural integrity and seismic resistance a retrofitting scheme was adopted which included providing additional supporting columns enlarging beams section and strengthening with carbon fiber sheets.During the construction all the retrofitting and strengthening work were finished before the columns were removed.The construction safety monitoring shows that stress redistribution occurred to the columns and beams after columns removal.The overall deflection of structure was subjected to little change which indicates that the retrofitted structure is safe. Key...
2016年8月上 施工技术 第45卷第15期 CONSTRUCTION TECHNOLOGY 17 D0I:10.7672/8js2016150017 某大型主题乐园喷气背包飞行器游艺设备安装技术 易云枝 (上海宝冶集团有限公司,上海200941) [摘要]针对某大型主题乐因明日世界国31单体工程台地面积小、工程量大、吊装梅件种类繁多、施工工期紧 殊等工程难点,详细介绍了流项目的菜工艺及操作要点.作为自控旋转飞机类的大型游艺设鲁,可为其他大型 游乐设施安装提供参考. [并键词]装工程:游艺设;喷背包飞行器;施工技术 [中图分类号]TU74[交献标识码]A[文章编号]1002-8498(2016)15-0017-05 Installation Technology of Jet Packs Recreational Facility in a Large Theme Park Yi Yunzhi Shanghai Baoye Group Co.Ld.Shanghai 200941 China) Abstract:A series of installation process and operating points of a recreational facility of jet packs in Tomorrowland park of a large theme park are introduced with the problems of construction field small large volume hoisting members plicated and construction time limited.As a large recreational facility automatic control rotary aircraft it can provide reference for other large recreation facilities installation. Key words:installation;recreational facility;jet packs;construction 1工程概况 上海菜大型主题乐园明日世界国区301单体项 目喷气背包飞行器属于自控旋转飞机类的大型露 天游艺设.该设径16m 高约9m;由基础立 柱支撑转动中心,转动中心上安装有8组座舱旋转 系统,主臂末端容装有吊舱臂,每个主臂上装有运 动油缸,油红可使吊舱臂上下转动,游客坐在座椅 上随设备预设程序在旋转中加速和减速(见图1). 2工程难点 该工程地面积小,工程量大,吊装构件种类 繁多,施工工期紧张,施工工序复杂,必须合理安排 平面布置、选用吊装设备,才能使施工经济、合理、 有序地进行.根据各设备的质量,结合喷气背包飞 行器吊装平面图中的作业半经(26m) 确定用下 列起重设备:200tQY200K型汽季式起重机1台,主 图1喷气背包真行器游艺设备示意 要用于柱、旋转底座组含件等的容装;70tQY70K型 Fig.1 Jet packs entertainment equipment 汽车式起重机1台,主要用于固定中心容装;25t QY25K型汽季式起重机1台,主要用于驱动装置安 求.工程场区总体布盟、施工区域划分如图2所示. 3喷气背包飞行器设备安装 装.经校验,各起重设叠满足吊装半径及工况要 安装流程为:化学栓安装一→主轴承吊装→中 [作老4]易云桂,助理工程师,E-mail:9879644...
2014年11月上 施工技术 第43卷第21期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5js2014210049 某大型LNG储罐预应力施工模拟分析* 李振宝1,林树潮,王冬雁2,谢利红3,吴树勤3,韦永斌2,廖娟2 (1.北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124;2.中国建筑股份有限公司技术中心, 北京101300;3.中建电力建设有限公司,广东深圳518034) [摘要]储罐外罐是确保LG储罐安全的关键设施,预应力筋施工过程是建立结构受力体系的重要环节,研究其建 立过程对LNG储罐具有重要意义.以某大型LNG储罐为背景,选用大型通用有限元软件ANSYS建立有限元实体 模型,分析了LNG储罐在预应力筋施工过程中罐体的变形、应力状态以及预应力筋应力状态,验证了LNG储罐罐 体在预应力施工过程中受力性能良好并在控制范围内. [关键词]LNG储罐;预应力:施工技术;有限元分析 [中图分类号]TU359 [文献标识码]A [文章编号]1002-8498(2014)21-0049-05 Construction Analysis on Prestressing of Some Large LNG Storage Tank Li Zhenbao Lin Shuchao Wang Dongyan2 Xie Lihong Wu Shuqin Wei Yongbin2 Liao Juan㎡ (1.Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit Beijing University of Technology Beijing 100124 China;2.China State Construction Engineering Co.Ltd.Technical Center Beijing 101300 China; 3.China Construction Electric Power Construction Co.Ltd.Shenzhen Guangdong 518034 China) Abstract:The outer tank is the key facility to ensure the safety in the LNG storage tank prestressed tendon construction process is an important part for establishing structure system so it is of great significance to study the establishing process.Based on some LNG storage tank this paper chooses a large general finite element software ANSYS and establishes the finite element solid model analyzes the concrete stress state storage tank deformation and prestressed tendon stress state which proves good mechanieal performance and the stress is under control duri...
施工技术 2010年3月 66 CONSTRUCTION TECHNOLOGY 第39卷第3期 某多层工业厂房楼板振动测试与分析 杜锐 (山西四建集团有限公司,山西大原030012) [摘要]介绍机器振动引起某厂房结构的楼板振动的测试结果,得到动力设各的扰力、频率、现有隔振支座的工作 情况以及楼板强迫振动的响应特点.结果表明,楼板振动仅在振动筛所在的轴线内较大,在水平方向振动衰减较 快而振动在竖直方向有放大的趋势.基于现场测试结果,利用ANSYS有限元软件对4种不同工况下楼板的简谐强 迫振动进行了计算机仿真分析,得到各标高层楼盖结构的振动和传递规律,结合测试结果对楼板振动原因进行了 分析. [关键词]工业厂房;楼板振动;模态分析;有限元分析 [中围分类号]TU311.3 [文献标识码]A 【文章编号]1002-8498(2010)03-0066-04 Vibration Test and Analysis About Some Multi-story Factory Building Floor Du Rui (China Shanxi Sjian Group Co.Lad.Taiyuan Shanxi 030012 China) Abstract:In this article the author shows vibration test results of some factory building floor induced by apparatus vibration.The test obtains disturbing force and frequency of power equipment working conditions of the existing isolation bearing and response of floor vibration.The test results are as follow: floor swing is larger in axis of vibrating screen;the vibration amplitude is damped quickly in horizontal direction and is amplified in vertical direction.According to the test results puter simulations of simple harmonic vibration are carried out corresponding to four vibration cases with ANSYS software. Through parison and analysis the vibration transmitting orderline and characters at each floor and in the vertical direction have been gotten. Key words:factory building;floor vibration model analysis;finite element analysis 振动问题在现代工业生产中普遍存在,振动设构楼板及梁、柱之间的传递及放大规律,特对该结构进 备在运行过程中对厂房产生持续激励,有可能诱发厂行了现场楼板振动测试,以评估该结构楼板的振动量 房结构或构件的强迫共振.如果处理不当,结构振动级及其对结构和工人健康的...
施工技术 2013年5月上 86 CONSTRUCTION TECHNOLOGY 第42卷第9期 D01:10.7672/sgjs2013090086 某外墙组合保温技术在新农村住宅中的应用* 杜书廷 (许昌学院土木工程学院,河南许昌461000) [摘要]以膨胀玻化微珠保温砂浆和淤泥烧结保温砖为材料,构建了外墙内保温、墙体构造自保温、外保温共同作 用的三组合外墙保温技术.结合某新农村住宅工程,分析了其构造做法、材料选用及施工要点,并对其使用效果进 行了分析和总结.实施结果表明:该组合保温技术构造合理,保温效果好,安全性高,施工方便,绿色环保. [关键词]建筑节能;保温;住宅工程;玻化微珠保温砂浆 [中图分类号]TU55.1 [文献标识码]A [文章编号]1002-8498(2013)09-0086-04 Application of Outer-wall Combination Thermal Insulation Technology in Some New Rural Residence Du Shuting (School of Civil Engineering Xuchang University Xuchang He'nan 461000 China) Abstract:Using expanded and vitrified microsphere insulation mortar and busted slit bricks as the main material a bined three-layer thermal insulation technology was established for external walls which consists of the inner surface insulation layer constructional wall insulation layer and external surface insulation layer.Using a new rural residential project as an example the construction details material selection and construction methods were analyzed.The application effect was also analyzed and summarized.It is shown that the bined thermal insulation technology has many advantages such as proper structural detailing good insulation effect high safety level simple construction and environmental protection. Key words:building energy-saving:insulation residential projects;vitrified microsphere insulation mortar 本文在内外组合保温的基础上,通过提高墙体色面砖,上部楼层外墙外饰面为灰色涂料,卫生间 构造自身保温性能,构建了外墙外保温、自保温、内 和厨房内饰面为白色面砖,其他房间外墙内饰面为 保温共同作用的三组合保温系统,并以某新型农村 白色涂料.本工程外墙采用了以无机轻质保温砂 住宅工程为例,对其技术构造、材料选用等问题进 浆和淤泥烧结保温砖为主要材料的三组合保温 行分析. 构造. 1工程概况 2外墙三组合保温构造 本工程为某新型农村社区住宅楼,总建筑面积 2.1外墙保温构造 2244.48m2 共5层,1层为层高2.5m的储藏室,2 该工程三组合外墙保温构造如图1所示(其中 层以上为层高3m的居住空间,主要檐口高度 一般房间外墙构造如图1a所示,厨房、卫生间外墙 15.2m 砖混结构,耐火等级为二级,抗震设防烈度 构造如图1b所示,储藏室外墙构造如图1c所示). 为7度;外墙厚均为240mm 外窗为塑钢中空玻璃 构造层次由内至外依次为①240mm厚淤泥烧结保 窗,建筑体形系数为0.36;储藏室外墙外饰面为灰 温砖墙;②8~10mm厚1:3水泥砂浆找平层;③2~ 3mm厚界面砂浆;④钢丝网铺栓;⑤膨胀玻化微 2012年度河南省重点科技攻关项目(122102310398):2013年度许 昌市科技攻关计划项目(3008) 珠轻质砂浆保温层,内保温层为20mm厚,外保温层 [作者简介]杜书廷,副教授,E-mail:dst_xiao@1...
[关键词】核心筒:混凝土;SRC节点:施工技术 [中围分类号]TU755[文献标识码】A[文章编号]1002-8498(2012)04-0044-03 JointDetailedDesignofSomeComplexSRCCoreTubeStructure Li Xiaorun,Wang Hailong,Li Weinan,Wu Changdong,Chen Weihai (China Metallurgical Buildings ResearchInstitute Co.,Ld.,Bejing100088,China) Abstract:Steel reinforced concrete (SRC)structure bines the advantages of steel structure and concrete structure,which is applied widely in high-rise frame structures. Combined with the actual project,the influence of joint .connection choice,joint structure of shear wall and SRC column,joint of SRC concealed column and concealed beams on the construction are researched. The making process and construction key points of SRC column are described,and the problems could be happened and
Key words;core tube; concrete; SRC joint; construction
钢骨混凝土结构就是将钢骨以及纵筋、箍筋和节点构造等方面,介绍其对结构施工的影响。
施工技术 2014年1月上 104 CONSTRUCTION TECHNOLOGY 第43卷第1期 D0I:10.7672/8gjs2014010104 某堆场真空联合堆载预压技术研究* 张永宏,汤丽军2,吴方华3,王文宇4,李明东 (1.淮海工学院土木工程学院,江苏连云港222005;2.中交一航局第二工程有限公司,山东青岛266071; 3 锦宸集团有限公司,江苏南京210037;4.中国化学工程南京岩土工程公司,江苏南京210044) [摘要]连云港金港湾国际物流园区建于沿海软土地区,运货车辆荷载大,对堆场的强度要求高.为探寻在软土中 修建经济合理的堆场施工方案,对③区采用“真空堆载”的方法对堆场软土地基进行处理,结果表明,该方法更有 利于加固地基的稳定,提高土性较为明显,经济合理. [关键词]地基;软土;堆场;真空联合堆载预压;施工技术 [中图分类号]TU753 [文献标识码]A[文章编号]1002-8498(2014)01-0104-05 Study of Vacuum-surcharge Preloading Technique in Soft Soil of Some Yard Project Zhang Yonghong' Tang Lijun2 Wu Fanghua Wang Wenyu' Li Mingdong' (1.College of Civil Engineering Huaihai Institute of Technology Lianyungang Jiangsu 222005 China: 2.No.2 Engineering Co.Ltd.of CCCC First Harbor Engineering Co. Lid.Qingdao Shandong 266071 China; 3.Jinchen Group Co.Ltd.Nanjing Jiangsu 210037 China:4.China Chemical Engineering Nanjing Geotechnical Engineering Corporation Nanjing Jiangsu 210044 China) Abstract:Lianyungang Jingangwan international logistics park is constructed in the coastal soft soil the freight trafficloads is large so the requirement of the yard is high.Vacuum-surcharge preloading technology was adopted for the soft soil foundation treatment.Engineering practice shows that this technology was more useful for foundations stability and it improved soil parameters and obtained good economic effect. Key words:foundations;soft soil;yards;vacuum-surcharge preloading;construction 1工程概况 由表1中数据可知,场地软土含水率高、压缩性 江苏金港湾国际物流园区建于连云港市沿海 高、渗透性低且埋藏深厚,如果不处理在荷载作用...
2012年5月上 施工技术 第41卷第364期 CONSTRUCTION TECHNOLOGY 99 某基地厂房埋件精密安装测量 吕传景1,黄桂平2,隋杰明3 (1.郑州辰维科技股份有限公司,河南郑州450001;2.华北永利水电学院资源与环境学院,河南郑州450011; 3.中国建筑第八工程局有限公司天津分公司,天津300450) [摘要]结合目前国内外的高精度大尺寸三维坐标测量设备,针对我国某基地厂房基础工位埋件安装项目的实际 情况,提出了一种基于NETO5全站仪测量系统和V-STARS摄影测量系统来进行金属结构精密安装的新的施工测 量方法,经过测量和调整,工位埋件平面间距精度平均优于0.5mm 埋件垂直度平均优于1mm/m. [关键词]测量;安装;预埋件;V-STARS系统:全站仪 [中图分类号]TU198.2【文献标识码]A [文章编号]1002-8498(2012)09-0099-05 Precise Measurement on the Installation of Steel Embedded Parts in One New Carrier Rocket Construction LǚChuanjing' Huang Guiping2 Sui Jieming' (1.Sunward Technology Co.Lad.Zhengzhou He'nan 450001 China:2.College of Source and Environment North China University of Water Resources and Electric Power Zhengzhou He'nan 450011 China; 3.Tianjin Branch of China Construction Eighth Engineering Division Co. Ltd. Tianjin 300450 China) Abstract:The authors introduce one precise installation measurement method for steel embedded parts which is used during the construction of some base plant.The NETOS total station measurement system. and V-STARS photogrammetry system are used to guide the precision installation of steel structures.After adjustment the average accuracy of the plane distance between the embedded parts is about 0.5mm and the vertical distance accuracy is about 1mm/m. Key words:measurement:installation:embedded part;V-STARS photogrammetry system;total station 近十几年来,由于激光、计算机、精密制造及计埋件系统2种(见图2). 量技术的迅速发展,在传统的三坐标测量的基础 上,又发展出了其他多种现代大尺寸空间测量方 式,这些技术的应用,极大地提高了测量工作的 精度和效率.然而,目前国内的精密测量却...
[关键词]地下工程;隧道;基坑;围护桩;插人比;侧向位移 [中图分类号]TU455;TU753.3 [文献标识码】A [文章编号]1002-8498(2013)01-0044-03 OptimizationStudiesontheInsertionRatioofOutsideExcavation RetainingPileinaPitinFoundationExcavation WangXin,MaJiaorong,WangYinchang (Shanghai Urban Construction Design & Research Institute,Shanghai200125,China) Abstract;Based on the excavation of Shanghai Pudong wiring segment of the South Xizang Road cross- river tunnel, the two-dimensional numerical model of a pit in foundation pit was established with respect to a certain condition. By adjusting the insertion ratio of the outside excavation retention piles,the variation of the lateral displacement of the retention piles was analyzed and the mechanical behavior of the excavation in this condition was investigated.With prehensive consideration of both safety and economical efficiency, the insertion ratio of the outside excavation retention pile was remended to be 2: 1 to 3: 1. Key words:underground; tunnels; foundation excavation;retaining pile; insertion ratio; displacement 目前,国内学者对坑中坑基坑稳定性和施工技 然而,国内学者对坑中坑基坑围护桩插人比的 术作了一定研究。
[关键词】基坑;富水砂性地层;变形特性;监测;数值模拟 [中图分类号]TU413.6 [文献标识码]A [文章编号]1002-8498(2013)20-0099-04 Deformation CharacteristicsAnalysisofaRailTransitDeep FoundationExcavationatWateredSandyStratum Huang Zhanjun (Nanchang Urban Rail Group Co.,Lad.,Nanchang,Jiangxi 330038,China) Abstract:The author carried out monitoring data analysis of a rail transit deep foundation excavation at watered sandy stratum using probability statistics method,and obtained the same deformation law.Based on theoretical analysis,the enclosure structure deformation characteristics and monitoring index has been further discussed,including the relationship between ground settlement and strut axial forces and the excavation influence scope.The results showed that at this stratum,the enclosure structure deformation can be easy to control,and the middle deformation is the biggest.In addition, the deformation decreases rapidly from excavation face to the bottom,which is the larger difference characteristics between the watered sandy stratum and the soft soil area. Key words;foundation excavation;watered sandy stratum;deformation features;monitoring; simulation 随着计算机技术的发展,借助分析软件,技术墙,第1道支撑采用钢筋混凝土支撑,间距9m,第2 人员已经可以对基坑工程进行较好的模拟和分析, 道支撑采用Φ800×16钢管,间距3m,第3道支撑采 并在此基础上分析、评估其对周边环境的影响。
[关键词]防水工程;地下通道;变形缝;注浆;渗漏 [中图分类号】TU746.3[文献标识码]A[文章编号]1002-8498(2013)16-0095-03 Leakage Treatment on a Underpass Project Ren Shengyuan (Jiangsu Dingda New Construction Technology Co.,Lid.,Changzhou,Jiangsu 213015,China) Abstract:The connection of a underpass was supposed to be a deformation joint,but it was actually constructed as a construction joint,which caused leakage of the floor,wall and roof at both sides of the joint.Reasons for the leakage were analyzed for this project.A design scheme as well as construction plan was adopted to treat the problem. The importance of material selection is highlighted. The construction process and key construction points are introduced. At last, the author summarizes the experience on leakage treatment design and construction. Key words:waterproofing;underpass; deformation joint;grouting;leakage 1工程概况通道连接处混凝土底板、墙板和顶板变形缝两侧均 万博国际广场地处常州市商业核心区延陵路有明显的渗漏水现象,其中底板和侧墙(靠近底板 西段,亚细亚影城、莱蒙都会等商业体环绕周边,南附近)渗漏严重(见图1)。
2013年3月下 施工技术 第42卷第6期 CONSTRUCTION TECHNOLOGY 103 D0I:10.7672/8gjs2013060103 某地下通道深化设计* 张泽良,王力尚,张建林 (中建中东有限责任公司) [摘要]地下通道有造价低、施工工艺简便、工期短等优点,可缓解主干道的交通压力.以阿拉伯联合酋长国 (United of Arabian Emirates UAE)某地下通道工程为例,介绍了地下通道的设计原则,包括荷载取值,混凝土强度 等级确定,钢筋设计以及施工图深化设计以及施工过程中的模板计算. [关键词]地下通道;深化设计;荷载;模板 [中图分类号]U449 [文献标识码]A [文章编号]1002-8498(2013)06-0103-03 Detail Design of a Underpass Zhang Zeliang Wang Lishang Zhang Jianlin China State Construction Engineering Corporation Middle East L.L.C. Abstract:Underpass has some characteristics of low cost simple construction technique and short construction period etc. which can reduce traffic pressure of the main road.For a underpass engineering in United of Arabian Emirates as an example the paper shows design principle of the underpass including determination of load and concrete grade design of steel bar detail design of construction drawing and formwork calculation for construction process. Key words:underpass;detail design;load;formworks 相对于跨路桥梁、复合立体交叉等设计形式,单位自重9kN/m3. 地下通道有着造价低、施工工艺简便、工期短等优 2)活载根据AASHT0规范活载取1.5安全 点.地下通道可大大缓解主干道的交通压力,主要 系数,为4.1kN/m2. 有以下几种交通功能:①联系主千道和支路的交 3)二次荷载二次荷载主要指风荷载:风速取 通,各行其道,避免互相干扰;②避免在高速主干道 为160km/h 设计风荷载横向为2.4kN/m2 纵向为 上调头而设置交通信号灯,提高高速主干道的通行 0.9kN/m2 任意方向为1.9kN/m2. 能力;③为阿拉伯当地地区特有的骆驼群开辟专用 1.2混凝土设计 通道而不影响主干道的交通. 1)混凝土强度等级混凝土强度等级设计依 1基本设计原则 据28d混凝土立方体试件抗压强度,并假设立方体 1.1设计荷载 试件强度为150mm×300mm长柱体试件强度的1.2 UAE结构设计采用AASHTO(American 倍.①预应力混凝土强度等级为C45/C20;②桥梁 Association of State Highway and Transportation 上部结构非预应力混凝土、桥墩、桩基和路障、桥台 0 ffici...
施工技术 2014年2月下 112 CONSTRUCTION TECHNOLOGY 第43卷第4期 D0I:10.7672/8gjs2014040112 某地下车库井点降水施工技术 李庆东,史晓红 (山西水利职业技术学院,山西运坡044004) [摘要]某地下车库基坑工程施工环境复杂,施工场地狭小,且基坑周边存在多栋高层建筑,降水施工可能会使周 边高层建筑产生不均匀或过大沉降.为保证工程安全顺利施工,通过方案比选,在确定了井点降水方案后,采取了 相应的钢管桩支护、分层放坡开挖、沉降监测等措施.沉降监测结果表明,该方案有效确保了工程的顺利进行. [关键调]地下工程;降水;支护;监测 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2014)04-0112-03 Construction of Well Point Dewatering in a Underground Garage Li Qingdong Shi Xiaohong (Shanxi Water Technical Professional College Yuncheng Shanxi 044004 China) Abstract:The construction environment of a underground garage is plex and the construction site is narrow the dewatering construction will cause the uneven settlement of the around tall buildings.In order to ensure the project safety the well point dewatering scheme is ensured by scheme parison and the measures of steel pipe support excavation without any protection and settlement monitoring are adopted.The settlement monitoring shows that the construction safety is ensured. Key words:underground;dewatering;supports;monitoring 1工程概况 沉降甚至倾斜. 华林逸墅花园小区位于山西省运城市机场大 为保证工程安全顺利施工,防止降水对周边高 道与学苑路立交桥东北侧,占地约12hm2.整个场 层建筑的影响,在确定了井点降水方案后,采取了 地为非自重湿陷性场地,等级属1(轻微)级,主要 钢管桩支护、分层放坡开挖、沉降观测等措施. 由第四纪上更新统冲洪积湿陷性粉土、粉土、粉细2井点降排水 砂、黏土组成,无断层、破碎带等.其中地下车库为 2.1井点降水 框架结构,基坑平面呈长方形,南北向长118.8m 东 1)降水效果要求由于地下静水位很高,埋深 西向长101.7m ±0.000m相当于绝对标高 在4.5~5.6m 而基坑开挖深度为6.0m 并且设计 370.800m 场地自然标高为-0.800m 车库基坑设 要求工程施工时必须将地下水位降至基坑底面 计标高为-6.800m 开挖深度为6.0m 属深基坑工 1.0m以下,所以基坑内大部分区域水位降深在 程.基坑周边5栋高层建筑均采用筏板基础,均为 2.5m左右.在降水过程中要监测水位下降数据,同 地下1层、地上18层的剪力墙结构,东边的15号楼 时控制地下水位下降速率,有效地减少因降水导致 距基坑边缘不到2m 西边的3 4号楼距基坑边缘不 的基坑周边建筑物不均匀或过大沉降的可能. 到5m 南边的1 2号楼距基坑边缘不到10m.根据 2)井点降水方案设计时未采用止水帷幕隔 地质勘察报告,地下水埋深小于基坑开挖深度,所 断基坑外侧地下水,而是在基坑内布设井点降水, 以工程施工时必须进行降水.但由于特殊的周边 主要是因为周边高层建筑主体已完工,不便进行钻 环境,降水给施工带来了不安全因素,如果施工方 孔灌注桩施工.井点降水主要有2种方案:①设 案和操作不当,可能会使周边高层建筑产生扰动、 600mm的降水井30口,井深12~15m 井点距 [作者简介]李庆东,副教授,E-mail:xyeley@sohu.eom 离≤20m;②设b600mm的降水井12口,井深22m. [收稿日期]2013-09-13 经设计、勘察、监理、建设、施工等单位反复研究,邀 万方数据 2014No.4 李庆东等:某地下车库井点降水施工技术 113 请有资质的地下水资源公司现场考察后,从...
施工技术 2014年2月下 46 CONSTRUCTION TECHNOLOGY 第43卷第4期 D0I:10.7672/sgjs2014040046 某地下车库上浮事故中结构破坏机理分析与加固 卢著辉,徐正来,翁俊,姚晟洁 (上海房屋工程建设技术发展有限公司,上海200051) [摘要]某新建地下车库上部覆土施工未完成,暴雨后地下水位上升引起车库上浮,造成地下车库构造严重破坏. 结合工程实际情况,对该上浮事故导致的地下车库结构破坏机理进行了分析,并针对各类构件的破坏提出了可行 的加固处理措施,并详细介绍了受损的柱、梁、底板、顶板等部位的加固处理措施.结果表明:通过加固处理,受损 构件得到修复,确保了工程安全. [关键词]加固;地下车库;上浮;破坏机理 [中图分类号]TU943 【文献标识码]A [文章编号]1002-8498(2014)04-0046-03 Structural Damage Mechanism Analysis and Strengthening in an Underground Garage Floating Accident Lu Zhuhui Xu Zhenglai Weng Jun Yao Shengjie Shanghai Buildings Engineering Technology Development Co.Ltd. Shanghai 200051 China) Abstract:The floating accident of a newly built underground garage was caused by heavy rain and its covering soil placement had not been pleted.Combined with actual conditions the damage mechanism of the underground garage structure in the accident is analyzed and the strengthening treatments for different structural members are proposed including the structure member of columns slab and top plate.The results show that the damaged ponents are repaired after strengthening and the project quality is ensured. Key words:strengthening;underground garage:floating;failure mechanism 0引言 土强度等级均为C30.地下车库结构平面布置如图 随着城市的不断发展,对地下空间资源开发利1所示. 用要求越来越高,大面积的单层或双层地下车库不 断出现.地下结构的抗浮验算在相关规范中已有 ①②④③⑥⑦⑧⑨⑩①203 规定,在正常设计工况下,这类地下车库的抗浮稳 8100×9 定性一般均能满足;但是,施工过程中的突发事件 20 8 M 可能导致各种不利因素的叠加,从而引发地下结构 的上浮事故.本文对某新建地下车库在施工过程 中的上浮事故原因进行了分析,并对该事故导致的 8X004 ① 各类结构构件破坏提出了针对性的加固处理措施. G 1工程概况 某地下车库平面形状近似成矩形,南北向总长 “号楼 约94.35m 东西向总长约80.50m 单层框架结构, 62X0006 C 层高约3.9m 框架柱截面一般为600mm×600mm B 地下车库框架梁截面一般为500mm×900mm 混凝 -0019 [作者简介]卢著辉,工程师,国家一级注册建造师,E-mail:Luzhl001 图1地下车库结构平面 @126.c0m Fig.1 Underground garage structure plan [收稿日期]2013-07-19 万方数据 2014No.4 卢著辉等:某地下车库上浮事故中结构破坏机理分析与加固 47 2012年7月该地区遇到暴雨天气,场地地下水 位上升,地下车库内发生严重积水现象,最大水深 达2m.此时地下车库结构施工已完成,但上部尚未 完成覆土.现场人员急于抽取地下车库内积水,导 致地下车库内外瞬时最高水位差约3m 地下车库随 即发生不均匀上浮.目前场地地下水位已明显下 降,同时地下车库上部已完成覆土,变形情况得到 图2地下车库变形示意 Fig.2 Underground garage deformation 一定改善,但部分地下车库结构已发生损坏,需进...
2016年2月上 施工技术 第45卷第3期 CONSTRUCTION TECHNOLOGY 73 D0I:10.7672/sgjs2016030073 某地下室工程防水施工技术 张廷会,伍坪,杨德全2 (1.四川城市职业学院,四川成都610101;2.四川省建筑机械化工程公司,四川成都610051) [摘要]四川城市职业学院眉山校区行政楼地下室工程采用H水泥基渗透结晶防水施工技术、结合该工程实践, 介绍了防水施工准备、施工流程、关键施工技术以及质量保证措施等相关施工关键措施.实践证明,该地下工程防 水效果良好,保证了地下室工程安全施工和安全运营. [关键词]防水工程;地下室;水泥基渗透结晶;防水材料;施工技术 [中图分类号]TU761.11 [文献标识码]A [文章编号]1002-8498(2016)03-0073-03 Construction Technology of Basement Waterproofing in a Project Zhang Tinghui' Wu Ping' Yang Dequan2 (1.Urban Vocational College of Sichuan Chengdu Sichuan 610101 China:2.Sichuan Construction Mechanization Engineering Company Chengdu Sichuan 610051 China) Abstract:Urban Vocational College of administration building basement using GH cementitious capillary crystalline waterproofing construction technology.Combining the engineering practice waterproof construction preparation waterproof construction process the key construction technology and key measures related to construction quality assurance measures are introduced.Practice has proved that the waterproofing technology of basement has a good effect ensuring the safety of basement construction and safe operation. Key words:waterproofing;basement;cementitious capillary crystalline;waterproofing materials; construction 0引言 道与眉州大道交叉口东南角,学校占地面积约50万 水泥基渗透结晶型防水材料(cementitious m2(750亩),学生规模9000人.该校区行政楼地 capillary crystalline waterproofing materials CCCW)中 下工程的防水等级为二级. 含有的活性化学物质通过水向混凝土内部渗透,在 四川地区地下水丰富且地面降水量大,地表水 混凝土中形成不溶于水的结晶体,填塞毛细孔道,向下渗透及地下水向上渗透,构成了一个比较活跃 从而使混凝土致密、防水.这种防水材料...
[关键词]地下工程;半逆作法;支护;施工技术 【中图分类号】TU753.6[文献标识码】A[文章编号]1002-8498(2013)07-0015-04 Semi-reversedConstructionMethodofanUndergroundCommercialStreet Cao Hexi,Kong Ming,Deng Liping,Zhuang Niebin (Jiangsu Yizheng Construction Co.,Lad.,,Yizheng,Jiangsu211400,China) Abstract;An underground mercial street in Shenyang adopted a semi-reversed construction method, i.e. the boundary pile wall protection and rof plate were constructed first and the wall columns and bottom plates was constructed with the top-down method.With respect to the construction difficulties of this project, the corresponding construction process and construction method are presented in detail in this paper. The advantages and disadvantages of the semi-reversed construction method were summarized. Application of the semi-reversed construction technology effectively protected the normal operation of the underground shield tunnel and metro, shortened the time of traffic interruption,and obtained obvious social and economic benefits. Key words:underground; semi-reversed construction method; supports; construction 1工程概况1)中华路为商业街,两侧建筑物密集,距离本 沈阳朗勤商道中华路地下商业街工程地处沈工程的主体结构较近,施工场地狭小,上部各种管 阳市和平区,位于已建成通车的沈阳地铁1号线沈线密集,需采用围护结构有效支护。
2013年11月下 施工技术 第42卷第22期 CONSTRUCTION TECHNOLOGY 109 D0I:10.7672/9gjs2013220109 某地下人防工程深井降水井口封堵施工技术 陈杏祥 (应天职业技术学院管理工程系,江苏南京210046) [摘要]以某市地下人防工程基坑深井降水为例,为有效降低地下水位,利于深基坑的开挖,确保周边大桥、桥头、 主干道和河堤的安全,在尽量减少深井数量的同时,将全部降水深井布置在建筑物基础底板中间,但这给降水结束 后井口的封堵带来了一定的困难.结合现场工况采取了一种基于深井降水“先置后堵”的井口封堵方法,该种封堵 方法分为3步:一是钢管的制作与预埋;二是预制井口封堵配件;三是封堵配件的安装与封堵,从而避免了因降水 封口处理不当出现的建筑物渗漏水现象. [关键词]地下工程;基坑;降水;施工技术 [中图分类号]TU753.66[文献标识码]A [文章编号]1002-8498(2013)22-0109-03 Construction of Wellhead Shutoff for Deep Well Dewatering in an Underground Civil Air Defence Chen Xingxiang (Department of Management and Engineering Yingtian College Nanjing Jiangsu 210046 China) Abstract:Based on excavation of deep well dewatering in the city of an underground civil air defence author analyzes the method which may lower the groundwater levels effectively help the deep foundation excavation and ensure the safety of the surrounding bridge the main road and the embankment.While minimized the quantities of deep well all precipitation deep wells are arranged in the middle of the foundation slab of the building but this brings some difficulties for wellhead shutoff after the precipitation.Combined with field conditions to take a deep well dewatering first set after shutoff in the wellhead shutoff the closure method is divided into three steps which are produce and embedding steel pipe first;prefabricating wellhead shutoff accessories second;shutoff accessories installation and sealing thirdly these may be avoid undue buildings precipitati...