施工技术 2015年9月下 98 CONSTRUCTION TECHNOLOGY 第44卷第18期 D01:10.7672/gjs2015180098 承压砂土地层桩洞法施工动态效应及其控制研究* 宋云财 (中国铁建大桥工程局集团有限公司,天津300300) [摘要]以北京地铁7号线六标地铁车站为工程背景,采用FLAC3D有限差分软件对工程八导洞开挖、车站主体结 构施工进行模拟,研究了桩洞法施工中八导洞施工工序和几种不同导洞开挖方案引起的地层沉降变化规律.研究 表明,承压砂土地层中桩洞法先开挖上层导洞比先开挖下层导洞引起的地表沉降小;在车站施工的工序中,导 洞是引起地表沉降的主要因素,进人扣拱阶段后,地层开始隆起,地表沉降逐步减小;基于以上认识,对比分析了六 导洞方案与八导洞方案引起的变形特性,提出了承压砂土地层柱洞法施工地表沉降控制的施工建议. [关键词]地下工程:暗挖车站;桩洞法;群洞效应;数值模拟 [中图分类号]U45 [文献标识码]A [文章编号]1002-8498(2015)18-0098-07 Construction Dynamic Effect and Control Research of PBA at Confined Sandy Layers Song Yuncai China Railcay Construction Bridge Engineering Bureau Group Co.Ld.Tianjin 300300 China) Abstract:This paper takes Beijing metro line 7 bid-section 6 station as the engineering background and analyzes the excavation of eight pilots and the construction of station structure with the FLAC3D which is a finite difference software.The change law of ground settlement caused by the construction procedure and the excavation method of eight pilots during construction with pile beam arch method are researched. The research shows that the lower ground settlement caused by construction in which the up pilots be excavated firstly in confined sandy soil layer.Compared with other construction procedures the pilots exeavation is the major factor of ground settlement.In the buckle arch construction the ground heave is appeared and the ground settlement gradually reduces.Based on the above research this paper analyzes the deformation behavior caused b...
[关键词]隧道工程;承压水溶洞;突水通道;细观模拟;流固耦合 【中图分类号】U459.8 【文献标识码】A [文章编号]1002-8498(2015)17-0104-05 Study on Meso-mechanical Simulation of Groundwater Inrush Pathway MechanismBetweenHigh-pressuredKarstCave and Tunnel Sun Feng,Teng Keyan,Zhao Lei, Hu Mengqian,Wu Han,Lin Hui (NuclearandRadiationSafety Cente,MinistryofEnvironmenProtetion,Bejing100082,China) Abstract; Based on the karst water burst geological modes, numerical tests with PFC under coupling environment are conducted to investigate the initiation of fractures,activation of karsts cave and formation of groundwater inrush pathway during the tunnel passing closely by the karst structures with high pressure. With the understanding of damage evolution, stress field and seepage flow field, the transformation of floor rock mass from water-resisting strata to inrush pathway is clearly iluminated,and the groundwater inrush pathways are calibrated.When the tunnel passes closely by the karst structures, keeping the pleteness and stability of the rock pillars is of key importance to avoid water burst and to minimize their relevant loss.Combined with the engineering case,themeaning of this research lies in the fact that PFC could make the microcosmic research of water burst mechanism possible in the future. Key words: tunnels; high-pressured karst cave; groundwater inrush pathway; meso-mechanical simulation; fluid-solid coupling 0引言 公式,刘招伟也对山岭隧道岩溶突水进行了力学分 岩溶突水、突泥是隧道施工和运营过程中常见的析。
[关键调】地下工程:桩基础;打人式沉管夯扩桩;淤泥质土;承载力:检测 [中图分类号】TU753.3 [文献标识码]A[文章编号]1002-8498(2012)13-0058-04 Wang Yuejun (Gannu Third Construction Group Corporation, Lanzhou, Gansu 730030, China) technical diffculties and construction technologies in muddy soil.Various quality problems in the application of driven ramming-expanded sinking pipe piles were discussed and measures were proposed to minimize the adverse effects of muddy soil on the construetion. The engineering practice shows that these measures can effectively reduce the influence of horizontal load on the quality of piles. It also shows that economic and social benefits. q oe kppnm tododdyuns popud-gu usp tdpunorrapun ispaom a capacity; detection 桩基础是一种常用的基础形式,是深基础的一及施工中所用到的各种桩基形式的优缺点,通过比 种,当天然地基上的基础沉降量过大或地基稳定性较得出夯扩沉管灌注桩,不仅解决了桩身颈缩、断 不能满足建筑物的要求时,常采用桩基础。
施工技术 2014年4月下 80 CONSTRUCTION TECHNOLOGY 第43卷第8期 D01:10.7672/sgjs2014080080 成都火车南站伞状雨篷幕墙施工技术 曹亚军,车志岩,江腾腾,苏莼 (中建三局装饰有限公司,北京100070) [摘要]成都火车南站发散式玻璃雨篷群造型独特,骨架采用重型钢结构,由中心点向周围散开.伞状雨篷玻璃作 为雨篷外覆盖结构,弧形双曲面玻璃雨篷在具备吸收调节功能的前提下,利用曲面连贯角度调节幕墙系统实现幕 墙玻璃板块的安装,以满足建筑整体的外观效果.伞状雨篷结构高度高,悬挑跨度大,玻璃幕墙分格复杂多变,对 施工安全、质量和进度要求极高.针对实际施工编制专项施工方案,逐层分解,实时监测,综合管理,完成幕墙玻璃 的精准安装. [关键词]钢结构;火车站;雨篷;玻璃幕墙:施工技术 [中图分类号]TU767.6 [文献标识码]A [文章编号]1002-8498(2014)08-0080-03 Construction of Umbrella-shaped Glass Curtain Wall Awning in South Chengdu Railroad Station Cao Yajun Che Zhiyan Jiang Tengteng Su Chun Decoration Company of China Construction Third Engineering Bureau Beijing 100070 China) Abstract:The divergent glass awning group scatters in all directions from center in South Chengdu Railroad Station and the skeleton adopts heavy steel structure.As outer cover structure the umbrella glass curtain wall awning uses curved surface angle adjust curtain wall system to install glass board to meet the outer effeet of the whole building.The umbrella-shaped awning structure is high and the cantilever length is large the partition of the glass curtain wall is plex which have high requirement for construction safety quality and construction progress.By preparing construction scheme and real-time monitoring the glass board is installed correctly. Key words:steel structures;railroad stations;awning;glass curtain wall;construction 1工程概况 成都火车南站枢纽城市综合体项目二标段工 程总规划用地面积56649.8m2 总建筑面积 172521m2 其中发散式伞状玻璃雨篷位于商业裙楼 与办公楼之间,作为商业裙楼与办公楼过渡的纽 带.伞状雨篷造...
[关键词】钢结构;网壳;析架;提升架;设计;应用 [中图分类号】TU758.15 【文献标识码】A [文章编号]1002-8498(2012)14-0090-05 Design andApplication of Triangle-shaped Lattice Lifting Framein Chengdu New Century Global Center Xing Zunsheng.Xu Dehao,Liu Zhonghua (Zhejiang Jinggong Stel Building Co.,Lad.,Shaoxing,Zhejiang 312030,China) AbstractDepending on the structural forms and site conditions,traditional lifting frames are normally cantilever beams or portal frames.The authors introduced the design concept of triangle-shaped laticed lifing frame, which fit with the arched roof of central entertainment area of Chengdu New Century Global Center.The prototype of lifting frame and its design method are introdueed in detail.As a demonstration, calculation modei was built for the lifing frame of Roof 3, and analysis results shows its deformation satisfies the code requirement.When using this kind of liting frames, special atentions should be paid to the following issues: 1. strengthen the reinforcement near the top surface of the foundation; 2. Ensure the rigidity of the frame foot; 3. control the verticality of the lifting frame. Key words;steel structures; shells; trusses; lifting frame; design; applications 1工程概况 提升”的施工方法,如图2所示。
2012年4月下 施工技术 第41卷第363期 CONSTRUCTION TECHNOLOCY 成都国金中心T1&T2塔楼设计与施工 武雄飞,曲贵阳,袁渊 (中建三局成都公司,四川成都610041) 【摘要】成都国金中心T1&T2塔楼建筑高度247.8m 采用框架-核心筒结构体系.结构设计采用性能化设计思 想,确定明确的总体及重要构件的抗震性能目标,提高结构的可靠性.在具体施工过程中,通过课题攻关,解决了 在复杂渗水环境下超厚外墙的施工、筏板大体积混凝土裂缝控制、钢筋密集部位构件混凝土振、高空钢管内混凝 土浇筑及钢管柱变截面等一系列问题,取得明显的经济效益和社会效益. 【关键词]高层建筑;混凝土:性能化设计;定型工具 【中图分类号]TU972:TU974 [文献标识码】A【文章编号]1002-8498(2012)08-0007-04 Design and Construction of T1 T2 in IFC Chengdu Wu Xiongfei Qu Guiyang Yuan Yuan Chengdu Branch China Construction Third Engineering Bureau Chengdu Sichuan 610041 China) Abstract:The architectural height of TI T2 in IFC Chengdu is 247.8m.The TI T2 are designed as frame-core tube structure.With performance-based design of buildings the seismic goals for integral structure and important ponents are decided to improve the reliability of the buildings.Good economical and social effect is obtained through research key problems such as extra-thick external walls construction under plex seepage conditions mass concrete cracks control of the raft concrete vibration for the ponents with dense reinforcement concrete pouring in steel pipe at high altitude as well as changing section of steel pipe column. Key words:tall buildings:concrete:performance-based design:stereo type tools 1工程概况 成都国金中心工程位于成都市锦江区红星路 与大慈寺路交叉路口的东南角,总占地面积 54857.04m2 总建筑面积763718m2 其中地下室建 筑面积227712m2.项目主要分为五大功能区域: 地下3~5层为地下车库,地下1~2层及地上1-6 层、局部7层为商业,商业裙楼最高42.15m 总建筑 面积153467m2;裙楼上部为4栋塔楼,包括2栋办 公大楼T1&T2一栋住宅大楼T3和一栋酒店大楼 图1成都国金中心效果 T4.办公大楼T1&T2结构基本对称(...
施工技术 2014年1月下 28 CONSTRUCTION TECHNOLOGY 第43卷第2期 D0I:10.7672/8gj82014020028 成都华置广场异形钢结构施工技术* 曹阁,许志华,刘宁波,张振兴,王旭 (中建三局建设工程股份有限公司成都分公司,四川成都610041) [摘要]结合成都华置广场项目特色天窗的设计,在施工过程中对天窗钢结构进行受力传递方向分析,并将其与设 计受力传递方向做对比,发现其主梁与次梁传力方向正好相反,在施工过程只能先施工次梁后施工主梁,因此介绍 了本项目特色天窗钢结构逆向施工的施工过程. [关键词]钢结构;异形天窗;主梁;次梁;胎架;施工技术 [中图分类号]TU758.1 [文献标识码]A [文章编号]1002-8498(2014)02-0028-04 Construction of the Special-shaped Steel Structures of Chengdu Huazhi Plaza Cao Ge Xu Zhihua Liu Ningbo Zhang Zhenxing Wang Xu (China Construction Third Engineering Co.Ltd.Chengdu Construction Company Chengdu Sichuan 610041 China) Abstract:Combined with a characteristic skylight design of chengdu Huazhi Plaza during the construction process the loading mechanism of steel skylight structure is analysed.In addition when pared with the design loading process it is found that the loading direction in the main-beam and sub-beam is different.Therefore when under construction it is necessary to construct sub-beams first and then is main-beam.The main purpose of the article is to introduce the characteristic steel skylight downward construction process within the project. Key words:steel structures;special-shaped skylight;main-beam;sub-beam;jigs;construction 1工程概况 华置广场项目位于四川省成都市青羊区太升 南路地段,总建筑面积约43万m2 地上共设酒店、 办公楼、住宅TC、住宅TD等4栋塔楼以及商业裙 楼.其中眼睛形天窗位于裙楼中庭位置,具有实用 性及美观性双重作用,天窗骨架为钢结构,其结构 异形不规则,如图1所示. a钢结构三维图 b眼睛天窗模型效果 本项目针对眼睛天窗的结构特性,采用先施工 图1钢结构三维模型、眼睛天窗横型效果 次梁后施工主梁的方法,过程中采用钢胎架对次梁 Fig.1 3D model of the steel structures 进行支撑,并搭设吊架作为施工操作架,配合使用 and e...
[关键词】车站;钢结构;逆作法;换撑;施工技术 [中图分类号】TU393.3[文献标识码]A[文章编号】1002-8498(2011)20-0024-04 Reverse Construction ofSteel Structure and Support Replacement in West Station House of Chengdu East Railway Station Lo Ming (China Railway Construction Engineering Group Co.,Lad.,Nanjing,Jiangu 211521,China) AbstractThe pipe truss structure is designed for west station house roof structure in Chengdu East Railway Station with concrete substructure.The difficulties include the hoisting of roof steel structure, the short construction period and plex construction.The author introduces reverse construction of steel structure and support replacement technology.Furthermore,the structure is calculated with finite element method.The results show that the technology is feasible to ensure construction safety and quality. Key words;stations; steel structures;reverse construction method; support replacement; construction
1工程概况 成都东客站位于成都市成华区,主站房建筑面 积约11万㎡²,车站建筑部分为地上2层、地下3 层,其中地面层为站台层,层高9m;地上2层为高架 候车层,局部设置商业夹层,屋面高39m;地下1层 为出站和综合换乘通道,东西两侧与城市交通体系 连接;地下2层为地铁2号线站台层;地下3层为地 铁7号线站台层(见图1)。
成都东客站西站房屋盖采用空间桁架结构体图1西站房结构示意 系,设计采用三跨连续结构,为42m+66m+42m大Fig.1West station house structure 跨度结构,两侧各自向外悬挑27m,屋面建筑总高线→地铁2号线→地铁换乘大厅→-6.45m层→ 39m。
[关键词】桥梁工程;连续梁桥;悬浇;施工;监控 [中图分类号】TU196 【文献标识码】A [文章编号】1002-8498(2012)15-0069-05 Research onProcedural Monitoring Operation in Cantilever-castingBridge Construction Liu Yong',Yan Baohua²,Cao Wei²,Wang Kejia²,Zhang Aijiang',Li Kai (1.Beijing Municipal Engineering Research Institute,Beijing 100037,China; 2.Bejing Gonglian Jieda Road Maintenance Co.,Ld.,Beijing 101300, China) Abstract:Taking the construction monitoring practice of an 88m continuous girder bridge as an example, this paper studied the key points of each phase of construction monitoring, summarized and refined the monitoring program, sorted out the key phases, made clear the prone mistakes and the solutions. The work in this paper can help the monitoring and construction personnel to understand the cores of the monitoring program, can improve the monitoring precision and monitoring efficiency. By adopting the proposed monitoring method, construction of the 88m continuous girder bridge showed good monitoring effect and the main bridge was closed naturally with an closure error of only 7mm. Key wordsbridges; continuous beam bridges; cantilever-casting; construction; monitoring 臂挂篮法,结构需要从悬臂体系转换为连续体系,监控的实际操作方法,监控人员往往不明白各阶段 导致了主梁复杂的内力以及位移变化。
2016年11月下 施工技术 第45卷第22期 CONSTRUCTION TECHNOLOGY 95 D0I:10.7672/5js2016220095 带桩帽的刚性桩复合地基受力性能研究* 刘明泉12,李晓芝,刘春原2 (1.唐山学院土木工程学院,河北唐山063000;2.河北工业大学土木工程学院天津300401) [摘要]针对沿海公路改造工程中遇到的困难,提出带桩帽的刚性桩复合地基概念.根据实际工程项目,采用 ABAQUS有限元分析软件,建立分析模型.分析了带桩帽的刚性桩复合地基中,桩土应力比、桩身轴力、桩身侧摩 阻力和路基、地基中的竖向应力分布情况.研究结果表明,由于桩帽的存在,能大大减小桩顶的应力集中,带帽刚 性桩的承载力比单桩有所提高.但其侧摩阻力曲线存在中性点,与刚性桩有所区别. [关键词]复合地基;刚性柱;柱帽;桩身轴力;侧摩阻力 [中图分类号]TU473 [文献标识码]A [文章编号]1002-8498(2016)22-0095-04 Mechanical Properties Study of Capped Rigid Pile Composite Foundation Liu Mingquan'.2 Li Xiaozhi' Liu Chunyuan2 (1.School of Civil Engineering Tangshan Unirersity Tangshan Hebei 063000 China; 2.School of Civil Engineering Hebei University of Technology Tianjin 300401 China Abstract:Aimed at the difficulties encountered in the reconstruction project of the coastal highway the concept of capped rigid pile posite foundation is presented.According to the actual project the analysis model is established by using the ABAQUS finite element analysis software.The stress ratio of pile to soil the axial force of pile the lateral frictional resistance of pile and the vertical stress distribution in the subgrade and foundation are analyzed.The research result shows that capped rigid pile can greatly reduce the stress concentration in posite foundation and the bearing capacity of capped rigid pile is improved greater than that of single pile because of the existence of a pile cap.But the lateral friction resistance curve exists neutral point which is different...
[关键词】防水工程;返潮;人防工程;地下室 [中图分类号】TU761[文献标识码】A [文章编号]1002-8498(2013)16-0093-02 Cause Analysis and Treatments of Damping of Ground FloorinHouseswithCivilDefenseBasement FengYonggang (Shanghai Zhongjin Consruction Group Co.,Lad.,Shanghai 200060,China) Abstract:Because of special requirements of civil defense project design,the newresidential building need to be built on the top of air defense basement,and the pipe layer must be added between first floor and civil defense basementroof.Because of problems of design orconstruction,the damping of firstfloor and wall will affect the use by residents.The targeted analysis is made to damping reasons, and the effective treatments are proposed. Key words:waterproofing; damping;civil defense;basement 随着城市的发展,土地资源越来越匮乏,为了年7月开工至2008年12月完成。
施工技术 2010年11月 102 CONSTRUCTION TECHNOLOGY 第39卷第11期 巴基斯坦恰希玛C-2工程核安全壳钢衬里 及附件的焊接优化施工 马新朝 (中国核电工程公司北京四达贝克斯工程监理有限公司,河北石家庄050021) [摘要]介绍了巴基斯坦恰希玛-2工程核电站安全壳钢衬里的构成,从筒体的分层、弯顶吊耳、钢衬里的制作安 装、牛腿H形接头的焊接工艺及焊接检测等方面入手,论述了钢衬里制作的焊接优化施工技术,指出了C-2安全壳 制作优化的基本特点和工艺,提出了防止焊接变形及缺陷的措施.结果表明,合理的优化设计与施工,保证了工程 质量,降低了生产成本. [关键词]安全壳钢衬里;焊接优化;穹顶吊耳;焊接检测 [中图分类号]TU758.162 [文献标识码]A [文章编号]1002-8498(2010)11-0102-05 Welding Optimization for Steel Liner and Attachment of Nuclear Containment in Chasima C-2 Project of Pakistan Ma Xinchao Beijing Starbecs Engineering Management Co.Iad.of CNNC China Nuclear Power Engineering Co. Ltd.Shijiazhuang Hebei 050021 China) Abstract:The position of steel liner of containment in Chasima C-2 project of Pakistan is introduced. Based on the cylinder liftinglug of dome manufacture and installation of steel liner welding process and detection of H-joint of bracket the author expounds construction technology of welding optimization and shows basic characteristics and technique.Furthermore measures to avoid welding deformation is proposed.The result shows that reasonable optimization and construction not only ensure construction quality but also reduce the cost. Key words:steel liner of containment;welding optimization;liftinglug of dome;welding detection 1安全壳钢衬里简介 焊接,GTAW用于304L等不锈钢构件及其他重要构件 C-2工程核电站安全壳为立式钢混凝土混合结 的焊接及打底焊,现场安装用SMAW stud welding用于 构,钢衬里筒体直径为36000mm 高49606mm 8=6mm 螺柱与预埋加厚板、螺柱与钢衬里壁的焊接. 的20G筒身及6=8mm的20G弯顶衬里板外部分布加 2优化方案 劲肋及错钉,筒壁上有贯穿件168件(贯穿件由套管、 为提高施工质量,保证施工进度、降低成本,在总 加厚板、挡环、纵肋...
2014年6月下 施工技术 第43卷第12期 CONSTRUCTION TECHNOLOGY D0I:10.7672/5js2014120009 峡江水利枢纽连续箱梁一次浇筑成型施工技术 朱刘东,廖振炎 (武警水电第二总队第五支队,江苏常州213135) [摘要]江西省峡江水利枢纽坝顶拱形桥第2联采用变截面单箱单室预应力钢筋混凝土连续梁桥.介绍了混凝土 所采用的浇筑工艺、养护措施及施工中的注意事项,阐述了在预应力箱梁混凝土一次性浇筑过程中,解决混凝土拌 制、运输、浇筑时间控制、振捣等问题的施工技术. [关键词]混凝土;箱梁;预应力;浇筑;施工技术 [中图分类号]TV61 [文献标识码]A [文章编号]1002-8498(2014)12-0009-02 Construction of One-time-pouring in the Continuous Box Girder of Xiajiang Hydro-junction Zhu Liudong Liao Zhenyan No.5 Detachment of No.2 Hydropower Force of Armed Police Changzhou Jiangsu 213135 China) Abstract:The second segment of Xiajiang Hydro-junction arch bridge is continuous box girder with prestressed reinforced concrete.The concrete pouring process maintenance and attentions are introduced. The construction difficulties in concrete mixing transportation pouring time control vibrating are solved in the one-time-pouring construction. Key words:concrete;box girders:prestressing:pouring;construction 1工程概况 355 355 江西省峡江水利枢纽坝顶拱形桥第2联采用变 品为同 167.570 41 截面单箱单室预应力钢筋混凝土连续梁桥.箱梁 33167.5 断面采用直腹板断面,最大跨径为45m 跨径组合为 别 167.5187.5187.5167.5 28.75m45m28.75m 采用支墩支架式施工. a1/2支点断面1b1/2跨中断面 箱梁顶板宽7.1m 底宽3.75m 翼缘板悬臂长 图1箱梁标准横断面(单位:cm) 1.675m.支点腹板处梁高2.5m 跨中梁高1.5m Fig.1 Standard cross-section of box girder(unit:cm) 梁底面按照设计的二次抛物线变化.箱梁顶板与 箱底平行,顶板厚26cm:底板厚度从跨中至距墩顶 次浇筑成型技术具有消除传统施工工艺的施工缝、 中心1m处由25cm变化至40cm 为改善箱梁根部 提高梁体的美观性、增强梁体的整体刚度、延长梁 截面受力,在横梁两端附近截面顶、底板局部加厚; 体的耐久性和使用寿命、缩短施工周期等特点,因 跨中段腹板厚35cm 从离中墩中心线7.5m处至中 此采用此法对梁体进行混凝土施工. 墩横梁腹板厚度由35cm渐变至70cm;桥台处设置 3拌合站的选择 1.5m宽横隔梁,中墩墩顶设置2m...
2013年4月上 施工技术 第42卷第7期 CONSTRUCTION TECHNOLOGY 19 D0I:10.7672/8gjs2013070019 岩溶地区缺陷桩检测及处理措施* 黄柳云,杜静2,王家全1,吴辉琴1 (1.广西工学院土木建筑工程系,广西柳州545006;2.广西交通职业技术学院路桥工程系,广西南宁530023) [摘要]结合多项工程缺陷桩实例,采用声波透射法和钻芯法系统地对桩底持力层承载力不足、沉渣过厚、桩身局 部夹泥、桩身局部离析、桩头浮浆等缺陷的基桩进行对比分析并提出相应的补强处理方案.结果表明,采用声波透 射法检测并辅以钻芯法进行验证,可以客观评价基柱的质量,为岩溶地区桩基施工提供经济有效的技术参考. [关键词]地下工程;桩基础:缺陷桩;检测 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2013)07-0019-05 Detection of Defective Piles in Karst Area and Treatment Measures Huang Liuyun' Du Jing? Wang Jiaquan' Wu Huiqin' (1.Department of Civil Engineering Guangxi University of Technology Liuzhou Guangxi 545006 China; 2.Department of Highway and Bridge Guangxi Vocational and Techaical College of Communications Nanning Guangxi 530023 China) Abstract:Based on a number of projects parative analyses were performed to deflective piles with deficiencies such as insufficient bottom bearing capacity excessive sediment floating pulp defect with mud and segregation using sound wave transmission and core drilling method and the retrofitting treatments were proposed correspondingly.The results show that the quality of piles can be evaluated objectively using the sound wave transmission method with the assistance of core drilling method.These provide economic and effective technical references to pile constructions in karst area. Key words:underground;piles;defective pile;detection 岩溶地区地质条件复杂,地下水丰富,岩石面定工程桩应进行单桩承载力和桩身完整性检测. 高低起伏变化大,严重影响柱基础的施工质量.桩 1.1桩身完整性检测 基工程属于隐蔽工程,桩基安全直接影响着建筑物 目前桩身完整性检测规范推荐的方法主要有 的安全....
[关键词]地下工程;地基处理;岩溶地区;沉降 [中图分类号]TU472 [文献标识码]A [文章编号]1002-8498(2013)15-0093-03 Study onComplexFoundation Treatment and UnevenSettlementControlinKarstArea Tang Hong,Zhou Zhengrong (Schoolof Urban Construction,Wuhan University ofScience and Technology,Hubei,Wuhan430065,China) Abstract;Under the plex geological conditions of karst area, improper foundation treatment can cause safety problem or construction difficulty, cost increase and other adverse consequences.Taking a frame- shear wall structure as an example, this paper analyzes foundation treatment technology and foundation settlement under the bined action of soil hole in local thick overlying soil layer site,karst fissure broken belt,and the soil hole and karst fisure broken belt surrounding exist soft-plastic silty clay layers. By setting later poured belts, the uneven settlement is perfectly controlled. Key words:underground; foundation treatment; karst area; settlement 0引言 星城二段公寓楼,布置于山体的西侧,紧邻商业 岩溶是指地表中可溶性岩石(主要是石灰岩)区。
施工技术 2011年8月上 86 CONSTRUCTION TECHNOLOCY 第40卷第346期 岛状多年冻土路基差异沉降影响因素研究 宋新生 (河南城建学院交通工程系,河南平顶山467036) [摘要]在分析岛状多年冻土路基差异沉降影响因素及成因的基础上,建立了岛状多年冻土路基工后差异沉降计 算模型,系统研究了路基高度、融化盘厚度、融化盘面积、融化盘偏移对冻土路基差异沉降的影响.结果表明:路基 最大差异沉降量随着路基高度、融化盘厚度、融化盘直径的增加而增大,但差异沉降量增幅随着路基高度、融化盘 厚度、融化盘直径的增加而逐渐减缓;在相同融化盘深度、相同融化盘半径的前提下,融化盘偏移对路基差异沉降 的影响可忽略不计. [关键词]道路工程;岛状多年冻土;差异沉降;影响因素 [中图分类号]U416.1 [文献标识码]A [文章编号]1002-8498(2011)15-0086-05 Influence Factors on Differential Settlement of Island Permafrost Subgrade Song Xinsheng Department of Traffic Engineering He'nan University of Urban Construction Pingdingshan He'nan 467036 China) Abstract:Based on analyzing the cause and influence factors on differential settlement of island permafrost subgrade the authors build calculation model of post-construction differential settlement for island permafrost subgrade and systematically research on influence of subgrade height thaw tray thickness thaw tray area and thaw tray migration on differential settlement of island permafrost subgrade. The results show that the maximum differential settlement of subgrade increases with the increasing of subgrade height thaw tray thickness and thaw tray diameter.But the increase amplitude of differentia settlement gradually decreases with the increasing of subgrade height thaw tray thickness and thaw tray diameter.Under the conditions of the same depth and the same thaw tray diameter the influence of thaw tray migration on subgrade differential settlement can be neglected. Key words:road enginee...
2015年4月上 施工技术 第44卷第7期 CONSTRUCTION TECHNOLOGY 49 D0I:10.7672/5js2015070049 安哥拉换填垫层地基的沉降计算分析 彭友君1 2,杨铮2,彭博2 (1.北京城建勘测设计研究院有限责任公司,北京100101;2.北京城建设计发展集团股份有限公司,北京100037) [摘要]安哥拉浅部棕红色砂Quelo地层具有湿陷性特征,采用换填垫层进行地基处理后,沉降计算是岩土工程研 究最重要的课题.分别对换填垫层、压实地基、天然地基浸水后,通过勘探和原位测试给出了土的物理力学指标, 建立锥头阻力与地基反力系数的回归方程,完善随深度变化的沉降计算参数,按照英国标准规定的公式和算例进 行沉降计算,假定条形基础与换填垫层组成整体基础并对其可靠性进行验算,从而简化了沉降计算方法,将沉降计 算结果与实测沉降量对比分析后,说明沉降计算结果可信并满足设计要求,实体楼的浸水试验也得到了印证,安哥 拉砂土地基采用换填垫层法进行地基处理是合理的. [关键词]地基:沉降;换填垫层;反力系数:计算 [中图分类号]TU433 [文献标识码]A [文章编号]1002-8498(2015)07-0049-06 Settlement Calculation and Analysis of Replacement Cushion Foundation in Angola Peng Youjun.2 Yang Zheng? Peng Bo2 (1.Beijing Urban Construction Exploration Surreying Design Research Institute Co.Ltd.Beijing 100101 China; 2.Beijing Urban Construction Design Derelopment Group Co.Ltd.Beijing 100037 China) Abstract:The shallow red brown sand Quelo stratum in Angola has the characteristic of collapsibility and the most important subject of geotechnical engineering research is settlement calculation after foundation treatment by adopting replacement cushion.After immersion of the replacement cushion pacted foundation and natural foundation the physical and mechanical indicators of the soil are given through exploration and in-situ test the regression equation of the cone resistance and foundation reaction force coefficient is established and the settlement calculation parameters changed with depth are perfected.Settlement calculation is conducted according to th...
施工技术 2010年10月 40 CONSTRUCTION TECHNOLOGY 第39卷第10期 奥运0829训练场大跨度滑行索网结构施工技术 刘航,吴文奇,李晨光1,尹华钢2,李志强2 (1.北京市建工程研完院,北京100039:2.总装部工程设究总院,北京100028) [要]奥运0829训练为第29居奥运会开闭蓉式演的训练场地,原型尺寸强拟国家体育场屋盖结构的开口 部分,其中所采用的高空滑行索网的设计皮安梨施工为读工程的难点.清行网的最大跨度超过10m 采用高 强裤丝绳,既承了训值表演中“滑景”的作用,同时也起到了穆定主体钢结构的作用.介溶了请滑行素网结 构的现场安装工技术. [关键词]素网结构:滑行素网:施工:有限元分析 [中分类导]TU323.8 [文献核识移]A [支章编号]1002-8498(2010)10-0040-04 Construction Technology of Long-span Zipline Cable-net Structure of the 0829 Training Ground for the Olympic Games Liu Hang' Wu Wenqi' Li Chenguang' Yin Huagang? Li Zhiqiang (1.Beijing Building Construction Research Institute Beijing 100039 China: 2.Engineering R D Institute of the General Arming Ministry Beijing 100028 China) Abstract:The 0829 training ground is one of the rehearsals ground for the opening and closing ceremony of the 29th Olympic Games which is built by prototype to simulate the uncovered part of the roof structure of the National Stadium.The design and construction of the zipline cable-net structure used in the training ground are the difficulties of the project.The span of the zipline cable-net structure exeeeds 180m and high strength galvanized steel ropes are used to realize the function of zipline during the training program as well as to stabilize the steel structure.In this paper the construction techniques of the zipline cable-net structure are introduced. Key words:cable-net structure:zipline cable-net:construction:finite element analysis 1工程概况 置标高为30m.上述拉素的最大跨度超过180m 采用 为筹备2008年北京...
2016年7月下 施工技术 第45卷第14期 CONSTRUCTION TECHNOLOGY 113 D0I:10.7672/8js2016140113 奥林匹克体育中心游泳馆大跨度单层拱壳钢 结构屋盖施工技术 施元强,蒋国平,李洪祥,贾尚瑞 (浙江精工钢结构集团有限公司,浙江绍兴312030) [摘要]河北奥林匹克体育中心游泳馆钢屋盖为独立的大跨度单层拱壳结构,内部桁架、钢拱构件截面大、跨度长、 质量大.另外,屋盖下方混凝土结构造型复杂、覆盖范围广,大型起重机无法在场内施工.所以,在保证下方混凝 土结构不被破坏的前提下,选择合理的施工方案是确保工程如期、高质完成的关键所在.主要对游泳馆屋盖钢结 构的施工方案和施工措施进行介绍和说明. [关键词]钢结构;拱壳;屋盖;有限元分析;监测;施工技术 [中图分类号]TU393.3 [文献标识码]A [文章编号]1002-8498(2016)14-0113-04 Construction Technology of Large-span and Single-layer Arch Shell Roof Steel in Natatorium of the Olympic Sports Center Shi Yuanqiang Jiang Guoping Li Hongxiang Jia Shangrui (Zhejiang Jinggong Steel Structure Group Co.Ld.Shaoxing Zhejiang 312030 China) Abstract:The natatorium steel roof of Hebei Olympic Sports Center is a large-span and single-layer arch shell steel structures.The inner truss and steel arch structures have big sections long spans and heavy weights.In addition the concrete structure under the steel cover is very plicate and wide-range which can not be constructed by large-sized cranes within the site.As a result under the condition of ensuring the underside concrete structures to be not destroyed a reasonable construction scheme to be chosen is critical to guarantee the construction schedule and quality.The paper mainly introduces and describes the construction scheme and construction measurements for the natatorium roof shell steel structures. Key words:steel structures;arch shell;roofs;finite element analysis;monitoring;construction 1工程概况 脚固定于2层楼面混凝土柱顶.拱壳结...