[关键词】地下工程;隧道;顶管;变形;有限差分法 [中图分类号】U458.1 [文献标识码]A [文章编号]1002-8498(2017)01-0089-05 Study ofInfluence ofPipe-jackingConstruction onEnvironment Liu Hangjun, Cao Zhensheng,Liu Zongzhi, Che Jianguo (Power China Roadbridge Group Co.,Ltd.,Beijing 100048,China) AbstractSurface deformation,soildisplacement,pore waterpressure and soil stress in consideration of fluid-structure interaction are studied during pipe-jacking construction by finite diffrence method.The results show that in pipe-jacking construction surface displacement along the axis of pipe-jacking reached the maximum when the pipe is ahead about 1D ( D is pipe diameter,3. 8m) and became small when the pipe is away. The surface along the vertical axis of pipe-jacking is greatly influenced on both sides of the 3D of the axis.Soil pore water pressure increased at first and then decreased, and reached the maximum when the pipe is 2D away from the calculated section. Influence of principal stress at pipe-jacking axis is largest in the same horizontal plane and the scope of influence is about 2D.Finally, the numerical results is pared with the theoretical value, the results are basically identical. Key words:underground; tunnels;pipe jacking; deformation; finite difrence method 0引言 数优化,以减小曲线顶管施工对土体的扰动。
施工技术 2012年6月上 102 CONSTRUCTION TECHNOLOGY 第41卷第366期 防腐砂浆的防腐性能研究 张新庆,李光球2,薛亮亮2,王惠明2 (1.苏州市吴中区建设工程质量监督站,江苏苏州215128;2.苏州市站苏新型建材有限公司,江苏苏州215132) 【摘要]针对建筑物表面混凝土剥落、碳化和钢筋锈蚀,从而严重影响混凝土建筑物的寿命和外观,甚至危及混凝 土建筑物正常使用和安全的问题,开发了一种高强度防水防腐砂浆.首先,详细介绍了该种高强度防水防腐砂浆 的性能,包括原材料组成和性能指标:其次,介绍了防腐砂浆的背腐试验情况,包括静期对防腐性能的影响,以及浸 泡时间对防腐性能的影响. 【关键词]砂浆:防腐砂浆;龄期;浸泡时间;试验;防腐性能 [中图分类号]TU578.1 [文献标识码]A[文章编号】1002-8498(2012)11-0102-03 Study on Anticorrosion Performance of Anticorrosive Mortar Zhang Xinqing' Li Guangqiu?.Xue Liangliang Wang Huiming' (1.Suthou Wuzhong Wuzhong District Construction Project Qualisy Supervision Station Suahou Jiangsu 215128 China: 2.Suzhou Gusu new Building Materials Co.Lad.Surhou Jiangsu 215132 China) Abstract:Based on concrete spalling carbonization and steel corrosion of building surface which seriously affect service life and appearance of concrete structures and even endanger normal use and safety of concrete structures a kind of high strength waterproof and anticorrosive mortar is developed. Firstly the authors introduce performance of the kind of high strength waterproof and anticorrosive mortar including material position and performance index in detail;secondly the authors introduce anticorrosive experiments of anticorrosive mortar including age effect on anticorrosion performance and soaking time effect on anticorrosion performance. Key words:mortar anticorrosive mortar;age;immersion time;testing;anticorrosion performance 近年来,建筑表面混凝土剥落、碳化和钢筋锈表面涂覆防腐涂料.但该种方法工程造价较高,工 蚀的问题日益引起人们的注意,特别...
2012年9月下 施工技术 第41卷第373期 CONSTRUCTION TECHNOLOGY 1 钢板剪力墙结构设计与施工模拟技术 范重,刘学林,黄彦军,李丽,曹禾 (中国建筑设计研究院,北京100044) [摘要]钢板剪力墙延性好、耗能能力强,是一种新型的高层抗侧力结构体系.钢板剪力墙主要承受水平剪力,不 承担竖向压力,需要进行后装连接设计,内嵌墙板与连接板可以采用栓接或焊接.钢板剪力墙的薄弱部位出现在 角部,设计中需要采用合理的构造措施避免钢板剪力墙的角部应力集中.钢板剪力墙与现浇混凝土楼板的连接 构造需要满足内嵌钢板的后安装要求,同时也不影响现浇混凝土楼板的正常施工.利用不同形式的加劲肋可以延 缓内嵌钢板的屈曲,提高钢板剪力墙的极限承载力和延性.对加劲肋的效能进行了分析对比,并结合钢板剪力墙 的实际工程进行了不同施工方案的施工模拟,分析了钢管混凝土浇筑时间对钢板剪力墙内力和变形的影响,得到 了合理的施工安装顺序. [关键词]高层建筑;钢板剪力墙;后安装;连接构造;加劲肋;施工模拟 [中图分类号]TU38 [文献标识码]A [文章编号]1002-8498(2012)18-0001-08 The Structural Design of Steel Plate Shear Wall and Construction Simulation Technology Fan Zhong Liu Xuelin Huang Yanjun LiLi Cao He China Architecture Design Research Group Beijing 100044 China) Abstract:With good ductility and dissipation energy capability steel plate shear wall (SPSW)is an innovative lateral loading-resisting system.SPSW is suffered with horizontal shear force and do not bear vertical pressure.It needs afterloading connection design.Bolted connection and welded connection are used in the design of connection between infill plate and fish plate.Weak part of steel plate shear wall is easy to occur in the corner.Appropriate constructional measures must be taken to avoid stress concentration.Connection of SPSW and cast-in-place conerete floor is needed to meet the requirement of afterloading and does not hamper normal construction.Buckling of infill plate can be delayed by stiffener.Ultimate bearing capacity and ductility can be improved.This paper presents the p...
[关键词】钢结构;吊车梁;疲劳损伤;裂缝;加固;试验 【中图分类号】TU391.2 [文献标识码]A [文章编号]1002-8498(2013)14-0054-04 TheExperimentalStudyonMechanicalPropertiesof SteelCraneGirderBeforeandAfterReinforcement WenYang,Li Cong (The College of Civil Engineering,Inner Mongolia University of Science and Technology, Baotou,Inner Mongolia 014010,China) Abstract:This paper focuses on a cracking steel crane girder of one factory. On the basis of extensive investigation and research on the fatigue damage of cracking steel crane girder at home and abroad, in order to improve the effective area and stiffness of the upper area of the crane girder, a reinforcement program is put forward. Through 2 million times fatigue test of the crane girder before and after reinforcerment, this paper researched on the change rules of magnitude and direction about the crack tip principal stress before and after reinforcement. The results show that it can extend the fatigue remaining service life of fatigue cracking of the steel crane girder by increasing the effective cross section area and stiffness,and it is a good guide on reinforcement and maintenance of actual industrial plant cracking steel crane girder. 其能否正常运行,直接影响到工厂的安全生产。
2012年7月下 施工技术 第41卷第369期 CONSTRUCTION TECHNOLOGY 鄂尔多斯东胜体育中心体育场拉索施工技术研究 郭正兴,胡明坡2,罗斌 (1.末南大学土木工程学院,江苏南京210096;2.南京建筑设计研究院有限贵任公司,江苏南京210005) [摘要]鄂尔多斯东胜体育中心体育场采用钢拱斜拉网格结构体系,拉索数量多,相互影响较大.针对工程特点对 结构进行找力分析,得出每根拉索对应的等效预张力,并考虑施工过程中拉索长度的变化,确定合理的拉索原始长 度及调节量;采用基于改进遗传算法的优化理论确定拉索施工顺序,按此顺序对拉索施加相应的等效预张力,得出 每根拉索的施工张拉力. [关键词]体育场;钢结构;拉索;张拉;遗传算法;优化 【中图分类号]TU311;TU758 【文献标识码]A [文章编号]1002-8498(2012)14-0077-04 Study on Construction of Stadium Cable in Erdos Dongsheng Sports Center Guo Zhengxing' Hu Mingpo Luo Bin' (1.School of Cisil Engineering Southeast University Nanjing Jiangsu 210096 China; 2.Nanjing Architecture Design Research Institute Co.Lad.Nanjing Jiangsu 210005 China) Abstract:The stadium applies steel are stayed grid structure in Erdos Dongsheng Sports Center whose stayed cable can affect each other largely.According to engineering characteristics corresponding equivalent pre-tensioning force for each cable is gained by force-finding analysis and the change of cable length during construction is considered to assure reasonable original cable length and regulation.The construction sequence of cable is assured based on the optimizing theory of genetic algorithm.Equivalent pre-tensioning force is applied on cable to get tensioning force of each cable. Key words:stadiums;steel structures;cable;tensioning:genetic algorithm;optimization 1工程概况 桁架变形,对活动屋盖的顺利开闭提供了有利的保 鄂尔多斯东胜体育中心位于东胜区的铁西区,证.如图1所示. 总用地约493000m2.东胜体育场采用蒙古弓箭造 型,是目前国内结构最复杂、规模最大的开闭式体 育场.固定屋盖几何形态为球面,外径359.5m 沿 活动屋盖运行轨道方向布置主桁架,在与主桁架垂 直的方向布置次桁架,形成空间桁架体系;活动屋 4效果 b拉案 盖也采用桁架体系,可开启投影面积113.524m× 图1那尔多斯东胜体育中心 88.758m;巨拱采用四边形管桁架结构,最高点 Fig.1 Erdos Dongsheng Sports Center 129m 跨度320m 通过46根拉索与轨道桁架中部 连接;固定屋盖与巨拱形成整体受力体系,共同承2钢结构整体施工方案 担各种荷载效应,固定屋盖的一部分质量经钢索提 东胜体育场屋盖结构为超大型复杂空间结构, 拉传给巨拱,再传给巨拱脚基础,传力路径简单明构件内力很大,传力相互关联.不同施工方案对屋 确.巨拱、拉索、固定屋盖3部分形成有机整体,对 盖钢结构构件在重力荷载作用下的内力和位形将 拉索施加预应力可以分担部分竖向荷载、调节轨道 产生一定的影响. 结合设计院对该工程的施工建议和实际情况, [收稿日期]2012-07-09 确定如下钢结构整体施工方案,拉索施工穿插其 [作者简介]郭正兴,教授,博士生导师,E-msl:u0x195608@中:①搭设支撑胎架至固定钢屋盖位置,分区安装、 126.c0m 万方数据 78 施工技术 第41卷 固...
施工技术 2017年8月上 88 CONSTRUCTION TECHNOLOGY 第46卷第15期 D0I:10.7672/8js2017150088 粉胶比对SBS改性沥青胶浆力学性能的影响分析 牛永宏,唐德密 (中交一公局第五工程有限公司,北京100024) [摘要]为了研究不同粉胶比对SBS改性沥青胶浆力学性能的影响,选取针入度试验、低温弯曲试验、动态剪切流 变试验研究5种粉胶比下沥青胶浆的高温稳定性、低温抗裂性和抗车辙能力.研究表明:粉胶比的增大使针人度 减小、抗剪强度增大,但是其受温度影响较大,提高粉胶比可增大抗剪强度但低温时易开裂;温度为0℃时,沥青胶 浆的弯曲劲度模量受粉胶比影响较大,而温度为5℃时,沥青胶浆的蟠变变形受粉胶比的影响较大,因此在低温地 区铺筑沥青路面时应综合考虑粉胶比的作用;对于动态剪切流变试验,粉胶比的增加使沥青胶浆结构中弹性组分 增多、流动变形减小,提高了沥青胶浆的抗车辙能力. [关键词]沥青;SBS改性沥青;粉胶比;力学性能;试验研究 [中图分类号]TU535 [文献标识码]A[文章编号]1002-8498(2017)15-0088-05 Effect of Filler-bitumen Ratio on Mechanical Properties of SBS Modified Asphalt Mucilage NIU Yonghong TANG Demi (CCCC First Highicay Fifth Engineering Co.Lad.Beijing 100024 China) Abstract:In order to study the different filler-bitumen ratio on the mechanical behavior of SBS modified asphalt mucilage cone penetration test bending test at low temperature and dynamic shear rheological test were chosen to research the high temperature stability low temperature cracking resistance and rutting resistance of asphalt mucilage with five dosage of filler-bitumen ratio in the paper.The results show that:the increase of filler-bitumen ratio can reduce cone penetration and increase shear strength. However filler-bitumen ratio is obviously affected by temperature.Improving filler-bitumen ratio can increase shear strength but dehisce in the low temperature.When temperature is 0℃,the bending stiffness modulus of asphalt mucilage is influenced by the filler-bitumen ratio obviously.Meanwhile when temperatu...
[关键词]隧道;盾构;沉降;结构响应 [中图分类号】TU4;TU455.43【文献标识码]A[文章编号】1002-8498(2013)15-0106-03 Analysis onStructuralResponseofShield TunnelAfterSedimentLeakage Fang Delin (Tianjin Tanggu Trade Center Construction Project,Tianjin 300450, China) Abstract;The sediment leakage accident of Tianjin Metro Jinbin line lead to uneven settlement, secondary deformation and structural stress. Based on the elastic foundation theory, this paper modifies the Gauss settlement curve, gets the settlement curve of tunnel after this accident and the distribution of secondary structure force.Results show that the accident caused the biggest secondary moment is 6 000kNm, and the shear force is 1.4kN. The maximum forces located at vault of tunnel near Compared with scene investigation, structural response showed in settlement curve is reliable.Moreover the stability of stick steel reinforcement method is analyzed. Key words;tunnels; shields; settlement; structural response 软土中的盾构隧道,漏泥砂后会出现不均匀沉构的受力状态进行评估。
施工技术 2017年7月上 132 CONSTRUCTION TECHNOLOGY 第46卷第13期 D0I:10.7672/8js2017130132 盾构隧道施工对浅基础建筑物影响研究 申兴柱1,高锋2,王少鹏2,于清洋,王士民1 (1.西南交通大学交通隧道工程教育部重点实验室,四川成都610031; 2.中国水利水电第十一工程局有限公司,河南郑州450001) [摘要]结合深圳地铁7号线穿越4栋2层浅基础(2层烧结砖基础)建筑物,采用数值模拟的方法并与现场监测数 据相结合,研究盾构施工对浅基础建筑物的影响规律.通过分析盾构掘进对地表横纵向、建筑物关键观测点沉降 及建筑物基础应力的影响程度,并与现场监测结果进行对比,研究结果表明靠近隧道一侧建筑物地表沉降比远侧 沉降偏大;地层软硬程度对地表建筑物沉降影响较大,尤其是软硬地层交界面位于同一建筑物下方时,会造成建筑 物点沉降差异较大;数值模拟结果比监测数据偏大,在施工中可借鉴数值模拟结果对建筑物变形量进行预测是否 在可控范围内. [关键词]隧道:盾构;数值模拟;监测;变形 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2017)13-0132-06 Research on Influence of Shield Tunnel Construction on Buildings with Shallow Foundations SHEN Xingzhu' GAO Feng WANG Shaopeng YU Qingyang' WANG Shimin' (1.Key Laboratory of Transportation Tunnel Engineering Ministry of Education Southwest Jiaotong Unirersity Chengdu Sichuan 610031 China;2.Sinohydro Bureau 11 Co.Lid.Zhengzhou He'nan 450001 China) Abstract:Taking shield tunnel passing 4 buildings on two layers of clay brick foundation in Shenzhen Metro 7th Line Project for example its different settlement and variation of internal force due to the passage of a shield tunnel is investigated by using numerical simulation and field monitoring data.The results indicated that the surface settlement of buildings closing to the side of the shield tunnel is larger than that of the far side.The stratum has a great influence on the settlement of buildings especially the soft and hard strata located in the same building.The results of numerical simulation are larger than t...
施工技术 2016年7月上 114 CONSTRUCTION TECHNOLOGY 第45卷第13期 D01:10.7672/sgjs2016130114 盾构隧道施工中管片上浮力学时变特性研究* 徐俊,柳献2 (1.上海建工集团股份有限公司,上海200080;2.同济大学土木工程学院,上海200092) [摘要]管片脱离盾尾后在注浆液作用下上浮将影响工程施工质量.鉴于此,采用复配技术对单液型可硬性浆液 进行制备,对管片上浮模拟试验方案进行了设计,对摩擦力/摩擦系数及浮力的计算公式进行了推导,最后对管片 的受力情况及其时变特性进行了研究.结果表明:摩擦力/摩擦系数在试验初期(0~6)基本呈线性增长趋势,随 后(6~14.5)呈阶梯形增长趋势,最后趋于稳定;浮力随时间的推移呈线性下降趋势,待浆液完全凝固时,浮力 消失. [关键词]隧道工程:盾构;注浆液:模拟试验;摩擦系数;浮力 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2016)13-0114-04 Research for the Mechanics Time-varying Characteristics of Segment Upward Movement of Shield Tunnel During Construction Xu Jun' Liu Xian2 (1.Shanghai Construction Group Co.Lid.Shanghai 200080 China; 2.College of Ciril Engineering Tongji University Shanghai 200092 China) Abstract:Segment floats upward under the effect of grouting slurry during shield tunnel construction and thus affects the project quality.Based on this grouting slurry is prepared by adding mineral admixture and supplementary gelled materials segment upward movement simulation test is designed frictional force/friction coefficient and buoyancy calculation formula are also established and finally the mechanics time-varying characteristics of segment upward movement is studied.The results confirm that friction coefficient/frictional force between grouting slurry and segment shows the linear trend at first (0~6h) then ladder type growth (6~14.5h) and flatten out in the end.The buoyancy is decreasing over time when grouting slurry curdled pletely it es to zero. Key w...
2014年7月上 施工技术 第43卷第13期 CONSTRUCTION TECHNOLOGY 111 D01:10.7672/sgj92014130111 盾构近间距穿越对既有隧道的影响参数研究 朱蕾 (同济大学地下建筑与工程系,上海200092) 【摘要]软土地区盾构近距离穿越既有隧道的工程近年来不断增加.针对新老隧道间距和穿越角度这两个影响参 数对既有隧道的变形进行研究分析,采用三维有限差分软件进行数值模拟.两种方法的结果进行对比验证后,归 纳这两个参数对既有隧道垂直位移变化的规律. [关键词]隧道工程;盾构;软土;穿越;间距;角度 [中图分类号]U455.43 [文献标识码]A[文章编号]1002-8498(2014)13-0111-03 Research on the Parameters Influence on the Existing Tunnel During Nearby Shield-driven Construction Zhu Lei Department of Geotechnical Engineering Tongji University Shanghai 200092 China) Abstract:Recently more and more tunnels need to cross above or beneath the existing metro line in soft soil.To evaluate the influence of such construction on the existing tunnel two parameters were studied in this article based on monitoring data.They were the vertical interval between the two tunnels and the projection angel.The numerical simulation by three-dimensional finite difference software was also used to pared the results from the two design parameters.The displacement rules of the existing tunnel were concluded. Key words:tunnels;shields;soft soil;crossing;interval;angle 0引言 程实例的监测数据分析和数值模拟两种方法对间 上海轨道交通经过20年的工程建设,盾构掘进 距和角度这2个影响参数进行研究. 已完成了40余处穿越已运营隧道的施工.随着新 1实测数据对比分析 一轮建设,预计还会发生多处同类工程.依据新建 实测数据基于穿越工程实例中既有隧道纵向结 隧道与既有隧道的相对位置来分类,穿越类型有下 构的垂直位移(隆起或沉降)监测结果,将2个参数进 穿、上穿、重叠、并行、上下穿等,其中以下穿工程为 行分组对比(同组数据中另一分析参数基本一致), 主,施工机械以采用中6340土压平衡盾构为主.施 忽略土压力、注浆等施工参数对既有隧道的变形影 工盾构与既有隧道垂直净间距多数<0.5D(D为隧 响.测量数据取刀盘第一次切人到隧道投影线(穿越 道直径,主要为6200mm) 新建和既有隧道基本位 前)、盾尾脱出隧道投影线(穿越后)两个时间点为 于第④层和第...
2017年6月下 施工技术 第46卷第12期 CONSTRUCTION TECHNOLOGY 67 D0I:10.7672/8js2017120067 盾构管片力学性能试验平台研究 韩兵 (中国铁建大桥工程局集团有限公司,天津300300) [摘要]针对盾构斜井管片力学性能试验的需要,设计制作了集加载系统、数据采集系统于一体的整环管片力学性 能试验平台.该试验平台利用张拉钢绞线对管片施加环箍力模拟水压力,利用贝雷架和液压千斤顶施加集中荷载 模拟土压力,利用数据采集系统测量管片加载过程中的受力和变形情况.通过现场测试,验证了该试验平台的有 效性. [关键词]地下工程;隧道;盾构;管片;力学性能;试验平台 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2017)12-0067-04 Design of Experimental Platform for Mechanical Properties of Shield Segment HAN Bing China Railway Construction Bridge Engineering Bureau Group Co.Lid.Tianjin 300300 China) Abstract:In order to test the mechanical properties of segment in the shield slant a experimental platform which has a loading system and a data acquisition system was designed.In the experimental platform the tension force is applied to the segments to simulate the water pressure and the concentrated load is simulated by the Bailey frame and the hydraulic jack.The foree and deformation of the segments during loading were measured using the data acquisition system.The validity of the experimental platform is verified by experiments. Key words:underground engineering;tunnels;shields;segment;mechanical property;test platform 0引言 拟水压力,在管片结构上方布置44个垂直千斤顶模 管片作为盾构斜井衬砌体系的受力主体,除承 拟纵向轴力[4.西南交通大学何川教授在管片原 受结构周围的水、土压力,还要承受盾构推进时千 型试验方面做了大量研究[5-,研制出“多功能盾构 斤顶的推力和施工中的其他荷载,对其力学性能有 隧道结构体原型组合加载试验系统”,其加载方式 较高的要求[1. 是分开考虑水压和土压对管片的影响,通过环箍梁 国内外针对管片衬砌结构的力学特性开展了 向管片导入轴力模拟水压,通过对拉钢绞线对管片 大量的研究工作,常见的研究方法包括理论分析、 施加径向压力导入弯矩模拟土压.此套加载装置 数值模拟计算、相似模型试验及结构原型试验 对武汉长江隧道、南京长江隧道、狮子洋隧道所使 等2.其中...
施工技术 2016年11月上 116 CONSTRUCTION TECHNOLOGY 第45卷第21期 D0I:10.7672/5gj52016210116 盾构施工煤矿斜井超前地质预报技术分析 及其工程应用* 夏明锬 (中铁十一局集团有限公司,湖北武汉430061) [摘要]采用超前地质预报技术对煤矿斜井工作面前方不良地质进行预测是保障施工安全、优质和高效必不可少 的工作.通过对比常见的4种超前地质预报的方法特点,结合采用盾构施工煤矿斜井过程中电磁环境复杂、工作 面后方空间受限的施工条件,确定采用超前钻探作为斜井施工过程中的超前地质预报方法.同时,在国内首条采 用盾构施工的煤矿斜井一—神东补连塔煤矿斜井中进行了现场验证,并将预报结果与地勘资料、后期盾构出渣情 况进行了对比.验证结果表明,超前钻探地质预报方法具有准确性和直观性,适合应用于采用盾构施工的煤矿斜 井建设. [关键词]隧道工程:煤矿;斜井;盾构;超前地质预报:工程应用 [中图分类号]U45 [文献标识码]A [文章编号]1002-8498(2016)21-0116-04 Analysis of Advanced Geology Forecast in Colliery Inclined Shaft Tunnel by Shield Construction and Its Engineering Application Xia Mingtan (China Railway 11th Bureau Group Co.Ltd.Wuhan Hubei 430061 China) Abstract:Advanced geology forecast for unfavorable geology beyond coal slope tunnel working face is a necessary work to make tunnel construction safe high quality and efficient.In this paper four advanced geology forecast methods are pared.In consideration of the plex electromagnetism environment and the limited space after shield forward boring method is used to forecast the advanced geology. Meanwhile forward boring method is applied in the first colliery inclined shaft tunnel by shield- Shendong Bulianta colliery.Furthermore the forecast result is pared with the engineering geology database and shield residue.The results show that forward drilling method is an accuraey and intuitive method and it is suitable for colliery inclined shaft tunnel construction by shield. Key words:tunnels;colliery;inclin...
2015年4月上 施工技术 第44卷第7期 CONSTRUCTION TECHNOLOGY 105 D0I:10.7672/5j52015070105 盾构掘进诱发振动对框架结构影响研究* 郭飞1,苏艺2,陶连金,黄俊3 (1.北京工业大学建筑工程学院,北京100124;2.广州市地下轨道总公司,广东广州510380; 3.中建三局人防与地下空间设计院,湖北武汉430071) [摘要]以北京西部地区浅埋砂卵石盾构施工产生的振动对周边建(构)筑物的影响为背景,借助ABAQUS有限元 软件,计算各楼层动力响应,分析各楼层振动时域与频域特点,对地表环境影响进行分析,结果表明:由于盾构掘进 振动频带较宽,且以中高频为主,振动波通过结构物基础向上传播过程中,由于与结构一阶、二阶振型频率差异,使 振动峰值和频率不断衰减,其中水平向衰减较为明显.振级变化规律并不明显.随着结构物层数增加,水平向和竖 直向呈增加趋势. [关键词]地铁:盾构;砂卵石地层;振动 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2015)07-0105-05 Shield Tunneling Induced Vibration on Frame Structure Impact Study Guo Fei' Su Yi2 Tao Lianjin' Huang Jun (1.College of Architecture and Ciril Engineering Beijing University of Technology Beijing 100124 China; 2.Guangzhou Underground Rail Head Guangzhou Guangdong 510380 China; 3.CCTEB Ciril Defense and Underground Space Institute Wuhan Hubei 430071 China) Abstract:Shallow sandy pebble in west Beijing area of shield construction vibrations caused by the engineering background of a nuisance and the interference problem based on field measured to obtain input of vibration wave in the areas residents plaints seriously with the aid of the finite element software ABAQUS floors dynamic response calculation analysis of the vibration characteristics of time domain and frequency domain the floors environmental impact analysis on the surface.Results show that the vibration due to shield tunneling wide frequency band and mainly in high frequency vibration wave propagation through structure foundation up due to ...
2016年10月上 施工技术 第45卷第19期 CONSTRUCTION TECHNOLOGY 91 D0I:10.7672/5j52016190091 盾构始发施工风险分析及控制技术研究* 王国富2,王建,路林海2,王渭明1 (1.山东科技大学土木工程与建筑学院,山东青岛266590;2.济南轨道交通集团有限公司,山东济南250101) [摘要]以济南轨道交通R1线王府庄站盾构始发为工程背景,结合工程地质条件,统计分析以往工程实例,归纳总 结出盾构始发诱发安全事故的28个风险因素.采用专家调查法对风险清单进行对比分析,运用模糊层次分析法 定量计算得到各层次风险权重,研究表明土体改良较差、洞口密封不当、盾构始发参数调节不当等因素是诱发盾构 始发安全的关键问题.针对风险较大的环节提出相应的风险规避措施,为同类工程的风险辨识及防控技术提供了 科学指导和参考经验. [关键词]隧道工程:盾构;始发;风险分析:风险控制 [中图分类号]U455.43 [文献标识码]A [文章编号]1002-8498(2016)19-0091-05 Risk Analysis and Control Research of the Subway Shield Originating Construction Wang Guofu.2 Wang Jian' Lu Linhai2 Wang Weiming' (1.College of Architecture and Ciril Engineering Shandong Unicersity of Science and Technology Qingdao Shandong 266590 China;2.Ji'nan Rail Transit Group Co.Ld.Ji'nan Shandong 250101 China) Abstract:Taking Ji'nan Rail Transit Line RI Wangfuzhuang station shield tunnel originating as engineering background bined with the engineering geological investigation report the reference of previous engineering experience this paper sums up the 28 risk factors of shield originating cause accident.Using expert investigation method to parative analysis of risk factors the fuzzy analytic hierarchy quantitatively calculated risk weighting at every level poor soil improvement the hole sealing shield originating parameter adjustment were some problems.For more risk link it puts forward the corresponding measures to avoid risks which provide scientific guidance for the construction of the safety and r...
[关键词】隧道工程;盾构;沉降;数值模拟;监测 [中图分类号】TU94+1[文献标识码]A[文章编号]1002-8498(2017)01-0074-06 Researchon theSubsidence CausedbyShieldTunnelSide-crossing Different Forms ofFoundationBuildings Huang Changfu'², Tian Shuguang',Wang Yanhui',Zhou Mingxiang² (1.Schoolof Ciiland Environmental Engineering,Unitersity ofScience and Technology Beijing,Bejing100083,China; 2. China Railway 16th Bureau Group Co.,Lud.,Beijing 100018,China; 3.Sehool of Traffc and Transportation,Bejing Jiaotong University,Beijing 100044,China) Abstract;In the background of Beijing-Tianjin inter-city extension line which from Tianjin to Yujiapu, adopts the method of bining numerical simulation and monitoring,studies the ground setlement and buildings differential settlement caused by new shield tunnel crossing adjacent different forms of foundation, analyzes the setlement variation of three stages which before shield reach the building, through the building and leave the building, then simulates the ground settlement and buildings differential setlement change before and after the reinforcement, the results show that the building settlement near the tunnel is obvious,the settlement that the shield crossing the building is the greatest, and the total settlement and buildings differential setlement that the shield side-crossing shallow foundation building is greater than side-crossing the deep foundation building,and grouting can greatly reduce the ground settlement and differential settlement. From the numerical simulation ...
2014年9月上 施工技术 第43卷第17期 CONSTRUCTION TECHNOLOGY 43 D0I:10.7672/sjs2014170043 电子雷管起爆错相减震试验研究 刘丽霞1,蒋玉波2,李进进1 2 (1.济南城建集团有限公司,山东济南250031;2.中国矿业大学力学与建筑工程学院,江苏徐州221116) [摘要]在雷管起爆错相减震原理的基础上,进行毫秒延期雷管和电子雷管起爆试验.通过对远近场地爆破引起 的振动监测,在距爆源>50m的位置,其衰减规律符合萨道夫斯基公式.电子雷管的错相减震效果明显,其震动明 显低于普通毫秒延期雷管,且在爆区中心30m以外的振速不足2.5cm/s 可有效避免爆破地震造成的危害. [关键词]电子雷管:错相;减震;试验;监测 [中图分类号]TU751.9;TD235.33 [文献标识码]A [文章编号]1002-8498(2014)17-0043-03 Experimental Study on the Shock Absorption by Phase Dislocation Using Electron-delay Detonator Liu Lixia' Jiang Yubo2 Li Jinjin'.2 (1.Ji'nan Urban Construction Group Ji'nan Shandong 250031 China;2.School of Mechanics Ciuil Engineering China Unirersity of Mining and Technology Xuzhou Jiangsu 221116 China) Abstract:The detonating experiment about millisecond delay detonator and electron-delay detonator was carried out on the basis of the principle of shock absorption by phase dislocation.Through the blasting vibration monitoring about the near and far field the attenuation rule of blasting shock accords with the Sadov's formula when the length is more than 50m from the explosion center.The decrease of shake is obvious by using electron-delay detonator.It is significantly lower than the mon millisecond delay detonator and the vibration velocity is less than 2.5em/s 30 meters outside of the explosion center which can effectively avoid the damage of blasting earthquake. Key words:electron-delay detonators;phase dislocation shock absorption;testing;monitoring 0引言 体通低滤高的特性,高频爆炸波衰减很快,...
2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY 39 D0I:10.7672/5js2015040039 方木柱维修加固方法试验研究 刘琼,许清风,张富文,贡春成,陈溪 (上海市工程结构安全重点实验室,上海市建筑科学研究院(集团)有限公司,上海200032) [摘要]木柱加固方法多种多样,近些年以纤维布复合材料加固较为普遍,但是破坏木结构的形貌,而且难以拆卸. 笔者开发一种可逆的木柱加固方法,拟采用螺丝连接钢板或对穿螺栓连接钢板的方法加固方木柱,也设计了采用 粘贴钢板的方法,以对比几种不同的加固方法的效果.通过对比加固前后的方木柱试件的抗压性能可以看出,螺 丝连接钢板和对穿螺栓连接钢板加周木柱的方法未能明显提高木柱的承载力;模拟局部腐朽后采用同质顺纹木块 螺丝连接钢板应急维修的研究表明,在螺丝间距有保证时该方法可迅速恢复方木柱的承载能力和变形能力;粘贴 角钢并焊接缀条的方法能明显提高木柱的承载力和变形能力. [关键词]木柱:加固;螺丝;对穿螺栓;钢板 [中图分类号]TU746.3 [文献标识码]A [文章编号]1002-8498(2015)04-0039-06 Experimental Study on the Strengthening Methods for Square Wood Column Liu Qiong Xu Qingfeng Zhang Fuwen Gong Chuncheng Chen Xi (Shanghai Key Laboratory of Engineering Structure Safety Shanghai Research Institute of Building Sciences Group)Co.Lid.Shanghai 200032 China) Abstract:Among the variety of strengthening methods FRP is a mon method in recent years. However FRP is different in appearance with wood and is difficult to tear off so that it hazards the morphology of wood structure.In this paper a reversible method is suggested to strengthen the square wood column which is screw fixing steel plate or penetration bolt fixing steel plate method.In addition pasting steel plate or angle steel on the side surface is also designed to strengthen the wood column.The strengthening effect is analyzed by paring them with the original samples.By paring the pressive characters of the strengthening samples and non-strengthening ones it cannot be found that the strength is en...
[关键词]桩基础;桩端注浆;评价;敏感性分析;改进 【中图分类号】TU473.1 【文献标识码】A [文章编号]1002-8498(2015)10-0127-04 ApplicationofImprovedSensitivityAnalysisin Evaluation ofPile-end Grouting Xu Song,Xu Xuelian, Shao Quan,Xu Jun (Faculty ofEngineering,China University of Geosciences,Wuhan,Hubei 430074,China) Abstract:Aiming at the disadvantages of conventional sensitivity analysis in evaluation of pile-end grouting,eight factors which arebearing capability,pile length,pile diameter,aspect ratio,routing volume,grouting pressure,water-cement ratio andnumber of grout tubes,are optimized by cluster and principal ponent analysis,and four new and independent prehensive factors that are grout-end soil,pile size,grouting pressure andnumber of grout tubes areobtained.Then,massmeasured data are analyzed respectively by using the original factors and the optimized factors. The results show that the sequences of sensitivity are grout-end soil,grouting pressure, number of grout tubes and pile size. Meanwhile,theimprovedmethod has greatly mproved the accuracy and simplicity. Key words:piles;pile-end grouting;evaluation;sensitivity analysis;improvement 在钻孔(冲孔)灌注桩中,桩端后注浆技术能有差异性,导致评价结果误差较大,与工程实践不 效弥补灌注桩的承载缺陷,大幅提高单桩极限承载相吻合。
施工技术 2011年10月下 62 CONSTRUCTION TECHNOLOGY 第40卷第351期 改进型轻型井点降水技术及其应用 张建平,陈璐,黎伟锋,王付祥 (惠州市水电建筑工程有限公司,广东惠州516001) [摘要]传统轻型井点降水存在造孔成井慢、大功率大流量水泵无法适应、排水效果不理想、造井材料不能重复利 用、对原有水环境影响大等缺点.在传统轻型井点降水方法的基础上进行改性创新,采用小型化、轻型化设备和材 料,且可周转使用,处理后基坑内无渗流和明水,边坡稳定,降水影响范围也显著减小,保证了周边建筑的安全.与 传统轻型井点降水和拉森IV钢板桩支护相比,有良好的经济效益. [关键词]地下工程;降水;轻型井点 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2011)20-0062-03 Application of Dewatering Technology with Improved Light Well Points Zhang Jianping Chen Lu Li Weifeng Wang Fuxiang Huizhou Hydroelectric Construction Engineering Co.Ltd.Huizhou Guangdong 516001 China) Abstract:The dewatering technology of traditional light well points has some defects in hole and well forming pumps dewatering effect materials and large influence to environment.Based on the traditional light well points dewatering improved light well points are adopted.The improved dewatering technology adopts small and light equipments and materials and the materials can be reused.The foundation excavation has no seepage and water after treated with improved dewatering technology and the slop is safe.Moreover the influence range of dewatering is significantly reduced.Comparing with traditional light well points and IV steel-plate Larsen piles the improved light well points dewatering technology has better economical benefits. Key words:underground;dewatering;light well points 传统的轻型井点降水技术存在很多技术、经济1改进型轻型井点降水方法 方面的弊端:①造孔成井慢,主要是传统的管井成孔 改进型轻型井点降水是在传统的轻型井点降水 直径较大,在造孔成井时要用冲击钻或回转钻机,灵 方法的基础上进行改进创新,其创新点如下. 活性差,井壁构造较复杂,造价高,...