[关键调】钢结构:波浪腹板:构件;门式刚架;钢框架 [中图分类号】TU758.16【文献标识码】A[文章编号]1002-8498(2012)14-0020-06 DesignPrinciple and Application of Components withSinusoidalCorrugatedWeb Guo Yanlin, Liu Feng, Lan Tao, Jiang Ziqin, Chen Hang (Deparment of Cisit Engineering,Tsinghua Unisesity,Bejing100084,China) Abstract:Sinusoidal corrugated web member is'a new kind of strueture of flange and sinusoidal corrugated web connected with high frequency continuous welding. This structure is suitable for beam and column ponents in portal frame light-weight building, crane beam, main and secondary beam in multi-story steel frame, and so on.Taking three examples from practical engineering struetures, this ed sq ou p rd up d story steel frame and large span steel structure with sinusoidal corrugated web members, especially in details. Key words;steel structures; sinusoidal corrugated web;ponents;portal frame;steel frame 1波浪腹板构件的应用范围及经济性能比较3)与平腹板比较,波浪腹板对翼缘提供了更好 波浪腹板工形构件是由上下翼缘板与波浪腹的支承作用、翼缘板的稳定性以及腹板的局部承压 板通过高频连续焊接而成的新型型材。
[关键词]水泥;炉渣;沸石;混合材料 [中图分类号】TU528[文献标识码]A[文章编号】1002-8498(2013)24-0071-04 ExperimentResearchon theCementAdmixturewithBoiling FurnaceCinderandZeolitePower MingYang',Chen Ping²,Yang Wen',WuXiong',ZhangKaifeng (1.China Construction Ready-mixed Concrete Co.,Ltd.,Wuhan,Hubei 430070,China; 2.Faculty of Material Science&Engineering,Guilin University of Technology,Guilin,Guangxi541004,China) Abstract:The boiling furnace cinder (BFC) and the zeolite power were used for cement admixture. The strength of cement,water demand,setting time and stability were studied when the BFC and the zeolite power were mixed into the cement alone or together. In addition, the mechanism was discussed by laser particle size analyzer,XRD and SEM.The results show that the PC 32.5 cement can be prepared when the 30% BFC and the 10%zeolite power were mixed for the substitute for cement.Because of affecting each other, the functions of mixed cement is better than the single-doped cement. Key words:cement;furnace cinder;zeolites; admixtures 沸腾炉渣微粉(以下简称沸渣粉,BFC)是由沸45μm筛余1.0%;③沸石粉粉磨至比表面积 腾炉燃料残渣经粉磨达到一定细度后制得的,是一530m²/kg,45μm筛余1.3%;④石膏脱硫石膏;5 种人工火山灰质材料",1t沸腾炉劣质燃料能产生砂ISO标准砂;6PI水泥熟料加5%石膏粉磨 0.6~0.8t残渣;沸石粉是天然沸石经粉磨后制至比表面积380m²/kg,80μm筛余7.6%。
施工技术 2014年11月上 102 CONSTRUCTION TECHNOLOGY 第43卷第21期 D01:10.7672/js2014210102 沉降区无砟轨道结构注浆抬升原理与工艺* 李杰,郑新国2,刘竞2 (1.沪杭客专股份有限贵任公司,上海200237;2.中国铁道科学研究院铁道建筑研究所,北京100081) [摘要]对沉降区无砟轨道结构高聚物注浆抬升工艺进行了系统的介绍,提出了高聚物注浆材料的性能要求、特点 及高聚物注浆抬升原理,分析了高聚物注浆的工艺特点,介绍了轨道结构注浆抬升施工工艺流程、关键操作要点及 施工后处理措施.实践证明,高聚物注浆技术是整治无砟轨道结构由于沉降引发的不平顺问题的快速、简易方法. [关键词]铁路工程;无砟轨道;注浆;抬升;施工技术 [中图分类号]TU744 [文献标识码]A [文章编号]1002-8498(2014)21-0102-03 Grouting Uplift Mechanism and Technology for Ballastless Track Structure in Settlement Zone Li Jie' Zheng Xinguo2 Liu Jing㎡ (1.Shanghai-Hangzhou Railway Passenger Dedicated Line Co.Ltd.Shanghai 200237 China; 2.China Academy of Railway Science Railway Engineering Research Institute Beijing 100081 China) Abstract:The high polymer grouting uplift technology for ballastless track structure in settlement zone has been systematically introduced.The performance requirements characteristies and theory of high polymer grouting uplift have been proposed.Meanwhile the construction process feature of high polymer grouting has been analyzed and construction technology of high polymer grouting uplift for ballastless track structure has been introduced.It proves that the high polymer grouting technology is an quickly and easy method for treating the settlement of ballastless track structure. Key words:railroad;ballastless track;grouting;uplift;construction 0引言 的主要问题之一,特别是对于软土路基.目前,对 无作轨道结构是我国高速铁路建设采用的主于沉降过大的区域,各国只能采取限速运营或停运 要结构形式,目前,我国无砟轨道结构线路总里程 整修的方式进行处理,这极大地影响了列车的正常 达10000km.相比于有砟轨道结构,无砟轨道结构 运营.这一问题...
施工技术 2017年7月下 58 CONSTRUCTION TECHNOLOGY 第46卷第14期 D01:10.7672/gjs2017140058 标准式圆管组合支撑体系制作及运用技术 冉旭勇,姚钊,汤伟,张守贵,熊洪锐 (中建钢构有限公司,四川成都620564) [摘要]根据遵义奥体中心项目成功的施工经验,介绍了一种标准式圆管组合支撑体系的制作以及运用技术,有效 解决了支撑系统与建筑本体碰撞的问题,以及提高支撑体系的稳定性及拆装的便利性. [关键词]体育馆;支撑体系:碰撞;制作;拆卸 [中图分类号]TU731.2 [文献标识码]A[文章编号]1002-8498(2017)14-0058-03 Manufacture and Application of Standard Circular Tube Composite Support System RAN Xuyong YAO Zhao TANG Wei ZHANG Shougui XIONG Hongrui China Construction Steel Structure Co.Ltd.Chengdu Sichuan 620564 China) Abstract:According to Zunyi Olympic Sports Center project successful construction experience the paper introduces a standard type pipe bination support system of production and the use of technology which effectively solve the supporting system and the impact of building ontology and improve the stability of the support system and convenience of dismantling. Key words:stadium;support system;collision;production;demolition 1工程概况 遵义奥体中心项目体育场钢结构整体投影为 “9”字形,在西侧看台分缝断开为主体和尾部2大 主要部分(见图1).钢结构用量约8000t.主体平 面投影为长250m、宽237m的开口椭圆形,最大悬 挑39.5m 钢结构空间形状不规则,结构高度为 45.268m.挑篷采用带平衡索的钢桁架-单层网壳 图1总体效果 结构,挑篷钢柱通过抗震球形钢支座支承于看台后 Fig.1 Overall effect 排混凝土柱顶.立面为单层网壳,最大倾角为45°, 46.276m 外凸12m 底部支撑于标高5.100m的平台上.尾 挑篷钢结构 部平面投影为狭长三角形,端部位于看台上的部分 立面钢结构 与主体类似,超出看台的部分为单层网壳通过树状 混凝土结构 支撑于标高为5.100m的平台上以及平台向主入口 过渡的台阶上.立面为单层网壳,底部支撑于标高 5.100m的平台上.体育场剖面如图2所示. 2支撑体系要求以及现有支撑体系缺陷 图2体育场剖面 2.1支撑体系要求 Fig.2 Profile of stadium 体育场立面钢结构施工过程中,立面钢结构和 菱形网格,菱形网格水平投影内净尺寸为1.3m× 挑篷钢结构连接部位的支撑体系需穿过立面钢结 1.3m 结构最高位46.000m 根据体育场钢结构施 构本体,立面...
【关键词]隧道工程;断层;围岩;稳定性;有限元分析;位移 [中图分类号】TU74;U459.2 [文献标识码]A[文章编号】1002-8498(2013)07-0093-04 FiniteElementAnalysison theInfluenceofFault tothe StabilityofSurroundingRock Li Wenhua',Li Hao',Gu Yincheng²,Zhang Yifan² (1.Jiangxi Highway Investment Group Co.,Ltd.,Nanchang,Jiangxi 330025,China; 2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092, China)、 Abstract;To understand the influence of the relative location of a fault to a tunnel and the inclination angle of the fault on the stability of the surrounding rock, using the Wufengshan Tunnel of Shiji Highway as an example, this paper performed finite element analysis to study stability of surrounding rock based on fault characteristic. The result shows that when the distance between the fault and the tunnel is less than twice of the tunnel diameter, the fault has significant influence to the stability of the surrounding rock. Also, the distribution and variation of deformation along the two sides of the surrounding rock are no longer symmetrical. The fault imposes maximum influence to the tunnel when the tunnel passes the fault. The influence reduces at the spandrel, and bees relatively small at the skewback. As the distance between the fault and tunnel decreases, the influence of the fault to the stability of surrounding rock increases.With the increase of inclination of the fault, vertical displacement of the surrounding rock at the hanging wall of the fault increases first and followed by decrease,while the vertical displacement at footwall shows opposite tendency. When the incli...
施工技术 2014年9月下 66 CONSTRUCTION TECHNOLOGY 第43卷第18期 D01:10.7672/sjs2014180066 改进GM(1 1)在高铁隧道沉降变形预测 中的对比应用* 周吕,文鸿雁2,胡纪元2,陈冠宇3,何美琳4 (1.桂林理工大学广西矿冶与环境科学实验中心,广西桂林541004;2.桂林理工大学测绘地理信息学院, 广西桂林541006:3,桂林理工大学广西空间信息与测绘重点实验室,广西桂林541006: 4.广西建设职业技术学院,广西南宁530003) [摘要]针对GM(1 1)模型在高铁隧道沉降变形分析与预测中精度不理想的情况,在GM(1 1)模型的基础上,建 立了自适应GM(1 1)模型与残差修正GM(1 1)模型,并讨论了2种改进模型的各自优点.依据某隧道沉降监测 数据,进行工程实例分析,得出自适应GM(1 1)模型与残差修正GM(1 1)模型在一定程度上均提高了原模型的预 测精度和预测曲线的相关性;残差修正GM(1 1)模型对于沉降曲线波动较大处仍有较好的拟合与预测效果,其预 测效果优于自适应GM(1 1)模型. [关键词]隧道工程;残差修正;变形预测;模型 [中图分类号]U455 [文献标识码]A [文章编号]1002-8498(2014)18-0066-03 Comparison and Application of Improved GM(1 1)in High-speed Railway Tunnel Settlement Deformation Prediction Zhou Lu' Wen Hongyan2 Hu Jiyuan2 Chen Guanyu He Meilin (1.Guangxi Scientific Experiment Center of Mining Metallurgy and Enrironment Guilin Unirersity of Technology Guilin Guangxi 541004 China;2.College of Surveying Mapping and Geoinformation Guilin University of Technology Guilin Guangxi 541006 China;3.Guangxi Key Laboratory for Spatial Information and Geomatics Guilin University of Technology Guilin Guangxi 541006 China; 4.Guangxi Polytechnic of Construction Nanning Guangxi 530003 China) Abstract:Because the situation of the precision of GM(1 1)in high-speed railway tunnel settlement deformation analysis and prediction is not ideal self-adaptive GM(1 1)model and residual error correction GM(1 1)model have established based on GM(1 1)model and their respective advantages are discussed.Engineering instance is anal...
施工技术 2011年3月上 76 CONSTRUCTION TECHNOLOGY 第40卷第336期 插销式钢管脚手架单元架受力性能研究 卢文良,白苹2,董万慧2 (1.北京交通大学土木建筑工程院,北京100044;2.北京城建设计研究总院,北京100037) [摘要]对插销式钢管脚手架的单元架进行了试验研究,试验中重点研究了斜杆布置方式对承载力的影响.采用 歌拉公式对单杆临界承载力进行计算,建立空间有限元模型,结合半刚性节点算法分析单元架的失稳模态和临界 荷载.将欧拉公式、有限元计算结果与试验结果进行对比分析,得出两种算法在运用于此类脚手架承载能力计算 中的适用性. [关键词]插销式钢管脚手架;极限承载力;欧拉公式;半刚性节点算法 [中图分类号]TU731.2 【文献标识码]A [文章编号]1002-8498(2011)05-0076-03 Research on Modular Frame Structure of the Plug-pin Steel Tube Scaffold Lu Wenliang' Bai Ping? Dong Wanhui2 (1.School of Civil Engineering.Beijing Jiaotong University Beijing 100044.China; 2.Beijing Urban Engineering Design and Research Institute Beijing 100037 China) Abstract:Four modular frames of plug-pin steel were tested.The experimental mechanic performance of scaffold frames is studied.Ultimate bearing capacity of the scaffold frames is calculated by Euler's formula.In addition FEM model was created bined with semi-rigid joint calculating method to analyze failure mode and ultimate bearing capacity of frames.Calculated results by finite element model and Euler's formula method are pared with test results and applicability of these two algorithms in calculation of bearing capacity is pointed out. Key words:plug-pin steel tube scaffold;ultimate bearing capacity:Euler's formula;semi-rigid joint calculating method 1单元架试验 1.1试验用单元架 0w00m1 本次试验中单元架的立杆、横杆均采用48.3 ×2.7Q345B钢管,斜杆采用38.3×2.7Q235B钢 80m 管.4组单元架分别编号为A~D 单元架A未布置 汇 2000 2000 2000 立面斜杆;单元架B的第1层布置立面斜杆,相邻 单元架A b单元架B C c单元果 面斜杆交于一点;单元架C的第1层布置立面斜 图...
[关键词]支撑;插口式模板支撑架;承载力;立杆;试验 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2015)23-0082-03 ExperimentalStudyontheBearingCapacityoftheUnitFrame inSocket-typeFormworkSupportSystem Tian Penggang',GuoYan²,ZhangFengliang',Hu Changming² (1.Shaanxi Institute ofArchitecture Science,Xi'an,Shaanxi710082,China; 2.Schoolof Civil Engineering,Xi'an University of Architecture and Technology,Xi'an,Shaanxi 710055,China) Abstract:This paper monitored the strain of the upright stanchion in the unit frame bearing process, measured the upright stanchion displacement after the unit frame instability,analyzed theinfluence of the upright stanchion distance and thejoint connection stiffness on the vertical ultimate bearing capacity,and obtained the instability mode of the unit frame.This paper points out that the upright stanchion distance is themain factor which effects thevertical bearing capacity of the unit frame,and theupright stanchion distance increases,the bearing capacity of the unit frame reduces obviously,while the influence of the joint connection stiffness on the vertical bearing capacity is dependent on the upright stanchion distance, theupright stanchion distance has great infuence on vertical bearing capacity. Key words:supports;socket-type formwork supports;bearing capacity;upright stanchion;testing 现阶段土建工程飞速发展,模板支撑体系作为 中[2"]。
[关键词】脚手架;模板;支撑;套扣式脚手架;施工技术 [中图分类号】TU731.2 [文献标识码]A [文章编号]1002-8498(2016)03-0016-03 ApplicationofFormworkSupportsofNestedSteelTubularScaffolds Zhong Wenshen,Li Minjian,Zhong Zhifeng (Guangzhou Firs Construction Engineerng Co., Ld., Guangzhou, Guangdong 510060,China) Abstract:Nested steel tubular scaffold as a new type of steel scaffold has the advantages as disassembly and assembly quickly and easily, safely and reliably and effctively.Taking Guangzhou Hongcheng Plaza prehensive renovation project as the background,nested steel tubular scaffolds applications on plex mercial plaza, the scaffolds design and installation of the details are introduced. Key words:scafflds;formwork;supports;nested steel tubular scaffold;construction 随着我国基础建设的蓬勃发展,钢管脚手架的 使用广泛且多样。
施工技术 2014年8月下 118 CONSTRUCTION TECHNOLOGY 第43卷第16期 D01:10.7672/js2014160118 房屋建筑渗漏防治应注意的几个问题 吴林兴,曹阳,王朝晖 (中国建筑第五工程局有限公司,湖南长沙410004) [摘要]分别针对工程中常见的地下室渗漏、屋面渗漏、外墙渗漏、厨房卫生间渗漏现象,归纳总结了其主要渗漏部 位与形式,分析了渗漏的原因,提出了防治渗漏的措施.并针对现行防水施工中的不规范做法,提出了改进各种防 水施工质量的建议. [关键词]房屋建筑:渗漏;防治;措施 [中图分类号]TU712.4 [文献标识码]A [文章编号]1002-8498(2014)16-0118-04 Several Subjects on the Preventing and Handling of the Leakage in the Building Wu Linxing Cao Yang Wang Zhaohui (China Construction Fifth Engineering Division Co.Ltd.Changsha Hu'nan 410004 China) Abstract:Based on the mon leakage phenomenon in basement roof outer wall kitchen and lavatory the leakage place and leakage pattern are concluded the leakage reasons are analysis and the handling measures are suggested.The unqualified waterproof working methods presently are discussed and some suggestions are therefore given to promote the waterproof construction quality. Key words:buildings;leakage;preventing;measures 房屋建筑渗漏问题十分普遍,主要表现在地下低,某些房地产开发商错误地认为地下室在地下水 室渗漏、屋面渗漏、外墙渗漏、厨房卫生间渗漏.房位以上,可以不设防水层或把设计的防水层取消 屋建筑渗漏严重影响了住户的使用,造成了很多社 了,造成渗漏隐患. 会矛盾:渗漏返修也造成了严重的损失.通过近50 2)防水层施工不合格地下防水完全靠防水 年的工程实践,现结合工程实际中出现的渗漏现象 层黏结形成全封闭防水系统整体防渗,防水层搭接 和成功的防治经验,对房屋建筑渗漏防治的综合技 部位黏结不牢固、不严密,使防水层没有形成完整 术进行探讨. 的防水体系,起不到防水作用. 1地下室渗漏及防治 3)防水混凝土施工不合格①振捣不密实、未 1.1渗漏部位 进行二次振捣,内部有蜂窝或缝隙,留下了渗漏通 地下室渗漏主要表现为地下室混凝土自防水 道;②混凝土养护不到位或根本没有养护,使其在 工程渗漏和卷材防水层或涂料防水层渗漏两个方 水化过程中,水化后的余水急剧大量蒸发,冲破了 面;渗漏部位主要集中于底板、墙面、顶板,其中渗 混凝土内部的毛细孔壁,使毛细孔连通形成了漏水 漏严重的较多出现在后浇带及底板四周的混凝土 通道,造成面漏. 吊模施工部位. 1.3防治措施 渗漏形式有点漏和面漏.点漏即在一个或几 1.3.1主要措施 个点上不断...
[关键词】房地产;工程建设;安全;系统平台 [中图分类号】TU714[文献标识码】A[文章编号】1002-8498(2013)24-0085-05 ResearchonSecurityTechnologyinRealEstateProject Zhang Fangfang,Zhang Yongcheng,Lin Xinggui, Li Xi (Schoolof CivilEngineering&Mechanics,HuazhongUniversity ofScience and Technology,Wuhan,Hubei 430074,China) Abstract:There are many security risks in real estate project process, so security technology as the real of project security. Through design and development project of security technology system at whole life cycle, authors carry out corresponding technical measures in design,bidding and construction phases of project safety security, and the security of construction projects at whole life cycle is achieved. Key words:real estate;engineering construction; security; system platform 近10年来,房地产行业获得了巨大的发展,已理,但是安全事故依然不断发生。
[关键词】房中房;隔声系统;隔振胶垫;ALC板 [中图分类号】TU242[文献标识码】A [文章编号]1002-8498(2015)22-0083-02 ApplicationofSoundInsulationSystemwithRoomin Room in aRecordRoom of the StudioBuilding ShengYangyang,WangZhiqiang (Zhongyifeng Construction Group Co.,Ltd.,Suzhou,Jiangsu 215000,China) Abstract:The 180 record room in the studio building in Suzhou Modern Media Square is designed as room in room with floating floor, 200mm-thick ALC board wall and 150mm-thick ALC roof. Combining with project practice, the room in room structure is designed and laid out reasonably to furthest cut off the influence of outer noise and vibration to the record room. Key words:room in room; sound isolation system;vibration isolation glue; autoclaved lightweight concrete board 1工程概况 其中浮筑地坪的施工是整个房中房施工的重点。
[关键词]地下工程;基坑工程;膨胀土;变形 [中图分类号]TU753[文献标识码】A【文章编号】1002-8498(2013)09-0041-04 Deformation Analysis on Some Expansive Soil FoundationExcavationin Chengdu Yue Dachang,Li Ming, Su Zijiang,Tan Jianzhong,Li Heng (Chengdu Sihai Rock and Soil Engineering Company, Chengdu,Sichuan 610041,China) Abstract;A foundation excavation project was located in an expansive soil area, and serious deformations were observed after excavation.Analysis to the deformations showed that they occurred because the construction was not performed according to construction organization and the understanding of the geological conditions was insufficient. Infiltration of the surface water and earthquake have also
conditions,design and construction.And measures were adopted to control the excavation deformations including improved deformation monitoring, step-by-step excavation and refiling. These measures were shown to be effective and their application ensured the construction quality and safety. Key words:underground; foundation excavation; expansive soil;deformation 0引言1工程地质概况 随着城市建设,成都东郊膨胀土地区出现大量某工程位于成都市东郊三环路外,地貌单元 深基坑工程,由于基坑支护设计和施工中对膨胀土属眠江Ⅱ级阶地。
2012年11月上 施工技术 41卷第376期 CONSTRUCTION TECHNOLOGY 105 成都来福士广场复杂节点玻璃天窗水池防水技术 贺飞,张兴志,马卫华 (中建二局建设工程股份有限公司成都分公司,四川成都610041) [摘要]成都来福士广场观感设计上要求达到光的通透性效果,裙房商业区屋面均为玻璃天窗水景水池,加上结构 设计复杂,对屋面防水施工提出了很高的要求.结合成都来福士广场工程实际,针对玻璃天窗水池、采光顶玻璃防 水及玻璃天窗节点防水具体要求,详细介绍了防水施工过程设计及施工要点,并对复杂节点玻璃天窗水池屋面防 水施工进行了总结. [关键词]防水工程;屋面工程;水池;施工技术 [中图分类号]TU761.11 [文献标识码]A [文章编号]1002-8498(2012)21-0105-03 Waterproof Technology for the Complicated Connections of Roof Skylight with Waterscape in Raffles City Chengdu He Fei Zhang Xingzhi Ma Weihua Chengdu Branch of China Construction Third Engineering Bureau Co. Lad.Chengdu Sichuan 610041 China) Abstract:Raffles City in Chengdu was required to have high light permeability.So the roof of the retail podium used skylight with waterscape.This design together with the plexity of structural design in this building imposed high requirement to the waterproof construction of the roof.Considering the detailed waterproof requirement for the waterscape the skylight and connections of the skylight the waterproof construction process and construction key points are introduced and the waterproof construction technologies for plicated connections of skylight with waterscape are summarized. Key words:waterproofing;roofs;ponding;construction 成都来福士广场位于成都市人民南路四段3号 (原四川省博物馆地块),总建筑面积约为31万m2. 中心裙房分别为1 2 3层结构,中心裙房屋面总面 3层巫峡水她 积约1万m2 中心裙房屋面分3层屋面,每层屋面 4层西陵 中心均为玻璃天窗水池,且与屋面景观、水景、幕墙 等多专业交叉(见图1).本工程中心裙房水池防水 层巫峡水袍 施工具有面积大、多专业协调、多节点类型等特点, 这对屋面工程节点深化设计、施工过程精细化管理 等提出较高要求. 结合本工程实际施工情况,将从玻璃天窗节点 图1中心裙房屋面示意 以...
[关键词]保温;屋面工程;废弃泡沫玻璃;应用 [中图分类号]TU551 [文献标识码】A [文章编号]1002-8498(2013)16-0064-04 ApplicationofDeposedFoamGlassinRoofInsulationProject Li Sen,Wang Yuejun (Gansu Third Construction Group Corporation,Lanzhou,Gansu 730030,China) Abstract;Based on parative performance analysis of aggregate processed from deposed foam glass and mon light aggregates,the construction technologies for energy-saving roof with the aggregate were put forward,including insulation structure,thermal parameters selection,construction process,quality standard and construction key points.The good result in demonstrating project application verified the feasibility of deposed foam glass used for roof energy-saving engineering,and the application meets the roof insulation requirement and fire safety. Key words:insulation;roofs; deposed foam glass;application 0引言 热点之一。
[关键词】预筑落成法;弹性顶托;微差下沉;同步施工 [中图分类号】TU7533[文献标识码】A【文章编号】1002-8498(2015)01-0003-04 Research on the High-rise Buildings with Basement that Pre-buildon theGroundand Gradual SaggingbyJacks Zhang Kun (Technology Center of China Construetion Third Engineering Bureau Co.,Lud., Wuhan,Hubei 430070,China) Abstract:This paper introduced a construction method of high-rise buildings with the basement,that was abbreviated as“pre-build subsidence”. The building was pleted in ground and gradual sagging by the jacks,made use of the building structure itself as foundation excavation supporting structure. The building was fixed on the engineering piles when sinks to the seting elevation. This method avoids the temporary support structure, and the synchronous construction on the ground and underground were achieved, the construction period is shorten. Key words:pre-build subsidence;elastic jacking; gradual sagging; synchronous construction 1研究背景托、微差下沉施工技术,简称“预筑落成法”。
[关键词]公路工程;浙青;布敦岩沥青;低温抗裂性能;试验; [中图分类号】U414【文献标识码】A[文章编号]1002-8498(2014)13-0141-04 ExperimentalResearch onLowTemperature Anti-cracking Performance ofBRAModifiedAsphaltMixtures (1.Xuchang Dacheng Construction (Group)Co.,Lad.,Xuchang,He’nan 461000,China; 2.Bejing Municipal Engineering Research Instiute,Bejing 100037,China: 3.Bejing Roads and Bridges Construction Group Co.,Ltd.,Beijing 100068, China; 4.Road Administration of Bejing MunicipalCommissionofTransport,Bejing100053,China; 5.Xiaoyi Municipal Bureau of Housing and Urban-Rural Deelopment,Xiaoyi,Shanxi 032300,China) Abstract;Bending test and freeze-off test were studied before and after aging the Buton rock asphalt (BRA) modified asphalt mixture with stand UV aging crack resistance at low temperature. The results show that UV aging former BRA modified asphalt mixture failure strain than asphalt mixes to improve 248μ,freeze-off temperature decreases 0.2°C. After UV aging BRA modified asphalt mixture than asphalt mixture at low temperature cracking resistance is better than the multivariate coupling matrix asphalt, the road performance slower decay rate. Meanwhile, bined with the test results, this paper presented cracking curve, and tried to establish a putational model of cracking of asphalt mixture. Key words:road construction; asphalt; Buton rock asphalt(BRA); low temperature anti-cracking performance;testing 0引言 点高、含氮量高、黏度大、抗氧化性和水敏感性强、 岩沥青是古代石油渗透在岩石夹缝中,经过长耐候性好、抗微生物腐蚀能力强、不含蜡、分子量 达亿万年的沉积、变化,在热、压力...
【关键词】隧道工程;支护;对称节理;离散元;锚杆 [中图分类号】U451*.2[文献标识码】A【文章编号】1002-8498(2017)01-0085-04 The Bolt-shotcrete Support Research of Rock Tunnel withSymmetricalJoint Yang Zhongfeng',Guo Jiping²”,Zhu Wenxuan* (1.Shanghai Tongyan Civil Engineering Technology Co.,Ltd., Shanghai 200092, China; 2.Guizhou Road & Bridge Group Co.,Lid.,Guiyang,Guizhou 550001,China; 3.Guizhou Duping Highway Co.,Ltd.,Guiyang,Guizhou 550001,China;4.Department of Geotechnical Engineering, College of Civil Engineering,Tongji University,Shanghai 200092,China) Abstract;A two-dimensional discrete clement model of tunnel is established, located in IV rock with symmetrical joint nearly.Thedisplacement of therock,thebolt axial force and the intemal forc of the concrete are researched under different support parameters, so that we can determine the reasonable support designing parameters.The results show that the lock pin bolt should be set when the steel grid is installed to reduce rock loose range and ensure tunnel safety, the supporting effect of the additional bolt systems, local bolt is not obvious when the foot bolt lock is set. It is remended that the original design change as ‘shotcrete + steel grid + bolt lock pin',the feasibility of the scheme is verified by the monitoring data from the field. Key words:tunnels; supports; symmetric joint; DEM; bolts 0引言伟力探讨了节理间距对隧道围岩压力的影响,分 随着国家高速公路的建设,需要穿越山岭的路析了不同节理间距下隧道围岩压力的分布规律。
2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY D0I:10.7672/5js2015040005 对我国建筑工业化现状的了解和建议 张希黔12,康明2,黄乐鹏2 (1.中国建筑工程总公司施工技术专业委员会,北京100037; 2.重庆大学土木工程学院现代施工技术研究中心,重庆400045) [摘要]以住宅产业化为例讨论建筑工业化的现状和发展建议.介绍了住宅产业化的概念和内涵,以及国内外住 宅产业化的发展及现状.通过我国住宅产业化的工程实践,全面介绍了住宅产业化的3种体系.建筑工业化在我 国取得了一定发展,但也有很多问题困扰着我们,需要政府做好顶层设计,行业做好统筹规划,各单位分工协作,共 同做好建筑工业化工作. [关键词]建筑工业化;住宅体系;预制装配式;现状;建议 [中图分类号]TU756.4 [文献标识码]A [文章编号]1002-8498(2015)04-0005-09 Present Situation and Advisement for Building Industrialization in China Zhang Xiqian.2 Kang Ming? Huang Lepeng? (1.Construction Technology Professional Committee China State Construction Engineering Corporation Beijing 100037 China;2.Modern Construction Technique Center College of Civil Engineering Chongqing Unicersity Chongqing 400045 China) Abstract:For the residential industrialization as an example the authors discuss present situation and development advisement of building industrialization introduce the concept and connotation and development present situation of residential industrialization at home and abroad.By residential industrialization practice of China the authors show three kinds of residence system.At present building industrialization has obtained new progress in China but some problems perplex us which need government doing well upper design building industry doing well overall planning to improve building industrialization level. Key words:building industrialization;residence system;precast;present situation;advisement 0引言 化将会对政府监管、企业运营模式、建筑结构组...
2011年4月上 施工技术 第40卷第338期 CONSTRUCTION TECHNOLOGY 71 富水砂层土压平衡盾构关键施工技术 徐岩,赵文2,黄龙光3,高照3 (1.沈阳建筑大学土水工程学院,辽宁沈阳110168;2.东北大学资源与土木工程学院,辽宁沈阳110819: 3.中铁四局集团第五工程有限公司,江西九江332000) [摘要]沈阳地铁二号线会展中心站一世纪广场站隧道盾构区间穿越中粗砂、砾砂层,砂性土层内摩擦角大,硫土 流动性差,排土困难,地下水量丰富、水压高,因此盾构缸进控制困难,容易造成地表沉降.从土压平衡盾构的适应 性、刀盘和螺旋输送机的结构、刀具的配置和加周、土改良措施、沉降控制方法等方面介绍土压平衡盾构穿越砂 层的施工技术.在施工过程中,通过采取同步注浆、二次往浆、加强施工监测等措旅保证了既有线行车安全. [关键词]土压平衡盾构;富水砂层;硝土改良;沉降控制 [中图分类号]U459.3 [文献标识码]A[文章编号]1002-8498(2011)07-0071-03 Key Construction Technology of Earth Pressure Balance Shield in Watery Sandy Stratum Xu Yan' Zhao Wen2 Huang Longguang' Gao Zhao (1.College of Cicil Engineering Shenyang Jianzhu University.Shenyang.Liaoning 110168 China: 2.College of Resources and Civil Engineering Northeastern University Shenyang Liaoning 110819 China; 3.The Fifth Construction Lid.of China Tiesiju Civil Engineering Group Jiujiang Jiangxi 332000 China) Abstract:Shielding section in Shenyang Metro Line 2 passes through medium coarse sand and gravel sand stratum which has characteristics of large internal friction angle poor fluidity of residue soil abundant groundwater and high water pressure.It is hard to control shield tunneling which may lead to ground settlement.Based on the adaptability of earth pressure balance shield the structure of cutterhead and screw conveyor distribution and reinforcement of cutting tool measures for improvement of residue soil and method of settlement control the construction technology of earth pressure balance shield crossing sandy str...