[关键词】隧道工程:潮底隧道:深基坑;支护;地下连续墙;施工技术 [中图分类号】TU753;U455.45;U459.5[文戴标识码]A[文章编号】1002-8498(2012)13-0085-05 DesignandConstruction of theExcavationSupport for theLiuhuaLake Tunnel Chen Jingiun (Ching Railway Firs Suey and Design Intiute Group Co.,Ld. ,Xian, Shaanxi 710043,China) Abstract :The tunnel erossing the Liuhua Lake, Guangzhou is a double-decked prehensive municipal tunnel. Open exeavation method was used for the middle section, where the geology condition was plicated and the construction site was limited. Influence to the environment had also to be strictly controlled. After paring among several schemes, the method of construetion cofferdam in bination with underground diaphragm wall was adopted. This paper introduces the design and construction pe qa s ooo p pe xem ys s u uo su p u oo impact bined method’ can be used for underground diaphragm walls. Key words:tunnels;lake tunnel;deep foundation excavation; supports;design; diaphragm wall; construction 1工程概况16.0~17.3m 广州市康王路下穿流花湖隧道工程是一条集2场地条件 城市道路和市政管线廊道于一体的综合性湖底隧2.1自然地理环境 道,隧道采用双层结构,上层为双管城市道路隧道,广州市地处南亚热带,属海洋季风性气候。
[关键词]盾构;始发;土体加固;流砂地层;盐水冻结 [中图分类号]U455[文献标识码】A[文章编号]1002-8498(2015)21-0088-04
Shield Lanuching Under Quicksand Stratum FengHuanhuan,WangZhufeng (State Key Laboratory ofShield Machine and BoringTechnology,Zhengzhou,He'nan 450001,China) Abstract:To solve the soil stabilization problem of shield launching under quicksand stratum, the utility tunnel construction in Haihe at Tianjin was used as an example.Based on the investigation and survey of relevant research literature at home and abroad,and successful experiences of EPB TBM launching under quicksand stratum,brine freezing technologyforsoil stabilizationof EPBTBMlaunchingwas analyzed in detail from the aspects of schematic design,equipment selection,key process control and so on.Aiming at solving the problems during EPB TBM launching, some appropriate measures were put forward. Key words:shields;launching; soil stabilization;quicksand stratum;brine freezing technology 盾构始发是隧道施工的一个关键环节,同时也工艺下穿海河隧道工程,设计标准高、施工难度大, 是盾构施工的重要风险源。
[关键词]水泥乳化沥青砂浆;无作轨道;施工技术;质量控制 [中图分类号]U213.244【文献标识码】A[文章编号]1002-8498(2013)11-0060-04 ConstructionandQualityControlofCement-emulsified AsphaltMortarinJinqinPassengerRailway Chong Lianhong',Han Dingsheng² (1.The 5th Engineering Co.,Ltd.,China Railway 18 Bureau Group,Tianjin 300459, China; 2.The Tianjin-Qinhuangdao Railway Passenger Dedicated Line Co.,Lud.,Tianjin 300142,China) Abstract:Based on the practical experience from the construction of cement emulsified asphalt mortar for the ballastless track of Jinqin Passenger Railway, quality standards, construction methods and construction quality controlling techniques were summarized. By fixing the key processes of wetting, mortar state controlling, mortar ratio adjusting and grouting and improving the key construction tools used in grouting,sealing and pumping, the quality problems such as floating pulp,mezzanine,etc.were effectively solved. This work helps the normalization and standardization for the construction of ballastless tracks and ensured the construction quality of cement emulsified asphalt mortar in Jinqin Passenger Railway. Key words;cement-emulsified asphalt mortar; ballastless track; construction; quality control 1工程概况行技术条件》(科技基[2008]74号)的相关要求(。
[关键词]地下工程;高层建筑;基坑;软土;降水;监测 [中图分类号]TU753[文献标识码]A[文章编号]1002-8498(2015)01-0021-04 DewateringConstructionTechnologyofDeepandSoftFoundation ExcavationinNo.9BuildingofJinwanPlaza LiXiaoke,Che Xiangnan,Tan Le,Xie Jingbiao,Kong Weili (China State Construction Engineering Co.,Ld.,Bejing 100037,China) Abstract:The foundation excavation depth of Jinwan Plaza No.9 Building is 24.8meters in soft soil area.The water content of aquifuge is high and it's hard for dewatering. Based on engineering practice, the authors proposed suitable construction technology.This paper mainly introduced the method for difficulties, optimization by BIM and technology of reducing pressure and plugging well. Key words:underground; tall buildings;foundation excavation; soft soil; dewatering;monitoring 1工程概况 本项目为津湾广场9号楼工程,建设地点位于 天津市和平区赤峰道、解放北路、哈尔滨道、合江路 围合的地块。
施工技术 2017年9月下 78 CONSTRUCTION TECHNOLOGY 第46卷第18期 D0I:10.7672/5j52017180078 津湾广场9号楼下挂双悬挂层重型转换桁架 安装与定位技术 杨艳超,郑世超,郑吉成,车向男,谢菁彪 (中建城市建设发展有限公司,北京100037) [摘要]津湾广场9号楼8层转换桁架安装工程,承接9层以上及7层以下受力转换,结构重要:整体桁架距地面高 度为32.4m 且单体构件质量大增加了吊装及安装难度;节点复杂,超宽超重构件数量较多,焊接难度大,50mm以 上的钢板对接焊缝占该部位焊缝的8%,极易产生焊接残余应力.通过进场前预拼装校核尺寸,安装前预排构件 顺序精确定位,安装后全过程应力监测尺寸复核等措施,减小了桁架安装定位误差,保证了安装质量及进度. [关键词]高层建筑:转换桁架;预拼装;数值模拟;安装;定位:偏差 [中图分类号]TU974;TU758.11 [文献标识码]A [文章编号]1002-8498(2017)18-0078-04 Installation and Location Technology of Heavy Conversion Truss Suspended Double Layers Structure in Jinwan Square No.9 Building YANG Yanchao ZHENG Shichao ZHENG Jicheng CHE Xiangnan XIE Jingbiao CSCEC City Construction Development Co.Lad.Beijing 100037 China) Abstract:The No.8 layer conversion truss installation project of Jinwan Square No.9 Building takes force transformation above No.9 layer and below No.7 layer its structure is important.The whole truss is 32.4m from the ground and the large monomer ponent weight increases the difficulty of hoisting and installation.The nodes are plex and a large number of ultra wide overweight members made welding difficult.The butt weld of the steel plate above 50mm accounts for 80%of the weld seam of this part it is easy to produce welding residual stress.Through the pre-assembly and size checking sequence pre- arranged of ponents of precise positioning the whole process monitoring of stress after installation redueed the positioning error of truss installation ensured the quality and ...
施工技术 2015年2月上 100 CONSTRUCTION TECHNOLOGY 第44卷第3期 D0I:10.7672/5js2015030100 洛阳新区博物馆多区域多坡度复杂屋面 复合防水保温层施工技术 李岐山,张伟,赵玉军 (河南国安建设集团有限公司,河南洛阳471000) [摘要]洛阳新区博物馆屋面为大型公建多区域多坡度3个漏斗形复杂屋面,其防水功能要求高,防水技术施工 难度大.为达到一级防水等级的要求,需依据屋面使用功能进行防排结合、综合治理、多道设防、优化防水设计,改 进施工工艺,完善施工方案.实践证明,本工程成功解决了防水施工技术难题. [关键词]防水工程;屋面;施工工艺;硬泡聚氨酯;泡沫混凝土 [中图分类号]TU761.11 [文献标识码]A [文章编号]1002-8498(2015)03-0100-03 Construction Technology of Composite Waterproof and Thermal Insulation Layer of Multiple Areas Complex Slope Roof of Luoyang New Museum Li Qishan Zhang Wei Zhao Yujun He'nan Guoan Construction Group Co. Lid.Luoyang He'nan 471000 China) Abstract:The roof of Luoyang new museum is the typical roof of large public building which consists of 13 plex multi-area funnel-shaped roofs.The function requirement of waterproof is very strict and the construction is difficult.To meet the requirements of the first waterproof level considering the use function of the museum the following methods are used:bination of waterproof and drainage prehensive treatment multichannel fortification optimization design of the waterproof and improving the construction plan.The results of the engineering practice show that the difficult problem of the waterproof construction technology is successfully solved. Key words:waterproofing;roofs;construction;hard foam polyurethane;foam concrete 1工程概况 型公建项目中极为少见(见图1). 洛阳新区博物馆工程位于洛阳市隋唐城遗址 东北角,在设计理念上体现了十三朝古都的历史内 涵和特色,建筑外形如大鼎,寓意“鼎立天下”,颇具 气势.博物馆主体部分东西长143.4m 南北宽 243.3m 总建筑面积为43654m2 由主楼展馆2层、 辅楼3层、下...
施工技术 2015年4月下 76 CONSTRUCTION TECHNOLOGY 第44卷第8期 D0I:10.7672/sgjs2015080076 洛阳天堂塔钢结构施工三维仿真分析* 何伟,何容,李晓克,朱亚飞 (华北水利水电大学土木与交通学院,河南郑州450045) [摘要]洛阳天堂塔是为保护洛阳市隋唐城天堂遗址而建设的钢结构建筑.天堂塔结构形式复杂,施工繁琐.为 保证塔身结构施工安全,采用ANSYS软件建立了天堂塔三维有限元模型,考虑了自重、塔式起重机附着、施工荷载 等,按设计施工顺序,进行了面向施工全过程仿真分析,研究了施工过程中的结构应力及其增量等变化规律.计算 结果显示,施工期内钢梁应力较小,结构安全,因此施工工序是合理的. [关键词]塔枪结构;钢结构;施工;数值模拟;分析 [中图分类号]TU391 [文献标识码]A [文章编号]1002-8498(2015)08-0076-04 Three-dimension Simulation for Steel Structure Construction of Luoyang Paradise Tower He Wei He Rong Li Xiaoke Zhu Yafei (School of Civil Engineering and Communication North China University of Water Resourees and Electric Power Zhengzhou He'nan 450045 China) Abstract:Luoyang Paradise Tower was constructed to protect the Sui-Tang ruin site in Luoyang city.The tower was a plex structure of which the construction course was plicated.In order to ensure the construction safety of the tower a three-dimensional finite element model of the Paradise Tower was established by software ANSYS to simulate the designed construction process under the load of self- weight crane attachment construction and so on.The structural stress variation and its increment during the construction process were studied.The calculation results showed that the stress of the steel tower was small in the all periods of construction so the safety of the structure was enough and the construction process was reasonable. Key words:towers;steel structures;construction;simulation;analysis 对于遗址保护结构来说,由于结构形式复杂,问题13)....
2014年4月下 施工技术 第43卷第8期 CONSTRUCTION TECHNOLOGY 65 D0I:10.7672/5js2014080065 洛阳天堂塔转换钢桁架临时支撑卸载 有限元模拟与施工设计 何伟,何容,李晓克 (华北水利水电大学土木与交通学院,河南郑州450011) [摘要]洛阳市隋唐城天堂遗址保护钢塔通过大跨度转换桁架结构支撑在基础环梁上,以保护塔下中心地带天堂 遗址区.采用ANSYS建立三维有限元模型模拟转换桁架卸载施工.并根据有限元模拟结果确定卸载施工工艺流 程.内、外环梁临时支撑点千斤顶分别缩缸8 4mm后可完成卸载.卸载时各支撑点按2次卸载,每次卸载量为总 卸载量的一半,内圈和外圈临时支撑交替卸载.卸载施工时对转换桁架关键构件部位进行了应力与沉降监测.监 测结果显示,实测值与理论值间最大应力误差为3.28MPa 最大位移误差为0.82mm 误差较小,结构整体刚度较 好,有限元模型模拟精度较高. [关键词]钢结构;转换桁架;卸载;施工;有限元分析;监测 [中图分类号]TU758 [文献标识码]A [文章编号]1002-8498(2014)08-0065-05 Finite Element Simulation and Construction Design of Luoyang Paradise Tower Steel Truss Unloading Course He Wei He Rong Li Xiaoke School of Ciril Engineering and Communication North China University of Water Resources and Electric Power Zhengzhou He'nan 450011 China) Abstract:Luoyang paradise tower was supported on the basis of a conversion ring beam to protect the heart area of Sui-Tang ruins paradise under the tower through a large-span steel truss structure.A 3D finite element model was used to simulate the unloading construction course of the converter truss by ANSYS.And based on the finite element simulation results the unloading construction process was designed which the temporary support jacks under the inner or outer ring beam were retracted 8 4mm respectively to plete the uninstall process.During the unloading course each supporting point unloaded for two times firstly unloaded half of the total amount of unloading displacement and the temporary support of the inner and out...
2015年8月上 施工技术 第44卷第15期 CONSTRUCTION TECHNOLOGY 35 D0I:10.7672/8js2015150035 洛阳博物馆新馆大跨度框架梁预应力损失测试研究 李岐山,张伟,赵玉军 (河南国安建设集团有限公司,河南洛阳471000) [摘要]洛阳博物馆新馆工程大跨度预应力框架梁采用后张有黏结预应力施工工艺,施工过程中应加强其预应力 施工控制,特别是张拉过程中的预应力损失监控及测试十分重要.通过精确计算出摩阻损失系数,测定出特征截 面的应力和应变值,并与理论设计验算值进行对比分析,可达到精确控制预应力施工质量的目的. [关键词]预应力;框架梁;后张法;施工质量控制;预应力损失 [中图分类号]TU378 [文献标识码]A[文章编号]1002-8498(2015)15-0035-04 Prestressing Loss Test of the Large Span Frame Beam of Luoyang New Museum Li Qishan Zhang Wei Zhao Yujun (He'nan Guoan Construction Group Co.Lid.Luoyang He'nan 471000 China) Abstract:In Luoyang New Museum the prestressing loss monitoring and testing play very important role in the process of tensioning especially for the prestressed control of the construction sequence of a large span prestressed frame beam adopting the post-tensioned prestressed technology.The measured values of stress and strain of the beam characteristic cross section are pared with the theoretical design calculation ones based on the coefficient of friction loss aceurately obtained in this paper.Finally it can achieve the purpose of precise control of the prestressing construction quality. Key words:prestressing;frame beam;post-tensioning method;quality control;prestressing loss 1工程概况 力状态十分重要,而且也是一个预应力结构施工控 洛阳博物馆新馆工程为特大型地市级博物馆,制中的一个难点. 设计使用年限为一级100年.总建筑面积 已有研究表明,超长结构混凝土梁采用无黏结 43654m2 由展览馆、辅楼、下沉广场、跌落水池、观 预应力温度筋及设置部分预应力配筋形式对解决 光塔组成.其中展览馆2层,长141m 宽143.4m 超长结构梁板温度应力裂缝、对提高预应力框架结 檐口高22m 为超长框架结构梁板.为解决超长结 构延性及其抗震性能都特别有效[.预应力框架 构的温度应力问题,展览馆首层和2层楼板均采用 梁张拉...
2015年4月上 施工技术 第44卷第7期 CONSTRUCTION TECHNOLOGY 99 D0I:10.7672/5js2015070099 泥炭土深基坑支护工程高压旋喷扩体锚索施工工艺 王家权,王维1,李文平,高炳勋1,唐和焱2,张庆文2 (1.西南有色昆明勘测设计(院)股份有限公司,云南昆明650051; 2.西南林业大学土木工程学院,云南昆明650224) [摘要]结合基坑支护工程实例,介绍了昆明软弱泥炭质土层高压旋喷扩体错索在深基坑支护工程中的施工工艺 及铺固试验.通过不同的施工工艺试验分析,探索针对该场地软弱地质条件下的预应力锚索施工工艺,以确保预 应力错索施工达到设计要求承载力,保证预应力错索的有效性和基坑支护结构体系的可靠性. [关键词]深基坑;支护;泥炭质土;错索;施工技术 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2015)07-0099-03 Construction Technology of High Pressure Jet Grouting Anchor Cable of Deep Foundation Excavation in Peat Soil Wang Jiaquan' Wang Wei' Li Wenping' Gao Bingxun' Tang Heyan2 Zhang Qingwen2 (1.Southuest Nonferrous Kunming Surreying and Design Institute Co.Lid.Kunming Yunnan 650051 China; 2.Faculty of Ciril Engineering Southwest Forestry University Kunming Yunnan 650224 China) Abstract:Based on engineering practice this paper introduced construction technique and anchorage test of high pressure rotary jet grouting anchor cable of foundation excavation supporting in peat soil in Kunming.According to the testing analysis on different methods this paper explored construction technique of prestressed anchor cable in soft soil which can ensure the bearing capacity of anchor cable meet the design requirement and the supports is effective and reliable. Key words:deep foundation excavation supports;peat soil;anchor cables;construction 0引言 为第四系冲、洪积层(Q) 岩性为粉质黏土;第 通过昆明市某项目基坑支护工程实例,介绍了四系冲、湖积层(Q) 岩性为粉质黏土、黏土、淤 该基坑支护工程中预应力锚索在软弱地质条件下, 泥质黏土、泥炭质土、含黏性土砾砂、粉土等.在 通过不同的施工工艺试验分析,探索针对该场地软 基坑开挖深度范围内,以填土、...
施工技术 2015年9月下 94 CONSTRUCTION TECHNOLOGY 第44卷第18期 D01:10.7672/gjs2015180094 泥浆处理技术在中信城市广场项目中的应用 高海彦,高金银,王宝德,张兆吉,刘成 (中国建筑第八工程局有限公司天津分公司,天津300452) [摘要]泥浆护壁钻孔灌注桩钻孔用水量大、泥浆排放多,如何有效降低用水量、减少泥浆排放,一直是这一工艺需 要创新提高的重要内容之一.中信城市广场项目,为节约用水、减少泥浆排放,项目设计了一种“旋挖钻机回转 钻机除砂器”的组合工艺,实现了大幅减少桩基钻孔用水、减少泥浆排放、黏性土配制高质量泥浆几个既定目标. 在此基础上,又引进了新型泥水分离设备及技术,在本工程桩基施工中进行了试验应用,泥浆分离及应用效果良 好,可在今后类似工程施工中继续探索发展、推广应用. [关键词]桩基础;泥浆;钻孔灌注桩;减排;分离 [中图分类号]TU447 [文献标识码]A [文章编号]1002-8498(2015)18-0094-04 Mud Treating Technology Application in Zhongxin City Square Gao Haiyan Gao Jinyin Wang Baode Zhang Zhaoji Liu Cheng Tianjin Branch of China Construction Eighth Engineering Division Co.Ld.Tianjin 300452 China) Abstract:Bored piles with mud protection has disadvantages of large water consumption lots of mud emission.How to reduce the water consumption and mud emission is an important content for the process innovation.Based on the Zhongxin city square project a posite process is designed as rotary drilling rig rotaring drilling sand separator to reduce the water consumption and mud emission and the high quality mud is prepared with cohesive soil.Based on this method a new mud separation device is applied and the testing is put forward in the construction.The mud separation effect is very good and the further development and exploration will be done in the similar project. Key words:piles;mud;bored piles;emission reduction;separation 1技术背景 室全逆作施工.地下室为框架结构,设计模式为1 中国水资源总量少于巴西、俄罗斯、加拿大、美柱1桩,地下连续墙兼作结构外墙.承担边跨结构荷 国和印度尼西亚,居世界第六位.若按人均水资源 载...
2012年10月上 施工技术 第41卷第374期 CONSTRUCTION TECHNOLOGY 97 泥水平衡式矩形顶管在市政工程中的应用 邹思源 (广东省基础工程公司,广东广州510620) [摘要]结合某浅覆土砂层地下人行通道工程实际,研究了泥水平衡式矩形顶管设备、管节参数和细部构造处理. 从矩形顶管机进出洞方法、泥水平衡控制、顶进方向控制、注浆减阻、地下管线沉降控制等方面对顶进过程的关键 工序进行了详细介绍.工程实践表明,该方法能较好地解决在高水位浅覆土砂层施工市政通道的问题. [关键词]地下工程;市政工程;浅覆土砂层;矩形顶管;泥水平衡;注浆;沉降 [中图分类号]TU997 [文献标识码]A[文章编号]1002-8498(2012)19-0097-03 Application of Slurry Balance Rectangular Pipe Jacking in Underground Municipal Engineering Projects Zou Siyuan Guangdong Foundation Engineering Company Guangzhou Guangdong 510620 China) Abstract:With the experience of some underground pedestrian crossing project in shaliow covering sand layer this paper researched equipment pipe parameters detail structure of slurry balance rectangular pipe jacking.Key process of jacking is introduced in detail from entering and leaving tunnel method slurry balance control resistance reduction by grouting and settlement control of underground pipeline. Engineering practice shows that this method can solve the problem that municipal passage construction in shallow covering sand layer with high water level. Key words:underground;municipal engineering;shallow covering sand layer;rectangular pipe jacking; slurry balance;grouting;settlement 一矩形顶管是圆形顶管的延伸,但敷设矩形管道43.5m 穿越地层主要为②2淤泥质粉细砂层,地下 所用的顶管机在切削功能、机械动力、纠偏功能等水位高,顶进管节宽6,高4.3m.南桂东路车流量 方面需具有更高的要求,在矩形管节防水、顶管机大,地下管线较多,沿顶进方向依次有2孔电信光 进出洞和前方土体平衡方面要求也更高.目前应纤、1孔路灯线、15孔电信线、600mm混凝土排水 用较多的为土压平衡式矩形顶管,且有多个成功案管(管底离顶管顶部最近仅2.6m)、1孔路灯线、2 例,但泥水平衡式矩形顶管尚未见报导.本文结合 孔10kV电力线2条、600mm铸铁给水管.顶...
施工技术 2011年5月下 74 CONSTRUCTION TECHNOLOGY 第40卷第341期 泡沫轻质土充填技术及应用 陈忠平,孙仲均2,钱争晖3 (1.广州大学工程材料研究所,广末广州511440;2.中国建筑科学研究院,北京100013; 3 北京市热力集团,北京100026) [摘要]试验研究和工程实践表明,泡沫轻质土具有稳定物理力学性能和良好施工性,目前已在采空区充填、道路 加宽、软弱地基处理基坑及管线回填和工程应急抢险等方面得到广泛应用.详细介绍了泡沫轻质土的原材料与 制作,及其优点和特性,最后提出在某些实际工程中应用效果显著. 【关键词]泡沫;轻质土:充填材料:地基处理 [中图分类号]TU521.3 [文献标识码]A [文章编号]1002-8498(2011)10-0074-03 Filling Technology and Application of Foamed Light-weight Soil Chen Zhongping' Sun Zhongjun2 Qian Zhenghui' (1.Institute of Materials Engineering.Guangzhou University Guangzhou Guangdong 511440 China; 2.China Academy of Building Researeh Beijing 100013 China;3.Bejing District Heating Group Bejing 100026 China) Abstract:The project experience and test research show that foamed light-weight soil has a stable physical mechanical properties and good workability.For the good characteristics of foamed light-weight soil many projects such as goaf filling road widening soft foundation treatment foundation excavation and pipes backfilling project emergency treatment choose this material.The making and raw materials of foamed light-weight soil and its advantages and characteristics are introduced in detail.Some examples are cited to show that foamed light-weight soil has a good effect. Key words:foam light-weight soil;filling material;foundation treatment 1泡沫轻质土的原材料与制作 拌合水不应含有影响泡沫稳定性、泡沫轻质土 泡沫轻质土是用物理方法将发泡剂水溶液制备强度及耐久性的有机物、油污等杂质. 成泡沫,与必须组分水泥基胶凝材料、水及可选组分 发泡剂应符合下列要求:①对环境应无不良影 骨料、接和料、外加剂等按一定比例混合搅拌,并经响,宜采用界面活性类发泡剂;②在℃以上的温度 物理化学作用硬化形成的一种轻质材料.制作泡...
2014年8月下 施工技术 第43卷第16期 CONSTRUCTION TECHNOLOGY 99 D0I:10.7672/5j52014160099 泡沫沥青冷再生技术应用研究 王菊蕊,王轩 (河南交通职业技术学院,河南郑州450005) [摘要]对泡沫沥青冷再生技术方案的选择及材料设计配合比进行了介绍,并对影响配合比因素进行讨论.通过 对泡沫沥青冷再生材料力学性能研究分析,探讨了就地冷再生技术的设计和施工控制的关键因素.结合施工,总 结了泡沫沥青就地冷再生技术内涵和特点及原理和施工工艺. [关键词]泡沫沥青;冷再生;力学性能;试验;研究 [中图分类号]U416.26 [文献标识码]A [文章编号]1002-8498(2014)16-0099-03 Study on Application of Foam Asphalt Cold Recycling Technology Wang Jurui Wang Xuan He'nan Communications Polytechnic Zhengzhou He'nan 450005 China) Abstract:Scheme selection and design of materials mix proportion of the cold in-place reeycling technology with foamed bitumen are introduced and the factors influencing the mix proportion are discussed.Through research and analysis on mechanical properties of the cold of foamed asphalt recycled materials the authors discuss the key factors in the design and construction control of cold in-place recycling technology.Combined with the construction practice the cold in-place recycling technology with foamed bitumen content the characteristic principle and construction technology are summed up. Key words:foamed asphalt;cold regeneration;mechanical property;test;research 0引言 时,沥青泡沫散布于细粒料的表面,加之与冷湿骨 泡沫沥青冷再生技术是直接将原路面一定厚 料有很好的裹覆性能,形成粘有大量沥青的细料填 度铣刨、破碎,加入稳定剂和适当比例的新骨料就 缝料,经过拌合、压实作用下形成强度,增加黏聚 地拌合,碾压成型的路面改造方法之一.这种方法 性,使混合料达到稳定. 能够实现降低道路维修成本,保持路面结构完整 2工程概况 性,兼有柔性结构层的特点,且施工周期短等优点. 省道豫02线是豫西南一条重要通道,由于近年 废旧路面材料的再生利用,不仅节约资源,保护生 来交通量的增加,原路面已经不能满足交通量的需 态环境,同时也具有很好的经济和社会效益. 要,破坏比较严重.选取试验路段进行现场调查及 1泡沫沥青冷再生技术原理 试验,路面破损主要以纵横向裂缝较多...
2011年4月下 施工技术 第40卷第339期 CONSTRUCTION TECHNOLOGY 101 沥青路面就地冷再生工程的水损坏研究 曹林涛,张郭峻2,黄菊3,叶玮2 (1.裹类学院建筑工程学院,湖北裹阳441053;2.襄阳市公路管理处,湖北襄阳441003; 3.襄阳市公路管理处奖坡公路段,湖北裹阳441100) [摘要]伴随资源节约型社会的建设,沥青路面就地冷再生技术推广迅速,水损坏是主要损坏形式之一.通过工程 调研,把冷再生工程的水损坏类型归纳为基层坑槽、面层翻浆或哪泥和面层反射车辙.通过损坏路段的开挖与取 芯试验,研究了不同类型的损坏原因.结果表明排水不良促进了这些损坏的发生.指出路侧排水边沟开挖,基层 结构内部盲沟设置是解决道路排水不良问题的关键措施. [关健词]沥青路面;就地冷再生;水损坏 [中图分类号]U416.217 [文献标识码]A [文章编号]1002-8498(2011)08-0101-03 Water Damage Study on Cold In-place Recycling of Asphalt Pavement Cao Lintao' Zhang Guojun2 Huang Ju' Ye Wei (1.School of Engineering Architecture Xiangfan University Xiangyang Hubei 441053 China; 2.Xiangyang Road Administration Bureau Xiangyang Hubei 441003 China: 3.Fancheng Office Xiangyang Road Administration Bureau Xiangyang Hubei 441100 China) Abstract:With the construction of resource-saving society cold in-place recycling technology of asphalt pavement is promoted rapidly.Water damage is one of the main damage types.Through investigation of cold in-place recycling projects water damage types are summarized into three types including pit slot boiling and reflective rutting.Through excavation and coring tests at damage place reasons for different damage types are studied.Results show that poor drainage promotes these damage events.It is pointed out that the drainage ditch excavation on the road side and the setting of blind drain in base structure are key measures for solving poor drainage. Key words:asphalt pavement;cold in-place recycling;water damage 就地冷再生技术...
施工技术 2015年8月上 74 CONSTRUCTION TECHNOLOGY 第44卷第15期 D0I:10.7672/8js2015150074 沥青混合料抗车辙添加剂应用技术研究 李晓东,刘锋,尹始超 (济南城建集团有限公司,山东济南250031) [摘要]应用抗车辙沥青混合料的主要目的在于减少车辆荷载作用下沥青混凝土产生的应变及变形,减少变形中 的不可恢复残余部分,提高沥青路面高温抗变形能力,延缓车辙的产生.研究了通过干法加人抗车辙添加剂,提高 高温稳定性的沥青混合料.实践证明,使用抗车辙沥青混合料技术后未出现车辙、推移和拥包等高温病害,改善效 果显著. [关键词]公路工程;路面;抗车辙;添加剂;沥青 [中图分类号]U411 [文献标识码]A [文章编号]1002-8498(2015)15-0074-04 Research on Application Technology of Anti-rutting Additive of Asphalt Mixture Li Xiaodong Liu Feng Yin Yichao (Ji'nan Urban Construction Group Ji'nan Shandong 250031 China) Abstract:The main aim of using anti-rutting additive in asphalt mixture is reduce vehicle load produced by the strain and the deformation of irreversible residual improve the high temperature deformation resistance of asphalt pavement as well as delay the produce of the rut.This paper refers to the anti- rutting additive of asphalt mixture through the dry process to improve the high-temperature stability of asphalt mixture.Practice proves that the anti-rutting additive can effectively improve the performance of asphalt mixture under high temperature without rutting elapse or lump. Key words:road construction pavements;anti-rutting;additives;asphalt 1车辙产生原因 低速行驶或静止这种长作用周期荷载现象居多,此 车辙是城镇道路沥青路面的主要病害形式之 时路面结构中最大剪应力多出现在路表面下8~ 一,随着城市交通量的增大、大型公共车辆的增多 10cm处,大约是中面层位置:②信号灯及公交车停 以及交通流渠化的不断增强,使得沥青路面在开放 靠站台或港湾处,车辆的频繁刹车和启动,增大了 交通、投入运营后不久就出现车辙、拥包和波浪等 车轮对路面作用处的合成剪应力,特别是路表面剪 高温病害.车辙病害,特别是高等级城市道路的车 应力增大,是造成车辙和拥包的主要原因:③在长、 辙病害,严重影响城镇道路沥青路面的使用和服务 大纵坡路段,车辆在上坡和下坡过程中,荷载的不 ...
2012年8月下 施工技术 第41卷第371期 CONSTRUCTION TECHNOLOGY 101 沥青混合料中掺加消石灰粉替代部分 矿粉施工质量控制 宋宗平 (中交一公局第三工程有限公司,北京100120) [摘要]为改善沥青与石料黏附性,提高沥青路面的抗水损害能力,在连盐高速公路下面层结构沥青混凝土混合料 中,以消石灰替代部分石灰岩矿粉(总量不超过混合料质量的2%)进行施工.介绍了消石灰粉替代部分矿粉进行 施工的工序、配合比设计、压实方案和施工控制要点,最终沥青混合料总体质量得到控制. [关键词]沥青;消石灰;矿粉;配合比设计 [中图分类号]TU7;U416.217 [文献标识码]A [文章编号]1002-8498(2012)16-0101-03 Quality Control of Asphalt Mixture with Hydrated Lime Changing Some Mineral Powder Song Zongping The Third Engineering Co.Ltd.of the First Highway Engineering Bureau of CCCC Beijing 100120 China) Abstract:Changing some mineral powder for hydrated lime in asphalt mixture at down layers of Lianyungang-Yancheng expressway is applied to improve the adhesion between asphait and pebbles and water damage resistance for asphalt pavement.The construction process mix proportion pacting scheme and construction control points of the method of changing some mineral powder for hydrated lime is introduced.The whole quality of asphalt mixture is controlled. Key words:asphalt;hydrated lime;mineral powder;mix proportion design 为改善沥青与石料黏附性,提高沥青路面的抗 AC-25S型沥青混凝土面层粗骨料试验结果合 水损害能力,在连盐高速公路下面层结构沥青混凝 格,满足规范要求,如表1所示. 土混合料中,以消石灰替代部分石灰岩矿粉(总量 表1AC-25S型沥青混凝土面层粗骨料试验结果 不超过混合料质量的2%).下面以沥青下面层(沥 Table 1 Test results of coarse aggregate on AC-25S 青混凝土类型AC-25S)为例进行阐述. asphalt concrete surface 1准备工作 指标 材料规范 吸水 试验结果 名称要求 率/% 1.1原材料技术要求 相对密度 1号料>2.5表观相对密度2.719 0.20 沥青下面层采用AH-70沥青;石料选用石灰 毛体积相对密度2.704 岩,骨料坚硬、清洁、干燥、无风化、无杂质、活性物 2号料>2.5 表观相对密度2.7260.42 毛体积相对密度2.697 质含量低;矿粉使用石灰岩矿粉,实测含水量< 0.1%;...