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1、福建省南安市县道329线南安至官桥段公路扩建工程后张法预应力空心板梁预制施工组织设计山东天诚市政公路工程有限公司南官公路扩建工程项目部2012年 月Opinions and suggestions on the partys mass line educational practiceAccording to the central and provincial, municipal unified deployment, according to municipal Party committee about carrying out the partys mass line educati
2、onal practice activity in the citys implementation opinions, the spirit of the partys mass line educational practice activities from 20* in January to 99 months, carried out at all levels of departments and directly affiliated institutions and grass-roots party organizations. According to my actual
3、County, the county to carry out the education practice put forward the following implementation opinions.First, the overall requirementsCounty county education practice to the eighteen Party of eight, the spirit of the the third Plenary Session of the 18th CPC Central Committee as the guidance, cons
4、cientiously implement the spirit of general secretary Xi Jinping book series of important speech, earnestly implement the Central Committee really, opinions and advice , party implementing the guiding ideology of opinions to determine the objectives and requirements, step method, in accordance with
5、the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic honest people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their work style, service to the masses of the people, the foundation of consolidating grassroots
6、, promote transformation across efforts, to further implement the central eight regulations and The opposition party and government austerity waste regulations , double section provincial regulations, municipal provisions of the twelve plan and the implementation measures for on improving the work s
7、tyle of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose formalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members and cadres of the style and the masses of people strong, the Ministry of Party members
8、and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to close, honest and pragmatic people honest image to further establish the foundation to further reinforce the basic level. Style of the building of the new results to promote the con
9、struction of a powerful force of the county and the ecological culture of the county and county construction.In educational practice activities of the unit is mainly: the county and below county departments under the organs, enterprises and institutions directly under the township, street, and commu
10、nity, village, non-public economic organizations, social organizations and other grass-roots organizations. Agencies and branches, each single unit, follow the rules on internal institutions. Educational practice with step by step.To adhere to the county leadership, leadership and leading cadres to
11、focus on outstanding catch to directly contact the service of the masses of law supervision departments and window units, service industry, educational practice, pay attention to grasp the heavy towns, streets and villages, community education activities and the masses of grassroots groups in close
12、contact to strengthen, and the majority of Party members, cadres and the mass line line Marx doctrine view of the masses and the partys education.Always speak seriously as a basic attitude, adhere to positive education, to carry out criticism and self criticism group, adhere to the pragmatic, more e
13、mphasis on leadership, pay more attention to the layers of the demonstration, more focus on the four winds, solve the problem, pay more attention to open the door, the participation of the masses, pay more attention to the classification guidance. Orderly, pay more attention to the cooperation and c
14、ohesion driven, more strict requirements on injection, really supervision practice, ensure education practice is not empty is not empty is not partial, not as a mere formality.Two, the key point of the taskThe main task of the countys education practice is to seize against four wind this focus on ce
15、ntralized solve outstanding problems asked County, township leadership and leading cadres of the four winds, the disadvantages of the style, scale behavior to a large scale investigation, overhaul, cleaning greatly. At the same time, respond to the concerns of the masses, safeguard the interests of
16、the masses, pay attention to solve practical problems, solve the people around the unwholesome tendencies especially on eat, take the card, Yong lazy luxury, extravagance and waste fees, privileges and other issues, timely and effective, without any discount to solve, to improve the style of real im
17、plementation of the requirements of real to the grassroots, real let group Benefit the public.(a) focus on solving the four winds outstanding issuesThe central and provincial requirements, the county leadership and leading cadres of key performance concept is not correct, do not dare to play, to eng
18、age in image project, political project, a leadership guide, a set of ideas, orders and prohibitions, and a policy, there are countermeasures county. The units directly under the heavy focus on solving Yung lazy drag, buck passing skin, work is not implemented, the service is not active. The dynamic
19、 problem of law enforcement and supervision departments and window units, service industry mainly solve the door hard, ugly face, something difficult, and arbitrary charges, fines, levies, and breach of privilege, chinakayao, not the problem of law. The township, street The collar of leading bodies
20、and leading cadres to solve key does nottheir own conditions to develop the correct road, the maximum to avoid investment risk, gain profit.(three) vigorously promote the brand. To establish brand awareness, awareness of the use of brand, brand value, brand acquisition performance, enhance the compe
21、titive strength. Concentrated manpower, careful planning, packaging and publicity of a number of unique, market influence and coverage of the brand, the implementation of key breakthroughs, to enhance the competitive strength, walking business road the competition of alienation and characteristics,
22、the pursuit of stability and development of the market.(four) to promote the integration of resources. To further broaden their horizons, effective integration of resources within the group, the city resources, other industries and regional resources, mutual trust, mutual benefit, seeking win-win pr
23、inciple, in the framework of national policies and regulations, strict inspection and argumentation, legal consultation, examination and approval procedures, strict regulation of economic activities, attract injection the social investment to the industry group, to achieve leveraging the development
24、, ensure that the value of state-owned assets.(five) to strengthen the construction management personnel. Strengthen the management of education and training of cadres and workers of the existing business, firmly establish the concept of the market, enhance the sense of crisis to adapt to market com
25、petition, the sense of urgency, improve the ability to respond to market competition, improve management and operation of the market. At the same time, according to the need of industrial development, vigorously the introduction of high-quality management management personnel, and strive to build a
26、high-quality professional management team, hard work, and promote the entire workforce knowledge structure, age structure, structure optimization and upgrading ability, enhance core competitiveness, adapt to the need of market competition.(six) seriously study the policy for policy. Serious research
27、 about social support the development of cultural undertakings in the country and the XX policy, especially the policy of industrial development, financial investment policy, financial policy and tax policy, and actively seek policy, projects and funds, enterprise and industry group mission to promo
28、te leapfrog development.17后张法预应力空心板梁预制一、编制依据1、设计图纸；2、公路工程技术规范JTJB01-20033、公路桥涵施工技术规范JTG/T F5020114、公路工程质量评定标准(JTJ F80/1-2004)等5、钢筋混凝土用热轧带肋钢筋（GB/1499.1-2008）6、预应力筋用锚具、夹具和联结器（GB/T14370-2000）7、预应力混凝土用钢绞线（GB/T5224-2003）8、公路桥梁板式橡胶支座（JT/T663-2006）二、工程概况YK8+048.48小桥与路线交角105度，采用1-10m后张法预应力砼空心板，梁高60cm。桥面铺装为1
29、2cm现浇防水混凝土。在两侧桥台处设40型伸缩缝。下部结构为U型台，扩大基础，桥梁位于曲线上。三、施工方案(一) 空心板梁预制施工工艺底模清洗、涂脱模剂在底模上绑扎底板、腹板钢筋安装预应力管道安装侧模及端模绑扎顶板钢筋浇筑砼养生拆模养生张拉压浆封端移梁至存梁场。(二) 空心板梁预制施工方法（1） 钢筋加工及安装钢筋下料、加工、定位、绑扎、焊接严格按照规范及设计图纸进行。所有钢筋交叉点均必须双丝绑扎结实，必要时可用点焊焊牢。钢筋绑扎、安装时应准确定位，伸缩缝及防撞护栏等预埋筋、翼缘板钢筋、端部横向连接筋必须使用钢筋定位辅助措施进行定位；端隔板钢筋必须确保高低、间距一致，符合设计要求，无漏筋现象，
30、也可采取提前制作，整体安装；与波纹管等干扰的钢筋严禁切断，应采取合理措施避开。钢筋表面保持清洁无油渍、泥土、铁锈等。钢筋采用调直机拉直时，级钢筋伸长率不得大于2%，调直后的钢筋用断线钳下料；直径为10mm以上的、级钢筋采用钢筋切断机下料。钢筋直径小于12mm时采用绑扎，当钢筋直径大于或等于12mm时采用搭接焊，焊接质量符合规范要求，搭接焊双面焊搭接5倍d,单面焊搭接10倍d（d指钢筋直径）。箍筋的弯曲由人工操作，制作时严格控制几何尺寸和弯曲角度，以免影响骨架的外形尺寸和形状。钢筋成品与半成品分开堆放，并标识齐全。钢筋施工时先绑扎底板和腹板钢筋，再安装顶板钢筋。钢筋骨架绑扎时，在主筋上用石笔画出
31、箍筋间距，然后绑扎箍筋，制成的骨架具有足够的刚度和稳定性。底板钢筋保护层采用与设计保护层厚度等厚的梅花形高强度砂浆垫块，确保垫块能承受足够压力而不破碎，绑扎牢固可靠，纵横向间距均不得大于0.8m，梁底位置不得大于0.5m，确保每平方垫块数量不少于4块。顶板钢筋绑扎时，保证预埋件位置的准确性。为防止芯模上浮，将固定芯模的箍筋与底板筋焊接。并且在侧模顶端间隔60cm设置固定横杆的扣环，在横杆与主筋之间支垫混凝土保护层垫块，以防止钢筋整体上浮，进而达到防止芯模上浮的效果（2） 波纹管的预埋在钢筋绑扎过程中，应根据设计精确固定波纹管和锚垫板位置，波纹管U型定位钢筋必须敷设，每50cm设置一道，不得缺省
32、。波纹管的连接应采用管长20cmm的大一号同型波纹管作接头管，接头长度不低于规范要求，并在波纹管连接处用密封胶带封口，确保不漏浆。为保证预留孔道位置的精确，端模板应与侧模和底模紧密贴合，并与孔道轴线垂直。孔道管固定处应注明坐标位置，锚垫板还应编上号码，以便钢绞线布置时对号入座。钢筋焊接时，应做好金属波纹管的保护工作，如在管上覆盖湿布，以防焊渣灼穿管壁发生漏浆。钢绞线下料时要通过计算确定下料长度，要保证张拉的工作长度，下料应在加工棚内进行，切断采用切断机或砂轮锯，不得采用电弧切割，同时注意安全，防止钢绞线在下料时伤人。圆形波纹管在浇筑前应穿入比波纹管小1cm的塑料软管，防止波纹管挤压变形、漏浆，
33、确保在进行预应力施工时的质量。塑料衬管应在混凝土初凝后及时抽出。（3） 模板施工梁体模板在加工厂加工完成运到现场后，放在存梁场位置，按顺序分别编号。安装采用人工拼装。单体组拼时严格按顺序拼装，不得错乱，装拆时应注意以下事项：a在整个施工过程中要始终保持模板的完好状态，认真维修保养。b在吊运过程中，注意避免碰撞。c首次使用时采用钢丝刷或角磨机清除锈垢，然后涂刷脱模剂，做到均匀、不遗漏。d装拆时检查接缝处止浆垫的完好情况，如发现损坏及时更换，以保证接缝严密、不漏浆。e安拆精度要符合规范要求。在安装过程中及时对各部分模板进行精度控制，安装完毕后进行全面检查，超出容许偏差及时纠正。（4） 砼浇筑浇筑前
34、应严格检查泄水孔、伸缩缝、护栏、支座等附属设施的预埋件是否齐全。钢筋和模板安装完毕，经监理工程师检查验收并签认后进行砼的浇筑。砼在拌和站集中拌制，经试验确定掺加适量高效减水剂，水平运输采用砼罐车车运输，龙门吊提升入模。振捣以附着式振捣为主，插入振捣为辅。浇筑采用水平分层，斜向分段的连续浇筑方式，从梁的一端顺序向另一端推进。分段长度3m5m，分层下料厚度不超过25cm，上层砼必须在下层砼初凝之前覆盖，以保证接缝处砼的良好接合。浇筑到顶板后，及时整平、抹面收浆、拉毛。浇筑过程中，经常用通孔器疏通波纹管，保证管道畅通。砼浇筑施工注意事项：a浇筑前对所有操作人员进行详细的技术交底，并对模板和钢筋的稳固
35、性以及砼的拌和、运输、浇筑系统所需的机具设备是否齐全完好进行一次全面检查，符合要求后方可施工。b浇筑时，下料均匀、连续，不要集中猛投而产生砼的阻塞。在钢筋密集处短时开动侧振或插入式振捣器以辅助下料。c施工中随时注意检查模板、钢筋及各种预埋件的位置和稳固情况，发现问题及时处理。d浇筑过程中随时检查砼的坍落度和干硬性，严格控制水灰比，前后台密切配合，以保证砼的质量。e每片梁除留足标准养护试件外，另制作随梁同条件养护的试件3组，做为拆模、张拉等工序的强度控制依据。f认真填写砼浇筑施工原始记录。（5） 养生、拆模梁体砼浇筑完成后，立即用帆布覆盖，蒸汽养生。同体养生试块强度达到20MPa后即可进行拆模，
36、然后继续覆盖养生。（6） 预应力钢铰线的张拉及压浆（工艺流程详见附表2）a.梁的砼强度达到设计强度90%，且混凝土龄期不小于5d后，方可张拉。预应力钢束采用两端同时张拉，锚下控制应力为0.75fpk=1395Mpa。预施应力采用控制应力和伸长值(应变)双控法、互相校核。本合同段选用YCW150型千斤顶，按规范经校核后使用。严格按设计要求进行预应力筋的下料、编束、穿束。每组钢束采用两端张拉，对称、均衡进行。张拉顺序为50%左N1100%右N1100%左N1。张拉过程中绘制张拉管理曲线图，对张拉全过程进行监控，确保有效应力达到设计的100。当实际伸长值与理论伸长值之差大于6时，立即停止张拉，查明原
37、因并采取措施调整后，再继续张拉。发生滑丝或断丝超过规范要求时，进行更换后重新张拉。b.预应力钢束张拉程序010（初张拉）20100（持荷2分钟锚固）。预应力钢束张拉完成后，测定回缩量和锚具变形量，检查是否有断丝、滑丝现象，在征得监理工程师认可后割断露头。c.孔道压浆、封端所有钢铰线张拉锚固完成后，进行孔道压浆。压浆采用活塞式压浆泵，灰浆拌制采用灰浆搅拌机。在压浆前先用高压水冲洗孔道，然后用空气压缩机吹干孔道内的积水。再采用压浆泵压入水泥浆，水灰比选用0.40.5，灰浆掺加高效减水剂及膨胀剂，以0.40.7MPa的恒压，一次注浆完毕，压浆完成后及时封锚。为了确保压浆、封锚质量，防止压浆后灰浆收缩
38、出现空隙，在施工时，严格控制水泥浆的水灰比及压浆压力并做好压浆记录。压浆操作程序如下清洗孔道：锚外多余预应力筋割掉后，观察确无滑丝等现象后，先用高压水冲冼孔道，后用高压风吹干孔道。安装压浆器具：依次安装密封盖、压浆嘴、压浆阀，并将压浆管道与压浆机、进浆阀连接在一起，使进浆阀和出浆阀为开通状态。拌制灰浆：在拌和机启动后，先加水，后倒入水泥和减水剂和膨胀剂，拌和时间不少于3分钟。启动压浆泵开始压浆，待出浆阀溢出的水泥浆变成原浆时，关闭出浆阀，并保持0.5Mpa的压力持压2分钟，然后关闭进浆阀，最后压浆泵回浆，卸掉压浆管。拆卸压浆器具：待灰浆初凝后，拆除压浆阀、压浆嘴、密封盖等，并清洗干净以备下次使
39、用。四、工程质量通病及防治措施（一）钢筋工程1）表面锈蚀预防措施：钢筋原料存放在仓库或料棚内，保持地面干燥，钢筋存放离地面距离300以上；先进库先使用，尽量缩短库存时间。治理方法红褐色锈斑的清除，可采用手工或机械方法除锈，盘条细钢筋可通过冷拉或调直过程除锈。仓库设专人验收入库钢筋，库内划分不同钢筋堆放区域，每堆钢筋均立标签挂标牌，标明品种、等级、直径、技术证明编号及整批数量等。2）钢筋骨架外形尺寸不准绑扎时将多根钢筋端部对齐；防止钢筋绑扎偏斜或骨架扭曲。将导致骨架外形尺寸不准的个别钢筋松绑，重新安装绑扎。3）、保护层不准预防措施检查垫块厚度是否准确，数量是否足够。采取措施防止钢筋在混凝土振捣时
40、移位。浇筑砼时严防振捣器碰撞钢筋或模板，以防保护层垫块移动。浇注混凝土前，仔细检查钢筋保护层厚度。(二)混凝土工程1）麻面预防措施：a) 模板面清理干净，不粘干硬水泥砂浆等杂物。b) 钢模板脱模剂要涂刷均匀，不漏刷。c) 混凝土严格按操作规程分层均匀振捣密实，严防漏振；每层混凝土均应振捣至气泡排除为止。2）露筋预防措施：混凝土浇注前，检查钢筋位置和保护层厚度是否准确，发现问题及时修整。固定好垫块以保证混凝土保护层厚度。钢筋密集时，选配适当的石子。严禁振捣棒撞击钢筋以防钢筋移位。正确掌握拆模时间，防止过早拆模。操作时不得踩踏钢筋，尽量设置施工脚手架。治理方法将外露钢筋上的混凝土残渣和铁锈清理干净
41、，用水湿润，再用1：2或1：2.5水泥砂浆抹压平整；如露筋较深，将薄弱混凝土剔除，冲刷干净湿润，用高一级的细石混凝土捣实，认真养护。3）蜂窝预防措施混凝土搅拌时严格控制配合比。混凝土拌合均匀，颜色一致。混凝土自由倾落高度不超过2m。混凝土分层捣固。插入式振捣器的移动间距不大于其作用半径的1.5倍。掌握好每点振捣时间。浇注混凝土时，经常观察模板、对拉等情况，发现问题及时处理。4）混凝土收缩裂缝预防措施配制混凝土时，严格控制水灰比和水泥用量，选择级配良好的石子，减小空隙率和砂率，浇注时捣固密实以减小收缩量。浇注混凝土前，将基层和模板浇水湿透。混凝土浇注后，对裸露表面及时用潮湿材料覆盖，认真养护，防
42、止强风化吹袭和烈日曝晒。在气温高、温度低及风速大时浇注混凝土，及早进行喷水养护，使其保持湿润。夏季应适当延长养护时间，以提高抗裂能力。冬季应适当延长保温和脱模时间，使缓慢降温，以防温度骤变，温差过大引起裂缝。基础部分早回填保湿保温，减少温度收缩裂缝。治理方法如混凝土仍保持塑性，可采取及时压抹一遍或重新振捣的办法来消除，再加强覆盖养护。如混凝土已硬化，可向裂缝内装入干水泥粉，然后加水湿润或在表面抹薄层高标号水泥砂浆。五、确保工程质量和工期的措施1. 确保工程质量的主要措施建立项目质量管理机构，树立质量意识，健全保证体系，明确创优目标，落实质量职责，强化质量意识，健全规章制度。 严把材料采购、进场
43、检验关。进入工地的所有原材料，严格从符合设计要求，经过认真验收，从材料的外观质量、数量、品种等方面检查是否符合施工技术规范和设计规定的要求。 加强内业检查，做到内外业同步完成，工程竣工后，保证提供资料齐全、记录准确、图文并貌的全套竣工资料。2. 确保工期的措施在施工中不断优化施工组织和施工方案，合理调配人员设备，应用先进施工方法，精心安排保证工程按计划进度顺利进行。 强化施工调度指挥与协调工作，超前布局谋势，密切监控落实，及时解决问题，避免工期延误。按实际进展情况及时对计划安排进行修订，并适时掀起生产高潮，加快施工进度。六、安全保证措施设置安全管理组织机构，制定安全目标，严防各类安全事故发生。
44、深化安全教育，强化安全意识，工作人员上岗必须进行技术培训和安全教育，牢记安全第一宗旨。认真实施标准化施工作业，严肃施工纪律和劳动纪律，杜绝违章指挥与违章操作，保证安全防护设施投入，确保施工安全。七、文明施工确保施工现场符合现代化施工的客观要求，保证施工现场良好的施工环境和施工顺序，文明施工贯穿施工现场全过程。建立健全管理组织机构；健全制度；加强教育培训工作，提高全体职工文明素质；合理布置场地，实行目标管理；遵守社会规章制度，尊重当地民风民俗。遵守地方法规，乐于帮助群众，与政府、群众之间搞好关系。八、环境保护控制工程施工现场的各种粉尘、污水、及振动等对环境的污染和危害。设立环保管理机构；实行环保
45、目标责任制；加强检查和监控工作，环保工作要与文明施工现场管理一起检查，加强对污染方面的检查、监测；采取技术措施防止环境污染。附表1预应力砼空心板梁预制施工工艺框图整修底模绑扎底板钢筋钢筋下料安装侧模安装封端模绑扎顶板钢筋质量检查浇筑砼自然养护拆除模板养生整修侧模并涂脱模剂装修端模测量校正各部尺寸安装侧模振捣器制作砼试块安装内模整修内模并分段拼装成整体涂脱模剂安装波纹管检查波纹管定位 附表2后张法预应力空心梁张拉工艺框图安装工作锚安装千斤顶安装工具锚初 张 拉设计应力张拉持荷2分钟锚 固 顶锚卸载回程退楔切割钢绞线孔道压浆张拉准备记录伸长值记录核对伸长值记录核对伸长值记录核对伸长值核对楔片露量钢
46、绞线回缩量穿预应力钢绞线束预应力钢筋下料清洗管道张拉计算书（一）张拉程序低松弛力筋0 初应力10%con初应力20%con 100%con（二）压力表读数换算控制张拉力为1395Mpa：N100%=1395Mpa139mm24(跟)/1000=775.6KN1号千斤顶编号：091012 压力表编号：11071518千斤顶回归方程： y=0.0335x+0.11N10%时压力表读数为： 0.0335775.610%+0.11=2.7 MpaN20%时压力表读数为： 0.0335775.620%+0.11=5.3 MpaN100%时压力表读数为：0.0335775.6100%+0.11=26.1Mpa2号千斤顶编号：091013 压力表编号：110815129千斤顶回归方程： y=0.0334x-0.42N10%时压力表读数为： 0.0334775.610%-0.42=2.2 MpaN20%时压力表读数为： 0.0334775.620%-0.42=4.8 MapN100%时压力表读数为：0.0334775.6100%-0.42=25.5Mpa（三）伸长计算