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1、縣道329線南安至官橋段公路擴建工程后張法預應力空心板梁預制施工組織設計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 educational practice activity in the citys im2、plementation 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 County, the county to carry out the ed3、ucation 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, conscientiously implement the spirit of ge4、neral 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 the look in the mirror, dress up, wash5、 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, promote transformation across effort6、s, 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 style of close ties with the masses law7、, 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 and cadres to further improve their th8、inking 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 construction of a powerful force of the c9、ounty 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 community, village, non-public economic org10、anizations, 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 focus on outstanding catch to directly11、 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 contact to strengthen, and the majorit12、y 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 emphasis on leadership, pay more attent13、ion 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 cohesion driven, more strict requiremen14、ts 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 centralized solve outstanding problems a15、sked 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 the masses, pay attention to solve pra16、ctical 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 implementation of the requirements of re17、al 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 engage in image project, political projec18、t, 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 problem of law enforcement and superv19、ision 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 and leading cadres to solve key does n20、ottheir 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 competitive strength. Concentrated manpower21、, 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, the pursuit of stability and developme22、nt 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 principle, in the framework of national 23、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, ensure that the value of state-owned24、 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 competition, the sense of urgency, improv25、e 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 high-quality professional management t26、eam, 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 about social support the development 27、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 promote leapfrog development.15后張法預應力空心板梁預制28、一、編制依據1、設計圖紙；2、公路工程技術規范JTJB01-20033、公路橋涵施工技術規范JTG/T F5020114、公路工程質量評定標準(JTJ F80/1-2004)等5、鋼筋混凝土用熱軋帶肋鋼筋（GB/1499.1-2008）6、預應力筋用錨具、夾具和聯結器（GB/T14370-2000）7、預應力混凝土用鋼絞線（GB/T5224-2003）8、公路橋梁板式橡膠支座（JT/T663-2006）二、工程概況YK8+048.48小橋與路線交角105度，采用1-10m后張法預應力砼空心板，梁高60cm。橋面鋪裝為12cm現澆防水混凝土。在兩側橋臺處設40型伸縮縫。下部結構為U型臺，擴大基礎29、，橋梁位于曲線上。三、施工方案(一) 空心板梁預制施工工藝底模清洗、涂脫模劑在底模上綁扎底板、腹板鋼筋安裝預應力管道安裝側模及端模綁扎頂板鋼筋澆筑砼養生拆模養生張拉壓漿封端移梁至存梁場。(二) 空心板梁預制施工方法（1） 鋼筋加工及安裝鋼筋下料、加工、定位、綁扎、焊接嚴格按照規范及設計圖紙進行。所有鋼筋交叉點均必須雙絲綁扎結實，必要時可用點焊焊牢。鋼筋綁扎、安裝時應準確定位，伸縮縫及防撞護欄等預埋筋、翼緣板鋼筋、端部橫向連接筋必須使用鋼筋定位輔助措施進行定位；端隔板鋼筋必須確保高低、間距一致，符合設計要求，無漏筋現象，也可采取提前制作，整體安裝；與波紋管等干擾的鋼筋嚴禁切斷，應采取合理措施避開30、。鋼筋表面保持清潔無油漬、泥土、鐵銹等。鋼筋采用調直機拉直時，級鋼筋伸長率不得大于2%，調直后的鋼筋用斷線鉗下料；直徑為10mm以上的、級鋼筋采用鋼筋切斷機下料。鋼筋直徑小于12mm時采用綁扎，當鋼筋直徑大于或等于12mm時采用搭接焊，焊接質量符合規范要求，搭接焊雙面焊搭接5倍d,單面焊搭接10倍d（d指鋼筋直徑）。箍筋的彎曲由人工操作，制作時嚴格控制幾何尺寸和彎曲角度，以免影響骨架的外形尺寸和形狀。鋼筋成品與半成品分開堆放，并標識齊全。鋼筋施工時先綁扎底板和腹板鋼筋，再安裝頂板鋼筋。鋼筋骨架綁扎時，在主筋上用石筆畫出箍筋間距，然后綁扎箍筋，制成的骨架具有足夠的剛度和穩定性。底板鋼筋保護層采用31、與設計保護層厚度等厚的梅花形高強度砂漿墊塊，確保墊塊能承受足夠壓力而不破碎，綁扎牢固可靠，縱橫向間距均不得大于0.8m，梁底位置不得大于0.5m，確保每平方墊塊數量不少于4塊。頂板鋼筋綁扎時，保證預埋件位置的準確性。為防止芯模上浮，將固定芯模的箍筋與底板筋焊接。并且在側模頂端間隔60cm設置固定橫桿的扣環，在橫桿與主筋之間支墊混凝土保護層墊塊，以防止鋼筋整體上浮，進而達到防止芯模上浮的效果（2） 波紋管的預埋在鋼筋綁扎過程中，應根據設計精確固定波紋管和錨墊板位置，波紋管U型定位鋼筋必須敷設，每50cm設置一道，不得缺省。波紋管的連接應采用管長20cmm的大一號同型波紋管作接頭管，接頭長度不低于32、規范要求，并在波紋管連接處用密封膠帶封口，確保不漏漿。為保證預留孔道位置的精確，端模板應與側模和底模緊密貼合，并與孔道軸線垂直。孔道管固定處應注明坐標位置，錨墊板還應編上號碼，以便鋼絞線布置時對號入座。鋼筋焊接時，應做好金屬波紋管的保護工作，如在管上覆蓋濕布，以防焊渣灼穿管壁發生漏漿。鋼絞線下料時要通過計算確定下料長度，要保證張拉的工作長度，下料應在加工棚內進行，切斷采用切斷機或砂輪鋸，不得采用電弧切割，同時注意安全，防止鋼絞線在下料時傷人。圓形波紋管在澆筑前應穿入比波紋管小1cm的塑料軟管，防止波紋管擠壓變形、漏漿，確保在進行預應力施工時的質量。塑料襯管應在混凝土初凝后及時抽出。（3） 模板33、施工梁體模板在加工廠加工完成運到現場后，放在存梁場位置，按順序分別編號。安裝采用人工拼裝。單體組拼時嚴格按順序拼裝，不得錯亂，裝拆時應注意以下事項：a在整個施工過程中要始終保持模板的完好狀態，認真維修保養。b在吊運過程中，注意避免碰撞。c首次使用時采用鋼絲刷或角磨機清除銹垢，然后涂刷脫模劑，做到均勻、不遺漏。d裝拆時檢查接縫處止漿墊的完好情況，如發現損壞及時更換，以保證接縫嚴密、不漏漿。e安拆精度要符合規范要求。在安裝過程中及時對各部分模板進行精度控制，安裝完畢后進行全面檢查，超出容許偏差及時糾正。（4） 砼澆筑澆筑前應嚴格檢查泄水孔、伸縮縫、護欄、支座等附屬設施的預埋件是否齊全。鋼筋和模板安34、裝完畢，經監理工程師檢查驗收并簽認后進行砼的澆筑。砼在拌和站集中拌制，經試驗確定摻加適量高效減水劑，水平運輸采用砼罐車車運輸，龍門吊提升入模。振搗以附著式振搗為主，插入振搗為輔。澆筑采用水平分層，斜向分段的連續澆筑方式，從梁的一端順序向另一端推進。分段長度3m5m，分層下料厚度不超過25cm，上層砼必須在下層砼初凝之前覆蓋，以保證接縫處砼的良好接合。澆筑到頂板后，及時整平、抹面收漿、拉毛。澆筑過程中，經常用通孔器疏通波紋管，保證管道暢通。砼澆筑施工注意事項：a澆筑前對所有操作人員進行詳細的技術交底，并對模板和鋼筋的穩固性以及砼的拌和、運輸、澆筑系統所需的機具設備是否齊全完好進行一次全面檢查，符35、合要求后方可施工。b澆筑時，下料均勻、連續，不要集中猛投而產生砼的阻塞。在鋼筋密集處短時開動側振或插入式振搗器以輔助下料。c施工中隨時注意檢查模板、鋼筋及各種預埋件的位置和穩固情況，發現問題及時處理。d澆筑過程中隨時檢查砼的坍落度和干硬性，嚴格控制水灰比，前后臺密切配合，以保證砼的質量。e每片梁除留足標準養護試件外，另制作隨梁同條件養護的試件3組，做為拆模、張拉等工序的強度控制依據。f認真填寫砼澆筑施工原始記錄。（5） 養生、拆模梁體砼澆筑完成后，立即用帆布覆蓋，蒸汽養生。同體養生試塊強度達到20MPa后即可進行拆模，然后繼續覆蓋養生。（6） 預應力鋼鉸線的張拉及壓漿（工藝流程詳見附表2）a.36、梁的砼強度達到設計強度90%，且混凝土齡期不小于5d后，方可張拉。預應力鋼束采用兩端同時張拉，錨下控制應力為0.75fpk=1395Mpa。預施應力采用控制應力和伸長值(應變)雙控法、互相校核。本合同段選用YCW150型千斤頂，按規范經校核后使用。嚴格按設計要求進行預應力筋的下料、編束、穿束。每組鋼束采用兩端張拉，對稱、均衡進行。張拉順序為50%左N1100%右N1100%左N1。張拉過程中繪制張拉管理曲線圖，對張拉全過程進行監控，確保有效應力達到設計的100。當實際伸長值與理論伸長值之差大于6時，立即停止張拉，查明原因并采取措施調整后，再繼續張拉。發生滑絲或斷絲超過規范要求時，進行更換后重新37、張拉。b.預應力鋼束張拉程序010（初張拉）20100（持荷2分鐘錨固）。預應力鋼束張拉完成后，測定回縮量和錨具變形量，檢查是否有斷絲、滑絲現象，在征得監理工程師認可后割斷露頭。c.孔道壓漿、封端所有鋼鉸線張拉錨固完成后，進行孔道壓漿。壓漿采用活塞式壓漿泵，灰漿拌制采用灰漿攪拌機。在壓漿前先用高壓水沖洗孔道，然后用空氣壓縮機吹干孔道內的積水。再采用壓漿泵壓入水泥漿，水灰比選用0.40.5，灰漿摻加高效減水劑及膨脹劑，以0.40.7MPa的恒壓，一次注漿完畢，壓漿完成后及時封錨。為了確保壓漿、封錨質量，防止壓漿后灰漿收縮出現空隙，在施工時，嚴格控制水泥漿的水灰比及壓漿壓力并做好壓漿記錄。壓漿操作38、程序如下清洗孔道：錨外多余預應力筋割掉后，觀察確無滑絲等現象后，先用高壓水沖冼孔道，后用高壓風吹干孔道。安裝壓漿器具：依次安裝密封蓋、壓漿嘴、壓漿閥，并將壓漿管道與壓漿機、進漿閥連接在一起，使進漿閥和出漿閥為開通狀態。拌制灰漿：在拌和機啟動后，先加水，后倒入水泥和減水劑和膨脹劑，拌和時間不少于3分鐘。啟動壓漿泵開始壓漿，待出漿閥溢出的水泥漿變成原漿時，關閉出漿閥，并保持0.5Mpa的壓力持壓2分鐘，然后關閉進漿閥，最后壓漿泵回漿，卸掉壓漿管。拆卸壓漿器具：待灰漿初凝后，拆除壓漿閥、壓漿嘴、密封蓋等，并清洗干凈以備下次使用。四、工程質量通病及防治措施（一）鋼筋工程1）表面銹蝕預防措施：鋼筋原料存39、放在倉庫或料棚內，保持地面干燥，鋼筋存放離地面距離300以上；先進庫先使用，盡量縮短庫存時間。治理方法紅褐色銹斑的清除，可采用手工或機械方法除銹，盤條細鋼筋可通過冷拉或調直過程除銹。倉庫設專人驗收入庫鋼筋，庫內劃分不同鋼筋堆放區域，每堆鋼筋均立標簽掛標牌，標明品種、等級、直徑、技術證明編號及整批數量等。2）鋼筋骨架外形尺寸不準綁扎時將多根鋼筋端部對齊；防止鋼筋綁扎偏斜或骨架扭曲。將導致骨架外形尺寸不準的個別鋼筋松綁，重新安裝綁扎。3）、保護層不準預防措施檢查墊塊厚度是否準確，數量是否足夠。采取措施防止鋼筋在混凝土振搗時移位。澆筑砼時嚴防振搗器碰撞鋼筋或模板，以防保護層墊塊移動。澆注混凝土前，仔40、細檢查鋼筋保護層厚度。(二)混凝土工程1）麻面預防措施：a) 模板面清理干凈，不粘干硬水泥砂漿等雜物。b) 鋼模板脫模劑要涂刷均勻，不漏刷。c) 混凝土嚴格按操作規程分層均勻振搗密實，嚴防漏振；每層混凝土均應振搗至氣泡排除為止。2）露筋預防措施：混凝土澆注前，檢查鋼筋位置和保護層厚度是否準確，發現問題及時修整。固定好墊塊以保證混凝土保護層厚度。鋼筋密集時，選配適當的石子。嚴禁振搗棒撞擊鋼筋以防鋼筋移位。正確掌握拆模時間，防止過早拆模。操作時不得踩踏鋼筋，盡量設置施工腳手架。治理方法將外露鋼筋上的混凝土殘渣和鐵銹清理干凈，用水濕潤，再用1：2或1：2.5水泥砂漿抹壓平整；如露筋較深，將薄弱混凝土41、剔除，沖刷干凈濕潤，用高一級的細石混凝土搗實，認真養護。3）蜂窩預防措施混凝土攪拌時嚴格控制配合比。混凝土拌合均勻，顏色一致。混凝土自由傾落高度不超過2m。混凝土分層搗固。插入式振搗器的移動間距不大于其作用半徑的1.5倍。掌握好每點振搗時間。澆注混凝土時，經常觀察模板、對拉等情況，發現問題及時處理。4）混凝土收縮裂縫預防措施配制混凝土時，嚴格控制水灰比和水泥用量，選擇級配良好的石子，減小空隙率和砂率，澆注時搗固密實以減小收縮量。澆注混凝土前，將基層和模板澆水濕透。混凝土澆注后，對裸露表面及時用潮濕材料覆蓋，認真養護，防止強風化吹襲和烈日曝曬。在氣溫高、溫度低及風速大時澆注混凝土，及早進行噴水養42、護，使其保持濕潤。夏季應適當延長養護時間，以提高抗裂能力。冬季應適當延長保溫和脫模時間，使緩慢降溫，以防溫度驟變，溫差過大引起裂縫。基礎部分早回填保濕保溫，減少溫度收縮裂縫。治理方法如混凝土仍保持塑性，可采取及時壓抹一遍或重新振搗的辦法來消除，再加強覆蓋養護。如混凝土已硬化，可向裂縫內裝入干水泥粉，然后加水濕潤或在表面抹薄層高標號水泥砂漿。五、確保工程質量和工期的措施1. 確保工程質量的主要措施建立項目質量管理機構，樹立質量意識，健全保證體系，明確創優目標，落實質量職責，強化質量意識，健全規章制度。 嚴把材料采購、進場檢驗關。進入工地的所有原材料，嚴格從符合設計要求，經過認真驗收，從材料的外觀43、質量、數量、品種等方面檢查是否符合施工技術規范和設計規定的要求。 加強內業檢查，做到內外業同步完成，工程竣工后，保證提供資料齊全、記錄準確、圖文并貌的全套竣工資料。2. 確保工期的措施在施工中不斷優化施工組織和施工方案，合理調配人員設備，應用先進施工方法，精心安排保證工程按計劃進度順利進行。 強化施工調度指揮與協調工作，超前布局謀勢，密切監控落實，及時解決問題，避免工期延誤。按實際進展情況及時對計劃安排進行修訂，并適時掀起生產高潮，加快施工進度。六、安全保證措施設置安全管理組織機構，制定安全目標，嚴防各類安全事故發生。深化安全教育，強化安全意識，工作人員上崗必須進行技術培訓和安全教育，牢記安全44、第一宗旨。認真實施標準化施工作業，嚴肅施工紀律和勞動紀律，杜絕違章指揮與違章操作，保證安全防護設施投入，確保施工安全。七、文明施工確保施工現場符合現代化施工的客觀要求，保證施工現場良好的施工環境和施工順序，文明施工貫穿施工現場全過程。建立健全管理組織機構；健全制度；加強教育培訓工作，提高全體職工文明素質；合理布置場地，實行目標管理；遵守社會規章制度，尊重當地民風民俗。遵守地方法規，樂于幫助群眾，與政府、群眾之間搞好關系。八、環境保護控制工程施工現場的各種粉塵、污水、及振動等對環境的污染和危害。設立環保管理機構；實行環保目標責任制；加強檢查和監控工作，環保工作要與文明施工現場管理一起檢查，加強對45、污染方面的檢查、監測；采取技術措施防止環境污染。附表1預應力砼空心板梁預制施工工藝框圖整修底模綁扎底板鋼筋鋼筋下料安裝側模安裝封端模綁扎頂板鋼筋質量檢查澆筑砼自然養護拆除模板養生整修側模并涂脫模劑裝修端模測量校正各部尺寸安裝側模振搗器制作砼試塊安裝內模整修內模并分段拼裝成整體涂脫模劑安裝波紋管檢查波紋管定位 附表2后張法預應力空心梁張拉工藝框圖安裝工作錨安裝千斤頂安裝工具錨初 張 拉設計應力張拉持荷2分鐘錨 固 頂錨卸載回程退楔切割鋼絞線孔道壓漿張拉準備記錄伸長值記錄核對伸長值記錄核對伸長值記錄核對伸長值核對楔片露量鋼絞線回縮量穿預應力鋼絞線束預應力鋼筋下料清洗管道張拉計算書（一）張拉程序低松46、弛力筋0 初應力10%con初應力20%con 100%con（二）壓力表讀數換算控制張拉力為1395Mpa：N100%=1395Mpa139mm24(跟)/1000=775.6KN1號千斤頂編號：091012 壓力表編號：11071518千斤頂回歸方程： y=0.0335x+0.11N10%時壓力表讀數為： 0.0335775.610%+0.11=2.7 MpaN20%時壓力表讀數為： 0.0335775.620%+0.11=5.3 MpaN100%時壓力表讀數為：0.0335775.6100%+0.11=26.1Mpa2號千斤頂編號：091013 壓力表編號：110815129千斤頂回歸方程： y=0.0334x-0.42N10%時壓力表讀數為： 0.0334775.610%-0.42=2.2 MpaN20%時壓力表讀數為： 0.0334775.620%-0.42=4.8 MapN100%時壓力表讀數為：0.0334775.6100%-0.42=25.5Mpa（三）伸長計算