4-2、盖梁施工交底(剪力鞘法).doc
《4-2、盖梁施工交底(剪力鞘法).doc》由会员分享,可在线阅读,更多相关《4-2、盖梁施工交底(剪力鞘法).doc(14页珍藏版)》请在三一文库上搜索。
1、anti-concentrated immune period full implementation whole village advance work, participate in whole village advance work concentrated immune of village level epidemic prevention member per person daily grants 100 Yuan, district animal health supervision by will organization personnel for immune den
2、sity, immune archives, situation on Township, and village and the farmers for has field check and assessment, found problem, timely processing; while, tie good Township implementation good the control measures, ensure major animal blight control work in place. Four, there is a problem (a) prevalence
3、 of animal diseases is complex I is located in the citys political, economic and cultural center, is the flow of livestock and poultry and its products distribution center, complex animal epidemic diseases, pathogens, mobility. One is convenient, cross-province and cross State and municipal transpor
4、tation of livestock and poultry and its products become the norm, cross county, imported cases are on the rise. Second, higher risk major animal disease outbreaks occur, from pathogen surveillance and epidemiological investigations in recent years, foot and mouth disease and highly pathogenic avian
5、influenza, highly pathogenic blue-ear pig disease hidden large outbreaks, goat pox. Third, free-range livestock farmers share in the autonomous region, controlling and cleaning measures are difficult to implement, and porcin circle virus, Parvovirus, Pseudorabies pathogen distribution and disease pa
6、thogen mixed infection atypical, more prominent. Four rabies, tuberculosis in dairy cows and other zoonotic diseases are on the rise, studies show that 70% animal diseases can be transmitted to humans, 75% of human emerging infectious diseases from animal or animal-derived foods, does not enhance th
7、e prevention and control of animal epidemics, would seriously endanger public health and safety. (B) animal disease control, challenging folks . Constraints have become more prominent. (C) to strengthen the team construction of present, my basic veterinary facilities and team weaknesses, staff short
8、age, low technology, social services are still not high, animal husbandry and veterinary technicians and veterinary technical services and not adapted to management needs, live animal cross-district allocation and market access mechanism is not perfect, animal disease control still faces many diffic
9、ulties and problems. (D) the coordination segment of the sector needs to be strengthened the township (town) awareness and organization in place, with no support among community cadres, not fulfilling publicity and mobilization responsibilities farmers hear from immunization, prevention of sub is a
10、farmer who is not at home, cant let epidemic prevention. 2016 and 1 to complete the major animal diseases by higher authorities compulsory immunization task. 2, complete antibody superior monitoring and pathogen monitoring tasks. 3, complete disease epidemiology supervisor tasks. 4, animal disease m
11、ortality survey tasks assigned by the superior. 5, serum sample tasks are assigned to the Township, incorporated into the Regional Bureau of animal husbandry and veterinary medicine annual target assessment within the framework of the animal husbandry and veterinary station in villages and towns. 6,
12、 complete, update the Township and village veterinary cold chain facilities. 7, adoption and implementation of animal disease control medium-and long-term planning. 8, develop village-level epidemic prevention staff appraisal management and supervise钢筋混凝土盖梁施工技术交底(剪力销法)天津一期 田志刚一、 施工准备(一) 作业条件1、 墩柱业已施
13、工完毕,强度已经允许下一步施工。浇筑墩柱时沿顺桥向方向在墩柱侧面离柱顶1m处预留孔道(孔道要穿过墩柱),以用来架设工字钢。2、 平整场地:将墩柱下面的场地整平、压实以便于施工,便于走车和放东西。3、定点放线:用全站仪定出墩柱的中心,并复核墩顶标高。4、 据规范及设计要求校核混凝土的配合比,做完混凝土的配合比试配工作。原材料的复试、进行技术交底、台称经校准、规定合格、准备好混凝土试模。(二)材质要求1、 水泥:选用水泥时应以能使所配制的混凝土强度达到要求、收缩小、和易性好和节约水泥为原则。水泥的生产厂家、型号、强度等级应符合设计要求,水泥的质量应符合现行水泥标准,并作抽样检测。检测水泥的出厂日期
14、、进场日期,检测水泥的初凝时间和终凝时间。2、 砂、石子:根据规范规定桥涵混凝土的细骨料应采用级配良好、质地坚硬、颗粒洁净、粒径小于5mm的河砂。砂的细度模数控制在2.92.6之间。具体规定见下列表格:表1砂的分类砂组粗砂中砂细砂细度模数3.73.13.02.32.21.6注:对于用高强泵送混凝土用砂宜选用中砂,细度模数为2.92.6。砂的级配应符合表2中任何一个级配区所规定的级配范围,具体情况详见下表规定:表2砂的分区及级配范围标准筛筛孔尺寸(mm)级配区标准筛筛孔尺寸(mm)级配区区区区区区区累计筛余(%)累计筛余(%)10.000000.638571704140165.001001001
15、000.3159580927085552.503552501500.161009010090100901.2565355010250砂中的杂质含量详见下表:表3沙中杂质的最大含量项目C30的混凝土C30的混凝土含泥量(%)35其中泥块含量(%)1.02.0云母含量(%)2轻物质含量(%)1硫化物及硫酸盐折算为SO3(%)1有机质含量(用比色法试验)颜色不应深于标准色,如深于标准色,应以水泥沙浆进行抗压强度对比试验,加以复核。粗骨料的最大粒径不得超过结构最小边尺寸的1/4和钢筋最小净距的3/4;在两层或多层密布钢筋结构中,不得超过钢筋最小净距的1/2,同时最大粒径不得超过100mm。用混凝土泵运
16、送混凝土时的粗骨料最大粒径除应符合上述规定外,对碎石不宜超过输送管径的1/3;对于卵石不宜超过输送管径的1/2.5,同时应符合混凝土泵制造厂的规定。粗骨料的技术要求及有害物质的含量见表4和表5。表4粗骨料的技术要求项目混凝土强度等级C55C40C35C30Ah/tv-混凝土配制、输送及浇筑的容许最小速度A- 浇筑的面积h-浇筑层的厚度t-所用水泥的初凝时间 如混凝土的配制、输送及浇筑需要时间较长,则应符合: VAh/t-t0t-凝土配制输送及浇筑需要时间大体积混凝土应参照下述方法控制混凝土水化热温度1. 用改善骨料级配、降低水灰比,掺入混合料,掺入外加剂,掺入片石等方法减少水泥的用量;2. 采
17、用水化热低的大坝水泥,矿渣水泥,粉煤灰水泥或低标号水泥3. 减少浇筑层厚度,加快混凝土散热速度。4. 混凝土用料应避免日光曝晒,以降低用料的初始温度5. 在混凝土内埋设冷却管道通水冷却。混凝土入模时的坍落度参考表序号结构类别坍落度(cm)1小型预制块及便于浇筑振捣的结构0-22桥涵、基础、墩、台等无筋或少筋的结构1-33普通配筋率的钢筋的混凝土结构3-54配筋较密、断面较小的钢筋混凝土结构5-75配筋极密、断面高而狭的钢筋混凝土结构7-9(1)、从高处向模板内倾卸混凝土时,其自由倾落高度一般不宜超过2M,以不发生离析为度。否则应通过串筒、溜管或振动管、槽等设施卸落混凝土。当倾落高度超过10M时
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 施工 交底 剪力
链接地址:https://www.31doc.com/p-2360590.html