消防水池抗渗混凝土工程施工方案

videoconference, Secretary of the provincial Committee of Xia Baolong stressed: this year is the "five water treatment" "357" timetables "for three years to resolve outstanding issues, obviously worked," victory of the year. The County's departments at all levels must firmly establish the "guanghui is gold and silver" green development concept, convinced that Castle is not relaxed, always maintaining strategic ability and strong determination to improve the environment, consistently playing well "five water treatment of" winning the war, ever-higher levels of comprehensive well-off society was built. (A) lay the sewage uphill battle. This year we will "river water quality improved at the county level, up to five" this basic objective grasp of pollution control that focus, with the focus on three things: a good job, "clear rivers" reaching the County created. Organization "look back" special inspection, the County garbage River, black and odorous River is "Dragnet" investigation, timely rectification of problems found in place firmly to prevent river pollution rebound. In accordance with the "one-stop strategy", improving the inferior five water quality monitoring stations work this year to ensure the Elimination of 1 provincial control, five water quality section 3 municipalities controlled deterioration, ensure the creation this year of "clear rivers" standards. Second, pay special attention to pollution-cutting construction of nanotubes. Intercepting nanotubes are the basis of pollution of water source engineering, engineering, matter of success or failure of water management. Urban sewage treatment, to improve "effluent from sewage treatment rate, running accuracy, compliance" requirement, speed up the town's support network construction, is focusing on nanotubes home "last meters" question. Domestic sewage treatment in rural areas, this year is the final year of the three-year action, determination to fight and the momentum around, ending the battle on which fully to ensure the realization of all County 648 formed village coverage. Also, be sure to attach importance to focus on rural domestic wastewater treatment facility operation and management, ensure that wastewater treatment facility up and running, role play, avoid the "Sun" problem. Third, pay special attention to the River Lake pond desilting operation. Provinces now have focused on pollution control of water go to "dig up mud", as the deepening water of this year's "plays". Next, to jump-start an investigation line touches work, implementation plan according to the priorities and the programme of work, in accordance with the "one river one policy" requires detailed cleaning, dredging plan, planning ahead of time cleaning out mud "way out", according to local conditions to do sludge, promote scientific resource utilization of silt and mud. (B) the heavy regulation of heavily polluting industries. Pollution of water must grab the source, wastewater is primarily the source of backward production capacity, increase the intensity of消防水池抗渗混凝土工程施工方案抗渗混凝土结构工程质量的优劣，除取决于抗渗等级的设计、材料的性质及配合成分以外，还取决于施工质量的好坏。因此，对施工中的各主要环节，如混凝土搅拌、运输、浇筑、振捣、养护等，均应严格遵循施工及验收规范和操作规程的规定进行施工。施工人员应树立保证工程质量的责任心，对施工质量要高标准、严要求，做到思想重视、组织严密、措施落实、施工精细。施工准备 1、编制施工组织设计，选择经济合理的施工方案，健全技术管理系统，制定技术措施，落实技术岗位责任制，做好技术交底，以及质量检验和评定的准备工作。2、进行原材料检验，各种原材料必须符合规定标准；备足材料，并妥善保管，按品种、规格分别堆放，注意防止骨料中掺混泥土等污物。3、将需用的工具、机械、设备配备齐全，并经检修试验后备用。4、进行抗渗混凝土的试配工作，根据设计抗渗等级，提高0.2N/mm2进行试配，在此基础上选定施工配合比，选定商品砼生产厂家。5、做好基坑排水的工作，要防止地面水流入基坑，以避免在带水或带泥浆的情况下，施工抗渗混凝土结构。模板1、板应平整，且拼缝严密不漏浆，并应有足够的刚度、强度，吸水性要小，因此该工程所用模板采用12mm厚塑石竹爽板，模板带采用80mmX60mm杉木方。 2、模板支撑采用钢管扣件支撑，立杆支撑和水平支撑的间距为80cm-100cm，顶端采用双扣件，以保证模板构造牢固稳定，满足拌和物的侧压和施工荷载并且装拆方便。3、固定模板采用12圆钢止水螺杆，在螺栓上加焊止水环三道，做到焊缝密实牢固，螺杆两端采用双蝴蝶扣和双螺帽紧固。（1）拆模后沿混凝土结构边缘将螺栓割断。此法将消耗所用螺栓。螺杆排距和上下的间距为500cm。（2）预埋套管加焊止水环做法套管采用钢管，其长度等于墙厚（或其长度加上两端垫木的厚度之和等于墙厚），兼具撑头作用，以保持模板之间的设计尺寸。止水环在套管上满焊严密。支模时在预埋套管中穿入对拉螺栓拉紧固定模板。拆模后将螺栓抽出，套管内以膨胀水泥砂浆封堵密实。套管两端有垫木的，拆模时连同垫木一并拆除，除密实封堵套管外，还应将两端垫木留下的凹坑用同样方法封实。（3）止水环撑头做法这种做法不但能保证结构厚度，还能延长渗水路线，增加对渗透水的阻力，适用于抗渗要求较高的结构。止水环与螺栓应满焊严密，两端止水环与两侧模板之间增加20mm厚垫木，拆模后除去垫木，沿止水环平面将螺栓割掉，凹坑以膨胀水泥砂浆封堵。钢筋钢筋相互间采取双丝反顺交叉对称绑扎牢固，增加钢筋笼的刚度。以防浇捣混凝土时，因碰撞、振动使绑扣松散、钢筋移位，造成露筋。绑扎钢筋时，按设计规定留足保护层，不得有负误差。留设保护层，用相同配合比的细石混凝土或水泥砂浆制成垫块，将钢筋垫起，严禁以钢筋垫钢筋，或将钢筋用铁钉、铅丝直接固定在模板上。钢筋及铅丝均不得接触模板，若采用铁马凳架设钢筋时，在不能取掉的情况下，应在铁马凳上加焊止水环，防止水沿铁马凳渗入混凝土结构。当钢筋排列稠密，以致影响混凝土正常浇筑时，可同时设计人员协商，采取措施，以保证混凝土的浇筑质量。混凝土采用 商品砼，标号按设计要求，并严格按试配送试验所选定的配合比配制。混凝土运输混凝土在运输过程中要防止产生离析现象及坍落度和含气里的损失，同时要防止漏浆。拌好的混凝土要及时浇筑，常温下应于半小时运至现场，于初凝前浇筑完毕。运送距离较远或气温较高时，可渗入缓凝型减水剂。浇筑前发生显著泌水离析现象时，应加入适量的原水灰比的水泥浆复拌均匀，方可浇筑。混凝土浇筑和振捣浇筑前，清除模板内的积水、木屑、铁钉等杂物，并以水湿润模板。使用钢模应保持其表面清洁无浮浆。砼的现场浇筑采用泵送。浇筑混凝土的自落高度不得超过1.5m，因此决定使用串筒、溜管等工具进行浇筑，以防产生石子堆积，影响质量。在结构中若有密集管群，以及预埋件或钢筋稠密之处，不易使混凝土浇捣密实时，应改用相同抗渗等级的细石混凝土进行浇筑，以保证质量。在浇筑大体积结构中，遇有预埋大管径套管或面积较大的金属板时，其下部的倒三角形区域不易浇捣密实而形成空隙，造成漏水，为此，可在管底或金属板上预先留置浇筑振捣孔，以利浇捣和排气，浇筑后，再将孔不焊严密。混凝土浇筑应分层，每层厚度不宜超过30-40cm，竖墙每层次振捣深度为40cm-50cm。顶底板用平板振动器加振一次。相邻两层浇筑时间间隔不应超过2h。抗渗混凝土采用机械振捣。机械振捣能产生振幅不大、频率较高的振动，使骨料间的磨擦力、