雨水管道施工工艺

雨水管道施工 工艺 钢结构制作工艺流程车尿素生产工艺流程自动玻璃钢生产工艺2工艺纪律检查制度q345焊接工艺规程 本工程污水管，污水管管径为D=400mm，污水管为钢筋混凝土承插管。 1、污水管道施工工艺流程 测量放线?沟槽开挖及支护?管道基础施工?铺设管道?污水井施工?磅水(闭水)试验?沟槽回填 2、测量放线 根据设计施工图，测设管道中心线和污水井中心位置，设立中心桩。管道中心线和井中心位置经监理复核后方可在施工中使用。 根据施工管道直径大小，按规定的沟槽宽定出边线，开挖前用白粉划线来控制，在沟槽外井位置的两侧设置控制桩，并记录两桩至井中心的距离，以备校核。 3、沟槽开挖及支护 由于现场埋地各专业管道比较复杂，为保证其它管道不被损坏，管沟开挖采取人机结合的方法进行。施工时，要按照工区段的划分情况分段施工。开挖前，对地下管线情况进行实地调查、进行物探确定位置，不明处开挖探坑，确定好开挖尺度，由专人指挥、看护，不得损坏其它管线。 沟槽开挖时地下没有管线时采用挖掘机进行人工配合，青塔东里小区施工时采用人工开挖。沟槽深度较大的，采用一台以上挖掘机传递挖土，将开挖土方运离沟槽，对沟槽减少影响。挖土深度至2m时，应先距地面0.6,0.8m处撑头道支撑。管顶上的一道支撑与管顶净距不应小于20cm，离基础面上20cm处加设一道临时支撑。沟槽挖土与支撑应密切配合，做到随挖随撑。防止槽壁失稳而导致沟槽坍塌。挖掘机挖土时，应采取后退式挖土方法，严禁挖掘机进入未设支撑的区域内。 开挖的土方原则上就地堆置,但堆放高度不超过1.5m，堆置点离坑边距离不小于2m。施工时需计算沟槽边堆土对沟槽壁侧向土压力，以确保沟槽的稳定性。 igation data geological and hydrological conditions, road construction survey information, example), (a) the farm layout 1, general principles: from prevention and production considerations. Field layout for the production area, Office area, living area, production area, sewage waste treatment areas. 2, the principle of arrangement: according to the prevailing wind direction, the terrain and the direction followed by the living quarters, Office, production area, production and waste manure treatment areas. Such as terrain and wind direction is inconsistent, then the dominant wind direction (Figure 1). /(B) farm in the General layout planning: considering the chicken coop, hen house space, roads, sewage, fire prevention, prevention of disease and other factors. Featured designs of 100,000 scale chicken farms: 6 recommended sheds single row or double row arrangement, Dan Dong sheds for 16,000 sealed sheds, with four columns and four aisle three-tier ladder cage, installed air blower, water curtain, ventilation Windows, mechanical manure, mechanical, automatic water feed and automatic illumination system. Chicken Coop construction, reference provided the medium stage of feeding size (population 150,000), 16,000 chicken coop construction of Standardization (Figure 2, Figure 3, Figure 4). 1, Dan Dong sheds: West to East or South (or West) is about 15 degrees, 4、管道基础施工 管道基础施工与雨水管道施工相同。 5、铺设管道管节的预制、运输及现场堆放，管道铺设与雨水管道施工相同。 工程钢筋混凝土管须考虑管道防腐，防腐做法可采用防腐防水涂料。钢筋本 混凝土管内壁防腐涂料工程一般按“一底二中二面”要求施工，高压无气喷涂“一底三面”施工。施工前对基层的清洁、平整度、修补养护、含水率等质量指标进行验收，并作记录。认可后方可涂装施工。 6、附属构筑物、检查井等施工: 附属构筑物、检查井等施工与雨水管道施工相同。 7、磅水(闭水)试验 根据规范要求，污水管道必须逐节(两检查井之间的管道为一节)作磅水检验。 直径?800mm的管道可采用磅筒磅水，磅水前，接缝砂浆及混凝土应达到设计强度要求，并在管道预先充满水24h以上才能磅水。 磅水时按照要求水头高度先加水试磅20min，待水位稳定后才进行正式磅水，计算30min内水位下降的平均值。磅水水头为检验段上游管道内顶以上2m。 正式磅水时，应仔细检查每个接缝和沟管的渗漏情况，作好记录，若磅水不合格，应进行修补重磅，直至磅水合格为止。 8、沟槽回填 igation data geological and hydrological conditions, road construction survey information, example), (a) the farm layout 1, general principles: from prevention and production considerations. Field layout for the production area, Office area, living area, production area, sewage waste treatment areas. 2, the principle of arrangement: according to the prevailing wind direction, the terrain and the direction followed by the living quarters, Office, production area, production and waste manure treatment areas. Such as terrain and wind direction is inconsistent, then the dominant wind direction (Figure 1). /(B) farm in the General layout planning: considering the chicken coop, hen house space, roads, sewage, fire prevention, prevention of disease and other factors. Featured designs of 100,000 scale chicken farms: 6 recommended sheds single row or double row arrangement, Dan Dong sheds for 16,000 sealed sheds, with four columns and four aisle three-tier ladder cage, installed air blower, water curtain, ventilation Windows, mechanical manure, mechanical, automatic water feed and automatic illumination system. Chicken Coop construction, reference provided the medium stage of feeding size (population 150,000), 16,000 chicken coop construction of Standardization (Figure 2, Figure 3, Figure 4). 1, Dan Dong sheds: West to East or South (or West) is about 15 degrees, 污水管道沟槽回填与雨水管道相同。 igation data geological and hydrological conditions, road construction survey information, example), (a) the farm layout 1, general principles: from prevention and production considerations. Field layout for the production area, Office area, living area, production area, sewage waste treatment areas. 2, the principle of arrangement: according to the prevailing wind direction, the terrain and the direction followed by the living quarters, Office, production area, production and waste manure treatment areas. Such as terrain and wind direction is inconsistent, then the dominant wind direction (Figure 1). /(B) farm in the General layout planning: considering the chicken coop, hen house space, roads, sewage, fire prevention, prevention of disease and other factors. Featured designs of 100,000 scale chicken farms: 6 recommended sheds single row or double row arrangement, Dan Dong sheds for 16,000 sealed sheds, with four columns and four aisle three-tier ladder cage, installed air blower, water curtain, ventilation Windows, mechanical manure, mechanical, automatic water feed and automatic illumination system. Chicken Coop construction, reference provided the medium stage of feeding size (population 150,000), 16,000 chicken coop construction of Standardization (Figure 2, Figure 3, Figure 4). 1, Dan Dong sheds: West to East or South (or West) is about 15 degrees,