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排水工程雨水管施工技术交底.doc

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交底内容:
1.  本工程雨水管材的选用:管径Ф600mm~Ф1200mm采用玻璃钢夹砂管(RPM)(覆土≤4.0m)或钢筋混凝土管(覆土>4.0m);管径Ф1350mm~Ф1800mm采用钢筋混凝土管;管径>Ф1800mm采用相当断面钢筋混凝土箱涵。
2.  管道基础:
(1).  玻璃钢夹砂管(RPM)的基础做法:当土壤承载力为80~100Kpa和非岩石时,采用原状土作为基础;当土壤承载力为50~70Kpa时,采用经夯实后的原状土作为基础,夯实密度应达到95%;当沟底遇到岩石、卵石、硬质土、软的膨胀土、不规则碎石块及浸泡土质而不宜作沟底基础时,应挖除后做人工基础,基础厚度应为0.3~0.5倍管径,且不得小于150mm。
(2).  钢筋混凝土管基础做法:>Ф1200mm~Ф1800mm钢筋混凝土管基座做法按国家建筑标准设计《给排水标准图集》(2002)S2(下)95S516执行。
3.  管道接口:>Ф1200mm~Ф1800mmRPM管采用双‘O’型橡胶接口;管径Ф1200mm~Ф1800mm钢筋混凝土管采用企口式,接口采用‘q’形橡胶圈。
4.  管道基础施工前应修整槽底,复核标高,清除淤泥与碎石,若出现超挖,则采用砂砾回填,并人工夯压密实,不得使用土回填。
5.  管道基础垫层(300mm厚砂夹石和150mm厚中粗砂)施工,应做到夯实紧密、表面平整。管道基础在接口部位,应挖预留凹槽,以便于接口操作。凹槽在接口完成后,随即用砂填实。
6.  在管道下管前应检查和修整沟(槽)底标高和管道基础的质量,经监理验收符合施工规范及设计要求后,才允许下管。每根管子及每个配件在入沟之前应除去内部杂物,检查有无裂缝、碰伤、剥落及其他缺陷,不符合质量要求的,不得使用。
根据各种管径、重量采用人工或机械下管。下管要有专人负责指挥,切实注意安全。下管时始终保持管身平衡均匀溜放至沟槽内,严禁将管材由沟槽边翻滚入槽内。对于钢筋混凝土管,一定要根据管子的重量和直径选择合适的柔性悬带或绳带,确认起吊机械性能良
Cards on the table contents:
1. This project used water pipe: diameter Ф600mm ~ Ф1200mm with Fiberglass Reinforced Plastic Pipe (RPM) (casing ≤ 4.0m) or reinforced concrete pipe (casing> 4.0m); diameter Ф1350mm ~ Ф1800mm reinforced concrete pipe; tube Path> Ф1800mm with considerable cross section of reinforced concrete box culvert.
2. Pipe Foundation:
(1). Fiberglass Reinforced Plastic Pipe (RPM) based approach: when the soil bearing capacity is 80 ~ 100Kpa and non-rock, the use of undisturbed soil as a base; when the soil bearing capacity is 50 ~ 70Kpa, the use of the original compacted soil as a foundation, compaction to 95%; when the bottom was encountered rock, gravel, hard soil, soft soil, irregular stone blocks and soak the soil and are unsuitable for ditch foundation, excavation should be done after artificial basis, based on thickness of 0.3 to 0.5 times the diameter, and shall not be less than 150mm.
(2). Reinforced concrete foundation approach:> Ф1200mm ~ Ф1800mm practice of reinforced concrete base according to the National Building Standard Design, "Water and Wastewater Standard Atlas" (2002) S2 (under) 95S516 implementation.
3. Pipeline Interface:> Ф1200mm ~ Ф1800mmRPM tube with double 'O' rubber interface; diameter reinforced concrete pipe Ф1200mm ~ Ф1800mm mouth with enterprise, interface with 'q' shaped rubber ring.
4. Pipeline construction before finishing bottom of the tank foundation, review level, clear the mud and gravel, if there overbreak, then backfill with gravel and compacting compaction manually, not use soil backfill.
5. Pipeline based bedding (300mm thick 150mm thick sand with stone and coarse sand) construction, should be tightly compacted, smooth surface. Pipeline based on the interface area, should be reserved dug grooves in order to interface operation. Grooves in the interface is complete, then filled with real sand.
6. In the pipeline before the next inspection and repair of pipe trench (groove) bottom elevation and channel-based quality inspection by the Commissioner consistent with the construction specifications and design requirements, are allowed under control. Each pipe and each fitting into the ditch before the removal of internal debris, check for cracks, bumps, spalling and other defects, does not meet the quality requirements, shall not be used.
According to various diameters, the weight under control by manual or mechanical. Be specifically responsible for directing the next tube, effectively safety. Always keep under control when sliding up the tube body to the groove evenly balanced, the forbidden side of the roll pipe into the tank by the groove. For reinforced concrete pipe must be based on the weight and diameter of pipe select the appropriate tape or rope hanging flexible, good mechanical properties confirm lifting
 

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