管道安装作业指导书.pdf

管 道 敷 设
一、沟槽开挖
1、管道沟槽的开挖应按照图纸所提坐标位置和标高进行，不允许挖到设计标高以下。
2、管槽施工开挖前要在距堑顶10m以外设临时截、排水沟，沟内挖的土在路堑与沟之间修成土台并夯实，台顶筑成2%倾向截水沟的横坡。临时排水设施尽量与永久性排水设施相结合，把水及时排到自然沟，避免对路基产生危害。
3、沟槽的开挖边坡应按图纸要求。
4、开挖时，若遇到雨季或流砂，可酌情加大边坡或用挡板支撑。
5、管道基础在开挖时发现人工土、淤泥、或流砂，必须同时设计单位进行处理。
6、沟槽的开挖底宽须满足管外壁与沟底边线
Pipe laying
1, trench excavation
1, pipe trench excavation shall be made in accordance with coordinates of the location and elevation drawings were not allowed to excavate the following design elevation.
2, ducts before excavation cut in from the top 10m to peripheral temporary cut, drain, ditch digging the soil in the cutting and communication platform between the marble and soil compaction, built into the top 2% of Taiwan tend to ditch the cross-sectional slope. Permanent temporary drainage facilities, drainage facilities as far as possible with the combination of the water discharged to the natural channel in time to avoid harm to the subgrade.
3, trench excavation slopes should be drawings.
4, excavation, when the rainy season or the flow of sand, can increase the slope or baffle appropriate support.
5, when the pipe was found in the excavation based on artificial soil, silt, or sand, must also design units for processing.
6, the excavation trench bottom width to satisfy the exterior and ditch edges