Pipeline construction and construction
1. The general provisions1.1. Before the pipe laying, the construction unit should prepare, construction organization design.1.2. Piping should be equipped in the undisturbed soil or through slot on post-processing backfill compacted foundation. When the pipe under the roadway, pipe roof covering should not be less than 0.7 m. When the pipe under the green way, pipe roof covering should not be less than 0.5 m.1.3. Construction, the maximum allowable covering on the top of the tube, should be stipulated in the design of pipe ring stiffness, on both sides of groove and check the condition of undisturbed soil, when found in accordance with the design requirements, may be required to change the design or take appropriate technical measures to ensure the bearing capacity. 1.4. When polyethylene pipes across the railway, should be set of reinforced concrete, steel and cast iron materials, such as the protection of the casing, the casing inside diameter should be greater than polyethylene pip...
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2016
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02
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19
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