泉源:/ 宣布时间:日期:2024-03-25 0


1. When excavating, if a gas warning tape is dug, it indicates that there is a gas pipeline located 0.3 to 0.5 meters below, which serves as a warning and protection. 2. Tracing effect. When searching for buried gas pipelines, finding the warning tape indicates that the pipeline has been found, playing a tracing role. 3. The current warning is equipped with a tracer line, which uses testing instruments to accurately locate the pipeline without excavation.


Key points for burying warning tapes for gas pipelines


1. Trench excavation.


(1) The excavation of concrete pavement and asphalt pavement should be done using a cutting machine.


(2) The pipeline trench should be excavated according to the plane position and elevation specified in the design. When manual excavation is used and there is no groundwater, the reserved value at the bottom of the trench should be 0.05-0.10m; Before pipeline installation, the bottom should be manually cleaned to the design elevation.


(3) The width and working dimensions of the trench bottom should be determined based on the actual site conditions and pipeline laying methods.


(4) Partial over excavation should be backfilled and compacted. When there is no groundwater at the bottom of the ditch, if the over excavation is within 0.15m, the original soil can be used for backfilling; If the over excavation is above 0.15, lime soil treatment can be used. When there is groundwater or a large amount of water at the bottom of the ditch, graded sand or natural sand should be used to backfill to the elevation. After backfilling the over excavated part, the compactness should be close to the compactness of the natural soil in the original foundation.


(5) In areas with collapsible loess, it is not advisable to carry out construction during rainy periods or to effectively drain the accumulated water in the ditch. During excavation, a soil layer with a thickness of 0.03-0.06m should be reserved at the bottom of the ditch for compaction treatment.



(6) When encountering abandoned structures, hard stones, wood, garbage and other debris at the bottom of the ditch, they must be removed, and a layer of sand or plain soil with a thickness of no less than 0.15m should be laid, leveled and compacted to the design elevation.


(7) Soft soil foundation and special corrosive soil should be treated according to design requirements.


2. Backfill soil.


(1) Frozen soil, garbage, wood, and soft materials shall not be used for backfilling. The backfill soil on both sides of the pipeline and within 0.5m above the top of the pipeline shall not contain debris such as crushed stones and bricks, and shall not be filled with gray soil. The number of stones in the backfill soil at a distance of more than 0.5m from the top of the pipe shall not exceed 10%, and the diameter shall not exceed 0.1m, and shall be evenly distributed.


(2) The support of the trench should be backfilled and compacted on both sides of the pipeline and 0.5m above the top of the pipeline, and then removed while ensuring safety. Fine sand should be used to fill the gaps.


(3.) When backfilling the trench, the suspended area at the bottom of the pipe should be backfilled first, and then both sides of the pipe should be backfilled.


(4) Backfill soil should be compacted in layers, with a virtual paving thickness of 0.2-0.3m for each layer. Backfill soil on both sides of the pipeline and within 0.5m above the pipe top must be manually compacted. Backfill soil above 0.5m above the pipe top can be compacted using small machinery, and the virtual paving thickness for each layer should be 0.25-0.4m.


(5) After the backfilling soil is compacted, the compactness should be checked layer by layer and backfilling records should be kept.


3. Lay warning tape.


(1) Warning tapes should be continuously laid along the buried gas pipeline. Before laying the warning tape, the surface should be compacted and laid flat above the pipeline. The distance from the pipeline should be 0.3-0.5 meters, but it should not be laid in the roadbed or road surface.


(2) The warning tape should be made of materials such as yellow polyethylene that are not easily decomposed, and should be printed with clear and firm warning messages. The font should not be less than 100 * 100mm.


This article is supported by water supply warning tapes. For more detailed and exciting content, please click on our website We will wholeheartedly provide you with satisfactory service.

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