当开挖施工时，如挖到燃气管道警示带，则表示在下方0.30.5米处有燃气管道，起到了警示和保护作用。那么您知道燃气管道警示带沟槽开挖和回填土操作是怎样的吗？

During excavation, if a gas warning tape is dug, it means that there is a gas pipeline 0.3 to 0.5 meters below, which plays a role of warning and protection. Do you know the operation of trench excavation and backfill of gas pipeline warning tape?

沟槽开挖

Trench excavation

(1)混凝土路面和沥青路面的开挖应使用切割机切割。

(1) The excavation of concrete pavement and asphalt pavement shall be cut by cutting machine.

(2)管道沟槽应按设计规定的平面位置和标高开挖。当采用人工开挖且无地下水时，槽底预留值应为0.05~0.10m;管道安装前应人工清底设计标高。

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

(3)管沟沟底宽度和工作尺寸，应根据现场实际情况和管道敷设方法确定。

(3) The width and working size of the trench bottom shall be determined according to the actual situation on site and the pipeline laying method.

(4)局部超挖部分应回填夯实。当沟底无地下水时，超挖在0.15m以内，可采用原土回填;超挖在0.15,以上，可采用石灰土处理。当沟底有地下水或水量较大时，应采用级配砂石或天然砂回填标高。超挖部分回填后压实，其密实度应接近原地基天然土的密实度。

(4) The partially over excavated part shall be backfilled and compacted. When there is no groundwater at the bottom of the ditch, the over excavation is within 0.15m, and the original soil can be used for backfilling; If the overbreak is more than 0.15, lime soil can be used for treatment. When there is groundwater at the bottom of the ditch or the water volume is large, graded sand or natural sand should be used to backfill to the elevation. The over excavated part shall be backfilled and compacted, and its compactness shall be close to that of the natural soil of the original foundation.

(5)在湿陷性黄土地区，不宜在雨期施工，或在施工时切实排除沟内积水，开挖时应在沟底预留值0.03~0.06m厚的土层进行压实处理。

(5) In the collapsible loess area, it is not suitable to construct in the rainy season, or effectively remove the ponding in the ditch during construction. During excavation, a soil layer with a thickness of 0.03~0.06m should be reserved at the bottom of the ditch for compaction.

(6)沟底遇有废弃构筑物、硬石、木头、垃圾等杂物时必须，并应铺一层厚度不小于0.15m砂土或素土，整平压实及设计标高。

(6) Waste structures, hard stones, wood, garbage and other debris at the bottom of the ditch must be removed, and a layer of sandy soil or plain soil with a thickness of not less than 0.15m shall be paved, leveled, compacted and designed elevation.

(7)对软土基及特殊腐蚀土壤，应按设计要求处理。

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

回填土

back fill

(1)不得采用冻土、垃圾、木材及软性物质回填。管道两侧及管顶以上0.5m内的回填土，不得含有碎石、砖块等杂物，且不得采用灰土回填。距管顶0.5m以上的回填土中的石块不得多于10%、直径不得大于0.1m,且均匀分布。

(1) Frozen soil, garbage, wood and soft materials shall not be used for backfilling. The backfill on both sides of the pipeline and within 0.5m above the pipe top shall not contain debris, bricks and other debris, and shall not be backfilled with lime soil. The stones in the backfill soil above 0.5m from the pipe top shall not be more than 10%, and the diameter shall not be more than 0.1M, and shall be evenly distributed.

(2)沟槽的支撑应在管道两侧及管顶以上0.5m回填完毕并压实后，在保证的情况下进行拆除，并应采取细砂填实缝隙。

(2) The support of the trench shall be backfilled and compacted on both sides of the pipe and 0.5m above the pipe top, and then removed under the condition of ensuring safety, and the gap shall be filled with fine sand.

(3.)沟槽回填时，应先回填管底悬空部位，再回填管道两侧。

(3) when backfilling the trench, the suspended part at the bottom of the pipe shall be backfilled first, and then both sides of the pipe shall be backfilled.

(4)回填土应分层压实，每层虚铺厚度宜为0.2~0.3m，管道两侧及管顶以上0.5m内的回填土必须采用人工压实，管顶0.5m以上的回填土可采用小型机械压实，每层虚铺厚度宜为0.25~0.4m。

(4) The backfill soil shall be compacted in layers, and the virtual paving thickness of each layer should be 0.2~0.3m. The backfill soil on both sides of the pipeline and within 0.5m above the pipe top must be compacted manually. The backfill soil above 0.5m above the pipe top can be compacted by small machinery, and the virtual paving thickness of each layer should be 0.25~0.4m.

(5)回填土压实后，应分层检查密实度，并做好回填记录。

(5) After the backfill is compacted, the compactness shall be checked layer by layer, and the backfill records shall be made.

以上就是今天为大家介绍的关于问题以及注意事项的全部内容，希望对大家能有所帮助，想要了解更多内容可以电话必赢国际或者关注我们的网站http://www.lnszgh.com，我们的工作人员会及时与您取得联系。

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