當(dāng)開挖施工時(shí)，如挖到燃?xì)?a href="http://m.scnu-graduate.com">管道警示帶，則表示在下方0.30.5米處有燃?xì)夤艿溃鸬搅司竞捅Ｗo(hù)作用。那么您知道燃?xì)夤艿谰編喜坶_挖和回填土操作是怎樣的嗎？

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?

溝槽開挖

Trench excavation

(1)混凝土路面和瀝青路面的開挖應(yīng)使用切割機(jī)切割。

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

(2)管道溝槽應(yīng)按設(shè)計(jì)規(guī)定的平面位置和標(biāo)高開挖。當(dāng)采用人工開挖且無地下水時(shí)，槽底預(yù)留值應(yīng)為0.05~0.10m;管道安裝前應(yīng)人工清底設(shè)計(jì)標(biāo)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)管溝溝底寬度和工作尺寸，應(yīng)根據(jù)現(xiàn)場(chǎng)實(shí)際情況和管道敷設(shè)方法確定。

(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)局部超挖部分應(yīng)回填夯實(shí)。當(dāng)溝底無地下水時(shí)，超挖在0.15m以內(nèi)，可采用原土回填;超挖在0.15,以上，可采用石灰土處理。當(dāng)溝底有地下水或水量較大時(shí)，應(yīng)采用級(jí)配砂石或天然砂回填標(biāo)高。超挖部分回填后壓實(shí)，其密實(shí)度應(yīng)接近原地基天然土的密實(shí)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)在濕陷性黃土地區(qū)，不宜在雨期施工，或在施工時(shí)切實(shí)排除溝內(nèi)積水，開挖時(shí)應(yīng)在溝底預(yù)留值0.03~0.06m厚的土層進(jìn)行壓實(shí)處理。

(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)溝底遇有廢棄構(gòu)筑物、硬石、木頭、垃圾等雜物時(shí)必須，并應(yīng)鋪一層厚度不小于0.15m砂土或素土，整平壓實(shí)及設(shè)計(jì)標(biāo)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)對(duì)軟土基及特殊腐蝕土壤，應(yīng)按設(shè)計(jì)要求處理。

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

回填土

back fill

(1)不得采用凍土、垃圾、木材及軟性物質(zhì)回填。管道兩側(cè)及管頂以上0.5m內(nèi)的回填土，不得含有碎石、磚塊等雜物，且不得采用灰土回填。距管頂0.5m以上的回填土中的石塊不得多于10%、直徑不得大于0.1m,且均勻分布。

(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)溝槽的支撐應(yīng)在管道兩側(cè)及管頂以上0.5m回填完畢并壓實(shí)后，在保證的情況下進(jìn)行拆除，并應(yīng)采取細(xì)砂填實(shí)縫隙。

(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.)溝槽回填時(shí)，應(yīng)先回填管底懸空部位，再回填管道兩側(cè)。

(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)回填土應(yīng)分層壓實(shí)，每層虛鋪厚度宜為0.2~0.3m，管道兩側(cè)及管頂以上0.5m內(nèi)的回填土必須采用人工壓實(shí)，管頂0.5m以上的回填土可采用小型機(jī)械壓實(shí)，每層虛鋪厚度宜為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)回填土壓實(shí)后，應(yīng)分層檢查密實(shí)度，并做好回填記錄。

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

以上就是今天為大家介紹的關(guān)于問題以及注意事項(xiàng)的全部?jī)?nèi)容，希望對(duì)大家能有所幫助，想要了解更多內(nèi)容可以電話聯(lián)系我們或者關(guān)注我們的網(wǎng)站http://m.scnu-graduate.com，我們的工作人員會(huì)及時(shí)與您取得聯(lián)系。

The above is all about the problems and precautions introduced to you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://m.scnu-graduate.com , our staff will contact you in time.