1、當(dāng)?shù)販系撞可蠈拥某休d力≤60KPa時，地溝底部應(yīng)加墊素混凝土層。
1. When the bearing capacity of the upper layer at the bottom of the ditch is less than 60KPa, plain concrete layer should be added at the bottom of the ditch.
2、C15素混凝土層底部土層應(yīng)先夯實后，再澆混凝土，混凝土層外表應(yīng)潤滑平整。當(dāng)?shù)撞客翆訛闈裣菪酝临|(zhì)時，應(yīng)換上(深1.0m左右)并夯實。
2. The soil layer at the bottom of C15 plain concrete layer should be compacted before concrete is poured. The surface of the concrete layer should be smooth and lubricated. When the bottom soil is collapsible, it should be replaced (about 1.0 m deep) and compacted.
3、地溝內(nèi)接頭處的地溝寬度和深度應(yīng)比非接頭處增加250～300mm 。
3. The width and depth of the ditch at the joint of the ditch should be 250-300 mm higher than that at the non-joint.
4、設(shè)有波紋補償器的位置，波紋補償器底部的土層標高應(yīng)依據(jù)補償器的實踐到貨尺寸肯定。
4. The location of the corrugated compensator and the soil elevation at the bottom of the corrugated compensator should be determined according to the actual arrival size of the compensator.
5、溝底上層沿管線的坡度應(yīng)保證同管道的坡度分歧。
5. The gradient of the upper layer of ditch bottom along the pipeline should be different from that of the same pipeline.
6、直埋管道四周100mm用細砂境實。砂粒直徑應(yīng)不大于8mm，砂層中不可合有粘土、磚、石、鐵件等雜物。
6. Fine sand is used around 100 mm of buried pipeline. The diameter of sand should be no more than 8 mm. Clay, brick, stone, iron and other impurities should not be mixed in the sand layer.
7、當(dāng)管道理設(shè)在爐渣、雜物等腐蝕性較強的土層地段時，回填土應(yīng)換以腐蝕性較小的土壤，并分層夯實。
7. When the pipeline is located in the corrosive soil such as slag and sundries, the backfill should be replaced by the less corrosive soil and compacted layer by layer.
8、溝槽必需做好排水工作，可采用排水溝，集水池用水泵掃除。
8. The groove must be drained well. Drainage ditches can be used and water pumps can be used to clean the catchment pool.
聚氨酯保溫鋼管管道的裝置必需在管溝開挖和溝底土層處置合格后停止。裝置時留意以下請求；
The installation of polyurethane insulating steel pipe must be stopped after the ditch excavation and the disposal of the soil layer at the bottom of the ditch are qualified. Note the following requests when installing the device.
1、管道下溝前需對其處外表的防腐層停止認真檢查，發(fā)現(xiàn)防腐層有損壞的，應(yīng)及時停止處置。
1. Before the pipeline goes down the ditch, it is necessary to stop carefully inspecting the anticorrosive coatings on its exterior. If it is found that the anticorrosive coatings are damaged, it should stop disposing of them in time.
2、管道對接時，應(yīng)保證管道設(shè)計軸線及坡度。
2. Pipeline design axis and slope should be guaranteed when docking.
3、預(yù)制保溫管可單根吊入溝內(nèi)裝置，也可兩根或多根組織焊完后吊裝。當(dāng)組焊管段較長時，宜用兩臺或多臺吊車抬管下管，吊點的位置按均衡條件選定。嚴禁將管道直接推入溝內(nèi)。
3. Prefabricated insulating pipes can be hoisted into ditches by a single device, or two or more tissues can be hoisted after welding. When the welded pipe section is long, two or more cranes should be used to lift the lower pipe, and the location of the hanging points should be selected according to the equilibrium conditions. It is strictly forbidden to push the pipeline directly into the ditch.
4、工作鋼管焊接完成并經(jīng)檢驗合格后，即可處置接頭的保溫、外套管銜接的工作，可先立模停止聚氨脂發(fā)泡，再用熱縮帶將接頭局部整體密封，兩端和直管各搭接100mm；也可先將外套管對焊處置，并經(jīng)密封檢查合格后開孔發(fā)泡。
4. After the welding of the working steel pipe is completed and the inspection is qualified, the heat preservation of the joint and the connection of the outer sleeve can be handled. The polyurethane foaming can be stopped by erecting the die, then the joint can be sealed locally and integrally with the heat shrinkage belt, and the ends and straight pipes can be lapped 100 mm each. The outer sleeve can also be butt welded and handled first, and the sealing inspection is qualified before opening and foaming.
5、當(dāng)日工程竣工時應(yīng)將管端用盲板封堵，以防泥、水進入管內(nèi)。
5. When the project is completed on that day, the pipe end shall be sealed with blind board to prevent mud and water from entering the pipe.
6、預(yù)制保溫管有冷裝置、熱預(yù)應(yīng)力裝置和一次性補償器裝置三種方式。
6. Prefabricated insulating pipes have three ways: cooling device, thermal prestressing device and disposable compensator device.
7、冷裝置就是直接將管段各段銜接，并經(jīng)檢驗合格后按規(guī)范回填即可；
7. The cooling device is to connect the segments of the pipe directly and fill them back according to the specifications after passing the inspection.
8、熱預(yù)應(yīng)力裝置是先將管道預(yù)熱至工作溫度的60％時焊接，然后回填夯實。
8. The thermal prestressing device is to weld the pipeline when it is preheated to 60% of the working temperature, and then backfill and tamping.
9、一次性補償器必需在管道升溫至工作溫度的60％時焊接，再停止回填和夯實。
9. The disposable compensator must be welded when the pipeline is heated to 60% of the working temperature, and then stop backfilling and tamping.
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