Ground anti-seepage construction of oil depot

　　The anti-seepage film of the oil depot is mainly used for anti-seepage in the tank area of the oil depot, and its technical scheme is as follows:

　　1、 Anti seepage coating of tank farm buildings and pipeline shafts:

　　1. Welding can only be carried out after the anti-seepage membrane of the oil depot is firmly covered with the tank bottom foundation. The bottom is welded with the anti-seepage membrane of the tank area, and the upper end is anchored with a nail gun or using a lock anti-seepage process method, without nail shooting, to tightly combine the membrane with the tank body;

　　2. The walls around the sewage tank area and the anti-seepage film packaging of the sewage tank;

　　3. When laying the anti-seepage film for the oil depot on the surrounding walls, a certain degree of elasticity should be left at the bottom of the wall, and then welding should be carried out. The bottom of the wall and the top of the pool should be anchored with shooting nails, or the contact with the pipeline should be made with lock anti-seepage technology to ensure that there is no leakage;

　　4. When laying the anti-seepage membrane in the oil depot, it should be tightly covered with the trench bottom and then welded. After the geotextile is sewn together, a 10 cm thick cement should be applied to the trench bottom, and then KS adhesive should be used for bonding and sealing the gaps between the geotextile and the geotextile membrane;

　　2、 Requirements for laying anti-seepage membrane in oil depots:

　　1. Check the overlap width of the diaphragm, which should not be less than 80mm -100mm.

　　2. When laying the membrane, it should be relaxed as much as possible to avoid the membrane being suspended due to tension.

　　3. Reserve the expansion and deformation of the anti-seepage membrane based on the characteristics of the on-site substrate and the anti-seepage membrane of the oil depot according to the amplitude of local temperature changes.

　　4. Reasonably layout the position of each piece of material, striving to minimize joints.

　　5. Reasonably select the laying direction and reduce the stress on the joints. The joints should avoid bending angles.

　　3、 Installation process of tank farm and sewage tank:

　　Measurement → Film cutting → Laying → Trial welding → Welding → Self inspection → Repair → Packaging buildings → Anchoring, bonding and sealing → Acceptance

　　4、 Welding process flow of anti-seepage membrane in oil depot:

　　1. The membrane lap seam welding adopts a dual track hot melt welding machine, and the welding process is as follows:

　　Adjust the overlap size → Clean the weld interface → Hot melt welding → Visual inspection → Acceptance by the project department.

　　2. Plastic welding guns should be used to repair, cover or areas that cannot be reached by dual track hot melt welding machines. The welding process is as follows:

　　Film surface cleaning → Hot internal bonding positioning → Weld area roughening → Plastic welding gun repair → Appearance inspection → Project department acceptance.