Slope protection foundation is generally used for the arch roof API 650 cylindrical tanks foundation with better foundation and fixed roof and floating roof API 650 cylindrical tanks foundation with small volume and movable roof. The following is a general practice for slope protection foundation.
After digging the soil layer and organic matter on the ground surface of the site, the foundation soil of the base course shall be tamped. Special attention should be paid to the drainage of rainwater at this time, and the foundation soil of API 650 cylindrical tanks must not be soaked in water. Then, the filling materials of the foundation are determined according to the process design elevation. When the foundation filling height is less than one meter, the foundation can be directly made as sand cushion. When the foundation filling height is more than one meter, one-step soil cushion, lime soil cushion or gravel cushion can be made first. The total thickness of this layer should not exceed one meter. Then, the sand cushion shall be directly constructed on the cushion, asphalt sand insulation layer is constructed on sand cushion. Sometimes in order to prevent the sand disturbance on the surface of the sand cushion during the construction of asphalt sand insulation layer, a layer of gravel layer with a particle size of two to five cm can be paved on the sand cushion, and then the asphalt sand insulation layer is made. The thickness depends on the size of API 650 cylindrical tanks.
During the foundation construction of API 650 cylindrical tanks, the pre arch slope shall be made from the center of API 650 cylindrical tanks foundation to the surrounding edge from the excavation to the completion of sand cushion construction. The gradient is generally determined as between 1.5% and 5% according to the diameter of API 650 cylindrical tanks. The foundation of API 650 cylindrical tanks shall be 30-50 cm higher than the design ground. The slope shall be paved with rubble or prefabricated concrete blocks around it. The slope is generally one to one and one point five. The drain ditch is built at the toe of the slope. Rainwater or surface water has been discharged into the well to prevent the foundation from being drained smoothly.
Henan BEBON Iron & Steel Co., Ltd was founded in 2000, which initially focus on providing high-quality steel products to serve for China's rapid infrastructure development. Based on the advantages of steel resources in domestic market and good reputation, combining with the huge international market demand for steel products, BEBON started the international business in 2010 and successfully being approved and certified by ISO9001:2008, the Registration number is 626014Q11531R0S. With the quality steel products and professional service, BEBON was award the international acclaim from infrastructure, shipbuilding, petroleum industry etc., and gradually grow into a bright star in the steel export industry .
With the exploration and innovation of Bebon people, BEBON gradually formed four major advantageous products: steel plate, steel pipe, stainless steel, special steel, and established our own Machining processing center in order to meet customer's diverse requirements.
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