Sand bed structure and construction method of earth-covered storage tank

Abstract

The invention relates to a sand bed structure for soil-covered storage tanks and a construction method of the sand bed structure and belongs to the field of mounting of large petrochemical engineering static equipment and geotechnical engineering construction. The sand bed structure comprises the one or more storage tanks; the multiple storage tanks are arranged in one soil-covered structure side by side; The sand bed structure is characterized in that each storage tank is directly arranged on a sand bed above the highest underground water level; the sand bed is a continuous sand bed; a uniformly-settled and flat basis is arranged below; the outer surfaces of all the storage tanks are completely covered with a soil covering layer; a circle of retaining wall is arranged on the periphery of the soil covering layer; an apron slope and an open drain are arranged at the outer wall foot of the retaining wall; an anti-erosion layer is further arranged above the soil covering layer; a tank bottom connecting pipe is arranged at the bottom of each storage tank; a tank bottom passage is arranged below the tank bottom connecting pipe at the bottom of each storage tank; and the tank bottom connecting pipes are arranged in the tank bottom passages below the tank bottom connecting pipes. The structure has the advantages of being convenient to construct, low in equipment input cost, convenient to master, high in efficiency and stable in quality.

Description

technical field [0001] The invention relates to a soil-covered storage tank sand bed structure and a construction method thereof, belonging to the field of large-scale petrochemical static equipment installation and geotechnical engineering construction. Background technique [0002] The soil-covered storage tank used for storing liquefied hydrocarbons at room temperature and pressure is a horizontal cylindrical pressure-bearing storage tank with no saddle support at the bottom, placed directly on the sand bed above the ground or on a semi-excavated ground, and the outer surface is completely covered with soil . The soil-covered storage tank can effectively prevent the Boiling Liquid Expanding Vapor Explosion (BLEVE) when storing liquefied hydrocarbons at room temperature and pressure, and is not subject to nearby heat sources, explosion shock waves, splash impacts or other sudden damage, and has a beautiful environment , Reduce the occupied area, reduce the safety distance...

AI Technical Summary

Problems solved by technology

The soil-covered storage tank adopts the unique structure of sand bed and soil, which determines the construction difference from other storage tanks, spherical tanks or buried storage tanks on the ground. Therefore, there have always been some technical difficulties that are difficult to solve, such as how to ensure the sand bed and The construction quality of the covering soil, how to control the hidden danger of uneven settlement during construction and operation, how to avoid the overloading of the covering soil, how to ensure the stable support of the storage tank and its hydraulic test, etc.

Images