Pre-stressed steel strand buttress system applicable for super-large type LNG (Liquefied Natural Gas) full-capacity storage tank

Abstract

The invention discloses a pre-stressed steel strand buttress system applicable for a super-large type LNG (Liquefied Natural Gas) full-capacity storage tank. The pre-stressed steel strand buttress system comprises six or eight buttresses, a plurality of circumferential pre-stressed steel strand beams and a plurality of vertical pre-stressed steel strand beams, wherein the buttresses are arranged outside the wall of the super-large type LNG full-capacity storage tank; the circumferential pre-stressed steel strand beams and the vertical pre-stressed steel strand beams are laid in the wall of the super-large type LNG full-capacity storage tank; two ends of the circumferential pre-stressed steel strand beams are respectively and fixedly arranged on anchorage devices on two ends, along the peripheral direction of the super-large type LNG full-capacity storage tank, of the buttresses; two ends of the vertical pre-stressed steel strand beams are respectively and fixedly arranged on anchorage devices on the top end and the bottom end outside the super-large type LNG full-capacity storage tank. By applying the system, the difficult problem of arranging a large number of pre-stressed steel strand beams of a conventional large LNG full-capacity storage tank under conditions of super-large tank type, extreme earthquake force and quite adverse geology is solved; the design requirements under various adverse conditions are met, so that the construction of the super-large type LNG full-capacity storage tank under a vast majority of site conditions is realized; therefore the system is an LNG full-capacity storage tank building technique having the characteristics of flexibility and intensiveness.

Description

technical field [0001] The invention relates to a prestressed steel strand buttress column system, in particular to a prestressed steel strand buttress column system suitable for super-large LNG full-capacity storage tanks. Background technique [0002] Liquefied natural gas (LNG) is when natural gas is cooled to -162°C under normal pressure, it changes from a gaseous state to a liquid state. The volume is about 1 / 600 of the volume of the same amount of natural gas, and the density is about 480kg / m 3 . Liquefied natural gas is colorless, odorless, non-toxic and non-corrosive, and can evaporate directly after leakage. [0003] The prestressed system of the concrete exterior wall of the storage tank is an important part of the storage tank construction, and its design optimization is the focus and difficulty of the storage tank construction work. Existing large-scale LNG full-capacity storage tanks adopt the arrangement of four buttress columns evenly distributed along the w...

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Problems solved by technology

[0005] Therefore, in order to solve the upper limit of the number of prestressed steel strand bundles and economical problems that cannot be solved by the above two methods, it is necessary to provide a new type of prestressed steel strand buttress column system to meet the requirements of ultra-large LNG under extreme site conditions. Design Requirements for Larger Quantity of Prestressed Steel Strands in Concrete Exterior Walls of Full-Containment Storage Tanks

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