Treatment method for the bottom of the large flat-bottomed storage tank to fit the supporting surface of the foundation cap

Abstract

The invention discloses a treating method for enabling the tank bottom of a large-scale flat-bottom storage tank to be attached to the supporting surface of a foundation bearing platform. The treatingmethod comprises the steps that secondary grouting is carried out on a cavity between a tank body bottom plate and the foundation bearing platform, and the cavity between the tank bottom and the foundation bearing platform is filled through secondary grouting, so that the tank bottom is completely attached to the supporting surface of the foundation bearing platform. The treating method comprisesthe steps that a cofferdam is constructed on the periphery of a tank body; grouting holes are formed by drilling in the tank body bottom plate at a certain distance; an organic composite material Trinicoat PU is selected as a grouting material for grouting; the gas originally retained in a gap between the tank body bottom plate and the foundation bearing platform is discharged in the grouting process; and the grouting holes are blocked. According to the technical scheme of the treating method for enabling the tank bottom of the large-scale flat-bottom storage tank to be attached to the supporting surface of the foundation bearing platform, the difficulty of repairing the large-scale flat-bottom storage tank is solved, and the method is suitable for treating the gap between the large-scaletank bottom plate and a foundation, so that the tank body bottom plate is ensured to be uniform in stress; and the construction is convenient, the cost is low, and the economic value is remarkable.

Description

Technical field [0001] The invention relates to the technical field of construction of large tanks, and in particular to a method for processing the bottom of a large flat-bottomed storage tank to fit the supporting surface of a foundation platform. It is generally applicable to the treatment of the gap between the bottom of the large tank and the foundation to ensure that the bottom of the tank is exposed to Uniform force. Background technique [0002] During the construction of large flat-bottomed storage tanks and tanks, due to the layout of the bottom plate welding seam and the welding sequence, the bottom plate welding residual deformation is large, and the bottom plate of the storage tank has different degrees of bulge and depression after welding; or the tank foundation is due to the design and construction Cause After construction, unevenness of unevenness occurred, resulting in a large gap between the bottom of the storage tank and the supporting surface of the platform,...

AI Technical Summary

Problems solved by technology

[0004] In the first method, due to the large residual stress during the welding process of the cylinder, the design of the support and the stiffeners are very critical before the bottom plate is removed, and a slight irregularity will easily cause changes in the roundness of the cylinder; in addition, the construction period is long, High cost, not suitable for restoration after construction is completed

[0005] The second method is that due to the increase in the unevenness of the bottom plate, it is difficult to complete the welding of the stiffeners and the bottom plate during construction. At the same time, the stiffeners are likely to cause the attachment stress of the bottom plate and change the force on the bottom plate. Detailed analysis is required, so the repair is difficult. In addition, due to the influence of the stiffener, it will cause inconvenience to the subsequent use, and the cleaning of the tank body is inconvenient

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