Development of fast construction method of LNG storage tank wall using permanent precast concrete form

LNG tanks are complex in design and building process and high in costs, so LNG tank technology is one of the most advanced ones in the field of energy sector. The outer concrete walls of existing LNG storage usually is constructed using cast-in-place concrete method. The current common practice of in-situ cast in construction represent limitation in continuous construction that can be resulted in longer construction time and delays in project competition. The proposed construction method suggested in this paper has an advantage that results in progress of inner and outer tank construction at the same time by using freestanding wall liner system. In the proposed method, the inner wall liner is used as an inner form and outer precast concrete panel is used as a permanent outer form to reduce the construction period. This paper presents a feasibility and verification processes that is also including a structural analysis and a finite analysis model complemented by testing measurements. The analytical models and the results were calibrated based on the measured data. The results indicated the feasibility and benefit of using the propose method.