Abstract
The stability mechanism of large-diameter steel cylinder under fill load has not yet formed a complete theory. In order to calculate the stability of the steel cylinder island arm structure in a certain project, the limit equilibrium and finite element method are used in this paper. The limit equilibrium method is based on the limit equilibrium of the soil inside and outside the steel cylinder, taking into account the earth pressure and friction force on the cylinder, and using moment equilibrium to calculate its stability coefficient. Secondly, the finite element strength reduction method is adopted to analyze the stability of the steel cylinder island arm structure by using strength parameters to correlate with the temperature field and changing the boundary conditions of the temperature field. The results and analysis methods of this paper provide references for the construction and design of the same type of projects.
Highlights
Foreign countries have studied the stress state and working mechanism of large diameter cylinder structure earlier
In the mid1960s, the Inland River Survey and Design Institute of the former Soviet Union studied the interaction between the largediameter gravity thin shell and foundation soil and inner filler, and put forward the conclusion that the friction between the thin shell and soil has great influence on the stability of the whole structure
Wharves with steel cylinder structure were built in Riga daud Lake and Klaipeter in the former Soviet Union
Summary
Foreign countries have studied the stress state and working mechanism of large diameter cylinder structure earlier. During the construction of le havre port wharf in France in 1950s, French engineers started the model experiment study of large thinshell open caisson, analyzed the relationship between the compactness of inner packing and its load, and the contact friction value between backfill and cylinder wall, and discussed the influencing factors of the change of lateral pressure inside thin shell. Steel cylinder wharf has been widely used in port engineering in France, former Soviet Union, Canada, Japan and other countries. The stability of steel cylinder itself is mainly simulated by limit equilibrium theory and finite element method.
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