Research On The Heightening Effect Of Rectangular Caisson

As a mature structure of gravity type wharf,caisson has a long application history.For caissons of ordinary scale,abundant research results have been made by former researchers.However,with the large-scale and deepwater development of harbor engineering,the application of ultrahigh rectangular caisson is more often to be seen,compared to the regular caisson,heightening effect of caisson is bound to bring a series of influences.If these effects are not recognized correctly and ultrahigh caissons are designed totally according to the regular caisson,it may lead to some bad outcomes such as uneconomical design and even the damage of the caisson,this paper analyzes that the caisson heightening effect may lead to changes of bearing state,components stability and internal force calculation method in the design code may not be applicable,and analyzes these aspects,in order to make engineers understand the characteristics of the ultrahigh caisson and make the design safe and economical.heightening effect of caisson has some influences on the bearing state of wharf,this paper studies the variation of bearing load and the bearing states of different height of the Caissons which are in the same project places but under different loads,and reflects intuitively the stability of caisson,caisson’s internal force distribution and variation of bearing state,and this paper gives suggestions for the safety design and optimization of reinforcement.For heightening effect could lead to the caisson losing the stability of caisson wall,this paper uses the characteristics buckling analysis and post buckling analysis method to analyzes the law of local buckling and buckling failure behavior of different height of caisson,and proposes three methods to improve the stability of the caisson wall.As the component inner force calculation in the design code may not apply to ultrahigh rectangular caisson,this paper makes research on the applicability of the aspect of the code,making the scope of calculation method in the code more perfect,providing reference and suggestions for the design of ultrahigh rectangular caisson wharf.