Study And Optimization Of The Frame-fixed Row-pattern Pile Cofferdam

The Frame-fixed Row-pattern Pile Cofferdam as a new structure can be used in soft soil,which can be use for can be used for the construction of cofferdams,breakwaters and cofferdams,etc.this structure is similar to structure of sheet pile,but also a combination of gravity and high pile structure The advantage of the structure is that its integrity is good and its durability is high;structural applicability and utilization is strong.Such structures use with good engineering quality,construction speed,suitable for sand and gravel lack of soft soil,etc.,first a worthy new structure in the project.However,due to the pile wall frame structure it is a new structure,the domestic research and practical experience much,related specifications are not yet developed,so pile on the stability of the wall frame structure does not have a perfect method of calculation.In this paper,the Frame-fixed Row-pattern Pile Cofferdam stability of the pile against a wall and combine Dongjiang’s engineering did a series of studies.Firstly,assuming that the failure mode pile wall frame structure,and proposed to simplify the algorithm checking the structural stability of the structure based on the assumption of failure modes.Secondly,within Dongjiang’s engineering,using the finite element strength reduction in structural stability analysis and failure mode and assumes that the results of a simplified algorithm and structure for comparison.Finally,based on Dongjiang’s engineering,for different soil surface,by varying the width of the frame wall pile frame structure,wall pile diameter,depth,and the front wall of the ballast pile height,combined with engineering cost analysis,elected in Subject to the stability of security,the lowest cost structure section.In summary,this paper,the finite element pile wall stability framework were explored,a simplified algorithm on structural stability,and for the practical engineering section of the structure has been optimized.The simplified algorithm on structural stability framework pile wall needs further promotion and verification.