| Combining with the engineering practice,to new stake to central China coal transport railway gian ganjiang bridge as the engineering background,the details of the complex hydrological and geological conditions of the large bridge deep water foundation construction measures,both in the pier structure,drilling platform structure,the steel sheet pile structure,double-wall steel boxed cofferdam for design calculation,and includes all kinds of adverse condition in the construction process on the structure model,the internal force and purlin,supporting the differences of the thorough analysis,at the same time the necessary instructions for each step construction technology to,points out that the construction of the innovation points,understand the construction procedure of the influence of the temporary structure.From the pier,platform,double-wall steel cofferdam and larsen steel sheet pile structure of square in the face of the deep foundation construction measures and construction methods of planning and design and improvement,first on the pier and platform for bare rock in bed or layer thinner cases,how to meet the requirement of anchorage,and at the same time,in view of the pier and the parameters of the platform structure,span layout,upper and lower structure,beam and pile design calculation,the second is the main piers double-wall steel cofferdam,Under the action of different construction conditions,the stress analysis and check calculation are carried out on the wall slab,vertical rib,horizontal ring slab,horizontal truss and other components of the cofferdam.Then,the finite element analysis is carried out on the cofferdam modeling by using MIIDAS software,and the results are compared with the calculated results by hand.Finally,the size of each component of the cofferdam is determined.Finally,the necessary explanation is made for the construction technology of steel sheet pile cofferdam in each step.According to the construction steps,the stress of steel sheet pile is analyzed,and the stress performance of internal support is analyzed. |
