A Study On The Transportation And Installation Technics For Very Large Caissons And Its Application In Projects

Construction of caisson has many keypoints such as design, prefabrication,transportation, storage and installation, etc,. Transportation and installation which areaffected and restricted by natural conditions, the ship machine equipment condition,caisson weight, economic conditions and other aspects, are the keypoints in theconstruction of caisson. At present, the weight of domestic caisson precast has beendeveloped from hundreds to thousands of tons, the gigantism of caisson raises morerequirements for jacking, transportation and installation. Engineering practice in recentyears has exposed the weakness of traditional caisson transportation technics for verylarge caissons.First, this paper takes the caisson transportation practice of Qianwan port areaphase four project as an example, analyses characteristics of very large caisson by jack,trolley translation floating dock transportation mode, summarizes the transportationand installation method and process control of caisson. Based on the analyses ofcaisson transportation processes, the paper summarized the advantages anddisadvantages of the caisson transportation technics.Second, in view of the limitations of the traditional caisson transportation technicsof very large caisson construction, this paper analyses the new technic system structureand technological process of capsule trolley shipment. Through the technical andeconomic comparison, this paper demonstrates the feasibility of process fortransportation of very large caisson construction.Finally, this paper takes the very large caisson transportation and installation inDongjiakou port area as an example, summarizes the performance of the capsuletrolley transportation process, and the installation method and process control of verylarge caisson by floating crane. The results of the study show that capsule trolleytransportation technic and installation technic by floating crane are advanced. Thetechnics used in the transportation and installation practice for very large caissons havethe advantage of high safety and stability and efficiency of caisson transportation.