Abstract
By analyzing and summarizing the process and requirements of cross beam installation, an underwater three-direction positioning equipment is developed. Through three sets of hydraulic cylinders and MGE sliders combining hydraulic synchronizing lifting technique and computer communication technology, precise automatic positioning is achieved. The equipment can be used in positioning other similar large structures.
Highlights
The water slide used for large ships’ sailing and launching is fixed in the precast reinforced concreted cross beams after matching in the onshore, installed with the cross beams to the completed base
In order to ensure the ship girder smoothly into the water, higher requirements on the installation precision of slideway is put forward, and the installation accuracy depends on cross beams installation accuracy
We must ensure that installation precision of cross beams, and cross beams should be adjusted during construction
Summary
The water slide used for large ships’ sailing and launching is fixed in the precast reinforced concreted cross beams after matching in the onshore, installed with the cross beams to the completed base. According to the deviation informed by divers, hoists are adjusted to ensure the location deviation of cross beams falls within the scope of the accuracy requirement. The methods above can ensure the installation accuracy of cross beams within ±4mm [2]. These methods require the installation or construction of extra auxiliary structures, while the auxiliary structures and cross beams are not independent from the secondary structures. Through the theoretical analysis of location adjustment of cross beams, introducing a three position adjusting device, combined with hydraulic synchronous lifting technology and computer networking technology, a high accuracy can be achieved as well as high efficiency, automatic and digital adjustment process, which can be applied to other similar large beam adjusting engineering project
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