3 of Tianluo Bridge on Wenzhou-Fuzhou Railway,this paper describes the ways to resolve the construction problems of the foundations in deep water in sea and at seabed that is steep and without overburden,using the construction techniques of underwater rock blasting,steel cofferdam floating,positioning,bottom sealing and manual pile digging.

This paper describes the functioning mechanism,applicable geologic condition and working procedure(making,airtight inspecting,floating,locating and submerging,upper structure placing) on the basis of the application of cylindrical foundation in the artificial island engineering and points out the key of monitoring of every working procedure.

Steel cylindrical foundation structure has more characters,such as easy processing,stable floating,convinient locating and sinking in-situ,easy down-sink.

Taking Fujian Quanzhou Port Xiaocuo Port Area wharf engineering as a case,this paper introduces the construction technology of caisson floating transportation and installation using submerged barges.

Authors mainly introduce quality control of allotype caisson in prefabrication,float transport and installation process.

Simply discussing on the construction of deep water bridge peg foundation with floating hauling double-wall steel cofferdam;

This paper introduces the up-floating && barge-unloading by use of semi-submerged barge, floating hauling, GPS positioning, and construction method for deepwater installation of large-scale caisson for offshore unsheltered large-scale deepwater breakwater.

The dynamic test equipment with pitching and plunging motion is set up in NUAA.

Experimental study of local scour for No.2 floating cofferdam of Wuhan Tianxingzhou Rail-Cum-Road Bridge;