The shaking table test and the seismic response analysis of the pier with vertical pile which had arranged the isolation system were done as a technology which improved pier with vertical pile's earthquake resistant ability.It has been understood that the earthquake resistant ability of the seismic isolation pier is better compared with the conventional pier. The analytical method on this study was able to forecast the effect of the seismic isolation quantitatively.For future research, we will investigate the earthquake resistant ability of an actual seismic isolation pier in detail in consideration of the influence of the foundation ground based on the result achieved for this research.

Connection of panels is an important aspect of the design of panel-assembly harbor caissons. PC cables are exclusively installed in the joints and the details concerning the connection such as groove shape, interval etc . should be carefully designed as simple as possible. The strength and aperture of the connecting parts were studied. The quantity of PC installed and the locations of the joints were set so that fully compressive force acts at the connection The mechanical properties of the joint under various limit states have been confirmed by loading tests.During the application of this technique to a prototype caisson , possible measure was taken to improve panel manufacturing and assembly precision and it was confirmed that the manufacturing precision of this technique is equal to or superior to that of conventional caissons. Panel manufacturing, panel assembly, and grout injection times were also measured to evaluate the effect of this technique on reduction of construction time.

Harbor structures with suction foundations bring sharp cost reductions over conventional gravity harbor structures consisting of foundation mounds and caissons thanks to their superior structural properties and constructibility.This report presents an outline of the suction foundation structure, a description of a corroborative field test, and a summary of the results of the primary analysis of measurement data obtained during suction foundation penetration.