The invention discloses a bridge composite foundation for
deep water and strong earthquake conditions, and particularly relates to combination application of a group
pile foundation body, suction
caisson foundation bodies, a pressure-less
caisson foundation body and a reinforced
cushion. According to the bridge composite foundation, the multiple suction
caisson foundation bodies are arranged on the periphery of the pressure-less caisson foundation body in an annular shape, the pressure-less caisson foundation body is directly arranged at the top of the reinforced
cushion and is not connected to piles and the suction caisson foundation bodies, the position between the suction caisson foundation bodies and the pressure-less caisson foundation body is filled with ring-and-
stringer-stiffened
rubble, and the reinforced
cushion plays a main role in
seismic isolation, is formed by combining a sand cushion body, a
pebble bed and a
rubble layer and is further provided with
geotextile and a
geogrid so as to control particle
dislocation and cushion
liquefaction. The novel bridge composite foundation can be applied to the
deep water and strong earthquake severe natural conditions, the seismicisolation effect can be achieved, the transmission of the earthquake force from the ground to the foundation can be reduced, meanwhile, a relatively large horizontal load can be borne, the horizontaldisplacement of the foundation can be limited, and the safe use of a bridge can be guaranteed.