A method for renovating a quay wall section by section, wherein use is made of a Z-shaped renovation element (1, 1', 1", 2) comprising: - a lip ; - a main body , - a foot including one or more apertures ; and - one or more pile receiving elements associated with the main body and/or the lip ; wherein the method, per quay wall section , comprises the steps of: - drilling through the quay wall on at least one position and in a substantially vertical direction, to obtain at least one drill hole extending through the quay wall ; - providing at least one reinforcing pile ; - placing the reinforcing pile in said drill hole , the reinforcing pile protruding with respect to the quay wall ; - providing at least one supporting pile ; - arranging the supporting pile in a waterway bottom , on a position in front of the quay wall section to be renovated, the supporting pile protruding with respect to the waterway bottom ; - placing the Z-shaped renovation element (1, 1', 1", 2) against the quay wall , the at least one pile receiving element of the Z-shaped renovation element (1, 1', 1", 2) receiving the reinforcing pile protruding from the quay wall and the at least one aperture in the foot of the Z-shaped renovation element (1, 1', 1", 2) receiving the supporting pile protruding from the waterway bottom ; and - fixating the Z-shaped renovation element (1, 1', 1", 2) with respect to the quay wall to obtain a renovated quay wall section , the lip of the Z-shaped renovation element (1, 1', 1", 2) forming an upper side of the renovated quay wall section and the foot of the Z-shaped renovation element (1, 1', 1", 2) extending away from the renovated quay wall section , into the waterway . - a lip ; - a main body , - a foot including one or more apertures ; and - one or more pile receiving elements associated with the main body and/or the lip ; - drilling through the quay wall on at least one position and in a substantially vertical direction, to obtain at least one drill hole extending through the quay wall ; - providing at least one reinforcing pile ; - placing the reinforcing pile in said drill hole , the reinforcing pile protruding with respect to the quay wall ; - providing at least one supporting pile ; - arranging the supporting pile in a waterway bottom , on a position in front of the quay wall section to be renovated, the supporting pile protruding with respect to the waterway bottom ; - placing the Z-shaped renovation element (1, 1', 1", 2) against the quay wall , the at least one pile receiving element of the Z-shaped renovation element (1, 1', 1", 2) receiving the reinforcing pile protruding from the quay wall and the at least one aperture in the foot of the Z-shaped renovation element (1, 1', 1", 2) receiving the supporting pile protruding from the waterway bottom ; and - fixating the Z-shaped renovation element (1, 1', 1", 2) with respect to the quay wall to obtain a renovated quay wall section , the lip of the Z-shaped renovation element (1, 1', 1", 2) forming an upper side of the renovated quay wall section and the foot of the Z-shaped renovation element (1, 1', 1", 2) extending away from the renovated quay wall section , into the waterway . <EOS>