PROBLEM TO BE SOLVED: To reform a quay wall without changing the quay wall normal by driving a steel pipe pile deeper than an existing steel sheet pile adjacently to the back of the steel sheet pile, connecting it with a shore, mutually coping the upper ends of the steel sheet pile and the steel pipe pile, and also connecting the shore to the steel sheet pile. ;SOLUTION: A steel pipe pile 6 is driven adjacently to the back of an existing steel sheet pile 1 more deeply than the steel sheet pile 1 so as to be in parallel thereto avoiding a tie rod 41. In the rear ground, steel pipe piles 8a, Bb are set as braces between steel pipe piles 7. The upper ends of the steep pipe piles 8a, 8b are connected to the upper end of the steel pipe pile 6 by a tie rod 4b. Further, copings 9a, 9b are formed on the upper ends of the steel sheet pile 1 and the steel pipe pile 6 to integrally connect them. The steel pipe piles 8a, 8b are integrated to the steel pipe pile 7 by a coping 9c. Thus, the whole main acting earth pressure acts on the pile 6 by the arch effect of the earth and sand between the piles and also acts on the sheet pile l. Therefore, a quay wall in which the limitation of the quay wall operation can be minimized can be provided.;COPYRIGHT: (C)1998,JPO
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