EARTH RETAINING METHOD

PROBLEM TO BE SOLVED: To provide an earth retaining method in the case of excavating the ground deeper than the lower end of an existing underground outer peripheral wall in excavation work of using the underground outer peripheral wall of an existing skeleton for earth retaining in constructing a newly built skeleton. SOLUTION: The earth retaining method of using the existing underground outer peripheral wall 12 of the existing skeleton for earth retaining of the newly built skeleton and excavating the ground deeper than the lower end 16 of the underground outer peripheral wall 12 includes demolishing the inside part of an existing pressure plate leaving the outer peripheral edge of the existing pressure plate of the existing skeleton, excavating the ground of the inside part directly under, leaving the ground directly under the underground outer peripheral wall 12, excavating the ground left directly under the underground outer peripheral wall 12 by a suitable length, forming an RC reinforced wall 20 in the excavated part while supporting the load of the existing skeleton by the outer peripheral edge of the left existing pressure plate, and sequentially repeating excavation of the left ground directly under the underground outer peripheral wall 12 and formation of the RC reinforced wall 20 while supporting the load of the existing skeleton by the RC reinforced wall 20 and the outer peripheral edge of the left existing pressure plate. COPYRIGHT: (C)2011,JPO&INPIT