DOUBLE LINE RETAINING WALL SELF-RELIANCE COMPOSITE WALL CONSTRUCTION METHOD FOR REINFORCEMENT PILE WALL

摘要

The present invention provides a construction method for a double line retaining wall self-standing composite wall in which a column is reinforced, which forms a column type wall of two rows on a weak ground in which the depth of a support layer such as a coast dredging reclaimed land is deep and a soil pressure is large. The method for a double line retaining wall self-standing composite wall forms a composite soil wall by constructing a middle reinforcing partition wall of a plain concrete method between the column type walls and supports the soil pressure by integrating a support beam and a bracing in the upper part. According to a proper embodiment of the present invention, the construction method for a double line retaining wall self-standing composite wall includes: (a) a step of designating a rear surface and an excavation surface around a reference line (CL) and constructing a first rear row retaining walls in which multiple cast-in-place (CIP) piles or multiple soil cement walls (SCW) are adjacent to each other, wherein the SCW comprising an H-pile as a core material after the rear surface is bored based on the reference line (CL); (b) a step of constructing a second front row retaining wall in which the multiple SCWs or the CIPs are adjacent to each other, wherein the H-pile is formed as the core material on the excavation surface based on the reference line (CL) to be parallel with the first rear row retaining wall at fixed intervals; (c) a step of constructing a middle reinforcing partition wall by forming the retaining wall with plain soil cement or injecting grouting at the fixed intervals in a direction orthogonal to a column direction between the first rear row retaining wall and the second front row retaining wall parallel with each other; (d) a step of installing a waling bracket at the upper end of the H-pile and individually bonding a support beam between walings on both sides after individually mounting the walings onto the waling bracket; and (e) a step of excavating the excavation surface to an excavation target depth.