RAINWATER STORAGE TANK CONSTRUCTION METHOD USING TOP-DOWN METHOD

摘要

The present invention is a simple process and relates to a method of constructing a rainwater storage tank using a top-down method to easily construct a rainwater storage tank into a basement of a desired depth, and this construction method primarily involves excavating a target ground to first circular excavation. A primary excavation step (S10) to be formed, a primary segment installation step (S20) to install a primary segment in the primary circular excavation part, and a slab construction to construct a concrete slab on the ground around the primary segment Step (S30), a primary segment fixing step (S40) for fixing the primary segment to the slab, a secondary digging step (S50) for excavating the ground below the primary segment, and the primary segment Secondary segment installation step (S60) of installing a secondary segment at the bottom of the, and filling the inner wall filling step of fixing the secondary segment by injecting concrete between the inner wall of the primary circular digging part and the outer circumferential surface of the secondary segment (S70), the second excavation step (S50), the secondary segment installation step (S60) and the rainwater storage tank construction completion step (S80) repeatedly performing the inner wall filling fixing step (S70), and the primary excavation step ( It includes a continuous construction step (S90) of the rainwater storage tank repeatedly performed from S10) to the completion of the rainwater storage tank construction step (S80), and a drain pipe connection step (S100) connecting a drain pipe between the rainwater storage tanks.