| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a construction method of a multilayer impervious structure, for restraining a sharp rise in construction cost, and shortening a construction period, by reducing a use amount of a hardener, by forming a solidification wall established in the ground in a necessary minimum size, by establishing the solidification wall only in the necessary depth in the ground.SOLUTION: A construction method of a multilayer impervious structure comprises: a solidification wall establishing process of establishing a solidification wall T of a vertical directional wall shape in the ground by inserting a pipe rod up to a predetermined depth into the ground, injecting a hardener from three injection nozzles provided in the pipe rod after the insertion, injecting the hardener in a predetermined range from the three injection nozzles, and repeatedly executing the above processes upward; and an impervious plate installation process of installing an impervious plate S by inserting it vertically into the solidification wall T before the solidification wall T is hardened after the solidification wall establishing process.</p> |
