DOUBLE SHEET-PILE STRUCTURE

PURPOSE: To secure a double sheet pile that is large in buckling strength and ease of execution by forming a reinforcing bulkhead to be installed in the inner part of a double wall body consisting of a steel pipe sheet pile or the like as being connected to section steel with a rib of H steel on the like, and connecting the end pant with a joint. CONSTITUTION: A bulkhead 3, being composed of a standard panel 30a made up of welding plural pieces of H steel to a flange part and a space adjusting deformable panel 30b, is installed in the inner part of a double wall body consisting of two sheet- pile walls 1 and 2 placed two steel sheet piles or steel-pipe sheet piles 11 and 21 in two rows at an interval between them. In addition, a joint member 33 is installed in each space between the sheet piles 11, 21 and the panel 30a as well as between both the panels 30a and 30b respectively, and then a solidifier such as mortar 34 or the like is filled up and connected together. This double wall body is used for a temporary cutoff or the like to a time when a structure of an underwater tunnel and a pier or suchlike is set up, and an interval between the sheet-pile walls 1 and 2 is reinforced firmly with limited structural steel, while both setup and disassembly operations are made so as to be easily performable. With this constitution, the promotion of efficiency in execution of works is well expedited.