| 摘要 |
PURPOSE:To better the extent of sealability by making axial length free of expansive displacement in constant length, and using a ringlike closed tube provided with a pressure fluid feed-exhaust port as a gable form. CONSTITUTION:A fluid feed-exhaust port 8b leading to an inner space S is installed, while axial length l is made to be free of expansive displacement in constant length, and a gable form 8 is constituted of a ringlike closed tube formed into a shape that is supported by a variable end edge 8a. Next, the inside of a concrete directly placed partition P constituted of a tail plate 1a, an inner form 2, the gable form 8 and the existing covering concrete lining W is filled up with fresh concrete 3. Then, a shield jack 4 is extendedly operated and simultaneously a pressure fluid is fed to an inner space S of the gable form 8 through the pressure fluid feed-exhaust port 8b, pressing the concrete 3 with a tip part of the gable form 8. With this constitution, a structure is thus simplifiable. |
