| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint part structure of a caisson that can quickly detect and cope with dislocation or a water leakage without impairing an impervious function when mutual dislocation of adjacent caissons occurs due to an earthquake or land subsidence or when the water leakage occurs. SOLUTION: Impervious recesses 3 and a monitoring recess 6 are formed at the end face of the caisson 2. These recesses 3, 6 are gradually enlarged from the lower side to the upper side of the caisson 3. The adjacent caissons 3 are installed so that the respective impervious recesses 3 and monitoring recesses 6 are located facing each other in the installed state of the support ground 10. I-shape steel 4 is held in an impervious space part 30 formed by the impervious recesses 3, and a protective pipe 7 comprising double pipes 7a, 7b is held in a monitoring space part 60 formed by the monitoring recesses 6. An asphalt-based, soil-based or concrete-based impervious material is injected and filled in the impervious space part 30. A cable of a leakage sensor is inserted through the protective pipe 7 to detect the presence of water leakage. COPYRIGHT: (C)2008,JPO&INPIT
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