| 摘要 |
PURPOSE: Provided are well foundation repair work and its structure to reduce the construction period just by operating adjusting bolt in its FRP frame without complicated subtask such as site construction of sheet pile in repairing well foundation. CONSTITUTION: The well foundation(10) repair work comprises the following steps as: excavating bed of the well foundation(10) on a worktable of a boat; excavating rock with underwater rock drill to lower FRP frame(11) to some depth; manufacturing FRP frame(11) by fixing horizontal and vertical groove angles(12,13) broadwise and lengthwise; installing bolt housing(15) and adjusting bolt(16) to it at the same distance at the horizontal and vertical intersection point of FRP frame(11) to hold the distance between the FRP frame(11) and well foundation and support them; lowering FRP frame(11) on the excavated rock foundation after connecting a flange joint, overlaying the FRP materials in outer flange joint side, and waterproofing treatment with FRP layers(14); supporting FRP frame(11) on the well foundation with adjusting bolt; chipping the well foundation surface and removing corroded surface in a dry process; lowering and fixing built-up steel net between horizontal bolt and nut of the FRP frame(11) and then pouring concrete.
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