| 摘要 |
A caisson chamber is formed on the bottom portion of a body of a caisson as a tightly closed space, and a preceding blade nose portion is suspended from this caisson chamber. Then, flow water is led into the caisson chamber and the caisson is sunk, using the preceding blade nose portion as a guide. Furthermore, the body of the caisson is formed with a multitude of water-passing holes, so that the body in the water is balanced during sinking, the soil pressure of the surrounding ground is countered, the friction is reduced, and a fixing agent is poured through the water-passing holes after the sinking. With this arrangement, even at the large depth, no harmful inclination occurs, an accurate sinking can be performed and a large supporting force can be obtained. |
