| 摘要 |
<p>PURPOSE: A deep well opening and closing device is provided to prevent the outflow of a grouting material injected in between a deep wall inner wall and an incasing and to prevent the fall of a constant body. CONSTITUTION: A deep well opening and closing device comprises a lower end pipe(20a), a sliding pipe(26), a flat spring(32), an elastic pad(34), and buoyancy bodies(40a,40b). The lower end pipe comprises a first support stepped part(28), an inward hooking stepped part(22), and a critical stepped part(36). The sliding pipe comprises a second supporting stepped part(30) along the circumference of an outer wall and an outward hooking stepped part(24) in the upper side of the outer wall. The flat spring is outwardly bent along the circumference between first and second supporting stepped parts. The elastic pad covers the outside of the flat spring. A buoyancy body is fixed to the outer wall of the sliding pipe in the lower side of the second stepped part.</p> |
