| 摘要 |
<p>PURPOSE:To safely and effectively lay pipes, etc., under the ground. CONSTITUTION:An earth retaining frame 10 is a frame body which is opened upward and downward, and forward and rearward, and which holds side plates 12, 12 for covering the inside wall faces of a groove excavated in the ground surface at specified intervals by holding members 24A, 24A, 24B, 24B. Besides, the retaining frame 10 has a traction part at its front. At the time of use, the retaining frame 10 is arranged in the groove, and the groove is excavated forward ahead of the retaining frame 10 while operations such as piping, etc., are performed in the inside covered with the retaining frame 10. Further, the groove is excavated forward to the development of the work such as piping, etc., and the groove in the rear of the retaining frame 10 in which piping, etc., are completed, is filled up with earth and sand.</p> |
