| 摘要 |
PURPOSE: A Backflow preventive grouting device for installing a borehole seismometer and a borehole grouting construction method using the same are provided to prevent the backflow of a grouting material and to reduces costs and environmental contamination by effectively preventing the leakage of a grouting material, air, and water. CONSTITUTION: A Backflow preventive grouting device for installing a borehole seismometer comprises a rod connecting plug (31), an upper plug (32), an upper backflow preventive valve (33), an upper packer (34), a lower backflow preventive valve (35), and a lower packer (36). The rod connecting plug installs a grouting device (30) and connects a rod to inject a grouting material. The upper plug is inserted with the rod connecting plug. The upper backflow preventive valve prevents backflow inside the grouting device. The upper packer accepts the upper plug and the upper backflow preventive valve. The lower backflow preventive valve prevents backflow inside the grouting device with the upper backflow preventive valve. The lower packer accepts the lower backflow preventive valve and is joined to the upper packer. |
