Nailing Method using Self expanding Grout`s Sperate Injection Approach

摘要

PURPOSE: A soil nailing method using a manner of separately injecting an expanding grout material is provided to save expansion agent and increase ground strength by injecting an expanding grout material mixed with cement to the lower end of a hole according to ground condition. CONSTITUTION: A soil nailing method using a manner of separately injecting an expanding grout material comprises following steps. A plurality of holes are formed on the ground. Nails are respectively installed in each of the holes. Bonding agent, which is formed by cement and expansion agent, and water are filled in a part of the hole in a ratio of 2:1. The expansion agent includes Al2O3, Ca0 and SO3. 1~40weight% of an expanding grout material is injected to the bonding agent. The mixture of cement and water is separately injected to the other part of the hole.