砂卵石富水地层注浆加固技术

The injecting reinforcement technique of sandy gravels watery strata

结合工程概况,介绍了工程地质和水文地质条件及“PBA”洞桩法的施工方法,指出了砂卵石地层中进行导洞开挖的施工难点,并对超前小导管注浆的设计与施工过程进行了阐述,以达到加固地层保证隧道的施工安全和周边环境稳定的目的。

Combined with the project general situation,it introduces the project geology and the construction methods of PBA hole pile method,points out the construction difficulty of pilot tunnel excavation in sandy gravels strata, and represents the design of leading ductule injecting and the construction process,to get the purpose of reinforcing strata,assuring the construction safety of tunnel and the stability of peripheral(circumstance).