This paper investigated systematically the mix proportion of synchronous grouting activated mortar with volume fly ash in the light of orthogonal desgn, and optimized the mix proportion of it.

• 采用正交试验设计方法对长江地下隧道大掺量粉煤灰同步注浆活性单液砂浆配合比进行系统研究和优化设计。