A grouting material composed of water glass and phosphoric acid was proposed aimed to the formation reinforcement problem during shield chamber opening. Then the gelation time of the material and the interfacial shear strength between the solidified grouting material and metal was analyzed. Finally the grouting material was applied in practical engineering. The test results show that when the pH value of phosphoric acid is constant, the gelation time of the mixture of phosphoric acid and water glass gradually decreases as the Baume degree of water glass increases. When the Baume degree of water glass is the same, as the pH value of phosphoric acid decreases, the gelation time of the mixture of phosphoric acid and water glass gradually increases. As the Baume degree of water glass increases, the interfacial shear strength between the solidified grouting material and metal gradually increases. Under the same concentration of water glass, the lower the pH value of phosphoric acid, the smaller interfacial shear strength between the solidified grouting material and metal.