Dispersing type foaming agent prepared based on two-step method and used for shield tunneling as well as preparation method and application of dispersing type foaming agent

• Main Authors: SONG QIAN, YUAN ZIQI, CHEN QIANBAO, WANG CHUNHUA, HU YANG, YUN JO-WON, SU WEIBIN, MEI XIAOJUN
• Format: Patent
• Language: Chinese; English
• Published: 19.09.2023
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; SHAFTS; TUNNELS

The invention discloses a shield dispersing type foaming agent prepared based on a two-step method, and the shield dispersing type foaming agent comprises the following raw materials in parts by weight: 100-120 parts of 2-(diethanolamine) sodium ethanesulfonate; 90 to 100 parts of oxalic acid; 435 to 547 parts of an anionic surfactant; and 290 to 346 parts of an ampholytic surfactant. The preparation method comprises the following steps: firstly, carrying out esterification reaction on sodium 2-(diethanolamine) ethanesulfonate and oxalic acid to generate a polyanionic dispersing agent, and then blending the polyanionic dispersing agent with an anionic surfactant and an ampholytic surfactant, so as to prepare the dispersing type foaming agent for shield tunneling based on a two-step method. The dispersing and foaming agent has dispersing and foaming performance, is high in foaming times, good in foam stability and excellent in cohesive soil dispersing performance, and can remarkably improve cohesiveness and fl