Remedial Reinforcement Methods for Seepage Damage in Foundation Pits Near Rivers and Streams

A riverbank foundation pit utilized a triaxial cement-soil mixed wall for water seepage prevention. During excavation, water gushing, sand effusion, and seepage destruction occurred. After several unsuccessful attempts at sealing and remediation, a combined technique of dual-liquid grouting with jet grouting piles was proposed. The issues of water and sand gushing were solved, and the remediation and reinforcement of the seepage control were accomplished, without adversely affecting the pit or its surrounding environment, thereby ensuring the continuation of subsequent excavation works. Taking this project as a case study, the process of remediation and reinforcement undertaken for the seepage damage of this foundation pit is outlined, and the technical key points of the dual-liquid jet grouting piles technique are summarized.