关键词: 模袋固化土, 围埝, 排水板, 等效变换, 准凝聚力

Abstract: During constructing a dam in Tianjin Harbor, the geobag solidified soil technology was applied successfully. Because the soil strength underlying the dam was rather low, the PVC drains were adopted to accelerate the dissipation of pore water and to ensure the stability of the dam. The FEM technique with elastoplastic soil constitutive relations was used to simulate the consolidation process of foundation soil. In the analysis, the axial symmetric problem is transformed into an equivalent plane strain problem, which makes it much easier to carry out. The functions of the geotextile consisting of the geobag are considered by increasing the cohesion of the solidified soil and providing reinforcement to the structure. The load is applied step by step; the settlement and pore water pressure at the central settlement of the foundation and the lateral displacement at the edges of the foundation were calculated. The calculated results coincide well with the field investigation data.

Key words: geobag solidified soil, dam, PVC, settlement, lateral displacement, pore water pressure