The stress state of the SB backfill in a full-scale cutoff wall test during the construction and consolidation was simulated by a finite-element model. The applicability of the model was demonstrated by good agreements between modeled and field monitored earth pressures and pore pressure in the backfill. Based on the analyzed results, the backfill consolidation process can be described as a four-staged cycle of load transfer: (1) the effective stress of the backfill increases due to the dissipation of excess pore pressure caused by self-weight consolidation of the backfill; (2) the increased effective stress results in settlement of the backfill and an increase of sidewall friction between the backfill and the sidewall interface; (3) the increased sidewall friction results in the transfer of backfill weight to the sidewalls and a decrease of the consolidation stress on the backfill; and (4) the decreased consolidation stress attenuates the decrease of excess pore pressure, influencing the subsequent consolidation. The cycle from (1) to (4) continues until the consolidation is completed.

通过有限元模型模拟了SB回填土在全尺寸防渗墙试验中在施工和固结过程中的应力状态。模型的适用性通过模拟和现场监测的回填土压力和孔隙压力之间的良好一致性得到证明。根据分析结果，回填土固结过程可以描述为一个四阶段的荷载传递循环：（1）由于回填土自重固结引起的超孔隙压力的消散，回填土的有效应力增加。 ; (2)有效应力增加导致回填土沉降，回填土与侧壁界面之间的侧壁摩擦增加；(3) 增加的胎侧摩擦力导致回填土重量转移到胎侧和减少回填土的固结应力；(4)固结应力的降低减弱了超孔压的降低，影响了后续固结。从 (1) 到 (4) 的循环一直持续到合并完成。