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在检算软土路堤的稳定时,考虑由于填土荷重对基底软土的压密作用,使基底软土得到部分固结,从而提高了软土的抗剪强度。因此在检算公式中把这部分抗剪力也计算在内,这就是固结有效应力检算公式的理论基础。这一理论通过工地试验和实践,证明比较切合实际。铁道部第四勘测设计院在大沙线阳新软土路堤工点作过填筑路堤试验,当路堤填筑高度达到使路基圆弧滑动面开始开裂、坡脚外基底软土开始隆起时,即为处于极限平衡状
In the calculation of the stability of soft soil embankment, it is considered that the consolidation of base soft soil due to the compacting effect of filling load on the foundation soft soil, so as to improve the shear strength of soft soil. Therefore, in the formula to calculate this part of the shear force is also included, and this is the theoretical basis for calculating the effective stress consolidation formula. This theory proves to be more realistic through field tests and practices. The Fourth Survey and Design Institute of Ministry of Railways tested the embankment at Yangxin soft soil embankment on Dasha Line. When the embankment filling height reached the point where the embankment’s circular arc sliding surface began to crack and the base soft soil outside slope foot started to rise, For the ultimate balance