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文章针对侧岸约束下高填路基稳定性问题,分别采用二维的两种计算方法——极限平衡Spencer法和有限元强度折减法对其安全系数进行计算,结果表明有限元强度折减法可以替代Spencer法。建立侧岸约束下高填路基实体模型,采用有限元强度折减法计算不同冲沟岸坡坡度的三维安全系数并与Spencer法的二维安全系数比较,通过回归分析求得侧岸约束下高填路基稳定性三维效应系数。结果表明:岸坡坡度越陡,三维效应系数越大,越有利于路基稳定。
Aiming at the problem of high embankment stability under the constraint of side bank, the paper calculates the safety coefficient by using two-dimensional two-dimensional calculation method, the limit equilibrium Spencer method and the finite element strength reduction method, respectively. The results show that the finite element strength reduction method can replace Spencer method. The three-dimensional safety factor of slope with different gully bank slope is established by finite element strength reduction method. The two-dimensional safety factor of Spencer method is compared with that of Spencer method. Roadbed stability 3D effect coefficient. The results show that the steeper the bank slope, the larger the three-dimensional effect coefficient is, the more conducive to roadbed stability.