爆破挤淤堤稳定性计算方法的适用性

针对软土地基爆破挤淤海堤整体稳定的问题,进行了稳定计算方法适用性的研究。基于瑞典圆弧滑动法和简化毕肖普法的计算公式及最危险滑动面搜索的基本原理,将两种计算方法应用于某工程爆破挤淤堤的稳定计算中,对比分析了两种计算方法得到的最危险滑动面形态和土条受力情况。结果表明:软土地基中采用爆破挤淤法筑堤,其稳定计算若采用瑞典圆弧滑动法计算,得到的安全系数偏小且误差较大;而采用简化毕肖普法计算,计算结果更接近土体实际受力情况。因此,软土地基爆破挤淤海堤整体稳定宜采用简化毕肖普法进行计算,为软基条件下爆破挤淤堤设计提供了重要的参考。

Applicability of calculation method for stability of blasting compaction embankment

The applicability of calculation method is researched to solve the problem of stability of blasting compaction embankment in soft foundation.Based on calculation formulas of Fellenius circular sliding method and simplified Bishop method and basic principle for searching the most dangerous sliding surface,the two calculation methods are applied to calculate stability of blasting compaction embankment.The most dangerous sliding surface form and pressure condition of soil strip are comparatively analyzed by the two calculation methods.The results show that when blasting compaction embankment is built in soft foundation,stability coefficient obtained by Fellenius circular sliding method is smaller and of larger error.But stability coefficient obtained by simplified Bishop method is closer to the actual condition.Therefore,simplified Bishop method is a better method to calculate stability of blasting compaction embankment in soft foundation.It provides an important reference for blasting compaction embankment design in soft foundation.