摘要
福建某地区土石混填超高路堤,地质及地形条件复杂,坡脚处存在软弱层,稳定性和变形性问题突出。文章依托该工程项目,综合考虑实际地质情况和经济效益,首先利用混凝土桩对软弱层进行加固处理,在有限元计算结果的基础上,逐步完善加固方案,分别逐步设置了抗滑桩、铺设土工格栅、对土石混合料强夯处理等加固措施。综合分析了各方案下的加固效果(塑性滑动面、安全系数和位移),分析结果表明,这种处理方案能够满足超高路堤变形和稳定的要求。
An ultra-high embankment filled with earth-rock mixture is located an area with the complex geological and topographic conditions in Fujian. There is a weak layers at the foot of the slope,and the problem of stability and deformation is prominent. Considering the actual geological conditions and economic benefits,the concrete pile was first used to reinforce the weak layer. On the basis of the calculated results under ABAQUS,the reinforcement scheme was gradually implemented. The reinforcement measures,including anti-slide pile,geogrids,and strong compaction,were gradually set up. The reinforcement effects( plastic sliding surface,safety factor and displacement)under each scheme was analyzed synthetically,and the results showed that this treatment scheme can meet the engineering requirements of deformation and stability of the ultra-high embankment.
引文
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