摘要
针对传统的极限平衡分析法不能较好地反映土工织物与土间的变形协调关系,采用非线性有限元法探讨了多层土工织物加固填土路基的变形与破坏特征。结果表明,在假定土工织物与土之间无相对位移条件下,土工织物的铺设层数对路基破坏面的位置影响不明显,路基的潜在破坏面近似为一通过坡趾处的圆弧面;离路基顶面越近,土工织物上的轴力越小;土工织物位于路基中部作用较大,而位于路基坡脚的轴力大为减小;铺设土工织物后,路基的稳定性提高较大,铺设层数越多,路基的安全系数增幅越大;铺设于路基体内的土工织物对减小地基体内的水平位移作用有限,实际工程中需采用其他措施约束地基体内水平位移的处理。
A road embankment reinforced with layered geotextiles is analyzed with nonlinear finite element method. It is shown that the failure surface of embankment is a curved surface across the toe of embankment, which is little influenced by the number of layer of geotextiles. The axial force of geotextile become less when geotextile is set on the place near the top surface or toe of embankment. Furthermore,the stability of embankment can be enhanced with geotextile effectively. It is also shown that there is no obvious effect of reducing the lateral displacement of foundation with geotxtile only, which indicated that other measures should be used to reduce the lateral displacement of foundation if necessary.
出处
《水电能源科学》
北大核心
2009年第4期148-150,154,共4页
Water Resources and Power
基金
安徽省高等学校省级自然科学研究基金资助项目(KJ2008B259)
住房和城乡建设部研究开发基金资助项目(2009-K4-24)
关键词
非线性有限元
土工织物
加固填土
路基
轴力
稳定性
变形
nonlinear finite element method
geotextile
reinforced filling
embankment
axial force
stability
displacement
