地基改良技术对基底抗冲刷稳定性的有限元分析

Finite Element Analysis of Anti-scour Stability of Foundation Improvement Technology

为了提高土工织物管系统整体的稳定性,本文使用Plaxis对四个方法案例进行有限元分析,模拟土工织物管系统的外部故障,评估预防措施的性能。分析结果表明:与传统土工织物管的施工方法相比,采用地基改良技术后,极限水平位移相对较小,但整体稳定安全系数没有显著提高。应用凹陷基底结构法和砾石改良地基法之后,能在一定程度上改善土工织物管系统支撑路堤的整体性能和稳定性。但两种方法的组合却不能提高土工织物管系统的整体性能,反而会增加施工成本,耽误施工进度。整体而言,凹陷基底结构法在降低极限水平位移和提高整体稳定安全系数方面是一个相对更好的选择。

In order to improve the overall stability of the geotextile pipe system,this paper uses Plaxis to perform finite element analysis on four method cases to simulate the external failure of the geotextile pipe system and evaluate the performance of preventive measures.The analysis results show that compared with the traditional construction method of geotextile pipe,the ultimate horizontal displacement is relatively small after the foundation improvement technology is adopted,but the overall stability safety factor is not significantly improved.The overall performance and stability of the embankment supported by the geotextile pipe system can be improved to a certain extent after the application of the concave base structure method and the gravel modified foundation method.However,the combination of the two methods can not improve the overall performance of the geotextile pipe system,but will increase the construction cost and delay the construction progress.Overall,the concave base structure method is a relatively better choice in reducing the limit horizontal displacement and improving the overall stability safety factor.