朱幸科,谢万东.基于三维有限元的DCM平面布置对边坡稳定的影响[J].水运工程,2024,(3):171-177
基于三维有限元的DCM平面布置对边坡稳定的影响
Influence of DCM layout on slope stability based on 3D finite element method
  
DOI:
中文关键词:  三维有限元  DCM  平面布置  边坡稳定
英文关键词:3D finite element  DCM (deep cement mixing)  layout patterns  slope stability
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作者单位
朱幸科 中交第四航务工程勘察设计院有限公司广东 广州 510230 
谢万东 中交第四航务工程勘察设计院有限公司广东 广州 510230 
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中文摘要:
      在应用于边坡稳定问题时,DCM(深层水泥搅拌桩)的平面布置形式直接关系到其受力的合理性,进而影响边坡的稳定和安全。针对当前工程实践中采用不同DCM平面布置形式解决边坡稳定问题时,其受力机理仍存在一定程度的认识不足,基于三维有限元方法,结合不同的DCM平面布置形式(桩式、横墙壁式、纵墙壁式、格栅式),对加固后边坡从整体稳定、位移和应力等方面进行分析,探讨采用不同DCM平面布置形式加固边坡后的位移和应力分布规律及特点。研究表明:纵墙壁式和格栅式布置相对于桩式布置,边坡整体稳定安全系数显著提高,位移和应力明显减小且分布更为合理,其中纵墙壁式布置优势最为明显。
英文摘要:
      While applied to improve the slope stability,layout of DCM (deep cement mixing) is directly related to the rationality of the structure,which in turn affects stability and safety of the slope.As for current engineering practice,it is noted that there is still a certain misunderstanding of the stress mechanism on condition that different DCM layouts are adopted to improve slope stability.Based on 3D finite element method and combined with different layout patterns of DCM (in columns,latitude walls,longitude walls and grids),overall stability,displacement and stress of the reinforced slope are analyzed.Displacement and stress distribution laws of the reinforced slope with different DCM layouts are studied.The research shows that DCM in longitude walls and grids are significantly improving the overall stability safety factor of the slope,reducing the DCM displacement and stress and making their distributions more reasonable compared with DCM arranged in columns.Of all the comparing layout patterns,DCM in longitude walls has the greatest advantages.
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