不均匀地层中刚性桩复合地基变形及加固措施分析  

Analysis of Deformation and Reinforcement Measures for Rigid Pile Composite Foundation In-inhomogeneous Strata

作　　者：高钰[1] 王金昌[1] Gao Yu;Wang Jinchang(Institute of Transportation Engineering,Zhejiang University,Hangzhou 310030,China)

机构地区：[1]浙江大学交通工程研究所,杭州310030

出　　处：《科技通报》2024年第1期71-78,105,共9页Bulletin of Science and Technology

基　　金：浙江省交通运输厅项目(ZJXL-JTT-202201A);浙江省交通运输厅项目(202303)。

摘　　要：刚性桩复合地基凭借其工后沉降小、施工周期短、整体稳定性强、社会经济效益高等优势,逐渐得到广泛应用,但也伴随着一些工程问题,如在不均匀地层下刚性桩复合地基路堤容易出现稳定性问题。本文针对不均匀地层下刚性桩复合地基典型工程案例展开研究,采用有限元软件建立三维模型,揭示改进方案前后不均匀地层下刚性桩复合地基的变形规律,研究3种加固方式对于刚性桩复合地基稳定性的增强效果。结果表明:不均匀地层下刚性桩复合地基会产生偏应力进而引起路堤差异沉降,结构稳定性较差,改进方案可以有效降低路堤沉降,提高结构整体稳定性,横梁加固可以有效提高刚性桩复合地基的水平稳定性。Rigid pile composite foundations are gradually being widely used due to the advantages of small post-work settlement,short construction period,strong overall stability and high socio-economic benefits.It is also accompanied by a number of engineering problems with rigid pile composite foundations under inhomogeneous strata being prone to stability problems.A typical case of rigid pile composite foundation in inhomogeneous strata is studied,and a three-dimensional model is established using finite element software to reveal the deformation law of rigid pile composite foundation in inhomogeneous strata before and after the improvement scheme.In addition,the enhancement effect of three reinforcement methods on the stability of rigid pile composite foundations is also investigated.The results show that the rigid pile composite foundation in inhomogeneous strata will produce partial stress and cause uneven settlement,and the structural stability is poor.The improvement scheme can effectively reduce the embankment settlement and improve the overall stability of the structure.The crossbeam reinforcement can effectively improve the horizontal stability of the rigid pile composite foundation.

关 键 词：不均匀地层 刚性桩复合地基 变形规律 有限元 加固措施 

分 类 号：TU44[建筑科学—岩土工程]