樁-土復(fù)合路基廣泛應(yīng)用于我國(guó)高速鐵路工程建設(shè)。為研究高速列車運(yùn)行引起的樁-土復(fù)合路基地面振動(dòng),本文建立了包含樁體、樁帽和墊層在內(nèi)的復(fù)合路基3維有限元模型,通過與現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)對(duì)比驗(yàn)證了模型的有效性。在此基礎(chǔ)上,分析了不同車速高鐵荷載作用下地面振動(dòng)及其與軌道中心間距的衰減規(guī)律。此外,還研究了樁基及樁體彈性模量對(duì)地面振動(dòng)的影響。研究表明,復(fù)合路基中樁體的加固能有效減小地面振動(dòng);另外,減振效果隨著樁體彈性模量的增加而增大。然而,當(dāng)樁體彈性模量超過10 GPa時(shí),進(jìn)一步增大彈性模量就不再明顯增加地面振動(dòng)的減振效果。 

【文章來源】：Journal of Central South University. 2020,27(08)EISCICSCD

【文章頁數(shù)】：10 頁

【文章目錄】：
1 Introduction
2 Modelling approach and validation
    2.1 Mathematical description of train loading
    2.2 Model development
    2.3 Validation
3 Results and discussions
    3.1 Ground vibrations at different train speeds
    3.2 Variation of ground vibrations with distance to track centerline
    3.3 Ground vibration mitigation with piles
    3.4 Vibrations of ground reinforced by piles with different pile elastic moduli
4 Conclusions


【參考文獻(xiàn)】：
期刊論文
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[3]Numerical investigation of piled raft foundation in mitigating embankment vibrations induced by high-speed trains[J]. 付強(qiáng),劉漢龍,丁選明,鄭長(zhǎng)杰.  Journal of Central South University. 2015(11)
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