风化花岗岩超高填方路堤变形规律研究

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关键词：超高路堤；风化花岗岩；FLAC3D；变形规律中图分类号： ；U416 文献标志码：A

文章编号：1001-5922（2025）05-0131-05

Abstract：Taking the weathered granite filer of theultra-high fillembankment from Huadu to Conghua sectionof the Guangzhou-Lianzhou Expresswayas the research object，the characteristics of the filer were studied through experiments，the numerical model was established byFLAC3D basedonthe ultra-high embankment profileof the K4 462 ＼～ K4 900 section，the vertical displacementof thefield monitoring wasused toverifythe numericalmodel，andthedeformationlawoftheweathered granitefillembankment wasstudied.Theresultsshowedthatwiththeincreaseof thenumberof fillinglayers，theswellingphenomenonoccuredonboth sidesof theembankment，andthehorizontaldiferencebetween the monitoring pointsonboth sides became larger，andthe horizontal displacement directionofthe monitoring pointson both sides was opposite with the DK4 640-6 monitoring point as the dividing line.With the increase of depth，the stress increased stepbystep，and the vertical stress reached1.45MPawhen filing tothe12th floor.The numericalsimulation results werebasicallyconsistent with thefield monitoring results，and the diffrence between them was only1mm，and the research results have theoretical significance for the filing and operation of ultra-high fillembankments.

Key words ：super high embankment ； weathered granite； FLAC3D ；deformation law

花岗岩在我国分布广泛，主要分布在东南及华南地区，全风化状态时具有高压缩性、不均匀性及遇水易软化、崩解等特性[1]，填料难以压实，从而产生路基不均匀沉降、侧向变形、路面产生裂缝等各种沉降变形问题[2-3]。（剩余5659字）