风化花岗岩超高填方路堤变形规律研究  

Study on the deformation law of weathered granite ultra-high fill embankment

作　　者：蒋正舜 张国才[2] 段诚仕 郭剑雄 JIANG Zhengshun;ZHANG Guocai;DUAN Chengshi;GUO Jianxiong(CCCC Fourth Harbor Engineering Co.,Ltd.,Guangzhou 510230,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China)

机构地区：[1]中交四航局第一工程有限公司,广东广州510230 [2]中交四航工程研究院有限公司、中交交通基础工程环保与安全重点实验室,广东广州510230

出　　处：《粘接》2025年第5期131-134,138,共5页Adhesion

基　　金：中交第四航务工程局有限公司产学研科技项目(项目编号:2020-01)。

摘　　要：以广州至连州高速公路花都至从化段超高填方路堤风化花岗岩填料为研究对象,通过试验对填料开展特性研究,应用FLAC~(3D)以K4+462~K4+900段超高路堤剖面为原型建立数值模型,并利用现场监测的竖向位移量对数值模型进行了验证,开展风化花岗岩填方路堤变形规律研究。结果表明,随着填筑层数增加,路堤两侧出现鼓胀现象,两侧的监测点水平差异性越来越大,以DK4+640-6监测点为分界线,两侧监测点水平位移方向相反;随着深度的增加,应力逐级增加,填筑至12层时,竖向应力达到1.45 MPa;数值模拟结果与现场监测结果基本一致,二者相差仅为1 mm,其研究成果对超高填方路堤填筑及运营都具有理论意义。Taking the weathered granite filler of the ultra-high fill embankment from Huadu to Conghua section of the Guangzhou-Lianzhou Expressway as the research object,the characteristics of the filler were studied through experiments,the numerical model was established by FLAC3D based on the ultra-high embankment profile of the K4462~K4900 section,the vertical displacement of the field monitoring was used to verify the numerical model,and the deformation law of the weathered granite fill embankment was studied.The results showed that with the increase of the number of filling layers,the swelling phenomenon occured on both sides of the embankment,and the horizontal difference between the monitoring points on both sides became larger,and the horizontal displacement direction of the monitoring points on both sides was opposite with the DK4640-6 monitoring point as the dividing line.With the increase of depth,the stress increased step by step,and the vertical stress reached 1.45 MPa when filling to the 12th floor.The numerical simulation results were basically consistent with the field monitoring results,and the difference between them was only 1 mm,and the research results have theoretical significance for the filling and operation of ultra-high fill embankments.

关 键 词：超高路堤 风化花岗岩 FLAC~(3D) 变形规律 

分 类 号：TQ172.41[化学工程—水泥工业] U416[化学工程—硅酸盐工业]