静动荷载作用下加筋土桥台变形特性研究  

Study on Deformation Characteristics of Reinforced Soil Abutment Under Static and Dynamic Loads

作　　者：董彦莉 张浩东 赵致艺 张军 冯浩然 DONG Yanli;ZHANG Haodong;ZHAO Zhiyi;ZHANG Jun;FENG Haoran(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Key Laboratory of Highway Construction and Maintenance Technology in Loess Region,Ministry of Transport,Shanxi Transportation Research Institute,Taiyuan 030006,China;Guoneng Shuohuang Railway Development Co.,Ltd.,Cangzhou 062350,China)

机构地区：[1]中北大学环境与安全工程学院,山西太原030051 [2]山西交通科学研究院交通运输部黄土地区公路建设与养护技术重点实验室,山西太原030006 [3]国能朔黄铁路发展有限责任公司,河北沧州062350

出　　处：《中北大学学报(自然科学版)》2025年第2期188-196,共9页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52278360);山西省黄土地区公路建设与养护技术国家交通行业重点实验室开放基金资助项目(KLTLR-Y23-2);山西省自然科学基金资助项目(202403021211082)。

摘　　要：加筋土桥台具有工程造价低、易于施工、绿色环保等优点,并且能解决传统桥台的桥头跳车的问题,因此得到了推广与应用。本文以一座现有的加筋土桥台为原型,通过FLAC3D有限差分软件进行数值模拟,分析了静荷载与车辆动荷载对不同面板形式的加筋土桥台沉降及侧向位移的影响。研究结果表明,随着荷载的增大,静荷载作用下桥台沉降与面板位移均明显增大,但动荷载作用下的桥台沉降与面板水平位移变化不是很明显;加筋土桥台设置筋材加密区能够有效减小静荷载作用下的桥台面板水平位移;在本文所研究的小型车辆重量下,车辆行驶速度不是影响桥台沉降量的主要因素,且车辆行驶速度对桥台面板水平位移的影响也很有限;加筋土桥台设置混凝土面板能够有效减小桥台面板的水平位移,且无论是在静荷载作用下还是动荷载作用下,有混凝土面板的土工格栅平铺式加筋土桥台都比其它两种桥台控制桥台面板水平变形的效果更好。研究结果可为加筋土桥台的工程设计及维护使用提供一定参考。Reinforced soil abutment has the advantages of low engineering cost,easy construction,green environmental protection,etc.,and can solve the problem of traditional abutment head jump,so it has been popularized and used.Using an existing reinforced soil abutment as a prototype,the effects of static load and vehicle dynamic load on the settlement and lateral displacement of reinforced soil abutment with different panel forms were analyzed by numerical simulation using FLAC3D finite difference software.The results show that with the increase of load,the abutment settlement and panel displacement increase obviously under static load,but the change of abutment settlement and panel horizontal displacement under dynamic load is not obvious.The horizontal displacement of the slab of the reinforced soil abutment under static load can be effectively reduced by setting the reinforcement filler area.At the weight of the small vehicle studied in this paper,the vehicle speed is not the main factor affecting the settlement of the abutment,and the influence of the vehicle speed on the horizontal displacement of the abutment panel is limited.The horizontal displacement of the reinforced soil abutment can be effectively reduced by install-ing concrete panels,and the geogrid flat reinforced soil abutment with concrete panels is more effective than the other two types of abutments in controlling the horizontal deformation of the abutment panels,no matter under static load or dynamic load.The research results can provide some reference for the engineer-ing design and maintenance of reinforced soil abutment.

关 键 词：土工合成材料加筋土 静动荷载 加筋土桥台 荷载工况 变形特性 

分 类 号：TU43[建筑科学—岩土工程] U443.21[建筑科学—土工工程]