级配碎石基层塑性变形预估模型  

Prediction Model for Plastic Deformation of Graded Crushed Stone Base

作　　者：刘广坤 陈峙峰 郭宏伟 李小东 陈忠达[5] LIU Guangkun;CHEN Zhifeng;GUO Hongwei;Li Xiaodong;CHEN Zhongda(Zhongzhou Road and Bridge Construction Co Ltd Henan,Zhoukou 466002,China;Highway Survey and Design Institute of Zhoukou,Zhoukou 466000,China;Henan Hongsheng Engineering Supervision Co Ltd,Zhoukou 466000,China;Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China;Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi’an 710064,China)

机构地区：[1]河南中州路桥建设有限公司,河南周口466002 [2]周口市公路勘察设计院,河南周口466000 [3]河南宏盛工程监理有限公司,河南周口466000 [4]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [5]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《土木工程与管理学报》2022年第6期66-70,共5页Journal of Civil Engineering and Management

基　　金：陕西省交通运输厅科技项目(16-05K)。

摘　　要：基于Pérez永久变形预估模型,以初始塑性应变为因变量,建立了包含荷载作用次数和级配碎石厚度的塑性变形预估模型;根据塑性变形试验结果对模型系数进行了标定;基于等效换算原理,建立了0.7 MPa标准轮压ps下的第60 min的塑性变形量d60,ps等效转化为p应力水平下第60 min的塑性变形量d60,p的关系;应用分层总和法的原理,最终建立了级配碎石基层塑性变形预估模型,并进行工程实例应用分析。结果表明:级配、含水率、应力水平几乎对模型系数没有影响,级配碎石基层塑性变形预估模型具有通用性,能客观反映级配碎石基层塑性变形发展规律,可供沥青路面级配碎石基层的结构设计参考。Based on the permanent deformation prediction model established by Pérez,the initial plastic strain is proposed as the dependent variable and the initial plastic strain prediction model including the number of loads repetition and the thickness of graded crushed stone(GCS)is established.Model coefficient of the prediction model were calibrated by using test results of plastic deformation of GCS.According to the principle of equivalent conversion,the plastic deformation in the 60th min under the standard wheel pressure of 0.7 MPa(d60,ps)and the plastic deformation in the 60th min under the stress of p(d60,p)was established.Finally,the prediction model for plastic deformation of GCS base was established based on the principle layer-wise summation method,and analyzed by engineering example.The results show that the aggregate gradation,moisture content and load stress have almost no effect on model coefficients,and the prediction model for plastic deformation of GCS base is universal;the developed model can objectively reflect the development law of plastic deformation of GCS base,which can serve for guiding the structural design of asphalt pavement with GCS base.

关 键 词：级配碎石 路面基层 塑性变形 预估模型 荷载应力 塑性变形试验 

分 类 号：U414[交通运输工程—道路与铁道工程] U416.214