戈壁大温差区水稳砂砾基层路面拱胀开裂行为及预防措施研究  

Arch-cracking Behavior and Preventive Measures of Cement-stabilized Gravel Base Pavement in Gobi Large Temperature Difference Area

作　　者：文良 王正伟 刘荆泉 张元宁 黄维蓉[2] 郭小宏[2] 任海生 Wen Liang;Wang Zhengwei;Liu Jingquan;Zhang Yuanning;Huang Weirong;Guo Xiaohong;Ren Haisheng(Xinjiang Road&Bridge Nanjiang Engineering Construction Co.,Ltd.,Xinjiang 844099,China;Chongqing Jiaotong University,Chongqing 400074,China;Intelligent Transport System Research Center,Southeast University,Nanjing 211189,China)

机构地区：[1]新疆路桥南疆工程建设有限公司,新疆844099 [2]重庆交通大学,重庆400074 [3]东南大学智能运输系统研究中心,南京211189

出　　处：《科技通报》2024年第12期71-75,共5页Bulletin of Science and Technology

基　　金：新疆交通科技项目(E1230043)。

摘　　要：为明晰戈壁大温差地区水稳砂砾基层沥青路面的拱胀开裂病害机理,本文根据依托项目的公路结构构建道路结构拱胀开裂仿真模型,研究胀缝间距、路表极端温差以及水稳基层矿料级配等条件对道路拱胀开裂的影响机制,进而提出了对应的预防措施。结果表明:戈壁地区的大温差条件是诱发道路拱胀开裂的重要因素,而胀缝间距与道路拱胀开裂程度呈现正线性关系。推荐该地区的水稳基层矿料级配优先选择骨架空隙型,施工时间为春秋季,胀缝的间距设计为50 m,宽度为2.35~2.90 cm,材料为冷拌树脂类材料。To investigate the mechanism of arch cracking in cement-stabilized gravel base asphalt pavements in the gobi region with large temperature differences,a simulation model of arch cracking in road structures was established according to the highway structure of the dependent project.The influence of expansion joint spacing,road surface temperature differences,and base layer grade on the arch cracking of the road was examined.Based on the findings,corresponding preventive measures were proposed.Results indicate that the significant temperature differences in the Gobi region are a primary factor inducing arch cracking in the roads.The degree of arch cracking has a positive linear relationship with the spacing of expansion joints.Therefore,it is recommended that in this region,the mineral gradation of the cement-stabilized base course should preferably be of the skeleton gap type,and construction should take place in spring and autumn.Expansion joint spacing should be designed at 50 meters,with joint widths of 2.35-2.90 cm,using cold-mixed resin materials for expansion joints.

关 键 词：戈壁大温差地区 水稳砂砾基层 道路拱胀 数值模拟 预防措施 

分 类 号：U416[交通运输工程—道路与铁道工程]