摘要
为揭示沥青心墙温度特性与结合面质量的关联规律,本研究基于新疆库尔干水利枢纽工程实测数据,分析沥青混凝土心墙的温度变化规律、结合层成型温度影响因素,并通过抗拉、抗弯强度及渗透系数试验评估结合面质量。沥青心墙温度变化符合三阶指数衰减函数;摊铺后一周内温度高于沥青软化点,引发“松塔效应”。结合层温度受环境温度和下层热料温度双重影响,夏季成型最高温度(112.5℃),冬季(95.8℃),中心区域温度较外侧高15.00%~20.00%。结合面抗拉强度、抗弯强度较母材分别下降1.75%~6.14%和4.43%~8.23%(P 0.05),渗透系数增加68.00%~659.00%(P0.05)。综上,现行表面温度控制标准需改进,应建立基于内部温度场时空分布的多参数施工控制体系,研究成果为高寒地区沥青心墙施工质量控制提供了理论支撑。
In order to reveal the correlation between the temperature characteristics of asphalt core walls and the quality of interface bonds,providing a theoretical basis for construction quality control of asphalt core walls in alpine regions.Based on field measurement data from the Xinjiang Kurgan Water Control Project,the temperature variation patterns of asphalt concrete core walls and influencing factors on the formation temperature of interface layers were analyzed.The bond quality was evaluated through tensile strength,flexural strength,and permeability coefficient tests.The temperature variation of the asphalt core wall follows a third-order exponential decay function.Within one week after paving,the temperature remains above the asphalt softening point,triggering a pinecone effect'.The interface layer temperature is influenced by both ambient temperature and the temperature of the underlying hot material.The maximum formation temperature is 112.5 C in summer and 95.8 C in winter,with the central area being 15.00%—20.00%warmer than the outer regions.The tensile strength and flexural strength of the interface decreased by 1.75%—6.14%and 4.43%—8.23%(P<0.05),respectively,compared to the parent material,while the permeability coefficient increased by 68.00%—659.00%(P<0.05).In conclution,the current surface temperature control standards require improvement,and a multi-parameter construction control system based on the spatiotemporal distribution of the internal temperature field should be established.The research results provide theoretical support for the construction quality control of asphalt core wall in alpine region.
作者
潘德优
刘亮
韩德强
郭坚强
杨武
何建新
罗子阳
PAN De-you;LIU Liang;HAN De-qiang;GUO Jian-qiang;YANG Wu;HE Jian-xin;LUO Zi-yang(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang hydraulic engineering Geotechnical and structural engineering technology Research center,Urumqi 830052,China;Xinjiang Kurgan Water Conservancy Hub Project Construction Management Center,Kashgar 844000,China;Tacheng Water Conservancy Design and Research Institute Co.,Ltd.,Tacheng 834700,China)
出处
《新疆农业大学学报》
2025年第4期331-338,共8页
Journal of Xinjiang Agricultural University
基金
新疆维吾尔自治区天山英才科技创新领军人才计划项目(2024TSYCLJ0017)
关键词
现场监测
结合层温度
温度传递规律
沥青混凝土心墙
层间结合机理
on-site monitoring
temperature of the bonding layer
temperature transfer law
asphalt concrete core wall
interlayer bonding mechanism
