大桥主塔承台施工中混凝土水化热自动监控方法
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摘要
使用常规混凝土水化热监控方法对大桥主塔承台进行连续性自动监控时,存在监控参数误差大的不足,为此提出大桥主塔承台施工中混凝土水化热自动监控方法。基于测定传感器的选取与布置,以及导热方程初始化程序设计,完成导热模型的建立与边界条件的确定,实现混凝土水热化自动监控体系的构建;依托混凝土配合比及材料热特性的确定,输入导热模型控制参数,输出自动监控结果,实现大桥主塔承台施工中混凝土水化热自动监控。试验数据表明,提出的自动监控方法较常规方法,监控参数准确率提升42.64%,适合于大桥主塔承台施工中的混凝土水化热自动监控。
Using conventional concrete hydration heat monitoring methods of bridge main tower caps during continuous automatic monitoring,it exists the shortage of the great error in the monitoring parameters,therefore put forward the construction of the bridge main tower of concrete hydration heat automatic monitoring method.Based on determination of sensor selection and layout,and heat conduction equation cshialization program design,completed the establishment of the model of thermal conductivity and the boundary conditions are determined,thermalization concrete water automatic monitoring system construction;Depends on the concrete and the material of the determination of thermal properties and thermal conductivity of selecting parameters of the model,the output according to the results of the automatic monitoring,implementation in the construction of the concrete hydration heat bridge main tower automatic monitoring.The experimental data show that the proposed automatic monitoring method is more accurate than the conventional method,and the accuracy of monitoring parameters is increased by 42.64%,which is suitable for the automatic monitoring of concrete hydration heat during the construction of the main tower bearing platform of the bridge.
Using conventional concrete hydration heat monitoring methods of bridge main tower caps during continuous automatic monitoring,it exists the shortage of the great error in the monitoring parameters,therefore put forward the construction of the bridge main tower of concrete hydration heat automatic monitoring method.Based on determination of sensor selection and layout,and heat conduction equation cshialization program design,completed the establishment of the model of thermal conductivity and the boundary conditions are determined,thermalization concrete water automatic monitoring system construction;Depends on the concrete and the material of the determination of thermal properties and thermal conductivity of selecting parameters of the model,the output according to the results of the automatic monitoring,implementation in the construction of the concrete hydration heat bridge main tower automatic monitoring.The experimental data show that the proposed automatic monitoring method is more accurate than the conventional method,and the accuracy of monitoring parameters is increased by 42.64%,which is suitable for the automatic monitoring of concrete hydration heat during the construction of the main tower bearing platform of the bridge.
引文
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[3] 万华,谭振华.南洞庭特大桥主桥承台大体积混凝土防裂施工技术[J].中外公路,2017,4(3):141-144.
[4] 刘继,周勇军,杨勃,等.连续刚构桥承台水化热有限元分析与控制[J].中外公路,2017,3(4):121-125.
[5] 彭涛.大跨度连续钢构主墩承台施工技术研究[J].公路交通科技(应用技术版),2016,4 (3):16-19.
[6] 杨牧盘.基于主动温控技术的塔座大体积混凝土施工方法[J].公路交通科技(应用技术版),2016(3).
[7] 李振标.西溪河特大桥钢管混凝土拱肋水化热温度场分析[J].铁道建筑,2016,2 (2):36-38.
[8] 佘娜,张思颖.低温升低收缩磷渣大体积混凝土温度应力监测数值仿真分析[J].公路工程,2017,42(2):309-313.
[9] 孙增智,田俊壮,石强,等.承台大体积混凝土里表温差梯度与温差应力有限元模拟[J].交通运输工程学报,2016,16(2):18-26.
[10] 谷景涛,王树新,吴文涛,等.承台大体积混凝土施工温控技术研究[J].公路,2016,6 (6):186-189.
[11] 秦宇,张秋信,余毅.平塘特大桥中塔承台大体积混凝土温控技术[J].世界桥梁,2018,1 (2):186-189.
[12] 张永健,李鸥.洞庭湖大桥承台大体积混凝土温控试验研究[J].桥梁建设,2016,46(4):45-50.
[13] 杨益,杜凯,朱宁超.大体积混凝土无线温控监测系统设计及应用[J].自动化与仪器仪表,2017(6):121-123.
[14] 王永涛,朱珺.基于AD7763的预应力混凝土管桩声纳扫描检测系统设计[J].电子设计工程,2017,25(20):174-178.
[15] 夏雄,吴炎,胡坤,等.大体积混凝土温度演变规律研究[J].混凝土,2017(6):152-156.