The temperature field in a concrete mass was measured during cooling to improve designs for cracking control of high arch dams during construction. Field tests of concrete cooling in a super high arch dam during construction gave real-time data for the concrete temperature during cooling to describe the temperature distribution characteristics and the factors influencing the diffusion. The results show the evolution of the temperature field from a non-uniform distribution to a uniform distribution and the characteristics of the decrease in the concrete temperature which can be generalize into a thermal accumulation stage, thermal release stage and thermal transport stage. Finally, the cracking mechanism along the axial direction of an arch dam was studied basis on the mechanisms during the temperature changes. This study presents ways to control cracking in super high arch dams.
林鹏,胡杭,郑东,李庆斌. 大体积混凝土真实温度场演化规律试验[J]. 清华大学学报(自然科学版), 2015, 55(1): 27-32.
Peng LIN,Hang HU,Dong ZHENG,Qingbin LI. Field tests on the evolution of a real thermal field in concrete. Journal of Tsinghua University(Science and Technology), 2015, 55(1): 27-32.
Aly T, Sanjayan J G. Shrinkage-cracking behavior of OPC-fiber concrete at early-age[J]. Materials and Structures, 2010, 43: 755-764.
[2]
Choi S, Cha S W, Oh B H, et al.Thermo-hygro- mechanical behavior of early-age concrete deck in composite bridge under environmental loadings. Part 1: Temperature and relative humidity[J]. Materials and Structures, 2011, 44: 1325-1346.
[3]
Wetzel A, Herwegh M, Zurbriggen R, et al.Influence of shrinkage and water transport mechanisms on microstructure and crack formation of tile adhesive mortars[J]. Cement and Concrete Research, 2012, 42: 39-50.
[4]
Nara Y, Takada M, Mori D, et al.Subcritical crack growth and long-term strength in rock and cementitious material[J]. International Journal of Fracture, 2010, 164(1), 57-71.
[5]
Kim J K, Han S H, Song Y C. Effect of temperature and aging on the mechanical properties of concrete (Part I): Experimental results[J]. Cement and Concrete Research, 2002, 32: 1087-1094.
[6]
黄达海, 陈彦玉, 王祥峰, 等. 基于分布式光纤测温的特高拱坝温控预报研究[J]. 水利水电技术, 2010(09): 42-46. HUANG Dahai, CHEN Yanyu, WANG Xiangfeng, et al. Study on prediction of temperature control of super-high concrete arch dam with fiber-optic-based distributed temperature sensing[J]. Water Resources and Hydropower Engineering, 2010(09): 42-46.
[7]
吴中如. 水工建筑物安全监控理论及其应用 [M]. 北京: 高等教育出版社,2003. WU Zhongru. Safety Monitoring Theory and its Application of Hydraulic Structures [M]. Beijing: Higher Education Press, 2003.
[8]
朱伯芳. 大体积混凝土温度应力与温度控制 [M]. 北京: 中国水利水电出版社,2012. ZHU Bofang. Thermal Stresses and Temperature Control of Mass Concrete [M]. Beijing: China Water Power Press, 2012.
[9]
LIN Peng, LI Qingbin, HU Hang. A flexible network structure for temperature monitoring of a super high arch dam [Z/OL]. (2013-04-30), http://www.hindawi.com/journals/ijdsn/2012/917849/.
[10]
李庆斌, 林鹏. 论智能大坝[J]. 水力发电学报, 2014, 33(1), 139-146 LI Qingbin, LIN Peng. Demonstration on intelligent dam[J]. Journal of Hydroelectric Engineering, 2014, 33(1), 139-146.
[11]
林鹏, 李庆斌, 周绍武, 等. 大体积混凝土通水冷却智能温度控制方法与系统[J]. 水利学报,2013, 44(8), 950-957 LIN Peng, LI Qingbin, ZHOU Shaowu, et al.Intellectual control method and system of mass concrete temperature with cooling pipes[J]. Journal of Hydraulic Engineering, 2013, 44(8), 950-957
[12]
DL/T5436-2006. 混凝土拱坝设计规范[S]. 北京:中华人民共和国国家发展和改革委员会,2007. DL/T5436-2006. Design Criteria for Concrete Arch Dam[S]. Beijing: The National Development and Reform Commission of the People's Republic of China, 2007.
[13]
SL282-2003. 混凝土拱坝设计规范[S]. 北京:中华人民共和国水利部,2003. SL282-2003. Design Criteria for Concrete Arch Dam[S]. Beijing: The Ministry of Water Resources of the People's Republic of China, 2003.
[14]
LIN Peng, LIU Hongyuan, LI Qingbin, et al. Effects of outlets on cracking risk and integral stability of super high arch dams [Z/OL]. (2013-04-30), http://www.hindawi.com/journals/tswj/2014/312827/.
[15]
LIN Peng, MA Tianhui, LIANG Zhengzhao, et al. Failure and overall stability analysis on high arch dam based on DFPA code [Z/OL]. (2013-04-30), http://www.sciencedirect.com/science/article/pii/S1350630714002040.
[16]
钱宁, 薛振江. 李家峡水电站主坝混凝土裂缝及缺陷处理[J]. 西北水电, 2000 (04): 29-31. QIAN Ning, XUE Zhenjiang. Crack and deficit treatment of dam concrete for Lijiaxia Hydropower Station[J]. Northwest Hydropower, 2000 (04): 29-31.
[17]
LIN Peng, LIU Xiaoli, CHEN Hongxin, et al. Ant colony optimization analysis on overall stability of high arch dam basis of field monitoring [Z/OL]. (2013-04-30), http://www.hindawi.com/journals/tswj/2014/483243/.
[18]
王仁坤, 林鹏, 周维垣. 复杂地基上高拱坝开裂与稳定研究[J]. 岩石力学与工程学报, 2007, 26(10): 1951-1958. WANG Renkun, LIN Peng, ZHOU Weiyuan. Cracking and stability problems of high arch dams on complicated rock foundations[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(10): 1951-1958.