Grouting Temperature and Thermal Load of RCC Arch Dam
Based on the analysis of arch sealing temperature and temperature load of RCC arch dam, taken perennial average temperature of the dam and the practical temperature during impounding which is calculated from simulating analysis as the starting point of calculation for four RCC arch dams with different heights, dam stresses in different heights are calculated by finite element equivalent stress method. The arch sealing temperature and temperature load of the RCC dam in different heights are discussed according to the calculating results. The following conclusions are obtained: (1) The difference between temperature load calculated by taken perennial average temperature as the arch sealing temperature and temperature load calculated by simulating method will increase with the increase of dam height. For arch dams which are more than 100m high, simulating analysis method should be used to study the temperature load to determine the real arch sealing temperature; (2) If second phase water cooling and arch sealig and grouting are not carried out, adequate argumentation should be conducted. Generally, large tensile stress will appear on the dam heel, which will induce cracking of the dam heel; (3) Water cooling pipe and jointing mode should be adopted to RCC high arch dam. To reduce the temperature load in operation, use second phase water cooling to lower the dam temperature to designed arch sealing temperature before impounding, and then conduct arch sealing and grouting.
roller compacted concrete arch sealing temperature temperature load simulating analysis equivalent stress
Zhang Guoxin Zhang Jinghua Yang Bo
China Institute of Water Resources and Hydropower Research, Beijing 100044, China
国际会议
第五届碾压混凝土坝国际研讨会(The Fifth International Symposium on Roller Compacted Concrete(RCC))
贵阳
英文
95-103
2007-11-02（万方平台首次上网日期，不代表论文的发表时间）