碾压混凝土拱坝开裂研究的进展

近年来碾压混凝土拱坝快速发展，已经跃上了百米级高度的台阶。尽管高粉煤灰掺量使得碾压混凝土水化热较低，但由于采用通仓连续碾压的施工方式，使得碾压混凝土高拱坝的温度裂缝问题依然十分突出。从坝体分缝、拱坝开裂理论分析以及碾压混凝土材料、施工技术、理论计算等方面进行了探讨，分析了今后碾压混凝土拱坝裂缝控制的发展方向。

Study advance on the cracking of RCC arch dams

In recent years, the construction technique in arch dam engineering has been revolutionized due to the rapid development of RCC arch dams, and the target of dam height with 100m above is realized. In spite of the lower heat of hydration of RCC materials due to high ratio of fly ash, cracking problem is very serious due to the high tensile stress when the temperature of the dam reduces because the continuous full-face compacted construction technique is applied. In this paper, the progress of dam joint-cutting (structural model) is mostly introduced by engineering practice, then the advance and open questions on theoretical analysis of cracking of RCC arch dam is mentioned. Finally, from RCC materials, construction technology, as well as theoretical analysis, some trends in the development of cracking control of RCC arch dams are predicted.