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大坝碾压混凝土在大体积混凝土施工中经常使用。大体积混凝土在施工过程中水化热较高，因此温度控制成为了大体积混凝土施工中必须考虑的重要因素之一，若温度控制不当，混凝土极易产生温度裂缝。以金寨县中河水库8~#—11~#溢流坝与非溢流坝段为研究背景，通过现场实际情况与理论相结合的研究方法，采取相关措施来解决大坝主体施工过程中遇到的坝体内部温度过高、外界气温影响较大等技术难点问题。通过增设冷水机组、铺设冷却水管、增加仓面喷雾设备等方式对仓面及坝体内部混凝土进行降温处理；同时针对裂缝产生的原因，采取凿槽、灌浆、铺设闭缝钢筋等措施。实践证明，采取的降温措施能良好地解决大体积混凝土施工中坝体内部温度过高的影响，其降温效果显著。此研究可为类似的工程提供技术参考。
Abstract：RCC is often used in the construction of mass concrete. The hydration heat of mass concrete is high, so temperature control becomes one of the important factors that must be considered in the construction of mass concrete. Taking 8~#～11~# spillway dam and non-spillway dam section of Zhonghe Reservoir in Jinzhai County as the research background, the technical difficulties of high temperature inside the dam body and great influence of external temperature during the construction of the main dam body were solved by combining the actual situation and theory. Cooling treatment was carried out on the storehouse surface and inside the dam body by adding chillers, laying cooling water pipes and increasing spray equipment on the storehouse surface. The practice proves that the cooling measures adopted can solve the influence of high temperature inside the dam body in the construction of mass concrete well, and the cooling effect is remarkable. This research can provide technical reference for similar projects.
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基本信息:
DOI：10.13928/j.cnki.wrahe.2022.S2.031
中图分类号:TV698.231
引用信息:
[1]李兴朝,何起,曹虎.大坝碾压混凝土温控技术及裂缝处理措施[J].水利水电技术(中英文),2022,53(S2):135-139.DOI:10.13928/j.cnki.wrahe.2022.S2.031.
2022-09-20
2022-09-20