杨房沟水电站高拱坝大体积混凝土温控措施研究

Temperature Control Measures of Mass Concrete in High Arch Dam in Yangfanggou HEP

高拱坝大体积混凝土施工过程中的温度控制为其重中之重。为解决大体积混凝土在其硬化过程中水泥水化热在块体内产生的温度变化带来的应变和应力、继而引发的温度裂缝问题,需要采取强有力的施工措施控制混凝土的温度变化。阐述了杨房沟水电站从混凝土原材料、出机口温度、混凝土入仓、浇筑、养护及通水冷却等环节进行的全过程有效控制,使混凝土温控相关的各项指标满足设计要求,控制水平优秀,所取得的经验对同类工程具有推广和借鉴意义。

Temperature control of mass concrete during construction is a top priority in high arch dam.In order to meet the challenge of strain and stress caused by the temperature change of cement hydration heat in the mass concrete during its hardening process and the temperature crack caused by it,it is necessary to take strong construction measures to control the temperature change of concrete.This paper elaborates the effective control of the whole process in Yangfanggou hydropower project,from concrete raw materials,outlet temperature,concrete placing,pouring,curing to water cooling,so as to make the relevant indicators of concrete temperature control meet the design requirements,and the control level is excellent.The experience obtained has the significance of promotion and reference for similar projects.