STUDY ON THE QUALITY CONTROL TECHNOLOGY FOR LAYER BOUNDARIES OF RCC OF NANSHA HYDROPOWER STATION

摘要

Nansha power station is located in a typical sub-tropical climatic region with high temperature and low humidity, where high-temperature time of the year is up to 70%. The RCC is very difficult to be placed in such climatic conditions. In this paper, the effects of environmental conditions and admixture on RCC set-time and the effects of different treatment processes on the quality of layer boundaries are studied. Field observation of dam shows that the quality of layer boundaries can be ensured by the comprehensive use of construction technical measures such as optimizing concrete mix ratio, damp preservation and cooling by spraying, sun protection, rapid construction and the control of interval time between placing of different layers.