Research And Application Of RCC Dam Fast And Economic Construction Of Guandi Hydropower Station

Guandi hydropower station is the third cascade hydropower station in Cara to the estuary of Yalong River, to start the preparatory work at the end of 2014. In the second half of 2009, Yalong River Hydropower Development CO.,LTD..put forward the tentative plan that the first unit of generation production of Guandi Hydropower Station produce electric energy in 2012 March. Power plant construction, therefore, need comprehensive processing, especially in the dam foundation excavation progress has been lagging behind plan under the condition of nine months, the excavation phase must be reduced, and the time of roller compacted concrete pouring dam construction must be compressed to 23 months from 33 months.Guandi hydropower station RCC dam height is 168 m. with the domestic recent built into the same type of dam, such as longtan, Jin Anqiao, illumination, etc. Have a lot in common, can draw lessons from successful experiences. In this paper, from the optimization of the mix proportioning of the roller compacted concrete, optimization of RCC construction method and process, lower the temperature in the RCC transport, warehousing, adopt a variety of economic and feasible ways is cooled to reduce the highest RCC dam temperature and strengthen construction management, do a good job in warehouse planes a dragon of water production, carry out research work, in order to achieve the dam RCC for continuous casting. And the strong constraint section RCC lift up to 6 m, reduce the level of processing and interlayer intermittent time, sharp compression roller compacted concrete dam construction time, speed up the rise of RCC dam, RCC mix proportion tests at the scene of the Guandi at the same time, such as the field test of rolling test work, and carry on the simulation, temperature control, monitoring and other special research, guidance Guandi hydropower station RCC dam construction fast, satisfies the requirement of dam retaining water in advance.By calculation, Guandi hydropower generating income of 283 million yuan for 3 months in advance, for power generation in advance directly to the related cost for the increased investment of 43.3728 million yuan, generating revenue in advance significantly greater than the investment cost, quick Guandi hydropower station RCC dam construction obtained considerable economic benefits.Through the Guandi hydropower station dam RCC rapid economic construction practice, can prove that, under the premise that do a good job of temperature control, can realize more rapid construction of RCC, at the same time also can obtain better economic benefit. Guandi hydropower station dam crack in ensuring security under the premise of successful implementation of the rapid construction of roller compacted concrete, further to reconcile the dam safety and economy of this pair of contradictions, significantly improved the RCC dam construction and operation of cost performance, to promote construction of roller compacted concrete dam play a good role in promoting.