官地水电站碾压混凝土大坝快速经济施工研究与应用

发布时间：2018-05-01 02:36

本文选题：官地水电站 + 碾压混凝土　；参考：《清华大学》2014年硕士论文

【摘要】：官地水电站是雅砻江卡拉至江口河段的第三个梯级电站,于2004年底开展前期准备工作。2009年下半年,电站业主雅砻江流域水电开发有限公司提出了首台机组于2012年3月提前发电投产的设想。因此,电站建设需要全面赶工,特别是在当时大坝坝基开挖进度已经滞后计划9个月的情况下,开挖阶段必须赶工,且大坝碾压混凝土的浇筑施工时间必须从33个月压缩至23个月。官地水电站碾压混凝土重力坝坝高168m,与国内近期建成的同类型坝如龙滩、金安桥、光照等有许多相同之处,可借鉴相关成功经验。本文通过从优化碾压混凝土配合比、优化碾压混凝土施工方案及工艺、降低碾压混凝土入仓温度、采取多种经济可行的方式入仓、采取通水冷却降低碾压混凝土大坝最高温度、加强施工管理搞好仓面一条龙的流水生产等方面开展研究工作,以期实现大坝碾压混凝土全年持续浇筑。并将非强约束区碾压混凝土升程提高至6m,减少层面处理及层间间歇时间,大幅压缩碾压混凝土大坝施工时间,加快碾压混凝土大坝上升速度,同时在官地现场开展碾压混凝土配合比试验、碾压试验等各项现场试验工作,并进行仿真、温控、监控等专项研究,指导官地水电站碾压混凝土大坝的快速施工,满足大坝提前挡水要求。经测算,官地水电站提前3个月发电的收益为2.83亿元,因提前发电直接增加投入的相关的费用为4337.28万元,提前发电收益明显远大于投入的费用,官地水电站碾压混凝土大坝快速施工获得了可观的经济效益。通过官地水电站大坝碾压混凝土快速经济施工的实践,完全可以证明,在做好温控工作的前提下,碾压混凝土可以实现更快速的施工,同时也可获得更加良好的经济效益。官地水电站大坝在确保防裂安全的前提下成功实施了碾压混凝土的快速施工,进一步调和了大坝的安全性与经济性这一对矛盾,显著提高了碾压混凝土大坝施工和运行的性价比,将对推动碾压混凝土大坝的建设起到良好的促进作用。
[Abstract]:Guandi Hydropower Station is the third cascade power station from Kara to Estuary of the Yalong River. Preparatory work was carried out at the end of 2004. In the second half of 2009, Yalong River Basin Hydropower Development Co., Ltd., the owner of the power station, put forward the idea that the first unit should be put into production in March 2012. Therefore, the construction of the power station needs to be carried out in a comprehensive manner, especially since the excavation schedule of the dam foundation was already behind schedule for nine months at that time, the excavation stage must be rushed. The construction time of RCC must be reduced from 33 months to 23 months. The height of RCC gravity dam in Guandi Hydropower Station is 168m, which has many similarities with the similar dams such as Longtan, Jin'an Bridge and Illumination, which can be used for reference. In this paper, by optimizing RCC mix ratio, optimizing RCC construction scheme and technology, reducing RCC entering temperature, adopting many economical and feasible ways to enter warehouse, adopting water cooling to reduce the maximum temperature of RCC dam. Strengthen the construction management and carry out the research work in the aspects of running water production of the one-stop train of silo surface so as to realize the continuous pouring of RCC dam throughout the year. It also increases the lift of RCC to 6 m, reduces the interval between layers and layers, compresses the construction time of RCC dam, and accelerates the rising speed of RCC dam. At the same time, the RCC mix ratio test, roller compaction test and other field tests are carried out in the official field, and special research such as simulation, temperature control and monitoring are carried out to guide the rapid construction of the RCC dam in Guandi Hydropower Station. To meet the dam ahead of time water requirements. It has been estimated that the revenue of generating electricity in Guandi hydropower station three months ahead of schedule is 283 million yuan, and the related cost of direct increase in input for early generation is 43.3728 million yuan. The benefit of early generation is significantly larger than the cost of input. The rapid construction of Roller compacted concrete Dam in Guandi Hydropower Station has obtained considerable economic benefits. Through the practice of rapid and economical construction of RCC in Guandi Hydropower Station, it can be proved that RCC can realize faster construction and obtain better economic benefit under the premise of temperature control. The dam of Guandi Hydropower Station has successfully implemented the rapid construction of roller compacted concrete under the premise of ensuring crack prevention and safety, further reconciling the contradiction between safety and economy of the dam. The ratio of performance to price of RCC dam construction and operation is significantly improved, and it will play a good role in promoting the construction of RCC dam.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV544.921

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