邱学峰1,李洪涛1,涂思豪1,姚强1,梁涛2.大直径深竖井弯段混凝土衬砌施工技术[J].水电能源科学,2019,37(1):102-105
大直径深竖井弯段混凝土衬砌施工技术
Construction Technology of Bend Section of Large Diameter and Deep Shaft Concrete Lining
  
DOI:
中文关键词:  清远抽水蓄能电站  大直径  深竖井  滑模  施工承重平台
英文关键词:Qingyuan pumped storage power station  large diameter  deep shaft well  slipform  construction load-bearing platform
基金项目:国家重点研发计划(2018YFC0406800);国家自然科学基金项目(51809188)
作者单位
邱学峰1,李洪涛1,涂思豪1,姚强1,梁涛2 1. 四川大学 水利水电学院, 四川 成都 610065 2. 中国水利水电第五工程局有限公司, 四川 成都 610066 
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中文摘要:
      清远抽水蓄能电站大直径深井下弯段混凝土衬砌施工中,若全段采用定型模板施工,脚手架搭设高度将超过规范规定值50 m,存在高空作业安全风险,同时资源投入大,浇筑工期为20 d,无法满足施工进度要求;竖井上弯段施工中,上库下闸蓄水使得施工通道受阻,材料运输困难,安全风险高,施工难度大,工期长,成本高。对此,在下弯段上部采用滑模爬升控制技术,施工工期由20 d缩短为3 d,并克服了高空作业风险,减少了资源投入;在竖井上弯段施工中,在竖井内搭设施工承重平台,同时预留天窗作为材料运输通道,解决了施工通道难题,同时保证了衬砌质量和施工进度,节约了成本。研究成果取得了较大的经济社会效益,可在类似工程施工中推广应用。
英文摘要:
      In the construction of concrete lining in the lower bend section of large diameter and deep well of Qingyuan pumped storage power station, if the fixed shape formwork is used in the whole section, scaffolding erection height will exceed 50 m, which has exceeded the allowable value of the specification and there are safety risks in working at high altitude. At the same time, the resource investment is large, and the construction period of concrete pouring is 20 days, which cannot meet the construction schedule requirements. In the construction of the upper bend section of the well, due to the storage of water at the upper reservoir, the impoundment of the upper and lower sluice, the construction channel is blocked. The material transportation and construction is difficult. The safety risk and cost is high, and the construction period is long. Therefore, the sliding formwork climbing technology is adopted in the upper part of the lower bend section, and the construction period is shortened from 20 d to 3 d, which overcomes the risk of high-altitude operation and reduces the investment of resources. In the construction of the upper bend section of the well, the load-bearing platform is built in the well, and the skylight is reserved as the transportation channel of materials, which solves the problem of the construction channel, ensures the lining quality and construction progress, and saves the cost. The research results have gained great economic and social benefits and can be applied in similar engineering construction.
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