施工支洞改建为检修支洞的结构设计与分析
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摘要
通过对厄瓜多尔CCS输水隧洞施工支洞改建检修支洞进行研究,提出一种新型改建方法,该方法避免了传统增设检修闸门的方式,降低了施工难度和工程投资,且缩短了工期,改建方案既可以在运行期挡水,又可以在检修期放空输水隧洞主洞的情况下对主洞进行检修,检修支洞还可兼作明流输水隧洞的通气洞。通过有限元结构计算分析研究,探索了检修通道结构设计方法,最终形成了完整的施工支洞改建检修支洞的方案,该检修支洞改建方案尤其适用于长距离、大直径、深埋输水隧洞的施工支洞回填改建检修支洞。
This paper proposed a new reconstruction method for the reconstruction of the support of the CCS water tunnel in Ecuador. This method avoided the traditional method of adding maintenance gates, reduced the construction difficulty and engineering investment and shortened the schedule. During the maintenance support tunnel could not only retain water during the operation period, but also repair the main tunnel of water conveyance tunnel under the condition that the main tunnel of the water conveyance tunnel was emptied during the maintenance period, and could also serve as a ventilation tunnel for the open water tunnel. The finite unstructured calculation was used for analysis and research, and a set of maintenance channel structure design method was explored, which finally formed a complete set of new methods for reconstruction and repair of the support tunnel.
This paper proposed a new reconstruction method for the reconstruction of the support of the CCS water tunnel in Ecuador. This method avoided the traditional method of adding maintenance gates, reduced the construction difficulty and engineering investment and shortened the schedule. During the maintenance support tunnel could not only retain water during the operation period, but also repair the main tunnel of water conveyance tunnel under the condition that the main tunnel of the water conveyance tunnel was emptied during the maintenance period, and could also serve as a ventilation tunnel for the open water tunnel. The finite unstructured calculation was used for analysis and research, and a set of maintenance channel structure design method was explored, which finally formed a complete set of new methods for reconstruction and repair of the support tunnel.
引文
[1] 金长文.厄瓜多尔CCS水电站输水隧洞施工简介[J].云南水力发电,2014,30(5):8-10.
[2] 林长杰.浅谈永久检修支洞的选取布置[J].水利水电技术,2012,43(7):53-54.
[3] US Army Corps of Engineers.Tunnels and Shafts in Rock:EM1110-2-2901[S].Washington:Department of the Army,1997:1.
[4] 钮新强,汪基伟,吴德绪,等.水工混凝土结构设计规范:SL 191—2008[S].北京:中国水利水电出版社,2008:164-165.
[2] 林长杰.浅谈永久检修支洞的选取布置[J].水利水电技术,2012,43(7):53-54.
[3] US Army Corps of Engineers.Tunnels and Shafts in Rock:EM1110-2-2901[S].Washington:Department of the Army,1997:1.
[4] 钮新强,汪基伟,吴德绪,等.水工混凝土结构设计规范:SL 191—2008[S].北京:中国水利水电出版社,2008:164-165.