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“筷子”堆里雕出“艺术品”

2017-08-23 08:24:46   中国青年网

1号尾水边顶拱钢筋绑扎。

这一天,“是一个对世界水电发展史有重要影响的日子”。

8月3日,经过全体建设者6年的精心筹备和日夜奋战,装机规模仅次于三峡工程、在建规模世界第一的白鹤滩水电站主体工程全面开工,金沙江将再添一座千万千瓦级巨型水电站。

由水电十四局承担施工的左右两岸8座尾水调压井,以其规模宏大、工艺精湛引发业内专家和同仁的首肯——8个圆筒式尾水调压室直径43米~48米,为世界已建跨度最大调压室;圆筒式尾水调压井规模世界第一;地形地质条件复杂程度、施工技术难度在水电建设史上首屈一指……三峡集团董事长卢纯点赞说:“上百米深的巨大工程,半孔率达90%多,超挖欠挖控制在10厘米之内,不得了!无论半孔率、超挖欠挖率,还是开挖出来的整体水平,都是雕塑品、艺术品。”

交出靓丽“成绩单”

水电十四局白鹤滩项目部承担两个标段施工,即左右两岸的引水发电系统土建(尾水部分)工程,另有施工支洞、交通洞、尾水连接管等。

8座尾水调压室,左岸、右岸各4座。开挖直径从43米~48米不等,堪比两个篮球场的长度;室内竖井直墙开挖高度分别为57.92米~93米。竖井加上室内顶拱,深的已超过百米,相当于33层楼房的高度。

水电十四局克服技术难题空前、建设环境复杂、生活条件艰苦等诸多困难,圆满完成主体工程全面开工建设的各项前期工作,交出的“成绩单”令人瞩目:尾调室开挖平整度小于8厘米,超挖欠挖小于10厘米,质量优良率达94%;左岸尾水系统工程共完成单元评定2322个,合格率100%、优良率95.9%;右岸共完成单元评定2222个,合格率100%、优良率93.8%;积极组织开展技术创新活动,完成公司级工法、集团公司工法各2项,电力建设工法1项;申报发明专利2项、实用新型专利2项,获得实用新型专利授权2项;参与完成三峡集团科研项目2项,其中“金沙江下游水电站巨型机组地下厂房洞室群建设关键技术”获第七届中国岩石力学与工程学会科学技术进步二等奖。

“筷子”堆里掏洞室

水电专家表示:“白鹤滩工程建设难度位居世界前列。”永久安全监测数据显示:尾调穹顶的围岩最大变形数值小于设计控制指标,创造了白鹤滩地下洞室群主体工程施工的亮点。

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