锦屏二级水电站深埋特大引水隧洞关键技术

Seven tunnels across Jinping Mountain are arranged for Jinping Ⅱ Hydropower Station, with a total length of about 120 km. Among them, four headrace tunnels have a length of 16.67 km, an excavated diameter of 12.4-14.6 m, and a cover depth of 1 500-2 000 m in general. The maximum cover depth is 2 525 m, and the maximum external water pressure is more than 10 MPa. The tunnels are featured by great length, great depth and large diameter. It is the largest and most difficult among the underground tunnel groups built or under construction in China and even the world. With complex hydrogeological conditions and special topographical conditions along the tunnels, many challenging problems, such as rock burst under high in situ stresses, groundwater inrush in karst strata and failure of loading bearing structure, were encountered during construction. A great amount of groundbreaking studies were carried out regarding these problems. The key technical problems during construction of extremely large and deep tunnels were solved successfully. Safe and rapid tunnel construction and stable operation were achieved. The hydropower station started operation in 2014 and has been in a safe and stable operation state. The successful construction of headrace tunnels of Jinping Ⅱ Hydropower Station can provide some experiences and reference for deep tunnel projects in the world.     

上海局一级道碴产供布局调整目标与实施对策

以“八五”期间道床铺设一级，二级道碴的统计资料为依据，推测“九五”期间一级道碴的需求量，论证一级道碴的资源和生产能力配置，提出产供布局的调整目标与实施对策。     

水电站调速装置的技术改造

早前,水电站调速装置大部分运用的是机械液压调速器,随着科学技术是高速发展,机械液压调速器已经满足不了水电站自控水准,因此水电站调速装置的技术改造势在必行.阐述了水电站调速装置现状,分析了其存在的普遍问题,基于YWT型可编程调速器技术,提出了水电站调速装置的技术改造措施.     

大庆市公路网现状的分析与评价指标的采用

大庆市在改革开放以来，公路建设有了较快发展，高等级公路、一级公路从无到有，等外公路逐年减少，公路技术等级普遍有所提高，路面铺装得到改善，路网通达深度相对较高，公路通乡镇率达到100％，通行政村率达到99．6％。     

英美F1风潮登陆上海带来“无限空间 无尽体验”

6月的上海注定成为中国F1的焦点；上海国际赛车场的开幕庆典刚刚落下帷幕。国际F1车坛的新秀——英美车队（B.A.R.Hanoa)便在沪举行了首次中国媒体见面会。     

呼武一级公路开工奠基

12月10日，自治区党委常委、呼和浩特市委书记韩志然（上图右7），自治区副主席赵双连（上图右6），自治区交通厅厅长常海（上图左7）、驻厅纪检组长额尔敦仓、副厅长周杰等各级领导挥锹为省道104线呼武一级公路开工奠基。     

水口水电站三级船闸下游导航墙设计

福建水口水电站三级船闸，设计水头５７．３６ｍ，现已投入运行。本文主要介绍三级船闸下游导航墙设计中的冲击钻造孔成墙方案及隔流墩结构的设计标准，计算工况和防护措施等。     

天生桥一级水电站趾板基础帷幕灌浆施工

介绍天生桥一级水电站趾板基础帷幕灌浆施工的方法 ,所用浆液浓度及灌浆压力 ,施工中应注意的问题及特殊情况的处理。