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عنوان فارسی مقاله:
پیشرفت فنی در تحقیق و پژوهش برای ایمنی بتن روبه روی سنگریزه سد
عنوان انگلیسی مقاله:
Technical Progress on Researches for the Safety of High Concrete-Faced Rockfill Dams
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Western China has abundant hydropower resources and great potential for hydropower development. However, these resources are difficult to exploit due to the high altitude, harsh natural environment, complex topographical and geological conditions, inconvenient transportation routes, and high seismic intensity of potential dam sites. Under these circumstances, dams constructed with local materials have better adaptability. In particular, the concrete-faced rockfill dam (CFRD) is one of the most promising dam types for this region, since it can make full use of local materials to reduce the transportation of construction materials out to the dam site, and has high adaptability, distinct economic advantages, and an excellent capability for earthquake resistance. A number of ultra-high dams that are 250–300 m in height, including the Gushui (dam height 240 m), Rumei (dam height 315 m), Maji (dam height 277.5 m), and Cihaxia (dam height 257.5 m) dams, are planned for construction in Western China. If the situation permits, the CFRD will be the preferred dam type. At present, there are more than 600 CFRDs around the world, including constructed, under-construction, and proposed dams. China possesses the largest number of CFRDs. According to the Technical Committee on CFRDs of the China Society for Hydropower Engineering [1–3], at the end of 2013, there were 325 CFRDs with heights greater than 30 m in China and 16 CFRDs with heights greater than 200 m around the world—10 of which were in China. The Shuibuya Dam in China, which is 233 m high and was completed in 2008, is currently the world’s highest CFRD. Since the 1980s, China’s CFRD construction technologies have made significant progress through the introduction, digestion, absorption, and re-innovation of advanced technologies, as well as through the construction of many CFRDs, including Tianshengqiao-1 (dam height 178 m, built in 2000), Hongjiadu (dam height 179.5 m, built in 2005), Sanbanxi (dam height 185.5 m, built in 2006), and Shuibuya (dam height 233 m, built in 2008). These efforts have provided the necessary technical reserves for the development of 250–300 m ultra-high CFRDs. This paper summarizes China’s successful experiences and analyzes the problems of a number of major 200 m CFRDs around the world. In addition, it systematically discusses the key tech-nologies and latest research progress regarding safety for the construction of 250–300 m ultra-high CFRDs, and suggests focuses and general ideas for future research.
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کلمات کلیدی:
Radiation Safety Problems in the Caspian Region: Proceedings of the ... https://books.google.com/books?isbn=1402023782 Mohammed K. Zaidi, Islam Mustafaev - 2006 - Science The professional staff being forced to work at the high and wide frequency spectrum ... and biological research, its urgency in current stage of technical progress, ... Study: Technological progress alone won't stem resource use | MIT ... news.mit.edu/2017/technological-progress-alone-stem-consumption-materials-0119 Jan 19, 2017 - An MIT study finds technological progress isn't enough to reduce ... is relatively low and the rate of its technological improvement is high. Missing: safety Applied Science and Technological Progress: A Report to the ... https://books.google.com/books?id=BTcrAAAAYAAJ National Academy of Sciences (U.S.). Committee on Science and Public Policy, National Research Council (U.S.). Panel on Applied Science and Technological Progress - 1967 - Research, Industrial Committee on Science and Public Policy, National Research Council (U.S.). ... safety campaigns were launched, and yet the traffic death toll remained high. The Importance of Animal Experimentation for Safety and Biomedical ... https://books.google.com/books?isbn=9400919042 S. Garattini, D.W. van Bekkum - 2012 - Medical Industrial and technical progress has increased their quantity. ... Consumers themselves are calling for higher levels of safety for drugs, food ... The Importance of Animal Experimentation for Safety and Biomedical Research, 185–190. © 1990 ... Progress Reports - MIT web.mit.edu/course/21/21.guide/progress.htm Cover Page of The Mayfield Handbook of Technical & Scientific Writing ... Internal research workers use progress reports to report on their work to managers ... conditions were given additional attention because of their potential safety hazards. ... pipe-to-pipe impact following any break in high-energy fluid system piping.
