在线国产一区二区_成人黄色片在线观看_国产成人免费_日韩精品免费在线视频_亚洲精品美女久久_欧美一级免费在线观看

USEUROPEAFRICAASIA 中文雙語Fran?ais
Business
Home / Business / Companies

Three Gorges super ship lift boosts efficiency, safety

By YANG ZIMAN and HU YUANYUAN in Hubei | China Daily | Updated: 2016-11-24 08:20

The massive new ship lift being used at the Three Gorges Dam on the Yangtze River, the biggest and highest one in the world, has greatly boosted efficiency and safety for ships going through the dam, said the head of its operations.

The ship lift, which began functioning in September, can elevate vessels up to 3,000 metric tons up or down a vertical distance of 113 meters. The ship chamber itself has a pool of water 120 meters long by 18 meters wide and 3.5 meters deep. The lift was built to accommodate mostly small and medium-sized vessels, with bigger ships still using the dam's adjacent five-tiered lock system to navigate the waterway.

"It only takes about 40 minutes for a ship to go through the dam compared with around three hours in the past," said Wu Xiaoyun, director of the ship lifter program and chief of the electromechanical engineering bureau of China Three Gorges Corp.

Before the completion of the ship lift, all the ships had to use the five levels of ship locks.

"Ship locks were like stairs. Walking up or down stairs is certainly much slower than taking the lift," Wu said.

The ship lift is the biggest in the world with maximum lifting weight of 15,500 tons and maximum height of 113 meters.

The new ship lift entered the second phase of its trials when it began operating 24 hours a day in November, following its successful first tests in September.

"Apart from faster speed, the ship lift is also safer. It's very dangerous if the ship catches fire in ship locks. But on the lift, with its open space, the chance for such a situation developing is much smaller," said Wu.

He said one of the biggest challenges in building the ship lift was a potential swelling of the cement towers under the heat of the sun, which could tilt the lift.

In order to indicate that a strict balance for a ship was achieved as it was lifted, a coin was placed standing upright on the railing of the vessel during the test run. The coin remained upright throughout the process.

Wu said the balance of a ship could also be effected if the unit's wheels for lifting the ship were to crack. To establish beyond doubt that the wheels are solid, they are subjected to exhaustive testing which concluded that they are good for at least 70 years.

The ship lift was completely made by China-the design, the equipment manufacturing, the installation and construction, said Wu.

Contact the writers at yangziman@chinadaily.com.cn and huyuanyuan@chinadaily.com.cn

Most Viewed in 24 Hours
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 久久久天堂国产精品女人 | 中国黄色录像 | 日韩a在线观看 | 国产成人高清 | 一级片免费 | 国产99在线 | 六月天婷婷| 亚洲国产精 | 欧美日韩国产在线播放 | 亚洲免费在线观看 | 国产免费网址 | 在线免费观看黄色片 | 精品国产区一区二 | 日韩在线不卡视频 | 天天射av | 欧美日韩成人 | 中文字幕在线观看一区二区三区 | 成人在线a | 国产综合在线视频 | 不卡av在线| 中文字幕在线观看日本 | 福利视频免费观看 | 国产在线高清 | 成人b站 | 性欧美8khd高清极品 | 亚洲视频在线播放 | 黄频在线观看 | 午夜免费看片 | 五月婷婷六月激情 | 国产福利av | 中文字幕伊人 | 日本少妇中文字幕 | 一级片观看 | 欧美一级在线视频 | 91麻豆精品国产91久久久久久 | 精品一区二区视频 | 国产精品久久久久久久久 | 日本成人精品 | 国产综合亚洲精品一区二 | 激情五月婷婷综合 | 久久cao |