日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Society

Hufengling Tunnel connects, construction continues

By TIAN XUEFEI and ZHOU HUIYING in Harbin | chinadaily.com.cn | Updated: 2017-08-21 18:09

Hufengling Tunnel connects, construction continues

Workers celebrate the rocks on the final section were broken through in Hufengling Tunnel on Aug 20, 2017. [Photo provided to chinadaily.com.cn]

After a loud explosion within the Hufengling Tunnel, 200 kilometers from Harbin, capital of Heilongjiang province, the rocks on the final section were broken through on Sunday.

The tunnel-8,755 meters-on the Harbin-Mudanjiang high-speed rail line is the longest tunnel in regions with temperatures as low as -40C.

During its construction, builders faced a range of difficulties, including the region's extremely low temperatures.

"In order not to delay the project, we are committed to it without interruption even on the coldest days," Wang Zhiqiang, the vice chief engineer of the tunnel project said.

"However, the most serious problem we met was that the concrete construction can't be operated under -5C."

"We built two 4,000-square-meter greenhouses and installed boilers within them to keep the temperature around 10C," Wang told China Daily in an interview.

"The boilers could also provide us warm water to mix the concrete in the greenhouses."

It was about four kilometers away from the greenhouse to the farthest entrance of the tunnel, Wang added.

"We wrapped the tanks with thick quilts during the transportation of the concrete in the cement tankers," he said.

"All the efforts could maintain the temperature."

Wang said he expected the construction of the tunnel to be finished by the middle of October.

The Harbin-Mudanjiang high-speed rail line, designed for trains running at speeds of up to 250 km per hour between Harbin and Mudanjiang, will cut the travel time to about an hour 30 minutes, down from five hours.

Construction of the 300-km line, a high-speed rail line, began in December 2014, and is expected to be put into service by the end of 2018, railway authorities in Harbin said.

Previous 1 2 Next

Editor's picks
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: 欧美一级片网址 | 成年人在线观看网站 | 日韩在线视屏 | 九九热精品视频在线观看 | 欧美视频一二三 | 成人在线一区二区 | 国产又爽又黄网站 | 国产成人精品123区免费视频 | av网站在线免费观看 | 午夜一区二区三区 | 50度灰在线观看 | 亚洲图片日韩 | 最近中文字幕在线中文高清版 | 91精品福利 | 中文字幕亚洲欧美日韩 | 特黄特色大片免费播放器使用方法 | 久久久欧美精品sm网站 | 成人公开免费视频 | 麻豆一二三区 | 91免费精品| 亚洲欧洲免费 | 日产精品一区二区 | 黄色小视频免费观看 | 精品久久国产视频 | 精品毛片在线观看 | av资源首页 | 中文字幕av一区二区三区谷原希美 | 性网站在线观看 | 国产精品成人免费精品自在线观看 | 日韩免费专区 | 婷婷色网站 | 欧洲av一区 | 黄色一级视频免费 | 亚洲天天干 | 美女av网站 | 99视频免费 | 日韩成人区 | 日本一区免费观看 | 成人亚洲综合 | 69av在线播放 | 狠狠躁夜夜躁人人爽天天高潮 |