日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Society

Guangdong to inspect bridges, freeways

By ZHENG CAIXIONG in Guangzhou | CHINA DAILY | Updated: 2020-05-08 08:46
Share
Share - WeChat
Humen Bridge in Dongguan, Guangdong province, is closed to traffic on May 5, 2020, after vibrations occurred in the bridge deck. [Photo provided to China Daily]

Guangdong province will conduct thorough surveys on all its bridges and expressways, especially on major bridges crossing seawater, rivers and canyons, and at major traffic junctions long in use, top provincial officials said.

The move, announced on Wednesday afternoon, follows vibrations this week that have shut down traffic on Humen Bridge, a 4.6-kilometer span that links the eastern and western parts of the economically important Pearl River Delta.

Li Xi, Party secretary of Guangdong, pushed for the surveys to eliminate potential risks and for departments involved to fully respect experts' advice and allow Humen Bridge traffic to resume when safety is ensured. On Wednesday, Li visited the command center to evaluate the bridge, which was completed in June 1997.

The bridge was closed after an unusual vibration was first reported at about 2:30 pm on Tuesday. More vibrations followed that night.

The Guangdong Provincial Transportation Department quickly closed the bridge-which handles more than 170,000 vehicles a day during peak periods-and organized a 12-person team of experts to investigate.

On Thursday, experts said the bridge remains safe in the wake of the vibrations.

The main structure of the bridge was not damaged, and the bridge fundamentally returned to its normal state when the vibrations stopped on Thursday, said Chen Airong, a member of the expert team, who is an engineering professor specializing in bridges at Shanghai-based Tongji University.

When Humen Bridge will again be open to traffic was still being discussed by bridge experts, said Zhang Xinmin, deputy chief engineer of the maintenance department of the bridge.

The water channels under Humen Bridge reopened to ships and boats after 4:30 pm on Thursday, according to the Guangzhou maritime department. Following the appearance of the vibrations, no vessels had been allowed to operate or be moored near the bridge as a precautionary measure.

There is little chance that the unusual vibrations will occur again in the near future, Chen told reporters. "The bridge will have no problems when traffic resumes," he said.

Zhang said it appears the vibrations were mainly caused by barricades that had been placed on the bridge's surface by maintenance workers during repairs.

It is normal for the bridge to shake under special wind conditions and the vibrations have little effect on the structural safety and durability of the span, he said.

Barricades removed

"The vibrations began to stop after the 1-meter-high barricades were moved away, given that the barricades may have changed the aerodynamic shape of the steel box girder, and that might have caused vibrations," Zhang said. A box girder is a type of structural beam.

But the vibrations have little impact on the bridge's safety, he said.

"Designers fully considered the wind resistance coefficient before construction of the bridge began," said Zhang.

Humen Bridge links the city clusters of Shenzhen, Dongguan and Huizhou in the eastern part of the Pearl River Delta with Guangzhou's Nansha district and the cities of Zhuhai, Zhongshan, Foshan, Jiangmen and Zhaoqing in the west.

The bridge plays a major role in the infrastructure connectivity of the Guangdong-Hong-Kong-Macao Greater Bay Area, which includes nine Guangdong cities and the Hong Kong and Macao special administrative regions.


 

 

Top
BACK TO THE TOP
English
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: 国产福利福利视频 | 丁香婷婷久久久综合精品国产 | 午夜精品久久久久久 | 九九视频只有精品 | 91精品国产综合久久久久蜜臀 | 久久亚洲国产高清 | 精品视频一区二区三区在线播放 | 欧美1区 | 91免费视频| 久久97久久97精品免视看 | 精品一卡2卡三卡4卡乱码免费 | 日本黄色激情 | 国产成人区 | 国产精欧美一区二区三区 | 国产vr一区二区在线观看 | 亚洲色综合图区p | 国产精品久久久久久日本一道 | 手机看片高清日韩精品 | 国产欧美日韩综合精品一区二区 | 国产精品高潮呻吟久久aⅴ码 | 欧美一级毛片一 | 色噜噜狠狠色综合日日 | 精品久久久久久久久久 | 亚洲五月综合网色九月色 | 日本高清18xxxx| 在线天堂中文在线资源网 | 黄色资源在线观看 | 一级毛片国产真人永久在线 | 亚洲精品久久久久久久久久吃药 | 嘿咻免费视频欧美激情 | 欧美日韩一区二区中文字幕 | 蜜臀在线视频 | 久久中文在线 | 国产精品久久久一区二区三区 | 一区二区三区免费视频 www | 欧美日韩久久久 | 亚洲精品福利你懂 | 国产午夜精品一区二区三区 | 国产小视频福利 | 亚洲精品1区| 色综合久久天天综合网 |