Tongmai Special Bridge
The Tongmai Special Bridge (Chinese: 通麦特大桥, 通麦大桥) is a critical project on the Sichuan-Tibet Highway, specifically along the southern route of National Highway 318, across the Yiong Tsangpo.[1]
Three bridges spanning the river are situated in the same place, each from distinct historical periods. The primary thoroughfare is the Tongmai Special Bridge, a single-tower cable-stayed structure, while the original two bridges have ceased to accommodate motor vehicle traffic. The three bridges have been transformed into a picturesque location.[2]
History
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The first Tongmai Bridge was constructed in the 1950s. On April 9, 2000, a significant landslide transpired at Yiong Tsangpo in Tibet.[3] Following the breach of the dam and subsequent drainage of the lake's water, the original permanent reinforced concrete bridge and several adjacent highways were eroded, resulting in a complete disruption of traffic along the Sichuan-Tibet Southern Route. More than 90 townships in Motuo, Bomê County, and Nyingchi counties were rendered isolated.[4][5]
The second Tongmai Bridge incident occurred on August 2, 2013, when the rivet cables detached, leading to the failure of the bridge deck. Following 40 days of rigorous work, traffic successfully resumed on the morning of September 10, 2013. On the morning of January 26, 2015, traffic was halted due to the displacement of the steel frame structure.[6]
The third Tongmai Bridge, also Tongmai Special Bridge, commenced operations on November 28, 2015, successfully concluding the handover and special acceptance, and officially began the trial operation phase on November 29. The bridge is engineered as a single-tower, single-span space cable suspension structure, spanning the Parlung Tsangpo and a single tower of the Yiong Tsangpo tributary. It is 415.7 meters in length, with a main span of 256 meters and a pier height of 59.5 meters. [7]
References
[edit]- ^ 坐火_游西藏：慢游心_ (in Chinese). 旅游教育出版社. 2017. p. 112. ISBN 978-7-5637-2528-1. Retrieved 2024-11-20.
- ^ "通麦三座桥，见证天堑变通途". 澎湃新闻 (in Chinese). 2024-11-11. Retrieved 2024-11-20.
- ^ 中国地理学会; 中国科学院. 地理科学與资源研究所 (2006). 中国国家地理 (in Chinese). 地理知识杂志社. p. 154. Retrieved 2024-11-20.
- ^ "旅游：通麦大桥——西藏最大跨径的斜拉桥，见证了川藏线的变迁". 头条文章 (in Chinese). Retrieved 2024-11-20.
- ^ 聖潔的西藏：鄧予立攝影集 (in Chinese). 中华书局(香港)有限公司. 2022. p. 68. ISBN 978-988-8760-50-3. Retrieved 2024-11-20.
- ^ "这座桥背后的故事，令人颤栗又泪奔……". 新华报业网 (in Chinese). 2019-10-08. Retrieved 2024-11-20.
- ^ "通麦三桥看今昔：昔日"天险"成脚下通途". 西藏频道--人民网_网上的人民日报 (in Chinese). 2021-08-06. Retrieved 2024-11-20.
