Beijing-Tianjin High-speed Rail

Essential information：

Beijing-Tianjin Intercity Railway is an inter-city railway connecting Beijing and Tianjin Port City. It is an important part of the inter-city rail transit network around Bohai Sea in China's Medium-and Long-term Railway Network Planning. It is the first high-standard high-speed railway with a designed speed of 350 kilometers per hour in the mainland of China. It is also a part of the Medium-and Long-term Railway Network Planning. The first inter-city passenger transport system to be operated. The Beijing-Tianjin Intercity Railway was officially started on July 4, 2005 and opened on August 1, 2008. The Beijing-Tianjin Intercity Railway is 200 km long from Beijing South Railway Station to Tianjin Port Railway Station. As of August 2018, the Beijing-Tianjin Intercity Railway has a running speed of 350 km/h. As of July 1, 2018, the Beijing-Tianjin Intercity Railway has delivered 250 million passengers. On January 5, 2019, the national railway adjusted the train diagram, 26 pairs of Beijing-Tianjin intercity stations were changed from Tianjin Port Station to Tianjin Port West Station, and Yujiabao Station was renamed Binhai Station.

Value Significance:

The Beijing-Tianjin Intercity Railway has shortened the distance between Beijing and Tianjin Port, enlarged the space of various factors of production and resource allocation, and has had an important impact on the economic and social development of the two cities. It has also profoundly changed people's working and living concepts in both places and facilitated people's travel. At the same time, as China's first designed high-speed railway with a speed of 350 kilometers per hour, Beijing-Tianjin Intercity Railway has not only trained a group of explorers and pioneers in the development and construction of China's high-speed railway, but also provided technical accumulation and valuable experience for China's high-speed railway to lead the world; furthermore, Beijing-Tianjin Intercity Railway operates safely, smoothly and rides comfortably. The advantages of fast, energy-saving and environmental protection have promoted the tremendous transformation of transportation modes.

Technical difficulties：

The roadbed is very easy to settle: The foundation along the Beijing-Tianjin Intercity Railway is soft soil and soft soil, and the bedrock of Tianjin Port Section is less than 1000 meters. This kind of soil has the characteristics of high water content, high compressibility, poor permeability and low strength. There is no mature experience at home and abroad in laying ballastless track on this kind of soil. After a series of technical tackling, Chinese technicians have adopted measures such as closing part of the wells to reduce or control groundwater exploitation along the line, increasing the length and diameter of the piles of bridges and adopting adjustable high bearings, and adopting adjustable fasteners on the tracks to effectively control the deformation of the roadbed and settlement of bridges in the soft soil base area, so as to meet the needs of the soft soil foundation and other measures. Requirements for ballastless track laying under regional settlement conditions. Land resources are scarce: Beijing-Tianjin inter-city railway passes through two municipalities directly under the Central Government of Beijing and Tianjin Port, along which the economy is developed, the roads are crisscrossed, and the land resources are extremely valuable. In order to minimize the cutting of railway lines to the city and save precious land resources, through comprehensive technical and economic comparison, the Beijing-Tianjin inter-city railway has widely adopted bridge substitution transmission. The length of the bridge accounts for 87% of the total length of the line. The average land saving per kilometer of the bridge is 44 mu, which saves more than 1600 mu of land.

Key projects：

Liangshui River Bridge: Liangshuihe Bridge, located in Tongzhou District of Beijing, is a super bridge of Beijing-Tianjin Intercity Railway. The bridge spans the Sixth Ring Road and Liangshui River, with a total length of 21.563 km and 648 holes, with a maximum span of 100 meters and a minimum span of 48 meters. Beijing Ring Bridge: Beijing Ring Bridge, located in Beijing, is a bridge between Beijing and Tianjin Intercity Railway from Beijing South Railway Station to Beijing District. The bridge starts from about 700 meters west of Zuo'anmen in Dongcheng District of Beijing, and continuously goes southeast across urban roads such as Second, Third, Fourth and Fifth Ring Road. It passes through Fengtai District and Chaoyang District, and ends at Guijiafen Village, Taihu Town, Tongzhou District, after crossing Tonghuang Road. The bridge is 15.6 kilometers long. The maximum span occurs in the main span of the upper four-ring and five-ring rings. The span is 128 meters. The span of the main girder of the second and Third-Ring rings is 100 meters. The Beijing Ring Bridge closed on October 13, 2007.

Achievements in scientific research:

In 2009, the Beijing-Tianjin Intercity Railway Project won the locomotive quality engineering award; in the same year, the Beijing-Tianjin Intercity Railway Project won the Zhan Tianyou Civil Engineering Award. In 2010, Beijing-Tianjin Intercity Railway Project was awarded "100 Classic Construction Projects" for the 60th anniversary of the founding of New China. In January 2013, the Beijing-Tianjin Intercity Railway Project won the first prize for China's national scientific and technological progress.