August 15

Beijing Rail Transit Line 13 Capacity Expansion and Upgrade Project

Hou-Xin Section, Civil Construction Contract Section 16

The left-line shield machine successfully broke through

marking that for China's largest existing-line renovation project

the first shield-driven section has achieved twin-tube breakthrough

Main structure construction of the newly built section

has entered the full-speed sprint stage

laying the foundation for smoothly achieving the project's opening goal‍

Shield receiving site

The Beijing Rail Transit Line 13 Capacity Expansion and Upgrade Project involves the existing Line 13 Xierqi-Longze-Huilongguan station section, where through line renovation and other technical means, a total of 19 new stations and about 29 kilometers of new lines will be built, and about 34 kilometers of lines will be renovated. The existing Line 13's inverted "U"-shaped line will be split, creating an "X"-shaped east-west transverse line between Line 16 and Line 17. The two split lines will have the conditions for interconnection and interoperability, while also reserving conditions for cross-line operation, enabling cross-line organizational operation.

Route schematic diagram

Among the 19 stations in the newly built section, 9 are transfer stations, including Tiantongyuan East Station transferring with Line 17, Tiantongyuan Station with Line 5, Huilongguan East Street Station with Line 8, Xinlongze Station with Line 19 and the Northeast Loop Line, Software Park Station with the Line 19 branch, Malianwa Station with Line 16, Xueyuan South Road Station with the Changping Line southern extension, Xizhimen Station with Line 2 and Line 4, and Chegongzhuang Station with Line 2 and Line 6, greatly enhancing rail service functions.

Hoisting segments

This project is currently China's largest existing-line renovation project. The tunnel completed this time crosses the two urban districts of Changping and Haidian. Along the construction alignment there are many underground pipelines, a complex construction environment, numerous risk sources, and high construction risk. To ensure smooth tunneling by the shield machine, the construction team of China Railway 14th Bureau Group, after multiple analyses and demonstrations, adopted various safeguard measures such as setting up experimental sections and closely monitoring settlement data along the line, summed up a set of detailed tunneling parameters, overcame each major risk source one by one, and ultimately kept the maximum settlement data within 2 millimeters.

As a demonstration line for Beijing Rail Transit's "smart construction site," the Beijing Rail Transit Line 13 Capacity Expansion and Upgrade Project uses a "smart construction site" management system throughout the construction process to collect and process various front-end data at the construction site. By using intelligent means, it has effectively improved the safety and quality management level of the construction site and ensured that construction production remains in a controllable state of safety and quality.

Completed tunnel

According to reports, after the split of the Beijing Rail Transit Line 13 Capacity Expansion and Upgrade Project is completed, it will effectively solve problems such as poor turnback conditions for trains at the Xizhimen terminus, inability to shorten departure intervals, crowded carriages on Line 13, and queuing outside stations for flow control. It will create convenient travel conditions between the Huilongguan-Tiantongyuan area in Changping District and the Software Park area in Haidian District, focusing on strengthening connections between large residential clusters in the north and employment-concentrated areas such as Shangdi Software Park and Zhongguancun, greatly shortening travel time between regions and improving travel efficiency for citizens along the line. At the same time, it will further improve the rail transit network in the northern region and enhance rail transit service levels.