The Tianxin Depot of Shenzhen Metro Line 16 is the top priority of the entire line's construction, with the largest construction volume on the line. The Tianxin Depot is positioned as a major overhaul base for the network, undertaking major overhaul tasks for vehicles assigned to Line 16 and Line 19. It has 32 parking and inspection positions, 4 major overhaul positions, 2 biweekly and quarterly inspection positions, 1 temporary repair position, and 1 scheduled repair position. The depot covers an area of 268,000 square meters, with a total construction area of 173,600 square meters. It mainly includes 17 above- and below-cover individual buildings, such as the operation depot, joint inspection and repair depot, material warehouse, and comprehensive office building (three floors underground and 29 floors above ground).

The site of the Tianxin Depot was originally an industrial park, with 266 buildings demolished, totaling a demolition area of 155,000 square meters, accounting for about one-third of the demolition volume of the entire line. In addition, the site has strong karst development and complex geological conditions, with unfavorable geology such as karst and sand layers commonly present, making pile foundation construction difficult. This project is large in volume with overlapping processes, and during the peak period of the main structure construction, it also faced the sudden impact of the COVID-19 pandemic, posing a huge challenge to the project's construction organization and safety and quality control. Facing many difficulties, the project department organized construction personnel for a tough battle, scientifically organizing and reasonably arranging multiple processes such as scaffold erection, formwork installation, rebar fabrication and installation, and concrete pouring. All project personnel did not wait or rely on others, took proactive actions, and adopted multiple measures, ultimately winning this construction battle on schedule and achieving an excellent record of average monthly output value exceeding 100 million yuan for 18 consecutive months.

The project mainly adopts a reinforced concrete frame structure, with concrete usage reaching more than 1.3 million cubic meters, making it a typical mass concrete project. A leading group for mass concrete construction was specially established, and special seminars on construction plans were held multiple times to formulate special construction plans for pouring. The completed concrete pouring components of the Tianxin Depot are smooth, with clear edges and corners, straight and clear lines and surfaces, and no honeycomb, slurry leakage, formwork displacement, root rot, or cracks, with all indicators meeting acceptance standards. A complete set of experience was also summarized in aspects such as concrete mix proportion, formwork design and concrete pouring technology, selection of protective coatings for structural columns, management of concrete mixing station production, control of concrete mixing and transportation, control of mass concrete pouring technology, and concrete curing control.

Good news also from Phase II of Line 16

At 11 p.m. on July 31, the first-phase traffic diversion work at Fukeng Station of Section 4 of the Phase II project of Shenzhen Metro Line 16, constructed by the company, was successfully completed. The completion of this milestone provides a good working face for the next step of the station's main enclosure structure construction and lays the foundation for the subsequent main construction of the station. Fukeng Station is located on Shahe Road, a main road in Longgang District, Shenzhen. As an east-west traffic artery in Longgang District, Shahe Road has heavy surrounding traffic and dense underground pipelines. To do a good job in the first-phase traffic diversion work during the main stage of Fukeng Station, the project department planned ahead, organized carefully, and actively communicated and reported to the traffic management bureau to clarify the traffic diversion plan.

It is reported that Fukeng Station is a two-level underground 12-meter island station with a two-level prefabricated assembly structure, constructed using the open-cut method. This is the first prefabricated station in China to adopt an internal support system, and once completed, it will have significant reference value for similar metro station construction in the future.